Washington Trust Bancorp (WASH) 10-Q 7 Aug 14 2014 Q2 Quarterly report Financial data

DOCUMENT_AND_ENTITY_INFORMATIO

DOCUMENT AND ENTITY INFORMATION	6 Months Ended
	Jun. 30, 2014	Jul. 31, 2014
Document and Entity Information [Abstract]	'	'
Entity Registrant Name	'Washington Trust Bancorp Inc	'
Entity Central Index Key	'0000737468	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Accelerated Filer	'
Document Type	'10-Q	'
Document Period End Date	30-Jun-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q2	'
Amendment Flag	'false	'
Entity Common Stock, Shares Outstanding	'	16,713,577

CONSOLIDATED_BALANCE_SHEETS_Un

CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $)	Jun. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Assets:	'		'
Cash and due from banks	$145,408		$81,939
Short-term investments	3,781		3,378
Mortgage loans held for sale, at fair value	22,407		11,636
Securities:	'		'
Available for sale, at fair value	327,578		392,903
Held to maturity, at cost	27,814		29,905
Total securities	355,392		422,808
Federal Home Loan Bank stock, at cost	37,730		37,730
Loans:	'		'
Commercial	1,366,170		1,363,335
Residential real estate	876,639		772,674
Consumer	338,315		326,875
Total loans	2,581,124	[1]	2,462,884	[1]
Less allowance for loan losses	27,269		27,886
Net loans	2,553,855		2,434,998
Premises and equipment, net	26,518		25,402
Investment in bank-owned life insurance	57,559		56,673
Goodwill	58,114		58,114
Identifiable intangible assets, net	5,165		5,493
Other assets	51,093		50,696
Total assets	3,317,022		3,188,867
Liabilities:	'		'
Demand deposits	411,586		440,785
NOW accounts	314,060		309,771
Money market accounts	772,084		666,646
Savings accounts	292,112		297,357
Time deposits	796,255		790,762
Total deposits	2,586,097		2,505,321
Federal Home Loan Bank advances	322,056		288,082
Junior subordinated debentures	22,681		22,681
Other liabilities	42,738		43,137
Total liabilities	2,973,572		2,859,221
Commitments and contingencies	'		'
Shareholders' Equity:	'		'
Common stock of $.0625 par value; authorized 30,000,000 shares	1,044		1,038
Paid-in capital	99,288		97,566
Retained earnings	241,918		232,595
Accumulated other comprehensive gain (loss)	1,200		-1,553
Total shareholders' equity	343,450		329,646
Total liabilities and shareholders’ equity	$3,317,022		$3,188,867
[1]	Includes net unamortized loan origination costs of $1.5 million and $879 thousand, respectively, and net unamortized premiums on purchased loans of $100 thousand and $99 thousand, respectively, at June 30, 2014 and December 31, 2013.

CONSOLIDATED_BALANCE_SHEETS_Un1

CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]	'	'
Securities held to maturity, fair value	$28,618	$29,865
Common stock, par value	$0.06	$0.06
Common stock, shares authorized	30,000,000	30,000,000
Common stock, shares issued	16,705,427	16,613,561
Common stock, shares outstanding	16,705,427	16,613,561

CONSOLIDATED_STATEMENTS_OF_INC

CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Interest income:	'	'	'	'
Interest and fees on loans	$26,169	$25,513	$51,758	$50,736
Interest on securities: Taxable	2,699	2,576	5,641	5,421
Interest on securities: Nontaxable	557	647	1,139	1,306
Dividends on Federal Home Loan Bank stock	138	39	280	77
Other interest income	28	24	63	52
Total interest and dividend income	29,591	28,799	58,881	57,592
Interest expense:	'	'	'	'
Deposits	3,120	3,096	6,089	6,290
Federal Home Loan Bank advances	1,758	2,679	3,999	5,416
Junior subordinated debentures	241	612	482	1,002
Other interest expense	4	3	7	8
Total interest expense	5,123	6,390	10,577	12,716
Net interest income	24,468	22,409	48,304	44,876
Provision for loan losses	450	700	750	1,300
Net interest income after provision for loan losses	24,018	21,709	47,554	43,576
Noninterest income:	'	'	'	'
Wealth management revenues	8,530	7,912	16,595	15,386
Merchant processing fees	0	2,613	1,291	4,590
Net gains on loan sales and commissions on loans originated for others	1,707	3,485	2,946	7,651
Service charges on deposit accounts	824	790	1,578	1,581
Card interchange fees	779	683	1,460	1,282
Income from bank-owned life insurance	441	461	886	928
Net gains (losses) on interest rate swap contracts	-37	152	223	171
Equity in earnings (losses) of unconsolidated subsidiaries	-107	-57	-150	-18
Net gain on sale of business line	0	0	6,265	0
Other income	677	355	1,090	761
Noninterest income, excluding other-than-temporary impairment losses	12,814	16,394	32,184	32,332
Total other-than-temporary impairment losses on securities	0	0	0	-613
Portion of loss recognized in other comprehensive income (before taxes)	0	0	0	-2,159
Net impairment losses recognized in earnings	0	0	0	-2,772
Total noninterest income	12,814	16,394	32,184	29,560
Noninterest expense:	'	'	'	'
Salaries and employee benefits	14,771	15,542	29,329	30,984
Net occupancy	1,475	1,364	3,115	2,878
Equipment	1,235	1,192	2,471	2,436
Merchant processing costs	0	2,211	1,050	3,884
Outsourced services	1,015	871	2,059	1,712
Legal, audit and professional fees	598	554	1,216	1,162
FDIC deposit insurance costs	413	451	853	882
Advertising and promotion	540	476	772	831
Amortization of intangibles	164	173	328	346
Foreclosed property costs	43	137	21	184
Debt prepayment penalties	0	0	6,294	0
Other expenses	2,194	2,034	4,232	3,890
Total noninterest expense	22,448	25,005	51,740	49,189
Income before income taxes	14,384	13,098	27,998	23,947
Income tax expense	4,587	4,115	8,903	7,543
Net income	$9,797	$8,983	$19,095	$16,404
Weighted average common shares outstanding - basic	16,678	16,454	16,653	16,428
Weighted average common shares outstanding - diluted	16,831	16,581	16,817	16,558
Per share information:	'	'	'	'
Basic earnings per common share	$0.59	$0.54	$1.14	$0.99
Diluted earnings per common share	$0.58	$0.54	$1.13	$0.99
Cash dividends declared per share	$0.29	$0.25	$0.58	$0.50

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $)	3 Months Ended				6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Statement of Comprehensive Income [Abstract]	'		'		'		'
Net income	$9,797		$8,983		$19,095		$16,404
Securities available for sale:	'		'		'		'
Changes in fair value in securities available for sale	1,817		-3,821		2,429		-4,874
Net losses (gains) on securities reclassified into earnings	0	[1]	0	[1]	0	[1]	393	[1]
Net change in fair value of securities available for sale	1,817		-3,821		2,429		-4,481
Reclassification adjustment for other-than-temporary impairment losses transferred into earnings	0	[2]	0	[2]	0	[2]	1,384	[2]
Cash flow hedges:	'		'		'		'
Change in fair value of cash flow hedges	-14		34		-30		32
Net cash flow hedge losses reclassified into earnings	93	[3]	118	[3]	185	[3]	240	[3]
Net change in fair value of cash flow hedges	79		152		155		272
Defined benefit plan obligation adjustment	81	[4]	292	[4]	169	[4]	629	[4]
Total other comprehensive (loss) income, net of tax	1,977		-3,377		2,753		-2,196
Total comprehensive income	$11,774		$5,606		$21,848		$14,208
[1]	Reported as total other-than-temporary impairment losses on securities in the Consolidated Statements of Income.
[2]	Reported as the portion of loss recognized in other comprehensive income in the Consolidated Statements of Income.
[3]	Included in interest expense on junior subordinated debentures in the Consolidated Statements of Income.
[4]	Included in salaries and employee benefits expense in the Consolidated Statements of Income.

CONSOLIDATED_STATEMENTS_OF_CHA

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) (USD $)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
In Thousands, except Share data
Stockholders' Equity, Beginning Balance at Dec. 31, 2012	$295,652	$1,024	$91,453	$213,674	($10,499)
Common Stock, Shares Outstanding, Beginning Balance at Dec. 31, 2012	'	16,380,000	'	'	'
Net income	16,404	'	'	16,404	'
Total other comprehensive income (loss), net of tax	-2,196	'	'	'	-2,196
Cash dividends declared	-8,317	'	'	-8,317	'
Share-based compensation	879	'	879	'	'
Deferred compensation plan, shares	'	2,000	'	'	'
Deferred compensation plan	30	0	30	'	'
Exercise of stock options, issuance of other compensation-related equity instruments and related tax benefit, shares	'	105,000	'	'	'
Exercise of stock options, issuance of other compensation-related equity instruments and related tax benefit	918	6	912	'	'
Stockholders' Equity, Ending Balance at Jun. 30, 2013	303,370	1,030	93,274	221,761	-12,695
Common Stock, Shares Outstanding, Ending Balance at Jun. 30, 2013	'	16,487,000	'	'	'
Stockholders' Equity, Beginning Balance at Dec. 31, 2013	329,646	1,038	97,566	232,595	-1,553
Common Stock, Shares Outstanding, Beginning Balance at Dec. 31, 2013	16,613,561	16,614,000	'	'	'
Net income	19,095	'	'	19,095	'
Total other comprehensive income (loss), net of tax	2,753	'	'	'	2,753
Cash dividends declared	-9,772	'	'	-9,772	'
Share-based compensation	961	'	961	'	'
Exercise of stock options, issuance of other compensation-related equity instruments and related tax benefit, shares	'	91,000	'	'	'
Exercise of stock options, issuance of other compensation-related equity instruments and related tax benefit	767	6	761	'	'
Stockholders' Equity, Ending Balance at Jun. 30, 2014	$343,450	$1,044	$99,288	$241,918	$1,200
Common Stock, Shares Outstanding, Ending Balance at Jun. 30, 2014	16,705,427	16,705,000	'	'	'

