Boston Private Financial (BPFH) 10-K 26 Feb 16 2015 Q4 Annual report Financial data

Document Entity Information Doc

Document Entity Information Document - USD ($)	12 Months Ended
	Dec. 31, 2015	Feb. 23, 2016	Jun. 30, 2015
Document Information [Line Items]
Entity Registrant Name	BOSTON PRIVATE FINANCIAL HOLDINGS INC
Entity Central Index Key	821,127
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q4
Amendment Flag	false
Entity Common Stock, Shares Outstanding		83,486,743
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 1,090,560,665

Consolidated Balance Sheet Stat

Consolidated Balance Sheet Statement - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Assets:
Cash and cash equivalents	$ 238,694	$ 172,609
Investment securities available-for-sale (amortized cost of $1,084,105 and $826,858 at December 31, 2015 and 2014, respectively)	1,084,510	829,993
Investment securities held-to-maturity (fair value of $116,384 and $142,339 at December 31, 2015 and 2014, respectively)	116,352	140,727
Stock in Federal Home Loan Banks	35,181	32,281
Loans held for sale	8,072	7,099
Total loans	5,719,212	5,269,936
Less: Allowance for loan losses	78,500	75,838
Net loans	5,640,712	5,194,098
Other real estate owned (“OREO”)	776	929
Premises and equipment, net	31,036	32,199
Goodwill	152,082	152,082
Intangible assets, net	33,007	39,718
Fees receivable	11,258	12,517
Accrued interest receivable	17,950	16,071
Deferred income taxes, net	51,699	47,576
Other assets	121,179	119,975
Total assets	7,542,508	6,797,874
Liabilities:
Deposits	6,040,437	5,453,879
Securities sold under agreements to repurchase	58,215	30,496
Federal Home Loan Bank borrowings	461,324	370,150
Junior subordinated debentures	106,363	106,363
Other liabilities	111,468	112,170
Total liabilities	6,777,807	6,073,058
Redeemable Noncontrolling Interests	18,088	20,905
Shareholders’ Equity:
Preferred stock, $1.00 par value; authorized: 2,000,000 shares; Series D, 6.95% Non-Cumulative Perpetual, issued and outstanding: 50,000 shares at December 31, 2015 and December 31, 2014; liquidation preference: $1,000 per share	47,753	47,753
Common stock, $1.00 par value; authorized: 170,000,000 shares; issued and outstanding: 83,410,961 shares at December 31, 2015 and 82,961,855 shares at December 31, 2014	83,411	82,962
Additional paid-in capital	600,670	610,903
Retained earnings/ (accumulated deficit)	12,886	(37,396)
Accumulated other comprehensive income/ (loss)	(1,500)	(697)
Total Company's shareholders’ equity	743,220	703,525
Noncontrolling interests	3,393	386
Total shareholders' equity	746,613	703,911
Total liabilities, redeemable noncontrolling interests and shareholders’ equity	$ 7,542,508	$ 6,797,874

Consolidated Balance Sheet Sta3

Consolidated Balance Sheet Statement Parenthetical - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Investment securities available for sale at amortized cost	$ 1,084,105	$ 826,858
Investment securities held to maturity at fair value	$ 116,384	$ 142,339
Preferred Stock, Par Value Per Share	$ 1	$ 1
Preferred Stock, Shares Authorized	2,000,000	2,000,000
Common Stock, Par Value Per Share	$ 1	$ 1
Common Stock, Shares Authorized	170,000,000	170,000,000
Common Stock, Shares, Issued	83,410,961	82,961,855
Common Stock, Shares, Outstanding	83,410,961	82,961,855
Series D Preferred Stock [Member]
Preferred Stock, Par Value Per Share	$ 1
Preferred Stock, Shares Issued	50,000	50,000
Preferred Stock, Shares Outstanding	50,000	50,000
Preferred Stock, Liquidation Preference Per Share	$ 1,000	$ 1,000

Consolidated Statement of Opera

Consolidated Statement of Operations - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest and dividend income:
Loans		$ 192,184	$ 191,658	$ 191,594
Taxable investment securities		4,403	3,162	2,056
Non-taxable investment securities		4,758	3,738	3,113
Mortgage-backed securities		10,933	6,925	5,441
Federal funds sold and other		1,390	1,359	970
Total interest and dividend income		213,668	206,842	203,174
Interest expense:
Deposits		16,002	14,102	13,395
Federal Home Loan Bank borrowings		7,959	9,108	10,963
Junior subordinated debentures		3,875	3,872	4,408
Repurchase agreements and other short-term borrowings		62	59	390
Total interest expense		27,898	27,141	29,156
Net interest income		185,770	179,701	174,018
Provision/ (credit) for loan losses		(1,555)	(6,400)	(10,000)
Net interest income after provision for loan losses		187,325	186,101	184,018
Fees and other income:
Investment management fees		45,694	47,123	43,816
Wealth advisory fees		50,437	48,082	42,352
Wealth management and trust fees		51,309	34,582	26,547
Other banking fee income		8,440	7,033	7,463
Gain on sale of loans, net		1,207	2,158	2,519
Gain on repurchase of debt		0	0	620
Gain/ (loss) on sale of investments, net		236	(7)	49
Gain/ (loss) on OREO, net		124	957	(13)
Gain on sale of Pacific Northwest offices		0	0	10,574
Other		3,722	870	2,414
Total fees and other income		161,169	140,798	136,341
Operating expense:
Salaries and employee benefits		159,401	146,648	140,761
Occupancy and equipment		37,183	31,041	29,822
Professional services		12,861	12,473	12,109
Marketing and business development		9,063	7,989	7,094
Contract services and data processing		6,037	5,816	5,827
Amortization of intangibles		6,711	4,836	4,327
FDIC insurance		3,979	3,459	3,700
Restructuring expense		3,724	739	0
Other		16,222	14,128	17,065
Total operating expense		255,181	227,129	220,705
Income before income taxes		93,313	99,770	99,654
Income tax expense	[1]	30,392	32,365	32,963
Net income from continuing operations		62,921	67,405	66,691
Net income from discontinued operations		6,411	6,160	7,792
Net income before attrubution to noncontrolling interests		69,332	73,565	74,483
Less: Net income attributable to noncontrolling interests		4,407	4,750	3,948
Net income attributable to the Company		64,925	68,815	70,535
Adjustments to net income attributable to the Company to arrive at net income attributable to common shareholders		3,194	4,563	16,636
Net income attributable to common shareholders for basic earnings per share calculation		$ 61,731	$ 64,252	$ 53,899
Basic earnings per share attributable to common shareholders:
From continuing operations:		$ 0.68	$ 0.73	$ 0.60
From discontinued operations:		0.08	0.08	0.10
Total attributable to common shareholders:		0.76	0.81	0.70
Diluted earnings per share attributable to common shareholders:
From continuing operations:		0.66	0.72	0.59
From discontinued operations:		0.08	0.07	0.09
Total attributable to common shareholders:		$ 0.74	$ 0.79	$ 0.68
Common Stock [Member]
Basic earnings per share attributable to common shareholders:
Weighted average basic common shares outstanding		80,885,253	78,921,480	77,373,817
Diluted earnings per share attributable to common shareholders:
Weighted average diluted common shares outstanding	[2]	83,225,153	80,879,231	78,753,524
[1]	The Company’s effective tax rate for 2015, 2014, and 2013 are not consistent due to earnings from tax-exempt investments, non-deductible compensation, state and local taxes, income tax credits and income attributable to noncontrolling interests having a different impact on the effective tax rate due primarily to the different levels of income before taxes in years 2015, 2014, and 2013. See Part II. Item 8. “Financial Statements and Supplementary Data - Note 17: Income Taxes” for additional details.
[2]	The diluted EPS computations for the years ended December 31, 2015, 2014, and 2013 do not assume the conversion, exercise or contingent issuance of the following shares for the following periods because the result would have been antidilutive for the periods indicated. As a result of the anti-dilution, the potential common shares excluded from the diluted EPS computation are as follows: For the year ended December 31, 2015 2014 2013Shares excluded due to anti-dilution (treasury method):(In thousands)Potential common shares from: Convertible trust preferred securities (a)1 1 1Total shares excluded due to anti-dilution1 1 1 For the year ended December 31, 2015 2014 2013Shares excluded due to exercise price exceeding the average market price of common shares during the period (total outstanding):(In thousands)Potential common shares from: Options, restricted stock, or other dilutive securities (b)548 829 1,399Total shares excluded due to exercise price exceeding the average market price of common shares during the period548 829 1,399(a) If the effect of the conversion of the trust preferred securities would have been dilutive, an immaterial amount of interest expense, net of tax, related to the convertible trust preferred securities would have been added back to net income attributable to common shareholders for the diluted EPS computation for the years presented.(b)Options to purchase shares of common stock, non-participating performance- and certain time-based restricted stock, and other dilutive securities that were outstanding at period ends were not included in the computation of diluted EPS or in the above anti-dilution table because their exercise or conversion prices were greater than the average market price of the common shares during the respective periods.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2015	[1]	Sep. 30, 2015	[1]	Jun. 30, 2015	[1]	Mar. 31, 2015	[1]	Dec. 31, 2014	[1]	Sep. 30, 2014	[1]	Jun. 30, 2014	[1]	Mar. 31, 2014	[1]	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net income attributable to the Company	$ 15,002		$ 13,530		$ 17,610		$ 18,783		$ 12,177		$ 18,265		$ 21,332		$ 17,041		$ 64,925	$ 68,815	$ 70,535
Other comprehensive income/ (loss), net of tax:
Unrealized gain/ (loss) on securities available for sale																	(1,349)	3,736	(7,141)
Reclassification adjustment for net realized gain/ (loss) included in net income																	139	(4)	28
Net unrealized gain/ (loss) on securities available for sale																	(1,488)	3,740	(7,169)
Unrealized gain/ (loss) on cash flow hedges																	(1,554)	(2,009)	2
Reclassification adjustment for net realized gain/ (loss) included in net income																	(2,354)	(1,849)	(1,204)
Net unrealized gain/ (loss) on cash flow hedges																	800	(160)	1,206
Net unrealized gain/ (loss) on other																	(115)	(80)	(358)
Other comprehensive income/ (loss), net of tax																	(803)	3,500	(6,321)
Total comprehensive income attributable to the Company, net																	$ 64,122	$ 72,315	$ 64,214
[1]	Due to rounding, the sum of the four quarters may not add to the year to date total.

Consolidated Statement of Share

Consolidated Statement of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Preferred Stock Including Additional Paid in Capital [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]
Beginning Balance at Dec. 31, 2012	$ 603,102	$ 78,744	$ 58,089	$ 640,891	$ (176,746)	$ 2,124	$ 0
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net income attributable to the Company	70,535	0	0	0	70,535	0	0
Other comprehensive income/ (loss), net	(6,321)	0	0	0	0	(6,321)	0
Dividends paid to common shareholders: $0.24 per share	(19,129)	0	0	(19,129)	0	0	0
Dividends paid to preferred shareholders	(2,660)	0	0	(2,660)	0	0	0
Stock Repurchased and Retired During Period, Value	(69,827)	0	(58,089)	(11,738)	0	0	0
Net Change in Noncontrolling Interests	171	0	0	0	0	0	171
Net proceeds from issuance of:
Stock Issued During Period, Value, New Issues	47,753	0	47,753	0	0	0	0
Stock Issued During Period, Value, Employee Stock Purchase Plan	1,230	157	0	1,073	0	0	0
Stock Issued under Equity Plans, net of shares forfeited, canceled, or withheld for employee taxes, value	0	622	0	(622)	0	0	0
Amortization of stock compensation and employee stock purchase plan	6,747	0	0	6,747	0	0	0
Stock options exercised	2,332	315	0	2,017	0	0	0
Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net	(663)	0	0	(663)	0	0	0
Other equity adjustments	418	0	0	418	0	0	0
Ending Balance at Dec. 31, 2013	633,688	79,838	47,753	616,334	(106,211)	(4,197)	171
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net income attributable to the Company	68,815	0	0	0	68,815	0	0
Other comprehensive income/ (loss), net	3,500	0	0	0	0	3,500	0
Dividends paid to common shareholders: $0.24 per share	(25,829)	0	0	(25,829)	0	0	0
Dividends paid to preferred shareholders	(3,475)	0	0	(3,475)	0	0	0
Net Change in Noncontrolling Interests	215	0	0	0	0	0	215
Net proceeds from issuance of:
Stock Issued During Period, Value, New Issues	22,264	1,801	0	20,463	0	0	0
Stock Issued under Equity Plans, net of shares forfeited, canceled, or withheld for employee taxes, value	(1,609)	1,091	0	(2,700)	0	0	0
Amortization of stock compensation and employee stock purchase plan	6,239	0	0	6,239	0	0	0
Stock options exercised	1,807	232	0	1,575	0	0	0
Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net	1,294	0	0	1,294	0	0	0
Other equity adjustments	(2,998)	0	0	(2,998)	0	0	0
Ending Balance at Dec. 31, 2014	703,911	82,962	47,753	610,903	(37,396)	(697)	386
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net income attributable to the Company	64,925	0	0	0	64,925	0	0
Other comprehensive income/ (loss), net	(803)	0	0	0	0	(803)	0
Dividends paid to common shareholders: $0.24 per share	(29,608)	0	0	(16,703)	(12,905)	0	0
Dividends paid to preferred shareholders	(3,475)	0	0	(1,737)	(1,738)	0	0
Net Change in Noncontrolling Interests	3,007	0	0	0	0	0	3,007
Net proceeds from issuance of:
Stock Issued During Period, Value, Employee Stock Purchase Plan	1,575	138	0	1,437	0	0	0
Stock Issued under Equity Plans, net of shares forfeited, canceled, or withheld for employee taxes, value	(2,090)	161	0	(2,251)	0	0	0
Amortization of stock compensation and employee stock purchase plan	9,820	0	0	9,820	0	0	0
Stock options exercised	1,206	150	0	1,056	0	0	0
Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net	(1,262)	0	0	(1,262)	0	0	0
Other equity adjustments	(593)	0	0	(593)	0	0	0
Ending Balance at Dec. 31, 2015	$ 746,613	$ 83,411	$ 47,753	$ 600,670	$ 12,886	$ (1,500)	$ 3,393

Consolidated Statement of Shar7

Consolidated Statement of Shareholders' Equity Shareholders' Equity Parenthetical - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Common Stock, Dividends, Per Share, Cash Paid	$ 0.36	$ 0.32	$ 0.24
Stock Issued During Period, Shares, New Issues	138,463	1,801,446	156,983
Stock Issued During Period, Shares, Share-based Compensation, Gross	738,025	1,344,808	677,620
Stock Issued During Period, Shares, Share-based Compensation, Forfeited	(408,638)	(125,658)	(55,213)
Shares of stock withheld for employee taxes	(168,490)	(128,003)	0

Consolidated Statement of Cash

Consolidated Statement of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net income attributable to the Company	$ 64,925	$ 68,815	$ 70,535
Adjustments to arrive at net income/(loss) from continuing operations
Net income attributable to noncontrolling interests	(4,407)	(4,750)	(3,948)
Net pre-tax gain from operating activities of discontinued operations	11,234	11,258	13,913
Tax expense from discontinued operations	4,823	5,098	6,121
Net income from continuing operations	62,921	67,405	66,691
Adjustments to reconcile net income/(loss) from continuing operations to net cash provided by/(used in) operating activities:
Depreciation and amortization	22,187	19,378	19,107
Net income attributable to noncontrolling interests	(4,407)	(4,750)	(3,948)
Equity issued as compensation	9,820	6,239	6,747
Provision/ (credit) for loan losses	(1,555)	(6,400)	(10,000)
Loans originated for sale	(153,445)	(71,858)	(231,539)
Proceeds from sale of loans held for sale	153,679	71,440	254,345
Gain on repurchase of debt	0	0	(620)
Gain on sale of Pacific Northwest offices	0	0	(10,574)
Deferred income tax expense/(benefit)	(4,575)	5,058	10,313
Net decrease/(increase) in other operating activities	2,852	14,387	5,861
Net cash provided by/(used in) operating activities of continuing operations	87,477	100,899	106,383
Net cash provided by/(used in) operating activities of discontinued operations	6,411	6,160	7,792
Net cash provided by/(used in) operating activities	93,888	107,059	114,175
Investment securities available for sale:
Payments to Acquire Available-for-sale Securities	506,529	335,404	243,359
Proceeds from Sale of Available-for-sale Securities	34,160	6,450	4,062
Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities	208,467	190,926	227,973
Investment securities held to maturity:
Payments to Acquire Held-to-maturity Securities	0	(48,835)	(112,391)
Proceeds from Maturities, Prepayments and Calls of Held-to-maturity Securities	23,741	19,263	325
(Investments)/distributions in trusts, net	(165)	(385)	154
(Purchase)/ redemption of Federal Home Loan Banks stock	(2,900)	6,331	3,369
Net increase in portfolio loans	(452,675)	(221,256)	(310,834)
Proceeds from recoveries of loans previously charged off	6,253	11,163	7,731
Proceeds from sale of OREO	277	1,102	2,455
Proceeds from sale of portfolio loans	0	58,568	9,449
Proceeds from sale of Pacific Northwest offices	0	0	123,693
Capital expenditures, net of sale proceeds	(5,419)	(9,705)	(8,311)
Cash received from dispositions/ (paid for acquisitions, including deferred acquisition obligations, net of cash acquired)	0	(44,845)	0
Payments for (Proceeds from) Other Investing Activities	0	(1,601)	(224)
Net cash provided by/(used in) investing activities - continuing operations	(694,790)	(368,228)	(295,908)
Net cash provided by/(used in) investing activities - discontinued operations	0	0	0
Net cash provided by/(used in) investing activities	(694,790)	(368,228)	(295,908)
Cash flows from financing activities:
Net increase in deposits	586,558	343,509	199,381
Net (decrease)/increase in securities sold under agreements to repurchase and other	27,719	(71,857)	(13,966)
Net (decrease)/increase in short-term Federal Home Loan Bank borrowings	40,000	10,000	(40,000)
Advances of long-term Federal Home Loan Bank borrowings	123,636	55,000	120,000
Repayments of long-term Federal Home Loan Bank borrowings	(72,462)	(62,104)	(120,867)
Repurchase of debt	0	0	(35,536)
Proceeds from issuance of Series D preferred stock, net	0	0	47,753
Repurchase of Series B preferred stock, including deemed dividend at repurchase	0	0	(69,827)
Dividends paid to common share holders	(29,608)	(25,829)	(19,129)
Dividends paid to preferred shareholders	(3,475)	(3,475)	(2,660)
Tax savings/ (deficiency) from certain stock compensation awards	(1,262)	1,294	(663)
Proceeds from stock option exercises	1,206	1,807	2,332
Proceeds from issuance of common stock, net	(515)	(353)	1,230
Distributions paid to noncontrolling interests	(4,611)	(4,426)	(3,416)
Other equity adjustments	(199)	(1,669)	238
Net cash provided by/(used in) financing activities - continuing operations	666,987	241,897	64,870
Net cash provided by/(used in) financing activities - discontinued operations	0	0	0
Net cash provided by/(used in) financing activities	666,987	241,897	64,870
Net increase/(decrease) in cash and cash equivalents	66,085	(19,272)	(116,863)
Cash and cash equivalents at beginning of year	172,609	191,881	308,744
Cash and cash equivalents at end of period	238,694	172,609	191,881
Supplementary schedule of non-cash investing and financing activities:
Cash paid for interest	27,749	30,043	29,377
Cash paid for income taxes, net of (refunds received)	33,318	30,072	32,332
Change in unrealized gain/ (loss) on securities available for sale, net of tax	(1,488)	3,740	(7,169)
Change in unrealized gain/ (loss) on cash flow hedges, net of tax	800	(160)	1,206
Change in unrealized gain/ (loss) on other, net of tax	115	80	358
Loans transferred into/(out of) held for sale from/(to) portfolio	0	56,967	5,593
Loans charged-off	(2,036)	(5,296)	(5,417)
Loans transferred into other real estate owned from held for sale or portfolio	0	298	(372)
Reversal of contingent consideration	2,026	0	0
Equity issued for acquisitions, including deferred acquisition obligations	$ 0	$ 21,007	$ 0

Basis of Presentation and Summa

Basis of Presentation and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2015
Basis of Presentation and Significant Accounting Policies [Abstract]
Basis of Presentation and Significant Accounting Policies [Text Block]	BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Boston Private Financial Holdings, Inc. (the “Company” or “BPFH”), is a bank holding company (the “Holding Company”) with four reportable segments: Private Banking, Wealth Management and Trust, Investment Management, and Wealth Advisory. The Private Banking segment is comprised of the banking operations of Boston Private Bank & Trust Company (the “Bank” or “Boston Private Bank”), a trust company chartered by The Commonwealth of Massachusetts, insured by the Federal Deposit Insurance Corporation (the “FDIC”), and a wholly-owned subsidiary of the Company. Boston Private Bank currently operates in three geographic markets: New England, San Francisco Bay, and Southern California. The Wealth Management and Trust segment is comprised of Boston Private Wealth LLC (“Boston Private Wealth”), which was created from Boston Private Bank’s existing wealth management business as well as the acquisition of Banyan Partners, LLC (“Banyan”), which Boston Private Bank purchased in the fourth quarter of 2014. This segment also includes the trust operations of Boston Private Bank. The segment offers investment management, wealth management, family office, and trust services to individuals, families, and institutions. The Wealth Management and Trust segment operates in New England; South Florida; Texas; California; Atlanta, Georgia; and Madison, Wisconsin. For comparative purposes, the Wealth Management and Trust data that was previously included within the Private Banking segment has been reclassified into the Wealth Management and Trust segment. The Investment Management segment has two consolidated affiliates, consisting of Dalton, Greiner, Hartman, Maher & Co., LLC (“DGHM”) and Anchor Capital Advisors, LLC (“Anchor”) (together, the “Investment Managers”). The Wealth Advisory segment has two consolidated affiliates, consisting of KLS Professional Advisors Group, LLC (“KLS”) and Bingham, Osborn & Scarborough, LLC (“BOS”) (together, the “Wealth Advisors” and, together with the Wealth Management and Trust and Investment Management segments, the “Wealth and Investment” businesses). Basis of Presentation The consolidated financial statements of the Company include the accounts of the Company and its wholly-owned and majority-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation, and the portion of income allocated to owners other than the Company is included in “Net income attributable to noncontrolling interests” in the consolidated statements of operations. Redeemable noncontrolling interests in the consolidated balance sheets reflect the maximum redemption value of agreements with other owners. All accounts related to divested affiliates are included within the results of discontinued operations for all periods presented. The financial statements are prepared in accordance with accounting principles generally accepted in the United States (“U.S.”) (“GAAP”). Reclassifications of amounts in prior years’ consolidated financial statements are made whenever necessary to conform to the current year’s presentation. Use of Estimates In preparing the consolidated financial statements, management is required to make certain estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheet and revenues and expenses for the period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to change, in the near term, relate to the determination of the allowance for loan losses, evaluation of potential impairment of goodwill and other intangibles, and income tax estimates. Significant Group Concentrations of Credit Risk Most of the Company’s activities are with clients within the New England, San Francisco Bay, and Southern California regions of the country. The Company does not believe it has any significant concentrations in any one industry, geographic location, or with any one client. Part II. Item 8. “Financial Statements and Supplementary Data - Note 4: Investment Securities,” highlights the types of securities in which the Company invests, and Part II. Item 8. “Financial Statements and Supplementary Data - Note 5: Loan Portfolio and Credit Quality,” describes the concentration of the Private Banking loan data based on the location of the lender. Statement of Cash Flows For purposes of reporting cash flows, the Company considers cash and due from banks and federal funds sold, all of which have original maturities with 90 days or less, to be cash equivalents. Cash and Due from Banks The Bank is required to maintain average reserve balances in an account with the Federal Reserve based upon a percentage of certain deposits. As of December 31, 2015 and 2014 , the daily amounts required to be held in the aggregate for the Bank were $4.6 million and $8.1 million , respectively. Investment Securities Available-for-sale investment securities are reported at fair value, with unrealized gains and losses credited or charged, net of the estimated tax effect, to accumulated other comprehensive income/ (loss). Held-to-maturity investment securities are those which the Company has the positive intent and ability to hold to maturity and are reported at amortized cost. Premiums and discounts on the investment securities are amortized or accreted into net interest income by the level-yield method. Gains and losses on the sale of the available-for-sale investments are recognized at the trade date on a specific identification basis. Dividend and interest income is recognized when earned and is recorded on the accrual basis. The Company conducts a quarterly review and evaluation of its investment securities to determine if the decline in fair value of a security below its amortized cost is deemed to be other-than-temporary. Other-than-temporary impairment losses are recognized on securities when: (i) the holder has an intention to sell the security; (ii) it is more likely than not that the security will be required to be sold prior to recovery; or (iii) the holder does not expect to recover the entire amortized cost basis of the security. Other-than-temporary losses are reflected in earnings as a charge against gain on sale of investments, net, to the extent the impairment is related to credit losses. The amount of the impairment related to other factors is recognized in accumulated other comprehensive income/ (loss). The Company has no intention to sell any securities in an unrealized loss position at December 31, 2015 nor is it more likely than not that the Company would be required to sell such securities prior to the recovery of the unrealized losses. As of December 31, 2015 , the Company believes that all impairments of investment securities are temporary in nature. No other-than-temporary impairment losses were recognized in the consolidated statements of operations for the years ended December 31, 2015 , 2014 , and 2013 . Loans Held for Sale Loans originated and held for sale in the secondary market are carried at the lower of cost or estimated fair value in the aggregate. Fair value is based on commitments on hand from investors or prevailing market prices. Unrealized losses, if any, are recognized through a valuation allowance by charges to income. Loans transferred to the held for sale category from the loan portfolio are transferred at the lower of cost or fair value, usually as determined at the individual loan level. If fair value is less than cost, then a charge for the difference will be made to the allowance for loan losses if the decline in value is due to credit issues. Gains or losses on the sale of loans are recognized at the time of sale on a specific identification basis. Interest income is recognized on an accrual basis when earned. Loans Loans are carried at the principal amount outstanding, net of deferred loan origination fees and costs, charge-offs, and interest payments applied to principal on nonaccrual loans. Loan origination fees, net of related direct incremental loan origination costs, are deferred and recognized into income over the contractual lives of the related loans as an adjustment to the loan yield, using the level-yield method. If a loan is paid off prior to maturity, the unamortized portion of net fees/cost is recognized into interest income. If a loan is sold, the unamortized portion of net fees/cost is recognized at the time of sale as a component of the gain or loss on sale of loans. When the Company analyzes its loan portfolio to determine the adequacy of its allowance for loan losses, it categorizes the loans by portfolio segment and class of financing receivable based on the similarities in risk characteristics for the loans. The Company has determined that its portfolio segments and classes of financing receivables are one and the same. The level at which the Company develops and documents its allowance for loan loss methodology is consistent with the grouping of financing receivables based upon initial measurement attributes, risk characteristics, and the Company’s method for monitoring and assessing credit risks. These portfolio segments and classes of financing receivables are: • Commercial and industrial • Commercial real estate • Construction and land • Residential mortgage • Home equity • Consumer and other The past due status of a loan is determined in accordance with its contractual repayment terms. All portfolio segments are reported past due when one scheduled payment is due and unpaid for 30 days or more. The Bank’s policy is to discontinue the accrual of interest on a loan when the collectability of principal or interest is in doubt. When management determines that it is probable that the Bank will not collect all principal and interest on a loan in accordance with the original loan terms, the loan is designated as impaired. Impaired loans are usually commercial loans, which include construction and land loans, for which it is probable that the Company will not collect all amounts due according to the contractual terms of the loan agreement, and all loans restructured in a troubled debt restructuring. Accrual of interest income is discontinued and all interest previously accrued but not collected is reversed against current period interest income when a loan is initially classified as nonaccrual. Generally, interest received on nonaccrual loans is applied against principal or, on a limited basis, reported as interest income on a cash basis, when according to management’s judgment, the collectability of principal is reasonably assured. The Bank’s general policy for returning a loan to accrual status requires the loan to be brought current, for the client to show a history of making timely payments (generally six consecutive months), and when the financial position of the borrower and other relevant factors indicate there is no longer doubt as to the collectability of the loan. The Bank’s loan commitments are generally short-term in nature with terms that are primarily variable. Given the limited interest rate exposure posed by the commitments, the Bank estimates the fair value of these commitments to be immaterial. Credit Quality Indicators The Bank uses a risk rating system to monitor the credit quality of its loan portfolio. Loan classifications are assessments made by the Bank of the status of the loans based on the facts and circumstances known to the Bank, including management’s judgment, at the time of assessment. Some or all of these classifications may change in the future if there are unexpected changes in the financial condition of the borrower, including but not limited to, changes resulting from continuing deterioration in general economic conditions on a national basis or in the local markets in which the Bank operates adversely affecting, among other things, real estate values. Such conditions, as well as other factors which adversely affect borrowers’ ability to service or repay loans, typically result in changes in loan default and charge-off rates, and increased provisions for loan losses, which would adversely affect the Company’s financial performance and financial condition. These circumstances are not entirely foreseeable and, as a result, it may not be possible to accurately reflect them in the Company’s analysis of credit risk. A summary of the rating system used by the Bank follows: Pass - All loans graded as pass are considered acceptable credit quality by the Bank and are grouped for purposes of calculating the allowance for loan losses. Generally, only commercial loans, including commercial real estate, commercial and industrial loans, and construction and land loans are given a numerical grade. For residential, home equity and consumer loans, the Bank classifies loans as pass unless there is known information such as delinquency or client requests for modifications which, due to financial difficulty, would then generally result in a risk rating such as special mention or more severe depending on the factors. Special Mention - Loans rated in this category are defined as having potential weaknesses that deserve management’s close attention. If left uncorrected, these potential weaknesses may, at some future date, result in the deterioration of the repayment prospects for the credit or the Bank’s credit position. These loans are currently protected but have the potential to deteriorate to a substandard rating. For commercial loans, the borrower’s financial performance may be inconsistent or below forecast, creating the possibility of liquidity problems and shrinking debt service coverage. In loans having this rating, the primary source of repayment is still good, but there is increasing reliance on collateral or guarantor support. Collectability of the loan is not yet in jeopardy. In particular, loans in this category are considered more variable than other categories, since they will typically migrate through categories more quickly. Substandard - Loans rated in this category are inadequately protected by the current sound worth and paying capacity of the obligor or of the collateral pledged, if any. A substandard credit has a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the Bank will sustain some loss if the deficiencies are not corrected. Substandard loans may be either still accruing or nonaccruing depending upon the severity of the risk and other factors such as the value of the collateral, if any, and past due status. Doubtful - Loans rated in this category indicate that collection or liquidation in full on the basis of currently existing facts, conditions, and values, is highly questionable and improbable. Loans in this category are usually on nonaccrual and classified as impaired. Restructured Loans When the Bank, for economic or legal reasons related to a borrower’s financial difficulties, grants a concession to a troubled borrower that it would not otherwise consider, the loan is classified as a restructured loan pursuant to Accounting Standards Codification (“ASC”) 470, Debt . The concession either stems from an agreement between the creditor and the Bank or is imposed by law or a court. The concessions may include: • Deferral of principal and/or interest payments • Lower interest rate as compared to a new loan with comparable risk and terms • Extension of the maturity date • Reduction in the principal balance owed All loans whose terms have been modified in a troubled debt restructuring, including commercial, residential, and consumer, are evaluated for impairment under ASC 310, Receivables . Generally, a nonaccrual loan that is restructured remains on nonaccrual status for a period of at least six months to demonstrate that the borrower can meet the restructured terms. However, performance prior to the restructuring, or significant events that coincide with the restructuring, are considered when assessing whether the borrower can meet the new terms and may result in the loan being returned to accrual status at the time of the restructuring or after a shorter performance period. If the borrower’s ability to meet the revised payment schedule is uncertain, the loan remains classified as a nonaccrual loan. A loan may be removed from a restructured classification after the next fiscal year end, if the restructured terms include a market interest rate and the borrower has demonstrated performance with the restructured terms. Allowance for Loan and Lease Losses The allowance for loan losses (“allowance”) is an estimate of the inherent risk of loss in the loan portfolio as of the consolidated balance sheet dates. Management estimates the level of the allowance based on all relevant information available. Changes to the required level in the allowance result in either a provision for loan loss expense, if an increase is required, or a credit to the provision, if a decrease is required. Loan losses are charged to the allowance when management believes that the collectability of the loan principal is unlikely. Recoveries on loans previously charged-off are credited to the allowance when received in cash. The Company’s allowance is accounted for in accordance with guidance issued by various regulatory agencies, including: the Federal Financial Institutions Examination Council Policy Statement on the Allowance for Loan and Lease Losses (December 2006); Securities and Exchange Commission (“SEC”) Staff Accounting Bulletin No. 102, Selected Loan Loss Methodology and Documentation Issues ; ASC 310; and ASC 450, Contingencies . The allowance consists of three primary components: general reserves on pass graded loans, allocated reserves on non-impaired special mention and substandard loans, and the allocated reserves on impaired loans. The calculation of the allowance involves a high degree of management judgment and estimates designed to reflect the inherent risk of loss in the loan portfolio at the measurement date. General reserves are calculated for each loan pool consisting of pass graded loans segregated by portfolio segment, by applying estimated net loss percentages based upon the Bank’s actual historical net charge-offs and, adjusted as appropriate, on a consistent manner based upon consideration of qualitative factors to arrive at a total loss factor for each portfolio segment. The rationale for qualitative adjustments is to more accurately reflect the current inherent risk of loss in the respective portfolio segments than would be determined through the sole consideration of the Bank’s actual historical net charge-off rates. The numerical factors assigned to each qualitative factor are based upon observable data, if applicable, as well as management’s analysis and judgment. The qualitative factors considered by the Company include: • Volume and severity of past due, nonaccrual, and adversely graded loans, • Volume and terms of loans, • Concentrations of credit, • Management’s experience, as well as loan underwriting and loan review policy and procedures, • Economic and business conditions impacting the Bank’s loan portfolio, as well as consideration of collateral values, and • External factors, including consideration of loss factor trends, competition, and legal and regulatory requirements. The Bank makes an independent determination of the applicable loss rate for these factors based on relevant local market conditions, credit quality, and portfolio mix. Each quarter, management reviews the loss factors to determine if there have been any changes in its loan portfolio, market conditions, or other risk indicators which would result in a change to the current loss factor. Allocated reserves on non-impaired special mention and substandard loans reflect management’s assessment of increased risk of losses associated with these types of adversely graded loans. An allocated reserve is assigned to these pools of loans based upon management’s consideration of the credit attributes of individual loans within each pool of loans, including consideration of loan to value ratios, past due status, strength and willingness of the guarantors, and other relevant attributes, as well as the qualitative factors considered for the general reserve as discussed above. These considerations are determined separately for each type of portfolio segment. The allocated reserves are a multiple of the general reserve for each respective portfolio segments, with a greater multiple for loans with increased risk ( i.e. , special mention loans versus substandard loans). A loan is considered impaired in accordance with ASC 310 when, based upon current information and events, it is probable that a creditor will be unable to collect all amounts due according to the contractual terms of the loan agreement. Impairment is measured based on the fair value of the loan, expected future cash flows discounted at the loan’s effective interest rate, or as a practical expedient, impairment may be determined based upon the observable market price of the loan, or the fair value of the collateral, less estimated costs to sell, if the loan is “collateral dependent.” For collateral dependent loans, appraisals are generally used to determine the fair value. When a collateral dependent loan becomes impaired, an updated appraisal of the collateral is obtained, if appropriate. Appraised values are generally discounted for factors such as the Bank’s intention to liquidate the property quickly in a foreclosure sale or the date when the appraisal was performed if the Bank believes that collateral values have declined since the date the appraisal was done. The Bank may use a broker opinion of value in addition to an appraisal to validate the appraised value. In certain instances, the Bank may consider broker opinions of value as well as other qualitative factors while an appraisal is being prepared. If the loan is deemed to be collateral dependent, generally the difference between the book balance (client balance less any prior charge-offs or client interest payments applied to principal) and the fair value of the collateral is taken as a partial charge-off through the allowance for loan losses in the current period. If the loan is not determined to be collateral dependent, then a specific allocation to the general reserve is established for the difference between the book balance of the loan and the expected future cash flows discounted at the loan’s effective interest rate. Charge-offs for loans not considered to be collateral dependent are made when it is determined a loss has been incurred. Impaired Loans are removed from the general loan pools. There may be instances where the loan is considered impaired although based on the fair value of underlying collateral or the discounted expected future cash flows there is no impairment to be recognized. In addition, all loans which are classified as troubled debt restructurings (“TDRs”) are considered impaired. In addition to the three primary components of the allowance for loan losses discussed above (general reserve, allocated reserves on non-impaired special mention and substandard loans, and the allocated reserves on impaired loans), the Bank may also maintain an insignificant amount of additional allowance for loan losses (the unallocated allowance for loan losses). The unallocated reserve reflects the fact that the Allowance for Loan Losses is an estimate and contains a certain amount of imprecision risk. It represents risks identified by Management that are not already captured in the qualitative factors discussed above. The unallocated allowance for loan losses is not considered significant by the Company and will remain at zero unless additional risk is identified. While this evaluation process utilizes historical and other objective information, the classification of loans and the establishment of the allowance for loan losses rely to a great extent on the judgment and experience of management. While management evaluates currently available information in establishing the allowance for loan losses, future adjustments to the allowance may be necessary if economic conditions differ substantially from the assumptions used in making the evaluations. In addition, various regulatory agencies, as an integral part of their examination process, periodically review a financial institution’s allowance for loan losses as well as loan grades/classifications. Such agencies may require the financial institution to recognize additions to the allowance for loan losses or increases to adversely graded loans based on their judgments about information available to them at the time of their examination. Reserve for Unfunded Loan Commitments The Company maintains a reserve for unfunded loan commitments for such items as unused portion of lines of credit and unadvanced construction loans. The reserve is maintained at a level that reflects the risk in these various commitments. Management determines the reserve percentages on a quarterly basis based on a percentage of the current historical loss rates for these portfolios. Once a loan commitment is funded, the reserve for unfunded loan commitment is reversed and a corresponding allowance for loan loss reserve is established. This unfunded loan commitment reserve is included in other liabilities in the consolidated balance sheets. Net adjustments to the reserve for unfunded commitments are included in other operating expense in the consolidated statements of operations. Other Real Estate Owned (“OREO”) OREO is comprised of property acquired through foreclosure proceedings or acceptance of a deed-in-lieu of foreclosure in partial or total satisfaction of certain loans. Properties are recorded at the lower of the recorded investment in the loan at the time of acquisition or the fair value, as established by a current appraisal, comparable sales, and other estimates of value obtained principally from independent sources, less estimated costs to sell. Any decline in fair value compared to the carrying value of a property at the time of acquisition is charged against the allowance for loan losses. Any subsequent valuation adjustments to reflect declines in current fair value, as well as gains or losses on disposition are reported in gain/(loss) on OREO, net in the consolidated statements of operations. Expenses incurred for holding or maintaining OREO properties such as real estate taxes, utilities, and insurance are charged as incurred to other operating expenses in the consolidated statements of operations. Rental income earned, although generally minimal, is offset against other operating expenses. Premises and Equipment Premises and equipment consists of leasehold improvements, furniture, fixtures, equipment, art, buildings, and land. Equipment consists primarily of computer equipment. Premises and equipment are carried at cost, less accumulated depreciation and amortization. Depreciation and amortization are computed primarily by the straight-line method over the estimated useful lives of the assets, or the terms of the leases, if shorter, for leasehold improvements. The estimated useful lives for leasehold improvements and buildings are 5-15 years and 40 years, respectively. The estimated useful life for furniture and fixtures is 2-10 years and is 3-5 years for computer equipment. The costs of improvements that extend the life of an asset are capitalized, while the cost of repairs and maintenance are expensed as incurred. Neither land nor art are depreciated. Valuation of Goodwill/Intangible Assets and Analysis for Impairment The Company allocates the cost of an acquired entity to the assets acquired and liabilities assumed based on their estimated fair values at the date of acquisition. Other intangible assets identified in acquisitions generally consist of advisory contracts, trade names, and non-compete agreements. The value attributed to advisory contracts is based on the time period over which they are expected to generate economic benefits. The advisory contracts are generally amortized over 8-15 years, depending on the contract. Trade names are not amortized. Non-compete agreements are valued based on the expected receipt of future economic benefits protected by clauses in the non-compete agreements that restrict competitive behavior. Non-compete agreements are amortized over the expected life of the agreement, which is generally seven years. The Company’s non-compete agreements became fully amortized during 2013. Long-lived intangible assets are subject to the impairment provisions of ASC 360-10, Property, Plant, and Equipment (“ASC 360”). Long-lived intangible assets are tested for recoverability by comparing the net carrying value of the asset or asset group to the undiscounted net cash flows to be generated from the use and eventual disposition of that asset (asset group) when events or changes in circumstances indicate that its carrying amount may not be recoverable. If the carrying amount of the asset exceeds its net undiscounted cash flows, then an impairment loss is recognized for the amount by which the carrying amount exceeds its fair value, determined based upon the discounted value of the expected cash flows generated by the asset. The intangible impairment test is performed at the reporting unit level, and each affiliate with goodwill and/or intangible assets is considered a reporting unit for goodwill and intangible impairment testing purposes. The excess of the purchase price for acquisitions over the fair value of the net assets acquired, including other intangible assets, is recorded as goodwill. Goodwill is not amortized but is tested for impairment at the reporting unit level, defined as the affiliate level, at least annually in the fourth quarter or more frequently when events or circumstances occur that indicate that it is more likely than not that an impairment has occurred, based on the guidance in ASC 350, Intangibles-Goodwill and Other (“ASC 350”). Goodwill impairment exists when a reporting unit’s carrying value of goodwill exceeds its implied fair value. In accordance with ASC 350, intangible assets with an indefinite useful economic life are not amortized, but are subject to impairment testing at the reporting unit on an annual basis, or when events or changes in circumstances indicate that the carrying amounts are impaired. An entity may assess qualitative factors to determine whether it is more likely than not (that is, a likelihood of more than 50 percent) that the fair value of a reporting unit is less than its carrying amount, including goodwill (“Step 0”). In evaluating whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount, an entity assesses relevant events and circumstances, such as the following: • Macroeconomic conditions such as a deterioration in general economic conditions, limitations on accessing capital, or other developments in equity and credit markets. • Industry and market considerations such as a deterioration in the environment in which an entity operates, an increased competitive environment, a decline in market-dependent multiples or metrics (consider in both absolute terms and relative to peers), a change in the market for an entity’s products or services, or a regulatory or political development. • Overall financial performance such as negative or declining cash flows or a decline in actual or planned revenue or earnings compared with actual and projected results of relevant prior periods. • Other relevant entity-specific events such as changes in management, key personnel, strategy, or customers; contemplation of bankruptcy; or litigation. • Events affecting a reporting unit such as a change in the composition or carrying amount of its net assets, a more-likely-than-not expectation of selling or disposing all, or a portion, of a reporting unit, the testing for recoverability of a significant asset group within a reporting unit, or recognition of a goodwill impairment loss in the financial statements of a subsidiary that is a component of a reporting unit. If, after assessing the totality of events or circumstances such as those described in the preceding paragraph, an entity determines that it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, then the first and second steps of the goodwill impairment test, as described below, are unnecessary. Goodwill is tested for impairment using a two-step process that begins with an estimation of the fair value of a reporting unit. Significant judg

Restructuring

Restructuring	12 Months Ended
	Dec. 31, 2015
Restructuring and Related Activities [Abstract]
Restructuring and Related Activities Disclosure [Text Block]	RESTRUCTURING On May 27, 2011, the Company completed the merger of its four private banks, operating in the New England, San Francisco Bay, Southern California and Pacific Northwest markets, under a single Massachusetts charter. During this period of restructuring, the Company sought to reduce expenses by simplifying the portfolio businesses and streamlining the Holding Company structure, while incurring certain merger-related expenses such as severance charges, costs to terminate contracts, legal, audit and consulting costs, and other costs. The Company had substantially completed the merger-related restructuring as planned in the first half of 2012. During the second half of 2012, the Company implemented a senior executive restructuring at the Holding Company and Bank. The purpose of this restructuring was to create a more streamlined organization and to refine the Company’s cost base. To implement the new structure, the Company incurred an additional severance charge of $ 4.8 million , all during the second half of 2012. The Company expects no additional severance charges associated with this initiative. In the fourth quarter of 2014, the Company incurred restructuring charges related to the acquisition of Banyan. The purpose of this restructuring was to realign the management structure within the Wealth Management and Trust segment. The total cost of the restructuring incurred in Q4 2014 was $0.7 million . In 2015, the Company incurred additional restructuring charges to further refine the management structure within the Wealth Management and Trust Segment. The total cost of the restructuring charges in 2015 was $3.7 million . The Company may incur additional restructuring costs related to this plan but, as of the date of this filing, has not specifically identified or estimated such costs. Restructuring expenses incurred since the plans of restructuring were first implemented in 2011 totaled $18.4 million , with the Private Banking segment incurring $9.5 million , the Wealth Management segment incurring $4.4 million and the remaining $4.5 million incurred by the Holding Company. The following table presents a summary of the restructuring activity for the years ended December 31, 2015, 2014 and 2013. Severance Charges (1) Contract Termination Fees Professional Expenses Other Associated Costs Total (In thousands) Accrued charges at December 31, 2012 $ 3,517 $ 98 $ 8 $ — $ 3,623 Costs paid (3,481 ) — (8 ) — (3,489 ) Adjustments (3 ) (98 ) — — (101 ) Accrued charges at December 31, 2013 33 — — — 33 Costs incurred 739 — — — 739 Costs paid (33 ) — — — (33 ) Accrued charges at December 31, 2014 739 — — — 739 Costs incurred 3,434 — — 290 3,724 Costs paid (868 ) — — (290 ) (1,158 ) Accrued charges at December 31, 2015 $ 3,305 $ — $ — $ — $ 3,305 ___________________ (1) In addition to salary costs, severance charges may include costs related to acceleration of stock awards, outplacement services, and medical benefits.

Acquisitions, Asset Sales, and

Acquisitions, Asset Sales, and Divestitures	12 Months Ended
	Dec. 31, 2015
DIVESTITURES AND ACQUISITIONS [Abstract]
Discontinued Operations and Business Combinations Disclosure [Text Block]	ACQUISITIONS, ASSET SALES, AND DIVESTITURES Acquisitions On October 2, 2014 , the Bank completed the acquisition of Banyan, a registered investment advisory firm headquartered in Palm Beach Gardens, Florida. At the time of acquisition, Banyan had approximately $4.3 billion in client assets and locations in New England; South Florida; Texas; California; Atlanta, Georgia; and Madison, Wisconsin. In the transaction, Boston Private Bank acquired 100% of certain assets and liabilities of Banyan through the issuance of approximately 1.7 million shares of the Company’s stock, valued at $21.0 million , and $43.9 million in cash payments to Banyan shareholders, including $5.0 million in a holdback account for potential future claims. The total purchase price, including contingent consideration of $2.0 million , was $66.9 million . In 2015, due to the lower than initially estimated actual financial results for 2015 and projected financial results for 2016, the $2.0 million liability for the contingent consideration was reversed and recorded as Other Income. 2016 is the last year of any contingent consideration and the Company believes it is unlikely that the contractual minimum targets for any contingent payments will be met. Goodwill of $41.9 million was recorded as a result of the transaction. Goodwill of $39.9 million is expected to be deductible for tax purposes, representing all of the goodwill except for the portion associated with the reversal of the contingent consideration. Intangible assets for advisory contracts of $23.9 million were also recorded and are expected to be amortized over 10 years . The rationale for the transaction was that by merging Banyan with the existing Boston Private Bank wealth management business, additional technical expertise and financial acumen would be generated. Banyan has been merged with the existing wealth management business from Boston Private Bank, and the combined company has been renamed Boston Private Wealth. As a wholly-owned subsidiary of the Bank, Boston Private Wealth will also operate as part of the Wealth Management and Trust segment along with the trust operations of the Bank. These operations are reported separately from the Private Banking operations of the Bank. Divestitures In 2009, the Company divested its interests in Westfield Capital Management Company, LP, formerly known as Westfield Capital Management Company, LLC (“Westfield”). While the Company will continue to have no significant involvement or influence on Westfield, it retains a 12.5% share in Westfield’s revenues (up to an annual maximum of $11.6 million) through December 2017 subject to certain conditions. The Company defers gains related to these payments until determinable. Such revenue share payments are included in net income from discontinued operations in the consolidated statements of operations for the period in which the revenue is recognized.