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:	'	'
Net income	$19,095	$16,404
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Provision for loan losses	750	1,300
Depreciation of premises and equipment	1,564	1,677
Foreclosed and repossessed property valuation adjustments	39	72
Net amortization of premium and discount	373	887
Net amortization of intangibles	328	346
Share-based compensation	961	879
Income from bank-owned life insurance	-886	-928
Net gain on sale of business line	6,265	0
Net gains on loan sales and commissions on loans originated for others	-2,946	-7,651
Net impairment losses recognized in earnings	0	2,772
Net losses (gains) on interest rate swap contracts	-223	-171
Equity in (earnings) losses of unconsolidated subsidiaries	150	18
Proceeds from sales of loans	111,075	256,362
Loans originated for sale	-119,373	-231,167
Decrease (increase) in other assets	-828	5,242
Decrease (increase) in other liabilities	-2,876	-9,246
Net cash provided (used in) by operating activities	938	36,796
Cash flows from investing activities:	'	'
Purchases of mortgage-backed securities available for sale	-9,987	-1,036
Purchases of other investment securities available for sale	0	-424
Proceeds from sale of other investment securities available for sale	547	0
Maturities and principal payments of mortgage-backed securities available for sale	51,724	45,561
Maturities and principal payments of other investment securities available for sale	26,507	6,550
Maturities and principal payments of mortgage-backed securities held to maturity	1,977	6,279
Remittance of Federal Home Loan Bank stock	0	2,688
Net proceeds from sale of business line	6,305	0
Proceeds received and deferred in connection with sale of business line	900	0
Net increase in loans	-112,951	-84,443
Purchases of loans, including purchased interest	-6,088	-7,222
Proceeds from the sale of property acquired through foreclosure or repossession	671	1,481
Purchases of premises and equipment	-2,681	-837
Net cash provided by (used in) investing activities	-43,076	-31,403
Cash flows from financing activities:	'	'
Net increase (decrease) in deposits	80,776	-8,022
Net decrease in other borrowings	-22	-1,013
Proceeds from Federal Home Loan Bank advances	234,000	204,000
Repayment of Federal Home Loan Bank advances	-200,026	-191,831
Proceeds from the exercise of stock options and issuance of other compensation-related equity instruments	376	672
Tax benefit from stock option exercises and issuance of other compensation-related equity instruments	391	276
Redemption of junior subordinated debentures	0	10,310
Cash dividends paid	-9,485	-8,148
Net cash provided by (used in) financing activities	106,010	-14,376
Net increase (decrease) in cash and cash equivalents	63,872	-8,983
Cash and cash equivalents at beginning of period	85,317	92,650
Cash and cash equivalents at end of period	149,189	83,667
Noncash Investing and Financing Activities:	'	'
Loans charged off	1,490	4,549
Loans transferred to property acquired through foreclosure or repossession	1,016	1,050
Supplemental Disclosures:	'	'
Interest payments	10,440	12,446
Income tax payments	$7,965	$7,328

General_Information

General Information	6 Months Ended
	Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
General Information	'
	General Information
	Washington Trust Bancorp, Inc. (the “Bancorp”) is a publicly-owned registered bank holding company and financial holding company.  The Bancorp owns all of the outstanding common stock of The Washington Trust Company (the “Bank”), a Rhode Island chartered commercial bank founded in 1800.  Through its subsidiaries, the Bancorp offers a complete product line of financial services including commercial, residential and consumer lending, retail and commercial deposit products, and wealth management services through its offices in Rhode Island, eastern Massachusetts and Connecticut.
	The consolidated financial statements include the accounts of the Bancorp and its subsidiaries (collectively, the “Corporation” or “Washington Trust”).  All significant intercompany transactions have been eliminated.
	The accounting and reporting policies of the Corporation conform to accounting principles generally accepted in the United States of America (“GAAP”) and to general practices of the banking industry.  In preparing the financial statements, management is required to make 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 are the determination of the allowance for loan losses, the review of goodwill and other intangible assets for impairment and the assessment of investment securities for impairment.
	The unaudited consolidated financial statements of the Corporation presented herein have been prepared pursuant to the rules of the Securities and Exchange Commission (“SEC”) for quarterly reports on Form 10-Q and do not include all of the information and note disclosures required by GAAP. In the opinion of management, all adjustments (consisting of normal recurring adjustments) and disclosures considered necessary for the fair presentation of the accompanying consolidated financial statements have been included. Interim results are not necessarily reflective of the results of the entire year. The accompanying unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Annual Report on Form 10-K for the fiscal year ended December 31, 2013.

Recently_Issued_Accounting_Pro

Recently Issued Accounting Pronouncements	6 Months Ended
	Jun. 30, 2014
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]	'
Recently Issued Accounting Pronouncements	'
	Recently Issued Accounting Pronouncements
	Investments - Equity Method and Joint Ventures - Topic 323
	Accounting Standards Update No. 2014-01, “Accounting for Investments in Qualified Affordable Housing Projects” (“ASU 2014-01”), was issued in January 2014 and permits a reporting entity to make an accounting policy election to account for investments in qualified affordable housing projects using the proportional amortization method if certain conditions are met. The amendments are expected to enable more entities to record the amortization of the investment in income tax expense together with the tax credits and other tax benefits generated from the partnership. ASU 2014-01 is effective retrospectively for public business entities for annual and interim reporting periods, beginning after December 15, 2014. Early adoption is permitted. The adoption of ASU 2014-01 is not expected to have a material impact on the Corporation’s consolidated financial statements.
	Receivables - Troubled Debt Restructurings by Creditors - Topic 310
	Accounting Standards Update No. 2014-04, “Reclassifications of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure” (“ASU 2014-04”), was issued in January 2014 and clarifies when banks and similar institutions (creditors) should reclassify mortgage loans collateralized by residential real estate properties from the loan portfolio to other real estate owned (OREO). ASU 2014-04 is effective for annual periods beginning after December 15, 2014, and interim periods with annual periods beginning after December 15, 2015. An entity can elect either a modified retrospective or prospective transition method, and early adoption is permitted. The adoption of ASU 2014-04 is not expected to have a material impact on the Corporation’s consolidated financial statements.
	Revenue from Contracts with Customers - Topic 606
	Accounting Standards Update No. 2014-09, “Revenue from Contracts with Customers” (“ASU 2014-09”), was issued in May 2014 and provides a revenue recognition framework for any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of non-financial assets unless those contracts are within the scope of other accounting standards. ASU 2014-09 is effective for annual periods beginning after December 15, 2016, including interim periods within that reporting period with early adoption not permitted. The standard permits the use of either the retrospective or cumulative effect transition method. The Corporation is currently evaluating the impact that ASU 2014-09 will have on the its consolidated financial statements and related disclosures. The Corporation has not yet selected a transition method nor has it determined the effect of ASU 2014-09 on its ongoing financial reporting.

Cash_and_Due_from_Banks

Cash and Due from Banks	6 Months Ended
	Jun. 30, 2014
Cash and Cash Equivalents [Abstract]	'
Cash and Due from Banks	'
	Cash and Due from Banks
	The Bank maintains certain average reserve balances to meet the requirements of the Board of Governors of the Federal Reserve System (“FRB”).  Some or all of these reserve requirements may be satisfied with vault cash. Reserve balances amounted to $5.9 million at June 30, 2014 and $6.7 million at December 31, 2013 and were included in cash and due from banks in the Consolidated Balance Sheets.
	As of June 30, 2014 and December 31, 2013, cash and due from banks included interest-bearing deposits in other banks of $92.9 million and $51.8 million, respectively.