Investments

Investments	12 Months Ended
	Dec. 31, 2015
Investments [Abstract]
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]	INVESTMENT SECURITIES The following table presents a summary of investment securities: Amortized Cost Unrealized Fair Value Gains Losses (In thousands) At December 31, 2015: Available-for-sale securities at fair value: U.S. government and agencies $ 21,214 $ 64 $ (27 ) $ 21,251 Government-sponsored entities 345,033 874 (1,345 ) 344,562 Municipal bonds 263,661 5,099 (116 ) 268,644 Mortgage-backed securities (1) 431,446 1,329 (5,734 ) 427,041 Other 22,751 268 (7 ) 23,012 Total $ 1,084,105 $ 7,634 $ (7,229 ) $ 1,084,510 Held-to-maturity securities at amortized cost: Mortgage-backed securities (1) $ 116,352 $ 294 $ (262 ) $ 116,384 Total $ 116,352 $ 294 $ (262 ) $ 116,384 At December 31, 2014: Available-for-sale securities at fair value: U.S. government and agencies $ 16,894 $ 32 $ (44 ) $ 16,882 Government-sponsored entities 273,538 983 (268 ) 274,253 Municipal bonds 232,415 3,268 (435 ) 235,248 Mortgage-backed securities (1) 284,403 2,191 (2,890 ) 283,704 Other 19,608 309 (11 ) 19,906 Total $ 826,858 $ 6,783 $ (3,648 ) $ 829,993 Held-to-maturity securities at amortized cost: Mortgage-backed securities (1) $ 140,727 $ 1,638 $ (26 ) $ 142,339 Total $ 140,727 $ 1,638 $ (26 ) $ 142,339 _________________ (1) All mortgage-backed securities are guaranteed by U.S. government agencies or Government-sponsored entities. In the tables below, the weighted average yield is calculated based on average amortized cost which does not include the effect of unrealized changes in fair value. Certain securities are callable before their final maturity. Additionally, certain securities (such as mortgage-backed securities) are shown within the table below based on their final (contractual) maturity, but, due to prepayments, are expected to have shorter lives. The following table presents the maturities of available-for-sale investment securities, based on contractual maturity, and the weighted average yields of such securities as of December 31, 2015 : U.S. government and agencies (1) Government-sponsored entities (1) Amortized cost Fair value Weighted average yield Amortized cost Fair value Weighted average yield (In thousands) Within one year $ — $ — — % $ 19,324 $ 19,336 0.86 % After one, but within five years 21,214 21,251 1.63 % 250,526 251,018 1.51 % After five, but within ten years — — — % 75,183 74,208 1.94 % Greater than ten years — — — % — — — % Total $ 21,214 $ 21,251 1.63 % $ 345,033 $ 344,562 1.57 % Municipal bonds (1) Mortgage-backed securities (2) Amortized cost Fair value Weighted average yield (3) Amortized cost Fair value Weighted average yield (In thousands) Within one year $ 21,153 $ 21,237 2.10 % $ — $ — — % After one, but within five years 92,649 93,316 2.14 % 3,087 3,118 2.44 % After five, but within ten years 41,403 42,074 2.99 % 20,591 21,109 3.14 % Greater than ten years 108,456 112,017 4.28 % 407,768 402,814 2.02 % Total $ 263,661 $ 268,644 3.15 % $ 431,446 $ 427,041 2.08 % Other (4) Amortized cost Fair value Weighted average yield (In thousands) Within one year $ 22,751 $ 23,012 — % After one, but within five years — — — % After five, but within ten years — — — % Greater than ten years — — — % Total $ 22,751 $ 23,012 — % The following table presents the maturities of held-to-maturity investment securities, based on contractual maturity, and the weighted average yields of such securities as of December 31, 2015 : Mortgage-backed securities (2) Amortized cost Fair value Weighted average yield (In thousands) Within one year $ — $ — — % After one, but within five years — — — % After five, but within ten years — — — % Greater than ten years 116,352 116,384 2.26 % Total $ 116,352 $ 116,384 2.26 % ___________________ (1) Certain securities are callable before their final maturity. (2) Mortgage-backed securities are shown based on their final (contractual) maturity, but, due to prepayments, they are expected to have shorter lives. (3) Yield shown on a fully taxable equivalent (“FTE”) basis. (4) Other securities consist of money market mutual funds and equity securities held at certain Wealth Advisory and Investment Management businesses. The weighted average remaining maturity at December 31, 2015 was 9.9 years for available-for-sale investment securities, with $199.5 million of available-for-sale investment securities callable before maturity. The weighted average remaining maturity at December 31, 2014 was 9.2 years for available-for-sale investment securities, with $185.2 million of available-for-sale investment securities callable before maturity. The weighted average remaining maturity for held-to-maturity investment securities was 13.8 years and 14.8 years at December 31, 2015 and December 31, 2014 , respectively. The following table presents the proceeds from sales, gross realized gains and gross realized losses for available-for-sale investment securities that were sold during the following years: Year Ended December 31, 2015 2014 2013 (In thousands) Proceeds from sales $ 34,160 $ 6,450 $ 4,062 Realized gains 272 16 49 Realized losses (36 ) (23 ) — The following table presents information regarding securities at December 31, 2015 and 2014 having temporary impairment, due to the fair values having declined below the amortized cost of the individual securities, and the time period that the investments have been temporarily impaired. Less than 12 months 12 months or longer Total Fair value Unrealized losses Fair value Unrealized losses Fair value Unrealized losses # of securities (In thousands, except number of securities) December 31, 2015 Available-for-sale securities U.S. government and agencies $ 4,935 $ (18 ) $ 1,001 $ (9 ) $ 5,936 $ (27 ) 3 Government-sponsored entities 167,691 (1,345 ) — — 167,691 (1,345 ) 24 Municipal bonds 14,483 (43 ) 3,173 (73 ) 17,656 (116 ) 12 Mortgage-backed securities (1) 318,156 (3,486 ) 62,753 (2,248 ) 380,909 (5,734 ) 68 Other 47 (4 ) 11 (3 ) 58 (7 ) 6 Total $ 505,312 $ (4,896 ) $ 66,938 $ (2,333 ) $ 572,250 $ (7,229 ) 113 Held-to-maturity securities Mortgage-backed securities (1) $ 40,606 $ (262 ) $ — $ — $ 40,606 $ (262 ) 5 Total $ 40,606 $ (262 ) $ — $ — $ 40,606 $ (262 ) 5 Less than 12 months 12 months or longer Total Fair value Unrealized losses Fair value Unrealized losses Fair value Unrealized losses # of securities (In thousands, except number of securities) December 31, 2014 Available-for-sale securities U.S. government and agencies $ 10,364 $ (4 ) $ 632 $ (40 ) $ 10,996 $ (44 ) 2 Government-sponsored entities 51,980 (99 ) 28,957 (169 ) 80,937 (268 ) 8 Municipal bonds 62,871 (255 ) 15,473 (180 ) 78,344 (435 ) 41 Mortgage-backed securities (1) 56,711 (192 ) 91,133 (2,698 ) 147,844 (2,890 ) 34 Other 74 (11 ) — — 74 (11 ) 7 Total $ 182,000 $ (561 ) $ 136,195 $ (3,087 ) $ 318,195 $ (3,648 ) 92 Held-to-maturity securities Mortgage-backed securities (1) $ 13,871 $ (26 ) $ — $ — $ 13,871 $ (26 ) 1 Total $ 13,871 $ (26 ) $ — $ — $ 13,871 $ (26 ) 1 ___________________ (1) All mortgage-backed securities are guaranteed by U.S. government agencies or Government-sponsored entities. The U.S. government and agencies securities, government-sponsored entities securities, and mortgage-backed securities in the table above had Standard and Poor’s credit ratings of AA+. The municipal bonds in the table above had Standard and Poor’s credit ratings of AA-. The other securities consisted of equity securities. At December 31, 2015 , the Company does not consider these investments other-than-temporarily impaired because the decline in fair value on investments is primarily attributed to changes in interest rates and not credit quality. At December 31, 2015 and 2014 , the amount of investment securities in an unrealized loss position greater than 12 months, as well as in total, was primarily due to changes in interest rates. The Company has no intent to sell any securities in an unrealized loss position at December 31, 2015 and it is not more likely than not that the Company would be forced to sell any of these securities prior to the full recovery of all unrealized loss amounts. Subsequent to December 31, 2015 and through the date of the filing of this Annual Report on Form 10-K, no securities were downgraded to below investment grade, nor were any securities in an unrealized loss position sold. Cost method investments, which are included in other assets, can be temporarily impaired when the fair values decline below the amortized costs of the individual investments. There were no cost method investments with unrealized losses at December 31, 2015 or December 31, 2014 . The Company invests primarily in low income housing partnerships which generate tax credits. The Company also holds partnership interests in venture capital funds formed to provide financing to small businesses and to promote community development. The Company had $27.7 million and $27.0 million in cost method investments included in other assets as of December 31, 2015 and December 31, 2014 , respectively. The following table presents the concentration of securities with any one issuer that exceeds ten percent of shareholders’ equity as of December 31, 2015 : Amortized cost Fair value (In thousands) Government National Mortgage Association $ 111,340 $ 109,627 Federal Home Loan Mortgage Corporation 171,582 171,450 Federal Home Loan Bank 103,806 103,251 Federal National Mortgage Association 368,690 366,356 Total $ 755,418 $ 750,684

Loans Receivable and Credit Qua

Loans Receivable and Credit Quality	12 Months Ended
	Dec. 31, 2015
Loans Receivable [Abstract]
Financing Receivables [Text Block]	LOAN PORTFOLIO AND CREDIT QUALITY The Bank’s lending activities are conducted principally in the regions of New England, San Francisco Bay, and Southern California. The Bank originates single and multi-family residential loans, commercial real estate loans, commercial and industrial loans, construction and land loans, and home equity and other consumer loans. Most loans are secured by borrowers’ personal or business assets. The ability of the Bank’s single family residential and consumer borrowers to honor their repayment commitments is generally dependent on the level of overall economic conditions within the Bank’s lending areas. Commercial, construction, and land borrowers’ ability to repay is generally dependent upon the health of the economy and real estate values, including, in particular, the performance of the construction sector. Accordingly, the ultimate collectability of a substantial portion of the Bank’s loan portfolio is susceptible to changing conditions in the New England, San Francisco Bay, and Southern California economies and real estate markets. Total loans include deferred loan origination (fees)/ costs, net, of $5.6 million and $5.4 million as of December 31, 2015 and 2014 , respectively. Mortgage loans serviced for others totaled $79.7 million and $93.8 million as of December 31, 2015 and 2014 , respectively, and are not included in the Company’s total loans. In 2014, the Bank transferred $57.0 million of commercial real estate loans from its loan portfolio to the loans held for sale category, which subsequently sold for a for a $1.6 million gain. In 2013, the Bank transferred $9.1 million of residential loans from its loan portfolio to the loans held for sale category, which subsequently sold for a $0.2 million net gain. The following table presents a summary of the loan portfolio based on the portfolio segment as of the dates indicated: December 31, 2015 December 31, 2014 (In thousands) Commercial and industrial $ 1,111,555 $ 953,085 Commercial real estate 1,914,134 1,788,403 Construction and land 183,434 125,349 Residential 2,229,540 2,132,095 Home equity 119,828 114,859 Consumer and other 160,721 156,145 Total Loans $ 5,719,212 $ 5,269,936 The following table presents nonaccrual loans receivable by class of receivable as of the dates indicated: December 31, 2015 December 31, 2014 (In thousands) Commercial and industrial $ 1,019 $ 2,129 Commercial real estate 11,232 18,485 Construction and land 3,297 11,422 Residential 9,661 9,713 Home equity 1,306 1,320 Consumer and other 56 1,113 Total $ 26,571 $ 44,182 The Bank’s policy is to discontinue the accrual of interest on a loan when the collectability of principal or interest is in doubt. In certain instances, although infrequent, loans that have become 90 days or more past due may remain on accrual status if the value of the collateral securing the loan is sufficient to cover principal and interest and the loan is in the process of collection. There were no loans 90 days or more past due, but still accruing, as of December 31, 2015 and 2014 . The Bank’s policy for returning a loan to accrual status requires the loan to be brought current and for the client to show a history of making timely payments (generally six consecutive months). For TDRs, a return to accrual status generally requires timely payments for a period of six months in accordance with the restructured loan terms, along with meeting other criteria. The following tables present the payment status of loans receivable by class of receivable as of the dates indicated: December 31, 2015 Accruing Past Due Nonaccrual Loans 30-59 Days Past Due 60-89 Days Past Due Total Accruing Past Due Current Payment Status 30-89 Days Past Due 90 Days or Greater Past Due Total Non- accrual Loans Current Accruing Loans Total Loans Receivable (In thousands) Commercial and industrial $ 2,329 $ 338 $ 2,667 $ 726 $ — $ 293 $ 1,019 $ 1,107,869 $ 1,111,555 Commercial real estate 2,091 529 2,620 5,912 — 5,320 11,232 1,900,282 1,914,134 Construction and land — — — 149 34 3,114 3,297 180,137 183,434 Residential 6,267 873 7,140 924 874 7,863 9,661 2,212,739 2,229,540 Home equity 40 — 40 217 — 1,089 1,306 118,482 119,828 Consumer and other 235 392 627 24 9 23 56 160,038 160,721 Total $ 10,962 $ 2,132 $ 13,094 $ 7,952 $ 917 $ 17,702 $ 26,571 $ 5,679,547 $ 5,719,212 December 31, 2014 Accruing Past Due Nonaccrual Loans 30-59 Days Past Due 60-89 Days Past Due Total Accruing Past Due Current Payment Status 30-89 Days Past Due 90 Days or Greater Past Due Total Non- accrual Loans Current Accruing Loans Total Loans Receivable (In thousands) Commercial and industrial $ 723 $ — $ 723 $ 157 $ — $ 1,972 $ 2,129 $ 950,233 $ 953,085 Commercial real estate 167 71 238 14,235 684 3,566 18,485 1,769,680 1,788,403 Construction and land — — — 8,245 86 3,091 11,422 113,927 125,349 Residential 3,878 1,913 5,791 2,770 1,704 5,239 9,713 2,116,591 2,132,095 Home equity — — — 98 — 1,222 1,320 113,539 114,859 Consumer and other 208 — 208 1,041 9 63 1,113 154,824 156,145 Total $ 4,976 $ 1,984 $ 6,960 $ 26,546 $ 2,483 $ 15,153 $ 44,182 $ 5,218,794 $ 5,269,936 Nonaccrual and delinquent loans are affected by many factors, such as economic and business conditions, interest rates, unemployment levels, and real estate collateral values, among others. In periods of prolonged economic decline, borrowers may become more severely affected over time as liquidity levels decline and the borrower’s ability to continue to make payments deteriorates. With respect to real estate collateral values, the declines from the peak, as well as the value of the real estate at the time of origination versus the current value, can impact the level of problem loans. For instance, if the loan to value ratio at the time of renewal has increased due to the decline in the real estate value since origination, the loan may no longer meet the Bank’s underwriting standards and may be considered for classification as a problem loan dependent upon a review of risk factors. Generally when a collateral dependent loan becomes impaired, an updated appraisal of the collateral, if appropriate, is obtained. If the impaired loan has not been upgraded to a performing status within a reasonable amount of time, the Bank will continue to obtain updated appraisals as deemed necessary, especially during periods of declining property values. The past due status of a loan is determined in accordance with its contractual repayment terms. All loan types are reported past due when one scheduled payment is due and unpaid for 30 days or more. The following tables present the loan portfolio’s credit risk profile by internally assigned grade and class of receivable as of the dates indicated: December 31, 2015 By Loan Grade or Nonaccrual Status Pass Special Mention Accruing Substandard Nonaccrual Loans Total (In thousands) Commercial and industrial $ 1,070,438 $ 28,643 $ 11,455 $ 1,019 $ 1,111,555 Commercial real estate 1,841,603 27,594 33,705 11,232 1,914,134 Construction and land 162,563 12,974 4,600 3,297 183,434 Residential 2,213,204 — 6,675 9,661 2,229,540 Home equity 118,522 — — 1,306 119,828 Consumer and other 158,686 — 1,979 56 160,721 Total $ 5,565,016 $ 69,211 $ 58,414 $ 26,571 $ 5,719,212 December 31, 2014 By Loan Grade or Nonaccrual Status Pass Special Mention Accruing Substandard Nonaccrual Loans Total (In thousands) Commercial and industrial $ 928,228 $ 15,703 $ 7,025 $ 2,129 $ 953,085 Commercial real estate 1,703,064 47,782 19,072 18,485 1,788,403 Construction and land 100,672 13,255 — 11,422 125,349 Residential 2,112,129 — 10,253 9,713 2,132,095 Home equity 113,017 — 522 1,320 114,859 Consumer and other 153,044 — 1,988 1,113 156,145 Total $ 5,110,154 $ 76,740 $ 38,860 $ 44,182 $ 5,269,936 The following tables present, by class of receivable, the balance of impaired loans with and without a related allowance, the associated allowance for those impaired loans with a related allowance, and the total unpaid principal on impaired loans: As of and for the year ended December 31, 2015 Recorded Investment (1) Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized while Impaired (In thousands) With no related allowance recorded: Commercial and industrial $ 2,259 $ 2,569 n/a $ 1,638 $ 836 Commercial real estate 12,116 20,113 n/a 17,885 1,494 Construction and land 1,097 2,132 n/a 3,027 92 Residential 7,788 8,576 n/a 9,384 269 Home equity — — n/a 42 2 Consumer and other — — n/a 545 61 Subtotal $ 23,260 $ 33,390 n/a $ 32,521 $ 2,754 With an allowance recorded: Commercial and industrial $ 15 $ 15 $ 270 $ 657 $ 66 Commercial real estate 7,346 7,775 713 8,749 385 Construction and land 2,200 2,356 172 2,200 — Residential 6,351 6,966 474 6,940 186 Home equity — — — — — Consumer and other — — — — — Subtotal $ 15,912 $ 17,112 $ 1,629 $ 18,546 $ 637 Total: Commercial and industrial $ 2,274 $ 2,584 $ 270 $ 2,295 $ 902 Commercial real estate 19,462 27,888 713 26,634 1,879 Construction and land 3,297 4,488 172 5,227 92 Residential 14,139 15,542 474 16,324 455 Home equity — — — 42 2 Consumer and other — — — 545 61 Total $ 39,172 $ 50,502 $ 1,629 $ 51,067 $ 3,391 ___________________ (1) Recorded investment represents the client loan balance net of historical charge-offs and historical nonaccrual interest paid, which was applied to principal. As of and for the year ended December 31, 2014 Recorded Investment (1) Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized while Impaired (In thousands) With no related allowance recorded: Commercial and industrial $ 2,011 $ 3,095 n/a $ 2,055 $ 28 Commercial real estate 21,500 28,700 n/a 24,921 2,483 Construction and land 9,221 11,133 n/a 1,597 — Residential 9,650 10,788 n/a 9,221 406 Home equity 50 50 n/a 50 3 Consumer and other 1,006 1,007 n/a 546 1 Subtotal $ 43,438 $ 54,773 n/a $ 38,390 $ 2,921 With an allowance recorded: Commercial and industrial $ 891 $ 954 $ 91 $ 1,111 $ 99 Commercial real estate 9,065 9,493 2,592 7,925 379 Construction and land 2,200 2,356 172 2,545 — Residential 6,749 6,749 1,330 7,742 219 Home equity — — — — — Consumer and other — — — — — Subtotal $ 18,905 $ 19,552 $ 4,185 $ 19,323 $ 697 Total: Commercial and industrial $ 2,902 $ 4,049 $ 91 $ 3,166 $ 127 Commercial real estate 30,565 38,193 2,592 32,846 2,862 Construction and land 11,421 13,489 172 4,142 — Residential 16,399 17,537 1,330 16,963 625 Home equity 50 50 — 50 3 Consumer and other 1,006 1,007 — 546 1 Total $ 62,343 $ 74,325 $ 4,185 $ 57,713 $ 3,618 ____________________ (1) Recorded investment represents the client loan balance net of historical charge-offs and historical nonaccrual interest paid, which was applied to principal. When management determines that it is probable that the Bank will not collect all principal and interest on a loan in accordance with the original loan terms, the loan is designated as impaired. Loans that are designated as impaired require an analysis to determine the amount of impairment, if any. Impairment would be indicated as a result of the carrying value of the loan exceeding the estimated collateral value, less costs to sell, for collateral dependent loans or the net present value of the projected cash flow, discounted at the loan’s contractual effective interest rate, for loans not considered to be collateral dependent. Generally, shortfalls in the analysis on collateral dependent loans would result in the impairment amount being charged-off to the allowance for loan losses. Shortfalls on cash flow dependent loans may be carried as specific allocations to the general reserve unless a known loss is determined to have occurred, in which case such known loss is charged-off. Loans in the held for sale category are carried at the lower of amortized cost or estimated fair value in the aggregate and are excluded from the allowance for loan losses analysis. The Bank may, under certain circumstances, restructure loans as a concession to borrowers who are experiencing financial difficulty. Such loans are classified as TDRs and are included in impaired loans. TDRs typically result from the Bank’s loss mitigation activities which, among other things, could include rate reductions, payment extensions, and/or principal forgiveness. As of December 31, 2015 and 2014 , TDRs totaled $30.6 million and $44.8 million , respectively. As of December 31, 2015 , $18.6 million of the $30.6 million of TDRs were on accrual status. As of December 31, 2014 , $24.3 million of the $44.8 million of TDRs were on accrual status. As of December 31, 2015 and 2014, the Company had no commitments and $0.3 million , respectively, in commitments to lend additional funds to debtors for loans whose terms had been modified in a troubled debt restructuring. Since all TDR loans are considered impaired loans, they are individually evaluated for impairment. The resulting impairment, if any, would have an impact on the allowance for loan losses as a specific reserve or charge-off. If, prior to the classification as a TDR, the loan was not impaired, there would have been a general or allocated reserve on the particular loan. Therefore, depending upon the result of the impairment analysis, there could be an increase or decrease in the related allowance for loan losses. Many loans initially categorized as TDRs are already on nonaccrual status and are already considered impaired. Therefore, there is generally not a material change to the allowance for loan losses when a nonaccruing loan is categorized as a TDR. The following tables present the balance of TDRs that were restructured or defaulted during the periods indicated: As of and for the year ended December 31, 2015 Restructured Year to Date TDRs that defaulted in 2015 that were restructured in a TDR in 2015. # of Loans Pre-modification recorded investment Post-modification recorded investment # of Loans Post-modification recorded investment (In thousands, except number of loans) Commercial and industrial 1 $ 1,298 $ 1,304 — $ — Commercial real estate 2 4,850 4,838 1 3,701 Construction and land — — — — — Residential 8 513 516 — — Home equity — — — — — Consumer and other — — — — — Total 11 $ 6,661 $ 6,658 1 $ 3,701 As of and for the year ended December 31, 2015 Extension of Term Temporary Rate Reduction Payment Deferral Combination of Concessions (1) Total Concessions # of Loans Post- modifi- cation recorded invest- ment # of Loans Post- # of Loans Post- # of Loans Post- # of Loans Post- (In thousands, except number of loans) Commercial and Industrial — $ — — $ — — $ — 1 $ 1,304 1 $ 1,304 Commercial real estate 1 4,118 — — — — 1 720 2 4,838 Construction and Land — — — — — — — — — — Residential — — 7 491 1 25 — — 8 516 Home Equity — — — — — — — — — — Consumer and other — — — — — — — — — — ____________________ (1) Combination of concessions includes loans that have had more than one modification, including extension of term, temporary reduction of interest rate, and/or payment deferral. As of and for the year ended December 31, 2014 Restructured Year to Date TDRs that defaulted in 2014 that were restructured in a TDR in 2014. # of Loans Pre-modification recorded investment Post-modification recorded investment # of Loans Post-modification recorded investment (In thousands, except number of loans) Commercial and industrial — $ — $ — — $ — Commercial real estate 1 189 189 — — Construction and land 2 8,782 7,882 — — Residential 3 287 296 4 663 Home equity — — — — — Consumer and other 1 1,000 1,000 — — Total 7 $ 10,258 $ 9,367 4 $ 663 As of and for the year ended December 31, 2014 Extension of Term Temporary Rate Reduction Payment Deferral Combination of Concessions (1) Total Concessions # of Loans Post- # of Loans Post- # of Loans Post- # of Loans Post- # of Loans Post- (In thousands, except number of loans) Commercial and Industrial — $ — — $ — — $ — — $ — — $ — Commercial real estate 1 189 — — — — — — 1 189 Construction and Land 2 7,882 — — — — — — 2 7,882 Residential — — 3 296 — — — — 3 296 Home Equity — — — — — — — — — — Consumer and other 1 1,000 — — — — — — 1 1,000 ____________________ (1) Combination of concessions includes loans that have had more than one modification, including extension of term, temporary reduction of interest rate, and/or payment deferral. Any loans to senior management, executive officers, and directors are made in the ordinary course of business, under normal credit terms, including interest rates and collateral requirements prevailing at the time of origination for comparable transactions with other persons and do not represent more than normal credit risk. The Bank’s current policy is generally not to originate these types of loans. At December 31, 2015 , the Bank had two loans outstanding with a combined carrying value of $17.0 million to a company whose managing principal is the spouse of an executive officer of the Company. These loans were made in the ordinary course of business, under normal credit terms, and include interest rates and collateral requirements prevailing at the time of origination for comparable transactions with other persons and do not represent more than normal credit risk. One of these loans was originated prior to the executive officer’s employment with the Company, and the other loan was in the process of being originated when the executive officer started with the Company. At December 31, 2014 , the Company had no loans outstanding to senior management, executive officers, and directors.

Allowance for Loan Losses

Allowance for Loan Losses	12 Months Ended
	Dec. 31, 2015
Allowance for Loan Losses [Abstract]
Allowance for Credit Losses [Text Block]	ALLOWANCE FOR LOAN LOSSES The allowance for loan losses is reported as a reduction of outstanding loan balances, and totaled $78.5 million and $75.8 million at December 31, 2015 and 2014 , respectively. The following tables present a summary of the changes in the allowance for loan losses for the periods indicated: As of and for the year ended December 31, 2015 2014 2013 (In thousands) Allowance for loan losses, beginning of year: Commercial and industrial $ 14,114 $ 12,837 $ 11,825 Commercial real estate 43,854 44,979 52,497 Construction and land 4,041 4,465 5,016 Residential 10,374 10,732 10,892 Home equity 1,003 1,020 1,085 Consumer and other 382 322 540 Unallocated 2,070 2,016 2,202 Total allowance for loan losses, beginning of year 75,838 76,371 84,057 Provision/ (credit) for loan losses: Commercial and industrial (518 ) (237 ) 11 Commercial real estate (721 ) (1,940 ) (10,024 ) Construction and land 1,123 (1,905 ) (1,683 ) Residential 342 (2,247 ) 1,824 Home equity 82 (32 ) 271 Consumer and other 207 (93 ) (213 ) Unallocated (1) (2,070 ) 54 (186 ) Total provision/(credit) for loan losses (1,555 ) (6,400 ) (10,000 ) Loans charged-off: Commercial and industrial (253 ) (717 ) (218 ) Commercial real estate (1,400 ) (3,160 ) (2,712 ) Construction and land — (1,100 ) (100 ) Residential (313 ) (263 ) (2,008 ) Home equity — — (360 ) Consumer and other (70 ) (56 ) (19 ) Total charge-offs (2,036 ) (5,296 ) (5,417 ) As of and for the year ended December 31, 2015 2014 2013 (In thousands) Recoveries on loans previously charged-off: Commercial and industrial 2,471 2,231 1,219 Commercial real estate 2,482 3,975 5,218 Construction and land 1,158 2,581 1,232 Residential 141 2,152 24 Home equity — 15 24 Consumer and other 1 209 14 Total recoveries 6,253 11,163 7,731 Allowance for loan losses at December 31 (end of year): Commercial and industrial 15,814 14,114 12,837 Commercial real estate 44,215 43,854 44,979 Construction and land 6,322 4,041 4,465 Residential 10,544 10,374 10,732 Home equity 1,085 1,003 1,020 Consumer and other 520 382 322 Unallocated (1) — 2,070 2,016 Total allowance for loan losses at December 31 (end of year) $ 78,500 $ 75,838 $ 76,371 ____________________ (1) As of December 31, 2015 , the unallocated reserve was allocated to the qualitative factors as part of the general reserves (ASC 450). The allocation had no effect on the 2015 provision/ (credit) for loan losses. The following tables present the Company’s allowance for loan losses and loan portfolio at December 31, 2015 and 2014 by portfolio segment, disaggregated by method of analysis. The Company had no loans acquired with deteriorated credit quality at December 31, 2015 or 2014 . Commercial and industrial Commercial real estate Construction and land Residential (In thousands) Allowance for loan losses balance at December 31, 2015 attributable to: Loans collectively evaluated $ 15,544 $ 43,502 $ 6,150 $ 10,070 Loans individually evaluated 270 713 172 474 Total allowance for loan losses $ 15,814 $ 44,215 $ 6,322 $ 10,544 Recorded investment (loan balance) at December 31, 2015: Loans collectively evaluated $ 1,109,281 $ 1,894,672 $ 180,137 $ 2,215,401 Loans individually evaluated 2,274 19,462 3,297 14,139 Total Loans $ 1,111,555 $ 1,914,134 $ 183,434 $ 2,229,540 Home equity Consumer and other Unallocated Total (Continued from above) (In thousands) Allowance for loan losses balance at December 31, 2015 attributable to: Loans collectively evaluated $ 1,085 $ 520 $ — $ 76,871 Loans individually evaluated — — — 1,629 Total allowance for loan losses $ 1,085 $ 520 $ — $ 78,500 Recorded investment (loan balance) at December 31, 2015: Loans collectively evaluated $ 119,828 $ 160,721 $ — $ 5,680,040 Loans individually evaluated — — — 39,172 Total Loans $ 119,828 $ 160,721 $ — $ 5,719,212 Commercial and industrial Commercial real estate Construction and land Residential (In thousands) Allowance for loan losses balance at December 31, 2014 attributable to: Loans collectively evaluated $ 14,023 $ 41,262 $ 3,869 $ 9,044 Loans individually evaluated 91 2,592 172 1,330 Total allowance for loan losses $ 14,114 $ 43,854 $ 4,041 $ 10,374 Recorded investment (loan balance) at December 31, 2014: Loans collectively evaluated $ 950,183 $ 1,757,839 $ 113,928 $ 2,115,696 Loans individually evaluated 2,902 30,564 11,421 16,399 Total Loans $ 953,085 $ 1,788,403 $ 125,349 $ 2,132,095 Home equity Consumer and other Unallocated Total (Continued from above) (In thousands) Allowance for loan losses balance at December 31, 2014 attributable to: Loans collectively evaluated $ 1,003 $ 382 $ 2,070 $ 71,653 Loans individually evaluated — — — 4,185 Total allowance for loan losses $ 1,003 $ 382 $ 2,070 $ 75,838 Recorded investment (loan balance) at December 31, 2014: Loans collectively evaluated $ 114,809 $ 155,138 $ — $ 5,207,593 Loans individually evaluated 50 1,007 — 62,343 Total Loans $ 114,859 $ 156,145 $ — $ 5,269,936

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2015
PREMISES AND EQUIPMENT [Abstract]
Property, Plant and Equipment Disclosure [Text Block]	PREMISES AND EQUIPMENT Premises and equipment consisted of the following: As of December 31, 2015 2014 (In thousands) Leasehold improvements $ 43,433 $ 41,625 Furniture, fixtures, and equipment 49,039 46,809 Buildings 4,715 4,724 Land 374 374 Subtotal 97,561 93,532 Less: accumulated depreciation and amortization 66,525 61,333 Premises and equipment, net $ 31,036 $ 32,199 Depreciation and amortization expense related to premises and equipment was $6.6 million , $6.5 million , and $6.2 million for the years ended December 31, 2015 , 2014 , and 2013 , respectively. The Company is obligated for minimum payments under non-cancelable operating leases. In accordance with the terms of these leases, the Company is currently committed to minimum annual payments as follows: Minimum lease payments (In thousands) 2016 $ 19,372 2017 16,098 2018 14,998 2019 13,932 2020 13,400 Thereafter 59,090 Total $ 136,890 Additionally, the Company remains a guarantor on a non-cancelable operating lease for a divested affiliate through 2016. The minimum lease payment on this lease is $0.5 million for 2016. Rent expense for the years ended December 31, 2015 , 2014 , and 2013 was $19.0 million , $15.7 million and $14.8 million , respectively.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2015
GOODWILL AND OTHER INTANGIBLE ASSETS [Abstract]
Goodwill and Intangible Assets Disclosure [Text Block]	GOODWILL AND OTHER INTANGIBLE ASSETS Goodwill There were no changes in the carrying value of goodwill during 2015. The following tables details the changes in carrying value of goodwill by segment during the year ended December 31, 2014. Balance at December 31, 2013 Contributions, net Acquisitions Balance at (In thousands) Goodwill Private Banking $ 2,403 $ (2,403 ) $ — $ — Wealth Management and Trust — 2,403 41,902 44,305 Investment Management 66,955 — — 66,955 Wealth Advisory 40,822 — — 40,822 Total goodwill $ 110,180 $ — $ 41,902 $ 152,082 The following tables detail total goodwill and the cumulative impairment charges thereon as of December 31, 2015 and 2014: Goodwill prior to impairment Cumulative goodwill impairment Goodwill (In thousands) Private Banking $ 34,281 $ (34,281 ) $ — Wealth Management and Trust 44,305 — 44,305 Investment Management 117,216 (50,261 ) 66,955 Wealth Advisory 40,822 — 40,822 Total goodwill at December 31, 2015 $ 236,624 $ (84,542 ) $ 152,082 Private Banking $ 34,281 $ (34,281 ) $ — Wealth Management and Trust 44,305 — 44,305 Investment Management 117,216 (50,261 ) 66,955 Wealth Advisory 40,822 — 40,822 Total goodwill at December 31, 2014 $ 236,624 $ (84,542 ) $ 152,082 In 2015, the Company recognized no additional goodwill. In 2014, additional goodwill of $41.9 million was recorded as a result of the acquisition of Banyan. In the fourth quarter of 2014, goodwill of $2.4 million was reclassified from the Private Banking segment to the newly-created Wealth Management and Trust segment. Goodwill and indefinite lived intangible assets such as trade names are subject to annual impairment tests, or more frequently, if there is an indication of impairment, based on the guidance in ASC 350, Intangibles-Goodwill and Other (“ASC 350”). Long-lived intangible assets such as advisory contracts are tested for recoverability whenever events or changes in circumstances indicate that the carrying amount of the asset or asset group may not be recoverable in accordance with ASC 360, Property, Plant, and Equipment (“ASC 360”). Management performed its annual goodwill and indefinite-lived intangible asset impairment testing during the fourth quarters of 2015 and 2014 for applicable reporting units. The estimated fair value for all applicable reporting units exceeded the carrying value, and as a result no impairment was evident. There was no additional testing required for long-lived intangible assets in 2014 or 2015. The 2015 goodwill impairment testing indicated that the reporting units with the closest fair values as compared to carrying value were Anchor and Boston Private Wealth. The estimated fair value of Anchor was $92.0 million as compared to a carrying value of $82.8 million, an excess of $9.2 million, or 11.2%. The estimated fair value of Boston Private Wealth was $85.0 million as compared to a carrying value of $71.5 million, an excess of $13.5 million, or 18.9%. Should recent declines in net outflows of AUM at Anchor and or Boston Private Wealth continue, financial results will be negatively impacted, In addition, the decline in the U.S. equity market in early 2016 will, until recovered, have a further negative impact on AUM even more at these firms. If net outflows at these firms continue and or the U.S. equity market does not recover in the short term, the risk of impairment will increase. In addition to current financial results, other assumptions such as forecasted earnings and market comparisons for these types of firms are used to determine the fair value and whether there is indication of impairment. Material negative changes in the assumptions or inputs in to the valuation models will increase the risk of impairment. The Company will continue to monitor the events and circumstances at these firms for indication of a triggering event that would necessitate impairment testing prior to the usual testing in the fourth quarter. Intangible assets The following table shows the gross and net carrying amounts of identifiable intangible assets at December 31, 2015 and 2014 : 2015 2014 Gross Carrying Amount Accumulated Amortization Net Gross Carrying Amount Accumulated Amortization Net (In thousands) Advisory contracts $ 75,013 $ 44,046 $ 30,967 $ 75,013 $ 37,676 $ 37,337 Employment agreements 3,247 3,247 — 3,247 3,247 — Trade names 2,040 — 2,040 2,040 — 2,040 Mortgage servicing rights 1,380 1,380 — 1,380 1,039 341 Total $ 81,680 $ 48,673 $ 33,007 $ 81,680 $ 41,962 $ 39,718 The Company recognized no additional identifiable intangible assets in 2015. The Company recognized additional identifiable intangible assets of $23.9 million in advisory contracts in 2014 related to the acquisition of Banyan. Boston Private Bank acquired Banyan on October 2, 2014 and allocated approximately $41.9 million of the purchase price to goodwill and $23.9 million to amortizable intangible assets. The intangible assets consist of advisory contracts, including referral networks, and are projected to be amortized over a 10 year period based on the expected economic benefits. See Part I. Item 1. “Notes to Consolidated Financial Statements - Note 3: Acquisitions, Asset sales, and Divestitures” for further details. Consolidated expense related to intangible assets subject to amortization was $6.7 million , $4.8 million , and $4.3 million for 2015 , 2014 , and 2013 , respectively. Management reviews, and adjusts if necessary, intangible asset amortization schedules to ensure that the remaining life on the amortization schedule accurately reflects the useful life of the intangible asset. The weighted average amortization period of these intangible assets is 7.91 years . The estimated annual amortization expense for these identifiable intangibles over the next five years is: Estimated intangible amortization expense (In thousands) 2016 $ 6,282 2017 5,678 2018 4,438 2019 3,508 2020 3,248

Derivatives and Hedging Activit

Derivatives and Hedging Activities	12 Months Ended
	Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Text Block]	DERIVATIVES AND HEDGING ACTIVITIES The Company is exposed to certain risks arising from both its business operations and economic conditions. The Company principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Company manages economic risks, including interest rate, liquidity, and credit risk, primarily by managing the amount, sources, and duration of its assets and liabilities and, to a lesser extent, the use of derivative financial instruments. Specifically, the Company enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the value of which are generally determined by interest rates. The Company’s derivative financial instruments are used to manage differences in the amount, timing, and duration of the Company’s known or expected cash receipts and its known or expected cash payments principally related to certain loans, deposits, and borrowings. The following table presents the fair value of the Company’s derivative financial instruments as well as their classification on the consolidated balance sheets as of December 31, 2015 and 2014 . December 31, 2015 December 31, 2014 Asset derivatives Liability derivatives Asset derivatives Liability derivatives Balance sheet location Fair value (1) Balance sheet location Fair value (1) Balance sheet location Fair value (1) Balance sheet location Fair value (1) (In thousands) Derivatives designated as hedging instruments: Interest rate products Other assets $ — Other liabilities $ (1,907 ) Other assets $ 34 Other liabilities $ (3,352 ) Derivatives not designated as hedging instruments: Interest rate products Other assets 7,960 Other liabilities (8,095 ) Other assets 5,323 Other liabilities (5,434 ) Total $ 7,960 $ (10,002 ) $ 5,357 $ (8,786 ) ___________________ (1) For additional details, see Part II. Item 8. “Financial Statements and Supplementary Data - Note 21: Fair Value of Financial Instruments.” The following table presents the effect of the Company’s derivative financial instruments in the consolidated statement of operations for the years ended December 31, 2015 and 2014 . Derivatives in Cash Flow Hedging Relationships Amount of Gain or (Loss) Recognized in OCI on Derivatives (Effective Portion) Years Ended December 31, Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)Years Ended December 31, 2015 2014 2015 2014 (In thousands) Interest rate products $ (2,642 ) $ (3,425 ) Interest Expense $ (4,052 ) $ (3,198 ) Total $ (2,642 ) $ (3,425 ) $ (4,052 ) $ (3,198 ) The Holding Company had and the Bank has agreements with their derivative counterparties that contain provisions where, if the Holding Company defaulted or the Bank defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then the Holding Company or the Bank could also be declared in default on its derivative obligations. The Bank was in compliance with these provisions as of December 31, 2015 and 2014 . The Holding Company was in compliance with these provisions as of the maturity date of its agreement on December 30, 2015 as well as December 31, 2014. The Holding Company had and the Bank also has agreements with certain of their derivative counterparties that contain provisions where, if the Holding Company failed or the Bank fails to maintain its status as a well- or adequately-capitalized institution, then the counterparty could terminate the derivative positions and the Holding Company or the Bank would be required to settle its obligations under the agreements. The Bank was in compliance with these provisions as of December 31, 2015 and 2014 . The Holding Company was in compliance with these provisions as of the maturity date of its agreement on December 30, 2015 as well as December 31, 2014. Certain of the Holding Company and the Bank’s agreements with their derivative counterparties contain provisions where if specified events or conditions occur that materially change the Holding Company’s or the Bank’s creditworthiness in an adverse manner, the Holding Company or the Bank may be required to fully collateralize their obligations under the derivative instruments. The Bank was in compliance with these provisions as of December 31, 2015 and 2014 . The Holding Company was in compliance with these provisions as of the maturity date of its agreement on December 30, 2015 as well as December 31, 2014. As of December 31, 2015 and 2014 , the termination amounts related to collateral determinations of derivatives in a liability position was $9.7 million and $8.9 million , respectively. The Company has minimum collateral requirements with its derivative counterparties and has posted cash collateral of $2.0 million and $3.7 million , respectively, and pledged securities of $9.8 million and $7.0 million , respectively, as of December 31, 2015 and 2014 , against its obligations under these agreements. Cash Flow Hedges of Interest Rate Risk The Company’s objective in using derivatives is to add stability to interest income and expense and to manage the risk related to exposure to changes in interest rates. To accomplish this objective, the Holding Company entered into an interest rate swap in the second quarter of 2010 with a notional amount of $75 million related to the Holding Company’s cash outflows associated with the subordinated debt related to trust preferred securities to protect against rising London Interbank Offered Rate (“LIBOR”). The interest rate swap had an effective date of December 30, 2010 and a term of 5 years . As of December 30, 2010, the subordinated debt switched from a fixed rate of 6.25% to a variable rate of three-month LIBOR plus 1.68% . The interest rate swap effectively fixed the Holding Company’s interest rate payments on the $75 million of debt at 4.45% . This interest rate swap matured on December 30, 2015 . The Bank also entered into a total of six interest rate swaps, one during 2014 with an effective date of June 1, 2014, and five during 2013 with effective dates of December 1, 2014, September 2, 2014, June 1, 2014, March 1, 2014, and August 1, 2013. The six interest rate swaps each have a notional amount of $25 million and have terms ranging from three to six years. The Bank’s risk management objective and strategy for these interest rate swaps is to reduce its exposure to variability in interest-related cash outflows attributable to changes in the LIBOR swap rate associated with borrowing programs for each of the periods, initially expected to be accomplished with LIBOR-indexed brokered deposits, but may also include LIBOR-indexed FHLB advances. The interest rate swaps will effectively fix the Bank’s interest payments on $150 million of its LIBOR-indexed liabilities at rates between 1.17% and 2.32%, and a weighted average rate of 1.85%. The Company uses the “Hypothetical Derivative Method” described in ASC 815, Derivatives and Hedging (“ASC 815”), for quarterly prospective and retrospective assessments of hedge effectiveness, as well as for measurements of hedge ineffectiveness. Under this method, the Company assesses the effectiveness of each hedging relationship by comparing the changes in cash flows of the derivative hedging instrument with the changes in cash flows of the designated hedged transactions. The effective portion of changes in the fair value of the derivative is initially reported in other comprehensive income (“OCI”) (outside of earnings) and subsequently reclassified to earnings in interest and dividend income when the hedged transactions affect earnings. Ineffectiveness resulting from the hedge is recorded as a gain or loss in the consolidated statement of operations as part of fees and other income. The Company had no hedge ineffectiveness recognized in earnings during the year ended December 31, 2015 and 2014 . The Company also monitors the risk of counterparty default on an ongoing basis. A portion of the balance reported in accumulated other comprehensive income related to derivatives will be reclassified to interest income or expense as interest payments are made or received on the Company’s interest rate swaps. During the next twelve months, the Company estimates that $1.4 million will be reclassified as an increase in interest expense. Non-designated Hedges Derivatives not designated as hedges are not speculative and result from two different services the Bank provides to qualified commercial clients. The Bank offers certain derivative products directly to such clients. The Bank economically hedges derivative transactions executed with commercial clients by entering into mirror-image, offsetting derivatives with third parties. Derivative transactions executed as part of these programs are not designated in ASC 815-qualifying hedging relationships and are, therefore, marked-to-market through earnings each period. Because the derivatives have mirror-image contractual terms, the changes in fair value substantially offset through earnings. Fees earned in connection with the execution of derivatives related to this program are recognized in the consolidated statement of operations in other income. As of December 31, 2015 and 2014 , the Bank had 76 and 24 derivatives related to this program, comprised of interest rate swaps and caps, with an aggregate notional amount of $475.3 million and $238.7 million , respectively. As of December 31, 2015 and 2014, the Bank had no foreign currency exchange contracts outstanding related to this program. In addition, as a participant lender, the Bank has guaranteed performance on a pro-rated portion of a swap executed by another financial institution. As the participant lender, the Bank is providing a partial guarantee, but is not a direct party to the related swap transaction. The Bank has no obligations under the risk participation agreement unless the borrower defaults on their swap transaction with the lead bank and the swap is in a liability position to the borrower. In that instance, the Bank has agreed to pay the lead bank a portion of the swap’s termination value at the time of the default. The derivative transaction entered into as part of this transaction is not designated, as per ASC 815, as a qualifying hedging relationship and is, therefore, marked-to-market through earnings each period. The pro-rated notional amount of this risk participation transaction was $8.3 million as of December 31, 2015. There were no such risk participation transactions as of December 31, 2014. The following table presents the effect of the Company’s derivative financial instruments, not designated as hedging instruments, in the consolidated statements of operations for the years ended December 31, 2015 and 2014 . Derivatives Not Designated as Hedging Instruments Location of Gain or (Loss) Recognized in Income on Derivative Amount of Gain or (Loss), Net, Recognized in Income on Derivative Years Ended December 31, 2015 2014 (In thousands) Interest rate products Other income/(expense) $ (12 ) $ (127 ) Other products (1) Other income/(expense) 44 — Total $ 32 $ (127 ) _________________ (1) Risk Participation Agreement

Deposits

Deposits	12 Months Ended
	Dec. 31, 2015
Deposits [Abstract]
Deposit Liabilities Disclosures [Text Block]	DEPOSITS Deposits are summarized as follows: December 31, 2015 2014 (In thousands) Demand deposits (non-interest bearing) $ 1,689,604 $ 1,418,426 NOW (1) 588,337 549,320 Savings 72,336 71,367 Money market (1) 3,105,172 2,816,928 Certificates of deposit under $100,000 (1) 173,011 185,721 Certificates of deposit $100,000 or greater 411,977 412,117 Total $ 6,040,437 $ 5,453,879 ___________________ (1) Includes brokered deposits. Certificates of deposit had the following schedule of maturities: December 31, 2015 2014 (In thousands) Less than 3 months remaining $ 192,702 $ 171,157 3 to 6 months remaining 136,635 126,109 6 to 12 months remaining 111,674 121,654 1 to 3 years remaining 120,939 120,701 3 to 5 years remaining 22,035 41,706 More than 5 years remaining 1,003 16,511 Total $ 584,988 $ 597,838 Interest expense on certificates of deposit $100,000 or greater was $2.3 million , $2.3 million and $2.4 million for the years ended December 31, 2015 , 2014 , and 2013 , respectively. At December 31, 2015 and 2014 , there was $0.3 million and $0.6 million of overdrawn deposit accounts reclassified to loans, respectively.

Federal Funds Purchased and Sec

Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	12 Months Ended
	Dec. 31, 2015
Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Abstract]
Short-term Debt [Text Block]	FEDERAL FUNDS PURCHASED AND SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE Federal Funds Purchased Securities Sold Under Agreement to Repurchase (In thousands) 2015 Outstanding at end of year $ — $ 58,215 Maximum outstanding at any month-end 102,000 75,313 Average balance for the year 10,008 64,320 Weighted average rate at end of year — % 0.05 % Weighted average rate paid for the year 0.31 % 0.05 % 2014 Outstanding at end of year $ — $ 30,496 Maximum outstanding at any month-end 75,000 154,448 Average balance for the year 1,671 108,191 Weighted average rate at end of year — % 0.05 % Weighted average rate paid for the year 0.33 % 0.05 % 2013 Outstanding at end of year $ — $ 102,353 Maximum outstanding at any month-end 90,000 125,971 Average balance for the year 4,732 102,643 Weighted average rate at end of year — % 0.05 % Weighted average rate paid for the year 0.30 % 0.36 % The federal funds purchased generally mature within 30 days of the transaction date. Repurchase agreements are generally linked to commercial demand deposit accounts with an overnight sweep feature. In a repurchase agreement transaction, the Bank will generally sell an investment security, agreeing to repurchase either the same or a substantially identical security on a specified later date at a price slightly greater than the original sales price. The difference in the sale price and repurchase price is the cost of the use of the proceeds, or interest expense. Repurchase transactions are accounted for as financing arrangements rather than as sales of such securities, and the obligation to repurchase such securities is reflected as a liability in the Company’s consolidated balance sheets. The securities underlying the agreements remain under the Company’s control. Investment securities with a fair value of $187.4 million and $205.9 million were pledged as collateral for the securities sold under agreements to repurchase at December 31, 2015 and 2014 , respectively. As of December 31, 2015 and 2014 , the Bank had unused federal funds lines with correspondent banks of $565.0 million and $171.0 million , respectively.

Federal Home Loan Bank Borrowin

Federal Home Loan Bank Borrowings	12 Months Ended
	Dec. 31, 2015
FEDERAL HOME LOAN BANK BORROWINGS [Abstract]
Federal Home Loan Bank Advances, Disclosure [Text Block]	FEDERAL HOME LOAN BANK BORROWINGS The Bank is a member of the Federal Home Loan Bank (“FHLB”) of Boston. As a member of the FHLB of Boston, the Bank has access to short- and long-term borrowings. Borrowings from the FHLB are secured by the Bank’s stock investment in the FHLB and a blanket lien on “qualified collateral” defined principally as a percentage of the principal balance of certain types of mortgage loans. The stock investment cannot be used for additional borrowing collateral. The percentage of collateral valuation from the FHLB varies between 50% and 80% based on the underlying collateral. The Bank had loans pledged as collateral with a book value of $2.2 billion and $2.1 billion at December 31, 2015 and 2014 , respectively. The Bank had borrowings outstanding of $461.3 million and $370.2 million at December 31, 2015 and 2014 , respectively. Based on the collateral and the valuations applied, less the borrowings outstanding, the Bank had available credit with the FHLB of Boston of $1.2 billion at both December 31, 2015 and 2014 . A summary of borrowings from the FHLBs is as follows: December 31, 2015 Amount Weighted Average Rate (In thousands) Within 1 year $ 216,601 1.34 % Over 1 to 2 years 100,271 1.90 % Over 2 to 3 years 88,974 1.53 % Over 3 to 4 years 8,561 1.75 % Over 4 to 5 years 34,365 3.40 % Over 5 years 12,552 3.21 % Total $ 461,324 1.71 % As of December 31, 2015 , $11.0 million of the FHLB borrowings are callable by the FHLB prior to maturity. As of December 31, 2014 , $13.0 million of the FHLB borrowings are callable by the FHLB prior to maturity. FHLB Stock As a member of the FHLB, the Bank is required to own FHLB stock based on a percentage of outstanding advances in addition to a membership stock ownership requirement. Prior to the 2011 merger of the Banks, each of the Banks was a member of its local FHLB located in either Boston, Seattle, or San Francisco. At the time of the merger there were outstanding FHLB borrowings with both the FHLBs of San Francisco and Seattle. As of December 31, 2015 , only borrowings with the FHLB of San Francisco remain outstanding. The FHLB stock with San Francisco can be redeemed, subject to a waiting period, at par when the remaining advance matures. For the borrowings with the FHLB of Boston, the Bank is required to own FHLB stock of at least 3.0% to 4.5% of outstanding advances depending on the terms of the advance. In addition, the Bank is required to have a minimum Membership Stock Investment which is based on a percentage of certain assets as reported in the Bank’s FDIC Call Report. FHLB of Boston stock owned in excess of the minimum requirements can be redeemed at par upon request by a member. As of December 31, 2015 and 2014 , the Bank’s FHLB stock holdings totaled $35.2 million and $32.3 million , respectively, of which $34.2 million and $27.5 million , respectively was invested in the FHLB of Boston. The Bank’s investment in FHLB stock is recorded at cost and is redeemable at par. The remaining FHLB stock holdings are invested in the FHLB of San Francisco, of which two of the Company’s affiliate banks were members prior to their merger into the Bank in 2011.

Junior Subordinated Debentures

Junior Subordinated Debentures	12 Months Ended
	Dec. 31, 2015
JUNIOR SUBORDINATED DEBENTURES [Abstract]
Subordinated Borrowings Disclosure [Text Block]	JUNIOR SUBORDINATED DEBENTURES The schedule below presents the detail of the Company’s junior subordinated debentures: December 31, 2015 2014 (In thousands) Boston Private Capital Trust II junior subordinated debentures $ 103,093 $ 103,093 Boston Private Capital Trust I junior subordinated debentures 3,270 3,270 Total $ 106,363 $ 106,363 All of the Company’s junior subordinated debentures mature in more than five years. Boston Private Capital Trust II junior subordinated debentures In September 2005, the Company and Boston Private Capital Trust II, a Delaware statutory trust (“Trust II”) entered into a Purchase Agreement for the sale of $100 million of trust preferred securities issued by Trust II and guaranteed by the Company on a subordinated basis. Trust II’s preferred securities pay interest quarterly and had an annual distribution rate of 6.25% up to, but not including, December 30, 2010. Subsequently, Trust II’s preferred securities converted to a floating rate of a three-month LIBOR plus 1.68% ; provided, however, that the interest rate does not exceed the highest rate permitted by New York law, and may be modified by the U.S. law of general application . At December 31, 2015 , the interest rate for the Trust II’s preferred securities was 2.28% . The Company entered into an interest rate swap agreement beginning on December 30, 2010 to hedge the floating rate for a portion of this security. This interest rate swap matured on December 30, 2015, and the Company has not entered into a new swap agreement. See Part II. Item 8. “Financial Statements and Supplementary Data - Note 9: Derivatives and Hedging Activities” for additional details. Each of the Trust II preferred securities represents an undivided beneficial interest in the assets of Trust II. The Company owns all of Trust II’s common securities. Trust II’s only assets will be the junior subordinated debentures issued to it by the Company on substantially the same payment terms as Trust II’s preferred securities. The Company’s investment in Trust II was $3.1 million at both December 31, 2015 and 2014 . The junior subordinated debentures mature on December 30, 2035 and became redeemable after December 30, 2010 . The Company has the following covenants with regard to Trust II: • for so long as Trust II’s preferred securities remain outstanding, the Company shall maintain 100% ownership of the Trust II’s common securities; • the Company will use its commercially reasonable efforts to ensure Trust II remains a statutory trust, except in connection with a distribution of debt securities to the holders of the Trust II securities in liquidation of Trust II, the redemption of all Trust II’s securities or mergers, consolidations or incorporation, each as permitted by Trust II’s declaration of trust; • to continue to be classified as a grantor trust for U.S. federal income tax purposes; and • the Company will ensure each holder of Trust II’s preferred securities is treated as owning an undivided beneficial interest in the junior subordinated debentures. At December 31, 2015 and 2014 , the Company was in compliance with the above covenants. So long as the Company is not in default in the payment of interest on the junior subordinated debentures, the Company has the right under the indenture to defer payments of interest for up to 20 consecutive quarterly periods. The Company has no current intention to exercise its right to defer interest payments on the junior debentures issued to Trust II. If the Company defers interest payments, it would be subject to certain restrictions relating to the payment of dividends on or purchases of its capital stock and payments on its debt securities ranking equal with or junior to the junior subordinated debentures. Boston Private Capital Trust I junior subordinated debentures In 2004, the Company and Boston Private Capital Trust I, a Delaware statutory trust (“Trust I”), entered into a Purchase Agreement and an option, which was exercised in 2004, for the sale of a combined total of $105 million of convertible trust preferred securities to be issued by Trust I and guaranteed by the Company on a subordinated basis. The convertible trust preferred securities have a liquidation amount of $50.00 per security, pay interest quarterly and have a fixed distribution rate of 4.875% . The quarterly distributions are cumulative. The junior subordinated convertible debentures will mature on October 1, 2034 . From 2009 through 2013, the Company executed a series of repurchases totaling $105 million of Trust I’s convertible preferred securities, recognizing a combined pre-tax gain on repurchases of $26.5 million , including gains of $0.6 million in 2013. In 2014 and 2015, the Company repurchased no trust preferred securities, and therefore recognized no gain on repurchase. As of December 31, 2015 , there was an immaterial amount remaining outstanding of the Trust I convertible trust preferred securities. The Company’s investment in Trust I was $3.2 million at both December 31, 2015 and 2014 .

Noncontrolling Interests

Noncontrolling Interests	12 Months Ended
	Dec. 31, 2015
NONCONTROLLING INTERESTS [Abstract]
Noncontrolling Interest Disclosure [Text Block]	NONCONTROLLING INTERESTS At the Company, noncontrolling interests consist of equity owned by management of the Company’s respective majority-owned affiliates. Net income attributable to noncontrolling interests in the consolidated statements of operations represents the net income allocated to the noncontrolling interest owners of the affiliates. Net income allocated to the noncontrolling interest owners was $4.4 million , $4.8 million , and $3.9 million for the years ended December 31, 2015 , 2014 , and 2013 , respectively. On the consolidated balance sheets, noncontrolling interests are included as the sum of the capital and undistributed profits allocated to the noncontrolling interest owners. Typically, this balance is included in a company’s permanent shareholders’ equity in the consolidated balance sheets. When the noncontrolling interest owners’ rights include certain redemption features, as described in ASC 480, Distinguishing Liabilities from Equity , such redeemable noncontrolling interests are classified as mezzanine equity and are not included in permanent shareholders’ equity. Due to the redemption features of the noncontrolling interests discussed in this footnote, the Company had redeemable noncontrolling interests held in mezzanine equity in the accompanying consolidated balance sheets of $18.1 million and $20.9 million at December 31, 2015 and 2014 , respectively. The aggregate amount of such redeemable noncontrolling equity interests are recorded at the estimated maximum redemption values, as discussed below. In addition, as discussed below, the Company had $3.4 million and $0.4 million in noncontrolling interests included in permanent shareholders’ equity at December 31, 2015 and 2014 , respectively. Each non-wholly owned affiliate operating agreement provides the Company and/or the noncontrolling interests with contingent call or put redemption features used for the orderly transfer of noncontrolling equity interests between the affiliate noncontrolling interest owners and the Company at either a contractually predetermined fair value, multiple of EBITDA, or fair value. The Company may liquidate these noncontrolling interests in cash, shares of the Company’s common stock, or other forms of consideration dependent on the operating agreement. Generally, these put and call redemption features refer to shareholder rights of both the Company and the noncontrolling interest owners of the Company’s majority-owned affiliate companies. The affiliate company noncontrolling interests generally take the form of limited liability companies (LLC) units, profits interests, or common stock (collectively, the “noncontrolling equity interests”). In most circumstances, the put and call redemption features generally relate to the Company’s right and, in some cases, obligation to purchase and the noncontrolling equity interests’ right to sell their equity interests. There are various events that could cause the puts or calls to be exercised, such as a change in control, death, disability, retirement, resignation or termination. The puts and calls are generally to be exercised at the then fair value or a contractually agreed upon approximation thereof. The terms of these rights vary and are governed by the respective individual operating and legal documents. The following table presents, by affiliate, the noncontrolling interests included as redeemable noncontrolling interests and noncontrolling interests in mezzanine and permanent equity, respectively, at the periods indicated: December 31, 2015 December 31, 2014 (In thousands) Anchor $ 11,907 $ 11,929 BOS 6,744 6,069 DGHM (1) 2,830 3,293 Total $ 21,481 $ 21,291 Redeemable noncontrolling interests $ 18,088 $ 20,905 Noncontrolling interests $ 3,393 $ 386 _____________ (1) Only includes redeemable noncontrolling interests. The following is a summary, by individual affiliate, of the terms of the put and call options: Anchor The Company, through its acquisition of Anchor, acquired approximately an 80% interest in each of Anchor and Anchor Russell on June 1, 2006. Effective January 1, 2013, Anchor Russell merged into Anchor, with Anchor as the surviving entity. Anchor management, employees, and certain retired employees own the remaining noncontrolling equity interests of the firm, approximately 20%. The Anchor operating agreement describes a process for the orderly transfer of noncontrolling equity interests between the Company and the Anchor noncontrolling interest owners at a contractually agreed upon value, with appraisal rights for all parties. Certain events, such as death, disability, retirement, resignation, or termination, may result in repurchase of the noncontrolling equity interests by the Company at the then contractually agreed upon value. The Anchor agreement provides a formulaic mechanism to determine the then value of the noncontrolling equity interests. These noncontrolling equity interests have a five-year vesting period. Beginning six months after vesting, a holder of noncontrolling equity interests may put up to 10% of his or her outstanding equity interests annually to the Company. The six-month holding period ensures the risks and rewards of ownership are transferred to the holder of the noncontrolling equity interests. Holders of noncontrolling equity interests must retain 50% of their total outstanding units until such time as they leave the firm. In 2013, the Company sold certain repurchased noncontrolling interests to employees at Anchor with modified contingent call and put redemption features. These modified noncontrolling interests have the same terms and conditions as the previously issued noncontrolling interests with the exception that they require the approval of the Company’s CEO in order to be exercised. Therefore, these modified noncontrolling interests are not considered to be mandatorily redeemable and are not included in the redeemable noncontrolling interests within mezzanine equity, but rather within permanent equity. The maximum redemption value, based on the contractually determined maximum redemption value formula, to repurchase the remaining approximately 20% of Anchor’s noncontrolling equity interests is approximately $11.9 million as of both December 31, 2015 and 2014 . Of the $11.9 million of noncontrolling equity interests at December 31, 2015 , $1.3 million is included in permanent equity and the remainder is included in mezzanine equity. Of the $11.9 million of noncontrolling equity interests at December 31, 2014 , $0.4 million is included in permanent equity and the remainder is included in mezzanine equity. BOS The Company acquired approximately a 70% interest in BOS through a series of purchases dating back to February 5, 2004. The remaining approximate 30% is owned by BOS principals and certain retired principals. The BOS operating agreement describes a procedure for the orderly transfer of noncontrolling equity interests between the BOS noncontrolling interest owners and the Company at the then fair value, with appraisal rights for all parties. Certain events, such as death, disability, retirement, resignation, or voluntary termination, subject to the vesting period, will result in repurchase of the noncontrolling equity interests by the Company at the then fair value, unless another noncontrolling interest owner opts to purchase the noncontrolling equity interests in question. These noncontrolling equity interests have vesting periods of up to seven years. Immediately after vesting, a holder of noncontrolling equity interests may put up to the greater of 10% of his or her outstanding equity interests or 1% of total outstanding equity interests in BOS annually to the Company. Any unexercised portion of the annual put option can be carried forward to future years, provided that noncontrolling interest owners retain approximately 50% of their total outstanding units until such time as they leave the firm. In 2015, the Company entered into an updated operating agreement with BOS which provides for a certain portion of the BOS noncontrolling interest owners’ to include modified contingent call and put redemption features. These modified noncontrolling interests have the same terms and conditions as the previously issued noncontrolling interests with the exception that they require the approval of the Company’s CEO in order to be exercised. Therefore, these modified noncontrolling interests are not considered to be mandatorily redeemable and are not included in the redeemable noncontrolling interests within mezzanine equity, but rather within permanent equity. The maximum redemption value, based on fair value, to repurchase the remaining approximately 30% of BOS’ noncontrolling equity interests is approximately $6.7 million and $6.1 million as of December 31, 2015 and 2014 , respectively. Of the $6.7 million of noncontrolling equity interests at December 31, 2015 , $2.1 million is included in permanent equity and the remainder is included in mezzanine equity. All of the $6.1 million of noncontrolling equity interests at December 31, 2014 is included in mezzanine equity. DGHM The Company, through its acquisition of DGHM, acquired an 80% interest in DGHM on February 6, 2004. DGHM management and employees own the remaining 20% interest in DGHM. The DGHM operating agreement describes a process for the orderly transfer of noncontrolling equity interests between the Company and the DGHM noncontrolling interest owners at a contractually agreed upon value, with appraisal rights for all parties. Certain events, such as a change in control, death, disability, retirement, resignation or termination, may result in repurchase of the noncontrolling equity interests by the Company at the then contractually agreed upon value. The DGHM operating agreement provides a formulaic mechanism to determine the then value of the noncontrolling equity interests. These noncontrolling equity interests have a five-year vesting period. Beginning six months after vesting, a holder of noncontrolling equity interests may put up to 10%-20% of his or her outstanding units annually to the Company. The six-month holding period ensures the risks and rewards of ownership are transferred to the holder of the noncontrolling equity interests. Beginning in December 2009, the Company has an annual call right under which it may elect to repurchase 10-20% of the non-management and management members’ vested units. No more than 40% of the outstanding noncontrolling equity interests’ units can be put in any one year. Certain key members of DGHM management are contractually obligated to retain 50% of their noncontrolling equity interests until such time as they leave the firm. The maximum redemption value, based on the contractually determined maximum redemption value formula, to repurchase the remaining 20% of DGHM’s noncontrolling equity interests is approximately $2.8 million and $3.3 million as of December 31, 2015 and 2014 , respectively. The following tables present an analysis of the Company’s redeemable noncontrolling interests for the periods indicated: Year ended Year ended December 31, 2015 December 31, 2014 Redeemable noncontrolling interests Noncontrolling interests Redeemable noncontrolling interests Noncontrolling interests (In thousands) Noncontrolling interests at beginning of period $ 20,905 $ 386 $ 19,468 $ 171 Net income attributable to noncontrolling interests 3,575 832 4,564 186 Distributions (4,189 ) (422 ) (4,426 ) (177 ) Purchases/ (sales) of ownership interests (1,666 ) 419 (1,879 ) 74 Transfers of ownership interests from mezzanine to permanent equity (1,652 ) 1,652 — — Amortization of equity compensation — 472 — 96 Adjustments to fair value 1,115 54 3,178 36 Noncontrolling interests at end of period $ 18,088 $ 3,393 $ 20,905 $ 386 Year ended December 31, 2013 Redeemable noncontrolling interests Noncontrolling interests (In thousands) Noncontrolling interests at beginning of period $ 19,287 $ — Net income attributable to noncontrolling interests 3,849 99 Distributions (3,363 ) (53 ) Purchases/ (sales) of ownership interests — 125 Adjustments to fair value (305 ) — Noncontrolling interests at end of period $ 19,468 $ 171 Impact on EPS from Certain Changes in Redemption Value To the extent that the increase in the estimated maximum redemption amounts exceeds the net income attributable to the noncontrolling interests, such excess may reduce net income attributable to the Company’s common shareholders for purposes of the Company’s EPS computations depending upon how the maximum redemption value is calculated. In cases where the maximum redemption value is calculated using a contractually determined value or predefined formula, such as a multiple of EBITDA, there may be a reduction to the net income attributable to the Company’s common shareholders for purposes of the Company’s EPS computations. However, in cases where maximum redemption value is calculated using the then fair value, there is no effect on EPS. Fair value can be derived through an enterprise value using market observations of comparable firms, a discounted cash flow analysis, or a combination of the two, among other things, rather than a contractually predefined formula or multiple of EBITDA.

Equity

Equity	12 Months Ended
	Dec. 31, 2015
Equity [Abstract]
Stockholders' Equity Note Disclosure [Text Block]	EQUITY Preferred Stock The Company has 2,000,000 depositary shares outstanding at both December 31, 2015 and December 31, 2014 (the “Depositary Shares”). Each Depositary Share represents a 1/40th interest in a share of the Company’s 6.95% Non-Cumulative Perpetual Preferred Stock, Series D, par value $1.00 per share and liquidation preference of $1,000 per share (the “Series D preferred stock”). This represents the entire $47.8 million balance of preferred stock on the Company’s balance sheet at both December 31, 2015 and December 31, 2014 . The ability of the Company to declare and pay dividends on, or purchase, redeem or otherwise acquire, shares of its preferred stock or any securities of the Company that rank junior to the Series D preferred stock is subject to certain restrictions in the event that the Company does not declare and pay (or set aside) dividends on the Series D preferred stock for the last preceding quarterly dividend period. Common Stock The Company has 170 million shares of common stock authorized for issuance. At December 31, 2015 , it had 83,410,961 shares outstanding and 86,589,039 shares available for future issuance, including shares reserved for future issuance pursuant to the Company’s stock-based compensation plans, as discussed in Part II. Item 8. “Financial Statements and Supplementary Data - Note 18: Employee Benefits.” At December 31, 2014 , it had 82,961,855 shares outstanding and 87,038,145 shares available for future issuance, Warrants to purchase common stock The Company currently has one class of warrants to purchase common stock outstanding. These warrants were initially issued to the U.S. Department of the Treasury (the “Treasury”) (the “TARP warrants”). The following table summarizes the terms of the TARP warrant agreements outstanding at December 31, 2015 : Name of warrants Number of warrants Original warrant share number Current warrant share number (2) Original exercise price of warrants Current exercise price of warrants (2) Date issued Expiration date TARP Warrants (1) 2,887,500 1.00 1.08 $8.000 $7.411 11/21/2008 11/21/2018 ___________________ (1) The TARP warrants, while initially issued to the Treasury, were purchased from the Treasury by unrelated third parties at a market rate. (2) Per the terms of the TARP warrants agreement, the exercise price and number of shares issuable upon exercise may be adjusted ratably for dividends paid on the Company’s common stock that exceed the dividend rate at the time the warrants were issued, at which time the Company paid quarterly dividends of $0.01 per share. The current warrant share number and current exercise price of the warrant reflect the warrant as adjusted for common stock dividends through February 10, 2016, the latest dividend record date prior to the filing of this Annual Report. Accumulated Other Comprehensive Income Other comprehensive income/ (loss) represents the change in equity of the Company during a year from transactions and other events and circumstances from non-shareholder sources. It includes all changes in equity during a year except those resulting from investments by shareholders and distributions to shareholders. The following table presents the Company’s comprehensive income/ (loss) and related tax effect for the years ended December 31, 2015 , 2014 , and 2013 : Other comprehensive income/(loss): Pre-tax Tax expense/ (benefit) Net (In thousands) 2015 Unrealized gain/ (loss) on securities available-for-sale $ (2,494 ) $ (1,145 ) $ (1,349 ) Less: Adjustment for realized gains/ (losses), net 236 97 139 Net unrealized gain/ (loss) on securities available-for-sale (2,730 ) (1,242 ) (1,488 ) Unrealized gain/ (loss) on cash flow hedge (2,642 ) (1,088 ) (1,554 ) Add: scheduled reclass and other 4,052 1,698 2,354 Net unrealized gain/ (loss) on cash flow hedge 1,410 610 800 Net unrealized gain/ (loss) on other (193 ) (78 ) (115 ) Other comprehensive gain/ (loss) (1,513 ) (710 ) (803 ) Net income attributable to the Company (1) 95,317 30,392 64,925 Total comprehensive income $ 93,804 $ 29,682 $ 64,122 2014 Unrealized gain/ (loss) on securities available-for-sale $ 6,231 $ 2,495 $ 3,736 Less: Adjustment for realized gains/ (losses), net (7 ) (3 ) (4 ) Net unrealized gain/ (loss) on securities available-for-sale 6,238 2,498 3,740 Unrealized gain/ (loss) on cash flow hedges (3,425 ) (1,416 ) (2,009 ) Add: scheduled reclass and other 3,198 1,349 1,849 Net unrealized gain/ (loss) on cash flow hedges (227 ) (67 ) (160 ) Net unrealized gain/ (loss) on other (135 ) (55 ) (80 ) Other comprehensive gain/ (loss) 5,876 2,376 3,500 Net income attributable to the Company (1) 101,180 32,365 68,815 Total comprehensive income $ 107,056 $ 34,741 $ 72,315 2013 Unrealized gain/ (loss) on securities available-for-sale $ (11,797 ) $ (4,656 ) $ (7,141 ) Less: Adjustment for realized gains/ (losses), net 49 21 28 Net unrealized gain/ (loss) on securities available-for-sale (11,846 ) (4,677 ) (7,169 ) Unrealized gain/ (loss) on cash flow hedges 15 13 2 Add: scheduled reclass and other 2,083 879 1,204 Net unrealized gain/ (loss) on cash flow hedges 2,098 892 1,206 Net unrealized gain/ (loss) on other (652 ) (294 ) (358 ) Other comprehensive gain/ (loss) (10,400 ) (4,079 ) (6,321 ) Net income attributable to the Company (1) 103,498 32,963 70,535 Total comprehensive income $ 93,098 $ 28,884 $ 64,214 ___________________ (1) Pre-tax net income attributable to the Company is calculated as income before income taxes, plus net income from discontinued operations, less net income attributable to noncontrolling interests. The following table presents a summary of the amounts reclassified from accumulated other comprehensive income/ (loss) for the years ended December 31, 2015 , 2014 , and 2013 : Description of component of accumulated other comprehensive income/ (loss) Year ended December 31, Affected line item in Statement of Operations 2015 2014 2013 (In thousands) Adjustment for realized gains/(losses) on securities available for sale, net: Pre-tax $ 236 $ (7 ) $ 49 Gain/ (loss) on sale of investments, net Tax expense/ (benefit) 97 (3 ) 21 Income tax expense Net $ 139 $ (4 ) $ 28 Net income attributable to the Company Net realized gain/ (loss) on cash flow hedges: Hedge related to junior subordinated debentures: Pre-tax $ 1,879 $ 1,926 $ 1,894 Interest expense on junior subordinated debentures Tax expense/ (benefit) 804 824 799 Income tax expense Net $ (1,075 ) $ (1,102 ) $ (1,095 ) Net income attributable to the Company Hedge related to deposits Pre-tax $ 2,173 $ 1,272 $ 189 Interest expense on deposits Tax expense/ (benefit) 894 525 80 Income tax expense Net $ (1,279 ) $ (747 ) $ (109 ) Net income attributable to the Company Total reclassifications for the period, net of tax $ (2,354 ) $ (1,849 ) $ (1,204 ) The following table presents the components of the Company’s accumulated other comprehensive income/ (loss) as of December 31: 2015 2014 2013 (In thousands) Unrealized gain/ (loss) on securities available for sale, net of tax $ 495 $ 1,983 $ (1,757 ) Unrealized gain/ (loss) on cash flow hedges, net of tax (1,123 ) (1,923 ) (1,763 ) Unrealized gain/ (loss) on other, net of tax (872 ) (757 ) (677 ) Accumulated other comprehensive income/ (loss) $ (1,500 ) $ (697 ) $ (4,197 )

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2015
Earnings Per Share [Abstract]
Earnings Per Share [Text Block]	EARNINGS PER SHARE Earnings Per Share (“EPS”) Basic EPS is computed by dividing net income attributable to common shareholders by the weighted average number of common shares outstanding during the year. Diluted EPS is determined in the same manner as basic EPS except that the number of shares is increased assuming exercise or contingent issuance of the options, warrants or other dilutive securities; and conversion of the convertible trust preferred securities and Series B Preferred. Additionally, when dilutive, interest expense (net of tax) related to the convertible trust preferred securities, and dividends related to the preferred stock are added back to net income attributable to common shareholders. The calculation of diluted EPS excludes the potential dilution of common shares and the inclusion of any related expenses if the effect is antidilutive. On April, 24 2013, the Company repurchased all of its Series B Preferred stock. The effects of the Series B Preferred for the year ended December 31, 2013 are on a weighted average basis for purposes of calculating EPS. The following table is a reconciliation of the components of basic and diluted EPS computations for the three years ended December 31: For the year ended December 31, 2015 2014 2013 (In thousands, except share and per share data) Basic earnings per share - Numerator: Net income from continuing operations $ 62,921 $ 67,405 $ 66,691 Less: Net income attributable to noncontrolling interests 4,407 4,750 3,948 Net income from continuing operations attributable to the Company 58,514 62,655 62,743 Decrease/ (increase) in noncontrolling interests’ redemption values (1) 464 (525 ) (368 ) Dividends on preferred and participating securities (2) (3,566 ) (3,703 ) (14,689 ) Total adjustments to income attributable to common shareholders (3,102 ) (4,228 ) (15,057 ) Net income from continuing operations attributable to common shareholders, before allocation to participating securities 55,412 58,427 47,686 Less: Amount allocated to participating securities (74 ) (282 ) (1,243 ) Net income from continuing operations attributable to common shareholders, after allocation to participating securities $ 55,338 $ 58,145 $ 46,443 Net income from discontinued operations, before allocation to participating securities $ 6,411 $ 6,160 $ 7,792 Less: Amount allocated to participating securities (18 ) (53 ) (336 ) Net income from discontinued operations, after allocation to participating securities $ 6,393 $ 6,107 $ 7,456 Net income attributable to common shareholders, before allocation to participating securities $ 61,823 $ 64,587 $ 55,478 Less: Amount allocated to participating securities (92 ) (335 ) (1,579 ) Net income attributable to common shareholders, after allocation to participating securities $ 61,731 $ 64,252 $ 53,899 Basic earnings per share - Denominator: Weighted average basic common shares outstanding 80,885,253 78,921,480 77,373,817 Per share data - Basic earnings per share from: Continuing operations $ 0.68 $ 0.73 $ 0.60 Discontinued operations $ 0.08 $ 0.08 $ 0.10 Total attributable to common shareholders $ 0.76 $ 0.81 $ 0.70 For the year ended December 31, 2015 2014 2013 (In thousands, except share and per share data) Diluted earnings per share - Numerator: Net income from continuing operations attributable to common shareholders, after allocation to participating securities $ 55,338 $ 58,145 $ 46,443 Add back: income allocated to dilutive securities — — — Net income from continuing operations attributable to common shareholders, after allocation to participating securities, after assumed dilution 55,338 58,145 46,443 Net income from discontinued operations, after allocation to participating securities 6,393 6,107 7,456 Net income attributable to common shareholders, after allocation to participating securities, after assumed dilution $ 61,731 $ 64,252 $ 53,899 Diluted earnings per share - Denominator: Weighted average basic common shares outstanding 80,885,253 78,921,480 77,373,817 Dilutive effect of: Stock options and non-participating performance-based and certain time-based restricted stock (3) 1,133,511 759,138 656,066 Warrants to purchase common stock (3) 1,206,389 1,198,613 723,641 Dilutive common shares 2,339,900 1,957,751 1,379,707 Weighted average diluted common shares outstanding (3) 83,225,153 80,879,231 78,753,524 Per share data - Diluted earnings per share from: Continuing operations $ 0.66 $ 0.72 $ 0.59 Discontinued operations $ 0.08 $ 0.07 $ 0.09 Total attributable to common shareholders $ 0.74 $ 0.79 $ 0.68 Dividends per share declared and paid on common stock $ 0.36 $ 0.32 $ 0.24 _____________________ (1) See Part II. Item 8. “Financial Statements and Supplementary Data - Note 14: Noncontrolling Interests” for a description of the redemption values related to the redeemable noncontrolling interests. In accordance with ASC 480, Distinguishing Liabilities from Equity (“ASC 480”), an increase in redemption values from period to period reduces income attributable to common shareholders. Decreases in redemption value from period to period increase income attributable to common shareholders, but only to the extent that the cumulative change in redemption value remains a cumulative increase since adoption of this standard in the first quarter of 2009. (2) Consideration paid in excess of carrying value for the repurchase of the Series B preferred stock of $11.7 million is considered a deemed dividend and, for purposes of calculating EPS, reduces net income attributable to common shareholders for the year ended December 31, 2013 . (3) The diluted EPS computations for the years ended December 31, 2015 , 2014 , and 2013 do not assume the conversion, exercise or contingent issuance of the following shares for the following periods because the result would have been antidilutive for the periods indicated. As a result of the anti-dilution, the potential common shares excluded from the diluted EPS computation are as follows: For the year ended December 31, 2015 2014 2013 Shares excluded due to anti-dilution (treasury method): (In thousands) Potential common shares from: Convertible trust preferred securities (a) 1 1 1 Total shares excluded due to anti-dilution 1 1 1 For the year ended December 31, 2015 2014 2013 Shares excluded due to exercise price exceeding the average market price of common shares during the period (total outstanding): (In thousands) Potential common shares from: Options, restricted stock, or other dilutive securities (b) 548 829 1,399 Total shares excluded due to exercise price exceeding the average market price of common shares during the period 548 829 1,399 (a) If the effect of the conversion of the trust preferred securities would have been dilutive, an immaterial amount of interest expense, net of tax, related to the convertible trust preferred securities would have been added back to net income attributable to common shareholders for the diluted EPS computation for the years presented. (b) Options to purchase shares of common stock, non-participating performance- and certain time-based restricted stock, and other dilutive securities that were outstanding at period ends were not included in the computation of diluted EPS or in the above anti-dilution table because their exercise or conversion prices were greater than the average market price of the common shares during the respective periods.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2015
Income Taxes [Abstract]
Income Tax Disclosure [Text Block]	INCOME TAXES The components of income tax expense for continuing operations for the years ended December 31, 2015 , 2014 , and 2013 are as follows: Year Ended December 31, 2015 2014 2013 (In thousands) Current expense: Federal $ 25,631 $ 20,557 $ 17,758 State 9,183 7,254 6,622 Total current expense 34,814 27,811 24,380 Deferred expense/(benefit): Federal (3,185 ) 3,895 6,153 State (1,237 ) 659 2,430 Total deferred expense/(benefit) (4,422 ) 4,554 8,583 Income tax expense $ 30,392 $ 32,365 $ 32,963 Income tax expense attributable to income from continuing operations differs from the amounts computed by applying the Federal statutory rate to pre-tax income from continuing operations. Reconciliations between the Federal statutory income tax rate of 35% to the effective income tax rate for the years ended December 31, 2015 , 2014 , and 2013 are as follows: Year Ended December 31, 2015 2014 2013 Statutory Federal income tax rate 35.0 % 35.0 % 35.0 % Increase/ (decrease) resulting from: Tax exempt interest, net (7.1 )% (5.6 )% (5.0 )% State and local income tax, net of Federal tax benefit 5.5 % 5.2 % 5.9 % Tax credits (1.9 )% (1.7 )% (1.3 )% Noncontrolling interests (1.6 )% (1.7 )% (1.4 )% Out-of-period adjustment 1.3 % — % — % Other, net 1.4 % 1.2 % (0.1 )% Effective income tax rate 32.6 % 32.4 % 33.1 % During the third quarter of 2015, the Company reevaluated its executive compensation plans and identified certain executive compensation that was previously treated as fully deductible was non-deductible. The correction resulted in $1.2 million of additional federal tax expense and $0.2 million of additional state tax, net of federal tax benefit, that was related to prior years. After evaluating the quantitative and qualitative aspects of the correction, the Company determined that previously issued consolidated financial statements were not materially misstated and, as a result, recorded the correction in 2015. On April 13, 2015, New York City enacted legislation that requires corporations that are engaged in unitary business operations to file combined returns with their affiliates for tax years beginning on or after January 1, 2015. Starting in 2015, all of the Company’s affiliates will be included in the Company’s New York City tax return instead of just those affiliates with nexus to New York City. The Company incorporated the impact of these New York City law changes in 2015 due to the law being enacted in 2015. The Company adjusted the New York City apportionment percentages for purposes of measuring deferred tax assets and liabilities that will reverse after the effective date. As a result of these changes, the Company recorded a state tax benefit of $0.5 million , net of federal tax, in 2015. On March 31, 2014, New York enacted legislation that requires corporations that are engaged in unitary business operations to file combined returns with their affiliates for tax years beginning on or after January 1, 2015. Starting in 2015, all of the Company’s affiliates will be included in the Company’s New York tax return instead of just those affiliates with nexus to New York. In addition, the New York tax rate will be reduced from 7.1% to 6.5% for tax years beginning on or after January 1, 2016. The Company incorporated the impact of these New York law changes in 2014 due to the law being enacted in 2014. The Company adjusted the New York state applicable tax rate and apportionment percentages for purposes of measuring deferred tax assets and liabilities that will reverse after the effective date. As a result of these changes, the Company recorded a state tax benefit of $0.5 million , net of federal tax, in 2014. The components of gross deferred tax assets and gross deferred tax liabilities at December 31, 2015 and 2014 are as follows: December 31, 2015 2014 (In thousands) Gross deferred tax assets: Allowance for loan losses $ 37,401 $ 32,024 Allowance for losses on OREO 912 875 Stock compensation 7,391 7,709 Deferred and accrued compensation 19,370 17,438 State loss carryforward, net of federal 60 103 Capital loss carryforward 458 469 Mark to market on securities available for sale 274 414 Contingent payments 1,978 1,765 Unrealized loss on investments 748 165 Fixed assets — 688 Other 1,589 1,149 Gross deferred tax assets 70,181 62,799 Less: valuation allowance 458 298 Total deferred tax assets 69,723 62,501 Gross deferred tax liabilities: Cancellation of debt income deferral 4,035 5,572 Goodwill and acquired intangible assets 11,894 7,989 Fixed assets 62 — Other 2,033 1,364 Total gross deferred tax liabilities 18,024 14,925 Net deferred tax asset $ 51,699 $ 47,576 Of the $4.1 million net increase in the Company’s net deferred tax asset during 2015, $4.4 million was recognized as deferred income tax benefit for continuing operations, $0.1 million was recognized as deferred income tax benefit for discontinued operations and $0.4 million was recognized as a decrease to shareholders’ equity. In accordance with ASC 740, deferred tax assets are to be reduced by a valuation allowance if, based on the weight of available evidence, it is more likely than not that some portion or all of the deferred tax assets will not be realized. The realization of the tax benefit depends upon the existence of sufficient taxable income within the carry-back and future periods. The Company believes that it is more likely than not that the net deferred tax asset as of December 31, 2015, excluding the net deferred tax asset on capital losses, will be realized, based upon the ability to generate future taxable income as well as the availability of current and historical taxable income. The Company believes the existing net deductible temporary differences that give rise to the net deferred tax asset, excluding the capital losses, will reverse in future periods when the Company expects to generate taxable income. Other positive evidence to support the realization of the Company’s net deferred tax asset includes: • The Company had cumulative pre-tax income, as adjusted for permanent book-to-tax differences, in the period 2013 through 2015. • Certain tax planning strategies are available to the Company, such as reducing investments in tax-exempt securities. • The Company has not had any operating loss or tax credit carryovers expiring unused in recent years. At December 31, 2015, the Company had a $0.5 million deferred tax asset for $1.2 million of capital loss carryovers that are scheduled to expire in 2016. The Company believes it is more likely than not that the net deferred tax asset related to capital losses will not be realized and has recorded a valuation allowance of $0.5 million and $0.3 million at December 31, 2015 and 2014, respectively, attributable to this net deferred tax asset. The net change in the valuation allowance during the year ending December 31, 2015 of $0.2 million is primarily attributable to prior year provision to return differences. At December 31, 2015, the Company had a $0.1 million deferred tax asset for state net operating loss carryovers totaling $1.5 million that are scheduled to expire in various tax years: $0.1 million in 2030; $0.1 million in 2031; and $1.3 million in 2032. The Company believes that it is more likely than not that the full amount of these state net operating loss carryovers will be utilized before they expire. A reconciliation of the beginning and ending gross amount of unrecognized tax benefits under the provisions of ASC 740-10 is as follows: 2015 2014 2013 (In thousands) Balance at January 1 $ 1,067 $ 549 $ 4,802 Additions based on tax positions related to the current year 163 245 143 Additions based on tax positions taken in prior years — 366 1,493 Decreases based on tax positions taken in prior years — — (4,332 ) Decreases based on settlements with taxing authorities — — (1,493 ) Decreases based on the expiration of statute of limitations (208 ) (93 ) (64 ) Balance at December 31 $ 1,022 $ 1,067 $ 549 Excluded from the gross amount of unrecognized tax benefits for the years ended December 31, 2015, 2014, and 2013 are the federal tax benefits associated with the gross amount of state unrecognized tax benefits which, if recognized, would affect the effective tax rate. The net amount of unrecognized tax benefit which, if recognized, would affect the effective tax rate is $0.8 million at December 31, 2015 and December 31, 2014, and $0.4 million at December 31, 2013. The Company classifies interest and penalties, if applicable, related to unrecognized tax benefits as a component of income tax expense in the consolidated statements of operations. Interest and penalties recognized as part of the Company’s income tax expense was immaterial for the years ending December 31, 2015 and December 31, 2014 and a benefit of $0.4 million for the year ended December 31, 2013. The accrued amounts for interest and penalties were immaterial as of December 31, 2015, 2014, and 2013. Federal income tax returns are either under examination or remain subject to examination by the Internal Revenue Service for all tax years subsequent to 2011. The examination by the Internal Revenue Service for the tax year ended December 31, 2009 was settled in August, 2015. The resolution of this examination did not have a significant impact on the effective tax rate. State income tax returns for the Company’s major tax jurisdictions of California, Massachusetts, and New York have either been examined or remain subject to examination for all the tax years subsequent to 2011. The examination by the State of New York for the tax years ended December 31, 2008 through 2011 was settled in November 2013. The resolution of this examination resulted in a release of gross state unrecognized tax benefits of $1.5 million , of which $0.6 million , including the federal tax benefits associated with the gross amount of these benefits, affected the effective tax rate. The examination by the State of New York for the tax year ended December 31, 2012 was settled in February, 2015. The resolution of this examination did not have a significant impact on the effective tax rate.

Employee Benefits Employee Bene

Employee Benefits Employee Benefits (Notes)	12 Months Ended
	Dec. 31, 2015
EMPLOYEE BENEFITS [Abstract]
Compensation and Employee Benefit Plans [Text Block]	EMPLOYEE BENEFITS Employee 401(k) Profit Sharing Plan The Company established a corporate-wide 401(k) Profit Sharing Plan (the “401(k) Plan”) for the benefit of the employees of the Company and its affiliates, which became effective on July 1, 2002. The 401(k) Plan is a 401(k) savings and retirement plan that is designed to qualify as an ERISA section 404(c) plan. Generally, employees who are at least twenty-one (21) years of age are eligible to participate in the plan on their date of hire. Employee contributions may be matched based on a predetermined formula and additional discretionary contributions may be made. 401(k) expense was $2.8 million , $2.4 million , and $2.4 million , in the years ended December 31, 2015 , 2014 , and 2013 , respectively. Salary Continuation Plans The Bank maintains a salary continuation plan for certain officers in the Bank’s San Francisco Bay market, including current or former officers of the Bank. The officers become eligible for benefits under the salary continuation plan if they reach a defined retirement age while working for the Bank. The Bank also has a deferred compensation plan for certain former directors of Borel. The compensation expense relating to each contract is accounted for individually. The expense relating to these plans was $0.1 million for each of the years ended December 31, 2015 , 2014 , and 2013 . The amount recognized in other liabilities in the consolidated balance sheets was $1.3 million and $1.6 million at December 31, 2015 and 2014 , respectively. The Bank has purchased life insurance contracts to help fund these plans. The Bank has single premium life insurance policies with cash surrender values totaling $6.2 million and $6.0 million , which are included in other assets in the consolidated balance sheets, as of December 31, 2015 and 2014 , respectively. The Bank also maintains a salary continuation plan for certain officers of the Bank’s Southern California market, including current or former officers of the Bank. The plan provides for payments to the participants at the age of retirement. The expense relating to these plans was $0.1 million , $0.2 million , and $0.2 million for the years ended December 31, 2015 , 2014 , and 2013 , respectively. The net amount recognized in other liabilities in the consolidated balance sheets was $2.0 million and $2.1 million at December 31, 2015 and 2014 , respectively. The Bank has purchased life insurance contracts to help fund these plans. These life insurance policies have cash surrender values totaling $4.7 million and $4.6 million at December 31, 2015 and 2014 , respectively, which are included in other assets in the consolidated balance sheets. Deferred Compensation Plan The Company offers a deferred compensation plan (the “Deferred Compensation Plan”) that enables certain executives to elect to defer a portion of their compensation. The amounts deferred are excluded from the employee’s taxable income and are not deductible for income tax purposes by the Company until paid. The net deferred amount related to the Deferred Compensation Plan in other liabilities in the consolidated balance sheets was $5.6 million and $6.3 million at December 31, 2015 and 2014 , respectively. Increases and decreases in the value of the Deferred Compensation Plan are recognized as compensation expense in the consolidated statements of operations. The expense relating to the Deferred Compensation Plan was a loss of $0.1 million , a gain of $0.6 million , and a gain of $0.9 million for the years ended December 31, 2015 , 2014 , and 2013 , respectively. The Company has adopted a special trust for the Deferred Compensation Plan called a Rabbi Trust. A Rabbi Trust is an arrangement that is used to accumulate assets that may be used to “fund” the Company’s obligation to pay benefits under the Deferred Compensation Plan. However, to prevent immediate taxation to the executives who participate in the Deferred Compensation Plan, the amounts placed in the Rabbi Trust must remain subject to the claims of the Company’s creditors. The investments chosen by the participants in the Deferred Compensation Plan are mirrored by the Rabbi Trust as a way to minimize the earnings volatility of the Deferred Compensation Plan. The net amount recognized in other assets in the consolidated balance sheets was $5.6 million and $5.4 million at December 31, 2015 and 2014 , respectively. Increases and decreases in the value of the Rabbi Trust are recognized in other income in the consolidated statement of operations. The income relating to this plan was a loss of $0.1 million , a gain of $0.6 million , and a gain of $1.0 million for the years ended December 31, 2015 , 2014 , and 2013 , respectively. Stock-Based Incentive Plans At December 31, 2015 , the Company has three stock-based compensation plans. These plans encourage and enable the officers, employees, and non-employee directors of the Company to acquire a proprietary interest in the Company. The 2009 Stock Option and Incentive Plan (the “2009 Plan”), replaced the Company’s 2004 Stock Option and Incentive Plan. Under the 2009 Plan, the Company may grant options, stock appreciation rights, restricted stock, restricted stock units, unrestricted stock awards, performance share awards and dividend equivalent rights to its officers, employees, and non-employee directors of the Company for an amount not to exceed 2% of the total shares of common stock outstanding as of the last business day of the preceding fiscal year. The 2009 Plan provides for the authorization and issuance of 4,000,000 shares , along with any residual shares from previous plans. Under the 2009 Plan, the exercise price of each option shall not be less than 100% of the fair market value of the stock on the date the options are granted. Generally, options expire ten years from the date granted and vest over a three-year graded vesting period for officers and employees and a one-year or less period for non-employee directors. Stock grants generally vest over a three-year cliff vesting period . As of December 31, 2015 the maximum number of shares of stock reserved and available for issuance under the Plan was 2,674,252 shares . Under the Boston Private Financial Holdings, Inc. 2010 Inducement Stock Plan (the “Inducement Plan”) for the purposes of granting equity awards to new employees as an inducement to join the Company. The Company reserved 1,245,000 shares of the Company’s common stock for issuance under the Inducement Plan. The terms of the Inducement Plan are substantially similar to the terms of the 2009 Plan. During 2013, the Company issued an additional 30,887 shares under this plan in conjunction with an executive attaining certain performance metrics for previously-awarded shares. During 2014, the Company issued an additional 637,804 shares under this plan in conjunction with the Bank’s acquisition of Banyan. During 2015, the Company issued 22,936 shares under this plan in conjunction with an executive new hire. At December 31, 2015, the Inducement Plan had 164,687 shares reserved and available for issuance. The Company maintains a qualified Employee Stock Purchase Plan (“the ESPP”). Under the ESPPs, eligible employees may purchase common stock of the Company at 85 percent of the lower of the closing price of the Company’s common stock on the first or last day of a six month purchase period on The NASDAQ® Global Select Market. Employees pay for their stock purchases through payroll deductions at a rate equal to any whole percentage from 1 percent to 15 percent of after-tax earnings. Participants have a right to a full reimbursement of ESPP deferrals through the end of the offering period. Such a reimbursement would result in a reversal of the compensation expense previously recorded, attributed to that participant. The Company issues shares under the ESPP in January and July of each year. As of December 31, 2015, there were 943,645 shares available for issuance in the ESPP. There were 138,463 shares issued to participants under the qualified ESPP in 2015. Share-based payments recorded in salaries and benefits expense are as follows: Year Ended December 31, 2015 2014 2013 (In thousands) Stock option and ESPP expense $ 518 $ 653 $ 987 Nonvested share expense 5,723 5,339 4,747 Subtotal 6,241 5,992 5,734 Tax benefit 2,367 2,311 2,210 Stock-based compensation expense, net of tax benefit $ 3,874 $ 3,681 $ 3,524 The fair value of each stock option award is estimated on the date of grant using the Black-Scholes option pricing model that uses the assumptions noted in the table below. Expected volatility is determined based on historical volatility of the Company’s stock, historical volatility of industry peers, and other factors. The Company uses historical data to estimate employee option exercise behavior and post-vesting cancellation for use in determining the expected life assumption. The risk-free rate is determined on the grant date of each award using the yield on a U.S. Treasury zero-coupon issue with a remaining term that approximates the expected term for the award. The dividend yield is based on expectations of future dividends paid by the Company and the market price of the Company’s stock on the date of grant. Compensation expense is recognized using the straight-line method over the vesting period of the option or the retirement eligible date, whichever is shorter. Options issued to retirement eligible employees are expensed on the date of grant. No options were issued in 2015, 2014, or 2013. Stock Options A summary of option activity under the 2009 Plan for the year ended December 31, 2015 is as follows: Shares Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term in Years Aggregate Intrinsic Value (in 000’s) Outstanding at December 31, 2014 1,634,302 $ 17.10 Granted — $ — Exercised 159,219 $ 8.16 Forfeited 2,852 $ 9.05 Expired 249,280 $ 26.98 Outstanding at December 31, 2015 1,222,951 $ 16.27 2.52 years $ 2,520.1 Exercisable at December 31, 2015 1,222,951 $ 16.27 2.52 years $ 2,520.1 The total intrinsic value of options exercised during the years ended December 31, 2015 , 2014 , and 2013 was $0.7 million , $1.1 million , and $0.8 million , respectively. As of December 31, 2015 , there was no unrecognized compensation cost related to stock option arrangements granted under the 2009 Plan. Restricted Stock A summary of the Company’s nonvested shares as of December 31, 2015 and changes during the year ended December 31, 2015 , including shares under both the 2009 Plan and the Inducement Plan, is as follows: Shares Weighted- Average Grant-Date Fair Value Nonvested at December 31, 2014 2,542,035 $ 10.76 Granted 738,025 $ 12.41 Vested 614,285 $ 8.68 Forfeited 429,392 $ 11.53 Nonvested at December 31, 2015 2,236,383 $ 11.72 The fair value of nonvested shares is determined based on the closing price of the Company’s stock on the grant date. The weighted-average grant-date fair value of shares granted during the years ended December 31, 2015 , 2014 , and 2013 was $12.41 , $12.42 , and $9.79 , respectively. At December 31, 2015 , there was $12.0 million of total unrecognized compensation cost related to nonvested share-based compensation arrangements under the 2009 Plan and the Inducement Plan, combined. That cost is expected to be recognized over a weighted-average period of 2.0 years . The total fair value of shares that vested during the years ended December 31, 2015 , 2014 , and 2013 was $5.3 million , $5.1 million , and $6.1 million , respectively. Included in the restricted stock balances above are performance shares, which are granted to certain employees within the Company and are accounted for in the same manner as restricted stock. At December 31, 2015 , there were 848,700 performance shares outstanding, which could increase up to 1,527,660 shares. If the maximum number of performance shares is issued, the Company would incur an additional $7.8 million of compensation costs related to these additional 678,960 shares. The Company recognizes the expense for performance shares based upon the most likely outcome of shares to be issued based on current forecasts. Supplemental Executive Retirement Plans The Company has a non-qualified supplemental executive retirement plan (“SERP”) with a former executive officer of the Company. The SERP, which is unfunded, provides a defined cash benefit based on a formula using average compensation, years of service, and age at retirement of the executive. The estimated actuarial present value of the projected benefit obligation was $8.3 million and $8.4 million at December 31, 2015 and 2014 , respectively. The expense associated with the SERP was $0.5 million , $1.0 million , and $1.4 million for the years ended December 31, 2015 , 2014 , and 2013 , respectively. The discount rate used to calculate the SERP liability was 4.35% , 3.85% , and 4.65% for the years ended December 31, 2015 , 2014 , and 2013 , respectively. The Bank has a SERP with various former executives of the Pacific Northwest market. The SERP, which is unfunded, provides a defined cash benefit based on a formula using compensation, years of service, and age at retirement of the executives. The benefits for each executive under the plan are accrued until the full vesting age of 65. The actuarial present value of the projected benefit obligation was $3.2 million and $2.8 million at December 31, 2015 and 2014 , respectively. The expense associated with the SERP was $0.2 million , $0.2 million , and $0.1 million for the years ended December 31, 2015 , 2014 , and 2013 , respectively. The discount rate used to calculate the SERP liability was 3.81% , 3.45% , and 4.25% , for the years ended December 31, 2015 , 2014 , and 2013 , respectively. KLS has a long term incentive plan (“LTIP”) with certain of its managing directors. This LTIP, which is unfunded, provides for a profit sharing based on current year results as well as a cash benefit at the time of separation of service. The cash payment at separation of service, which is determined based on the profit share and a multiple based on years of service, is payable in three equal annual installments following separation of service. The Company has accrued $7.9 million and $7.4 million at December 31, 2015 and 2014 , respectively, for future separation of service payments. The LTIP was effective beginning January 1, 2010. The expense associated with the LTIP was $1.3 million , $1.9 million , and $1.7 million for the years ended December 31, 2015 , 2014 , and 2013 , respectively. The discount rate used to calculate the SERP liability was 3.90% , 3.80% , and 4.25% for the years ended December 31, 2015 , 2014 , and 2013 , respectively.

Other Operating Expense

Other Operating Expense	12 Months Ended
	Dec. 31, 2015
OTHER OPERATING EXPENSE [Abstract]
Other Income and Other Expense Disclosure [Text Block]	OTHER OPERATING EXPENSE Major components of other operating expense are as follows: Year Ended December 31, 2015 2014 2013 (In thousands) Insurance $ 3,518 $ 2,851 $ 3,065 Employee travel and meals 2,874 2,250 2,396 Other banking expenses 1,788 1,091 1,139 Telephone 1,661 1,589 1,338 Forms and supplies 1,241 838 997 Postage, express mail, and courier 1,007 978 1,059 Publications and dues 870 795 727 Training and education 686 554 372 OREO expenses 197 176 363 Legal settlement costs 150 48 500 Prepayment penalties on repurchase of FHLB borrowings and repurchase agreements — 808 1,781 Provision for off balance sheet loan commitments (271 ) 50 290 Other 2,501 2,100 3,038 Total $ 16,222 $ 14,128 $ 17,065