Securities

Securities	6 Months Ended
	Jun. 30, 2014
Investments, Debt and Equity Securities [Abstract]	'
Securities	'
	Securities
	The following tables present the amortized cost, gross unrealized holding gains, gross unrealized holding losses and fair value of securities by major security type and class of security:
	(Dollars in thousands)
	June 30, 2014	Amortized Cost				Unrealized Gains				Unrealized Losses				Fair Value
	Securities Available for Sale:
	Obligations of U.S. government-sponsored enterprises		$9,999				$13				$—				$10,012
	Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises	217,767				10,531				(13		)		228,285
	Obligations of states and political subdivisions	54,161				2,230				—				56,391
	Individual name issuer trust preferred debt securities	30,734				—				(4,099		)		26,635
	Corporate bonds	6,123				133				(1		)		6,255
	Total securities available for sale		$318,784				$12,907				($4,113	)			$327,578
	Held to Maturity:
	Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises		$27,814				$804				$—				$28,618
	Total securities held to maturity		$27,814				$804				$—				$28,618
	Total securities		$346,598				$13,711				($4,113	)			$356,196
	(Dollars in thousands)
	December 31, 2013	Amortized Cost				Unrealized Gains				Unrealized Losses				Fair Value
	Securities Available for Sale:
	Obligations of U.S. government-sponsored enterprises		$54,474				$720				($79	)			$55,115
	Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises	230,387				8,369				(401		)		238,355
	Obligations of states and political subdivisions	60,659				2,200				—				62,859
	Trust preferred securities:
	Individual name issuers	30,715				—				(6,031		)		24,684
	Collateralized debt obligations	547				—				—				547
	Corporate bonds	11,128				231				(16		)		11,343
	Total securities available for sale		$387,910				$11,520				($6,527	)			$392,903
	Held to Maturity:
	Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises		$29,905				$14				($54	)			$29,865
	Total securities held to maturity		$29,905				$14				($54	)			$29,865
	Total securities		$417,815				$11,534				($6,581	)			$422,768
	At June 30, 2014 and December 31, 2013, securities available for sale and held to maturity with a fair value of $339.9 million and $397.5 million, respectively, were pledged as collateral for Federal Home Loan Bank of Boston (“FHLBB”) borrowings and letters of credit, potential borrowings with the FRB, certain public deposits and for other purposes.
	The schedule of maturities of debt securities available for sale and held to maturity is presented below. Mortgage-backed securities are included based on weighted average maturities, adjusted for anticipated prepayments.  All other debt securities are included based on contractual maturities.  Actual maturities may differ from amounts presented because certain issuers have the right to call or prepay obligations with or without call or prepayment penalties.  Yields on tax exempt obligations are not computed on a tax equivalent basis.
		June 30, 2014
	(Dollars in thousands)	Within 1 Year				1-5 Years				5-10 Years				After 10 Years				Totals
	Securities Available for Sale:
	Obligations of U.S. government-sponsored enterprises:
	Amortized cost		$9,999				$—				$—				$—				$9,999
	Weighted average yield	2.87		%		—		%		—		%		—		%		2.87		%
	Mortgage-backed securities issued by U.S. government-sponsored enterprises:
	Amortized cost	38,199				100,451				53,538				25,579				217,767
	Weighted average yield	3.98		%		3.61		%		2.85		%		2.12		%		3.31		%
	Obligations of state and political subdivisions:
	Amortized cost	18,072				36,089				—				—				54,161
	Weighted average yield	3.85		%		3.93		%		—		%		—		%		3.9		%
	Individual name issuer trust preferred debt securities:
	Amortized cost	—				—				—				30,734				30,734
	Weighted average yield	—		%		—		%		—		%		1.07		%		1.07		%
	Corporate bonds:
	Amortized cost	—				5,919				204				—				6,123
	Weighted average yield	—		%		2.76		%		3.2		%		—		%		2.78		%
	Total debt securities available for sale:
	Amortized cost		$66,270				$142,459				$53,742				$56,313				$318,784
	Weighted average yield	3.77		%		3.66		%		2.85		%		1.55		%		3.17		%
	Fair value		$68,872				$144,962				$56,196				$57,548				$327,578
	Securities Held to Maturity:
	Mortgage-backed securities issued by U.S. government-sponsored enterprises:
	Amortized cost		$3,400				$10,557				$8,373				$5,484				$27,814
	Weighted average yield	3.1		%		3.03		%		2.83		%		1.08		%		2.59		%
	Fair value		$3,498				$10,862				$8,615				$5,643				$28,618
	Included in the above table were debt securities with an amortized cost balance of $85.1 million and a fair value of $82.8 million at June 30, 2014 that are callable at the discretion of the issuers.  Final maturities of the callable securities range from fifteen months to twenty-three years, with call features ranging from one month to three years.
	Other-Than-Temporary Impairment Assessment
	The Corporation assesses whether the decline in fair value of investment securities is other-than-temporary on a regular basis. Unrealized losses on debt securities may occur from current market conditions, increases in interest rates since the time of purchase, a structural change in an investment, volatility of earnings of a specific issuer, or deterioration in credit quality of the issuer.  Management evaluates impairments in value both qualitatively and quantitatively to assess whether they are other-than-temporary.
	The following tables summarize temporarily impaired securities, segregated by length of time the securities have been in a continuous unrealized loss position:
(Dollars in thousands)	Less than 12 Months											12 Months or Longer										Total
June 30, 2014	#			Fair				Unrealized				#			Fair				Unrealized			#	Fair		Unrealized
				Value				Losses							Value				Losses				Value		Losses
Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises	—				$—				$—			1				$935				($13	)	1		$935		($13	)
Individual name issuer trust preferred debt securities	—			—				—				11			26,635				(4,099		)	11	26,635		(4,099		)
Corporate bonds	—			—				—				1			201				(1		)	1	201		(1		)
Total temporarily impaired securities	—			—					$—			13				$27,771				($4,113	)	13		$27,771		($4,113	)
(Dollars in thousands)	Less than 12 Months											12 Months or Longer										Total
December 31, 2013	#			Fair				Unrealized				#			Fair				Unrealized			#	Fair		Unrealized
				Value				Losses							Value				Losses				Value		Losses
Obligations of U.S. government-sponsored enterprises	1				$9,909				($79	)		—				$—				$—		1		$9,909		($79	)
Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises	7			76,748				(455		)		—			—				—			7	76,748		(455		)
Individual name issuer trust preferred debt securities	—			—				—				11			24,684				(6,031		)	11	24,684		(6,031		)
Corporate bonds	2			407				(16		)		—			—				—			2	407		(16		)
Total temporarily impaired securities	10				$87,064				($550	)		11				$24,684				($6,031	)	21		$111,748		($6,581	)
Further deterioration in credit quality of the underlying issuers of the securities, further deterioration in the condition of the financial services industry, a continuation or worsening of the current economic environment, or additional declines in real estate values, among other things, may further affect the fair value of these securities and increase the potential that certain unrealized losses be designated as other-than-temporary in future periods, and the Corporation may incur additional write-downs.
Trust Preferred Debt Securities of Individual Name Issuers
Included in debt securities in an unrealized loss position at June 30, 2014 were eleven trust preferred security holdings issued by seven individual companies in the banking sector.  Management believes the decline in fair value of these trust preferred securities primarily reflects investor concerns about global economic growth and how it will affect potential future losses in the financial services industry.  These concerns resulted in increased risk premiums for securities in this sector. Based on the information available through the filing date of this report, all individual name issuer trust preferred debt securities held in our portfolio continue to accrue and make payments as expected with no payment deferrals or defaults on the part of the issuers.  As of June 30, 2014, individual name issuer trust preferred debt securities with an amortized cost of $11.9 million and unrealized losses of $1.6 million were rated below investment grade by Standard & Poors, Inc. (“S&P”).  Management reviewed the collectibility of these securities taking into consideration such factors as the financial condition of the issuers, reported regulatory capital ratios of the issuers, credit ratings including ratings in effect as of the reporting period date as well as credit rating changes between the reporting period date and the filing date of this report and other information.  We noted no additional downgrades to below investment grade between the reporting period date and the filing date of this report.  Based on these analyses, management concluded that it expects to recover the entire amortized cost basis of these securities.  Furthermore, Washington Trust does not intend to sell these securities and it is not more-likely-than-not that Washington Trust will be required to sell these securities before recovery of their cost basis, which may be maturity.  Therefore, management does not consider these investments to be other-than-temporarily impaired at June 30, 2014.
Credit-Related Impairment Losses Recognized on Debt Securities
The following table presents a rollforward of the cumulative credit-related impairment losses on debt securities held by the Corporation:
(Dollars in thousands)	Three months								Six months
Periods ended June 30,	2014				2013				2014				2013
Balance at beginning of period		$—				$1,229				$—				$3,325
Credit-related impairment loss on debt securities for which an other-than-temporary impairment was not previously recognized	—				—				—				—
Additional increases to the amount of credit-related impairment loss on debt securities for which an other-than-temporary impairment was previously recognized	—				—				—				2,772
Reductions for securities for which a liquidation notice was received during the period	—				—				—				(4,868		)
Balance at end of period		$—				$1,229				$—				$1,229
The January 1, 2014 beginning balance of the cumulative credit-related impairment losses was corrected from the $6.8 million reported in our Form 10-K for the fiscal year ended December 31, 2013 to reflect the impact of the notice of liquidation of a pooled trust preferred security that occurred during the first quarter of 2013 and management’s change in intent to no longer hold its other pooled trust preferred security, which was made in December 2013.

Loans

Loans	6 Months Ended
	Jun. 30, 2014
Receivables [Abstract]	'
Loans	'
	Loans
	The following is a summary of loans:
	(Dollars in thousands)	June 30, 2014						December 31, 2013
		Amount			%			Amount				%
	Commercial:
	Mortgages (1)		$772,772		30	%			$796,249			32	%
	Construction and development (2)	38,574			1			36,289				1
	Other (3)	554,824			22			530,797				22
	Total commercial	1,366,170			53			1,363,335				55
	Residential real estate:
	Mortgages	846,187			33			749,163				30
	Homeowner construction	30,452			1			23,511				1
	Total residential real estate	876,639			34			772,674				31
	Consumer:
	Home equity lines	237,390			9			231,362				9
	Home equity loans	45,632			2			40,212				2
	Other (4)	55,293			2			55,301				3
	Total consumer	338,315			13			326,875				14
	Total loans (5)		$2,581,124		100	%			$2,462,884			100	%
	-1	Amortizing mortgages and lines of credit, primarily secured by income producing property.
	-2	Loans for construction commercial properties, loans to developers for construction of residential properties and loans for land development.
	-3	Loans to businesses and individuals, a substantial portion of which are fully or partially collateralized by real estate.
	-4	Fixed-rate consumer installment loans.
	-5	Includes net unamortized loan origination costs of $1.5 million and $879 thousand, respectively, and net unamortized premiums on purchased loans of $100 thousand and $99 thousand, respectively, at June 30, 2014 and December 31, 2013.
	At June 30, 2014 and December 31, 2013, there were $1.18 billion and $1.14 billion, respectively, of loans pledged as collateral to the FHLBB under a blanket pledge agreement and to the FRB for the discount window. See Note 8 for additional disclosure regarding borrowings.
	Nonaccrual Loans
	Loans, with the exception of certain well-secured loans that are in the process of collection, are placed on nonaccrual status and interest recognition is suspended when such loans are 90 days or more overdue with respect to principal and/or interest or sooner if considered appropriate by management. Well-secured loans are permitted to remain on accrual status provided that full collection of principal and interest is assured and the loan is in the process of collection. Loans are also placed on nonaccrual status when, in the opinion of management, full collection of principal and interest is doubtful. Interest previously accrued but not collected on such loans is reversed against current period income. Subsequent interest payments received on nonaccrual loans are applied to the outstanding principal balance of the loan or recognized as interest income depending on management’s assessment of the ultimate collectability of the loan. Loans are removed from nonaccrual status when they have been current as to principal and interest for a period of time, the borrower has demonstrated an ability to comply with repayment terms, and when, in management’s opinion, the loans are considered to be fully collectible.
	The following is a summary of nonaccrual loans, segregated by class of loans:
	(Dollars in thousands)	Jun 30,			Dec 31,
		2014			2013
	Commercial:
	Mortgages		$2,290			$7,492
	Construction and development	—			—
	Other	1,615			1,291
	Residential real estate:
	Mortgages	7,417			8,315
	Homeowner construction	—			—
	Consumer:
	Home equity lines	724			469
	Home equity loans	321			687
	Other	168			48
	Total nonaccrual loans		$12,535			$18,302
	Accruing loans 90 days or more past due		$—			$—
	As of June 30, 2014 and December 31, 2013, nonaccrual loans of $2.1 million and $2.7 million, respectively, were current as to the payment of principal and interest.
	At June 30, 2014, there were no significant commitments to lend additional funds to borrowers whose loans were on nonaccrual status.
	Past Due Loans
	Past due status is based on the contractual payment terms of the loan. The following tables present an age analysis of past due loans, segregated by class of loans:
	(Dollars in thousands)	Days Past Due
	June 30, 2014	30-59			60-89				Over 90				Total Past Due				Current				Total Loans
	Commercial:
	Mortgages		$311			$1,583				$2,250				$4,144				$768,628				$772,772
	Construction and development	—			—				—				—				38,574				38,574
	Other	1,785			773				417				2,975				551,849				554,824
	Residential real estate:
	Mortgages	5,249			855				4,335				10,439				835,748				846,187
	Homeowner construction	—			—				—				—				30,452				30,452
	Consumer:
	Home equity lines	1,227			554				280				2,061				235,329				237,390
	Home equity loans	309			18				106				433				45,199				45,632
	Other	353			530				126				1,009				54,284				55,293
	Total loans		$9,234			$4,313				$7,514				$21,061				$2,560,063				$2,581,124
	(Dollars in thousands)	Days Past Due
	December 31, 2013	30-59			60-89				Over 90				Total Past Due				Current				Total Loans
Commercial:
Mortgages		$—			$—				$7,492				$7,492				$788,757				$796,249
Construction and development	—			—				—				—				36,289				36,289
Other	276			302				731				1,309				529,488				530,797
Residential real estate:
Mortgages	4,040			1,285				5,633				10,958				738,205				749,163
Homeowner construction	—			—				—				—				23,511				23,511
Consumer:
Home equity lines	831			100				269				1,200				230,162				231,362
Home equity loans	448			66				349				863				39,349				40,212
Other	43			—				38				81				55,220				55,301
Total loans		$5,638			$1,753				$14,512				$21,903				$2,440,981				$2,462,884
Included in past due loans as of June 30, 2014 and December 31, 2013, were nonaccrual loans of $10.4 million and $15.6 million, respectively. All loans 90 days or more past due at June 30, 2014 and December 31, 2013 were classified as nonaccrual.
Impaired Loans
Impaired loans are loans for which it is probable that the Corporation will not be able to collect all amounts due according to the contractual terms of the loan agreements and loans restructured in a troubled debt restructuring. Impaired loans do not include large groups of smaller-balance homogeneous loans that are collectively evaluated for impairment, which consist of most residential mortgage loans and consumer loans.
The following is a summary of impaired loans:
(Dollars in thousands)	Recorded							Unpaid								Related
	Investment (1)							Principal								Allowance
	Jun 30,			Dec 31,				Jun 30,				Dec 31,				Jun 30,				Dec 31,
	2014			2013				2014				2013				2014				2013
No Related Allowance Recorded:
Commercial:
Mortgages		$9,160			$998				$9,135				$998				$—				$—
Construction and development	—			—				—				—				—				—
Other	1,032			1,055				1,032				1,050				—				—
Residential real estate:
Mortgages	2,226			1,167				2,354				1,259				—				—
Homeowner construction	—			—				—				—				—				—
Consumer:
Home equity lines	—			—				—				—				—				—
Home equity loans	—			—				—				—				—				—
Other	—			—				—				—				—				—
Subtotal		$12,418			$3,220				$12,521				$3,307				$—				$—
With Related Allowance Recorded:
Commercial:
Mortgages		$15,788			$29,335				$16,275				$31,731				$747				$552
Construction and development	—			—				—				—				—				—
Other	1,556			1,506				1,843				1,945				324				463
Residential real estate:
Mortgages	2,253			3,122				2,538				3,507				390				463
Homeowner construction	—			—				—				—				—				—
Consumer:
Home equity lines	82			173				82				174				41				1
Home equity loans	94			55				91				54				21				—
Other	119			127				117				130				2				2
Subtotal		$19,892			$34,318				$20,946				$37,541				$1,525				$1,481
Total impaired loans		$32,310			$37,538				$33,467				$40,848				$1,525				$1,481
Total:
Commercial		$27,536			$32,894				$28,285				$35,724				$1,071				$1,015
Residential real estate	4,479			4,289				4,892				4,766				390				463
Consumer	295			355				290				358				64				3
Total impaired loans		$32,310			$37,538				$33,467				$40,848				$1,525				$1,481
-1	The recorded investment in impaired loans consists of unpaid principal balance, net of charge-offs, interest payments received applied to principal and unamortized deferred loan origination fees and costs. For impaired accruing loans (troubled debt restructurings for which management has concluded that the collectibility of the loan is not in doubt), the recorded investment also includes accrued interest.
The following table presents the average recorded investment balance of impaired loans and interest income recognized on impaired loans segregated by loan class, for the periods indicated:
(Dollars in thousands)	Average Recorded Investment							Interest Income Recognized
Three months ended June 30,	2014			2013				2014				2013
Commercial:
Mortgages		$25,093			$27,904				$240				$152
Construction and development	—			—				—				—
Other	2,492			7,385				15				50
Residential real estate:
Mortgages	4,452			4,496				36				27
Homeowner construction	—			—				—				—
Consumer:
Home equity lines	60			191				—				1
Home equity loans	157			69				2				1
Other	118			144				2				2
Totals		$32,372			$40,189				$295				$233
(Dollars in thousands)	Average Recorded Investment							Interest Income Recognized
Six months ended June 30,	2014			2013				2014				2013
Commercial:
Mortgages		$26,707			$24,423				$405				$252
Construction and development	—			—				—				—
Other	2,429			9,001				38				114
Residential real estate:
Mortgages	4,100			4,250				50				49
Homeowner construction	—			—				—				—
Consumer:
Home equity lines	97			227				2				4
Home equity loans	126			87				3				4
Other	122			153				4				4
Totals		$33,581			$38,141				$502				$427
Troubled Debt Restructurings
Loans are considered restructured in a troubled debt restructuring when the Corporation has granted concessions to a borrower due to the borrower’s financial condition that it otherwise would not have considered. These concessions may include modifications of the terms of the debt such as deferral of payments, extension of maturity, reduction of principal balance, reduction of the stated interest rate other than normal market rate adjustments, or a combination of these concessions. Debt may be bifurcated with separate terms for each tranche of the restructured debt. Restructuring a loan in lieu of aggressively enforcing the collection of the loan may benefit the Corporation by increasing the ultimate probability of collection.
Restructured loans are classified as accruing or non-accruing based on management’s assessment of the collectibility of the loan. Loans which are already on nonaccrual status at the time of the restructuring generally remain on nonaccrual status for approximately six months before management considers such loans for return to accruing status. Accruing restructured loans are placed into nonaccrual status if and when the borrower fails to comply with the restructured terms and management deems it unlikely that the borrower will return to a status of compliance in the near term.
Troubled debt restructurings are reported as such for at least one year from the date of the restructuring. In years after the restructuring, troubled debt restructured loans are removed from this classification if the restructuring did not involve a below market rate concession and the loan is not deemed to be impaired based on the terms specified in the restructuring agreement.
Troubled debt restructurings are classified as impaired loans. The Corporation identifies loss allocations for impaired loans on an individual loan basis. The recorded investment in troubled debt restructurings was $26.6 million at June 30, 2014 and $26.4 million at December 31, 2013. These amounts included accrued interest of $63 thousand and $44 thousand, respectively. The allowance for loan losses included specific reserves for these troubled debt restructurings of $795 thousand and $556 thousand, respectively, at June 30, 2014 and December 31, 2013. As of June 30, 2014, there were no significant commitments to lend additional funds to borrowers whose loans had been restructured.
The following table presents loans modified as a troubled debt restructuring during the periods indicated:
(Dollars in thousands)						Outstanding Recorded Investment (1)
	# of Loans					Pre-Modifications								Post-Modifications
Three months ended June 30,	2014		2013			2014				2013				2014				2013
Commercial:
Mortgages	—		3				$—				$9,504				$—				$9,504
Construction and development	—		—			—				—				—				—
Other	9		5			763				1,168				763				1,168
Residential real estate:
Mortgages	—		—			—				—				—				—
Homeowner construction	—		—			—				—				—				—
Consumer:
Home equity lines	—		—			—				—				—				—
Home equity loans	—		—			—				—				—				—
Other	—		—			—				—				—				—
Totals	9		8				$763				$10,672				$763				$10,672
(Dollars in thousands)						Outstanding Recorded Investment (1)
	# of Loans					Pre-Modifications								Post-Modifications
Six months ended June 30,	2014		2013			2014				2013				2014				2013
Commercial:
Mortgages	—		5				$—				$9,956				$—				$9,876
Construction and development	—		—			—				—				—				—
Other	9		5			763				1,168				763				1,168
Residential real estate:
Mortgages	2		—			479				—				479				—
Homeowner construction	—		—			—				—				—				—
Consumer:
Home equity lines	—		1			—				92				—				92
Home equity loans	—		—			—				—				—				—
Other	—		—			—				—				—				—
Totals	11		11				$1,242				$11,216				$1,242				$11,136
-1	The recorded investment in troubled debt restructurings consists of unpaid principal balance, net of charge-offs and unamortized deferred loan origination fees and costs, at the time of the restructuring. For accruing troubled debt restructured loans, the recorded investment also includes accrued interest.
The following table provides information on how loans were modified as a troubled debt restructuring during the periods indicated.
(Dollars in thousands)
	Three months							Six months
Periods ended June 30,	2014			2013				2014				2013
Below market interest rate concession		$77			$9,504				$77				$9,818
Payment deferral	—			—				479				—
Maturity / amortization concession	599			—				599				—
Interest only payments	—			323				—				415
Combination (1)	87			845				87				983
Total		$763			$10,672				$1,242				$11,216
-1	Loans included in this classification were modified with a combination of any two of the concessions listed in this table.
The following table presents loans modified in a troubled debt restructuring within the previous twelve months for which there was a payment default during the periods indicated:
(Dollars in thousands)	# of Loans					Recorded
						Investment (1)
Three months ended June 30,	2014		2013			2014				2013
Commercial:
Mortgages	—		1				$—				$482
Construction and development	—		—			—				—
Other	3		—			254				—
Residential real estate:
Mortgages	—		—			—				—
Homeowner construction	—		—			—				—
Consumer:
Home equity lines	—		—			—				—
Home equity loans	—		—			—				—
Other	—		—			—				—
Totals	3		1				$254				$482
(Dollars in thousands)	# of Loans					Recorded
						Investment (1)
Six months ended June 30,	2014		2013			2014				2013
Commercial:
Mortgages	—		2				$—				$717
Construction and development	—		—			—				—
Other	3		—			254				—
Residential real estate:
Mortgages	—		—			—				—
Homeowner construction	—		—			—				—
Consumer:
Home equity lines	—		—			—				—
Home equity loans	—		1			—				32
Other	—		—			—				—
Totals	3		3				$254				$749
-1	The recorded investment in troubled debt restructurings consists of unpaid principal balance, net of charge-offs and unamortized deferred loan origination fees and costs. For accruing troubled debt restructured loans, the recorded investment also includes accrued interest.
Credit Quality Indicators
Commercial
The Corporation utilizes an internal rating system to assign a risk to each of its commercial loans. Loans are rated on a scale of 1 to 10. This scale can be assigned to three broad categories including “pass” for ratings 1 through 6, “special mention” for 7-rated loans, and “classified” for loans rated 8, 9 or 10. The loan rating system takes into consideration parameters including the borrower’s financial condition, the borrower’s performance with respect to loan terms, and the adequacy of collateral. As of June 30, 2014 and December 31, 2013, the weighted average risk rating of the Corporation’s commercial loan portfolio was 4.61 and 4.64, respectively. For non-impaired loans, the Corporation assigns a loss allocation factor to each loan, based on its risk rating for purposes of establishing an appropriate allowance for loan losses. See Note 6 for additional information.
Descriptions of the commercial loan categories are as follows:
Pass - Loans with acceptable credit quality, defined as ranging from superior or very strong to a status of lesser stature. Superior or very strong credit quality is characterized by a high degree of cash collateralization or strong balance sheet liquidity. Lesser stature loans have an acceptable level of credit quality but exhibit some weakness in various credit metrics such as collateral adequacy, cash flow, or performance inconsistency or may be in an industry or of a loan type known to have a higher degree of risk.
Special Mention - Loans with potential weaknesses that deserve management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the asset or in the Bank’s position as creditor at some future date. Special Mention assets are not adversely classified and do not expose the Bank to sufficient risk to warrant adverse classification. Examples of these conditions include but are not limited to outdated or poor quality financial data, strains on liquidity and leverage, losses or negative trends in operating results, marginal cash flow, weaknesses in occupancy rates or trends in the case of commercial real estate and frequent delinquencies.
Classified - Loans identified as “substandard”, “doubtful” or “loss” based on criteria consistent with guidelines provided by banking regulators. A “substandard” loan has defined weaknesses which make payment default or principal exposure likely, but not yet certain. Such loans are apt to be dependent upon collateral liquidation, a secondary source of repayment or an event outside of the normal course of business. The loans are closely watched and are either already on nonaccrual status or may be placed on nonaccrual status when management determines there is uncertainty of collectibility. A “doubtful” loan is placed on non-accrual status and has a high probability of loss, but the extent of the loss is difficult to quantify due to dependency upon collateral having a value that is difficult to determine or upon some near-term event which lacks certainty. A loan in the “loss” category is considered generally uncollectible or the timing or amount of payments cannot be determined. “Loss” is not intended to imply that the loan has no recovery value but rather it is not practical or desirable to continue to carry the asset.
The Corporation’s procedures call for loan ratings and classifications to be revised whenever information becomes available that indicates a change is warranted. The criticized loan portfolio, which consists of commercial and commercial real estate loans that are risk rated special mention or worse, are reviewed by management on a quarterly basis, focusing on the current status and strategies to improve the credit. An annual loan review program is conducted by a third party to provide an independent evaluation of the creditworthiness of the commercial loan portfolio, the quality of the underwriting and credit risk management practices and the appropriateness of the risk rating classifications. This review is supplemented with selected targeted internal reviews of the commercial loan portfolio.
The following table presents the commercial loan portfolio, segregated by category of credit quality indicator:
(Dollars in thousands)	Pass							Special Mention								Classified
	Jun 30,			Dec 31,				Jun 30,				Dec 31,				Jun 30,				Dec 31,
	2014			2013				2014				2013				2014				2013
Mortgages		$742,025			$756,838				$22,819				$23,185				$7,928				$16,226
Construction and development	38,574			36,289				—				—				—				—
Other	535,811			507,962				15,900				19,887				3,113				2,948
Total commercial loans		$1,316,410			$1,301,089				$38,719				$43,072				$11,041				$19,174
Residential and Consumer
The residential and consumer portfolios are monitored on an ongoing basis by the Corporation using delinquency information and loan type as credit quality indicators. These credit quality indicators are assessed on an aggregate basis in these relatively homogeneous portfolios. For non-impaired loans, the Corporation assigns loss allocation factors to each respective loan type and delinquency status. See Note 6 for additional information.
Various other techniques are utilized to monitor indicators of credit deterioration in the portfolios of residential real estate mortgages and home equity lines and loans. Among these techniques is the periodic tracking of loans with an updated FICO score and an estimated loan to value (“LTV”) ratio. LTV is determined via statistical modeling analyses. The indicated LTV levels are estimated based on such factors as the location, the original LTV, and the date of origination of the loan and do not reflect actual appraisal amounts. The results of these analyses are taken into consideration in the determination of loss allocation factors for residential mortgage and home equity consumer credits. See Note 6 for additional information.
The following table presents the residential and consumer loan portfolios, segregated by category of credit quality indicator:
(Dollars in thousands)	Under 90 Days Past Due							Over 90 Days Past Due
	Jun 30,			Dec 31,				Jun 30,				Dec 31,
	2014			2013				2014				2013
Residential real estate:
Accruing mortgages		$838,770			$740,848				$—				$—
Nonaccrual mortgages	3,082			2,682				4,335				5,633
Homeowner construction	30,452			23,511				—				—
Total residential real estate loans		$872,304			$767,041				$4,335				$5,633
Consumer:
Home equity lines		$237,110			$231,093				$280				$269
Home equity loans	45,526			39,864				106				348
Other	55,167			55,262				126				39
Total consumer loans		$337,803			$326,219				$512				$656