Reportable Segments

Reportable Segments	12 Months Ended
	Dec. 31, 2015
Segment Reporting [Abstract]
Segment Reporting Disclosure [Text Block]	REPORTABLE SEGMENTS Management Reporting The Company has four reportable segments: Private Banking, Wealth Management and Trust, Investment Management, and Wealth Advisory, and the Parent Company (Boston Private Financial Holdings, Inc.) (the “Holding Company”). The financial performance of the Company is managed and evaluated by these four areas. The segments are managed separately as a result of the concentrations in each function. The Company’s Segment Chief Executive Officers (“CEOs”) manage the segments and have full authority and responsibility for the performance and the allocation of resources within their respective segments. The Company’s CEO is the Company’s Chief Operating Decision Maker (“CODM”) . The day to day activities of the affiliates are managed by the affiliate CEOs, except in the Private Banking segment. The Company’s CEO is also the Bank’s CEO. The president of the Bank is the Private Banking Segment CEO and reports to the Company CEO. The Segment CEOs have authority with respect to the allocation of capital within their segments, management oversight responsibility, performance assessments, and overall authority and accountability for all of the affiliates, if any, within their segment. The Segment CEO for the non-banks communicates with the affiliate CEOs regarding profit and loss responsibility, strategic planning, priority setting and other matters. The Holding Company’s Chief Financial Officer reviews all affiliate financial detail with the CODM on a monthly basis. Description of Reportable Segments Private Banking The Private Banking segment operates primarily in three geographic markets: New England, San Francisco Bay, and Southern California. The Bank currently conducts business under the name of Boston Private Bank & Trust Company in all markets. The Bank is chartered by The Commonwealth of Massachusetts and is insured by the Federal Deposit Insurance Corporation (the “FDIC”). The Bank is principally engaged in providing private banking services to high net worth individuals, privately owned businesses, private partnerships, and nonprofit organizations. In addition, the Bank is an active provider of financing for affordable housing, first-time homebuyers, economic development, social services, community revitalization and small businesses. Wealth Management and Trust The Wealth Management and Trust segment is comprised of the trust operations of Boston Private Bank and the operations of Boston Private Wealth. Boston Private Wealth combines Boston Private Bank’s existing wealth management business and the business of Banyan, which Boston Private Bank purchased in the fourth quarter of 2014. The segment offers investment management, wealth management, family office, and trust services to individuals, families, and institutions. The Wealth Management and Trust segment operates in New England; South Florida; Texas; California; Atlanta, Georgia; and Madison, Wisconsin. For comparative purposes, the Wealth Management and Trust data that was previously included within the Private Banking segment has been stated separately for the periods presented in the table below. See Part II. Item 8. “Financial Statements and Supplementary Data - Note 3: Acquisitions, Asset Sales, and Divestitures” for additional details on the acquisition of Banyan. Investment Management The Investment Management segment has two consolidated affiliates, including DGHM and Anchor, both of which are registered investment advisers (“RIAs”). The Investment Managers serve the needs of pension funds, endowments, trusts, foundations and select institutions, mutual funds and high net worth individuals and their families throughout the U.S. and abroad. The Investment Managers specialize in value-driven equity portfolios with products across the capitalization spectrum. The specific mix of products, services and clientele varies between affiliates. The Investment Managers are located in New England and New York, with one affiliate administrative office in South Florida. Wealth Advisory The Wealth Advisory segment has two consolidated affiliates, including KLS and BOS, both of which are RIAs and wealth management firms. The Wealth Advisors provide comprehensive, planning-based financial strategies to high net worth individuals and their families, and non-profit institutions. The services the firms offer include fee-only financial planning, tax planning, tax preparation, estate and insurance planning, retirement planning, charitable planning and intergenerational gifting and succession planning. The Wealth Advisors manage investments covering a wide range of asset classes for both taxable and tax-exempt portfolios. The Wealth Advisors are located in New York, Southern California and Northern California. Measurement of Segment Profit and Assets The accounting policies of the segments are the same as those described in Part II. Item 8. “Financial Statements and Supplementary Data - Note 1: Basis of Presentation and Summary of Significant Accounting Policies.” Reconciliation of Reportable Segment Items The following tables present a reconciliation of the revenues, profits, assets, and other significant items of reportable segments as of and for the year ended December 31, 2015 , 2014 , and 2013 . Interest expense on junior subordinated debentures is reported at the Holding Company. Year ended December 31, 2015 2014 2013 Private Banking (In thousands) Net interest income $ 189,501 $ 183,424 $ 178,199 Fees and other income (1) 11,352 10,617 22,454 Total revenues 200,853 194,041 200,653 Provision/ (credit) for loan losses (1,555 ) (6,400 ) (10,000 ) Operating expense 116,575 111,901 118,488 Income before income taxes 85,833 88,540 92,165 Income tax expense (3) 27,844 29,032 30,958 Net income from continuing operations 57,989 59,508 61,207 Net income attributable to the Company $ 57,989 $ 59,508 $ 61,207 Assets $ 7,361,202 $ 6,611,191 $ 6,246,148 Amortization of intangibles $ 341 $ 219 $ 277 Depreciation $ 4,599 $ 5,294 $ 5,350 Year ended December 31, 2015 2014 2013 Wealth Management and Trust (In thousands) Fees and other income $ 53,336 $ 34,584 $ 26,547 Total revenues 53,336 34,584 26,547 Operating expense (2) 54,474 29,401 20,733 Income before income taxes (1,138 ) 5,183 5,814 Income tax expense (3) (350 ) 2,201 2,392 Net income from continuing operations (788 ) 2,982 3,422 Net income attributable to the Company $ (788 ) $ 2,982 $ 3,422 Assets $ 80,088 $ 80,467 $ 4,939 AUM $ 7,976,000 $ 9,274,000 $ 4,565,000 Amortization of intangibles $ 2,428 $ 676 $ — Depreciation $ 772 $ 241 $ 105 Year ended December 31, 2015 2014 2013 Investment Management (In thousands) Net interest income $ 22 $ 22 $ 20 Fees and other income 45,687 47,119 43,875 Total revenues 45,709 47,141 43,895 Operating expense 33,690 34,848 33,195 Income before income taxes 12,019 12,293 10,700 Income tax expense (3) 3,956 4,078 3,493 Net income from continuing operations 8,063 8,215 7,207 Noncontrolling interests 2,265 2,519 2,164 Net income attributable to the Company $ 5,798 $ 5,696 $ 5,043 Assets $ 92,642 $ 100,229 $ 100,609 AUM $ 9,952,000 $ 10,772,000 $ 10,401,000 Amortization of intangibles $ 2,956 $ 2,955 $ 3,058 Depreciation $ 286 $ 240 $ 221 Year ended December 31, 2015 2014 2013 Wealth Advisory (In thousands) Net interest income $ 6 $ 10 $ 66 Fees and other income 50,558 48,199 42,350 Total revenues 50,564 48,209 42,416 Operating expense 35,379 33,213 29,588 Income before income taxes 15,185 14,996 12,828 Income tax expense (3) 5,819 5,653 4,807 Net income from continuing operations 9,366 9,343 8,021 Noncontrolling interests 2,138 2,189 1,784 Net income attributable to the Company $ 7,228 $ 7,154 $ 6,237 Assets $ 79,543 $ 80,804 $ 73,972 AUM $ 9,688,000 $ 9,883,000 $ 9,336,000 Amortization of intangibles $ 986 $ 986 $ 992 Depreciation $ 864 $ 488 $ 363 Year ended December 31, 2015 2014 2013 Holding Company and Eliminations (In thousands) Net interest income $ (3,759 ) $ (3,755 ) $ (4,267 ) Fees and other income 236 279 1,115 Total revenues (3,523 ) (3,476 ) (3,152 ) Operating expense 15,063 17,766 18,701 Income/ (loss) before income taxes (18,586 ) (21,242 ) (21,853 ) Income tax expense/(benefit) (3) (6,877 ) (8,599 ) (8,687 ) Net income/(loss) from continuing operations (11,709 ) (12,643 ) (13,166 ) Noncontrolling interests 4 42 — Discontinued operations (4) 6,411 6,160 7,792 Net income/(loss) attributable to the Company $ (5,302 ) $ (6,525 ) $ (5,374 ) Assets $ (70,967 ) $ (74,817 ) $ 11,441 AUM $ (21,000 ) $ (22,000 ) $ (22,000 ) Depreciation $ 69 $ 205 $ 196 Year ended December 31, 2015 2014 2013 Total Company (In thousands) Net interest income $ 185,770 $ 179,701 $ 174,018 Fees and other income 161,169 140,798 136,341 Total revenues 346,939 320,499 310,359 Provision/ (credit) for loan losses (1,555 ) (6,400 ) (10,000 ) Operating expense 255,181 227,129 220,705 Income before income taxes 93,313 99,770 99,654 Income tax expense (3) 30,392 32,365 32,963 Net income from continuing operations 62,921 67,405 66,691 Noncontrolling interests 4,407 4,750 3,948 Discontinued operations 6,411 6,160 7,792 Net income attributable to the Company $ 64,925 $ 68,815 $ 70,535 Assets $ 7,542,508 $ 6,797,874 $ 6,437,109 AUM $ 27,595,000 $ 29,907,000 $ 24,280,000 Amortization of intangibles $ 6,711 $ 4,836 $ 4,327 Depreciation $ 6,590 $ 6,468 $ 6,235 ___________________ (1) Included in Private Banking non-interest income for the year ended December 31, 2013 is the $10.6 million gain on sale of the Bank’s three offices in the Pacific Northwest. (2) Operating expense for 2015 includes $3.7 million in restructuring expenses related to the Wealth Management and Trust segment. Operating expense for 2014 includes $0.7 million restructuring expenses. Operating expense for 2013 includes no restructuring expenses. (3) The Company’s effective tax rate for 2015 , 2014 , and 2013 are not consistent due to earnings from tax-exempt investments, non-deductible compensation, state and local taxes, income tax credits and income attributable to noncontrolling interests having a different impact on the effective tax rate due primarily to the different levels of income before taxes in years 2015 , 2014 , and 2013 . See Part II. Item 8. “Financial Statements and Supplementary Data - Note 17: Income Taxes” for additional details. (4) Net income from discontinued operations for the years ended December 31, 2015 , 2014 and 2013 of $6.4 million , $6.2 million , and $7.8 million , respectively, are included in Holding Company and Eliminations in the calculation of net income attributable to the Company.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2015
Fair Value [Abstract]
Fair Value Disclosures [Text Block]	FAIR VALUE OF FINANCIAL INSTRUMENTS Fair value is defined under GAAP as the exchange price that would be received to sell an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants on the measurement date. The Company determines the fair values of its financial instruments based on the fair value hierarchy established in ASC 820, Fair Value Measurements and Disclosures (“ASC 820”), which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. ASC 820 describes three levels of inputs that may be used to measure fair value. Financial instruments are considered Level 1 when valuation can be based on quoted prices in active markets for identical assets or liabilities. Level 2 financial instruments are valued using quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or models using inputs that are observable or can be corroborated by observable market data of substantially the full term of the assets or liabilities. Financial instruments are considered Level 3 when their values are determined using pricing models, discounted cash flow methodologies or similar techniques and at least one significant model assumption or input is unobservable and when determination of the fair value requires significant management judgment or estimation. The following tables present the Company’s assets and liabilities measured at fair value on a recurring basis as of December 31, 2015 and 2014 , aggregated by the level in the fair value hierarchy within which those measurements fall: As of December 31, 2015 Fair value measurements at reporting date using: Quoted prices in active markets for identical assets (Level 1) Significant other observable inputs (Level 2) Significant unobservable inputs (Level 3) (In thousands) Assets: Available-for-sale securities U.S. government and agencies $ 21,251 $ 20,251 $ 1,000 $ — Government-sponsored entities 344,562 — 344,562 — Municipal bonds 268,644 — 268,644 — Mortgage-backed securities 427,041 — 427,041 — Other 23,012 23,012 — — Total available-for-sale securities 1,084,510 43,263 1,041,247 — Derivatives - interest rate customer swaps 7,960 — 7,960 — Other investments 5,602 5,602 — — Liabilities: Derivative - interest rate customer swaps $ 8,084 $ — $ 8,084 $ — Derivatives - interest rate swaps 1,907 — 1,907 — Derivatives - risk participation agreement 11 — 11 — Other liabilities 5,602 5,602 — — As of December 31, 2014 Fair value measurements at reporting date using: Quoted prices in active markets for identical assets (Level 1) Significant other observable inputs (Level 2) Significant unobservable inputs (Level 3) (In thousands) Assets: Available-for-sale securities: U.S. government and agencies $ 16,882 $ 15,377 $ 1,505 $ — Government-sponsored entities 274,253 — 274,253 — Municipal bonds 235,248 — 235,248 — Mortgage-backed securities 283,704 — 283,704 — Other 19,906 19,906 — — Total available-for-sale securities 829,993 35,283 794,710 — Derivatives - interest rate customer swaps 5,323 — 5,323 — Derivatives - interest rate swaps 34 — 34 — Other investments 5,437 5,437 — — Liabilities: Derivatives - interest rate customer swaps $ 5,434 $ — $ 5,434 $ — Derivatives - interest rate swaps 1,584 — 1,584 — Derivatives-junior subordinated debenture interest rate swap 1,768 — 1,768 — As of December 31, 2015 and 2014, available-for-sale securities consisted primarily of U.S. government and agency securities, government-sponsored entities securities, municipal bonds, mortgage-backed securities, and other available-for-sale securities. The equities (which are categorized as other available-for-sale securities) are valued with prices quoted in active markets. Three U.S. Treasury securities at December 31, 2015 and two U.S. Treasury securities at December 31, 2014, are valued with prices quoted in active markets. Therefore, they have been categorized as a Level 1 measurement. The government-sponsored entities securities, municipal bonds, mortgage-backed securities, and certain investments in Small Business Administration (“SBA”) loans (which are categorized as U.S. government and agencies securities) generally have quoted prices but are traded less frequently than exchange-traded securities and can be priced using market data from similar assets. Therefore, they have been categorized as a Level 2 measurement. No investments held at December 31, 2015 or 2014 were categorized as Level 3. The Company uses interest rate customer swaps, interest rate swaps, risk participation agreements, and a junior subordinated debenture interest rate swap to manage its interest rate risk, and customer foreign exchange forward contracts to manage its foreign exchange risk, if any. The junior subordinated debenture interest rate swap agreement matured on December 30, 2015. The valuation of these instruments is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves and implied volatilities. Therefore, they have been categorized as a Level 2 measurement as of December 31, 2015 and 2014 . See Part II. Item 8. “Financial Statements and Supplementary Data - Note 9: Derivatives and Hedging Activities” for further details. To comply with the provisions of ASC 820, the Company incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, the Company has considered the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts and guarantees. Counterparty exposure is evaluated by netting positions that are subject to master netting agreements, as well as considering the amount of collateral securing the position. The Company has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy, although the credit valuation adjustments associated with its derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by itself and its counterparties. As a result, the Company has determined that its derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy as of December 31, 2015 and 2014 . Other investments, which are not considered available-for-sale investments, consist of deferred compensation trusts, which consist of publicly traded mutual fund investments that are valued at prices quoted in active markets. Therefore, they have been categorized as a Level 1 measurement as of December 31, 2015 and 2014 . The remaining other investments categorized as Level 2 consist of the Company’s cost-method investments as of December 31, 2015 and 2014 . There were no Level 3 assets at December 31, 2015 or 2014 . The following tables present the Company’s assets and liabilities measured at fair value on a non-recurring basis during the periods ended December 31, 2015 and 2014 , respectively, aggregated by the level in the fair value hierarchy within which those measurements fall. As of December 31, 2015 Fair value measurements at reporting date using: Gain (losses) from fair value changes Quoted prices in active markets for identical assets (Level 1) Significant other observable inputs (Level 2) Significant unobservable inputs (Level 3) Year ended December 31, 2015 (In thousands) Assets: Impaired loans (1) $ 2,322 $ — $ — $ 2,322 $ (514 ) $ 2,322 $ — $ — $ 2,322 $ (514 ) ___________________ (1) Collateral-dependent impaired loans held at December 31, 2015 that had write-downs in fair value or whose specific reserve changed during 2015. As of December 31, 2014 Fair value measurements at reporting date using: Gain (losses) from fair value changes Quoted prices in active markets for identical assets (Level 1) Significant other observable inputs (Level 2) Significant unobservable inputs (Level 3) Year ended December 31, 2014 (In thousands) Assets: Impaired loans (1) $ 10,094 $ — $ — $ 10,094 $ (3,925 ) $ 10,094 $ — $ — $ 10,094 $ (3,925 ) ___________________ (1) Collateral-dependent impaired loans held at December 31, 2014 that had write-downs in fair value or whose specific reserve changed during 2014. The following table presents additional quantitative information about assets measured at fair value on a non-recurring basis for which the Company has utilized Level 3 inputs to determine fair value. As of December 31, 2015 Fair Value Valuation technique Unobservable Input Range of Inputs Utilized Weighted Average of Inputs Utilized (In thousands) Impaired Loans $ 2,322 Appraisals of Collateral Discount for costs to sell 7% - 24% 12% Appraisal adjustments 20% - 25% 21% As of December 31, 2014 Fair Value Valuation technique Unobservable Input Range of Inputs Utilized Weighted Average of Inputs Utilized (In thousands) Impaired Loans $ 10,094 Appraisals of Collateral Discount for costs to sell 0% - 10% 3% Appraisal adjustments 0% - 25% 2% Impaired loans include those loans that were adjusted to the fair value of underlying collateral as required under ASC 310, Receivables . The amount does not include impaired loans that are measured based on expected future cash flows discounted at the respective loan’s original effective interest rate, as that amount is not considered a fair value measurement. The Company uses appraisals, which management may adjust to reflect estimated fair value declines, or apply other discounts to appraised values for unobservable factors resulting from its knowledge of the property or consideration of broker quotes. The appraisers use a market, income, and/or a cost approach in determining the value of the collateral. Therefore they have been categorized as a Level 3 measurement. The following tables present the carrying values and fair values of the Company’s financial instruments that are not measured at fair value on a recurring basis (other than certain loans, as noted below): As of December 31, 2015 Book Value Fair Value Quoted prices in active markets for identical assets (Level 1) Significant other observable inputs (Level 2) Significant unobservable inputs (Level 3) (In thousands) FINANCIAL ASSETS: Cash and cash equivalents $ 238,694 $ 238,694 $ 238,694 $ — $ — Investment securities held-to-maturity 116,352 116,384 — 116,384 — Loans held for sale 8,072 8,144 — 8,144 — Loans, net 5,640,712 5,658,254 — — 5,658,254 Other financial assets 118,233 118,233 — 118,233 — FINANCIAL LIABILITIES: Deposits 6,040,437 6,041,239 — 6,041,239 — Securities sold under agreements to repurchase 58,215 58,215 — 58,215 — Federal Home Loan Bank borrowings 461,324 465,100 — 465,100 — Junior subordinated debentures 106,363 96,363 — — 96,363 Other financial liabilities 1,978 1,978 — 1,978 — As of December 31, 2014 Book Value Fair Value Quoted prices Significant Significant (In thousands) FINANCIAL ASSETS: Cash and cash equivalents $ 172,609 $ 172,609 $ 172,609 $ — $ — Investment securities held-to-maturity 140,727 142,339 — 142,339 — Loans held for sale 7,099 7,239 — 7,239 — Loans, net 5,194,098 5,130,843 — — 5,130,843 Other financial assets 114,686 114,686 — 114,686 — FINANCIAL LIABILITIES: Deposits 5,453,879 5,457,117 — 5,457,117 — Securities sold under agreements to repurchase 30,496 30,493 — 30,493 — Federal Home Loan Bank borrowings 370,150 376,320 — 376,320 — Junior subordinated debentures 106,363 96,363 — — 96,363 Other financial liabilities 7,357 7,357 — 7,357 — The estimated fair values have been determined by using available quoted market information or other appropriate valuation methodologies. The aggregate fair value amounts presented do not represent the underlying value of the Company taken as a whole. The fair value estimates provided are made at a specific point in time, based on relevant market information and the characteristics of the financial instrument. The estimates do not provide for any premiums or discounts that could result from concentrations of ownership of a financial instrument. Because no active market exists for some of the Company’s financial instruments, certain fair value estimates are based on subjective judgments regarding current economic conditions, risk characteristics of the financial instruments, future expected loss experience, prepayment assumptions, and other factors. The resulting estimates involve uncertainties and therefore cannot be determined with precision. Changes made to any of the underlying assumptions could significantly affect the estimates. Cash and cash equivalents The carrying value reported in the balance sheets for cash and cash equivalents approximates fair value due to the short-term nature of their maturities and are classified as Level 1. Held-to-maturity investment securities Held-to-maturity securities currently include mortgage-backed securities. All held-to-maturity securities are fixed income instruments that are not quoted on an exchange, but may be traded in active markets. The fair value of these securities is based on quoted market prices obtained from external pricing services. The principal market for our securities portfolio is the secondary institutional market, with an exit price that is predominantly reflective of bid level pricing in that market. Accordingly, held-to-maturity securities are included in the Level 2 fair value category. Loans held for sale Loans held for sale are recorded at the lower of cost or fair value in the aggregate. Fair value estimates are based on actual commitments to sell the loans to investors at an agreed upon price or current market prices if rates have changed since the time the loan closed. Accordingly, loans held for sale are included in the Level 2 fair value category. Loans, net Fair value estimates are based on loans with similar financial characteristics. Fair values of commercial and residential mortgage loans are estimated by discounting contractual cash flows adjusted for prepayment estimates and using discount rates approximately equal to current market rates on loans with similar credit and interest rate characteristics and maturities. The fair value estimates for home equity and other loans are based on outstanding loan terms and pricing in the local markets. The method of estimating the fair value of the loans disclosed in the table above does not incorporate the exit price concept in the presentation of the fair value of these financial instruments. Net loans are included in the Level 3 fair value category based upon the inputs and valuation techniques used. Other financial assets Other financial assets consist of accrued interest and fees receivable, stock in Federal Home Loan Banks (“FHLBs”), and the cash surrender value of bank-owned life insurance, for which the carrying amount approximates fair value, and are classified as Level 2. Deposits The fair values reported for transaction accounts (demand, NOW, savings, and money market) equal their respective book values reported on the balance sheets and are classified as Level 2. The fair values disclosed are, by definition, equal to the amount payable on demand at the reporting date. The fair values for certificates of deposit are based on the discounted value of contractual cash flows. The discount rates used are representative of approximate rates currently offered on certificates of deposit with similar remaining maturities and are classified as Level 2. Securities sold under agreements to repurchase The fair value of securities sold under agreements to repurchase are estimated based on contractual cash flows discounted at the Bank’s incremental borrowing rate for FHLB borrowings with similar maturities and have been classified as Level 2. Federal Home Loan Bank borrowings The fair value reported for FHLB borrowings is estimated based on the discounted value of contractual cash flows. The discount rate used is based on the Bank’s estimated current incremental borrowing rate for FHLB borrowings of similar maturities and have been classified as Level 2. Junior subordinated debentures The fair value of the junior subordinated debentures issued by Boston Private Capital Trust I and Boston Private Capital Trust II were estimated using Level 3 inputs such as the interest rates on these securities, current rates for similar debt, a consideration for illiquidity of trading in the debt, and regulatory changes that would result in an unfavorable change in the regulatory capital treatment of this type of debt. Other financial liabilities Other financial liabilities consist of accrued interest payable and deferred compensation for which the carrying amount approximates fair value and are classified as Level 2. Financial instruments with off-balance sheet risk The Bank’s commitments to originate loans and for unused lines and outstanding letters of credit are primarily at market interest rates and therefore, the carrying amount approximates fair value.

Financial Instruments With Off-

Financial Instruments With Off-Balance Sheet Risk	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments Disclosure [Text Block]	FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK The Company is party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its clients. These financial instruments include commitments to originate loans, unadvanced portion of loans, unused lines of credit, standby letters of credit, commitments to sell loans, and rate locks related to loans that if originated will be held for sale. The instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the consolidated balance sheets. The contract or notional amounts of those instruments reflect the extent of involvement the Company has in particular classes of financial instruments. The Company’s exposure to credit loss in the event of nonperformance by the other party to the financial instrument for loan commitments and standby letters of credit is represented by the contractual amount of those instruments. The Company uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. Commitments to originate loans, the unadvanced portion of loans, and the unused lines of credit are agreements to lend to a client, provided there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since certain commitments may expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Company evaluates each client’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Company upon extension of credit, is based on management’s credit evaluation of the borrower. Standby letters of credit are conditional commitments issued by the Company to guarantee the performance by a client to a third party. The credit risk involved in issuing standby letters of credit is essentially the same as that involved in extending loan facilities to clients. Loans sold to investors have recourse to the Company on any loans that are deemed to have been fraudulent or misrepresented. In addition, investors would require the Company to repurchase any loan sold which has a first payment default. The Bank did repurchase one loan from an investor in 2014 due to an underwriting discrepancy. The loan was transferred into the portfolio and is fully performing. The Company has not repurchased any other loans during the three years ended December 31, 2015. Financial instruments with off-balance sheet risk are summarized as follows: December 31, 2015 2014 (In thousands) Commitments to originate loans Variable rate $ 87,622 $ 133,965 Fixed rate 17,096 31,757 Total commitments to originate new loans $ 104,718 $ 165,722 Unadvanced portion of loans and unused lines of credit $ 1,181,114 $ 1,092,838 Standby letters of credit $ 39,245 $ 33,685 Forward commitments to sell loans $ 28,468 $ 18,977

Boston Private Financial Holdin

Boston Private Financial Holdings, Inc. (Parent Company Only)	12 Months Ended
	Dec. 31, 2015
BOSTON PRIVATE FINANCIAL HOLDINGS, INC. (PARENT COMPANY ONLY) [Abstract]
Condensed Financial Information of Parent Company Only Disclosure [Text Block]	BOSTON PRIVATE FINANCIAL HOLDINGS, INC. (PARENT COMPANY ONLY) CONDENSED BALANCE SHEETS December 31, 2015 December 31, 2014 (In thousands) Assets: Cash and cash equivalents $ 55,385 $ 44,593 Investment in wholly-owned and majority-owned subsidiaries: Bank 671,204 633,905 Non-banks 138,178 144,454 Investment in partnerships and trusts 6,340 6,340 Deferred income taxes 1,460 — Other assets 14,243 17,061 Total assets $ 886,810 $ 846,353 Liabilities: Junior subordinated debentures $ 106,363 $ 106,363 Other liabilities 15,746 15,174 Total liabilities 122,109 121,537 Redeemable Noncontrolling Interests (1) 21,481 21,291 Total Shareholders’ Equity 743,220 703,525 Total liabilities, redeemable noncontrolling interests and shareholders’ equity $ 886,810 $ 846,353 ___________________ (1) Includes noncontrolling interests and the maximum redemption value of redeemable noncontrolling interests. CONDENSED STATEMENTS OF OPERATIONS Year ended December 31, 2015 2014 2013 (In thousands) Income: Interest income $ 116 $ 115 $ 140 Gain on repurchase of debt — — 620 Dividends from subsidiaries: Bank 22,700 26,500 27,900 Non-banks 28,789 20,356 24,045 Other income 236 279 496 Total income 51,841 47,250 53,201 Operating Expense: Salaries and employee benefits 10,320 11,876 11,888 Professional fees 2,007 2,965 3,064 Interest expense 3,875 3,872 4,408 Other expenses 2,740 2,966 3,749 Total operating expense 18,942 21,679 23,109 Income before income taxes 32,899 25,571 30,092 Income tax benefit (6,877 ) (8,599 ) (8,688 ) Net income from discontinued operations 6,411 6,160 7,792 Income before equity in undistributed earnings of subsidiaries 46,187 40,330 46,572 Equity in undistributed earnings of subsidiaries 18,738 28,485 23,963 Net income attributable to the Company $ 64,925 $ 68,815 $ 70,535 CONDENSED STATEMENTS OF CASH FLOWS Year ended December 31, 2015 2014 2013 (In thousands) Cash flows from operating activities: Net income attributable to the Company $ 64,925 $ 68,815 $ 70,535 Net income from discontinued operations 6,411 6,160 7,792 Net income from continuing operations 58,514 62,655 62,743 Adjustments to reconcile net income from continuing operations to net cash provided by/ (used in) operating activities: Equity in earnings of subsidiaries: Bank (57,201 ) (62,491 ) (64,628 ) Non-banks (13,026 ) (12,850 ) (11,280 ) Dividends from subsidiaries: Bank 22,700 26,500 27,900 Non-banks 28,789 20,356 24,045 Gain on repurchase of debt — — (620 ) Deferred income tax expense/ (benefit) (4,575 ) 4,642 4,873 Depreciation and amortization 5,097 1,743 3,187 Net decrease/ (increase) in other operating activities 2,167 (2,834 ) (6,630 ) Net cash provided by/ (used in) operating activities of continuing operations 42,465 37,721 39,590 Net cash provided by/ (used in) operating activities of discontinued operations 6,411 6,160 7,792 Net cash provided by/ (used in) operating activities 48,876 43,881 47,382 Cash flows from investing activities: Cash paid for acquisitions, including deferred acquisition obligations 1,821 — — Capital investments in subsidiaries: Bank — (29,007 ) — Non-banks (1,723 ) (1,497 ) (356 ) Cash received from divestitures — — 747 Net cash (used in)/ provided by in other investing activities 1 (98 ) (115 ) Net cash provided by/ (used in) investing activities of continuing operations 99 (30,602 ) 276 Net cash provided by/ (used in) investing activities of discontinued operations — — — Net cash provided by/ (used in) investing activities 99 (30,602 ) 276 Cash flows from financing activities: Repurchase of debt — — (35,536 ) Proceeds from issuance of Series D preferred stock, net — — 47,753 Repurchase of Series B preferred stock, including deemed dividend at repurchase — — (69,827 ) Dividends paid to common shareholders (29,608 ) (25,829 ) (19,129 ) Dividends paid to preferred shareholders (3,475 ) (3,475 ) (2,660 ) Tax savings/ (deficiency) from certain stock compensation awards (1,262 ) 1,294 (663 ) Proceeds from stock option exercises 1,206 1,807 2,332 Proceeds from issuance of common stock, net 160 32,387 4,583 Other equity adjustments (5,204 ) (7,424 ) (3,178 ) Net cash provided by/ (used in) financing activities of continuing operations (38,183 ) (1,240 ) (76,325 ) Net cash provided by/ (used in) financing activities of discontinued operations — — — Net cash provided by/ (used in) financing activities (38,183 ) (1,240 ) (76,325 ) Net (decrease)/ increase in cash and cash equivalents 10,792 12,039 (28,667 ) Cash and cash equivalents at beginning of year 44,593 32,554 61,221 Cash and cash equivalents at end of year $ 55,385 $ 44,593 $ 32,554

Regulatory Matters

Regulatory Matters	12 Months Ended
	Dec. 31, 2015
REGULATORY MATTERS [Abstract]
Regulatory Capital Requirements under Banking Regulations [Text Block]	REGULATORY MATTERS Wealth Management and Trust, Investment Management, and Wealth Advisory The Company’s Wealth Management and Trust, Investment Management, and Wealth Advisory businesses are highly regulated, primarily at the federal level by the SEC, and by state regulatory agencies. The Company has subsidiaries which are RIAs under the Investment Advisers Act of 1940. The Investment Advisers Act of 1940 imposes numerous obligations on RIAs, including fiduciary, record keeping, operational, and disclosure obligations. The subsidiaries, as investment advisers, are also subject to regulation under the federal and state securities laws and the fiduciary laws of certain states. In addition, the Company has subsidiaries which act as sub-advisers to mutual funds, which are registered under the Investment Company Act of 1940 and are subject to that Act’s provisions and regulations. The Company’s subsidiaries are also subject to the provisions and regulations of ERISA, to the extent any such entities act as a “fiduciary” under ERISA with respect to certain of its clients. ERISA and the related provisions of the federal tax laws impose a number of duties on persons who are fiduciaries under ERISA, and prohibit certain transactions involving the assets of each ERISA plan which is a client, as well as certain transactions by the fiduciaries and certain other related parties to such plans. Private Banking The Company and the Bank are subject to extensive supervision and regulation by the Federal Reserve, the FDIC, which insures the deposits of the Bank to the maximum extent permitted by law, and the Massachusetts Commissioner of Banks. The federal and state laws and regulations which are applicable to banks regulate, among other things, the scope of their business, their investments, their reserves against deposits, the timing of the availability of deposited funds, and the nature and amount of collateral for certain loans. The laws and regulations governing the Bank generally have been promulgated to foster the safety and soundness of the Bank and protect depositors, and not for the purpose of protecting shareholders of the Company. As of December 31, 2015, quantitative measures established by regulation to ensure capital adequacy required us to maintain minimum ratios of common equity Tier 1, Tier 1, and total capital (as defined in the regulations) to risk-weighted assets (as defined in the regulations) and of Tier 1 capital (as defined in the regulations) to average assets (as defined in the regulations). The following table presents the Company’s and the Bank’s amount of regulatory capital and related ratios as of December 31, 2015 and 2014 . Also presented are the minimum requirements established by the Federal Reserve and the FDIC as of those dates for the Company and the Bank, respectively, to meet applicable capital requirements and the requirements of the FDIC as of those dates for the Bank to be considered “well capitalized” under the FDIC’s prompt corrective action provisions. Effective January 1, 2015, revised regulatory rules issued by the Federal banking agencies, including the FDIC and the Federal Reserve, went into effect. The capital amounts and ratios disclosed in the table below are presented in accordance with these new rules from that date forward. The Federal Reserve, the FDIC, and the Massachusetts Division of Banks may impose higher capital ratios than those listed below based upon the results of regulatory exams. The Bank was categorized as “well capitalized” under the FDIC’s prompt corrective action provisions as of December 31, 2015 and 2014 . Actual For capital adequacy purposes (at least) To be well capitalized under prompt corrective action provisions (at least) Amount Ratio Amount Ratio Amount Ratio (In thousands) As of December 31, 2015 Common equity tier 1 risk-based capital Company $ 534,241 9.80 % $ 245,216 4.5 % n/a n/a Boston Private Bank 621,668 11.49 243,407 4.5 $ 351,588 6.5 % Tier 1 risk-based capital Company 686,160 12.59 326,954 6.0 n/a n/a Boston Private Bank 621,668 11.49 324,543 6.0 432,723 8.0 Total risk-based capital Company 754,758 13.85 435,939 8.0 n/a n/a Boston Private Bank 689,437 12.75 432,723 8.0 540,904 10.0 Tier 1 leverage capital Company 686,160 9.50 289,059 4.0 n/a n/a Boston Private Bank 621,668 8.68 286,461 4.0 358,077 5.0 As of December 31, 2014 Tier 1 risk-based capital Company $ 637,968 12.57 % $ 202,959 4.0 % n/a n/a Boston Private Bank 566,444 11.25 201,480 4.0 $ 302,220 6.0 % Total risk-based capital Company 701,705 13.83 405,918 8.0 n/a n/a Boston Private Bank 629,591 12.50 402,960 8.0 503,700 10.0 Tier 1 leverage capital Company 637,968 9.53 267,651 4.0 n/a n/a Boston Private Bank 566,444 8.55 265,077 4.0 331,346 5.0 ___________________ n/a = not applicable Bank regulatory authorities restrict the Bank from lending or advancing funds to, or investing in the securities of, the Company. Further, these authorities restrict the amounts available for the payment of dividends by the Bank to the Company. As of December 31, 2015, the Company has sponsored the creation of two statutory trusts for the sole purpose of issuing trust preferred securities and investing the proceeds in junior subordinated debentures of the Company. The Company has dissolved three statutory trusts, in August 2013, October 2013, and January 2014, respectively, after the Company repurchased all of the respective trusts’ trust preferred securities. In accordance with ASC 810-10-55, Consolidation - Overall - Implementation Guidance and Illustrations - Variable Interest Entities , these statutory trusts created by, or assumed by, the Company are not consolidated into the Company’s financial statements; however, the Company reflects the amounts of junior subordinated debentures payable to the preferred stockholders of statutory trusts as debt in its financial statements. As of both December 31, 2015 , and 2014 , all $100.0 million , of the net balance of these trust preferred securities qualified as Tier 1 capital.

Litigation and Contingencies

Litigation and Contingencies	12 Months Ended
	Dec. 31, 2015
LITIGATION AND CONTINGENCIES [Abstract]
Legal Matters and Contingencies [Text Block]	LITIGATION AND CONTINGENCIES The Company is involved in routine legal proceedings occurring in the ordinary course of business. In the opinion of management, final disposition of these proceedings will not have a material adverse effect on the consolidated balance sheets, consolidated statements of operations, or consolidated statements of cash flows of the Company.

Selected Quarterly Data (Unaudi

Selected Quarterly Data (Unaudited)	12 Months Ended
	Dec. 31, 2015
SELECTED QUARTERLY DATA (UNAUDITED) [Abstract]
Quarterly Financial Information [Text Block]	SELECTED QUARTERLY DATA (UNAUDITED) The following tables present selected quarterly financial data for 2015 and 2014 : 2015 (1) Fourth Quarter Third Quarter Second Quarter First Quarter (In thousands, except per share data) Revenues Net interest income $ 48,140 $ 46,473 $ 45,085 $ 46,072 Fees and other income 37,718 39,446 42,660 41,345 Total revenues 85,858 85,919 87,745 87,417 Provision/ (credit) for loan losses (1,655 ) 2,600 — (2,500 ) Operating expense 67,407 61,929 62,418 63,427 Income before income taxes 20,106 21,390 25,327 26,490 Income tax expense 5,638 8,182 8,000 8,572 Net income from discontinued operations 1,455 1,316 1,546 2,094 Less: Net income attributable to noncontrolling interests 921 994 1,263 1,229 Net income attributable to the Company $ 15,002 $ 13,530 $ 17,610 $ 18,783 Net earnings per share attributable to the Company’s common shareholders: Basic earnings per share (2) $ 0.17 $ 0.17 $ 0.20 $ 0.22 Diluted earnings per share (2) $ 0.17 $ 0.16 $ 0.20 $ 0.21 2014 (1) Fourth Quarter Third Quarter Second Quarter First Quarter (In thousands, except per share data) Revenues Net interest income $ 44,128 $ 44,783 $ 46,268 $ 44,522 Fees and other income 39,922 33,769 34,374 32,733 Total revenues 84,050 78,552 80,642 77,255 Provision/ (credit) for loan losses 2,400 (2,600 ) (5,000 ) (1,200 ) Operating expense 63,760 53,999 54,402 54,968 Income before income taxes 17,890 27,153 31,240 23,487 Income tax expense 5,901 8,993 10,333 7,138 Net income from discontinued operations 1,510 1,272 1,450 1,928 Less: Net income attributable to noncontrolling interests 1,322 1,167 1,025 1,236 Net income attributable to the Company $ 12,177 $ 18,265 $ 21,332 $ 17,041 Net earnings per share attributable to the Company’s common shareholders: Basic earnings per share (2) $ 0.14 $ 0.22 $ 0.26 $ 0.20 Diluted earnings per share (2) $ 0.13 $ 0.22 $ 0.25 $ 0.20 ___________________ (1) Due to rounding, the sum of the four quarters may not add to the year to date total. (2) Includes the effect of adjustments to net income attributable to the Company to arrive at net income attributable to common shareholders.

Basis of Presentation and Sum35

Basis of Presentation and Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2015
Basis of Presentation and Significant Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	Boston Private Financial Holdings, Inc. (the “Company” or “BPFH”), is a bank holding company (the “Holding Company”) with four reportable segments: Private Banking, Wealth Management and Trust, Investment Management, and Wealth Advisory. The Private Banking segment is comprised of the banking operations of Boston Private Bank & Trust Company (the “Bank” or “Boston Private Bank”), a trust company chartered by The Commonwealth of Massachusetts, insured by the Federal Deposit Insurance Corporation (the “FDIC”), and a wholly-owned subsidiary of the Company. Boston Private Bank currently operates in three geographic markets: New England, San Francisco Bay, and Southern California. The Wealth Management and Trust segment is comprised of Boston Private Wealth LLC (“Boston Private Wealth”), which was created from Boston Private Bank’s existing wealth management business as well as the acquisition of Banyan Partners, LLC (“Banyan”), which Boston Private Bank purchased in the fourth quarter of 2014. This segment also includes the trust operations of Boston Private Bank. The segment offers investment management, wealth management, family office, and trust services to individuals, families, and institutions. The Wealth Management and Trust segment operates in New England; South Florida; Texas; California; Atlanta, Georgia; and Madison, Wisconsin. For comparative purposes, the Wealth Management and Trust data that was previously included within the Private Banking segment has been reclassified into the Wealth Management and Trust segment. The Investment Management segment has two consolidated affiliates, consisting of Dalton, Greiner, Hartman, Maher & Co., LLC (“DGHM”) and Anchor Capital Advisors, LLC (“Anchor”) (together, the “Investment Managers”). The Wealth Advisory segment has two consolidated affiliates, consisting of KLS Professional Advisors Group, LLC (“KLS”) and Bingham, Osborn & Scarborough, LLC (“BOS”) (together, the “Wealth Advisors” and, together with the Wealth Management and Trust and Investment Management segments, the “Wealth and Investment” businesses). Basis of Presentation The consolidated financial statements of the Company include the accounts of the Company and its wholly-owned and majority-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation, and the portion of income allocated to owners other than the Company is included in “Net income attributable to noncontrolling interests” in the consolidated statements of operations. Redeemable noncontrolling interests in the consolidated balance sheets reflect the maximum redemption value of agreements with other owners. All accounts related to divested affiliates are included within the results of discontinued operations for all periods presented. The financial statements are prepared in accordance with accounting principles generally accepted in the United States (“U.S.”) (“GAAP”). Reclassifications of amounts in prior years’ consolidated financial statements are made whenever necessary to conform to the current year’s presentation.
Use of Estimates, Policy [Policy Text Block]	Use of Estimates In preparing the consolidated financial statements, management is required to make certain estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheet and revenues and expenses for the period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to change, in the near term, relate to the determination of the allowance for loan losses, evaluation of potential impairment of goodwill and other intangibles, and income tax estimates.
Concentration Risk, Credit Risk, Policy [Policy Text Block]	Significant Group Concentrations of Credit Risk Most of the Company’s activities are with clients within the New England, San Francisco Bay, and Southern California regions of the country. The Company does not believe it has any significant concentrations in any one industry, geographic location, or with any one client. Part II. Item 8. “Financial Statements and Supplementary Data - Note 4: Investment Securities,” highlights the types of securities in which the Company invests, and Part II. Item 8. “Financial Statements and Supplementary Data - Note 5: Loan Portfolio and Credit Quality,” describes the concentration of the Private Banking loan data based on the location of the lender.
Cash and Cash Equivalents, Policy [Policy Text Block]	Statement of Cash Flows For purposes of reporting cash flows, the Company considers cash and due from banks and federal funds sold, all of which have original maturities with 90 days or less, to be cash equivalents.
Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block]	Cash and Due from Banks The Bank is required to maintain average reserve balances in an account with the Federal Reserve based upon a percentage of certain deposits. As of December 31, 2015 and 2014 , the daily amounts required to be held in the aggregate for the Bank were $4.6 million and $8.1 million , respectively.
Marketable Securities, Policy [Policy Text Block]	Investment Securities Available-for-sale investment securities are reported at fair value, with unrealized gains and losses credited or charged, net of the estimated tax effect, to accumulated other comprehensive income/ (loss). Held-to-maturity investment securities are those which the Company has the positive intent and ability to hold to maturity and are reported at amortized cost. Premiums and discounts on the investment securities are amortized or accreted into net interest income by the level-yield method. Gains and losses on the sale of the available-for-sale investments are recognized at the trade date on a specific identification basis. Dividend and interest income is recognized when earned and is recorded on the accrual basis. The Company conducts a quarterly review and evaluation of its investment securities to determine if the decline in fair value of a security below its amortized cost is deemed to be other-than-temporary. Other-than-temporary impairment losses are recognized on securities when: (i) the holder has an intention to sell the security; (ii) it is more likely than not that the security will be required to be sold prior to recovery; or (iii) the holder does not expect to recover the entire amortized cost basis of the security. Other-than-temporary losses are reflected in earnings as a charge against gain on sale of investments, net, to the extent the impairment is related to credit losses. The amount of the impairment related to other factors is recognized in accumulated other comprehensive income/ (loss). The Company has no intention to sell any securities in an unrealized loss position at December 31, 2015 nor is it more likely than not that the Company would be required to sell such securities prior to the recovery of the unrealized losses. As of December 31, 2015 , the Company believes that all impairments of investment securities are temporary in nature. No other-than-temporary impairment losses were recognized in the consolidated statements of operations for the years ended December 31, 2015 , 2014 , and 2013 .
Finance, Loan and Lease Receivables, Held-for-sale, Policy [Policy Text Block]	Loans Held for Sale Loans originated and held for sale in the secondary market are carried at the lower of cost or estimated fair value in the aggregate. Fair value is based on commitments on hand from investors or prevailing market prices. Unrealized losses, if any, are recognized through a valuation allowance by charges to income. Loans transferred to the held for sale category from the loan portfolio are transferred at the lower of cost or fair value, usually as determined at the individual loan level. If fair value is less than cost, then a charge for the difference will be made to the allowance for loan losses if the decline in value is due to credit issues. Gains or losses on the sale of loans are recognized at the time of sale on a specific identification basis. Interest income is recognized on an accrual basis when earned.
Finance, Loans and Leases Receivable, Policy [Policy Text Block]	Loans Loans are carried at the principal amount outstanding, net of deferred loan origination fees and costs, charge-offs, and interest payments applied to principal on nonaccrual loans. Loan origination fees, net of related direct incremental loan origination costs, are deferred and recognized into income over the contractual lives of the related loans as an adjustment to the loan yield, using the level-yield method. If a loan is paid off prior to maturity, the unamortized portion of net fees/cost is recognized into interest income. If a loan is sold, the unamortized portion of net fees/cost is recognized at the time of sale as a component of the gain or loss on sale of loans. When the Company analyzes its loan portfolio to determine the adequacy of its allowance for loan losses, it categorizes the loans by portfolio segment and class of financing receivable based on the similarities in risk characteristics for the loans. The Company has determined that its portfolio segments and classes of financing receivables are one and the same. The level at which the Company develops and documents its allowance for loan loss methodology is consistent with the grouping of financing receivables based upon initial measurement attributes, risk characteristics, and the Company’s method for monitoring and assessing credit risks. These portfolio segments and classes of financing receivables are: • Commercial and industrial • Commercial real estate • Construction and land • Residential mortgage • Home equity • Consumer and other The past due status of a loan is determined in accordance with its contractual repayment terms. All portfolio segments are reported past due when one scheduled payment is due and unpaid for 30 days or more. The Bank’s policy is to discontinue the accrual of interest on a loan when the collectability of principal or interest is in doubt. When management determines that it is probable that the Bank will not collect all principal and interest on a loan in accordance with the original loan terms, the loan is designated as impaired. Impaired loans are usually commercial loans, which include construction and land loans, for which it is probable that the Company will not collect all amounts due according to the contractual terms of the loan agreement, and all loans restructured in a troubled debt restructuring. Accrual of interest income is discontinued and all interest previously accrued but not collected is reversed against current period interest income when a loan is initially classified as nonaccrual. Generally, interest received on nonaccrual loans is applied against principal or, on a limited basis, reported as interest income on a cash basis, when according to management’s judgment, the collectability of principal is reasonably assured. The Bank’s general policy for returning a loan to accrual status requires the loan to be brought current, for the client to show a history of making timely payments (generally six consecutive months), and when the financial position of the borrower and other relevant factors indicate there is no longer doubt as to the collectability of the loan. The Bank’s loan commitments are generally short-term in nature with terms that are primarily variable. Given the limited interest rate exposure posed by the commitments, the Bank estimates the fair value of these commitments to be immaterial.
Loans and Leases Receivable, Valuation, Policy [Policy Text Block]	Credit Quality Indicators The Bank uses a risk rating system to monitor the credit quality of its loan portfolio. Loan classifications are assessments made by the Bank of the status of the loans based on the facts and circumstances known to the Bank, including management’s judgment, at the time of assessment. Some or all of these classifications may change in the future if there are unexpected changes in the financial condition of the borrower, including but not limited to, changes resulting from continuing deterioration in general economic conditions on a national basis or in the local markets in which the Bank operates adversely affecting, among other things, real estate values. Such conditions, as well as other factors which adversely affect borrowers’ ability to service or repay loans, typically result in changes in loan default and charge-off rates, and increased provisions for loan losses, which would adversely affect the Company’s financial performance and financial condition. These circumstances are not entirely foreseeable and, as a result, it may not be possible to accurately reflect them in the Company’s analysis of credit risk. A summary of the rating system used by the Bank follows: Pass - All loans graded as pass are considered acceptable credit quality by the Bank and are grouped for purposes of calculating the allowance for loan losses. Generally, only commercial loans, including commercial real estate, commercial and industrial loans, and construction and land loans are given a numerical grade. For residential, home equity and consumer loans, the Bank classifies loans as pass unless there is known information such as delinquency or client requests for modifications which, due to financial difficulty, would then generally result in a risk rating such as special mention or more severe depending on the factors. Special Mention - Loans rated in this category are defined as having potential weaknesses that deserve management’s close attention. If left uncorrected, these potential weaknesses may, at some future date, result in the deterioration of the repayment prospects for the credit or the Bank’s credit position. These loans are currently protected but have the potential to deteriorate to a substandard rating. For commercial loans, the borrower’s financial performance may be inconsistent or below forecast, creating the possibility of liquidity problems and shrinking debt service coverage. In loans having this rating, the primary source of repayment is still good, but there is increasing reliance on collateral or guarantor support. Collectability of the loan is not yet in jeopardy. In particular, loans in this category are considered more variable than other categories, since they will typically migrate through categories more quickly. Substandard - Loans rated in this category are inadequately protected by the current sound worth and paying capacity of the obligor or of the collateral pledged, if any. A substandard credit has a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the Bank will sustain some loss if the deficiencies are not corrected. Substandard loans may be either still accruing or nonaccruing depending upon the severity of the risk and other factors such as the value of the collateral, if any, and past due status. Doubtful - Loans rated in this category indicate that collection or liquidation in full on the basis of currently existing facts, conditions, and values, is highly questionable and improbable. Loans in this category are usually on nonaccrual and classified as impaired.
Loans and Leases Receivable, Troubled Debt Restructuring Policy [Policy Text Block]	Restructured Loans When the Bank, for economic or legal reasons related to a borrower’s financial difficulties, grants a concession to a troubled borrower that it would not otherwise consider, the loan is classified as a restructured loan pursuant to Accounting Standards Codification (“ASC”) 470, Debt . The concession either stems from an agreement between the creditor and the Bank or is imposed by law or a court. The concessions may include: • Deferral of principal and/or interest payments • Lower interest rate as compared to a new loan with comparable risk and terms • Extension of the maturity date • Reduction in the principal balance owed All loans whose terms have been modified in a troubled debt restructuring, including commercial, residential, and consumer, are evaluated for impairment under ASC 310, Receivables . Generally, a nonaccrual loan that is restructured remains on nonaccrual status for a period of at least six months to demonstrate that the borrower can meet the restructured terms. However, performance prior to the restructuring, or significant events that coincide with the restructuring, are considered when assessing whether the borrower can meet the new terms and may result in the loan being returned to accrual status at the time of the restructuring or after a shorter performance period. If the borrower’s ability to meet the revised payment schedule is uncertain, the loan remains classified as a nonaccrual loan. A loan may be removed from a restructured classification after the next fiscal year end, if the restructured terms include a market interest rate and the borrower has demonstrated performance with the restructured terms.
Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block]	Allowance for Loan and Lease Losses The allowance for loan losses (“allowance”) is an estimate of the inherent risk of loss in the loan portfolio as of the consolidated balance sheet dates. Management estimates the level of the allowance based on all relevant information available. Changes to the required level in the allowance result in either a provision for loan loss expense, if an increase is required, or a credit to the provision, if a decrease is required. Loan losses are charged to the allowance when management believes that the collectability of the loan principal is unlikely. Recoveries on loans previously charged-off are credited to the allowance when received in cash. The Company’s allowance is accounted for in accordance with guidance issued by various regulatory agencies, including: the Federal Financial Institutions Examination Council Policy Statement on the Allowance for Loan and Lease Losses (December 2006); Securities and Exchange Commission (“SEC”) Staff Accounting Bulletin No. 102, Selected Loan Loss Methodology and Documentation Issues ; ASC 310; and ASC 450, Contingencies . The allowance consists of three primary components: general reserves on pass graded loans, allocated reserves on non-impaired special mention and substandard loans, and the allocated reserves on impaired loans. The calculation of the allowance involves a high degree of management judgment and estimates designed to reflect the inherent risk of loss in the loan portfolio at the measurement date. General reserves are calculated for each loan pool consisting of pass graded loans segregated by portfolio segment, by applying estimated net loss percentages based upon the Bank’s actual historical net charge-offs and, adjusted as appropriate, on a consistent manner based upon consideration of qualitative factors to arrive at a total loss factor for each portfolio segment. The rationale for qualitative adjustments is to more accurately reflect the current inherent risk of loss in the respective portfolio segments than would be determined through the sole consideration of the Bank’s actual historical net charge-off rates. The numerical factors assigned to each qualitative factor are based upon observable data, if applicable, as well as management’s analysis and judgment. The qualitative factors considered by the Company include: • Volume and severity of past due, nonaccrual, and adversely graded loans, • Volume and terms of loans, • Concentrations of credit, • Management’s experience, as well as loan underwriting and loan review policy and procedures, • Economic and business conditions impacting the Bank’s loan portfolio, as well as consideration of collateral values, and • External factors, including consideration of loss factor trends, competition, and legal and regulatory requirements. The Bank makes an independent determination of the applicable loss rate for these factors based on relevant local market conditions, credit quality, and portfolio mix. Each quarter, management reviews the loss factors to determine if there have been any changes in its loan portfolio, market conditions, or other risk indicators which would result in a change to the current loss factor. Allocated reserves on non-impaired special mention and substandard loans reflect management’s assessment of increased risk of losses associated with these types of adversely graded loans. An allocated reserve is assigned to these pools of loans based upon management’s consideration of the credit attributes of individual loans within each pool of loans, including consideration of loan to value ratios, past due status, strength and willingness of the guarantors, and other relevant attributes, as well as the qualitative factors considered for the general reserve as discussed above. These considerations are determined separately for each type of portfolio segment. The allocated reserves are a multiple of the general reserve for each respective portfolio segments, with a greater multiple for loans with increased risk ( i.e. , special mention loans versus substandard loans). A loan is considered impaired in accordance with ASC 310 when, based upon current information and events, it is probable that a creditor will be unable to collect all amounts due according to the contractual terms of the loan agreement. Impairment is measured based on the fair value of the loan, expected future cash flows discounted at the loan’s effective interest rate, or as a practical expedient, impairment may be determined based upon the observable market price of the loan, or the fair value of the collateral, less estimated costs to sell, if the loan is “collateral dependent.” For collateral dependent loans, appraisals are generally used to determine the fair value. When a collateral dependent loan becomes impaired, an updated appraisal of the collateral is obtained, if appropriate. Appraised values are generally discounted for factors such as the Bank’s intention to liquidate the property quickly in a foreclosure sale or the date when the appraisal was performed if the Bank believes that collateral values have declined since the date the appraisal was done. The Bank may use a broker opinion of value in addition to an appraisal to validate the appraised value. In certain instances, the Bank may consider broker opinions of value as well as other qualitative factors while an appraisal is being prepared. If the loan is deemed to be collateral dependent, generally the difference between the book balance (client balance less any prior charge-offs or client interest payments applied to principal) and the fair value of the collateral is taken as a partial charge-off through the allowance for loan losses in the current period. If the loan is not determined to be collateral dependent, then a specific allocation to the general reserve is established for the difference between the book balance of the loan and the expected future cash flows discounted at the loan’s effective interest rate. Charge-offs for loans not considered to be collateral dependent are made when it is determined a loss has been incurred. Impaired Loans are removed from the general loan pools. There may be instances where the loan is considered impaired although based on the fair value of underlying collateral or the discounted expected future cash flows there is no impairment to be recognized. In addition, all loans which are classified as troubled debt restructurings (“TDRs”) are considered impaired. In addition to the three primary components of the allowance for loan losses discussed above (general reserve, allocated reserves on non-impaired special mention and substandard loans, and the allocated reserves on impaired loans), the Bank may also maintain an insignificant amount of additional allowance for loan losses (the unallocated allowance for loan losses). The unallocated reserve reflects the fact that the Allowance for Loan Losses is an estimate and contains a certain amount of imprecision risk. It represents risks identified by Management that are not already captured in the qualitative factors discussed above. The unallocated allowance for loan losses is not considered significant by the Company and will remain at zero unless additional risk is identified. While this evaluation process utilizes historical and other objective information, the classification of loans and the establishment of the allowance for loan losses rely to a great extent on the judgment and experience of management. While management evaluates currently available information in establishing the allowance for loan losses, future adjustments to the allowance may be necessary if economic conditions differ substantially from the assumptions used in making the evaluations. In addition, various regulatory agencies, as an integral part of their examination process, periodically review a financial institution’s allowance for loan losses as well as loan grades/classifications. Such agencies may require the financial institution to recognize additions to the allowance for loan losses or increases to adversely graded loans based on their judgments about information available to them at the time of their examination.
Reserve for Unfunded Loan Commitments [Policy Text Block]	Reserve for Unfunded Loan Commitments The Company maintains a reserve for unfunded loan commitments for such items as unused portion of lines of credit and unadvanced construction loans. The reserve is maintained at a level that reflects the risk in these various commitments. Management determines the reserve percentages on a quarterly basis based on a percentage of the current historical loss rates for these portfolios. Once a loan commitment is funded, the reserve for unfunded loan commitment is reversed and a corresponding allowance for loan loss reserve is established. This unfunded loan commitment reserve is included in other liabilities in the consolidated balance sheets. Net adjustments to the reserve for unfunded commitments are included in other operating expense in the consolidated statements of operations.
Loans and Leases Receivable, Real Estate Acquired Through Foreclosure, Policy [Policy Text Block]	Other Real Estate Owned (“OREO”) OREO is comprised of property acquired through foreclosure proceedings or acceptance of a deed-in-lieu of foreclosure in partial or total satisfaction of certain loans. Properties are recorded at the lower of the recorded investment in the loan at the time of acquisition or the fair value, as established by a current appraisal, comparable sales, and other estimates of value obtained principally from independent sources, less estimated costs to sell. Any decline in fair value compared to the carrying value of a property at the time of acquisition is charged against the allowance for loan losses. Any subsequent valuation adjustments to reflect declines in current fair value, as well as gains or losses on disposition are reported in gain/(loss) on OREO, net in the consolidated statements of operations. Expenses incurred for holding or maintaining OREO properties such as real estate taxes, utilities, and insurance are charged as incurred to other operating expenses in the consolidated statements of operations. Rental income earned, although generally minimal, is offset against other operating expenses.
Property, Plant and Equipment, Policy [Policy Text Block]	Premises and Equipment Premises and equipment consists of leasehold improvements, furniture, fixtures, equipment, art, buildings, and land. Equipment consists primarily of computer equipment. Premises and equipment are carried at cost, less accumulated depreciation and amortization. Depreciation and amortization are computed primarily by the straight-line method over the estimated useful lives of the assets, or the terms of the leases, if shorter, for leasehold improvements. The estimated useful lives for leasehold improvements and buildings are 5-15 years and 40 years, respectively. The estimated useful life for furniture and fixtures is 2-10 years and is 3-5 years for computer equipment. The costs of improvements that extend the life of an asset are capitalized, while the cost of repairs and maintenance are expensed as incurred. Neither land nor art are depreciated.
Goodwill and Intangible Assets, Policy [Policy Text Block]	Valuation of Goodwill/Intangible Assets and Analysis for Impairment The Company allocates the cost of an acquired entity to the assets acquired and liabilities assumed based on their estimated fair values at the date of acquisition. Other intangible assets identified in acquisitions generally consist of advisory contracts, trade names, and non-compete agreements. The value attributed to advisory contracts is based on the time period over which they are expected to generate economic benefits. The advisory contracts are generally amortized over 8-15 years, depending on the contract. Trade names are not amortized. Non-compete agreements are valued based on the expected receipt of future economic benefits protected by clauses in the non-compete agreements that restrict competitive behavior. Non-compete agreements are amortized over the expected life of the agreement, which is generally seven years. The Company’s non-compete agreements became fully amortized during 2013. Long-lived intangible assets are subject to the impairment provisions of ASC 360-10, Property, Plant, and Equipment (“ASC 360”). Long-lived intangible assets are tested for recoverability by comparing the net carrying value of the asset or asset group to the undiscounted net cash flows to be generated from the use and eventual disposition of that asset (asset group) when events or changes in circumstances indicate that its carrying amount may not be recoverable. If the carrying amount of the asset exceeds its net undiscounted cash flows, then an impairment loss is recognized for the amount by which the carrying amount exceeds its fair value, determined based upon the discounted value of the expected cash flows generated by the asset. The intangible impairment test is performed at the reporting unit level, and each affiliate with goodwill and/or intangible assets is considered a reporting unit for goodwill and intangible impairment testing purposes. The excess of the purchase price for acquisitions over the fair value of the net assets acquired, including other intangible assets, is recorded as goodwill. Goodwill is not amortized but is tested for impairment at the reporting unit level, defined as the affiliate level, at least annually in the fourth quarter or more frequently when events or circumstances occur that indicate that it is more likely than not that an impairment has occurred, based on the guidance in ASC 350, Intangibles-Goodwill and Other (“ASC 350”). Goodwill impairment exists when a reporting unit’s carrying value of goodwill exceeds its implied fair value. In accordance with ASC 350, intangible assets with an indefinite useful economic life are not amortized, but are subject to impairment testing at the reporting unit on an annual basis, or when events or changes in circumstances indicate that the carrying amounts are impaired. An entity may assess qualitative factors to determine whether it is more likely than not (that is, a likelihood of more than 50 percent) that the fair value of a reporting unit is less than its carrying amount, including goodwill (“Step 0”). In evaluating whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount, an entity assesses relevant events and circumstances, such as the following: • Macroeconomic conditions such as a deterioration in general economic conditions, limitations on accessing capital, or other developments in equity and credit markets. • Industry and market considerations such as a deterioration in the environment in which an entity operates, an increased competitive environment, a decline in market-dependent multiples or metrics (consider in both absolute terms and relative to peers), a change in the market for an entity’s products or services, or a regulatory or political development. • Overall financial performance such as negative or declining cash flows or a decline in actual or planned revenue or earnings compared with actual and projected results of relevant prior periods. • Other relevant entity-specific events such as changes in management, key personnel, strategy, or customers; contemplation of bankruptcy; or litigation. • Events affecting a reporting unit such as a change in the composition or carrying amount of its net assets, a more-likely-than-not expectation of selling or disposing all, or a portion, of a reporting unit, the testing for recoverability of a significant asset group within a reporting unit, or recognition of a goodwill impairment loss in the financial statements of a subsidiary that is a component of a reporting unit. If, after assessing the totality of events or circumstances such as those described in the preceding paragraph, an entity determines that it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, then the first and second steps of the goodwill impairment test, as described below, are unnecessary. Goodwill is tested for impairment using a two-step process that begins with an estimation of the fair value of a reporting unit. Significant judgment is applied when goodwill is assessed for impairment. This judgment includes developing cash flow projections, selecting appropriate discount rates, identifying relevant market comparables, incorporating general economic and market conditions, and selecting an appropriate control premium. The selection and weighting of the various fair value techniques may result in a higher or lower fair value. Judgment is applied in determining the weightings that are most representative of fair value. The first step (“Step 1”) of impairment testing requires a comparison of each reporting unit’s fair value to carrying value to identify potential impairment. If the carrying amount of a reporting unit exceeds the reporting unit’s fair value, the second step of the impairment test (“Step 2”) is completed to measure the amount of the reporting unit’s goodwill impairment loss, if any. The fair value of the reporting unit is determined using generally accepted approaches to valuation commonly referred to as the income approach, market approach, and cost approach. Within each category, a variety of methodologies exist to assist in the estimation of fair value. Generally a valuation consultant will be engaged to assist with the valuation. For 2015, BPFH has three reportable segments that have goodwill: Wealth Management and Trust, Investment Management, and Wealth Advisory. Boston Private Wealth is the only reporting unit within the Wealth Management and Trust segment. Anchor and DGHM are the reporting units within Investment Management. DGHM does not have any remaining goodwill on its books. BOS and KLS are the reporting units within the Wealth Advisory segment. Because discrete financial information is available and segment management regularly reviews the operating results of Anchor, KLS, and BOS, they are all considered reporting units. For the reporting units within the Investment Management, Wealth Advisory, and Wealth Management and Trust segments, the Company utilizes both the income and market approaches to determine fair value of the reporting units. The income approach is primarily based on discounted cash flows derived from assumptions of income statement activity. For the market approach, earnings before interest, taxes, depreciation and amortization (“EBITDA”) and revenue multiples of comparable companies are selected and applied to the financial services reporting unit’s applicable metrics. The aggregate fair values of the reporting units are compared to market capitalization as an assessment of the appropriateness of the fair value measurements. A control premium analysis is performed to determine whether the implied control premium was within range of overall control premiums observed in the market place. Step 2 of impairment testing is necessary only if a reporting unit’s carrying amount exceeds its fair value. Step 2 requires an assignment of the reporting unit’s fair value to the reporting unit’s assets and liabilities, using the acquisition method accounting guidance in ASC 805, Business Combinations (“ASC 805”), to determine the implied fair value of the reporting unit’s goodwill. The implied fair value of the reporting unit’s goodwill is then compared with the carrying amount of the reporting unit’s goodwill to determine the goodwill impairment loss to be recognized, if any. If the carrying amount of the reporting unit’s goodwill is greater than the implied fair value of the reporting unit’s goodwill, an impairment loss must be recognized for the excess (i.e., recorded goodwill must be written down to the implied fair value of the reporting unit’s goodwill). After a goodwill impairment loss for a reporting unit is measured and recognized, the adjusted carrying amount of the reporting unit’s goodwill becomes the new accounting basis for that goodwill.
Income Tax, Policy [Policy Text Block]	Income Tax Estimates The Company accounts for income taxes in accordance with ASC 740, Income Taxes (“ASC 740”). The deferred tax assets and/or liabilities are determined by multiplying the differences between the financial reporting and tax reporting basis for assets and liabilities by the enacted tax rates expected to be in effect when such differences are recovered or settled. The effect on deferred taxes for a change in tax rates is recognized in income in the period that includes the enactment date. Valuation allowances on deferred tax assets are estimated based on our assessment of the realizability of such amounts. Significant management judgment is required in determining the provision for income taxes and, in particular, any valuation allowance recorded against our deferred tax assets. In accordance with ASC 740, deferred tax assets are to be reduced by a valuation allowance if, based on the weight of available evidence, it is more likely than not that some portion or all of the deferred tax assets will not be realized. The realization of the tax benefit depends upon the existence of sufficient taxable income within the carry-back and carry-forward periods. Management considered the following items in evaluating the need for a valuation allowance: ▪ Cumulative pre-tax income, as adjusted for permanent book-to-tax differences, during the 2013 through 2015 period. ▪ Deferred tax assets are expected to reverse in periods when there will be taxable income. ▪ The Company projects sufficient future taxable income to be generated by operations during the available carryforward period. ▪ Certain tax planning strategies are available, such as reducing investments in tax-exempt securities. ▪ The Company has not had any operating loss or tax credit carryovers expiring unused in recent years. The Company believes that it is more likely than not that the net deferred tax asset, excluding the net deferred tax asset on capital losses, will be realized based upon the ability to generate future taxable income, as well as the availability of current and historical taxable income. The net deferred tax asset at December 31, 2015 and 2014 is net of a valuation allowance for capital losses. Capital losses are deductible to the extent of offsetting capital gains and the Company does not anticipate that it will generate capital gains in future periods. Therefore, the Company has recorded a valuation allowance on capital losses in excess of capital gains as of December 31, 2015 and 2014 .
Derivatives, Policy [Policy Text Block]	Derivative Instruments and Hedging Activities The Company records derivatives on the consolidated balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative and the resulting designation. Derivatives used to hedge exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivatives used to hedge exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. For derivatives designated as cash flow hedges, the effective portion of changes in the fair value of the derivative is initially reported in other comprehensive income/ (loss) (a component of shareholders’ equity), net of tax, and subsequently reclassified to earnings when the hedged transaction affects earnings, and the ineffective portion, if any, of changes in the fair value of the derivative is recognized directly in earnings. The Company assesses the effectiveness of each hedging relationship by comparing the changes in cash flows of the derivative hedging instrument with the changes in cash flows of the designated hedged transactions. For derivatives designated as fair value hedges, changes in the fair value of the derivative are recognized in earnings together with the changes in the fair value of the related hedged item. Therefore, the net amount, if any, representing hedge ineffectiveness, is reflected in earnings.
Management and Investment Advisory Fees, Policy [Policy Text Block]	Investment Management, Wealth Advisory, and Wealth Management and Trust Fees The Company generates fee income from providing wealth management, investment management and wealth advisory services through the Wealth and Investment businesses and from providing trust services to its clients at the Bank. Investment management fees are generally based upon the value of assets under management and are billed monthly, quarterly, or annually. Asset-based advisory fees are recognized as services are rendered and are based upon a percentage of the fair value of client assets managed. Certain wealth advisory fees are not asset-based and are negotiated individually with clients. Any fees collected in advance are deferred and recognized as income over the period earned. Performance-based advisory fees are generally assessed as a percentage of the investment performance realized on a client’s account, generally over an annual period, and are not recognized until any contingencies in the contract that could require the performance fee to be reduced have been eliminated. Assets under management and advisory (“AUM”) at the Company’s consolidated affiliates totaled $27.6 billion and $29.9 billion at December 31, 2015 and 2014 , respectively. These assets are not included in the consolidated financial statements since they are held in a fiduciary or agency capacity and are not assets of the Company.
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]	Stock-Based Incentive Plans At December 31, 2015 , the Company has three stock-based incentive compensation plans. These plans encourage and enable the officers, employees, and non-employee directors of the Company to acquire an interest in the Company. The Company accounts for share-based awards in accordance with ASC 718, Compensation – Stock Compensation . Costs resulting from the issuance of such share-based payment awards are required to be recognized in the financial statements based on the grant date fair value of the award. Stock-based compensation expense is recognized over the requisite service period, which is generally the vesting period.
Earnings Per Share, Policy [Policy Text Block]	Earnings Per Share (“EPS”) Basic EPS is computed by dividing net income/ (loss) attributable to common shareholders by the weighted average number of common shares outstanding during the year. Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common stock (such as stock warrants, non-participating performance-based restricted stock, certain time-based restricted stock, and stock options, among others) were exercised or converted into additional common shares that would then share in the earnings of the entity. Diluted EPS is computed by dividing net income attributable to common shareholders by the weighted average number of common shares outstanding for the year, plus an incremental number of common-equivalent shares computed using the treasury stock method. Dilutive potential common shares could consist of: stock options, performance-based restricted stock, time-based restricted stock not participating in common stock dividends, warrants or other dilutive securities, and conversion of the convertible trust preferred securities. Additionally, when dilutive, interest expense (net of tax) related to the convertible trust preferred securities is added back to net income attributable to common shareholders. The calculation of diluted EPS excludes the potential dilution of common shares and the inclusion of any related expenses if the effect is antidilutive. Unvested time-based restricted stock issued prior to 2013, which includes the right to receive non-forfeitable dividends, is considered to participate with common stock in undistributed earnings for purposes of computing EPS. Companies such as BPFH that have such participating securities are required to calculate basic EPS using the two-class method and diluted EPS using the more dilutive amount resulting from the application of either the two-class method or the if-converted method. Calculations of basic and diluted EPS under the two-class method (i) exclude from the numerator any dividends paid or owed on participating securities and any undistributed earnings considered to be attributable to participating securities, and (ii) exclude from the denominator the dilutive impact of the participating securities. Calculations of EPS under the if-converted method (i) include in the numerator any dividends paid or owed on participating securities, and (ii) include the dilutive impact of the participating securities using the treasury stock method. In 2013, the Company adjusted its time-based restricted stock grant agreements so that dividends would be accumulated and paid only upon vesting, only as to the amount of shares that vest. As a result of this adjustment, time-based restricted stock granted in or after 2013 no longer contains a right to receive non-forfeitable dividends, and therefore is not considered a participating security for purposes of the EPS calculation. Time-based restricted stock issued prior to 2013 was not modified and is still considered a participating security until it vests or is forfeited or cancelled. For the calculation of the Company’s EPS, see Part II. Item 8. “Financial Statements and Supplementary Data - Note 16: Earnings Per Share.”
New Accounting Pronouncements, Policy [Policy Text Block]	Recent Accounting Pronouncements In January 2014, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) No. 2014-04, Receivables - Troubled Debt Restructuring by Creditors (Subtopic 310-40) - Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure . The amendments to this update are intended to clarify when a creditor should be considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan such that the loan should be derecognized and the real estate recognized. The new guidance is effective for fiscal years, and interim periods within those years, beginning after December 15, 2014 and interim periods within annual periods beginning after December 15, 2015. The Company does not expect this ASU to have a material effect on its consolidated financial statements. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”), amending the ASC and creating a new Topic 606, Revenue from Contracts with Customers . This issuance was part of the joint project between the FASB and the International Accounting Standards Board to clarify the principles of recognizing revenue and to develop a common revenue standard for GAAP and International Financial Reporting Standards. ASU 2014-09 is effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. Early adoption is not permitted. The impact of ASU 2014-09 on the Company’s consolidated financial statements is not yet known. Additionally, ASU 2015-14, Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date (“ASU 2015-14”) was issued in August 2015 which defers adoption to annual reporting periods beginning after December 15, 2017.