Allowance_for_Loan_Losses

Allowance for Loan Losses	6 Months Ended
	Jun. 30, 2014
Receivables [Abstract]	'
Allowance for Loan Losses	'
	Allowance for Loan Losses
	The allowance for loan losses is management’s best estimate of inherent risk of loss in the loan portfolio as of the balance sheet date. The allowance is increased by provisions charged to earnings and by recoveries of amounts previously charged off, and is reduced by charge-offs on loans. The Corporation uses a methodology to systematically measure the amount of estimated loan loss exposure inherent in the loan portfolio for purposes of establishing a sufficient allowance for loan losses. The methodology includes three elements: (1) identification of loss allocations for individual loans deemed to be impaired, (2) loss allocation factors for non-impaired loans based on credit grade, historical loss experience, delinquency factors and other similar credit quality indicators, and (3) an unallocated allowance maintained for measurement imprecision and to reflect management’s consideration of other environmental factors.
	Periodic assessments and revisions to the loss allocation factors used in the assignment of loss exposure are made to appropriately reflect the analysis of migrational loss experience. The Corporation analyzes historical loss experience in the various portfolios over periods deemed to be relevant to the inherent risk of loss in the respective portfolios as of the balance sheet date. The Corporation adjusts the loss allocations for various factors it believes are not adequately presented in historical loss experience, including trends in real estate values, trends in rental rates on commercial real estate, trends in unemployment rates in primary markets, consideration of general economic conditions, and our assessments of credit risk associated with certain industries and an ongoing trend toward larger credit relationships. These factors are also evaluated taking into account the geographic location of the underlying loans. Revisions to loss allocation factors are not retroactively applied.
	Loss allocations for loans deemed to be impaired are measured on a discounted cash flow method based upon the loan’s contractual effective interest rate, or at the loan’s observable market price, or, if the loan is collateral dependent, at the fair value of the collateral. For collateral dependent loans for which repayment is dependent on the sale of the collateral, management adjusts the fair value for estimated costs to sell. For collateral dependent loans for which repayment is dependent on the operation of the collateral, such as accruing troubled debt restructured loans, estimated costs to sell are not incorporated into the measurement. Management may also adjust appraised values to reflect estimated market value declines or apply other discounts to appraised values for unobservable factors resulting from its knowledge of circumstances associated with the property.
	Loss allocation factors are used for non-impaired loans based on credit grade, historical loss experience, delinquency factors and other similar credit quality indicators. Individual commercial loans and commercial mortgage loans not deemed to be impaired are evaluated using the internal rating system described in Note 5 under the caption “Credit Quality Indicators” and the application of loss allocation factors. The loan rating system and the related loss allocation factors take into consideration parameters including the borrower’s financial condition, the borrower’s performance with respect to loan terms, and the adequacy of collateral. Portfolios of more homogeneous populations of loans, including the various categories of residential mortgages and consumer loans, are analyzed as groups, taking into account delinquency status and historical loss experience and other qualitative environmental factors for each type of credit product.
	An unallocated allowance is maintained to allow for measurement imprecision attributable to uncertainty in the economic environment and ever changing conditions and to reflect management’s consideration of qualitative and quantitative assessments of other environmental factors, including, but not limited to, conditions that may affect the collateral position such as environmental matters, regulatory changes affecting the foreclosure process, as well as conditions that may affect the ability of borrowers to meet debt service requirements.
	Because the methodology is based upon historical experience and trends, current economic data as well as management’s judgment, factors may arise that result in different estimations. Significant factors that could give rise to changes in these estimates may include, but are not limited to, changes in economic conditions in our market area, concentration of risk and declines in local property values. Adversely different conditions or assumptions could lead to increases in the allowance. In addition, various regulatory agencies periodically review the allowance for loan losses. Such agencies may require additions to the allowance based on their judgments about information available to them at the time of their examination.
	The following tables present the activity in the allowance for loan losses for the three months ended June 30, 2014 and 2013, respectively:
		Commercial
	(Dollars in thousands)	Mortgages			Construction		Other			Total Commercial			Residential			Consumer			Un-allocated			Total
	Beginning Balance		$6,547			$269		$5,201			$12,017			$5,087			$2,565			$7,374			$27,043
	Charge-offs	(32		)	—		(115		)	(147		)	(30		)	(90		)				(267		)
	Recoveries	6			—		20			26			—			17						43
	Provision	452			225		348			1,025			(217		)	77			(435		)	450
	Ending Balance		$6,973			$494		$5,454			$12,921			$4,840			$2,569			$6,939			$27,269
		Commercial
	(Dollars in thousands)	Mortgages			Construction		Other			Total Commercial			Residential			Consumer			Un-allocated			Total
	Beginning Balance		$9,607			$246		$5,966			$15,819			$4,533			$2,489			$8,298			$31,139
	Charge-offs	(4,000		)	—		(85		)	(4,085		)	(39		)	(51		)				(4,175		)
	Recoveries	186			—		22			208			3			9						220
	Provision	955			31		(461		)	525			194			8			(27		)	700
	Ending Balance		$6,748			$277		$5,442			$12,467			$4,691			$2,455			$8,271			$27,884
	The following tables present the activity in the allowance for loan losses for six months ended June 30, 2014 and 2013, respectively:
	(Dollars in thousands)	Commercial
		Mortgages			Construction		Other			Total Commercial			Residential			Consumer			Un-allocated			Total
	Beginning Balance		$6,969			$362		$5,433			$12,764			$4,700			$2,511			$7,911			$27,886
	Charge-offs	(977		)	—		(311		)	(1,288		)	(72		)	(130		)				(1,490		)
	Recoveries	12			—		46			58			35			30						123
	Provision	969			132		286			1,387			177			158			(972		)	750
	Ending Balance		$6,973			$494		$5,454			$12,921			$4,840			$2,569			$6,939			$27,269
	(Dollars in thousands)	Commercial
		Mortgages			Construction		Other			Total Commercial			Residential			Consumer			Un-allocated			Total
	Beginning Balance		$9,407			$224		$5,996			$15,627			$4,269			$2,684			$8,293			$30,873
	Charge-offs	(4,114		)	—		(178		)	(4,292		)	(48		)	(209		)				(4,549		)
	Recoveries	192			—		44			236			3			21						260
	Provision	1,263			53		(420		)	896			467			(41		)	(22		)	1,300
	Ending Balance		$6,748			$277		$5,442			$12,467			$4,691			$2,455			$8,271			$27,884
	The following table presents the Corporation’s loan portfolio and associated allowance for loan loss by portfolio segment and by impairment methodology:
	(Dollars in thousands)	June 30, 2014					December 31, 2013
		Loans			Related Allowance		Loans			Related Allowance
	Loans Individually Evaluated for Impairment:
	Commercial:
	Mortgages		$24,893			$747		$30,292			$552
	Construction & development	—			—		—			—
	Other	2,585			324		2,556			463
	Residential real estate	4,456			390		4,290			463
	Consumer	291			64		355			3
	Subtotal		$32,225			$1,525		$37,493			$1,481
	Loans Collectively Evaluated for Impairment:
	Commercial:
	Mortgages		$747,879			$6,226		$765,957			$6,417
	Construction & development	38,574			494		36,289			362
	Other	552,239			5,130		528,241			4,970
	Residential real estate	872,183			4,450		768,384			4,237
	Consumer	338,024			2,505		326,520			2,508
	Subtotal		$2,548,899			$18,805		$2,425,391			$18,494
	Unallocated	—			6,939		—			7,911
	Total		$2,581,124			$27,269		$2,462,884			$27,886

Time_Certificates_of_Deposit

Time Certificates of Deposit	6 Months Ended
	Jun. 30, 2014
Deposits [Abstract]	'
Time Certificates of Deposit	'
	Time Certificates of Deposit
	Time certificates of deposit amounted to $796.3 million and $790.8 million, respectively, at June 30, 2014 and December 31, 2013. These amounts included wholesale brokered time certificates of deposit of $171.2 million and $98.0 million, respectively, at June 30, 2014 and December 31, 2013. Wholesale brokered time deposits of $80.0 million were utilized as replacement funding for the prepayment of certain FHLBB advances in the first quarter of 2014. See Note 8.
	The following table presents scheduled maturities of time certificates of deposit outstanding at June 30, 2014:
	(Dollars in thousands)	Scheduled Maturity		Weighted Average Rate
	July 1, 2014 through December 31, 2014		$286,272	1.25	%
	2015	209,147		0.95	%
	2016	127,897		1.2	%
	2017	83,968		0.86	%
	2018	50,820		2.01	%
	Thereafter	38,151		0.49	%
	Balance at June 30, 2014		$796,255	1.13	%
	The following table presents the amount of time certificates of deposit in denominations of $100 thousand or more at June 30, 2014, maturing during the periods indicated:
	(Dollars in thousands)	Scheduled Maturity
	July 1, 2014 to September 30, 2014		$122,022
	October 1, 2014 to December 31, 2014	43,522
	January 1, 2015 to June 30, 2015	54,999
	July 1, 2015 and beyond	91,951
	Balance at June 30, 2014		$312,494

Borrowings

Borrowings	6 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Borrowings	'
	Borrowings
	Federal Home Loan Bank Advances
	Advances payable to the FHLBB amounted to $322.1 million and $288.1 million, respectively, at June 30, 2014 and December 31, 2013. The year-to-date increase in FHLBB advances was concentrated in the second quarter of 2014 as short-term advances were used primarily to fund loan growth. In addition, FHLBB advances totaling $99.3 million were prepaid in early March 2014, resulting in debt prepayment penalty expense of approximately $6.3 million. Other wholesale funding in the form of brokered time certificates of deposits as well as existing on balance sheet liquidity were utilized as the funding source for the prepayments. See Note 7.
	The following table presents maturities of FHLBB advances outstanding as of June 30, 2014:
	(Dollars in thousands)	Scheduled		Redeemed at		Weighted
		Maturity		Call Date (1)		Average Rate (2)
	July 1, 2014 to December 31, 2014		$135,759		$135,759	0.36	%
	2015	1,569		1,569		4.89	%
	2016	43,130		43,130		3.1	%
	2017	41,045		41,045		3.16	%
	2018	64,803		64,803		3.85	%
	2019 and after	35,750		35,750		4.5	%
	Balance at June 30, 2014		$322,056		$322,056	2.27	%
	-1	Callable FHLBB advances are shown in the respective periods assuming that the callable debt is redeemed at the call date while all other advances are shown in the periods corresponding to their scheduled maturity date.
	-2	Weighted average rate based on scheduled maturity dates.
	As of June 30, 2014, the Bank also has access to an unused line of credit with the FHLBB amounting to $20.0 million. In addition, the FHLBB has issued standby letters of credit to depositor customers of the Bank to collateralize public deposits. The Bank’s FHLBB borrowings, line of credit and letters of credit are collateralized by a blanket pledge agreement on the Bank’s FHLBB stock, certain qualified investment securities and loans, as well as amounts maintained on deposit at the FHLBB. The Bank’s unused remaining available borrowing capacity at the FHLBB was approximately $524.2 million and $564.1 million, respectively, at June 30, 2014 and December 31, 2013.

Shareholders_Equity

Shareholders' Equity	6 Months Ended
	Jun. 30, 2014
Regulatory Capital Requirements [Abstract]	'
Regulatory Capital Requirements	'
	-9	Shareholders’ Equity
	Regulatory Capital Requirements
	The following table presents the Corporation’s and the Bank’s actual capital amounts and ratios as well as the corresponding minimum and well capitalized regulatory amounts and ratios:
	(Dollars in thousands)	Actual				For Capital Adequacy Purposes				To Be “Well Capitalized” Under Prompt Corrective Action Provisions
		Amount		Ratio		Amount		Ratio		Amount		Ratio
	June 30, 2014
	Total Capital (to Risk-Weighted Assets):
	Corporation	$330,146		13.24	%	$199,489		8	%	$249,361		10	%
	Bank	$325,097		13.05	%	$199,343		8	%	$249,179		10	%
	Tier 1 Capital (to Risk-Weighted Assets):
	Corporation	$302,541		12.13	%	$99,744		4	%	$149,616		6	%
	Bank	$297,492		11.94	%	$99,671		4	%	$149,507		6	%
	Tier 1 Capital (to Average Assets): (1)
	Corporation	$302,541		9.62	%	$125,796		4	%	$157,245		5	%
	Bank	$297,492		9.47	%	$125,633		4	%	$157,041		5	%
	December 31, 2013
	Total Capital (to Risk-Weighted Assets):
	Corporation		$319,486	13.29	%		$192,306	8	%		$240,382	10	%
	Bank		$314,458	13.09	%		$192,147	8	%		$240,184	10	%
	Tier 1 Capital (to Risk-Weighted Assets):
	Corporation		$291,292	12.12	%		$96,153	4	%		$144,229	6	%
	Bank		$286,264	11.92	%		$96,074	4	%		$144,111	6	%
	Tier 1 Capital (to Average Assets): (1)
	Corporation		$291,292	9.41	%		$123,785	4	%		$154,732	5	%
	Bank		$286,264	9.26	%		$123,633	4	%		$154,541	5	%
	(1)    Leverage ratio