Restructuring (Tables)

Restructuring (Tables)	12 Months Ended
	Dec. 31, 2015
Restructuring and Related Activities [Abstract]
Schedule of Restructuring Reserve by Type of Cost [Table Text Block]	The following table presents a summary of the restructuring activity for the years ended December 31, 2015, 2014 and 2013. Severance Charges (1) Contract Termination Fees Professional Expenses Other Associated Costs Total (In thousands) Accrued charges at December 31, 2012 $ 3,517 $ 98 $ 8 $ — $ 3,623 Costs paid (3,481 ) — (8 ) — (3,489 ) Adjustments (3 ) (98 ) — — (101 ) Accrued charges at December 31, 2013 33 — — — 33 Costs incurred 739 — — — 739 Costs paid (33 ) — — — (33 ) Accrued charges at December 31, 2014 739 — — — 739 Costs incurred 3,434 — — 290 3,724 Costs paid (868 ) — — (290 ) (1,158 ) Accrued charges at December 31, 2015 $ 3,305 $ — $ — $ — $ 3,305 ___________________ (1) In addition to salary costs, severance charges may include costs related to acceleration of stock awards, outplacement services, and medical benefits.

Investments (Tables)

Investments (Tables)	12 Months Ended
	Dec. 31, 2015
Investments [Abstract]
Schedule of Available-for-sale Securities Reconciliation [Table Text Block]	The following table presents a summary of investment securities: Amortized Cost Unrealized Fair Value Gains Losses (In thousands) At December 31, 2015: Available-for-sale securities at fair value: U.S. government and agencies $ 21,214 $ 64 $ (27 ) $ 21,251 Government-sponsored entities 345,033 874 (1,345 ) 344,562 Municipal bonds 263,661 5,099 (116 ) 268,644 Mortgage-backed securities (1) 431,446 1,329 (5,734 ) 427,041 Other 22,751 268 (7 ) 23,012 Total $ 1,084,105 $ 7,634 $ (7,229 ) $ 1,084,510 Held-to-maturity securities at amortized cost: Mortgage-backed securities (1) $ 116,352 $ 294 $ (262 ) $ 116,384 Total $ 116,352 $ 294 $ (262 ) $ 116,384 At December 31, 2014: Available-for-sale securities at fair value: U.S. government and agencies $ 16,894 $ 32 $ (44 ) $ 16,882 Government-sponsored entities 273,538 983 (268 ) 274,253 Municipal bonds 232,415 3,268 (435 ) 235,248 Mortgage-backed securities (1) 284,403 2,191 (2,890 ) 283,704 Other 19,608 309 (11 ) 19,906 Total $ 826,858 $ 6,783 $ (3,648 ) $ 829,993 Held-to-maturity securities at amortized cost: Mortgage-backed securities (1) $ 140,727 $ 1,638 $ (26 ) $ 142,339 Total $ 140,727 $ 1,638 $ (26 ) $ 142,339 _________________ (1) All mortgage-backed securities are guaranteed by U.S. government agencies or Government-sponsored entities.
Investments Classified by Contractual Maturity Date [Table Text Block]	The following table presents the maturities of available-for-sale investment securities, based on contractual maturity, and the weighted average yields of such securities as of December 31, 2015 : U.S. government and agencies (1) Government-sponsored entities (1) Amortized cost Fair value Weighted average yield Amortized cost Fair value Weighted average yield (In thousands) Within one year $ — $ — — % $ 19,324 $ 19,336 0.86 % After one, but within five years 21,214 21,251 1.63 % 250,526 251,018 1.51 % After five, but within ten years — — — % 75,183 74,208 1.94 % Greater than ten years — — — % — — — % Total $ 21,214 $ 21,251 1.63 % $ 345,033 $ 344,562 1.57 % Municipal bonds (1) Mortgage-backed securities (2) Amortized cost Fair value Weighted average yield (3) Amortized cost Fair value Weighted average yield (In thousands) Within one year $ 21,153 $ 21,237 2.10 % $ — $ — — % After one, but within five years 92,649 93,316 2.14 % 3,087 3,118 2.44 % After five, but within ten years 41,403 42,074 2.99 % 20,591 21,109 3.14 % Greater than ten years 108,456 112,017 4.28 % 407,768 402,814 2.02 % Total $ 263,661 $ 268,644 3.15 % $ 431,446 $ 427,041 2.08 % Other (4) Amortized cost Fair value Weighted average yield (In thousands) Within one year $ 22,751 $ 23,012 — % After one, but within five years — — — % After five, but within ten years — — — % Greater than ten years — — — % Total $ 22,751 $ 23,012 — % The following table presents the maturities of held-to-maturity investment securities, based on contractual maturity, and the weighted average yields of such securities as of December 31, 2015 : Mortgage-backed securities (2) Amortized cost Fair value Weighted average yield (In thousands) Within one year $ — $ — — % After one, but within five years — — — % After five, but within ten years — — — % Greater than ten years 116,352 116,384 2.26 % Total $ 116,352 $ 116,384 2.26 % ___________________ (1) Certain securities are callable before their final maturity. (2) Mortgage-backed securities are shown based on their final (contractual) maturity, but, due to prepayments, they are expected to have shorter lives. (3) Yield shown on a fully taxable equivalent (“FTE”) basis. (4) Other securities consist of money market mutual funds and equity securities held at certain Wealth Advisory and Investment Management businesses.
Realized Gain (Loss) on Investments [Table Text Block]	The following table presents the proceeds from sales, gross realized gains and gross realized losses for available-for-sale investment securities that were sold during the following years: Year Ended December 31, 2015 2014 2013 (In thousands) Proceeds from sales $ 34,160 $ 6,450 $ 4,062 Realized gains 272 16 49 Realized losses (36 ) (23 ) —
Schedule of Unrealized Loss on Investments [Table Text Block]	The following table presents information regarding securities at December 31, 2015 and 2014 having temporary impairment, due to the fair values having declined below the amortized cost of the individual securities, and the time period that the investments have been temporarily impaired. Less than 12 months 12 months or longer Total Fair value Unrealized losses Fair value Unrealized losses Fair value Unrealized losses # of securities (In thousands, except number of securities) December 31, 2015 Available-for-sale securities U.S. government and agencies $ 4,935 $ (18 ) $ 1,001 $ (9 ) $ 5,936 $ (27 ) 3 Government-sponsored entities 167,691 (1,345 ) — — 167,691 (1,345 ) 24 Municipal bonds 14,483 (43 ) 3,173 (73 ) 17,656 (116 ) 12 Mortgage-backed securities (1) 318,156 (3,486 ) 62,753 (2,248 ) 380,909 (5,734 ) 68 Other 47 (4 ) 11 (3 ) 58 (7 ) 6 Total $ 505,312 $ (4,896 ) $ 66,938 $ (2,333 ) $ 572,250 $ (7,229 ) 113 Held-to-maturity securities Mortgage-backed securities (1) $ 40,606 $ (262 ) $ — $ — $ 40,606 $ (262 ) 5 Total $ 40,606 $ (262 ) $ — $ — $ 40,606 $ (262 ) 5 Less than 12 months 12 months or longer Total Fair value Unrealized losses Fair value Unrealized losses Fair value Unrealized losses # of securities (In thousands, except number of securities) December 31, 2014 Available-for-sale securities U.S. government and agencies $ 10,364 $ (4 ) $ 632 $ (40 ) $ 10,996 $ (44 ) 2 Government-sponsored entities 51,980 (99 ) 28,957 (169 ) 80,937 (268 ) 8 Municipal bonds 62,871 (255 ) 15,473 (180 ) 78,344 (435 ) 41 Mortgage-backed securities (1) 56,711 (192 ) 91,133 (2,698 ) 147,844 (2,890 ) 34 Other 74 (11 ) — — 74 (11 ) 7 Total $ 182,000 $ (561 ) $ 136,195 $ (3,087 ) $ 318,195 $ (3,648 ) 92 Held-to-maturity securities Mortgage-backed securities (1) $ 13,871 $ (26 ) $ — $ — $ 13,871 $ (26 ) 1 Total $ 13,871 $ (26 ) $ — $ — $ 13,871 $ (26 ) 1 ___________________ (1) All mortgage-backed securities are guaranteed by U.S. government agencies or Government-sponsored entities. The U.S. government and agencies securities, government-sponsored entities securities, and mortgage-backed securities in the table above had Standard and Poor’s credit ratings of AA+. The municipal bonds in the table above had Standard and Poor’s credit ratings of AA-. The other securities consisted of equity securities. At December 31, 2015 , the Company does not consider these investments other-than-temporarily impaired because the decline in fair value on investments is primarily attributed to changes in interest rates and not credit quality. At December 31, 2015 and 2014 , the amount of investment securities in an unrealized loss position greater than 12 months, as well as in total, was primarily due to changes in interest rates. The Company has no intent to sell any securities in an unrealized loss position at December 31, 2015 and it is not more likely than not that the Company would be forced to sell any of these securities prior to the full recovery of all unrealized loss amounts. Subsequent to December 31, 2015 and through the date of the filing of this Annual Report on Form 10-K, no securities were downgraded to below investment grade, nor were any securities in an unrealized loss position sold.
Concentration Risk Disclosure [Text Block]	The following table presents the concentration of securities with any one issuer that exceeds ten percent of shareholders’ equity as of December 31, 2015 : Amortized cost Fair value (In thousands) Government National Mortgage Association $ 111,340 $ 109,627 Federal Home Loan Mortgage Corporation 171,582 171,450 Federal Home Loan Bank 103,806 103,251 Federal National Mortgage Association 368,690 366,356 Total $ 755,418 $ 750,684

Loans Receivable and Credit Q38

Loans Receivable and Credit Quality (Tables)	12 Months Ended
	Dec. 31, 2015
Loans Receivable [Abstract]
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]	The following table presents a summary of the loan portfolio based on the portfolio segment as of the dates indicated: December 31, 2015 December 31, 2014 (In thousands) Commercial and industrial $ 1,111,555 $ 953,085 Commercial real estate 1,914,134 1,788,403 Construction and land 183,434 125,349 Residential 2,229,540 2,132,095 Home equity 119,828 114,859 Consumer and other 160,721 156,145 Total Loans $ 5,719,212 $ 5,269,936
Schedule of Financing Receivables, Non Accrual Status [Table Text Block]	The following table presents nonaccrual loans receivable by class of receivable as of the dates indicated: December 31, 2015 December 31, 2014 (In thousands) Commercial and industrial $ 1,019 $ 2,129 Commercial real estate 11,232 18,485 Construction and land 3,297 11,422 Residential 9,661 9,713 Home equity 1,306 1,320 Consumer and other 56 1,113 Total $ 26,571 $ 44,182
Past Due Financing Receivables [Table Text Block]	The following tables present the payment status of loans receivable by class of receivable as of the dates indicated: December 31, 2015 Accruing Past Due Nonaccrual Loans 30-59 Days Past Due 60-89 Days Past Due Total Accruing Past Due Current Payment Status 30-89 Days Past Due 90 Days or Greater Past Due Total Non- accrual Loans Current Accruing Loans Total Loans Receivable (In thousands) Commercial and industrial $ 2,329 $ 338 $ 2,667 $ 726 $ — $ 293 $ 1,019 $ 1,107,869 $ 1,111,555 Commercial real estate 2,091 529 2,620 5,912 — 5,320 11,232 1,900,282 1,914,134 Construction and land — — — 149 34 3,114 3,297 180,137 183,434 Residential 6,267 873 7,140 924 874 7,863 9,661 2,212,739 2,229,540 Home equity 40 — 40 217 — 1,089 1,306 118,482 119,828 Consumer and other 235 392 627 24 9 23 56 160,038 160,721 Total $ 10,962 $ 2,132 $ 13,094 $ 7,952 $ 917 $ 17,702 $ 26,571 $ 5,679,547 $ 5,719,212 December 31, 2014 Accruing Past Due Nonaccrual Loans 30-59 Days Past Due 60-89 Days Past Due Total Accruing Past Due Current Payment Status 30-89 Days Past Due 90 Days or Greater Past Due Total Non- accrual Loans Current Accruing Loans Total Loans Receivable (In thousands) Commercial and industrial $ 723 $ — $ 723 $ 157 $ — $ 1,972 $ 2,129 $ 950,233 $ 953,085 Commercial real estate 167 71 238 14,235 684 3,566 18,485 1,769,680 1,788,403 Construction and land — — — 8,245 86 3,091 11,422 113,927 125,349 Residential 3,878 1,913 5,791 2,770 1,704 5,239 9,713 2,116,591 2,132,095 Home equity — — — 98 — 1,222 1,320 113,539 114,859 Consumer and other 208 — 208 1,041 9 63 1,113 154,824 156,145 Total $ 4,976 $ 1,984 $ 6,960 $ 26,546 $ 2,483 $ 15,153 $ 44,182 $ 5,218,794 $ 5,269,936
Financing Receivable Credit Quality Indicators [Table Text Block]	The following tables present the loan portfolio’s credit risk profile by internally assigned grade and class of receivable as of the dates indicated: December 31, 2015 By Loan Grade or Nonaccrual Status Pass Special Mention Accruing Substandard Nonaccrual Loans Total (In thousands) Commercial and industrial $ 1,070,438 $ 28,643 $ 11,455 $ 1,019 $ 1,111,555 Commercial real estate 1,841,603 27,594 33,705 11,232 1,914,134 Construction and land 162,563 12,974 4,600 3,297 183,434 Residential 2,213,204 — 6,675 9,661 2,229,540 Home equity 118,522 — — 1,306 119,828 Consumer and other 158,686 — 1,979 56 160,721 Total $ 5,565,016 $ 69,211 $ 58,414 $ 26,571 $ 5,719,212 December 31, 2014 By Loan Grade or Nonaccrual Status Pass Special Mention Accruing Substandard Nonaccrual Loans Total (In thousands) Commercial and industrial $ 928,228 $ 15,703 $ 7,025 $ 2,129 $ 953,085 Commercial real estate 1,703,064 47,782 19,072 18,485 1,788,403 Construction and land 100,672 13,255 — 11,422 125,349 Residential 2,112,129 — 10,253 9,713 2,132,095 Home equity 113,017 — 522 1,320 114,859 Consumer and other 153,044 — 1,988 1,113 156,145 Total $ 5,110,154 $ 76,740 $ 38,860 $ 44,182 $ 5,269,936
Impaired Financing Receivables [Table Text Block]	The following tables present, by class of receivable, the balance of impaired loans with and without a related allowance, the associated allowance for those impaired loans with a related allowance, and the total unpaid principal on impaired loans: As of and for the year ended December 31, 2015 Recorded Investment (1) Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized while Impaired (In thousands) With no related allowance recorded: Commercial and industrial $ 2,259 $ 2,569 n/a $ 1,638 $ 836 Commercial real estate 12,116 20,113 n/a 17,885 1,494 Construction and land 1,097 2,132 n/a 3,027 92 Residential 7,788 8,576 n/a 9,384 269 Home equity — — n/a 42 2 Consumer and other — — n/a 545 61 Subtotal $ 23,260 $ 33,390 n/a $ 32,521 $ 2,754 With an allowance recorded: Commercial and industrial $ 15 $ 15 $ 270 $ 657 $ 66 Commercial real estate 7,346 7,775 713 8,749 385 Construction and land 2,200 2,356 172 2,200 — Residential 6,351 6,966 474 6,940 186 Home equity — — — — — Consumer and other — — — — — Subtotal $ 15,912 $ 17,112 $ 1,629 $ 18,546 $ 637 Total: Commercial and industrial $ 2,274 $ 2,584 $ 270 $ 2,295 $ 902 Commercial real estate 19,462 27,888 713 26,634 1,879 Construction and land 3,297 4,488 172 5,227 92 Residential 14,139 15,542 474 16,324 455 Home equity — — — 42 2 Consumer and other — — — 545 61 Total $ 39,172 $ 50,502 $ 1,629 $ 51,067 $ 3,391 ___________________ (1) Recorded investment represents the client loan balance net of historical charge-offs and historical nonaccrual interest paid, which was applied to principal. As of and for the year ended December 31, 2014 Recorded Investment (1) Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized while Impaired (In thousands) With no related allowance recorded: Commercial and industrial $ 2,011 $ 3,095 n/a $ 2,055 $ 28 Commercial real estate 21,500 28,700 n/a 24,921 2,483 Construction and land 9,221 11,133 n/a 1,597 — Residential 9,650 10,788 n/a 9,221 406 Home equity 50 50 n/a 50 3 Consumer and other 1,006 1,007 n/a 546 1 Subtotal $ 43,438 $ 54,773 n/a $ 38,390 $ 2,921 With an allowance recorded: Commercial and industrial $ 891 $ 954 $ 91 $ 1,111 $ 99 Commercial real estate 9,065 9,493 2,592 7,925 379 Construction and land 2,200 2,356 172 2,545 — Residential 6,749 6,749 1,330 7,742 219 Home equity — — — — — Consumer and other — — — — — Subtotal $ 18,905 $ 19,552 $ 4,185 $ 19,323 $ 697 Total: Commercial and industrial $ 2,902 $ 4,049 $ 91 $ 3,166 $ 127 Commercial real estate 30,565 38,193 2,592 32,846 2,862 Construction and land 11,421 13,489 172 4,142 — Residential 16,399 17,537 1,330 16,963 625 Home equity 50 50 — 50 3 Consumer and other 1,006 1,007 — 546 1 Total $ 62,343 $ 74,325 $ 4,185 $ 57,713 $ 3,618 ____________________ (1) Recorded investment represents the client loan balance net of historical charge-offs and historical nonaccrual interest paid, which was applied to principal.
Troubled Debt Restructurings on Financing Receivables [Table Text Block]	The following tables present the balance of TDRs that were restructured or defaulted during the periods indicated: As of and for the year ended December 31, 2015 Restructured Year to Date TDRs that defaulted in 2015 that were restructured in a TDR in 2015. # of Loans Pre-modification recorded investment Post-modification recorded investment # of Loans Post-modification recorded investment (In thousands, except number of loans) Commercial and industrial 1 $ 1,298 $ 1,304 — $ — Commercial real estate 2 4,850 4,838 1 3,701 Construction and land — — — — — Residential 8 513 516 — — Home equity — — — — — Consumer and other — — — — — Total 11 $ 6,661 $ 6,658 1 $ 3,701 As of and for the year ended December 31, 2015 Extension of Term Temporary Rate Reduction Payment Deferral Combination of Concessions (1) Total Concessions # of Loans Post- modifi- cation recorded invest- ment # of Loans Post- # of Loans Post- # of Loans Post- # of Loans Post- (In thousands, except number of loans) Commercial and Industrial — $ — — $ — — $ — 1 $ 1,304 1 $ 1,304 Commercial real estate 1 4,118 — — — — 1 720 2 4,838 Construction and Land — — — — — — — — — — Residential — — 7 491 1 25 — — 8 516 Home Equity — — — — — — — — — — Consumer and other — — — — — — — — — — ____________________ (1) Combination of concessions includes loans that have had more than one modification, including extension of term, temporary reduction of interest rate, and/or payment deferral. As of and for the year ended December 31, 2014 Restructured Year to Date TDRs that defaulted in 2014 that were restructured in a TDR in 2014. # of Loans Pre-modification recorded investment Post-modification recorded investment # of Loans Post-modification recorded investment (In thousands, except number of loans) Commercial and industrial — $ — $ — — $ — Commercial real estate 1 189 189 — — Construction and land 2 8,782 7,882 — — Residential 3 287 296 4 663 Home equity — — — — — Consumer and other 1 1,000 1,000 — — Total 7 $ 10,258 $ 9,367 4 $ 663 As of and for the year ended December 31, 2014 Extension of Term Temporary Rate Reduction Payment Deferral Combination of Concessions (1) Total Concessions # of Loans Post- # of Loans Post- # of Loans Post- # of Loans Post- # of Loans Post- (In thousands, except number of loans) Commercial and Industrial — $ — — $ — — $ — — $ — — $ — Commercial real estate 1 189 — — — — — — 1 189 Construction and Land 2 7,882 — — — — — — 2 7,882 Residential — — 3 296 — — — — 3 296 Home Equity — — — — — — — — — — Consumer and other 1 1,000 — — — — — — 1 1,000 ____________________ (1) Combination of concessions includes loans that have had more than one modification, including extension of term, temporary reduction of interest rate, and/or payment deferral.

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	12 Months Ended
	Dec. 31, 2015
Allowance for Loan Losses [Abstract]
Allowance for Credit Losses on Financing Receivables [Table Text Block]	The following tables present a summary of the changes in the allowance for loan losses for the periods indicated: As of and for the year ended December 31, 2015 2014 2013 (In thousands) Allowance for loan losses, beginning of year: Commercial and industrial $ 14,114 $ 12,837 $ 11,825 Commercial real estate 43,854 44,979 52,497 Construction and land 4,041 4,465 5,016 Residential 10,374 10,732 10,892 Home equity 1,003 1,020 1,085 Consumer and other 382 322 540 Unallocated 2,070 2,016 2,202 Total allowance for loan losses, beginning of year 75,838 76,371 84,057 Provision/ (credit) for loan losses: Commercial and industrial (518 ) (237 ) 11 Commercial real estate (721 ) (1,940 ) (10,024 ) Construction and land 1,123 (1,905 ) (1,683 ) Residential 342 (2,247 ) 1,824 Home equity 82 (32 ) 271 Consumer and other 207 (93 ) (213 ) Unallocated (1) (2,070 ) 54 (186 ) Total provision/(credit) for loan losses (1,555 ) (6,400 ) (10,000 ) Loans charged-off: Commercial and industrial (253 ) (717 ) (218 ) Commercial real estate (1,400 ) (3,160 ) (2,712 ) Construction and land — (1,100 ) (100 ) Residential (313 ) (263 ) (2,008 ) Home equity — — (360 ) Consumer and other (70 ) (56 ) (19 ) Total charge-offs (2,036 ) (5,296 ) (5,417 ) As of and for the year ended December 31, 2015 2014 2013 (In thousands) Recoveries on loans previously charged-off: Commercial and industrial 2,471 2,231 1,219 Commercial real estate 2,482 3,975 5,218 Construction and land 1,158 2,581 1,232 Residential 141 2,152 24 Home equity — 15 24 Consumer and other 1 209 14 Total recoveries 6,253 11,163 7,731 Allowance for loan losses at December 31 (end of year): Commercial and industrial 15,814 14,114 12,837 Commercial real estate 44,215 43,854 44,979 Construction and land 6,322 4,041 4,465 Residential 10,544 10,374 10,732 Home equity 1,085 1,003 1,020 Consumer and other 520 382 322 Unallocated (1) — 2,070 2,016 Total allowance for loan losses at December 31 (end of year) $ 78,500 $ 75,838 $ 76,371 ____________________ (1) As of December 31, 2015 , the unallocated reserve was allocated to the qualitative factors as part of the general reserves (ASC 450). The allocation had no effect on the 2015 provision/ (credit) for loan losses. The following tables present the Company’s allowance for loan losses and loan portfolio at December 31, 2015 and 2014 by portfolio segment, disaggregated by method of analysis. The Company had no loans acquired with deteriorated credit quality at December 31, 2015 or 2014 . Commercial and industrial Commercial real estate Construction and land Residential (In thousands) Allowance for loan losses balance at December 31, 2015 attributable to: Loans collectively evaluated $ 15,544 $ 43,502 $ 6,150 $ 10,070 Loans individually evaluated 270 713 172 474 Total allowance for loan losses $ 15,814 $ 44,215 $ 6,322 $ 10,544 Recorded investment (loan balance) at December 31, 2015: Loans collectively evaluated $ 1,109,281 $ 1,894,672 $ 180,137 $ 2,215,401 Loans individually evaluated 2,274 19,462 3,297 14,139 Total Loans $ 1,111,555 $ 1,914,134 $ 183,434 $ 2,229,540 Home equity Consumer and other Unallocated Total (Continued from above) (In thousands) Allowance for loan losses balance at December 31, 2015 attributable to: Loans collectively evaluated $ 1,085 $ 520 $ — $ 76,871 Loans individually evaluated — — — 1,629 Total allowance for loan losses $ 1,085 $ 520 $ — $ 78,500 Recorded investment (loan balance) at December 31, 2015: Loans collectively evaluated $ 119,828 $ 160,721 $ — $ 5,680,040 Loans individually evaluated — — — 39,172 Total Loans $ 119,828 $ 160,721 $ — $ 5,719,212 Commercial and industrial Commercial real estate Construction and land Residential (In thousands) Allowance for loan losses balance at December 31, 2014 attributable to: Loans collectively evaluated $ 14,023 $ 41,262 $ 3,869 $ 9,044 Loans individually evaluated 91 2,592 172 1,330 Total allowance for loan losses $ 14,114 $ 43,854 $ 4,041 $ 10,374 Recorded investment (loan balance) at December 31, 2014: Loans collectively evaluated $ 950,183 $ 1,757,839 $ 113,928 $ 2,115,696 Loans individually evaluated 2,902 30,564 11,421 16,399 Total Loans $ 953,085 $ 1,788,403 $ 125,349 $ 2,132,095 Home equity Consumer and other Unallocated Total (Continued from above) (In thousands) Allowance for loan losses balance at December 31, 2014 attributable to: Loans collectively evaluated $ 1,003 $ 382 $ 2,070 $ 71,653 Loans individually evaluated — — — 4,185 Total allowance for loan losses $ 1,003 $ 382 $ 2,070 $ 75,838 Recorded investment (loan balance) at December 31, 2014: Loans collectively evaluated $ 114,809 $ 155,138 $ — $ 5,207,593 Loans individually evaluated 50 1,007 — 62,343 Total Loans $ 114,859 $ 156,145 $ — $ 5,269,936

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2015
PREMISES AND EQUIPMENT [Abstract]
Property, Plant and Equipment [Table Text Block]	Premises and equipment consisted of the following: As of December 31, 2015 2014 (In thousands) Leasehold improvements $ 43,433 $ 41,625 Furniture, fixtures, and equipment 49,039 46,809 Buildings 4,715 4,724 Land 374 374 Subtotal 97,561 93,532 Less: accumulated depreciation and amortization 66,525 61,333 Premises and equipment, net $ 31,036 $ 32,199
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	The Company is obligated for minimum payments under non-cancelable operating leases. In accordance with the terms of these leases, the Company is currently committed to minimum annual payments as follows: Minimum lease payments (In thousands) 2016 $ 19,372 2017 16,098 2018 14,998 2019 13,932 2020 13,400 Thereafter 59,090 Total $ 136,890

Goodwill and Other Intangible41

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2015
GOODWILL AND OTHER INTANGIBLE ASSETS [Abstract]
Schedule of Goodwill [Table Text Block]	The following tables details the changes in carrying value of goodwill by segment during the year ended December 31, 2014. Balance at December 31, 2013 Contributions, net Acquisitions Balance at (In thousands) Goodwill Private Banking $ 2,403 $ (2,403 ) $ — $ — Wealth Management and Trust — 2,403 41,902 44,305 Investment Management 66,955 — — 66,955 Wealth Advisory 40,822 — — 40,822 Total goodwill $ 110,180 $ — $ 41,902 $ 152,082
Schedule of Intangible Assets and Goodwill [Table Text Block]	The following tables detail total goodwill and the cumulative impairment charges thereon as of December 31, 2015 and 2014: Goodwill prior to impairment Cumulative goodwill impairment Goodwill (In thousands) Private Banking $ 34,281 $ (34,281 ) $ — Wealth Management and Trust 44,305 — 44,305 Investment Management 117,216 (50,261 ) 66,955 Wealth Advisory 40,822 — 40,822 Total goodwill at December 31, 2015 $ 236,624 $ (84,542 ) $ 152,082 Private Banking $ 34,281 $ (34,281 ) $ — Wealth Management and Trust 44,305 — 44,305 Investment Management 117,216 (50,261 ) 66,955 Wealth Advisory 40,822 — 40,822 Total goodwill at December 31, 2014 $ 236,624 $ (84,542 ) $ 152,082
Schedule of Finite-Lived Intangible Assets [Table Text Block]	The following table shows the gross and net carrying amounts of identifiable intangible assets at December 31, 2015 and 2014 : 2015 2014 Gross Carrying Amount Accumulated Amortization Net Gross Carrying Amount Accumulated Amortization Net (In thousands) Advisory contracts $ 75,013 $ 44,046 $ 30,967 $ 75,013 $ 37,676 $ 37,337 Employment agreements 3,247 3,247 — 3,247 3,247 — Trade names 2,040 — 2,040 2,040 — 2,040 Mortgage servicing rights 1,380 1,380 — 1,380 1,039 341 Total $ 81,680 $ 48,673 $ 33,007 $ 81,680 $ 41,962 $ 39,718
Schedule of Expected Amortization Expense [Table Text Block]	The estimated annual amortization expense for these identifiable intangibles over the next five years is: Estimated intangible amortization expense (In thousands) 2016 $ 6,282 2017 5,678 2018 4,438 2019 3,508 2020 3,248

Derivatives and Hedging Activ42

Derivatives and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]	The following table presents the fair value of the Company’s derivative financial instruments as well as their classification on the consolidated balance sheets as of December 31, 2015 and 2014 . December 31, 2015 December 31, 2014 Asset derivatives Liability derivatives Asset derivatives Liability derivatives Balance sheet location Fair value (1) Balance sheet location Fair value (1) Balance sheet location Fair value (1) Balance sheet location Fair value (1) (In thousands) Derivatives designated as hedging instruments: Interest rate products Other assets $ — Other liabilities $ (1,907 ) Other assets $ 34 Other liabilities $ (3,352 ) Derivatives not designated as hedging instruments: Interest rate products Other assets 7,960 Other liabilities (8,095 ) Other assets 5,323 Other liabilities (5,434 ) Total $ 7,960 $ (10,002 ) $ 5,357 $ (8,786 ) ___________________ (1) For additional details, see Part II. Item 8. “Financial Statements and Supplementary Data - Note 21: Fair Value of Financial Instruments.”
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Table Text Block]	The following table presents the effect of the Company’s derivative financial instruments in the consolidated statement of operations for the years ended December 31, 2015 and 2014 . Derivatives in Cash Flow Hedging Relationships Amount of Gain or (Loss) Recognized in OCI on Derivatives (Effective Portion) Years Ended December 31, Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)Years Ended December 31, 2015 2014 2015 2014 (In thousands) Interest rate products $ (2,642 ) $ (3,425 ) Interest Expense $ (4,052 ) $ (3,198 ) Total $ (2,642 ) $ (3,425 ) $ (4,052 ) $ (3,198 )
Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]	The following table presents the effect of the Company’s derivative financial instruments, not designated as hedging instruments, in the consolidated statements of operations for the years ended December 31, 2015 and 2014 . Derivatives Not Designated as Hedging Instruments Location of Gain or (Loss) Recognized in Income on Derivative Amount of Gain or (Loss), Net, Recognized in Income on Derivative Years Ended December 31, 2015 2014 (In thousands) Interest rate products Other income/(expense) $ (12 ) $ (127 ) Other products (1) Other income/(expense) 44 — Total $ 32 $ (127 ) _________________ (1) Risk Participation Agreement

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2015
Deposits [Abstract]
Schedule of Deposits by Type [Table Text Block]	Deposits are summarized as follows: December 31, 2015 2014 (In thousands) Demand deposits (non-interest bearing) $ 1,689,604 $ 1,418,426 NOW (1) 588,337 549,320 Savings 72,336 71,367 Money market (1) 3,105,172 2,816,928 Certificates of deposit under $100,000 (1) 173,011 185,721 Certificates of deposit $100,000 or greater 411,977 412,117 Total $ 6,040,437 $ 5,453,879 ___________________ (1) Includes brokered deposits.
Banking and Thrift Disclosure [Text Block]	Certificates of deposit had the following schedule of maturities: December 31, 2015 2014 (In thousands) Less than 3 months remaining $ 192,702 $ 171,157 3 to 6 months remaining 136,635 126,109 6 to 12 months remaining 111,674 121,654 1 to 3 years remaining 120,939 120,701 3 to 5 years remaining 22,035 41,706 More than 5 years remaining 1,003 16,511 Total $ 584,988 $ 597,838

Federal Funds Purchased and S44

Federal Funds Purchased and Securities Sold Under Agreements to Repurchase (Tables)	12 Months Ended
	Dec. 31, 2015
Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Abstract]
Schedule of Short-term Debt [Table Text Block]	Federal Funds Purchased Securities Sold Under Agreement to Repurchase (In thousands) 2015 Outstanding at end of year $ — $ 58,215 Maximum outstanding at any month-end 102,000 75,313 Average balance for the year 10,008 64,320 Weighted average rate at end of year — % 0.05 % Weighted average rate paid for the year 0.31 % 0.05 % 2014 Outstanding at end of year $ — $ 30,496 Maximum outstanding at any month-end 75,000 154,448 Average balance for the year 1,671 108,191 Weighted average rate at end of year — % 0.05 % Weighted average rate paid for the year 0.33 % 0.05 % 2013 Outstanding at end of year $ — $ 102,353 Maximum outstanding at any month-end 90,000 125,971 Average balance for the year 4,732 102,643 Weighted average rate at end of year — % 0.05 % Weighted average rate paid for the year 0.30 % 0.36 %

Federal Home Loan Bank Borrow45

Federal Home Loan Bank Borrowings (Tables)	12 Months Ended
	Dec. 31, 2015
FEDERAL HOME LOAN BANK BORROWINGS [Abstract]
Schedule of Federal Home Loan Bank, Advances, by Branch of FHLB Bank [Table Text Block]	A summary of borrowings from the FHLBs is as follows: December 31, 2015 Amount Weighted Average Rate (In thousands) Within 1 year $ 216,601 1.34 % Over 1 to 2 years 100,271 1.90 % Over 2 to 3 years 88,974 1.53 % Over 3 to 4 years 8,561 1.75 % Over 4 to 5 years 34,365 3.40 % Over 5 years 12,552 3.21 % Total $ 461,324 1.71 %

Junior Subordinated Debentures

Junior Subordinated Debentures (Tables)	12 Months Ended
	Dec. 31, 2015
JUNIOR SUBORDINATED DEBENTURES [Abstract]
Schedule of Long-term Debt Instruments [Table Text Block]	The schedule below presents the detail of the Company’s junior subordinated debentures: December 31, 2015 2014 (In thousands) Boston Private Capital Trust II junior subordinated debentures $ 103,093 $ 103,093 Boston Private Capital Trust I junior subordinated debentures 3,270 3,270 Total $ 106,363 $ 106,363

Noncontrolling Interests (Table

Noncontrolling Interests (Tables)	12 Months Ended
	Dec. 31, 2015
NONCONTROLLING INTERESTS [Abstract]
Redeemable Noncontrolling Interest [Table Text Block]	The following table presents, by affiliate, the noncontrolling interests included as redeemable noncontrolling interests and noncontrolling interests in mezzanine and permanent equity, respectively, at the periods indicated: December 31, 2015 December 31, 2014 (In thousands) Anchor $ 11,907 $ 11,929 BOS 6,744 6,069 DGHM (1) 2,830 3,293 Total $ 21,481 $ 21,291 Redeemable noncontrolling interests $ 18,088 $ 20,905 Noncontrolling interests $ 3,393 $ 386 _____________ (1) Only includes redeemable noncontrolling interests.
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table Text Block]	The following tables present an analysis of the Company’s redeemable noncontrolling interests for the periods indicated: Year ended Year ended December 31, 2015 December 31, 2014 Redeemable noncontrolling interests Noncontrolling interests Redeemable noncontrolling interests Noncontrolling interests (In thousands) Noncontrolling interests at beginning of period $ 20,905 $ 386 $ 19,468 $ 171 Net income attributable to noncontrolling interests 3,575 832 4,564 186 Distributions (4,189 ) (422 ) (4,426 ) (177 ) Purchases/ (sales) of ownership interests (1,666 ) 419 (1,879 ) 74 Transfers of ownership interests from mezzanine to permanent equity (1,652 ) 1,652 — — Amortization of equity compensation — 472 — 96 Adjustments to fair value 1,115 54 3,178 36 Noncontrolling interests at end of period $ 18,088 $ 3,393 $ 20,905 $ 386 Year ended December 31, 2013 Redeemable noncontrolling interests Noncontrolling interests (In thousands) Noncontrolling interests at beginning of period $ 19,287 $ — Net income attributable to noncontrolling interests 3,849 99 Distributions (3,363 ) (53 ) Purchases/ (sales) of ownership interests — 125 Adjustments to fair value (305 ) — Noncontrolling interests at end of period $ 19,468 $ 171

Equity (Tables)

Equity (Tables)	12 Months Ended
	Dec. 31, 2015
Equity [Abstract]
Schedule of Stock by Class [Table Text Block]	The following table summarizes the terms of the TARP warrant agreements outstanding at December 31, 2015 : Name of warrants Number of warrants Original warrant share number Current warrant share number (2) Original exercise price of warrants Current exercise price of warrants (2) Date issued Expiration date TARP Warrants (1) 2,887,500 1.00 1.08 $8.000 $7.411 11/21/2008 11/21/2018
Comprehensive Income (Loss) [Table Text Block]	The following table presents the Company’s comprehensive income/ (loss) and related tax effect for the years ended December 31, 2015 , 2014 , and 2013 : Other comprehensive income/(loss): Pre-tax Tax expense/ (benefit) Net (In thousands) 2015 Unrealized gain/ (loss) on securities available-for-sale $ (2,494 ) $ (1,145 ) $ (1,349 ) Less: Adjustment for realized gains/ (losses), net 236 97 139 Net unrealized gain/ (loss) on securities available-for-sale (2,730 ) (1,242 ) (1,488 ) Unrealized gain/ (loss) on cash flow hedge (2,642 ) (1,088 ) (1,554 ) Add: scheduled reclass and other 4,052 1,698 2,354 Net unrealized gain/ (loss) on cash flow hedge 1,410 610 800 Net unrealized gain/ (loss) on other (193 ) (78 ) (115 ) Other comprehensive gain/ (loss) (1,513 ) (710 ) (803 ) Net income attributable to the Company (1) 95,317 30,392 64,925 Total comprehensive income $ 93,804 $ 29,682 $ 64,122 2014 Unrealized gain/ (loss) on securities available-for-sale $ 6,231 $ 2,495 $ 3,736 Less: Adjustment for realized gains/ (losses), net (7 ) (3 ) (4 ) Net unrealized gain/ (loss) on securities available-for-sale 6,238 2,498 3,740 Unrealized gain/ (loss) on cash flow hedges (3,425 ) (1,416 ) (2,009 ) Add: scheduled reclass and other 3,198 1,349 1,849 Net unrealized gain/ (loss) on cash flow hedges (227 ) (67 ) (160 ) Net unrealized gain/ (loss) on other (135 ) (55 ) (80 ) Other comprehensive gain/ (loss) 5,876 2,376 3,500 Net income attributable to the Company (1) 101,180 32,365 68,815 Total comprehensive income $ 107,056 $ 34,741 $ 72,315 2013 Unrealized gain/ (loss) on securities available-for-sale $ (11,797 ) $ (4,656 ) $ (7,141 ) Less: Adjustment for realized gains/ (losses), net 49 21 28 Net unrealized gain/ (loss) on securities available-for-sale (11,846 ) (4,677 ) (7,169 ) Unrealized gain/ (loss) on cash flow hedges 15 13 2 Add: scheduled reclass and other 2,083 879 1,204 Net unrealized gain/ (loss) on cash flow hedges 2,098 892 1,206 Net unrealized gain/ (loss) on other (652 ) (294 ) (358 ) Other comprehensive gain/ (loss) (10,400 ) (4,079 ) (6,321 ) Net income attributable to the Company (1) 103,498 32,963 70,535 Total comprehensive income $ 93,098 $ 28,884 $ 64,214 ___________________ (1) Pre-tax net income attributable to the Company is calculated as income before income taxes, plus net income from discontinued operations, less net income attributable to noncontrolling interests.
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]	The following table presents a summary of the amounts reclassified from accumulated other comprehensive income/ (loss) for the years ended December 31, 2015 , 2014 , and 2013 : Description of component of accumulated other comprehensive income/ (loss) Year ended December 31, Affected line item in Statement of Operations 2015 2014 2013 (In thousands) Adjustment for realized gains/(losses) on securities available for sale, net: Pre-tax $ 236 $ (7 ) $ 49 Gain/ (loss) on sale of investments, net Tax expense/ (benefit) 97 (3 ) 21 Income tax expense Net $ 139 $ (4 ) $ 28 Net income attributable to the Company Net realized gain/ (loss) on cash flow hedges: Hedge related to junior subordinated debentures: Pre-tax $ 1,879 $ 1,926 $ 1,894 Interest expense on junior subordinated debentures Tax expense/ (benefit) 804 824 799 Income tax expense Net $ (1,075 ) $ (1,102 ) $ (1,095 ) Net income attributable to the Company Hedge related to deposits Pre-tax $ 2,173 $ 1,272 $ 189 Interest expense on deposits Tax expense/ (benefit) 894 525 80 Income tax expense Net $ (1,279 ) $ (747 ) $ (109 ) Net income attributable to the Company Total reclassifications for the period, net of tax $ (2,354 ) $ (1,849 ) $ (1,204 )
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	The following table presents the components of the Company’s accumulated other comprehensive income/ (loss) as of December 31: 2015 2014 2013 (In thousands) Unrealized gain/ (loss) on securities available for sale, net of tax $ 495 $ 1,983 $ (1,757 ) Unrealized gain/ (loss) on cash flow hedges, net of tax (1,123 ) (1,923 ) (1,763 ) Unrealized gain/ (loss) on other, net of tax (872 ) (757 ) (677 ) Accumulated other comprehensive income/ (loss) $ (1,500 ) $ (697 ) $ (4,197 )

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2015
Earnings Per Share [Abstract]
Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]	The following table is a reconciliation of the components of basic and diluted EPS computations for the three years ended December 31: For the year ended December 31, 2015 2014 2013 (In thousands, except share and per share data) Basic earnings per share - Numerator: Net income from continuing operations $ 62,921 $ 67,405 $ 66,691 Less: Net income attributable to noncontrolling interests 4,407 4,750 3,948 Net income from continuing operations attributable to the Company 58,514 62,655 62,743 Decrease/ (increase) in noncontrolling interests’ redemption values (1) 464 (525 ) (368 ) Dividends on preferred and participating securities (2) (3,566 ) (3,703 ) (14,689 ) Total adjustments to income attributable to common shareholders (3,102 ) (4,228 ) (15,057 ) Net income from continuing operations attributable to common shareholders, before allocation to participating securities 55,412 58,427 47,686 Less: Amount allocated to participating securities (74 ) (282 ) (1,243 ) Net income from continuing operations attributable to common shareholders, after allocation to participating securities $ 55,338 $ 58,145 $ 46,443 Net income from discontinued operations, before allocation to participating securities $ 6,411 $ 6,160 $ 7,792 Less: Amount allocated to participating securities (18 ) (53 ) (336 ) Net income from discontinued operations, after allocation to participating securities $ 6,393 $ 6,107 $ 7,456 Net income attributable to common shareholders, before allocation to participating securities $ 61,823 $ 64,587 $ 55,478 Less: Amount allocated to participating securities (92 ) (335 ) (1,579 ) Net income attributable to common shareholders, after allocation to participating securities $ 61,731 $ 64,252 $ 53,899 Basic earnings per share - Denominator: Weighted average basic common shares outstanding 80,885,253 78,921,480 77,373,817 Per share data - Basic earnings per share from: Continuing operations $ 0.68 $ 0.73 $ 0.60 Discontinued operations $ 0.08 $ 0.08 $ 0.10 Total attributable to common shareholders $ 0.76 $ 0.81 $ 0.70 For the year ended December 31, 2015 2014 2013 (In thousands, except share and per share data) Diluted earnings per share - Numerator: Net income from continuing operations attributable to common shareholders, after allocation to participating securities $ 55,338 $ 58,145 $ 46,443 Add back: income allocated to dilutive securities — — — Net income from continuing operations attributable to common shareholders, after allocation to participating securities, after assumed dilution 55,338 58,145 46,443 Net income from discontinued operations, after allocation to participating securities 6,393 6,107 7,456 Net income attributable to common shareholders, after allocation to participating securities, after assumed dilution $ 61,731 $ 64,252 $ 53,899 Diluted earnings per share - Denominator: Weighted average basic common shares outstanding 80,885,253 78,921,480 77,373,817 Dilutive effect of: Stock options and non-participating performance-based and certain time-based restricted stock (3) 1,133,511 759,138 656,066 Warrants to purchase common stock (3) 1,206,389 1,198,613 723,641 Dilutive common shares 2,339,900 1,957,751 1,379,707 Weighted average diluted common shares outstanding (3) 83,225,153 80,879,231 78,753,524 Per share data - Diluted earnings per share from: Continuing operations $ 0.66 $ 0.72 $ 0.59 Discontinued operations $ 0.08 $ 0.07 $ 0.09 Total attributable to common shareholders $ 0.74 $ 0.79 $ 0.68 Dividends per share declared and paid on common stock $ 0.36 $ 0.32 $ 0.24 _____________________ (1) See Part II. Item 8. “Financial Statements and Supplementary Data - Note 14: Noncontrolling Interests” for a description of the redemption values related to the redeemable noncontrolling interests. In accordance with ASC 480, Distinguishing Liabilities from Equity (“ASC 480”), an increase in redemption values from period to period reduces income attributable to common shareholders. Decreases in redemption value from period to period increase income attributable to common shareholders, but only to the extent that the cumulative change in redemption value remains a cumulative increase since adoption of this standard in the first quarter of 2009. (2) Consideration paid in excess of carrying value for the repurchase of the Series B preferred stock of $11.7 million is considered a deemed dividend and, for purposes of calculating EPS, reduces net income attributable to common shareholders for the year ended December 31, 2013 . (3) The diluted EPS computations for the years ended December 31, 2015 , 2014 , and 2013 do not assume the conversion, exercise or contingent issuance of the following shares for the following periods because the result would have been antidilutive for the periods indicated. As a result of the anti-dilution, the potential common shares excluded from the diluted EPS computation are as follows: For the year ended December 31, 2015 2014 2013 Shares excluded due to anti-dilution (treasury method): (In thousands) Potential common shares from: Convertible trust preferred securities (a) 1 1 1 Total shares excluded due to anti-dilution 1 1 1 For the year ended December 31, 2015 2014 2013 Shares excluded due to exercise price exceeding the average market price of common shares during the period (total outstanding): (In thousands) Potential common shares from: Options, restricted stock, or other dilutive securities (b) 548 829 1,399 Total shares excluded due to exercise price exceeding the average market price of common shares during the period 548 829 1,399 (a) If the effect of the conversion of the trust preferred securities would have been dilutive, an immaterial amount of interest expense, net of tax, related to the convertible trust preferred securities would have been added back to net income attributable to common shareholders for the diluted EPS computation for the years presented. (b) Options to purchase shares of common stock, non-participating performance- and certain time-based restricted stock, and other dilutive securities that were outstanding at period ends were not included in the computation of diluted EPS or in the above anti-dilution table because their exercise or conversion prices were greater than the average market price of the common shares during the respective periods.

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2015
Income Taxes [Abstract]
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	The components of income tax expense for continuing operations for the years ended December 31, 2015 , 2014 , and 2013 are as follows: Year Ended December 31, 2015 2014 2013 (In thousands) Current expense: Federal $ 25,631 $ 20,557 $ 17,758 State 9,183 7,254 6,622 Total current expense 34,814 27,811 24,380 Deferred expense/(benefit): Federal (3,185 ) 3,895 6,153 State (1,237 ) 659 2,430 Total deferred expense/(benefit) (4,422 ) 4,554 8,583 Income tax expense $ 30,392 $ 32,365 $ 32,963
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	Reconciliations between the Federal statutory income tax rate of 35% to the effective income tax rate for the years ended December 31, 2015 , 2014 , and 2013 are as follows: Year Ended December 31, 2015 2014 2013 Statutory Federal income tax rate 35.0 % 35.0 % 35.0 % Increase/ (decrease) resulting from: Tax exempt interest, net (7.1 )% (5.6 )% (5.0 )% State and local income tax, net of Federal tax benefit 5.5 % 5.2 % 5.9 % Tax credits (1.9 )% (1.7 )% (1.3 )% Noncontrolling interests (1.6 )% (1.7 )% (1.4 )% Out-of-period adjustment 1.3 % — % — % Other, net 1.4 % 1.2 % (0.1 )% Effective income tax rate 32.6 % 32.4 % 33.1 %
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	The components of gross deferred tax assets and gross deferred tax liabilities at December 31, 2015 and 2014 are as follows: December 31, 2015 2014 (In thousands) Gross deferred tax assets: Allowance for loan losses $ 37,401 $ 32,024 Allowance for losses on OREO 912 875 Stock compensation 7,391 7,709 Deferred and accrued compensation 19,370 17,438 State loss carryforward, net of federal 60 103 Capital loss carryforward 458 469 Mark to market on securities available for sale 274 414 Contingent payments 1,978 1,765 Unrealized loss on investments 748 165 Fixed assets — 688 Other 1,589 1,149 Gross deferred tax assets 70,181 62,799 Less: valuation allowance 458 298 Total deferred tax assets 69,723 62,501 Gross deferred tax liabilities: Cancellation of debt income deferral 4,035 5,572 Goodwill and acquired intangible assets 11,894 7,989 Fixed assets 62 — Other 2,033 1,364 Total gross deferred tax liabilities 18,024 14,925 Net deferred tax asset $ 51,699 $ 47,576
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]	A reconciliation of the beginning and ending gross amount of unrecognized tax benefits under the provisions of ASC 740-10 is as follows: 2015 2014 2013 (In thousands) Balance at January 1 $ 1,067 $ 549 $ 4,802 Additions based on tax positions related to the current year 163 245 143 Additions based on tax positions taken in prior years — 366 1,493 Decreases based on tax positions taken in prior years — — (4,332 ) Decreases based on settlements with taxing authorities — — (1,493 ) Decreases based on the expiration of statute of limitations (208 ) (93 ) (64 ) Balance at December 31 $ 1,022 $ 1,067 $ 549

Employee Benefits (Tables)

Employee Benefits (Tables)	12 Months Ended
	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]	Share-based payments recorded in salaries and benefits expense are as follows: Year Ended December 31, 2015 2014 2013 (In thousands) Stock option and ESPP expense $ 518 $ 653 $ 987 Nonvested share expense 5,723 5,339 4,747 Subtotal 6,241 5,992 5,734 Tax benefit 2,367 2,311 2,210 Stock-based compensation expense, net of tax benefit $ 3,874 $ 3,681 $ 3,524
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]	A summary of option activity under the 2009 Plan for the year ended December 31, 2015 is as follows: Shares Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term in Years Aggregate Intrinsic Value (in 000’s) Outstanding at December 31, 2014 1,634,302 $ 17.10 Granted — $ — Exercised 159,219 $ 8.16 Forfeited 2,852 $ 9.05 Expired 249,280 $ 26.98 Outstanding at December 31, 2015 1,222,951 $ 16.27 2.52 years $ 2,520.1 Exercisable at December 31, 2015 1,222,951 $ 16.27 2.52 years $ 2,520.1
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]	A summary of the Company’s nonvested shares as of December 31, 2015 and changes during the year ended December 31, 2015 , including shares under both the 2009 Plan and the Inducement Plan, is as follows: Shares Weighted- Average Grant-Date Fair Value Nonvested at December 31, 2014 2,542,035 $ 10.76 Granted 738,025 $ 12.41 Vested 614,285 $ 8.68 Forfeited 429,392 $ 11.53 Nonvested at December 31, 2015 2,236,383 $ 11.72

Other Operating Expense (Tables

Other Operating Expense (Tables)	12 Months Ended
	Dec. 31, 2015
OTHER OPERATING EXPENSE [Abstract]
Schedule of Other Operating Cost and Expense, by Component [Table Text Block]	Major components of other operating expense are as follows: Year Ended December 31, 2015 2014 2013 (In thousands) Insurance $ 3,518 $ 2,851 $ 3,065 Employee travel and meals 2,874 2,250 2,396 Other banking expenses 1,788 1,091 1,139 Telephone 1,661 1,589 1,338 Forms and supplies 1,241 838 997 Postage, express mail, and courier 1,007 978 1,059 Publications and dues 870 795 727 Training and education 686 554 372 OREO expenses 197 176 363 Legal settlement costs 150 48 500 Prepayment penalties on repurchase of FHLB borrowings and repurchase agreements — 808 1,781 Provision for off balance sheet loan commitments (271 ) 50 290 Other 2,501 2,100 3,038 Total $ 16,222 $ 14,128 $ 17,065

Reportable Segments (Tables)

Reportable Segments (Tables)	12 Months Ended
	Dec. 31, 2015
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Reconciliation of Reportable Segment Items The following tables present a reconciliation of the revenues, profits, assets, and other significant items of reportable segments as of and for the year ended December 31, 2015 , 2014 , and 2013 . Interest expense on junior subordinated debentures is reported at the Holding Company. Year ended December 31, 2015 2014 2013 Private Banking (In thousands) Net interest income $ 189,501 $ 183,424 $ 178,199 Fees and other income (1) 11,352 10,617 22,454 Total revenues 200,853 194,041 200,653 Provision/ (credit) for loan losses (1,555 ) (6,400 ) (10,000 ) Operating expense 116,575 111,901 118,488 Income before income taxes 85,833 88,540 92,165 Income tax expense (3) 27,844 29,032 30,958 Net income from continuing operations 57,989 59,508 61,207 Net income attributable to the Company $ 57,989 $ 59,508 $ 61,207 Assets $ 7,361,202 $ 6,611,191 $ 6,246,148 Amortization of intangibles $ 341 $ 219 $ 277 Depreciation $ 4,599 $ 5,294 $ 5,350 Year ended December 31, 2015 2014 2013 Wealth Management and Trust (In thousands) Fees and other income $ 53,336 $ 34,584 $ 26,547 Total revenues 53,336 34,584 26,547 Operating expense (2) 54,474 29,401 20,733 Income before income taxes (1,138 ) 5,183 5,814 Income tax expense (3) (350 ) 2,201 2,392 Net income from continuing operations (788 ) 2,982 3,422 Net income attributable to the Company $ (788 ) $ 2,982 $ 3,422 Assets $ 80,088 $ 80,467 $ 4,939 AUM $ 7,976,000 $ 9,274,000 $ 4,565,000 Amortization of intangibles $ 2,428 $ 676 $ — Depreciation $ 772 $ 241 $ 105 Year ended December 31, 2015 2014 2013 Investment Management (In thousands) Net interest income $ 22 $ 22 $ 20 Fees and other income 45,687 47,119 43,875 Total revenues 45,709 47,141 43,895 Operating expense 33,690 34,848 33,195 Income before income taxes 12,019 12,293 10,700 Income tax expense (3) 3,956 4,078 3,493 Net income from continuing operations 8,063 8,215 7,207 Noncontrolling interests 2,265 2,519 2,164 Net income attributable to the Company $ 5,798 $ 5,696 $ 5,043 Assets $ 92,642 $ 100,229 $ 100,609 AUM $ 9,952,000 $ 10,772,000 $ 10,401,000 Amortization of intangibles $ 2,956 $ 2,955 $ 3,058 Depreciation $ 286 $ 240 $ 221 Year ended December 31, 2015 2014 2013 Wealth Advisory (In thousands) Net interest income $ 6 $ 10 $ 66 Fees and other income 50,558 48,199 42,350 Total revenues 50,564 48,209 42,416 Operating expense 35,379 33,213 29,588 Income before income taxes 15,185 14,996 12,828 Income tax expense (3) 5,819 5,653 4,807 Net income from continuing operations 9,366 9,343 8,021 Noncontrolling interests 2,138 2,189 1,784 Net income attributable to the Company $ 7,228 $ 7,154 $ 6,237 Assets $ 79,543 $ 80,804 $ 73,972 AUM $ 9,688,000 $ 9,883,000 $ 9,336,000 Amortization of intangibles $ 986 $ 986 $ 992 Depreciation $ 864 $ 488 $ 363 Year ended December 31, 2015 2014 2013 Holding Company and Eliminations (In thousands) Net interest income $ (3,759 ) $ (3,755 ) $ (4,267 ) Fees and other income 236 279 1,115 Total revenues (3,523 ) (3,476 ) (3,152 ) Operating expense 15,063 17,766 18,701 Income/ (loss) before income taxes (18,586 ) (21,242 ) (21,853 ) Income tax expense/(benefit) (3) (6,877 ) (8,599 ) (8,687 ) Net income/(loss) from continuing operations (11,709 ) (12,643 ) (13,166 ) Noncontrolling interests 4 42 — Discontinued operations (4) 6,411 6,160 7,792 Net income/(loss) attributable to the Company $ (5,302 ) $ (6,525 ) $ (5,374 ) Assets $ (70,967 ) $ (74,817 ) $ 11,441 AUM $ (21,000 ) $ (22,000 ) $ (22,000 ) Depreciation $ 69 $ 205 $ 196 Year ended December 31, 2015 2014 2013 Total Company (In thousands) Net interest income $ 185,770 $ 179,701 $ 174,018 Fees and other income 161,169 140,798 136,341 Total revenues 346,939 320,499 310,359 Provision/ (credit) for loan losses (1,555 ) (6,400 ) (10,000 ) Operating expense 255,181 227,129 220,705 Income before income taxes 93,313 99,770 99,654 Income tax expense (3) 30,392 32,365 32,963 Net income from continuing operations 62,921 67,405 66,691 Noncontrolling interests 4,407 4,750 3,948 Discontinued operations 6,411 6,160 7,792 Net income attributable to the Company $ 64,925 $ 68,815 $ 70,535 Assets $ 7,542,508 $ 6,797,874 $ 6,437,109 AUM $ 27,595,000 $ 29,907,000 $ 24,280,000 Amortization of intangibles $ 6,711 $ 4,836 $ 4,327 Depreciation $ 6,590 $ 6,468 $ 6,235 ___________________ (1) Included in Private Banking non-interest income for the year ended December 31, 2013 is the $10.6 million gain on sale of the Bank’s three offices in the Pacific Northwest. (2) Operating expense for 2015 includes $3.7 million in restructuring expenses related to the Wealth Management and Trust segment. Operating expense for 2014 includes $0.7 million restructuring expenses. Operating expense for 2013 includes no restructuring expenses. (3) The Company’s effective tax rate for 2015 , 2014 , and 2013 are not consistent due to earnings from tax-exempt investments, non-deductible compensation, state and local taxes, income tax credits and income attributable to noncontrolling interests having a different impact on the effective tax rate due primarily to the different levels of income before taxes in years 2015 , 2014 , and 2013 . See Part II. Item 8. “Financial Statements and Supplementary Data - Note 17: Income Taxes” for additional details. (4) Net income from discontinued operations for the years ended December 31, 2015 , 2014 and 2013 of $6.4 million , $6.2 million , and $7.8 million , respectively, are included in Holding Company and Eliminations in the calculation of net income attributable to the Company.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2015
Fair Value [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	The following tables present the Company’s assets and liabilities measured at fair value on a recurring basis as of December 31, 2015 and 2014 , aggregated by the level in the fair value hierarchy within which those measurements fall: As of December 31, 2015 Fair value measurements at reporting date using: Quoted prices in active markets for identical assets (Level 1) Significant other observable inputs (Level 2) Significant unobservable inputs (Level 3) (In thousands) Assets: Available-for-sale securities U.S. government and agencies $ 21,251 $ 20,251 $ 1,000 $ — Government-sponsored entities 344,562 — 344,562 — Municipal bonds 268,644 — 268,644 — Mortgage-backed securities 427,041 — 427,041 — Other 23,012 23,012 — — Total available-for-sale securities 1,084,510 43,263 1,041,247 — Derivatives - interest rate customer swaps 7,960 — 7,960 — Other investments 5,602 5,602 — — Liabilities: Derivative - interest rate customer swaps $ 8,084 $ — $ 8,084 $ — Derivatives - interest rate swaps 1,907 — 1,907 — Derivatives - risk participation agreement 11 — 11 — Other liabilities 5,602 5,602 — — As of December 31, 2014 Fair value measurements at reporting date using: Quoted prices in active markets for identical assets (Level 1) Significant other observable inputs (Level 2) Significant unobservable inputs (Level 3) (In thousands) Assets: Available-for-sale securities: U.S. government and agencies $ 16,882 $ 15,377 $ 1,505 $ — Government-sponsored entities 274,253 — 274,253 — Municipal bonds 235,248 — 235,248 — Mortgage-backed securities 283,704 — 283,704 — Other 19,906 19,906 — — Total available-for-sale securities 829,993 35,283 794,710 — Derivatives - interest rate customer swaps 5,323 — 5,323 — Derivatives - interest rate swaps 34 — 34 — Other investments 5,437 5,437 — — Liabilities: Derivatives - interest rate customer swaps $ 5,434 $ — $ 5,434 $ — Derivatives - interest rate swaps 1,584 — 1,584 — Derivatives-junior subordinated debenture interest rate swap 1,768 — 1,768 —
Fair Value Measurements, Nonrecurring [Table Text Block]	The following tables present the Company’s assets and liabilities measured at fair value on a non-recurring basis during the periods ended December 31, 2015 and 2014 , respectively, aggregated by the level in the fair value hierarchy within which those measurements fall. As of December 31, 2015 Fair value measurements at reporting date using: Gain (losses) from fair value changes Quoted prices in active markets for identical assets (Level 1) Significant other observable inputs (Level 2) Significant unobservable inputs (Level 3) Year ended December 31, 2015 (In thousands) Assets: Impaired loans (1) $ 2,322 $ — $ — $ 2,322 $ (514 ) $ 2,322 $ — $ — $ 2,322 $ (514 ) ___________________ (1) Collateral-dependent impaired loans held at December 31, 2015 that had write-downs in fair value or whose specific reserve changed during 2015. As of December 31, 2014 Fair value measurements at reporting date using: Gain (losses) from fair value changes Quoted prices in active markets for identical assets (Level 1) Significant other observable inputs (Level 2) Significant unobservable inputs (Level 3) Year ended December 31, 2014 (In thousands) Assets: Impaired loans (1) $ 10,094 $ — $ — $ 10,094 $ (3,925 ) $ 10,094 $ — $ — $ 10,094 $ (3,925 ) ___________________ (1) Collateral-dependent impaired loans held at December 31, 2014 that had write-downs in fair value or whose specific reserve changed during 2014.
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Table Text Block]	The following table presents additional quantitative information about assets measured at fair value on a non-recurring basis for which the Company has utilized Level 3 inputs to determine fair value. As of December 31, 2015 Fair Value Valuation technique Unobservable Input Range of Inputs Utilized Weighted Average of Inputs Utilized (In thousands) Impaired Loans $ 2,322 Appraisals of Collateral Discount for costs to sell 7% - 24% 12% Appraisal adjustments 20% - 25% 21% As of December 31, 2014 Fair Value Valuation technique Unobservable Input Range of Inputs Utilized Weighted Average of Inputs Utilized (In thousands) Impaired Loans $ 10,094 Appraisals of Collateral Discount for costs to sell 0% - 10% 3% Appraisal adjustments 0% - 25% 2%
Fair Value, by Balance Sheet Grouping [Table Text Block]	The following tables present the carrying values and fair values of the Company’s financial instruments that are not measured at fair value on a recurring basis (other than certain loans, as noted below): As of December 31, 2015 Book Value Fair Value Quoted prices in active markets for identical assets (Level 1) Significant other observable inputs (Level 2) Significant unobservable inputs (Level 3) (In thousands) FINANCIAL ASSETS: Cash and cash equivalents $ 238,694 $ 238,694 $ 238,694 $ — $ — Investment securities held-to-maturity 116,352 116,384 — 116,384 — Loans held for sale 8,072 8,144 — 8,144 — Loans, net 5,640,712 5,658,254 — — 5,658,254 Other financial assets 118,233 118,233 — 118,233 — FINANCIAL LIABILITIES: Deposits 6,040,437 6,041,239 — 6,041,239 — Securities sold under agreements to repurchase 58,215 58,215 — 58,215 — Federal Home Loan Bank borrowings 461,324 465,100 — 465,100 — Junior subordinated debentures 106,363 96,363 — — 96,363 Other financial liabilities 1,978 1,978 — 1,978 — As of December 31, 2014 Book Value Fair Value Quoted prices Significant Significant (In thousands) FINANCIAL ASSETS: Cash and cash equivalents $ 172,609 $ 172,609 $ 172,609 $ — $ — Investment securities held-to-maturity 140,727 142,339 — 142,339 — Loans held for sale 7,099 7,239 — 7,239 — Loans, net 5,194,098 5,130,843 — — 5,130,843 Other financial assets 114,686 114,686 — 114,686 — FINANCIAL LIABILITIES: Deposits 5,453,879 5,457,117 — 5,457,117 — Securities sold under agreements to repurchase 30,496 30,493 — 30,493 — Federal Home Loan Bank borrowings 370,150 376,320 — 376,320 — Junior subordinated debentures 106,363 96,363 — — 96,363 Other financial liabilities 7,357 7,357 — 7,357 —

Financial Instruments With Of55

Financial Instruments With Off-Balance Sheet Risk (Tables)	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block]	Financial instruments with off-balance sheet risk are summarized as follows: December 31, 2015 2014 (In thousands) Commitments to originate loans Variable rate $ 87,622 $ 133,965 Fixed rate 17,096 31,757 Total commitments to originate new loans $ 104,718 $ 165,722 Unadvanced portion of loans and unused lines of credit $ 1,181,114 $ 1,092,838 Standby letters of credit $ 39,245 $ 33,685 Forward commitments to sell loans $ 28,468 $ 18,977

Boston Private Financial Hold56

Boston Private Financial Holdings, Inc. (Parent Company Only) (Tables)	12 Months Ended
	Dec. 31, 2015
BOSTON PRIVATE FINANCIAL HOLDINGS, INC. (PARENT COMPANY ONLY) [Abstract]
Schedule of Condensed Balance Sheet [Table Text Block]	CONDENSED BALANCE SHEETS December 31, 2015 December 31, 2014 (In thousands) Assets: Cash and cash equivalents $ 55,385 $ 44,593 Investment in wholly-owned and majority-owned subsidiaries: Bank 671,204 633,905 Non-banks 138,178 144,454 Investment in partnerships and trusts 6,340 6,340 Deferred income taxes 1,460 — Other assets 14,243 17,061 Total assets $ 886,810 $ 846,353 Liabilities: Junior subordinated debentures $ 106,363 $ 106,363 Other liabilities 15,746 15,174 Total liabilities 122,109 121,537 Redeemable Noncontrolling Interests (1) 21,481 21,291 Total Shareholders’ Equity 743,220 703,525 Total liabilities, redeemable noncontrolling interests and shareholders’ equity $ 886,810 $ 846,353 ___________________ (1) Includes noncontrolling interests and the maximum redemption value of redeemable noncontrolling interests.
Schedule of Condensed Income Statement [Table Text Block]	CONDENSED STATEMENTS OF OPERATIONS Year ended December 31, 2015 2014 2013 (In thousands) Income: Interest income $ 116 $ 115 $ 140 Gain on repurchase of debt — — 620 Dividends from subsidiaries: Bank 22,700 26,500 27,900 Non-banks 28,789 20,356 24,045 Other income 236 279 496 Total income 51,841 47,250 53,201 Operating Expense: Salaries and employee benefits 10,320 11,876 11,888 Professional fees 2,007 2,965 3,064 Interest expense 3,875 3,872 4,408 Other expenses 2,740 2,966 3,749 Total operating expense 18,942 21,679 23,109 Income before income taxes 32,899 25,571 30,092 Income tax benefit (6,877 ) (8,599 ) (8,688 ) Net income from discontinued operations 6,411 6,160 7,792 Income before equity in undistributed earnings of subsidiaries 46,187 40,330 46,572 Equity in undistributed earnings of subsidiaries 18,738 28,485 23,963 Net income attributable to the Company $ 64,925 $ 68,815 $ 70,535
Schedule of Condensed Cash Flow Statement [Table Text Block]	CONDENSED STATEMENTS OF CASH FLOWS Year ended December 31, 2015 2014 2013 (In thousands) Cash flows from operating activities: Net income attributable to the Company $ 64,925 $ 68,815 $ 70,535 Net income from discontinued operations 6,411 6,160 7,792 Net income from continuing operations 58,514 62,655 62,743 Adjustments to reconcile net income from continuing operations to net cash provided by/ (used in) operating activities: Equity in earnings of subsidiaries: Bank (57,201 ) (62,491 ) (64,628 ) Non-banks (13,026 ) (12,850 ) (11,280 ) Dividends from subsidiaries: Bank 22,700 26,500 27,900 Non-banks 28,789 20,356 24,045 Gain on repurchase of debt — — (620 ) Deferred income tax expense/ (benefit) (4,575 ) 4,642 4,873 Depreciation and amortization 5,097 1,743 3,187 Net decrease/ (increase) in other operating activities 2,167 (2,834 ) (6,630 ) Net cash provided by/ (used in) operating activities of continuing operations 42,465 37,721 39,590 Net cash provided by/ (used in) operating activities of discontinued operations 6,411 6,160 7,792 Net cash provided by/ (used in) operating activities 48,876 43,881 47,382 Cash flows from investing activities: Cash paid for acquisitions, including deferred acquisition obligations 1,821 — — Capital investments in subsidiaries: Bank — (29,007 ) — Non-banks (1,723 ) (1,497 ) (356 ) Cash received from divestitures — — 747 Net cash (used in)/ provided by in other investing activities 1 (98 ) (115 ) Net cash provided by/ (used in) investing activities of continuing operations 99 (30,602 ) 276 Net cash provided by/ (used in) investing activities of discontinued operations — — — Net cash provided by/ (used in) investing activities 99 (30,602 ) 276 Cash flows from financing activities: Repurchase of debt — — (35,536 ) Proceeds from issuance of Series D preferred stock, net — — 47,753 Repurchase of Series B preferred stock, including deemed dividend at repurchase — — (69,827 ) Dividends paid to common shareholders (29,608 ) (25,829 ) (19,129 ) Dividends paid to preferred shareholders (3,475 ) (3,475 ) (2,660 ) Tax savings/ (deficiency) from certain stock compensation awards (1,262 ) 1,294 (663 ) Proceeds from stock option exercises 1,206 1,807 2,332 Proceeds from issuance of common stock, net 160 32,387 4,583 Other equity adjustments (5,204 ) (7,424 ) (3,178 ) Net cash provided by/ (used in) financing activities of continuing operations (38,183 ) (1,240 ) (76,325 ) Net cash provided by/ (used in) financing activities of discontinued operations — — — Net cash provided by/ (used in) financing activities (38,183 ) (1,240 ) (76,325 ) Net (decrease)/ increase in cash and cash equivalents 10,792 12,039 (28,667 ) Cash and cash equivalents at beginning of year 44,593 32,554 61,221 Cash and cash equivalents at end of year $ 55,385 $ 44,593 $ 32,554

Regulatory Matters (Tables)

Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2015
REGULATORY MATTERS [Abstract]
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]	Actual For capital adequacy purposes (at least) To be well capitalized under prompt corrective action provisions (at least) Amount Ratio Amount Ratio Amount Ratio (In thousands) As of December 31, 2015 Common equity tier 1 risk-based capital Company $ 534,241 9.80 % $ 245,216 4.5 % n/a n/a Boston Private Bank 621,668 11.49 243,407 4.5 $ 351,588 6.5 % Tier 1 risk-based capital Company 686,160 12.59 326,954 6.0 n/a n/a Boston Private Bank 621,668 11.49 324,543 6.0 432,723 8.0 Total risk-based capital Company 754,758 13.85 435,939 8.0 n/a n/a Boston Private Bank 689,437 12.75 432,723 8.0 540,904 10.0 Tier 1 leverage capital Company 686,160 9.50 289,059 4.0 n/a n/a Boston Private Bank 621,668 8.68 286,461 4.0 358,077 5.0 As of December 31, 2014 Tier 1 risk-based capital Company $ 637,968 12.57 % $ 202,959 4.0 % n/a n/a Boston Private Bank 566,444 11.25 201,480 4.0 $ 302,220 6.0 % Total risk-based capital Company 701,705 13.83 405,918 8.0 n/a n/a Boston Private Bank 629,591 12.50 402,960 8.0 503,700 10.0 Tier 1 leverage capital Company 637,968 9.53 267,651 4.0 n/a n/a Boston Private Bank 566,444 8.55 265,077 4.0 331,346 5.0 ___________________ n/a = not applicable

Selected Quarterly Data (Unau58

Selected Quarterly Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2015
SELECTED QUARTERLY DATA (UNAUDITED) [Abstract]
Schedule of Quarterly Financial Information [Table Text Block]	The following tables present selected quarterly financial data for 2015 and 2014 : 2015 (1) Fourth Quarter Third Quarter Second Quarter First Quarter (In thousands, except per share data) Revenues Net interest income $ 48,140 $ 46,473 $ 45,085 $ 46,072 Fees and other income 37,718 39,446 42,660 41,345 Total revenues 85,858 85,919 87,745 87,417 Provision/ (credit) for loan losses (1,655 ) 2,600 — (2,500 ) Operating expense 67,407 61,929 62,418 63,427 Income before income taxes 20,106 21,390 25,327 26,490 Income tax expense 5,638 8,182 8,000 8,572 Net income from discontinued operations 1,455 1,316 1,546 2,094 Less: Net income attributable to noncontrolling interests 921 994 1,263 1,229 Net income attributable to the Company $ 15,002 $ 13,530 $ 17,610 $ 18,783 Net earnings per share attributable to the Company’s common shareholders: Basic earnings per share (2) $ 0.17 $ 0.17 $ 0.20 $ 0.22 Diluted earnings per share (2) $ 0.17 $ 0.16 $ 0.20 $ 0.21 2014 (1) Fourth Quarter Third Quarter Second Quarter First Quarter (In thousands, except per share data) Revenues Net interest income $ 44,128 $ 44,783 $ 46,268 $ 44,522 Fees and other income 39,922 33,769 34,374 32,733 Total revenues 84,050 78,552 80,642 77,255 Provision/ (credit) for loan losses 2,400 (2,600 ) (5,000 ) (1,200 ) Operating expense 63,760 53,999 54,402 54,968 Income before income taxes 17,890 27,153 31,240 23,487 Income tax expense 5,901 8,993 10,333 7,138 Net income from discontinued operations 1,510 1,272 1,450 1,928 Less: Net income attributable to noncontrolling interests 1,322 1,167 1,025 1,236 Net income attributable to the Company $ 12,177 $ 18,265 $ 21,332 $ 17,041 Net earnings per share attributable to the Company’s common shareholders: Basic earnings per share (2) $ 0.14 $ 0.22 $ 0.26 $ 0.20 Diluted earnings per share (2) $ 0.13 $ 0.22 $ 0.25 $ 0.20 ___________________ (1) Due to rounding, the sum of the four quarters may not add to the year to date total. (2) Includes the effect of adjustments to net income attributable to the Company to arrive at net income attributable to common shareholders.

Basis of Presentation and Sum59

Basis of Presentation and Summary of Significant Accounting Policies Significant Accounting Policies Text (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Significant Accounting Policies [Abstract]
Cash Reserve Deposit Required and Made	$ 4,600,000	$ 8,100,000
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net	$ 0	$ 0	$ 0

Basis of Presentation and Sum60

Basis of Presentation and Summary of Significant Accounting Policies Assets Under Management (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Assets Under Management and Advisory [Abstract]
Assets under Management, Carrying Amount	$ 27,595	$ 29,907	$ 24,280

Restructuring (Details)

Restructuring (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve		$ 3,305	$ 739	$ 33	$ 3,623
Restructuring and Related Cost, Incurred Cost		3,724	739
Restructuring Reserve, Settled with Cash		(1,158)	(33)	(3,489)
Restructuring Reserve, Accrual Adjustment				(101)
Restructuring and Related Cost, Cost Incurred to Date		18,400
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	[1]	3,305	739	33	3,517
Restructuring and Related Cost, Incurred Cost	[1]	3,434	739
Restructuring Reserve, Settled with Cash	[1]	(868)	(33)	(3,481)
Restructuring Reserve, Accrual Adjustment	[1]			(3)
Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve		0	0	0	98
Restructuring and Related Cost, Incurred Cost		0	0
Restructuring Reserve, Settled with Cash		0	0	0
Restructuring Reserve, Accrual Adjustment				(98)
Restructuring Related Professional Fees [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve		0	0	0	8
Restructuring and Related Cost, Incurred Cost		0	0
Restructuring Reserve, Settled with Cash		0	0	(8)
Restructuring Reserve, Accrual Adjustment				0
Other Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve		0	0	0	0
Restructuring and Related Cost, Incurred Cost		290	0
Restructuring Reserve, Settled with Cash		(290)	0	0
Restructuring Reserve, Accrual Adjustment				$ 0
Private Banking Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date		9,500
Wealth Management and Trust Segment [Member] [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date		4,400
Holding Company and Eliminations Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date		4,500
Senior Executive Restructuring Plan 2012 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		0
Senior Executive Restructuring Plan 2012 [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost					$ 4,800
Banyan Acquisition and WMT Management Restructuring Plan [Member] | Wealth Management and Trust Segment [Member] [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		$ 3,700	$ 700
[1]	In addition to salary costs, severance charges may include costs related to acceleration of stock awards, outplacement services, and medical benefits.

Acquisitions, Asset Sales, an62

Acquisitions, Asset Sales, and Divestitures Acquisitions (Details) - USD ($) $ in Thousands, shares in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Goodwill, Acquired During Period	$ 0	$ 41,902
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	0
2014 Acquisition of Banyan Partners LLC [Member]
Business Acquisition [Line Items]
Business Acquisition, Name of Acquired Entity		Banyan Partners, LLC
Business Acquisition, Effective Date of Acquisition		Oct. 2, 2014
Business Acquisition, Description of Acquired Entity		Banyan, a registered investment advisory firm headquartered in Palm Beach Gardens, Florida. At the time of acquisition, Banyan had approximately $4.3 billion in client assets and locations in New England; South Florida; Texas; California; Atlanta, Georgia; and Madison, Wisconsin.
Business Acquisition, Percentage of Voting Interests Acquired		100.00%
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares		1.7
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable		$ 21,000
Business Combination, Consideration Transferred		43,900
Business Combination, Contingent Consideration, Asset		5,000
Business Combination, Contingent Consideration, Liability		2,000
Payments to Acquire Businesses, Gross		66,900
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	2,000
Goodwill, Acquired During Period		41,900
Business Acquisition, Goodwill, Expected Tax Deductible Amount	$ 39,900
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		$ 23,900
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		10 years
Business Combination, Reason for Business Combination		The rationale for the transaction was that by merging Banyan with the existing Boston Private Bank wealth management business, additional technical expertise and financial acumen would be generated. Banyan has been merged with the existing wealth management business from Boston Private Bank, and the combined company has been renamed Boston Private Wealth. As a wholly-owned subsidiary of the Bank, Boston Private Wealth will also operate as part of the Wealth Management and Trust segment along with the trust operations of the Bank. These operations are reported separately from the Private Banking operations of the Bank.

Acquisitions, Asset Sales, an63

Acquisitions, Asset Sales, and Divestitures Asset Sales and Divestitures (Details) - Westfield Capital Management Company LLC [Member]	12 Months Ended
	Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued Operation, Nature of Activities Having Continuing Cash Flows after Disposal	12.5% share in Westfield’s revenues (up to an annual maximum of $11.6 million)
Discontinued Operation, Period of Continuing Cash Flows after Disposal	2 years

Investments Schedule of Availab

Investments Schedule of Available for sale Securities (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015		Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis		$ 1,084,105		$ 826,858
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax		7,634		6,783
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax		7,229		3,648
Available-for-sale Securities		1,084,510		829,993
Held-to-maturity Securities		116,352		140,727
Held-to-maturity Securities, Unrecognized Holding Gain		294		1,638
Held-to-maturity Securities, Unrecognized Holding Loss		(262)		(26)
Held-to-maturity Securities, Fair Value		116,384		142,339
US Government and Government Agencies and Authorities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis		21,214	[1]	16,894
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax		64		32
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax		27		44
Available-for-sale Securities		21,251	[1]	16,882
US Government-sponsored Enterprises Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis		345,033	[1]	273,538
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax		874		983
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax		1,345		268
Available-for-sale Securities		344,562	[1]	274,253
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis		263,661	[1]	232,415
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax		5,099		3,268
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax		116		435
Available-for-sale Securities		268,644	[1]	235,248
Mortgage Backed Securities, Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	[2]	431,446	[3]	284,403
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	[2]	1,329		2,191
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	[2]	5,734		2,890
Available-for-sale Securities	[2]	427,041	[3]	283,704
Held-to-maturity Securities	[2]	116,352	[3]	140,727
Held-to-maturity Securities, Unrecognized Holding Gain	[2]	294		1,638
Held-to-maturity Securities, Unrecognized Holding Loss	[2]	(262)		(26)
Held-to-maturity Securities, Fair Value	[2]	116,384	[3]	142,339
Other Aggregated Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis		22,751	[4]	19,608
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax		268		309
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax		7		11
Available-for-sale Securities		$ 23,012	[4]	$ 19,906
[1]	Certain securities are callable before their final maturity.
[2]	All mortgage-backed securities are guaranteed by U.S. government agencies or Government-sponsored entities.
[3]	Mortgage-backed securities are shown based on their final (contractual) maturity, but, due to prepayments, they are expected to have shorter lives.
[4]	Other securities consist of money market mutual funds and equity securities held at certain Wealth Advisory and Investment Management businesses.

Investments Maturities of Avail

Investments Maturities of Available for sale Securities by Type (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015		Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis		$ 1,084,105		$ 826,858
Available-for-sale Securities		$ 1,084,510		$ 829,993
Weighted Average Remaining Maturity, Available for Sale Securities		9 years 10 months 25 days		9 years 2 months 12 days
Available for Sale Securities Callable Before Maturity		$ 199,500		$ 185,200
US Government and Government Agencies and Authorities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis	[1]	0
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	[1]	$ 0
Available for sale Securities, Maturities, Next Twelve Months, Weighted Average Yield	[1]	0.00%
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	[1]	$ 21,214
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	[1]	$ 21,251
Available for sale Securities, Maturities, Year Two Through Five, Weighted Average Yield	[1]	1.63%
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	[1]	$ 0
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	[1]	$ 0
Available for sale Securities, Maturities, Year Six Through Ten, Weighted Average Yield	[1]	0.00%
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	[1]	$ 0
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	[1]	$ 0
Available for sale Securities, Maturities, After Ten Years, Weighted Average Yield	[1]	0.00%
Available-for-sale Securities, Amortized Cost Basis		$ 21,214	[1]	16,894
Available-for-sale Securities		$ 21,251	[1]	16,882
Available for sale Securities, Weighted Average Yield	[1]	1.63%
US Government-sponsored Enterprises Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis	[1]	$ 19,324
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	[1]	$ 19,336
Available for sale Securities, Maturities, Next Twelve Months, Weighted Average Yield	[1]	0.86%
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	[1]	$ 250,526
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	[1]	$ 251,018
Available for sale Securities, Maturities, Year Two Through Five, Weighted Average Yield	[1]	1.51%
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	[1]	$ 75,183
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	[1]	$ 74,208
Available for sale Securities, Maturities, Year Six Through Ten, Weighted Average Yield	[1]	1.94%
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	[1]	$ 0
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	[1]	$ 0
Available for sale Securities, Maturities, After Ten Years, Weighted Average Yield	[1]	0.00%
Available-for-sale Securities, Amortized Cost Basis		$ 345,033	[1]	273,538
Available-for-sale Securities		$ 344,562	[1]	274,253
Available for sale Securities, Weighted Average Yield	[1]	1.57%
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis	[1]	$ 21,153
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	[1]	$ 21,237
Available for sale Securities, Maturities, Next Twelve Months, Weighted Average Yield	[1],[2]	2.10%
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	[1]	$ 92,649
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	[1]	$ 93,316
Available for sale Securities, Maturities, Year Two Through Five, Weighted Average Yield	[1],[2]	2.14%
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	[1]	$ 41,403
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	[1]	$ 42,074
Available for sale Securities, Maturities, Year Six Through Ten, Weighted Average Yield	[1],[2]	2.99%
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	[1]	$ 108,456
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	[1]	$ 112,017
Available for sale Securities, Maturities, After Ten Years, Weighted Average Yield	[1],[2]	4.28%
Available-for-sale Securities, Amortized Cost Basis		$ 263,661	[1]	232,415
Available-for-sale Securities		$ 268,644	[1]	235,248
Available for sale Securities, Weighted Average Yield	[1],[2]	3.15%
Mortgage Backed Securities, Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis	[3]	$ 0
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	[3]	$ 0
Available for sale Securities, Maturities, Next Twelve Months, Weighted Average Yield	[3]	0.00%
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	[3]	$ 3,087
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	[3]	$ 3,118
Available for sale Securities, Maturities, Year Two Through Five, Weighted Average Yield	[3]	2.44%
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	[3]	$ 20,591
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	[3]	$ 21,109
Available for sale Securities, Maturities, Year Six Through Ten, Weighted Average Yield	[3]	3.14%
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	[3]	$ 407,768
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	[3]	$ 402,814
Available for sale Securities, Maturities, After Ten Years, Weighted Average Yield	[3]	2.02%
Available-for-sale Securities, Amortized Cost Basis	[4]	$ 431,446	[3]	284,403
Available-for-sale Securities	[4]	$ 427,041	[3]	283,704
Available for sale Securities, Weighted Average Yield	[3]	2.08%
Other Aggregated Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis	[5]	$ 22,751
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	[5]	$ 23,012
Available for sale Securities, Maturities, Next Twelve Months, Weighted Average Yield	[5]	0.00%
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	[5]	$ 0
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	[5]	$ 0
Available for sale Securities, Maturities, Year Two Through Five, Weighted Average Yield	[5]	0.00%
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	[5]	$ 0
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	[5]	$ 0
Available for sale Securities, Maturities, Year Six Through Ten, Weighted Average Yield	[5]	0.00%
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	[5]	$ 0
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	[5]	$ 0
Available for sale Securities, Maturities, After Ten Years, Weighted Average Yield	[5]	0.00%
Available-for-sale Securities, Amortized Cost Basis		$ 22,751	[5]	19,608
Available-for-sale Securities		$ 23,012	[5]	$ 19,906
Available for sale Securities, Weighted Average Yield	[5]	0.00%
[1]	Certain securities are callable before their final maturity.
[2]	Yield shown on a fully taxable equivalent (“FTE”) basis.
[3]	Mortgage-backed securities are shown based on their final (contractual) maturity, but, due to prepayments, they are expected to have shorter lives.
[4]	All mortgage-backed securities are guaranteed by U.S. government agencies or Government-sponsored entities.
[5]	Other securities consist of money market mutual funds and equity securities held at certain Wealth Advisory and Investment Management businesses.

Investments Maturities of Held

Investments Maturities of Held to Maturity Securities by Type (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015		Dec. 31, 2014	Dec. 31, 2013
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities		$ 116,352		$ 140,727
Held-to-maturity Securities, Fair Value		116,384		$ 142,339
Weighted Average Remaining Maturity, Held To Maturity Securities				13 years 9 months 24 days	14 years 9 months 18 days
Mortgage Backed Securities, Other [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities, Debt Maturities, within One Year, Net Carrying Amount	[1]	0
Held-to-maturity Securities, Debt Maturities, Next Twelve Months, Fair Value	[1]	$ 0
Held to maturity securities, Maturities, Next Twelve Months, Weighted Average Yield	[1]	0.00%
Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount	[1]	$ 0
Held-to-maturity Securities, Debt Maturities, Year Two Through Five, Fair Value	[1]	$ 0
Held to maturity securities, Maturities, Year Two Through Five, Weighted Average Yield	[1]	0.00%
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount	[1]	$ 0
Held-to-maturity Securities, Debt Maturities, Year Six Through Ten, Fair Value	[1]	$ 0
Held to maturity securities, Maturities, Year Six Through Ten, Weighted Average Yield	[1]	0.00%
Held-to-maturity Securities, Debt Maturities, after Ten Years, Net Carrying Amount	[1]	$ 116,352
Held-to-maturity Securities, Debt Maturities, after Ten Years, Fair Value	[1]	$ 116,384
Held to maturity Securities, Maturities, After Ten Years, Weighted Average Yield	[1]	2.26%
Held-to-maturity Securities	[2]	$ 116,352	[1]	$ 140,727
Held-to-maturity Securities, Fair Value	[2]	$ 116,384	[1]	$ 142,339
Held to maturity securities, Weighted average yield	[1]	2.26%
[1]	Mortgage-backed securities are shown based on their final (contractual) maturity, but, due to prepayments, they are expected to have shorter lives.
[2]	All mortgage-backed securities are guaranteed by U.S. government agencies or Government-sponsored entities.

Investments Realized Gain (Loss

Investments Realized Gain (Loss) on Securities Sold (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Proceeds from Sale of Available-for-sale Securities	$ 34,160	$ 6,450	$ 4,062
Available-for-sale Securities, Gross Realized Gains	272	16	49
Available-for-sale Securities, Gross Realized Losses	$ (36)	$ (23)	$ 0

Investments Available for Sale

Investments Available for Sale Securities in Unrealized Loss Position (Details) $ in Thousands		12 Months Ended
		Dec. 31, 2015USD ($)securities	Dec. 31, 2014USD ($)securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 505,312	$ 182,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		(4,896)	(561)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		66,938	136,195
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		(2,333)	(3,087)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		572,250	318,195
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses		$ (7,229)	$ (3,648)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | securities		113	92
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 40,606	$ 13,871
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss		(262)	(26)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss		0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value		40,606	13,871
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss		$ (262)	$ (26)
Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | securities		5	1
US Government and Government Agencies and Authorities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 4,935	$ 10,364
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		(18)	(4)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		1,001	632
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		(9)	(40)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		5,936	10,996
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses		$ (27)	$ (44)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | securities		3	2
US Government-sponsored Enterprises Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 167,691	$ 51,980
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		(1,345)	(99)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		0	28,957
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		0	(169)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		167,691	80,937
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses		$ (1,345)	$ (268)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | securities		24	8
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 14,483	$ 62,871
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		(43)	(255)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		3,173	15,473
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		(73)	(180)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		17,656	78,344
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses		$ (116)	$ (435)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | securities		12	41
Mortgage Backed Securities, Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	[1]	$ 318,156	$ 56,711
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	[1]	(3,486)	(192)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	[1]	62,753	91,133
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	[1]	(2,248)	(2,698)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		380,909	147,844
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses		$ (5,734)	$ (2,890)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | securities	[1]	68	34
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	[1]	$ 40,606	$ 13,871
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	[1]	(262)	(26)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	[1]	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	[1]	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	[1]	40,606	13,871
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss	[1]	$ (262)	$ (26)
Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | securities	[1]	5	1
Other Aggregated Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		$ 47	$ 74
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		(4)	(11)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		11	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		(3)	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		58	74
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses		$ (7)	$ (11)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | securities		6	7
[1]	All mortgage-backed securities are guaranteed by U.S. government agencies or Government-sponsored entities.

Investments Other investment di

Investments Other investment disclosures (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Investments, All Other Investments [Abstract]
Cost Method Investments, Additional Information	0	0
Cost Method Investments	$ 27.7	$ 27

Investments Investments in Any

Investments Investments in Any One Issuer Exceeding Ten Percent of Equity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Concentration Risk [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$ 1,084,105	$ 826,858
Available-for-sale Securities	1,084,510	$ 829,993
Credit Concentration Risk [Member]
Concentration Risk [Line Items]
Available-for-sale Securities, Amortized Cost Basis	755,418
Available-for-sale Securities	$ 750,684
Stockholders' Equity, Total [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	10.00%
Government National Mortgage Association Certificates and Obligations (GNMA) [Member] | Credit Concentration Risk [Member]
Concentration Risk [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$ 111,340
Available-for-sale Securities	109,627
Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member] | Credit Concentration Risk [Member]
Concentration Risk [Line Items]
Available-for-sale Securities, Amortized Cost Basis	171,582
Available-for-sale Securities	171,450
Federal Home Loan Bank Certificates and Obligations (FHLB) [Member] | Credit Concentration Risk [Member]
Concentration Risk [Line Items]
Available-for-sale Securities, Amortized Cost Basis	103,806
Available-for-sale Securities	103,251
Federal National Mortgage Association Certificates and Obligations (FNMA) [Member] | Credit Concentration Risk [Member]
Concentration Risk [Line Items]
Available-for-sale Securities, Amortized Cost Basis	368,690
Available-for-sale Securities	$ 366,356

Loans Receivable and Credit Q71

Loans Receivable and Credit Quality Loans by Portfolio Segment (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 5,719,212	$ 5,269,936
Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,111,555	953,085
Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,914,134	1,788,403
Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	183,434	125,349
Residential Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	2,229,540	2,132,095
Home Equity Line of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	119,828	114,859
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 160,721	$ 156,145

Loans Receivable and Credit Q72

Loans Receivable and Credit Quality Nonaccrual Loans by Class of Financing Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	$ 26,571	$ 44,182
Commercial Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	1,019	2,129
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	11,232	18,485
Construction Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	3,297	11,422
Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	9,661	9,713
Home Equity Line of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	1,306	1,320
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	$ 56	$ 1,113

Loans Receivable and Credit Q73

Loans Receivable and Credit Quality Loans by Past Due Status (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	$ 0	$ 0
Financing Receivable, Recorded Investment, Nonaccrual Status	26,571,000	44,182,000
Financing Receivable, Recorded Investment, Current	5,679,547,000	5,218,794,000
Total loans	5,719,212,000	5,269,936,000
Financing Receivable, Recorded Investment, Past Due	13,094,000	6,960,000
Commercial Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	1,019,000	2,129,000
Financing Receivable, Recorded Investment, Current	1,107,869,000	950,233,000
Total loans	1,111,555,000	953,085,000
Financing Receivable, Recorded Investment, Past Due	2,667,000	723,000
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	11,232,000	18,485,000
Financing Receivable, Recorded Investment, Current	1,900,282,000	1,769,680,000
Total loans	1,914,134,000	1,788,403,000
Financing Receivable, Recorded Investment, Past Due	2,620,000	238,000
Construction Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	3,297,000	11,422,000
Financing Receivable, Recorded Investment, Current	180,137,000	113,927,000
Total loans	183,434,000	125,349,000
Financing Receivable, Recorded Investment, Past Due	0	0
Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	9,661,000	9,713,000
Financing Receivable, Recorded Investment, Current	2,212,739,000	2,116,591,000
Total loans	2,229,540,000	2,132,095,000
Financing Receivable, Recorded Investment, Past Due	7,140,000	5,791,000
Home Equity Line of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	1,306,000	1,320,000
Financing Receivable, Recorded Investment, Current	118,482,000	113,539,000
Total loans	119,828,000	114,859,000
Financing Receivable, Recorded Investment, Past Due	40,000	0
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	56,000	1,113,000
Financing Receivable, Recorded Investment, Current	160,038,000	154,824,000
Total loans	160,721,000	156,145,000
Financing Receivable, Recorded Investment, Past Due	627,000	208,000
Financing Receivables, 1 to 29 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	7,952,000	26,546,000
Financing Receivables, 1 to 29 Days Past Due [Member] | Commercial Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	726,000	157,000
Financing Receivables, 1 to 29 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	5,912,000	14,235,000
Financing Receivables, 1 to 29 Days Past Due [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	149,000	8,245,000
Financing Receivables, 1 to 29 Days Past Due [Member] | Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	924,000	2,770,000
Financing Receivables, 1 to 29 Days Past Due [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	217,000	98,000
Financing Receivables, 1 to 29 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	24,000	1,041,000
Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	917,000	2,483,000
Financing Receivables, 30 to 89 Days Past Due [Member] | Commercial Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Financing Receivables, 30 to 89 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	0	684,000
Financing Receivables, 30 to 89 Days Past Due [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	34,000	86,000
Financing Receivables, 30 to 89 Days Past Due [Member] | Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	874,000	1,704,000
Financing Receivables, 30 to 89 Days Past Due [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Financing Receivables, 30 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	9,000	9,000
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	10,962,000	4,976,000
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	2,329,000	723,000
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	2,091,000	167,000
Financing Receivables, 30 to 59 Days Past Due [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	6,267,000	3,878,000
Financing Receivables, 30 to 59 Days Past Due [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	40,000	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	235,000	208,000
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	2,132,000	1,984,000
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	338,000	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	529,000	71,000
Financing Receivables, 60 to 89 Days Past Due [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	873,000	1,913,000
Financing Receivables, 60 to 89 Days Past Due [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	392,000	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	17,702,000	15,153,000
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	293,000	1,972,000
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	5,320,000	3,566,000
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	3,114,000	3,091,000
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	7,863,000	5,239,000
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	1,089,000	1,222,000
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	$ 23,000	$ 63,000

Loans Receivable and Credit Q74

Loans Receivable and Credit Quality Loans by Credit Quality Indicator (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 5,719,212	$ 5,269,936
Commercial Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,111,555	953,085
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,914,134	1,788,403
Construction Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	183,434	125,349
Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,229,540	2,132,095
Home Equity Line of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	119,828	114,859
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	160,721	156,145
Performing Financial Instruments [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	5,565,016	5,110,154
Performing Financial Instruments [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	69,211	76,740
Performing Financial Instruments [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	58,414	38,860
Performing Financial Instruments [Member] | Commercial Loan [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,070,438	928,228
Performing Financial Instruments [Member] | Commercial Loan [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	28,643	15,703
Performing Financial Instruments [Member] | Commercial Loan [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	11,455	7,025
Performing Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,841,603	1,703,064
Performing Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	27,594	47,782
Performing Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	33,705	19,072
Performing Financial Instruments [Member] | Construction Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	162,563	100,672
Performing Financial Instruments [Member] | Construction Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	12,974	13,255
Performing Financial Instruments [Member] | Construction Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,600	0
Performing Financial Instruments [Member] | Residential Portfolio Segment [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,213,204	2,112,129
Performing Financial Instruments [Member] | Residential Portfolio Segment [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Performing Financial Instruments [Member] | Residential Portfolio Segment [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,675	10,253
Performing Financial Instruments [Member] | Home Equity Line of Credit [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	118,522	113,017
Performing Financial Instruments [Member] | Home Equity Line of Credit [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Performing Financial Instruments [Member] | Home Equity Line of Credit [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	522
Performing Financial Instruments [Member] | Consumer Portfolio Segment [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	158,686	153,044
Performing Financial Instruments [Member] | Consumer Portfolio Segment [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Performing Financial Instruments [Member] | Consumer Portfolio Segment [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,979	1,988
Nonperforming Financial Instruments [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	26,571	44,182
Nonperforming Financial Instruments [Member] | Commercial Loan [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,019	2,129
Nonperforming Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	11,232	18,485
Nonperforming Financial Instruments [Member] | Construction Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,297	11,422
Nonperforming Financial Instruments [Member] | Residential Portfolio Segment [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	9,661	9,713
Nonperforming Financial Instruments [Member] | Home Equity Line of Credit [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,306	1,320
Nonperforming Financial Instruments [Member] | Consumer Portfolio Segment [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 56	$ 1,113

Loans Receivable and Credit Q75

Loans Receivable and Credit Quality Impaired Loans With and Without Related Allowance (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[1]	$ 23,260	$ 43,438
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		33,390	54,773
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		32,521	38,390
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method		2,754	2,921
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[1]	15,912	18,905
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		17,112	19,552
Impaired Financing Receivable, Related Allowance		1,629	4,185
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		18,546	19,323
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method		637	697
Impaired Financing Receivable, Recorded Investment	[1]	39,172	62,343
Impaired Financing Receivable, Unpaid Principal Balance		50,502	74,325
Impaired Financing Receivable, Average Recorded Investment		51,067	57,713
Impaired Financing Receivable, Interest Income, Cash Basis Method		3,391	3,618
Commercial Loan [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[1]	2,259	2,011
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		2,569	3,095
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		1,638	2,055
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method		836	28
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[1]	15	891
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		15	954
Impaired Financing Receivable, Related Allowance		270	91
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		657	1,111
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method		66	99
Impaired Financing Receivable, Recorded Investment	[1]	2,274	2,902
Impaired Financing Receivable, Unpaid Principal Balance		2,584	4,049
Impaired Financing Receivable, Average Recorded Investment		2,295	3,166
Impaired Financing Receivable, Interest Income, Cash Basis Method		902	127
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[1]	12,116	21,500
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		20,113	28,700
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		17,885	24,921
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method		1,494	2,483
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[1]	7,346	9,065
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		7,775	9,493
Impaired Financing Receivable, Related Allowance		713	2,592
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		8,749	7,925
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method		385	379
Impaired Financing Receivable, Recorded Investment	[1]	19,462	30,565
Impaired Financing Receivable, Unpaid Principal Balance		27,888	38,193
Impaired Financing Receivable, Average Recorded Investment		26,634	32,846
Impaired Financing Receivable, Interest Income, Cash Basis Method		1,879	2,862
Construction Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[1]	1,097	9,221
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		2,132	11,133
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		3,027	1,597
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method		92	0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[1]	2,200	2,200
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		2,356	2,356
Impaired Financing Receivable, Related Allowance		172	172
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		2,200	2,545
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method		0	0
Impaired Financing Receivable, Recorded Investment	[1]	3,297	11,421
Impaired Financing Receivable, Unpaid Principal Balance		4,488	13,489
Impaired Financing Receivable, Average Recorded Investment		5,227	4,142
Impaired Financing Receivable, Interest Income, Cash Basis Method		92	0
Residential Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[1]	7,788	9,650
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		8,576	10,788
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		9,384	9,221
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method		269	406
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[1]	6,351	6,749
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		6,966	6,749
Impaired Financing Receivable, Related Allowance		474	1,330
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		6,940	7,742
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method		186	219
Impaired Financing Receivable, Recorded Investment	[1]	14,139	16,399
Impaired Financing Receivable, Unpaid Principal Balance		15,542	17,537
Impaired Financing Receivable, Average Recorded Investment		16,324	16,963
Impaired Financing Receivable, Interest Income, Cash Basis Method		455	625
Home Equity Line of Credit [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[1]	0	50
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		0	50
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		42	50
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method		2	3
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[1]	0	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		0	0
Impaired Financing Receivable, Related Allowance		0	0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		0	0
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method		0	0
Impaired Financing Receivable, Recorded Investment	[1]	0	50
Impaired Financing Receivable, Unpaid Principal Balance		0	50
Impaired Financing Receivable, Average Recorded Investment		42	50
Impaired Financing Receivable, Interest Income, Cash Basis Method		2	3
Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[1]	0	1,006
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		0	1,007
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		545	546
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method		61	1
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[1]	0	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		0	0
Impaired Financing Receivable, Related Allowance		0	0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		0	0
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method		0	0
Impaired Financing Receivable, Recorded Investment	[1]	0	1,006
Impaired Financing Receivable, Unpaid Principal Balance		0	1,007
Impaired Financing Receivable, Average Recorded Investment		545	546
Impaired Financing Receivable, Interest Income, Cash Basis Method		$ 61	$ 1
[1]	Recorded investment represents the client loan balance net of historical charge-offs and historical nonaccrual interest paid, which was applied to principal.