Derivative_Financial_Instrumen

Derivative Financial Instruments	6 Months Ended
	Jun. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivative Financial Instruments	'
	Derivative Financial Instruments
	The Corporation’s derivative financial instruments are used to manage differences in the amount, timing, and duration of the Corporation’s known or expected cash receipts and its known or expected cash payments principally to manage the Corporation’s interest rate risk. Additionally, the Corporation enters into interest rate derivatives to accommodate the business requirements of its customers. All derivatives are recognized as either assets or liabilities on the balance sheet and are measured at fair value.  The accounting for changes in the fair value of derivatives depends on the intended use of the derivative and resulting designation.
	Interest Rate Risk Management Agreements
	Interest rate swaps are used from time to time as part of the Corporation’s interest rate risk management strategy.  Swaps are agreements in which the Corporation and another party agree to exchange interest payments (e.g., fixed-rate for variable-rate payments) computed on a notional principal amount.  The credit risk associated with swap transactions is the risk of default by the counterparty.  To minimize this risk, the Corporation enters into interest rate agreements only with highly rated counterparties that management believes to be creditworthy.  The notional amounts of these agreements do not represent amounts exchanged by the parties and, thus, are not a measure of the potential loss exposure.
	Cash Flow Hedging Instruments
	As of June 30, 2014 and December 31, 2013, the Bancorp had two interest rate swap contracts designated as cash flow hedges to hedge the interest rate associated with $22.7 million of variable rate junior subordinated debentures. The effective portion of the changes in fair value of derivatives designated as cash flow hedges is recorded in other comprehensive income and subsequently reclassified to earnings when gains or losses are realized.  The ineffective portion of changes in fair value of the derivatives is recognized directly in earnings as interest expense.  The Bancorp has pledged collateral to derivative counterparties in the form of cash totaling $939 thousand at June 30, 2014 and $1.6 million at December 31, 2013.  The Bancorp may need to post additional collateral in the future in proportion to potential increases in unrealized loss positions.
	Customer Related Derivative Contracts
	The Corporation has entered into interest rate swap contracts to help commercial loan borrowers manage their interest rate risk.  The interest rate swap contracts with commercial loan borrowers allow them to convert floating-rate loan payments to fixed-rate loan payments.  When we enter into an interest rate swap contract with a commercial loan borrower, we simultaneously enter into a “mirror” swap contract with a third party.  The third party exchanges the client’s fixed-rate loan payments for floating-rate loan payments.  We retain the risk that is associated with the potential failure of counterparties and the risk inherent in originating loans.  As of June 30, 2014 and December 31, 2013, Washington Trust had interest rate swap contracts with commercial loan borrowers with notional amounts of $110.8 million and $105.6 million, respectively, and equal amounts of “mirror” swap contracts with third-party financial institutions.  These derivatives are not designated as hedges and therefore, changes in fair value are recognized in earnings.
	Loan Commitments
	Interest rate lock commitments are extended to borrowers that relate to the origination of residential real estate mortgage loans held for sale.  To mitigate the interest rate risk inherent in these rate locks, as well as closed residential real estate mortgage loans held for sale, best efforts forward commitments are established to sell individual residential real estate mortgage loans.  Both interest rate lock commitments and commitments to sell residential real estate mortgage loans are derivative financial instruments, but do not meet criteria for hedge accounting and as such are treated as derivatives not designated as hedging instruments. These derivative financial instruments are recorded at fair value and changes in fair value of these commitments are reflected in earnings in the period of change. The Corporation has elected to carry newly originated closed residential real estate mortgage loans held for sale at fair value, as changes in fair value in these loans held for sale generally offset changes in interest rate lock and forward sale commitments.
	The following table presents the fair values of derivative instruments in the Corporation’s Consolidated Balance Sheets as of the dates indicated:
	(Dollars in thousands)	Asset Derivatives										Liability Derivatives
				Fair Value										Fair Value
		Balance Sheet Location		Jun 30, 2014				Dec 31, 2013				Balance Sheet Location		Jun 30, 2014				Dec 31, 2013
	Derivatives Designated as Cash Flow Hedging Instruments:
	Interest rate risk management contracts:
	Interest rate swap contracts	Other assets			$—				$—			Other liabilities			$773				$1,012
	Derivatives not Designated as Hedging Instruments:
	Forward loan commitments:
	Interest rate lock commitments	Other assets		998				392				Other liabilities		3				—
	Commitments to sell mortgage loans	Other assets		16				10				Other liabilities		1,655				583
	Customer related derivative contracts:
	Interest rate swaps with customers	Other assets		3,046				2,403				Other liabilities		101				297
	Mirror swaps with counterparties	Other assets		113				330				Other liabilities		3,125				2,406
	Total				$4,173				$3,135						$5,657				$4,298
	The following tables present the effect of derivative instruments in the Corporation’s Consolidated Statements of Income and Changes in Shareholders’ Equity for the periods indicated:
	(Dollars in thousands)	Gain (Loss) Recognized in Other Comprehensive Income (Effective Portion)																Location of Gain (Loss) Recognized in Income (Ineffective Portion and Amount Excluded from Effectiveness Testing)		Gain (Loss) Recognized in Income (Ineffective Portion)
		Three months								Six months										Three months				Six months
	Periods ended June 30,	2014				2013				2014				2013						2014		2013		2014		2013
	Derivatives Designated as Cash Flow Hedging Instruments:
	Interest rate risk management contracts:
	Interest rate swap contracts		$79				$152				$155				$272			Interest Expense			$—		$—		$—		$—
	Total		$79				$152				$155				$272						$—		$—		$—		$—
	(Dollars in thousands)		Amount of Gain (Loss) Recognized in Income
		Statement of Income Location	Three months								Six months
	Periods ended June 30,		2014				2013				2014				2013
	Derivatives not Designated as Hedging Instruments:
	Forward loan commitments:
	Interest rate lock commitments	Net gains on loan sales & commissions on loans originated for others		$326				($855	)			$603				($1,773	)
	Commitments to sell mortgage loans	Net gains on loan sales & commissions on loans originated for others	(753		)		1,753				(1,066		)		3,724
	Customer related derivative contracts:
	Interest rate swaps with customers	Net gains (losses) on interest rate swaps	1,120				(407		)		2,150				(411		)
	Mirror swaps with counterparties	Net gains (losses) on interest rate swaps	(1,157		)		559				(1,927		)		582
	Total			($464	)			$1,050				($240	)			$2,122