Loans Receivable and Credit Q76

Loans Receivable and Credit Quality Troubled Debt Restructured Loans (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)Loans		Dec. 31, 2014USD ($)Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	11		7
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 6,661		$ 10,258
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 6,658		$ 9,367
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | Loans	1		4
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 3,701		$ 663
Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	1		0
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 1,298		$ 0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 1,304		$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0		$ 0
Commercial Loan [Member] | Extended Maturity [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Commercial Loan [Member] | Contractual Interest Rate Reduction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Commercial Loan [Member] | Payment Deferral [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Commercial Loan [Member] | Combination of Concessions [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	1	[1]	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 1,304	[1]	$ 0
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	2		1
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 4,850		$ 189
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 4,838		$ 189
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | Loans	1		0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 3,701		$ 0
Commercial Real Estate Portfolio Segment [Member] | Extended Maturity [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	1		1
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 4,118		$ 189
Commercial Real Estate Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Commercial Real Estate Portfolio Segment [Member] | Payment Deferral [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Commercial Real Estate Portfolio Segment [Member] | Combination of Concessions [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	1	[1]	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 720	[1]	$ 0
Construction Loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		2
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 0		$ 8,782
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 7,882
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0		$ 0
Construction Loans [Member] | Extended Maturity [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		2
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 7,882
Construction Loans [Member] | Contractual Interest Rate Reduction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Construction Loans [Member] | Payment Deferral [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Construction Loans [Member] | Combination of Concessions [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Residential Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	8		3
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 513		$ 287
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 516		$ 296
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | Loans	0		4
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0		$ 663
Residential Portfolio Segment [Member] | Extended Maturity [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Residential Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	7		3
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 491		$ 296
Residential Portfolio Segment [Member] | Payment Deferral [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	1		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 25		$ 0
Residential Portfolio Segment [Member] | Combination of Concessions [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Home Equity Line of Credit [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 0		$ 0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0		$ 0
Home Equity Line of Credit [Member] | Extended Maturity [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Home Equity Line of Credit [Member] | Contractual Interest Rate Reduction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Home Equity Line of Credit [Member] | Payment Deferral [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Home Equity Line of Credit [Member] | Combination of Concessions [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		1
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 0		$ 1,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 1,000
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0		$ 0
Consumer Portfolio Segment [Member] | Extended Maturity [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		1
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 1,000
Consumer Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Consumer Portfolio Segment [Member] | Payment Deferral [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Consumer Portfolio Segment [Member] | Combination of Concessions [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
[1]	Combination of concessions includes loans that have had more than one modification, including extension of term, temporary reduction of interest rate, and/or payment deferral.

Loans Receivable and Credit Q77

Loans Receivable and Credit Quality Loans Text Disclosures (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Deferred Income	$ 5,600,000	$ 5,400,000
Servicing Asset	79,700,000	93,800,000
Transfer of Portfolio Loans and Leases to Held-for-sale	0	56,967,000	$ 5,593,000
Gain on sale of loans, net	1,207,000	2,158,000	2,519,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Modifications, Recorded Investment	30,600,000	44,800,000
Loans and Leases Receivable, Impaired, Commitment to Lend	0	300,000
Loans and Leases Receivable, Related Parties	17,000,000	0
Commercial Loans Transferred to Held for Sale [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gain on sale of loans, net		1,600,000
Residential Loans Transferred to Held for Sale [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gain on sale of loans, net			200,000
Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Transfer of Portfolio Loans and Leases to Held-for-sale		57,000,000
Residential Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Transfer of Portfolio Loans and Leases to Held-for-sale			$ 9,100,000
Performing Financial Instruments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Modifications, Recorded Investment	$ 18,600,000	$ 24,300,000

Allowance for Loan Losses Allow

Allowance for Loan Losses Allowance Rollforward (Details) - USD ($) $ in Thousands		3 Months Ended																12 Months Ended
		Dec. 31, 2015		Sep. 30, 2015	[1]	Jun. 30, 2015	[1]	Mar. 31, 2015		Dec. 31, 2014		Sep. 30, 2014	[1]	Jun. 30, 2014	[1]	Mar. 31, 2014		Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Allowance, Beginning of Period								$ 75,838								$ 76,371		$ 75,838		$ 76,371		$ 84,057
Provision/ (credit) for loan losses		$ (1,655)	[1]	$ 2,600		$ 0		(2,500)	[1]	$ 2,400	[1]	$ (2,600)		$ (5,000)		(1,200)	[1]	(1,555)		(6,400)		(10,000)
Loans charged-off																		(2,036)		(5,296)		(5,417)
Financing Receivable, Allowance for Credit Losses, Recovery																		6,253		11,163		7,731
Loans and Leases Receivable, Allowance, End of Period		78,500								75,838								78,500		75,838		76,371
Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Allowance, Beginning of Period								14,114								12,837		14,114		12,837		11,825
Provision/ (credit) for loan losses																		(518)		(237)		11
Loans charged-off																		(253)		(717)		(218)
Financing Receivable, Allowance for Credit Losses, Recovery																		2,471		2,231		1,219
Loans and Leases Receivable, Allowance, End of Period		15,814								14,114								15,814		14,114		12,837
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Allowance, Beginning of Period								43,854								44,979		43,854		44,979		52,497
Provision/ (credit) for loan losses																		(721)		(1,940)		(10,024)
Loans charged-off																		(1,400)		(3,160)		(2,712)
Financing Receivable, Allowance for Credit Losses, Recovery																		2,482		3,975		5,218
Loans and Leases Receivable, Allowance, End of Period		44,215								43,854								44,215		43,854		44,979
Construction Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Allowance, Beginning of Period								4,041								4,465		4,041		4,465		5,016
Provision/ (credit) for loan losses																		1,123		(1,905)		(1,683)
Loans charged-off																		0		(1,100)		(100)
Financing Receivable, Allowance for Credit Losses, Recovery																		1,158		2,581		1,232
Loans and Leases Receivable, Allowance, End of Period		6,322								4,041								6,322		4,041		4,465
Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Allowance, Beginning of Period								10,374								10,732		10,374		10,732		10,892
Provision/ (credit) for loan losses																		342		(2,247)		1,824
Loans charged-off																		(313)		(263)		(2,008)
Financing Receivable, Allowance for Credit Losses, Recovery																		141		2,152		24
Loans and Leases Receivable, Allowance, End of Period		10,544								10,374								10,544		10,374		10,732
Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Allowance, Beginning of Period								1,003								1,020		1,003		1,020		1,085
Provision/ (credit) for loan losses																		82		(32)		271
Loans charged-off																		0		0		(360)
Financing Receivable, Allowance for Credit Losses, Recovery																		0		15		24
Loans and Leases Receivable, Allowance, End of Period		1,085								1,003								1,085		1,003		1,020
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Allowance, Beginning of Period								382								322		382		322		540
Provision/ (credit) for loan losses																		207		(93)		(213)
Loans charged-off																		(70)		(56)		(19)
Financing Receivable, Allowance for Credit Losses, Recovery																		1		209		14
Loans and Leases Receivable, Allowance, End of Period		520								382								520		382		322
Unallocated Financing Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Allowance, Beginning of Period								$ 2,070	[2]							$ 2,016	[2]	2,070	[2]	2,016	[2]	2,202
Provision/ (credit) for loan losses	[2]																	(2,070)		54		(186)
Loans and Leases Receivable, Allowance, End of Period	[2]	$ 0								$ 2,070								$ 0		$ 2,070		$ 2,016
[1]	Due to rounding, the sum of the four quarters may not add to the year to date total.
[2]	As of December 31, 2015, the unallocated reserve was allocated to the qualitative factors as part of the general reserves (ASC 450). The allocation had no effect on the 2015 provision/ (credit) for loan losses.

Allowance for Loan Losses All79

Allowance for Loan Losses Allowance by Impairment Analysis Method (Details) - USD ($)	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	$ 76,871,000		$ 71,653,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	1,629,000		4,185,000
Loans and Leases Receivable, Allowance	78,500,000		75,838,000		$ 76,371,000		$ 84,057,000
Financing Receivable, Collectively Evaluated for Impairment	5,680,040,000		5,207,593,000
Financing Receivable, Individually Evaluated for Impairment	39,172,000		62,343,000
Total loans	5,719,212,000		5,269,936,000
Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	15,544,000		14,023,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	270,000		91,000
Loans and Leases Receivable, Allowance	15,814,000		14,114,000		12,837,000		11,825,000
Financing Receivable, Collectively Evaluated for Impairment	1,109,281,000		950,183,000
Financing Receivable, Individually Evaluated for Impairment	2,274,000		2,902,000
Total loans	1,111,555,000		953,085,000
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	43,502,000		41,262,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	713,000		2,592,000
Loans and Leases Receivable, Allowance	44,215,000		43,854,000		44,979,000		52,497,000
Financing Receivable, Collectively Evaluated for Impairment	1,894,672,000		1,757,839,000
Financing Receivable, Individually Evaluated for Impairment	19,462,000		30,564,000
Total loans	1,914,134,000		1,788,403,000
Construction Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	6,150,000		3,869,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	172,000		172,000
Loans and Leases Receivable, Allowance	6,322,000		4,041,000		4,465,000		5,016,000
Financing Receivable, Collectively Evaluated for Impairment	180,137,000		113,928,000
Financing Receivable, Individually Evaluated for Impairment	3,297,000		11,421,000
Total loans	183,434,000		125,349,000
Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	10,070,000		9,044,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	474,000		1,330,000
Loans and Leases Receivable, Allowance	10,544,000		10,374,000		10,732,000		10,892,000
Financing Receivable, Collectively Evaluated for Impairment	2,215,401,000		2,115,696,000
Financing Receivable, Individually Evaluated for Impairment	14,139,000		16,399,000
Total loans	2,229,540,000		2,132,095,000
Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	1,085,000		1,003,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0
Loans and Leases Receivable, Allowance	1,085,000		1,003,000		1,020,000		1,085,000
Financing Receivable, Collectively Evaluated for Impairment	119,828,000		114,809,000
Financing Receivable, Individually Evaluated for Impairment	0		50,000
Total loans	119,828,000		114,859,000
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	520,000		382,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0
Loans and Leases Receivable, Allowance	520,000		382,000		322,000		540,000
Financing Receivable, Collectively Evaluated for Impairment	160,721,000		155,138,000
Financing Receivable, Individually Evaluated for Impairment	0		1,007,000
Total loans	160,721,000		156,145,000
Unallocated Financing Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	0		2,070,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0
Loans and Leases Receivable, Allowance	0	[1]	2,070,000	[1]	$ 2,016,000	[1]	$ 2,202,000
Financing Receivable, Collectively Evaluated for Impairment	0		0
Financing Receivable, Individually Evaluated for Impairment	0		0
Total loans	0		0
Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	$ 0		$ 0
[1]	As of December 31, 2015, the unallocated reserve was allocated to the qualitative factors as part of the general reserves (ASC 450). The allocation had no effect on the 2015 provision/ (credit) for loan losses.

Allowance for Loan Losses All80

Allowance for Loan Losses Allowance Text (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable, Allowance	$ 78,500	$ 75,838	$ 76,371	$ 84,057
Loans and Leases Receivable, Net of Deferred Income	$ 5,719,212	$ 5,269,936

Premises and Equipment Componen

Premises and Equipment Components of Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 97,561	$ 93,532
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	66,525	61,333
Premises and equipment, net	31,036	32,199
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	43,433	41,625
Furniture Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	49,039	46,809
Building [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	4,715	4,724
Land [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 374	$ 374

Premises and Equipment Future M

Premises and Equipment Future Minimum Lease Payments (Details) $ in Thousands	Dec. 31, 2015USD ($)
Operating Leased Assets [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 19,372
Operating Leases, Future Minimum Payments, Due in Two Years	16,098
Operating Leases, Future Minimum Payments, Due in Three Years	14,998
Operating Leases, Future Minimum Payments, Due in Four Years	13,932
Operating Leases, Future Minimum Payments, Due in Five Years	13,400
Operating Leases, Future Minimum Payments, Due Thereafter	59,090
Operating Leases, Future Minimum Payments Due	$ 136,890

Premises and Equipment Text Det

Premises and Equipment Text Details - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Depreciation	$ 6,590	$ 6,468	$ 6,235
Guarantor Obligations, Maximum Exposure within Next Twelve Months	500
Operating Leases, Rent Expense, Net	$ 19,000	$ 15,700	$ 14,800

Goodwill and Other Intangible84

Goodwill and Other Intangible Assets Carrying Value of Goodwill Rollforward (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Line Items]
Goodwill, Period Increase (Decrease)	$ 0
Goodwill, Beginning of Year	152,082,000	$ 110,180,000
Goodwill, Transfers		0
Goodwill, Acquired During Period	0	41,902,000
Goodwill, End of Year	152,082,000	152,082,000
Private Banking Segment [Member]
Goodwill [Line Items]
Goodwill, Beginning of Year	0	2,403,000
Goodwill, Transfers		(2,403,000)
Goodwill, Acquired During Period		0
Goodwill, End of Year	0	0
Wealth Management and Trust Segment [Member] [Member]
Goodwill [Line Items]
Goodwill, Beginning of Year	44,305,000	0
Goodwill, Transfers		2,403,000
Goodwill, Acquired During Period		41,902,000
Goodwill, End of Year	44,305,000	44,305,000
Investment Managers Segment [Member]
Goodwill [Line Items]
Goodwill, Beginning of Year	66,955,000	66,955,000
Goodwill, Transfers		0
Goodwill, Acquired During Period		0
Goodwill, End of Year	66,955,000	66,955,000
Wealth Advisors Segment [Member]
Goodwill [Line Items]
Goodwill, Beginning of Year	40,822,000	40,822,000
Goodwill, Transfers		0
Goodwill, Acquired During Period		0
Goodwill, End of Year	$ 40,822,000	$ 40,822,000

Goodwill and Other Intangible85

Goodwill and Other Intangible Assets Goodwill and Accumulated Impairment Charges (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill [Line Items]
Goodwill, Gross	$ 236,624	$ 236,624
Goodwill, Impaired, Accumulated Impairment Loss	(84,542)	(84,542)
Goodwill	152,082	152,082	$ 110,180
Private Banking Segment [Member]
Goodwill [Line Items]
Goodwill, Gross	34,281	34,281
Goodwill, Impaired, Accumulated Impairment Loss	(34,281)	(34,281)
Goodwill	0	0	2,403
Wealth Management and Trust Segment [Member] [Member]
Goodwill [Line Items]
Goodwill, Gross	44,305	44,305
Goodwill, Impaired, Accumulated Impairment Loss	0	0
Goodwill	44,305	44,305	0
Investment Managers Segment [Member]
Goodwill [Line Items]
Goodwill, Gross	117,216	117,216
Goodwill, Impaired, Accumulated Impairment Loss	(50,261)	(50,261)
Goodwill	66,955	66,955	66,955
Wealth Advisors Segment [Member]
Goodwill [Line Items]
Goodwill, Gross	40,822	40,822
Goodwill, Impaired, Accumulated Impairment Loss	0	0
Goodwill	$ 40,822	$ 40,822	$ 40,822

Goodwill and Other Intangible86

Goodwill and Other Intangible Assets Goodwill Text (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Line Items]
Goodwill, Acquired During Period	$ 0	$ 41,902
Goodwill, Transfers		0
Goodwill, Impairment Loss	$ 0	0
Wealth Management and Trust Segment [Member] [Member]
Goodwill [Line Items]
Goodwill, Acquired During Period		41,902
Goodwill, Transfers		$ 2,403

Goodwill and Other Intangible87

Goodwill and Other Intangible Assets Gross and Net Carrying Amounts of Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 81,680	$ 81,680
Finite-Lived Intangible Assets, Accumulated Amortization	48,673	41,962
Finite-Lived Intangible Assets, Net	33,007	39,718
Advisory Contracts [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	75,013	75,013
Finite-Lived Intangible Assets, Accumulated Amortization	44,046	37,676
Finite-Lived Intangible Assets, Net	30,967	37,337
Employment Contracts [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	3,247	3,247
Finite-Lived Intangible Assets, Accumulated Amortization	3,247	3,247
Finite-Lived Intangible Assets, Net	0	0
Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	2,040	2,040
Finite-Lived Intangible Assets, Accumulated Amortization	0	0
Finite-Lived Intangible Assets, Net	2,040	2,040
Servicing Contracts [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	1,380	1,380
Finite-Lived Intangible Assets, Accumulated Amortization	1,380	1,039
Finite-Lived Intangible Assets, Net	$ 0	$ 341

Goodwill and Other Intangible88

Goodwill and Other Intangible Assets Intangible Assets Text (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 0
Amortization of Intangible Assets	$ 6,711	$ 4,836	$ 4,327
Finite-Lived Intangible Assets, Remaining Amortization Period	7 years 10 months 29 days
Advisory Contracts [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired		$ 23,900

Goodwill and Other Intangible89

Goodwill and Other Intangible Assets Future Amortization Expense on Intangible Assets (Details) $ in Thousands	Dec. 31, 2015USD ($)
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	$ 6,282
Finite-Lived Intangible Assets, Amortization Expense, Year Two	5,678
Finite-Lived Intangible Assets, Amortization Expense, Year Three	4,438
Finite-Lived Intangible Assets, Amortization Expense, Year Four	3,508
Finite-Lived Intangible Assets, Amortization Expense, Year Five	$ 3,248

Derivatives and Hedging Activ90

Derivatives and Hedging Activities Derivatives Fair Value and Balance Sheet Classification (Details) - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014
Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	[1]	$ 7,960	$ 5,357
Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	[1]	(10,002)	(8,786)
Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	[1]	0	34
Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	[1]	(1,907)	(3,352)
Interest Rate Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	[1]	7,960	5,323
Interest Rate Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	[1]	$ (8,095)	$ (5,434)
[1]	For additional details, see Part II. Item 8. “Financial Statements and Supplementary Data - Note 21: Fair Value of Financial Instruments.”

Derivatives and Hedging Activ91

Derivatives and Hedging Activities Effect of Derivative Instruments on Statement of Operations (Details) - Interest Rate Contract [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Other Comprehensive Income (Loss) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	$ (2,642)	$ (3,425)
Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	$ (4,052)	$ (3,198)

Derivatives and Hedging Activ92

Derivatives and Hedging Activities (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative, Collateral, Obligation to Return Cash	$ 9.7	$ 8.9
Collateral Already Posted, Aggregate Fair Value	2	3.7
Derivative, Collateral, Right to Reclaim Securities	$ 9.8	$ 7

Derivatives and Hedging Activ93

Derivatives and Hedging Activities Cash Flow Hedges Text Description (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015USD ($)contracts	Dec. 31, 2014USD ($)
Derivative [Line Items]
Loss on Cash Flow Hedge Ineffectiveness	$ 0	$ 0
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	1.4
Interest Rate Swap [Member] | Holding Company [Member] | Trust II $75m Cash Flow Hedge [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	$ 75
Objectives for Using Derivative Instruments	The Company’s objective in using derivatives is to add stability to interest income and expense and to manage the risk related to exposure to changes in interest rates. To accomplish this objective, the Holding Company entered into an interest rate swap in the second quarter of 2010
Derivative, Term of Contract	5 years
Debt Instrument, Convertible, Effective Interest Rate	6.25%
Derivative, Average Variable Interest Rate	4.45%
Derivative, Maturity Date	Dec. 30, 2015
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Private Banking Segment [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	$ 150
Number of Interest Rate Derivatives Held | contracts	6
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Private Banking Segment [Member] | Bank $25m LIBOR Swap effective 8/1/13 [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	$ 25
Objectives for Using Derivative Instruments	to reduce its exposure to variability in interest-related cash outflows attributable to changes in the LIBOR swap rate associated with borrowing programs for each of the periods, initially expected to be accomplished with LIBOR-indexed brokered deposits, but may also include LIBOR-indexed FHLB advances
Derivative, Inception Date	Aug. 1, 2013
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Private Banking Segment [Member] | Bank $25m LIBOR Swap effective 3/1/14 [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	$ 25
Objectives for Using Derivative Instruments	to reduce its exposure to variability in interest-related cash outflows attributable to changes in the LIBOR swap rate associated with borrowing programs for each of the periods, initially expected to be accomplished with LIBOR-indexed brokered deposits, but may also include LIBOR-indexed FHLB advances
Derivative, Inception Date	Mar. 1, 2014
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Private Banking Segment [Member] | Bank $25m LIBOR Swap effective 6/1/14 [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	$ 25
Objectives for Using Derivative Instruments	to reduce its exposure to variability in interest-related cash outflows attributable to changes in the LIBOR swap rate associated with borrowing programs for each of the periods, initially expected to be accomplished with LIBOR-indexed brokered deposits, but may also include LIBOR-indexed FHLB advances
Derivative, Inception Date	Jun. 1, 2014
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Private Banking Segment [Member] | Bank $25m LIBOR Swap effective 9/2/14 [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	$ 25
Objectives for Using Derivative Instruments	to reduce its exposure to variability in interest-related cash outflows attributable to changes in the LIBOR swap rate associated with borrowing programs for each of the periods, initially expected to be accomplished with LIBOR-indexed brokered deposits, but may also include LIBOR-indexed FHLB advances
Derivative, Inception Date	Sep. 2, 2014
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Private Banking Segment [Member] | Bank $25m LIBOR Swap effective 12/1/14 [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	$ 25
Objectives for Using Derivative Instruments	to reduce its exposure to variability in interest-related cash outflows attributable to changes in the LIBOR swap rate associated with borrowing programs for each of the periods, initially expected to be accomplished with LIBOR-indexed brokered deposits, but may also include LIBOR-indexed FHLB advances
Derivative, Inception Date	Dec. 1, 2014
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Private Banking Segment [Member] | Bank $25m LIBOR Swap 2014 effective 6/1/14 [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	$ 25
Objectives for Using Derivative Instruments	to reduce its exposure to variability in interest-related cash outflows attributable to changes in the LIBOR swap rate associated with borrowing programs for each of the periods, initially expected to be accomplished with LIBOR-indexed brokered deposits, but may also include LIBOR-indexed FHLB advances
Derivative, Inception Date	Jun. 1, 2014
Minimum [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Private Banking Segment [Member] | Bank $25m LIBOR Swap effective 8/1/13 [Member]
Derivative [Line Items]
Derivative, Term of Contract	3 years
Derivative, Fixed Interest Rate	1.17%
Minimum [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Private Banking Segment [Member] | Bank $25m LIBOR Swap effective 3/1/14 [Member]
Derivative [Line Items]
Derivative, Term of Contract	3 years
Derivative, Fixed Interest Rate	1.17%
Minimum [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Private Banking Segment [Member] | Bank $25m LIBOR Swap effective 6/1/14 [Member]
Derivative [Line Items]
Derivative, Term of Contract	3 years
Derivative, Fixed Interest Rate	1.17%
Minimum [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Private Banking Segment [Member] | Bank $25m LIBOR Swap effective 9/2/14 [Member]
Derivative [Line Items]
Derivative, Term of Contract	3 years
Derivative, Fixed Interest Rate	1.17%
Minimum [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Private Banking Segment [Member] | Bank $25m LIBOR Swap effective 12/1/14 [Member]
Derivative [Line Items]
Derivative, Term of Contract	3 years
Derivative, Fixed Interest Rate	1.17%
Minimum [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Private Banking Segment [Member] | Bank $25m LIBOR Swap 2014 effective 6/1/14 [Member]
Derivative [Line Items]
Derivative, Term of Contract	3 years
Derivative, Fixed Interest Rate	1.17%
Weighted Average [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Private Banking Segment [Member] | Bank $25m LIBOR Swap effective 8/1/13 [Member]
Derivative [Line Items]
Derivative, Fixed Interest Rate	1.85%
Weighted Average [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Private Banking Segment [Member] | Bank $25m LIBOR Swap effective 3/1/14 [Member]
Derivative [Line Items]
Derivative, Fixed Interest Rate	1.85%
Weighted Average [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Private Banking Segment [Member] | Bank $25m LIBOR Swap effective 6/1/14 [Member]
Derivative [Line Items]
Derivative, Fixed Interest Rate	1.85%
Weighted Average [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Private Banking Segment [Member] | Bank $25m LIBOR Swap effective 9/2/14 [Member]
Derivative [Line Items]
Derivative, Fixed Interest Rate	1.85%
Weighted Average [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Private Banking Segment [Member] | Bank $25m LIBOR Swap effective 12/1/14 [Member]
Derivative [Line Items]
Derivative, Fixed Interest Rate	1.85%
Weighted Average [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Private Banking Segment [Member] | Bank $25m LIBOR Swap 2014 effective 6/1/14 [Member]
Derivative [Line Items]
Derivative, Fixed Interest Rate	1.85%
Maximum [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Private Banking Segment [Member] | Bank $25m LIBOR Swap effective 8/1/13 [Member]
Derivative [Line Items]
Derivative, Term of Contract	6 years
Derivative, Fixed Interest Rate	2.32%
Maximum [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Private Banking Segment [Member] | Bank $25m LIBOR Swap effective 3/1/14 [Member]
Derivative [Line Items]
Derivative, Term of Contract	6 years
Derivative, Fixed Interest Rate	2.32%
Maximum [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Private Banking Segment [Member] | Bank $25m LIBOR Swap effective 6/1/14 [Member]
Derivative [Line Items]
Derivative, Term of Contract	6 years
Derivative, Fixed Interest Rate	2.32%
Maximum [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Private Banking Segment [Member] | Bank $25m LIBOR Swap effective 9/2/14 [Member]
Derivative [Line Items]
Derivative, Term of Contract	6 years
Derivative, Fixed Interest Rate	2.32%
Maximum [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Private Banking Segment [Member] | Bank $25m LIBOR Swap effective 12/1/14 [Member]
Derivative [Line Items]
Derivative, Term of Contract	6 years
Derivative, Fixed Interest Rate	2.32%
Maximum [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Private Banking Segment [Member] | Bank $25m LIBOR Swap 2014 effective 6/1/14 [Member]
Derivative [Line Items]
Derivative, Term of Contract	6 years
Derivative, Fixed Interest Rate	2.32%
London Interbank Offered Rate (LIBOR) [Member] | Holding Company [Member] | Trust II $75m Cash Flow Hedge [Member]
Derivative [Line Items]
Derivative, Basis Spread on Variable Rate	1.68%

Derivatives and Hedging Activ94

Derivatives and Hedging Activities Non-designated Hedges Text description (Details) - Not Designated as Hedging Instrument [Member] $ in Millions	Dec. 31, 2015USD ($)contracts	Dec. 31, 2014USD ($)contracts
Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Number of Instruments Held | contracts	76	24
Derivative, Notional Amount | $	$ 475.3	$ 238.7
Foreign Exchange Contract [Member]
Derivative [Line Items]
Derivative, Number of Instruments Held | contracts	0	0
Loan Participations and Assignments [Member]
Derivative [Line Items]
Derivative, Notional Amount | $	$ 8.3	$ 0

Derivatives and Hedging Activ95

Derivatives and Hedging Activities Derivatives not designated as hedges, effect on statement of operations (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Description of Location of Gain (Loss) on Interest Rate Derivative on Income Statement		Other income/(expense)
Description of Location of Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments in Financial Statements		Other income/(expense)
Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net		$ 32	$ (127)
Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net		(12)	(127)
Not Designated as Hedging Instrument [Member] | Loan Participations and Assignments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	[1]	$ 44	$ 0
[1]	Risk Participation Agreement

Deposits (Details)

Deposits (Details) - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014
Deposits by Type [Line Items]
Noninterest-bearing Domestic Deposit, Demand		$ 1,689,604	$ 1,418,426
Deposits, Negotiable Order of Withdrawal (NOW)	[1]	588,337	549,320
Deposits, Savings Deposits		72,336	71,367
Deposits, Money Market Deposits	[1]	3,105,172	2,816,928
Time Deposits, Less than $100,000	[1]	173,011	185,721
Time Deposits, $100,000 or More		411,977	412,117
Deposits		$ 6,040,437	$ 5,453,879
[1]	Includes brokered deposits

Deposits Schedule of Maturities

Deposits Schedule of Maturities of Certificates of Deposit (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Time Deposits [Line Items]
Time Deposit Maturities, Less than Three Months	$ 192,702	$ 171,157
Time Deposit Maturities, Three to Six Months	136,635	126,109
Time Deposit Maturities, Six to Twelve Months	111,674	121,654
Time Deposit Maturities, After One but Within Three Years	120,939	120,701
Time Deposit Maturities, After Three but Within Five Years	22,035	41,706
Time Deposit Maturities, after Year Five	1,003	16,511
Time Deposits	$ 584,988	$ 597,838

Deposits Deposits Text Details

Deposits Deposits Text Details (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Deposits Text Disclosures [Abstract]
Interest Expense, Time Deposits, $100,000 or More	$ 2.3	$ 2.3	$ 2.4
Deposit Liabilities Reclassified as Loans Receivable	$ 0.3	$ 0.6

Federal Funds Purchased and S99

Federal Funds Purchased and Securities Sold Under Agreements to Repurchase (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Short-term Debt [Line Items]
Federal Funds Purchased	$ 0	$ 0	$ 0
Securities Sold under Agreements to Repurchase	58,215	30,496	102,353
Available-for-sale Securities Pledged as Collateral	187,400	205,900
Federal Funds Lines of Credit, Amount of Available Unused Funds	565,000	171,000
Federal Funds Purchased [Member]
Short-term Debt [Line Items]
Short-term Debt, Maximum Month-end Outstanding Amount	102,000	75,000	90,000
Short-term Debt, Average Outstanding Amount	$ 10,008	$ 1,671	$ 4,732
Short-term Debt, Weighted Average Interest Rate	0.00%	0.00%	0.00%
Debt Instrument, Interest Rate During Period	0.31%	0.33%	0.30%
Securities Sold under Agreements to Repurchase [Member]
Short-term Debt [Line Items]
Short-term Debt, Maximum Month-end Outstanding Amount	$ 75,313	$ 154,448	$ 125,971
Short-term Debt, Average Outstanding Amount	$ 64,320	$ 108,191	$ 102,643
Short-term Debt, Weighted Average Interest Rate	0.05%	0.05%	0.05%
Debt Instrument, Interest Rate During Period	0.05%	0.05%	0.36%

Federal Home Loan Bank Borro100

Federal Home Loan Bank Borrowings (Details) $ in Thousands	Dec. 31, 2015USD ($)
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Federal Home Loan Bank, Advances, Maturities Summary, Due in Next Twelve Months	$ 216,601
Federal Home Loan Bank, Advances, Maturities Summary, Average Interest Rate of Amounts Due within One Year of Balance Sheet Date	1.34%
Federal Home Loan Bank, Advances, Maturities Summary, Due in Year Two	$ 100,271
Federal Home Loan Bank, Advances, Maturities Summary, Average Interest Rate, One to Two Years from Balance Sheet Date	1.90%
Federal Home Loan Bank, Advances, Maturities Summary, Due in Year Three	$ 88,974
Federal Home Loan Bank, Advances, Maturities Summary, Average Interest Rate, Two to Three Years from Balance Sheet Date	1.53%
Federal Home Loan Bank, Advances, Maturities Summary, Due in Year Four	$ 8,561
Federal Home Loan Bank, Advances, Maturities Summary, Average Interest Rate, Three to Four Years from Balance Sheet Date	1.75%
Federal Home Loan Bank, Advances, Maturities Summary, Due in Year Five	$ 34,365
Federal Home Loan Bank, Advances, Maturities Summary, Average Interest Rate, Four to Five Years from Balance Sheet Date	3.40%
Federal Home Loan Bank, Advances, Maturities Summary, Due after Year Five	$ 12,552
Federal Home Loan Bank, Advances, Maturities Summary, Average Interest Rate, after Five Years from Balance Sheet Date	3.21%
Federal Home Loan Bank, Advances	$ 461,324
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Weighted Average Interest Rate	1.71%

Federal Home Loan Bank Borro101

Federal Home Loan Bank Borrowings FHLB Text (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Description of Collateral Pledged	Borrowings from the FHLB are secured by the Bank’s stock investment in the FHLB and a blanket lien on “qualified collateral” defined principally as a percentage of the principal balance of certain types of mortgage loans. The stock investment cannot be used for additional borrowing collateral. The percentage of collateral valuation from the FHLB varies between 50% and 80% based on the underlying collateral.
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	$ 2,200,000	$ 2,100,000
Federal Home Loan Bank borrowings	461,324	370,150
Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available	1,200,000	1,200,000
FHLB Borrowings Callable Before Maturity	11,000	13,000
Stock in Federal Home Loan Banks	35,181	32,281
Federal Home Loan Bank of Boston [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Stock in Federal Home Loan Banks	$ 34,200	$ 27,500
Minimum [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Federal Home Loan Bank Stock Ownership as a Percent of Outstanding Advances	3.00%
Maximum [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Federal Home Loan Bank Stock Ownership as a Percent of Outstanding Advances	4.50%

Junior Subordinated Debentur102

Junior Subordinated Debentures (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust	$ 106,363	$ 106,363
Junior subordinated debentures, Maturities, Repayments of Principal after Year Five	106,363	106,363
Boston Private Capital Trust II [Member]
Debt Instrument [Line Items]
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust	103,093	103,093
Boston Private Capital Trust I [Member]
Debt Instrument [Line Items]
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust	$ 3,270	$ 3,270

Junior Subordinated Debentur103

Junior Subordinated Debentures Boston Private Capital Trust II Terms (Details) - Boston Private Capital Trust II [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 100
Debt Instrument, Frequency of Periodic Payment	quarterly
Debt Instrument, Description of Variable Rate Basis	three-month LIBOR plus
Debt Instrument, Basis Spread on Variable Rate	1.68%
Debt Instrument, Interest Rate Terms	provided, however, that the interest rate does not exceed the highest rate permitted by New York law, and may be modified by the U.S. law of general application
Debt Instrument, Interest Rate at Period End	2.28%
Assets Held-in-trust	$ 3.1	$ 3.1
Debt Instrument, Covenant Compliance	At December 31, 2015, the Company was in compliance with the above covenants.	At December 31, 2014, the Company was in compliance with the above covenants.
Debt Instrument, Maturity Date	Dec. 30, 2035
Debt Instrument, Call Feature	became redeemable after December 30, 2010

Junior Subordinated Debentur104

Junior Subordinated Debentures Boston Private Capital Trust I Terms (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended			60 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2013
Debt Instrument [Line Items]
Gain on repurchase of debt	$ 0	$ 0	$ 620
Boston Private Capital Trust I [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 105,000
Junior Subordinated Debt, Liquidation Price per Share	$ 50
Debt Instrument, Frequency of Periodic Payment	quarterly
Debt Instrument, Interest Rate Terms	fixed
Debt Instrument, Interest Rate at Period End	4.875%
Debt Instrument, Maturity Date	Oct. 1, 2034
Extinguishment of Debt, Amount	$ 0	0		$ 105,000
Gain on repurchase of debt				$ 26,500
Assets Held-in-trust	$ 3,200	$ 3,200

Noncontrolling Interests Compon

Noncontrolling Interests Components of Redeemable Noncontrolling Interests (Details) - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014
Redeemable Noncontrolling Interest [Line Items]
Redeemable noncontrolling interests		$ 18,088	$ 20,905
Stockholders' Equity Attributable to Noncontrolling Interest		21,481	21,291
Nonredeemable Noncontrolling Interest		3,393	386
Anchor [Member]
Redeemable Noncontrolling Interest [Line Items]
Redeemable and Nonredeemable Noncontrolling Interest		11,907	11,929
Nonredeemable Noncontrolling Interest		1,300	386
BOS [Member]
Redeemable Noncontrolling Interest [Line Items]
Redeemable and Nonredeemable Noncontrolling Interest		6,744
Redeemable noncontrolling interests			6,069
Nonredeemable Noncontrolling Interest		2,100
DGHM [Member]
Redeemable Noncontrolling Interest [Line Items]
Redeemable noncontrolling interests	[1]	$ 2,830	$ 3,293
[1]	Only includes redeemable noncontrolling interests.

Noncontrolling Interests Redeem

Noncontrolling Interests Redeemable Noncontrolling Interests Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2015		Sep. 30, 2015	[1]	Jun. 30, 2015	[1]	Mar. 31, 2015		Dec. 31, 2014		Sep. 30, 2014	[1]	Jun. 30, 2014	[1]	Mar. 31, 2014		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Redeemable Noncontrolling Interest [Line Items]
Redeemable Noncontrolling Interests, Equity, Carrying Amount, Beginning of Period							$ 20,905										$ 20,905
Nonredeemable Noncontrolling Interest, Beginning of Period							386										386
Net Income (Loss) Attributable to Noncontrolling Interest	$ 921	[1]	$ 994		$ 1,263		1,229	[1]	$ 1,322	[1]	$ 1,167		$ 1,025		$ 1,236	[1]	4,407	$ 4,750	$ 3,948
Redeemable Noncontrolling Interests, Equity, Carrying Amount, End of Period	18,088								20,905								18,088	20,905
Nonredeemable Noncontrolling Interest, End of Period	3,393								386								3,393	386
Anchor [Member]
Redeemable Noncontrolling Interest [Line Items]
Nonredeemable Noncontrolling Interest, Beginning of Period							386										386
Nonredeemable Noncontrolling Interest, End of Period	1,300								386								1,300	386
Redeemable Noncontrolling Interest [Member]
Redeemable Noncontrolling Interest [Line Items]
Redeemable Noncontrolling Interests, Equity, Carrying Amount, Beginning of Period							20,905								19,468		20,905	19,468	19,287
Net Income (Loss) Attributable to Noncontrolling Interest																	3,575	4,564	3,849
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders																	(4,189)	(4,426)	(3,363)
Redeemable Noncontrolling Interest Increase, Purchase or Sale of Additional Ownership Interest																	1,666	1,879	0
Noncontrolling Interest, Increase from Subsidiary Equity Issuance																	(1,652)	0
Amortization of Noncontrolling Interest Equity Compensation																	0	0
Noncontrolling Interest, Period Increase (Decrease)																	1,115	3,178	(305)
Redeemable Noncontrolling Interests, Equity, Carrying Amount, End of Period	18,088								20,905								18,088	20,905	19,468
Noncontrolling Interest [Member]
Redeemable Noncontrolling Interest [Line Items]
Nonredeemable Noncontrolling Interest, Beginning of Period							$ 386								$ 171		386	171	0
Net Income (Loss) Attributable to Noncontrolling Interest																	832	186	99
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders																	422	177	53
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests																	(419)	(74)	(125)
Noncontrolling Interest, Increase from Subsidiary Equity Issuance																	1,652	0
Amortization of Noncontrolling Interest Equity Compensation																	472	96
Noncontrolling Interest, Period Increase (Decrease)																	54	36	0
Nonredeemable Noncontrolling Interest, End of Period	$ 3,393								$ 386								$ 3,393	$ 386	$ 171
[1]	Due to rounding, the sum of the four quarters may not add to the year to date total.

Noncontrolling Interests Text D

Noncontrolling Interests Text Details (Details) - USD ($) $ in Thousands		3 Months Ended																12 Months Ended
		Dec. 31, 2015		Sep. 30, 2015	[1]	Jun. 30, 2015	[1]	Mar. 31, 2015	[1]	Dec. 31, 2014		Sep. 30, 2014	[1]	Jun. 30, 2014	[1]	Mar. 31, 2014	[1]	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Noncontrolling Interest [Line Items]
Net Income (Loss) Attributable to Noncontrolling Interest		$ 921	[1]	$ 994		$ 1,263		$ 1,229		$ 1,322	[1]	$ 1,167		$ 1,025		$ 1,236		$ 4,407	$ 4,750	$ 3,948
Redeemable noncontrolling interests		18,088								20,905								18,088	20,905
Nonredeemable Noncontrolling Interest		3,393								386								3,393	386
Anchor [Member]
Noncontrolling Interest [Line Items]
Redeemable and Nonredeemable Noncontrolling Interest		11,907								11,929								11,907	11,929
Nonredeemable Noncontrolling Interest		1,300								386								1,300	386
BOS [Member]
Noncontrolling Interest [Line Items]
Redeemable and Nonredeemable Noncontrolling Interest		6,744																6,744
Redeemable noncontrolling interests										6,069									6,069
Nonredeemable Noncontrolling Interest		2,100																2,100
DGHM [Member]
Noncontrolling Interest [Line Items]
Redeemable noncontrolling interests	[2]	$ 2,830								$ 3,293								$ 2,830	$ 3,293
[1]	Due to rounding, the sum of the four quarters may not add to the year to date total.
[2]	Only includes redeemable noncontrolling interests.

Equity Preferred Stock (Details

Equity Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Class of Stock [Line Items]
Depositary Shares, Issued	2,000,000	2,000,000
Preferred Stock, Par Value Per Share	$ 1	$ 1
Preferred Stock, Value, Issued	$ 47,753	$ 47,753
Series D Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Contract Terms	Each Depositary Share represents a 1/40th interest in a share
Preferred Stock, Dividend Rate, Percentage	6.95%
Preferred Stock, Par Value Per Share	$ 1
Preferred Stock, Liquidation Preference Per Share	$ 1,000	$ 1,000
Preferred Stock, Value, Issued	$ 47,753	$ 47,800

Equity Common Stock (Details)

Equity Common Stock (Details) - shares	Dec. 31, 2015	Dec. 31, 2014
Class of Stock [Line Items]
Common Stock, Shares Authorized	170,000,000	170,000,000
Common Stock, Shares, Issued	83,410,961	82,961,855
Common Stock, Capital Shares Reserved for Future Issuance	86,589,039	87,038,145

Equity Warrants to Purchase Com

Equity Warrants to Purchase Common Stock (Details)	12 Months Ended
	Dec. 31, 2015$ / sharesshares	[1]
Class of Warrant or Right [Line Items]
Class of Warrant or Right, Outstanding	2,887,500,000
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right	1.08	[2]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares	$ 7.411	[2]
Class of Warrant or Right, Date from which Warrants or Rights Exercisable	Nov. 21, 2008
Class of Warrant or Right, Date until which Warrants or Rights Exercisable	Nov. 21, 2018
[1]	The TARP warrants, while initially issued to the Treasury, were purchased from the Treasury by unrelated third parties at a market rate.
[2]	Per the terms of the TARP warrants agreement, the exercise price and number of shares issuable upon exercise may be adjusted ratably for dividends paid on the Company’s common stock that exceed the dividend rate at the time the warrants were issued, at which time the Company paid quarterly dividends of $0.01 per share. The current warrant share number and current exercise price of the warrant reflect the warrant as adjusted for common stock dividends through February 10, 2016, the latest dividend record date prior to the filing of this Annual Report.

Equity Other Comprehensive Inco

Equity Other Comprehensive Income (Details) - USD ($) $ in Thousands		3 Months Ended																12 Months Ended
		Dec. 31, 2015	[2]	Sep. 30, 2015	[2]	Jun. 30, 2015	[2]	Mar. 31, 2015	[2]	Dec. 31, 2014	[2]	Sep. 30, 2014	[2]	Jun. 30, 2014	[2]	Mar. 31, 2014	[2]	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Components of Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax																		$ (2,494)		$ 6,231		$ (11,797)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax																		(1,145)		2,495		(4,656)
Unrealized gain/ (loss) on securities available for sale																		(1,349)		3,736		(7,141)
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, before Tax																		236		(7)		49
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Tax																		97		(3)		21
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax																		(139)		4		(28)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax																		(2,730)		6,238		(11,846)
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax																		(1,242)		2,498		(4,677)
Net unrealized gain/ (loss) on securities available for sale																		(1,488)		3,740		(7,169)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax																		(2,642)		(3,425)		15
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax																		(1,088)		(1,416)		13
Unrealized gain/ (loss) on cash flow hedges																		(1,554)		(2,009)		2
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax																		4,052		3,198		2,083
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Tax																		1,698		1,349		879
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax																		2,354		1,849		1,204
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax																		1,410		(227)		2,098
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax																		610		(67)		892
Net unrealized gain/ (loss) on cash flow hedges																		800		(160)		1,206
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax, Portion Attributable to Parent																		(193)		(135)		(652)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax																		(78)		(55)		(294)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax																		(115)		(80)		(358)
Other Comprehensive Income (Loss), before Tax																		(1,513)		5,876		(10,400)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent																		(710)		2,376		(4,079)
Other comprehensive income/ (loss), net of tax																		(803)		3,500		(6,321)
Net Income Attributable to the Parent Before Tax	[1]																	95,317		101,180		103,498
Income tax expense/(benefit)		$ 5,638		$ 8,182		$ 8,000		$ 8,572		$ 5,901		$ 8,993		$ 10,333		$ 7,138		30,392	[3]	32,365	[3]	32,963	[3]
Net income attributable to the Company		$ 15,002		$ 13,530		$ 17,610		$ 18,783		$ 12,177		$ 18,265		$ 21,332		$ 17,041		64,925		68,815		70,535
Comprehensive Income (Loss), Before Tax, Attributable to Parent																		93,804		107,056		93,098
Comprehensive Income (Loss), Tax, Attributable to Parent																		29,682		34,741		28,884
Total comprehensive income attributable to the Company, net																		$ 64,122		$ 72,315		$ 64,214
[1]	Pre-tax net income attributable to the Company is calculated as income before income taxes, plus net income from discontinued operations, less net income attributable to noncontrolling interests.
[2]	Due to rounding, the sum of the four quarters may not add to the year to date total.
[3]	The Company’s effective tax rate for 2015, 2014, and 2013 are not consistent due to earnings from tax-exempt investments, non-deductible compensation, state and local taxes, income tax credits and income attributable to noncontrolling interests having a different impact on the effective tax rate due primarily to the different levels of income before taxes in years 2015, 2014, and 2013. See Part II. Item 8. “Financial Statements and Supplementary Data - Note 17: Income Taxes” for additional details.

Equity Change in OCI Recognized

Equity Change in OCI Recognized in Statement of Operations, Line Item (Details) - USD ($) $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2015	[1]	Sep. 30, 2015	[1]	Jun. 30, 2015	[1]	Mar. 31, 2015	[1]	Dec. 31, 2014	[1]	Sep. 30, 2014	[1]	Jun. 30, 2014	[1]	Mar. 31, 2014	[1]	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification adjustment for net realized gain included in net income																	$ 139		$ (4)		$ 28
Gain on sale of investments, net																	236		(7)		49
Income tax expense/(benefit)	$ 5,638		$ 8,182		$ 8,000		$ 8,572		$ 5,901		$ 8,993		$ 10,333		$ 7,138		30,392	[2]	32,365	[2]	32,963	[2]
Net income attributable to the Company	$ 15,002		$ 13,530		$ 17,610		$ 18,783		$ 12,177		$ 18,265		$ 21,332		$ 17,041		64,925		68,815		70,535
Interest Expense, Deposits																	16,002		14,102		13,395
Interest Expense, Junior Subordinated Debentures																	3,875		3,872		4,408
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax																	(2,354)		(1,849)		(1,204)
Accumulated Net Unrealized Investment Gain (Loss) [Member] | Reclassification Out of Accumulated Comprehensive Income, Pre-tax [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gain on sale of investments, net																	236		(7)		49
Accumulated Net Unrealized Investment Gain (Loss) [Member] | Reclassification Out of Accumulated Comprehensive Income, Tax effect [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense/(benefit)																	97		(3)		21
Accumulated Net Unrealized Investment Gain (Loss) [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income attributable to the Company																	139		(4)		28
Hedges related to junior subordinated debt [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Reclassification Out of Accumulated Comprehensive Income, Pre-tax [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest Expense, Junior Subordinated Debentures																	1,879		1,926		1,894
Hedges related to junior subordinated debt [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Reclassification Out of Accumulated Comprehensive Income, Tax effect [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense/(benefit)																	804		824		799
Hedges related to junior subordinated debt [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income attributable to the Company																	(1,075)		(1,102)		(1,095)
Hedges related to deposits [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Reclassification Out of Accumulated Comprehensive Income, Pre-tax [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest Expense, Deposits																	2,173		1,272		189
Hedges related to deposits [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Reclassification Out of Accumulated Comprehensive Income, Tax effect [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense/(benefit)																	894		525		80
Hedges related to deposits [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income attributable to the Company																	$ (1,279)		$ (747)		$ (109)
[1]	Due to rounding, the sum of the four quarters may not add to the year to date total.
[2]	The Company’s effective tax rate for 2015, 2014, and 2013 are not consistent due to earnings from tax-exempt investments, non-deductible compensation, state and local taxes, income tax credits and income attributable to noncontrolling interests having a different impact on the effective tax rate due primarily to the different levels of income before taxes in years 2015, 2014, and 2013. See Part II. Item 8. “Financial Statements and Supplementary Data - Note 17: Income Taxes” for additional details.

Equity Accumulated Other Compre

Equity Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Components of Accumulated Other Comprehensive Income [Line Items] [Abstract]
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	$ 495	$ 1,983	$ (1,757)
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	(1,123)	(1,923)	(1,763)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	(872)	(757)	(677)
Accumulated other comprehensive income/ (loss)	$ (1,500)	$ (697)	$ (4,197)

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended																12 Months Ended
		Dec. 31, 2015		Sep. 30, 2015		Jun. 30, 2015		Mar. 31, 2015		Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Income from Continuing Operations, Including Portion Attributable to Noncontrolling Interest																		$ 62,921	$ 67,405	$ 66,691
Net Income (Loss) Attributable to Noncontrolling Interest		$ 921	[1]	$ 994	[1]	$ 1,263	[1]	$ 1,229	[1]	$ 1,322	[1]	$ 1,167	[1]	$ 1,025	[1]	$ 1,236	[1]	4,407	4,750	3,948
Income (Loss) from Continuing Operations Attributable to Parent																		58,514	62,655	62,743
Noncontrolling Interest, Change in Redemption Value	[2]																	464	(525)	(368)
Preferred Stock Dividends and Other Adjustments																		(3,566)	(3,703)	(14,689)	[3]
Other Preferred Stock Dividends and Adjustments																		(3,102)	(4,228)	(15,057)
Net Income Loss Continuing Available to Common Shareholders Basic Before Participating																		55,412	58,427	47,686
Undistributed Earnings Continuing Ops Allocated to Participating Securities																		(74)	(282)	(1,243)
Net Income (Loss) from Continuing Ops Available to Common Stockholders, Basic																		55,338	58,145	46,443
Net income from discontinued operations		$ 1,455	[1]	$ 1,316	[1]	$ 1,546	[1]	$ 2,094	[1]	$ 1,510	[1]	$ 1,272	[1]	$ 1,450	[1]	$ 1,928	[1]	6,411	6,160	7,792
Undistributed Earnings Discontinued Operations Allocated to Participating Securities																		(18)	(53)	(336)
Net Income (Loss) from Discontinued Ops Available to Common Stockholders, Basic																		6,393	6,107	7,456
Net Income (Loss) Available to Common Stockholders Basic before Allocation to Participating Securities																		61,823	64,587	55,478
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic																		92	335	1,579
Net income attributable to common shareholders for basic earnings per share calculation																		$ 61,731	$ 64,252	$ 53,899
Income (Loss) from Continuing Operations, Per Basic Share																		$ 0.68	$ 0.73	$ 0.60
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share																		0.08	0.08	0.10
Earnings (Loss) Per Share, Basic		$ 0.17	[4]	$ 0.17	[4]	$ 0.20	[4]	$ 0.22	[4]	$ 0.14	[4]	$ 0.22	[4]	$ 0.26	[4]	$ 0.20	[4]	$ 0.76	$ 0.81	$ 0.70
Dilutive Securities, Effect on Basic Earnings Per Share																		$ 0	$ 0	$ 0
Net Income (Loss) from Continuing Operations Available to Common Stockholders, Diluted																		$ 55,338	$ 58,145	$ 46,443
Income (Loss) from Continuing Operations, Per Diluted Share																		$ 0.66	$ 0.72	$ 0.59
Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share																		0.08	0.07	0.09
Earnings/ (Loss) Per Share, Diluted		$ 0.17	[4]	$ 0.16	[4]	$ 0.20	[4]	$ 0.21	[4]	$ 0.13	[4]	$ 0.22	[4]	$ 0.25	[4]	$ 0.20	[4]	0.74	0.79	0.68
Common Stock, Dividends, Per Share, Cash Paid																		$ 0.36	$ 0.32	$ 0.24
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount																		1,000	1,000	1,000
Shares Excluded Due to Exercise Price Exceeding Average Price During Period																		548,000	829,000	1,399,000
Series B Preferred Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Preferred Stock Dividends and Other Adjustments																				$ (11,700)
Common Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Weighted Average Number of Shares Outstanding, Basic																		80,885,253	78,921,480	77,373,817
Incremental Common Shares Attributable to Share-based Payment Arrangements	[5]																	1,133,511	759,138	656,066
Incremental Common Shares Attributable to Call Options and Warrants	[5]																	1,206,389	1,198,613	723,641
Weighted Average Number Diluted Shares Outstanding Adjustment																		2,339,900	1,957,751	1,379,707
Weighted Average Number of Shares Outstanding, Diluted	[5]																	83,225,153	80,879,231	78,753,524
Convertible Debt Securities [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	[6]																	1,000	1,000	1,000
Stock Compensation Plan [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Shares Excluded Due to Exercise Price Exceeding Average Price During Period	[7]																	548,000	829,000	1,399,000
[1]	Due to rounding, the sum of the four quarters may not add to the year to date total.
[2]	See Part II. Item 8. “Financial Statements and Supplementary Data - Note 14: Noncontrolling Interests” for a description of the redemption values related to the redeemable noncontrolling interests. In accordance with ASC 480, Distinguishing Liabilities from Equity (“ASC 480”), an increase in redemption values from period to period reduces income attributable to common shareholders. Decreases in redemption value from period to period increase income attributable to common shareholders, but only to the extent that the cumulative change in redemption value remains a cumulative increase since adoption of this standard in the first quarter of 2009.
[3]	Consideration paid in excess of carrying value for the repurchase of the Series B preferred stock of $11.7 million is considered a deemed dividend and, for purposes of calculating EPS, reduces net income attributable to common shareholders for the year ended December 31, 2013.
[4]	Includes the effect of adjustments to net income attributable to the Company to arrive at net income attributable to common shareholders.
[5]	The diluted EPS computations for the years ended December 31, 2015, 2014, and 2013 do not assume the conversion, exercise or contingent issuance of the following shares for the following periods because the result would have been antidilutive for the periods indicated. As a result of the anti-dilution, the potential common shares excluded from the diluted EPS computation are as follows: For the year ended December 31, 2015 2014 2013Shares excluded due to anti-dilution (treasury method):(In thousands)Potential common shares from: Convertible trust preferred securities (a)1 1 1Total shares excluded due to anti-dilution1 1 1 For the year ended December 31, 2015 2014 2013Shares excluded due to exercise price exceeding the average market price of common shares during the period (total outstanding):(In thousands)Potential common shares from: Options, restricted stock, or other dilutive securities (b)548 829 1,399Total shares excluded due to exercise price exceeding the average market price of common shares during the period548 829 1,399(a) If the effect of the conversion of the trust preferred securities would have been dilutive, an immaterial amount of interest expense, net of tax, related to the convertible trust preferred securities would have been added back to net income attributable to common shareholders for the diluted EPS computation for the years presented.(b)Options to purchase shares of common stock, non-participating performance- and certain time-based restricted stock, and other dilutive securities that were outstanding at period ends were not included in the computation of diluted EPS or in the above anti-dilution table because their exercise or conversion prices were greater than the average market price of the common shares during the respective periods.
[6]	If the effect of the conversion of the trust preferred securities would have been dilutive, an immaterial amount of interest expense, net of tax, related to the convertible trust preferred securities would have been added back to net income attributable to common shareholders for the diluted EPS computation for the years presented.
[7]	Options to purchase shares of common stock, non-participating performance- and certain time-based restricted stock, and other dilutive securities that were outstanding at period ends were not included in the computation of diluted EPS or in the above anti-dilution table because their exercise or conversion prices were greater than the average market price of the common shares during the respective periods.

Income Taxes Components of Inco

Income Taxes Components of Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2015	[1]	Sep. 30, 2015	[1]	Jun. 30, 2015	[1]	Mar. 31, 2015	[1]	Dec. 31, 2014	[1]	Sep. 30, 2014	[1]	Jun. 30, 2014	[1]	Mar. 31, 2014	[1]	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Income Tax Expense Components [Line Items]
Deferred Income Tax Expense (Benefit) Continuing and Discontinued Operations																	$ (4,575)		$ 5,058		$ 10,313
Income Tax Expense (Benefit)	$ 5,638		$ 8,182		$ 8,000		$ 8,572		$ 5,901		$ 8,993		$ 10,333		$ 7,138		30,392	[2]	32,365	[2]	32,963	[2]
Income Tax Expense Components, Continuing Operations [Member]
Income Tax Expense Components [Line Items]
Current Federal Tax Expense (Benefit)																	25,631		20,557		17,758
Current State and Local Tax Expense (Benefit)																	9,183		7,254		6,622
Current Income Tax Expense (Benefit)																	34,814		27,811		24,380
Deferred Federal Income Tax Expense (Benefit)																	(3,185)		3,895		6,153
Deferred State and Local Income Tax Expense (Benefit)																	(1,237)		659		2,430
Deferred Income Tax Expense (Benefit) Continuing and Discontinued Operations																	(4,422)		4,554		8,583
Income Tax Expense (Benefit)																	$ 30,392		$ 32,365		$ 32,963
[1]	Due to rounding, the sum of the four quarters may not add to the year to date total.
[2]	The Company’s effective tax rate for 2015, 2014, and 2013 are not consistent due to earnings from tax-exempt investments, non-deductible compensation, state and local taxes, income tax credits and income attributable to noncontrolling interests having a different impact on the effective tax rate due primarily to the different levels of income before taxes in years 2015, 2014, and 2013. See Part II. Item 8. “Financial Statements and Supplementary Data - Note 17: Income Taxes” for additional details.

Income Taxes Income Tax Rate Re

Income Taxes Income Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Expense Components [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	35.00%	35.00%	35.00%
Effective Income Tax Rate Reconciliation, Tax Exempt Income	(7.10%)	(5.60%)	(5.00%)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes	5.50%	5.20%	5.90%
Effective Income Tax Rate Reconciliation, Tax Credits	(1.90%)	(1.70%)	(1.30%)
Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Expense)	(1.60%)	(1.70%)	(1.40%)
Effective Income Tax Rate Reconciliation,Other Reconciling Items, Percent	1.30%	0.00%	0.00%
Effective Income Tax Rate Reconciliation, Other Adjustments	1.40%	1.20%	(0.10%)
Effective Income Tax Rate, Continuing Operations	32.60%	32.40%	33.10%

Income Taxes Components of Defe

Income Taxes Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Abstract]
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Provision for Loan Losses	$ 37,401	$ 32,024
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Loss Reserves	912	875
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost	7,391	7,709
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation	19,370	17,438
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	60	103
Deferred Tax Assets, Capital Loss Carryforwards	458	469
Deferred Tax Assets, Investments	274	414
Deferred Tax Assets, Deferred Income	1,978	1,765
Deferred Tax Assets, Unrealized Losses on Available-for-Sale Securities, Gross	748	165
Deferred Tax Assets, Property, Plant and Equipment	0	688
Deferred Tax Assets, Other	1,589	1,149
Deferred Tax Assets, Gross	70,181	62,799
Deferred Tax Assets, Valuation Allowance	458	298
Deferred Tax Assets, Net of Valuation Allowance	69,723	62,501
Deferred Tax Liabilities, Tax Deferred Income	4,035	5,572
Deferred Tax Liabilities, Goodwill and Intangible Assets	11,894	7,989
Deferred Tax Liabilities, Property, Plant and Equipment	62	0
Deferred Tax Liabilities, Other	2,033	1,364
Deferred Tax Liabilities, Gross	18,024	14,925
Deferred Tax Assets, Net	$ 51,699	$ 47,576

Income Taxes Unrecognized Tax B

Income Taxes Unrecognized Tax Benefits Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits, beginning of year	$ 1,067	$ 549	$ 4,802
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions	163	245	143
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions	0	366	1,493
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions	0	0	(4,332)
Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities	0	0	(1,493)
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations	(208)	(93)	(64)
Unrecognized Tax Benefits, end of year	$ 1,022	$ 1,067	$ 549

Income Taxes Text Details (Deta

Income Taxes Text Details (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other Tax Carryforward [Line Items]
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount	$ 1,200
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent	5.50%	5.20%	5.90%
Increase (Decrease) in Deferred Income Taxes	$ (4,100)
Deferred income tax expense/(benefit)	4,575	$ (5,058)	$ (10,313)
Deferred Tax Liabilities, Tax Deferred Income	4,035	5,572
Other Tax Carryforward, Gross Amount	1,200
Deferred Tax Assets, Valuation Allowance	458	298
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	60	103
Operating Loss Carryforwards	1,500
Unrecognized Tax Benefits	1,022	1,067	549	$ 4,802
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	800	800	400
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	0	0	400
Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities	0	0	1,493
Effective Income Tax Rate Reconciliation, Tax Settlement, Amount			600
Deferred Tax Assets, Net	51,699	47,576
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions	0	0	4,332
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	0	0	0
Capital Loss Carryforward [Member]
Other Tax Carryforward [Line Items]
Other Tax Carryforward, Deferred Tax Asset	500
Deferred Tax Assets, Valuation Allowance	500	300
Valuation Allowance, Deferred Tax Asset, Change in Amount	200
Expiring in 2030 [Member]
Other Tax Carryforward [Line Items]
Operating Loss Carryforwards	100
Expiring in 2031 [Member]
Other Tax Carryforward [Line Items]
Operating Loss Carryforwards	100
Expiring in 2032 [Member]
Other Tax Carryforward [Line Items]
Operating Loss Carryforwards	1,300
Shareholders' Equity [Member]
Other Tax Carryforward [Line Items]
Increase (Decrease) in Deferred Income Taxes	400
Income Tax Expense Components, Continuing Operations [Member]
Other Tax Carryforward [Line Items]
Deferred income tax expense/(benefit)	4,422	(4,554)	$ (8,583)
Discontinued Operations [Member]
Other Tax Carryforward [Line Items]
Deferred income tax expense/(benefit)	100
State and Local Jurisdiction [Member]
Other Tax Carryforward [Line Items]
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount	200
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	$ 500	$ 500
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent		7.10%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent		6.50%

Employee Benefits 401(k) Plan (

Employee Benefits 401(k) Plan (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
EMPLOYEE BENEFITS [Abstract]
Defined Contribution Plan, Cost Recognized	$ 2.8	$ 2.4	$ 2.4

Employee Benefits Salary Contin

Employee Benefits Salary Continuation Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
San Francisco Salary Continuation Plan [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Postemployment Benefits, Period Expense	$ 0.1	$ 0.1	$ 0.1
Postemployment Benefits Liability	1.3	1.6
Cash Surrender Value of Life Insurance	6.2	6
Southern California Salary Continuation Plan [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Postemployment Benefits, Period Expense	0.1	0.2	$ 0.2
Postemployment Benefits Liability	2	2.1
Cash Surrender Value of Life Insurance	$ 4.7	$ 4.6

Employee Benefits Deferred Comp

Employee Benefits Deferred Compensation Plan (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Deferred Compensation Liability, Current and Noncurrent	$ 5.6	$ 6.3
Deferred Compensation Arrangement with Individual, Compensation Expense	(0.1)	0.6	$ 0.9
Deferred Compensation Plan Assets	5.6	5.4
Deferred Compensation Plan Assets, Income	$ (0.1)	$ 0.6	$ 1

Employee Benefits Stock Based I

Employee Benefits Stock Based Incentive Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock or Unit Option Plan Expense	$ 518	$ 653	$ 987
Restricted Stock or Unit Expense	5,723	5,339	4,747
Allocated Share-based Compensation Expense	6,241	5,992	5,734
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	2,367	2,311	2,210
Allocated Share-based Compensation Expense, Net of Tax	$ 3,874	$ 3,681	$ 3,524
Employee Stock Purchase Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award	Under the ESPPs, eligible employees may purchase common stock of the Company at 85 percent of the lower of the closing price of the Company’s common stock on the first or last day of a six month purchase period on The NASDAQ® Global Select Market. Employees pay for their stock purchases through payroll deductions at a rate equal to any whole percentage from 1 percent to 15 percent of after-tax earnings.
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period	138,463
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	943,645
2010 Inducement Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	1,245,000
Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award	The terms of the Inducement Plan are substantially similar to the terms of the 2009 Plan.
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period	22,936	637,804	30,887
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	164,687
2009 Stock Option and Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	4,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	2,674,252
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0	0	0
Stock Options [Member] | 2009 Stock Option and Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0
Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award	Generally, options expire ten years from the date granted and vest over a three-year graded vesting period for officers and employees and a one-year or less period for non-employee directors.
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	2,236,383	2,542,035
Restricted Stock [Member] | 2009 Stock Option and Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award	Stock grants generally vest over a three-year cliff vesting period
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	848,700
Potential performance shares, incremental expense	$ 7,800
Potential Incremental Performance Shares Outstanding	678,960
Maximum [Member] | Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	1,527,660

Employee Benefits Stock Options

Employee Benefits Stock Options Shares Rollforward (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	2 years 6 months 6 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	$ 2,520,100
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	2 years 6 months 6 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 2,520,100
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Beginning of Period	1,634,302
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	159,219
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period	2,852
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period	249,280
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number End of Period	1,222,951	1,634,302
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Beginning of Period	$ 17.10
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	0
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	8.16
Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price	9.05
Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price	26.98
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price End of Period	$ 16.27	$ 17.10
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	1,222,951
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price	$ 16.27
2009 Stock Option and Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value	$ 700,000	$ 1,100,000	$ 800,000
2009 Stock Option and Incentive Plan [Member] | Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options	$ 0

Employee Benefits Restricted St

Employee Benefits Restricted Stock Share Rollforward (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms	1 year 11 months 22 days
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Beginning of Period	2,542,035
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	738,025
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	614,285
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	429,392
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number End of Period	2,236,383	2,542,035
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Beginning of Period	$ 10.76
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	12.41	$ 12.42	$ 9.79
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value	8.68
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	11.53
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value End of Period	$ 11.72	$ 10.76
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	$ 12
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value	$ 5.3	$ 5.1	$ 6.1

Employee Benefits Supplemental

Employee Benefits Supplemental Executive Retirement Plans and Long Term Incentive Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Deferred Compensation Arrangement with Individual, Compensation Expense	$ (0.1)	$ 0.6	$ 0.9
Holding Company SERP [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Benefit Obligation	8.3	8.4
Defined Benefit Plan, Net Periodic Benefit Cost	$ 0.5	$ 1	$ 1.4
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.35%	3.85%	4.65%
Pacific Northwest SERP [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Benefit Obligation	$ 3.2	$ 2.8
Defined Benefit Plan, Net Periodic Benefit Cost	$ 0.2	$ 0.2	$ 0.1
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.81%	3.45%	4.25%
KLS LTIP [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Benefit Obligation	$ 7.9	$ 7.4
Deferred Compensation Arrangement with Individual, Compensation Expense	$ 1.3	$ 1.9	$ 1.7
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.90%	3.80%	4.25%

Other Operating Expense (Detail

Other Operating Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
other operating expense components [Line Items]
General Insurance Expense	$ 3,518	$ 2,851	$ 3,065
Travel and Entertainment Expense	2,874	2,250	2,396
Other Banking Expense	1,788	1,091	1,139
Communication	1,661	1,589	1,338
Supplies Expense	1,241	838	997
Postage Expense	1,007	978	1,059
Publications and Dues expense	870	795	727
Employee Training and Education Expense	686	554	372
Foreclosed Real Estate Expense	197	176	363
Litigation Settlement, Expense	150	48	500
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Repayment and Penalties	0	808	1,781
Valuation Allowances and Reserves, Deductions	(271)	50	290
Other Cost and Expense, Operating	2,501	2,100	3,038
Other Noninterest Expense	$ 16,222	$ 14,128	$ 17,065

Reportable Segments (Details)

Reportable Segments (Details) - USD ($) $ in Thousands		3 Months Ended																12 Months Ended
		Dec. 31, 2015		Sep. 30, 2015	[1]	Jun. 30, 2015	[1]	Mar. 31, 2015	[1]	Dec. 31, 2014		Sep. 30, 2014	[1]	Jun. 30, 2014	[1]	Mar. 31, 2014	[1]	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Segment Reporting Information [Line Items]
Interest Income (Expense), Net		$ 48,140	[1]	$ 46,473		$ 45,085		$ 46,072		$ 44,128	[1]	$ 44,783		$ 46,268		$ 44,522		$ 185,770		$ 179,701		$ 174,018
Noninterest Income		37,718	[1]	39,446		42,660		41,345		39,922	[1]	33,769		34,374		32,733		161,169		140,798		136,341
Revenues																		346,939		320,499		310,359
Provision/ (credit) for loan losses		(1,655)	[1]	2,600		0		(2,500)		2,400	[1]	(2,600)		(5,000)		(1,200)		(1,555)		(6,400)		(10,000)
Noninterest Expense		67,407	[1]	61,929		62,418		63,427		63,760	[1]	53,999		54,402		54,968		255,181		227,129		220,705
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest		20,106	[1]	21,390		25,327		26,490		17,890	[1]	27,153		31,240		23,487		93,313		99,770		99,654
Income tax expense		5,638	[1]	8,182		8,000		8,572		5,901	[1]	8,993		10,333		7,138		30,392	[2]	32,365	[2]	32,963	[2]
Net income from continuing operations																		62,921		67,405		66,691
Net Income (Loss) Attributable to Noncontrolling Interest		921	[1]	994		1,263		1,229		1,322	[1]	1,167		1,025		1,236		4,407		4,750		3,948
Income from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest		1,455	[1]	1,316		1,546		2,094		1,510	[1]	1,272		1,450		1,928		6,411		6,160		7,792
Net income attributable to the Company		15,002	[1]	$ 13,530		$ 17,610		$ 18,783		12,177	[1]	$ 18,265		$ 21,332		$ 17,041		64,925		68,815		70,535
Assets		7,542,508								6,797,874								7,542,508		6,797,874		6,437,109
Assets under Management, Carrying Amount		27,595,000								29,907,000								27,595,000		29,907,000		24,280,000
Amortization of Intangible Assets																		6,711		4,836		4,327
Depreciation																		6,590		6,468		6,235
Gain on sale of Pacific Northwest offices																		0		0		10,574
Restructuring expense																		3,724		739		0
Private Banking Segment [Member]
Segment Reporting Information [Line Items]
Interest Income (Expense), Net																		189,501		183,424		178,199
Noninterest Income																		11,352		10,617		22,454	[3]
Revenues																		200,853		194,041		200,653
Provision/ (credit) for loan losses																		(1,555)		(6,400)		(10,000)
Noninterest Expense																		116,575		111,901		118,488
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest																		85,833		88,540		92,165
Income tax expense	[2]																	27,844		29,032		30,958
Net income from continuing operations																		57,989		59,508		61,207
Net income attributable to the Company																		57,989		59,508		61,207
Assets		7,361,202								6,611,191								7,361,202		6,611,191		6,246,148
Amortization of Intangible Assets																		341		219		277
Depreciation																		4,599		5,294		5,350
Wealth Management and Trust Segment [Member] [Member]
Segment Reporting Information [Line Items]
Noninterest Income																		53,336		34,584		26,547
Revenues																		53,336		34,584		26,547
Noninterest Expense	[4]																	54,474		29,401		20,733
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest																		(1,138)		5,183		5,814
Income tax expense	[2]																	(350)		2,201		2,392
Net income from continuing operations																		(788)		2,982		3,422
Net income attributable to the Company																		(788)		2,982		3,422
Assets		80,088								80,467								80,088		80,467		4,939
Assets under Management, Carrying Amount		7,976,000								9,274,000								7,976,000		9,274,000		4,565,000
Amortization of Intangible Assets																		2,428		676		0
Depreciation																		772		241		105
Investment Managers Segment [Member]
Segment Reporting Information [Line Items]
Interest Income (Expense), Net																		22		22		20
Noninterest Income																		45,687		47,119		43,875
Revenues																		45,709		47,141		43,895
Noninterest Expense																		33,690		34,848		33,195
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest																		12,019		12,293		10,700
Income tax expense	[2]																	3,956		4,078		3,493
Net income from continuing operations																		8,063		8,215		7,207
Net Income (Loss) Attributable to Noncontrolling Interest																		2,265		2,519		2,164
Net income attributable to the Company																		5,798		5,696		5,043
Assets		92,642								100,229								92,642		100,229		100,609
Assets under Management, Carrying Amount		9,952,000								10,772,000								9,952,000		10,772,000		10,401,000
Amortization of Intangible Assets																		2,956		2,955		3,058
Depreciation																		286		240		221
Wealth Advisors Segment [Member]
Segment Reporting Information [Line Items]
Interest Income (Expense), Net																		6		10		66
Noninterest Income																		50,558		48,199		42,350
Revenues																		50,564		48,209		42,416
Noninterest Expense																		35,379		33,213		29,588
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest																		15,185		14,996		12,828
Income tax expense	[2]																	5,819		5,653		4,807
Net income from continuing operations																		9,366		9,343		8,021
Net Income (Loss) Attributable to Noncontrolling Interest																		2,138		2,189		1,784
Net income attributable to the Company																		7,228		7,154		6,237
Assets		79,543								80,804								79,543		80,804		73,972
Assets under Management, Carrying Amount		9,688,000								9,883,000								9,688,000		9,883,000		9,336,000
Amortization of Intangible Assets																		986		986		992
Depreciation																		864		488		363
Holding Company and Eliminations Segment [Member]
Segment Reporting Information [Line Items]
Interest Income (Expense), Net																		(3,759)		(3,755)		(4,267)
Noninterest Income																		236		279		1,115
Revenues																		(3,523)		(3,476)		(3,152)
Noninterest Expense																		15,063		17,766		18,701
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest																		(18,586)		(21,242)		(21,853)
Income tax expense	[2]																	(6,877)		(8,599)		(8,687)
Net income from continuing operations																		(11,709)		(12,643)		(13,166)
Net Income (Loss) Attributable to Noncontrolling Interest																		4		42		0
Income from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	[5]																	6,411		6,160		7,792
Net income attributable to the Company																		(5,302)		(6,525)		(5,374)
Assets		(70,967)								(74,817)								(70,967)		(74,817)		11,441
Assets under Management, Carrying Amount		$ (21,000)								$ (22,000)								(21,000)		(22,000)		(22,000)
Depreciation																		$ 69		$ 205		$ 196
[1]	Due to rounding, the sum of the four quarters may not add to the year to date total.
[2]	The Company’s effective tax rate for 2015, 2014, and 2013 are not consistent due to earnings from tax-exempt investments, non-deductible compensation, state and local taxes, income tax credits and income attributable to noncontrolling interests having a different impact on the effective tax rate due primarily to the different levels of income before taxes in years 2015, 2014, and 2013. See Part II. Item 8. “Financial Statements and Supplementary Data - Note 17: Income Taxes” for additional details.
[3]	Included in Private Banking non-interest income for the year ended December 31, 2013 is the $10.6 million gain on sale of the Bank’s three offices in the Pacific Northwest
[4]	Operating expense for 2015 includes $3.7 million in restructuring expenses related to the Wealth Management and Trust segment. Operating expense for 2014 includes $0.7 million restructuring expenses. Operating expense for 2013 includes no restructuring expenses
[5]	Net income from discontinued operations for the years ended December 31, 2015, 2014 and 2013 of $6.4 million, $6.2 million, and $7.8 million, respectively, are included in Holding Company and Eliminations in the calculation of net income attributable to the Company.

Reportable Segments Segments Te

Reportable Segments Segments Text Disclosures (Details) $ in Thousands

3 Months Ended

12 Months Ended

Dec. 31, 2015USD ($)

[1]

Sep. 30, 2015USD ($)

[1]

Jun. 30, 2015USD ($)

[1]

Mar. 31, 2015USD ($)

[1]

Dec. 31, 2014USD ($)

[1]

Sep. 30, 2014USD ($)

[1]

Jun. 30, 2014USD ($)

[1]

Mar. 31, 2014USD ($)

[1]

Dec. 31, 2015USD ($)segments

Dec. 31, 2014USD ($)

Dec. 31, 2013USD ($)

Segment Reporting Information [Line Items]

Number of Reportable Segments | segments

4

Gain on sale of Pacific Northwest offices

$ 0

$ 0

$ 10,574

Restructuring expense

3,724

739

0

Income from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest

$ 1,455

$ 1,316

$ 1,546

$ 2,094

$ 1,510

$ 1,272

$ 1,450

$ 1,928

6,411

6,160

7,792

Holding Company and Eliminations Segment [Member]

Segment Reporting Information [Line Items]

Income from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest

[2]

$ 6,411

$ 6,160

$ 7,792

[1]

Due to rounding, the sum of the four quarters may not add to the year to date total.

[2]

Net income from discontinued operations for the years ended December 31, 2015, 2014 and 2013 of $6.4 million, $6.2 million, and $7.8 million, respectively, are included in Holding Company and Eliminations in the calculation of net income attributable to the Company.

Fair Value Measurements Fair Va

Fair Value Measurements Fair Value Recurring Basis (Details) - USD ($) $ in Thousands		Dec. 31, 2015		Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		$ 1,084,510		$ 829,993
US Government and Government Agencies and Authorities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		21,251	[1]	16,882
US Government-sponsored Enterprises Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		344,562	[1]	274,253
Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		268,644	[1]	235,248
Mortgage Backed Securities, Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	[2]	427,041	[3]	283,704
Other Aggregated Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		23,012	[4]	19,906
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		0		0
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		1,084,510		829,993
Alternative Investments, Fair Value Disclosure		5,602		5,437
Financial and Nonfinancial Liabilities, Fair Value Disclosure		5,602
Fair Value, Measurements, Recurring [Member] | US Government and Government Agencies and Authorities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		21,251		16,882
Fair Value, Measurements, Recurring [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		344,562		274,253
Fair Value, Measurements, Recurring [Member] | Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		268,644		235,248
Fair Value, Measurements, Recurring [Member] | Mortgage Backed Securities, Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		427,041		283,704
Fair Value, Measurements, Recurring [Member] | Other Aggregated Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		23,012		19,906
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		43,263		35,283
Alternative Investments, Fair Value Disclosure		5,602		5,437
Financial and Nonfinancial Liabilities, Fair Value Disclosure		5,602
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | US Government and Government Agencies and Authorities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		20,251		15,377
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Mortgage Backed Securities, Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other Aggregated Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		23,012		19,906
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		1,041,247		794,710
Alternative Investments, Fair Value Disclosure		0		0
Financial and Nonfinancial Liabilities, Fair Value Disclosure		0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US Government and Government Agencies and Authorities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		1,000		1,505
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		344,562		274,253
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		268,644		235,248
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Mortgage Backed Securities, Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		427,041		283,704
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other Aggregated Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
Alternative Investments, Fair Value Disclosure		0		0
Financial and Nonfinancial Liabilities, Fair Value Disclosure		0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | US Government and Government Agencies and Authorities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Mortgage Backed Securities, Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other Aggregated Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
Fair Value, Measurements, Recurring [Member] | Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets		7,960		5,323
Derivative Financial Instruments, Liabilities, Fair Value Disclosure		8,084		5,434
Fair Value, Measurements, Recurring [Member] | Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets		0		0
Derivative Financial Instruments, Liabilities, Fair Value Disclosure		0		0
Fair Value, Measurements, Recurring [Member] | Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets		7,960		5,323
Derivative Financial Instruments, Liabilities, Fair Value Disclosure		8,084		5,434
Fair Value, Measurements, Recurring [Member] | Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets		0		0
Derivative Financial Instruments, Liabilities, Fair Value Disclosure		0		0
Fair Value, Measurements, Recurring [Member] | Not Designated as Hedging Instrument [Member] | Loan Participations and Assignments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure		11
Fair Value, Measurements, Recurring [Member] | Not Designated as Hedging Instrument [Member] | Loan Participations and Assignments [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure		0
Fair Value, Measurements, Recurring [Member] | Not Designated as Hedging Instrument [Member] | Loan Participations and Assignments [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure		11
Fair Value, Measurements, Recurring [Member] | Not Designated as Hedging Instrument [Member] | Loan Participations and Assignments [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure		0
Fair Value, Measurements, Recurring [Member] | Designated as Hedging Instrument [Member] | Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure				1,768
Fair Value, Measurements, Recurring [Member] | Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure				0
Fair Value, Measurements, Recurring [Member] | Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure				1,768
Fair Value, Measurements, Recurring [Member] | Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure				0
Fair Value, Measurements, Recurring [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets				34
Derivative Financial Instruments, Liabilities, Fair Value Disclosure		1,907		1,584
Fair Value, Measurements, Recurring [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets				0
Derivative Financial Instruments, Liabilities, Fair Value Disclosure		0		0
Fair Value, Measurements, Recurring [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets				34
Derivative Financial Instruments, Liabilities, Fair Value Disclosure		1,907		1,584
Fair Value, Measurements, Recurring [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets				0
Derivative Financial Instruments, Liabilities, Fair Value Disclosure		$ 0		$ 0
[1]	Certain securities are callable before their final maturity.
[2]	All mortgage-backed securities are guaranteed by U.S. government agencies or Government-sponsored entities.
[3]	Mortgage-backed securities are shown based on their final (contractual) maturity, but, due to prepayments, they are expected to have shorter lives.
[4]	Other securities consist of money market mutual funds and equity securities held at certain Wealth Advisory and Investment Management businesses.

Fair Value Measurements Fair131

Fair Value Measurements Fair Value Nonrecurring Basis (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015		Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	$ 2,322	[1]	$ 10,094	[2]
Loans Receivable, Fair Value Adjustment	(514)	[1]	(3,925)	[2]
Assets, Fair Value Disclosure	2,322		10,094
Assets, Fair Value Adjustment	(514)		(3,925)
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	0	[1]	0	[2]
Assets, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	0	[1]	0	[2]
Assets, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	2,322	[1]	10,094	[2]
Assets, Fair Value Disclosure	$ 2,322		$ 10,094
[1]	Collateral-dependent impaired loans held at December 31, 2015 that had write-downs in fair value or whose specific reserve changed during 2015.
[2]	Collateral-dependent impaired loans held at December 31, 2014 that had write-downs in fair value or whose specific reserve changed during 2014.

Fair Value Measurements Quantit

Fair Value Measurements Quantitative Information about Level 3 Nonrecurring Assets (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015		Dec. 31, 2014
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loans Receivable, Fair Value Disclosure	$ 2,322	[1]	$ 10,094	[2]
Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loans Receivable, Fair Value Disclosure	$ 2,322	[1]	$ 10,094	[2]
Loans Receivable [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	7.00%		0.00%
Fair Value Inputs, Comparability Adjustments	20.00%		0.00%
Loans Receivable [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	12.00%		3.00%
Fair Value Inputs, Comparability Adjustments	21.00%		2.00%
Loans Receivable [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	24.00%		10.00%
Fair Value Inputs, Comparability Adjustments	25.00%		25.00%
Substandard [Member] | Market Approach Valuation Technique [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loans Receivable, Fair Value Disclosure	$ 2,322		$ 10,094
[1]	Collateral-dependent impaired loans held at December 31, 2015 that had write-downs in fair value or whose specific reserve changed during 2015.
[2]	Collateral-dependent impaired loans held at December 31, 2014 that had write-downs in fair value or whose specific reserve changed during 2014.

Fair Value Measurements Not Mea

Fair Value Measurements Not Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value	$ 116,384	$ 142,339
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	238,694	172,609
Held-to-maturity Securities, Fair Value	116,352	140,727
Loans Held-for-sale, Fair Value Disclosure	8,072	7,099
Loans Receivable, Fair Value Disclosure	5,640,712	5,194,098
Other Assets, Fair Value Disclosure	118,233	114,686
Deposits, Fair Value Disclosure	6,040,437	5,453,879
Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure	58,215	30,496
Federal Home Loan Bank Borrowings, Fair Value Disclosure	461,324	370,150
Subordinated Debt Obligations, Fair Value Disclosure	106,363	106,363
Other Liabilities, Fair Value Disclosure	1,978	7,357
Portion at Fair Value, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	238,694	172,609
Held-to-maturity Securities, Fair Value	116,384	142,339
Loans Held-for-sale, Fair Value Disclosure	8,144	7,239
Loans Receivable, Fair Value Disclosure	5,658,254	5,130,843
Other Assets, Fair Value Disclosure	118,233	114,686
Deposits, Fair Value Disclosure	6,041,239	5,457,117
Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure	58,215	30,493
Federal Home Loan Bank Borrowings, Fair Value Disclosure	465,100	376,320
Subordinated Debt Obligations, Fair Value Disclosure	96,363	96,363
Other Liabilities, Fair Value Disclosure	1,978	7,357
Portion at Fair Value, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	238,694	172,609
Held-to-maturity Securities, Fair Value	0	0
Loans Held-for-sale, Fair Value Disclosure	0	0
Loans Receivable, Fair Value Disclosure	0	0
Other Assets, Fair Value Disclosure	0	0
Deposits, Fair Value Disclosure	0	0
Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure	0	0
Federal Home Loan Bank Borrowings, Fair Value Disclosure	0	0
Subordinated Debt Obligations, Fair Value Disclosure	0	0
Other Liabilities, Fair Value Disclosure	0	0
Portion at Fair Value, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Held-to-maturity Securities, Fair Value	116,384	142,339
Loans Held-for-sale, Fair Value Disclosure	8,144	7,239
Loans Receivable, Fair Value Disclosure	0	0
Other Assets, Fair Value Disclosure	118,233	114,686
Deposits, Fair Value Disclosure	6,041,239	5,457,117
Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure	58,215	30,493
Federal Home Loan Bank Borrowings, Fair Value Disclosure	465,100	376,320
Subordinated Debt Obligations, Fair Value Disclosure	0	0
Other Liabilities, Fair Value Disclosure	1,978	7,357
Portion at Fair Value, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Held-to-maturity Securities, Fair Value	0	0
Loans Held-for-sale, Fair Value Disclosure	0	0
Loans Receivable, Fair Value Disclosure	5,658,254	5,130,843
Other Assets, Fair Value Disclosure	0	0
Deposits, Fair Value Disclosure	0	0
Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure	0	0
Federal Home Loan Bank Borrowings, Fair Value Disclosure	0	0
Subordinated Debt Obligations, Fair Value Disclosure	96,363	96,363
Other Liabilities, Fair Value Disclosure	$ 0	$ 0

Financial Instruments With O134

Financial Instruments With Off-Balance Sheet Risk (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Variable Rate Commitments [Member]
Supply Commitment [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Asset	$ 87,622	$ 133,965
Interest Rate Lock Commitments [Member]
Supply Commitment [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Asset	17,096	31,757
Loan Origination Commitments [Member]
Supply Commitment [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Asset	104,718	165,722
Unused lines of Credit [Member]
Supply Commitment [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Asset	1,181,114	1,092,838
Commitments to Extend Credit [Member]
Supply Commitment [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Asset	39,245	33,685
Forward Contracts [Member]
Supply Commitment [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Asset	$ 28,468	$ 18,977

Boston Private Financial Hol135

Boston Private Financial Holdings, Inc. (Parent Company Only) Balance Sheet (Details) - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents		$ 238,694	$ 172,609	$ 191,881	$ 308,744
Deferred income taxes, net		69,723	62,501
Other assets		121,179	119,975
Assets		7,542,508	6,797,874	6,437,109
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust		106,363	106,363
Other liabilities		111,468	112,170
Total liabilities		6,777,807	6,073,058
Stockholders' Equity Attributable to Noncontrolling Interest		21,481	21,291
Stockholders' Equity Attributable to Parent		743,220	703,525
Total liabilities, redeemable noncontrolling interests and shareholders’ equity		7,542,508	6,797,874
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents		55,385	44,593	$ 32,554	$ 61,221
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures		6,340	6,340
Deferred income taxes, net		1,460	0
Other assets		14,243	17,061
Assets		886,810	846,353
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust		106,363	106,363
Other liabilities		15,746	15,174
Total liabilities		122,109	121,537
Stockholders' Equity Attributable to Noncontrolling Interest	[1]	21,481	21,291
Stockholders' Equity Attributable to Parent		743,220	703,525
Total liabilities, redeemable noncontrolling interests and shareholders’ equity		886,810	846,353
Parent Company [Member] | Private Banking Segment [Member]
Condensed Financial Statements, Captions [Line Items]
Investments in and Advances to Affiliates, Balance, Principal Amount		671,204	633,905
Parent Company [Member] | Non Banking Segments [Member]
Condensed Financial Statements, Captions [Line Items]
Investments in and Advances to Affiliates, Balance, Principal Amount		$ 138,178	$ 144,454
[1]	Includes noncontrolling interests and the maximum redemption value of redeemable noncontrolling interests.

Boston Private Financial Hol136

Boston Private Financial Holdings, Inc. (Parent Company Only) Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2015	[1]	Sep. 30, 2015	[1]	Jun. 30, 2015	[1]	Mar. 31, 2015	[1]	Dec. 31, 2014	[1]	Sep. 30, 2014	[1]	Jun. 30, 2014	[1]	Mar. 31, 2014	[1]	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Gain on repurchase of debt																	$ 0		$ 0		$ 620
Noninterest Income, Other Operating Income																	3,722		870		2,414
Revenues																	346,939		320,499		310,359
Salaries and employee benefits																	159,401		146,648		140,761
Professional services																	12,861		12,473		12,109
Interest Expense, Junior Subordinated Debentures																	3,875		3,872		4,408
Other																	16,222		14,128		17,065
Income before income taxes	$ 20,106		$ 21,390		$ 25,327		$ 26,490		$ 17,890		$ 27,153		$ 31,240		$ 23,487		93,313		99,770		99,654
Income tax benefit	5,638		8,182		8,000		8,572		5,901		8,993		10,333		7,138		30,392	[2]	32,365	[2]	32,963	[2]
Income from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	1,455		1,316		1,546		2,094		1,510		1,272		1,450		1,928		6,411		6,160		7,792
Net income attributable to the Company	$ 15,002		$ 13,530		$ 17,610		$ 18,783		$ 12,177		$ 18,265		$ 21,332		$ 17,041		64,925		68,815		70,535
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Interest Income, Operating																	116		115		140
Gain on repurchase of debt																	0		0		620
Noninterest Income, Other Operating Income																	236		279		496
Revenues																	51,841		47,250		53,201
Salaries and employee benefits																	10,320		11,876		11,888
Professional services																	2,007		2,965		3,064
Interest Expense, Junior Subordinated Debentures																	3,875		3,872		4,408
Other																	2,740		2,966		3,749
Operating Expenses																	18,942		21,679		23,109
Income before income taxes																	32,899		25,571		30,092
Income tax benefit																	(6,877)		(8,599)		(8,688)
Income from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest																	6,411		6,160		7,792
Net income attributable to the Company																	46,187		40,330		46,572
Parent Company [Member] | Private Banking Segment [Member]
Condensed Financial Statements, Captions [Line Items]
Cash Dividends Paid to Parent Company by Consolidated Subsidiaries																	22,700		26,500		27,900
Net income attributable to the Company																	(57,201)		(62,491)		(64,628)
Parent Company [Member] | Non Banking Segments [Member]
Condensed Financial Statements, Captions [Line Items]
Cash Dividends Paid to Parent Company by Consolidated Subsidiaries																	28,789		20,356		24,045
Net income attributable to the Company																	(13,026)		(12,850)		(11,280)
Private Banking, Wealth Management and Trust, Investment Management, and Wealth Advisory Segments [Member] | Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net income attributable to the Company																	$ 18,738		$ 28,485		$ 23,963
[1]	Due to rounding, the sum of the four quarters may not add to the year to date total.
[2]	The Company’s effective tax rate for 2015, 2014, and 2013 are not consistent due to earnings from tax-exempt investments, non-deductible compensation, state and local taxes, income tax credits and income attributable to noncontrolling interests having a different impact on the effective tax rate due primarily to the different levels of income before taxes in years 2015, 2014, and 2013. See Part II. Item 8. “Financial Statements and Supplementary Data - Note 17: Income Taxes” for additional details.

Boston Private Financial Hol137

Boston Private Financial Holdings, Inc. (Parent Company Only) Cash Flow (Details) - USD ($) $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2015		Sep. 30, 2015	[1]	Jun. 30, 2015	[1]	Mar. 31, 2015		Dec. 31, 2014		Sep. 30, 2014	[1]	Jun. 30, 2014	[1]	Mar. 31, 2014		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net Income Attributable to Parent	$ 15,002	[1]	$ 13,530		$ 17,610		$ 18,783	[1]	$ 12,177	[1]	$ 18,265		$ 21,332		$ 17,041	[1]	$ 64,925	$ 68,815	$ 70,535
Net income from discontinued operations	1,455	[1]	$ 1,316		$ 1,546		2,094	[1]	1,510	[1]	$ 1,272		$ 1,450		1,928	[1]	6,411	6,160	7,792
Net income from continuing operations																	62,921	67,405	66,691
Gain on repurchase of debt																	0	0	(620)
Deferred income tax expense/(benefit)																	(4,575)	5,058	10,313
Depreciation and amortization																	22,187	19,378	19,107
Net decrease/(increase) in other operating activities																	2,852	14,387	5,861
Net Cash Provided by (Used in) Operating Activities, Continuing Operations																	87,477	100,899	106,383
Cash Provided by (Used in) Operating Activities, Discontinued Operations																	6,411	6,160	7,792
Net Cash Provided by (Used in) Operating Activities																	93,888	107,059	114,175
Payments for (Proceeds from) Other Investing Activities																	0	1,601	224
Net Cash Provided by (Used in) Investing Activities, Continuing Operations																	(694,790)	(368,228)	(295,908)
Net cash provided by/(used in) investing activities - discontinued operations																	0	0	0
Net Cash Provided by (Used in) Investing Activities																	(694,790)	(368,228)	(295,908)
Repurchase of debt																	0	0	(35,536)
Proceeds from issuance of Series D preferred stock, net																	0	0	47,753
Repurchase of Series B preferred stock, including deemed dividend at repurchase																	0	0	(69,827)
Dividends paid to common share holders																	(29,608)	(25,829)	(19,129)
Dividends paid to preferred shareholders																	(3,475)	(3,475)	(2,660)
Tax savings/ (deficiency) from certain stock compensation awards																	(1,262)	1,294	(663)
Proceeds from stock option exercises																	1,206	1,807	2,332
Proceeds from issuance of common stock, net																	(515)	(353)	1,230
Other equity adjustments																	(199)	(1,669)	238
Net Cash Provided by (Used in) Financing Activities, Continuing Operations																	666,987	241,897	64,870
Net cash provided by/(used in) financing activities - discontinued operations																	0	0	0
Net Cash Provided by (Used in) Financing Activities																	666,987	241,897	64,870
Cash and Cash Equivalents, Period Increase (Decrease)																	66,085	(19,272)	(116,863)
Cash and cash equivalents at beginning of year							172,609								191,881		172,609	191,881	308,744
Cash and cash equivalents at end of period	238,694								172,609								238,694	172,609	191,881
Parent Company [Member]
Net Income Attributable to Parent																	46,187	40,330	46,572
Net income from discontinued operations																	6,411	6,160	7,792
Net income from continuing operations																	58,514	62,655	62,743
Gain on repurchase of debt																	0	0	(620)
Deferred income tax expense/(benefit)																	(4,575)	4,642	4,873
Depreciation and amortization																	5,097	1,743	3,187
Net decrease/(increase) in other operating activities																	2,167	(2,834)	(6,630)
Net Cash Provided by (Used in) Operating Activities, Continuing Operations																	42,465	37,721	39,590
Cash Provided by (Used in) Operating Activities, Discontinued Operations																	6,411	6,160	7,792
Net Cash Provided by (Used in) Operating Activities																	48,876	43,881	47,382
Payments to Acquire Businesses, Net of Cash Acquired																	1,821	0	0
Proceeds from Divestiture of Businesses																	0	0	747
Payments for (Proceeds from) Other Investing Activities																	1	(98)	(115)
Net Cash Provided by (Used in) Investing Activities, Continuing Operations																	99	(30,602)	276
Net cash provided by/(used in) investing activities - discontinued operations																	0	0	0
Net Cash Provided by (Used in) Investing Activities																	99	(30,602)	276
Repurchase of debt																	0	0	(35,536)
Proceeds from issuance of Series D preferred stock, net																	0	0	47,753
Repurchase of Series B preferred stock, including deemed dividend at repurchase																	0	0	(69,827)
Dividends paid to common share holders																	(29,608)	(25,829)	(19,129)
Dividends paid to preferred shareholders																	(3,475)	(3,475)	(2,660)
Tax savings/ (deficiency) from certain stock compensation awards																	(1,262)	1,294	(663)
Proceeds from stock option exercises																	1,206	1,807	2,332
Proceeds from issuance of common stock, net																	160	32,387	4,583
Other equity adjustments																	(5,204)	(7,424)	(3,178)
Net Cash Provided by (Used in) Financing Activities, Continuing Operations																	(38,183)	(1,240)	(76,325)
Net cash provided by/(used in) financing activities - discontinued operations																	0	0	0
Net Cash Provided by (Used in) Financing Activities																	(38,183)	(1,240)	(76,325)
Cash and Cash Equivalents, Period Increase (Decrease)																	10,792	12,039	(28,667)
Cash and cash equivalents at beginning of year							$ 44,593								$ 32,554		44,593	32,554	61,221
Cash and cash equivalents at end of period	$ 55,385								$ 44,593								55,385	44,593	32,554
Private Banking Segment [Member] | Parent Company [Member]
Net Income Attributable to Parent																	(57,201)	(62,491)	(64,628)
Cash Dividends Paid to Parent Company by Consolidated Subsidiaries																	22,700	26,500	27,900
Non Banking Segments [Member] | Parent Company [Member]
Net Income Attributable to Parent																	(13,026)	(12,850)	(11,280)
Cash Dividends Paid to Parent Company by Consolidated Subsidiaries																	28,789	20,356	24,045
Private Banking Segment [Member]
Net Income Attributable to Parent																	57,989	59,508	61,207
Net income from continuing operations																	57,989	59,508	61,207
Private Banking Segment [Member] | Parent Company [Member]
Payments of Distributions to Affiliates																	0	(29,007)	0
Non Banking Segments [Member] | Parent Company [Member]
Payments of Distributions to Affiliates																	$ (1,723)	$ (1,497)	$ (356)
[1]	Due to rounding, the sum of the four quarters may not add to the year to date total.

Regulatory Matters (Details)

Regulatory Matters (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity Tier One Risk Based Capital	$ 534,241
Common Equity Tier One Risk Based Capital to Risk Weighted Assets	9.80%
Common Equity Tier One Risk Based Capital Required for Capital Adequacy	$ 245,216
Common Equity Tier One Capital Required for Capital Adequacy to Risk Weighted Assets	4.50%
Tier One Risk Based Capital	$ 686,160	$ 637,968
Tier One Risk Based Capital to Risk Weighted Assets	12.59%	12.57%
Tier One Risk Based Capital Required for Capital Adequacy	$ 326,954	$ 202,959
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	6.00%	4.00%
Capital	$ 754,758	$ 701,705
Capital to Risk Weighted Assets	13.85%	13.83%
Capital Required for Capital Adequacy	$ 435,939	$ 405,918
Capital Required for Capital Adequacy to Risk Weighted Assets	8.00%	8.00%
Tier One Leverage Capital	$ 686,160	$ 637,968
Tier One Leverage Capital to Average Assets	9.50%	9.53%
Tier One Leverage Capital Required for Capital Adequacy	$ 289,059	$ 267,651
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	4.00%	4.00%
Boston Private Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity Tier One Risk Based Capital	$ 621,668
Common Equity Tier One Risk Based Capital to Risk Weighted Assets	11.49%
Common Equity Tier One Risk Based Capital Required for Capital Adequacy	$ 243,407
Common Equity Tier One Capital Required for Capital Adequacy to Risk Weighted Assets	4.50%
Common Equity Tier One Risk Based Capital Required to be Well Capitalized	$ 351,588
Common Equity Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	6.50%
Tier One Risk Based Capital	$ 621,668	$ 566,444
Tier One Risk Based Capital to Risk Weighted Assets	11.49%	11.25%
Tier One Risk Based Capital Required for Capital Adequacy	$ 324,543	$ 201,480
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	6.00%	4.00%
Tier One Risk Based Capital Required to be Well Capitalized	$ 432,723	$ 302,220
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	8.00%	6.00%
Capital	$ 689,437	$ 629,591
Capital to Risk Weighted Assets	12.75%	12.50%
Capital Required for Capital Adequacy	$ 432,723	$ 402,960
Capital Required for Capital Adequacy to Risk Weighted Assets	8.00%	8.00%
Capital Required to be Well Capitalized	$ 540,904	$ 503,700
Capital Required to be Well Capitalized to Risk Weighted Assets	10.00%	10.00%
Tier One Leverage Capital	$ 621,668	$ 566,444
Tier One Leverage Capital to Average Assets	8.68%	8.55%
Tier One Leverage Capital Required for Capital Adequacy	$ 286,461	$ 265,077
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	4.00%	4.00%
Tier One Leverage Capital Required to be Well Capitalized	$ 358,077	$ 331,346
Tier One Leverage Capital Required to be Well Capitalized to Average Assets	5.00%	5.00%

Regulatory Matters Text Details

Regulatory Matters Text Details (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier One Risk Based Capital	$ 686,160	$ 637,968
Junior Subordinated Debentures [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier One Risk Based Capital	$ 100,000	$ 100,000

Selected Quarterly Data (Una140

Selected Quarterly Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended																12 Months Ended
		Dec. 31, 2015		Sep. 30, 2015		Jun. 30, 2015		Mar. 31, 2015		Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Interest Income (Expense), Net		$ 48,140	[1]	$ 46,473	[1]	$ 45,085	[1]	$ 46,072	[1]	$ 44,128	[1]	$ 44,783	[1]	$ 46,268	[1]	$ 44,522	[1]	$ 185,770		$ 179,701		$ 174,018
Noninterest Income		37,718	[1]	39,446	[1]	42,660	[1]	41,345	[1]	39,922	[1]	33,769	[1]	34,374	[1]	32,733	[1]	161,169		140,798		136,341
Revenue, Net	[1]	85,858		85,919		87,745		87,417		84,050		78,552		80,642		77,255
Provision/ (credit) for loan losses		(1,655)	[1]	2,600	[1]	0	[1]	(2,500)	[1]	2,400	[1]	(2,600)	[1]	(5,000)	[1]	(1,200)	[1]	(1,555)		(6,400)		(10,000)
Noninterest Expense		67,407	[1]	61,929	[1]	62,418	[1]	63,427	[1]	63,760	[1]	53,999	[1]	54,402	[1]	54,968	[1]	255,181		227,129		220,705
Income before income taxes		20,106	[1]	21,390	[1]	25,327	[1]	26,490	[1]	17,890	[1]	27,153	[1]	31,240	[1]	23,487	[1]	93,313		99,770		99,654
Income tax expense		5,638	[1]	8,182	[1]	8,000	[1]	8,572	[1]	5,901	[1]	8,993	[1]	10,333	[1]	7,138	[1]	30,392	[2]	32,365	[2]	32,963	[2]
Net income from discontinued operations		1,455	[1]	1,316	[1]	1,546	[1]	2,094	[1]	1,510	[1]	1,272	[1]	1,450	[1]	1,928	[1]	6,411		6,160		7,792
Net Income (Loss) Attributable to Noncontrolling Interest		921	[1]	994	[1]	1,263	[1]	1,229	[1]	1,322	[1]	1,167	[1]	1,025	[1]	1,236	[1]	4,407		4,750		3,948
Net income attributable to the Company		$ 15,002	[1]	$ 13,530	[1]	$ 17,610	[1]	$ 18,783	[1]	$ 12,177	[1]	$ 18,265	[1]	$ 21,332	[1]	$ 17,041	[1]	$ 64,925		$ 68,815		$ 70,535
Earnings (Loss) Per Share, Basic		$ 0.17	[3]	$ 0.17	[3]	$ 0.20	[3]	$ 0.22	[3]	$ 0.14	[3]	$ 0.22	[3]	$ 0.26	[3]	$ 0.20	[3]	$ 0.76		$ 0.81		$ 0.70
Earnings/ (Loss) Per Share, Diluted		$ 0.17	[3]	$ 0.16	[3]	$ 0.20	[3]	$ 0.21	[3]	$ 0.13	[3]	$ 0.22	[3]	$ 0.25	[3]	$ 0.20	[3]	$ 0.74		$ 0.79		$ 0.68
[1]	Due to rounding, the sum of the four quarters may not add to the year to date total.
[2]	The Company’s effective tax rate for 2015, 2014, and 2013 are not consistent due to earnings from tax-exempt investments, non-deductible compensation, state and local taxes, income tax credits and income attributable to noncontrolling interests having a different impact on the effective tax rate due primarily to the different levels of income before taxes in years 2015, 2014, and 2013. See Part II. Item 8. “Financial Statements and Supplementary Data - Note 17: Income Taxes” for additional details.
[3]	Includes the effect of adjustments to net income attributable to the Company to arrive at net income attributable to common shareholders.