Fair_Value_Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	Fair Value Measurements
	The Corporation uses fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures.  As of June 30, 2014 and December 31, 2013, securities available for sale, residential real estate mortgage loans held for sale and derivatives were recorded at fair value on a recurring basis.  Additionally, from time to time, we may be required to record at fair value other assets on a nonrecurring basis, such as collateral dependent impaired loans, property acquired through foreclosure or repossession and mortgage servicing rights.  These nonrecurring fair value adjustments typically involve the application of lower of cost or market accounting or write-downs of individual assets.
	Fair value is a market-based measurement, not an entity-specific measurement.  Fair value measurements are determined based on the assumptions the market participants would use in pricing the asset or liability.  In addition, GAAP specifies a hierarchy of valuation techniques based on whether the types of valuation information (“inputs”) are observable or unobservable.  Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect the Corporation’s market assumptions.  These two types of inputs have created the following fair value hierarchy:
	•	Level 1 – Quoted prices for identical assets or liabilities in active markets.
	•	Level 2 – Quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in inactive markets; and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets.
	•	Level 3 – Valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable in the markets and which reflect the Corporation’s market assumptions.
	Fair Value Option Election
	GAAP allows for the irrevocable option to elect fair value accounting for the initial and subsequent measurement for certain financial assets and liabilities on a contract-by-contract basis. The Corporation elected the fair value option for its portfolio of residential real estate mortgage loans held for sale to reduce certain timing differences and better match changes in fair value of the loans with changes in the fair value of the derivative loan sale contracts use to economically hedge them.
	The aggregate principal amount of the residential real estate mortgage loans held for sale was $21.8 million and $11.5 million, respectively, at June 30, 2014 and December 31, 2013. The aggregate fair value of these loans as of the same dates was $22.4 million and $11.6 million, respectively. As of June 30, 2014 and December 31, 2013, the aggregate fair value of residential real estate mortgage loans held for sale exceeded the aggregate principal amount by $644 thousand and $181 thousand, respectively.
	There were no residential real estate mortgage loans held for sale 90 days or more past due at June 30, 2014 and December 31, 2013.
	The following table presents the changes in fair value related to mortgage loans held for sale, interest rate lock commitments and commitments to sell residential real estate mortgage loans for the periods indicated. Changes in fair values are reported as a component of net gains on loan sales and commissions on loans originated for others in the Consolidated Statements of Income.
	(Dollars in thousands)
		Three Months							Six months
	Periods ended June 30,	2014			2013				2014				2013
	Mortgage loans held for sale		$387			($898	)			$463				($1,959	)
	Interest rate lock commitments	326			(855		)		603				(1,773		)
	Commitments to sell	(753		)	1,753				(1,066		)		3,724
	Total changes in fair value		($40	)		$—				$—				($8	)
	Items Measured at Fair Value on a Recurring Basis
	Securities available for sale are recorded at fair value on a recurring basis.  When available, the Corporation uses quoted market prices to determine the fair value of securities; such items are classified as Level 1. There were no Level 1 securities held at June 30, 2014 and December 31, 2013.
	Level 2 securities include debt securities with quoted prices, which are traded less frequently than exchange-traded instruments, whose value is determined using matrix pricing with inputs that are observable in the market or can be derived principally from or corroborated by observable market data.  This category generally includes obligations of U.S. government-sponsored enterprises, mortgage-backed securities issued by U.S. government agencies and U.S government-sponsored enterprises, obligations of state and political subdivisions, trust preferred debt securities and corporate bonds.
	Securities not actively traded whose fair value is determined through the use of cash flows utilizing inputs that are unobservable are classified as Level 3. There were no such securities held at June 30, 2014 and December 31, 2013.
	Mortgage Loans Held for Sale
	The fair values of mortgage loans held for sale are generally estimated based on secondary market rates offered for loans with similar characteristics. When secondary market information exists, these loans are classified as Level 2. In certain cases when quoted market prices are not available, fair value is determined by utilizing a discounted cash flow analysis and these assets are classified as Level 3. Any changes in the valuation of mortgage loans held for sale is based upon the change in market interest rates between closing the loan and the measurement date and an immaterial portion attributable to changes in instrument-specific credit risk. There were no level 3 mortgage loans held for sale held at June 30, 2014 and December 31, 2013.
	Derivatives
	Interest rate swap contracts are traded in over-the-counter markets where quoted market prices are not readily available.  Fair value measurements are determined using independent pricing models that utilize primarily market observable inputs, such as swap rates of different maturities and LIBOR rates and, accordingly, are classified as Level 2. Our internal review procedures have confirmed that the fair values determined with independent pricing models and utilized by the Corporation are consistent with GAAP. For purposes of potential valuation adjustments to its interest rate swap contracts, the Corporation evaluates the credit risk of its counterparties as well as that of the Corporation.  Accordingly, Washington Trust considers factors such as the likelihood of default by the Corporation and its counterparties, its net exposures and remaining contractual life, among other factors, in determining if any fair value adjustments related to credit risk are required.  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. Additionally, in accordance with fair value measurement guidance in ASU 2011-04, Washington Trust has made an accounting policy election to measure the credit risk of its derivative financial instruments that are subject to master netting agreements on a net basis by counterparty portfolio.
	Level 2 fair value measurements of forward loan commitments (interest rate lock commitments and commitments to sell residential real estate mortgages) are estimated using the anticipated market price based on pricing indications provided from syndicate banks. In certain cases when quoted market prices are not available, fair value is determined by utilizing a discounted cash flow analysis and these assets are classified as Level 3. There were no level 3 forward loan commitments held at June 30, 2014 and December 31, 2013.
	Items Measured at Fair Value on a Nonrecurring Basis
	Collateral Dependent Impaired Loans
	Collateral dependent loans that are deemed to be impaired are valued based upon the fair value of the underlying collateral.  Such collateral primarily consists of real estate and, to a lesser extent, other business assets.  For collateral dependent loans for which repayment is dependent on the sale of the collateral, management adjusts the fair value for estimated costs to sell. For collateral dependent loans for which repayment is dependent on the operation of the collateral, such as accruing troubled debt restructured loans, estimated costs to sell are not incorporated into the measurement. Management may also adjust appraised values to reflect estimated market value declines or apply other discounts to appraised values resulting from its knowledge of the property.  Internal valuations are utilized to determine the fair value of other business assets.  Collateral dependent impaired loans are categorized as Level 3.
	Property Acquired Through Foreclosure or Repossession
	Property acquired through foreclosure or repossession included in other assets in the Consolidated Balance Sheets is adjusted to fair value less costs to sell upon transfer out of loans through a charge to the allowance for loan losses.  Subsequently, it is carried at the lower of carrying value or fair value less costs to sell. Such subsequent valuation charges are charged through earnings.  Fair value is generally based upon appraised values of the collateral.  Management may adjust appraised values to reflect estimated market value declines or apply other discounts to appraised values for unobservable factors resulting from its knowledge of the property, and such property is categorized as Level 3.
	Items Recorded at Fair Value on a Recurring Basis
	The tables below present the balances of assets and liabilities reported at fair value on a recurring basis:
	(Dollars in thousands)												Assets/Liabilities at Fair Value
		Fair Value Measurements Using
	June 30, 2014	Level 1			Level 2				Level 3
	Assets:
	Securities available for sale:
	Obligations of U.S. government-sponsored enterprises		$—			$10,012				$—				$10,012
	Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises	—			228,285				—				228,285
	Obligations of states and political subdivisions	—			56,391				—				56,391
	Individual name issuer trust preferred debt securities	—			26,635				—				26,635
	Corporate bonds	—			6,255				—				6,255
	Mortgage loans held for sale	—			22,407				—				22,407
	Derivative assets (1):
	Interest rate swap contracts with customers	—			3,159				—				3,159
	Forward loan commitments	—			1,014				—				1,014
	Total assets at fair value on a recurring basis		$—			$354,158				$—				$354,158
	Liabilities:
	Derivative liabilities (1):
	Mirror swap contracts with counterparties		$—			$3,226				$—				$3,226
	Interest rate risk management swap contracts	—			773				—				773
	Forward loan commitments	—			1,658				—				1,658
	Total liabilities at fair value on a recurring basis		$—			$5,657				$—				$5,657
	-1	Derivative assets are included in other assets and derivative liabilities are reported in other liabilities in the Consolidated Balance Sheets.
	(Dollars in thousands)												Assets/Liabilities at Fair Value
		Fair Value Measurements Using
	December 31, 2013	Level 1			Level 2				Level 3
	Assets:
	Securities available for sale:
	Obligations of U.S. government-sponsored enterprises		$—			$55,115				$—				$55,115
	Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises	—			238,355				—				238,355
Obligations of states and political subdivisions	—			62,859				—				62,859
Individual name issuer trust preferred debt securities	—			24,684				—				24,684
Pooled trust preferred debt securities	—			547				—				547
Corporate bonds	—			11,343				—				11,343
Mortgage loans held for sale	—			11,636				—				11,636
Derivative assets (1):
Interest rate swap contracts with customers	—			2,733				—				2,733
Forward loan commitments	—			402				—				402
Total assets at fair value on a recurring basis		$—			$407,674				$—				$407,674
Liabilities:
Derivative liabilities (1):
Mirror swap contracts with counterparties		$—			$2,703				$—				$2,703
Interest rate risk management swap contracts	—			1,012				—				1,012
Forward loan commitments	—			583				—				583
Total liabilities at fair value on a recurring basis		$—			$4,298				$—				$4,298
-1	Derivative assets are included in other assets and derivative liabilities are reported in other liabilities in the Consolidated Balance Sheets.
It is the Corporation’s policy to review and reflect transfers between Levels as of the financial statement reporting date.  During the six months ended June 30, 2014 and 2013, there were no transfers in and/or out of Level 1, 2 or 3.
There were no Level 3 assets and liabilities measured at fair value on a recurring basis during the three and six months ended June 30, 2014.
The following tables present the changes in Level 3 assets and liabilities measured at fair value on a recurring basis during the periods indicated.
Three months ended June 30,	2013
(Dollars in thousands)	Securities Available for Sale (1)			Mortgage Loans Held for Sale (2)				Derivative Assets / (Liabilities) (3)				Total
Balance at beginning of period		$404		7,955					$48				$8,407
Gains and losses (realized and unrealized):
Included in earnings (4)	—			48				(48		)		—
Included in other comprehensive income	(7		)	—				—				(7		)
Purchases	—			—				—				—
Issuances	—			(5,176		)		—				(5,176		)
Sales	—			(2,827		)		—				(2,827		)
Settlements	—			—				—				—
Transfers into Level 3	—			—				—				—
Transfers out of Level 3	—			—				—				—
Balance at end of period		$397			$—				$—				$397
Six months ended June 30,	2013
(Dollars in thousands)	Securities Available for Sale (1)			Mortgage Loans Held for Sale (2)			Derivative Assets / (Liabilities) (3)				Total
Balance at beginning of period		$843		9,813				($142	)			$10,514
Gains and losses (realized and unrealized):
Included in earnings (4)	(2,772		)	(150	)		142				(2,780		)
Included in other comprehensive income	2,459			—			—				2,459
Purchases	—			—			—				—
Issuances	—			12,692			—				12,692
Sales	—			(22,355	)		—				(22,355		)
Settlements	(133		)	—			—				(133		)
Transfers into Level 3	—			—			—				—
Transfers out of Level 3	—			—			—				—
Balance at end of period		$397		—				$—				$397
-1	Level 3 securities available for sale were comprised of pooled trust preferred debt securities in the form of collateralized debt obligations.
-2	Level 3 mortgage loans held for sale consisted of certain mortgage loans whose fair value was determined utilizing a discounted cash flow analysis.
-3	Level 3 derivative assets / liabilities consisted of forward loan commitments (interest rate lock commitments and commitments to sell residential real estate mortgages) whose fair value was determined utilizing a discounted cash flow analysis.
-4	Losses included in earnings for Level 3 securities available for sale were included in net impairment losses recognized in earnings in the Consolidated Income Statement. Losses included in earnings for Level 3 mortgage loans held for sale and derivative assets and liabilities were included in net gains on loan sales and commissions on loans originated for others in the Consolidated Statements of Income.
Items Recorded at Fair Value on a Nonrecurring Basis
Certain assets are measured at fair value on a nonrecurring basis in accordance with GAAP.  These adjustments to fair value usually result from the application of lower of cost or market accounting or write-downs of individual assets.  The valuation methodologies used to measure these fair value adjustments are described above.
The following table summarizes such assets, which were written down to fair value during the six months ended June 30, 2014:
(Dollars in thousands)	June 30, 2014
	Level 1			Level 2				Level 3				Total
Collateral dependent impaired loans		$—			$—				$6,643				$6,643
Property acquired through foreclosure or repossession	—			—				492				492
Total assets at fair value on a nonrecurring basis		$—			$—				$7,135				$7,135
The allowance for loan losses on collateral dependent impaired loans amounted to $912 thousand at June 30, 2014.
The following table summarizes such assets, which were written down to fair value during the year ended December 31, 2013:
(Dollars in thousands)	December 31, 2013
	Level 1			Level 2				Level 3				Total
Collateral dependent impaired loans		$—			$—				$11,177				$11,177
Property acquired through foreclosure or repossession	—			—				435				435
Total assets at fair value on a nonrecurring basis		$—			$—				$11,612				$11,612
The allowance for loan losses allocation on collateral dependent impaired loans amounted to $453 thousand at December 31, 2013.
The following tables present additional quantitative information about assets measured at fair value on a nonrecurring basis for which the Corporation has utilized Level 3 inputs to determine fair value for the dates indicated.
(Dollars in thousands)	June 30, 2014
	Fair Value			Valuation Technique		Unobservable Input	Range of Inputs Utilized (Weighted Average)
Collateral dependent impaired loans		$6,643		Appraisals of collateral		Discount for costs to sell	10% - 25% (11%)
						Appraisal adjustments (1)	0% - 40% (5%)
Property acquired through foreclosure or repossession		$492		Appraisals of collateral		Discount for costs to sell	0% - 10% (7%)
						Appraisal adjustments (1)	9% - 22% (15%)
(Dollars in thousands)	December 31, 2013
	Fair Value			Valuation Technique		Unobservable Input	Range of Inputs Utilized (Weighted Average)
Collateral dependent impaired loans		$11,177		Appraisals of collateral		Discount for costs to sell	1% - 45% (11%)
						Appraisal adjustments (1)	0% - 50% (2%)
Property acquired through foreclosure or repossession		$435		Appraisals of collateral		Discount for costs to sell	2% - 10% (9%)
						Appraisal adjustments (1)	0% - 22% (13%)
-1	Management may adjust appraisal values to reflect market value declines or other discounts resulting from its knowledge of the property.
Valuation of Other Financial Instruments
The methodologies for estimating the fair value of financial instruments that are measured at fair value on a recurring or nonrecurring basis are discussed above. The methodologies for other financial instruments are discussed below.
Loans
Fair values are estimated for categories of loans with similar financial characteristics. Loans are segregated by type and are then further segmented into fixed-rate and adjustable-rate interest terms to determine their fair value. The fair value of fixed-rate commercial and consumer loans is calculated by discounting scheduled cash flows through the estimated maturity of the loan using interest rates offered at June 30, 2014 and December 31, 2013 that reflect the credit and interest rate risk inherent in the loan. The estimate of maturity is based on the Corporation’s historical repayment experience. For residential mortgages, fair value is estimated by using market prices for sales of similar loans on the secondary market. The fair value of floating rate commercial and consumer loans approximates carrying value. Fair value for impaired loans is estimated using a discounted cash flow method based upon the loan’s contractual effective interest rate, or at the loan’s observable market price, or if the loan is collateral dependent, at the fair value of the collateral. Loans are classified within Level 3 of the fair value hierarchy.
Time Deposits
The discounted values of cash flows using the rates currently offered for deposits of similar remaining maturities were used to estimate the fair value of time deposits. Time deposits are classified within Level 2 of the fair value hierarchy.
Federal Home Loan Bank Advances
Rates currently available to the Corporation for advances with similar terms and remaining maturities are used to estimate fair value of existing advances. FHLBB advances are categorized as Level 2.
Junior Subordinated Debentures
The fair value of the junior subordinated debentures is estimated using rates currently available to the Corporation for debentures with similar terms and maturities. Junior subordinated debentures are categorized as Level 2.
The following tables present the carrying amount, estimated fair value and placement in the fair value hierarchy of the Corporation’s financial instruments. The tables exclude financial instruments for which the carrying value approximates fair value. Financial assets for which the fair value approximates carrying value include cash and cash equivalents, FHLBB stock, accrued interest receivable and bank-owned life insurance. Financial liabilities for which the fair value approximates carrying value include non-maturity deposits and accrued interest payable.
(Dollars in thousands)								Fair Value Measurements
June 30, 2014	Carrying Amount			Estimated Fair Value				Level 1				Level 2			Level 3
Financial Assets:
Securities held to maturity		$27,814			$28,618				$—				$28,618			$—
Loans, net of allowance for loan losses	2,553,855			2,604,038				—				—			2,604,038
Loan servicing rights	2,868			3,188				—				—			3,188
Financial Liabilities:
Time deposits		$796,255			$798,437				$—				$798,437			$—
FHLBB advances	322,056			337,519				—				337,519			—
Junior subordinated debentures	22,681			17,704				—				17,704			—
(Dollars in thousands)								Fair Value Measurements
December 31, 2013	Carrying Amount			Estimated Fair Value				Level 1				Level 2			Level 3
Financial Assets:
Securities held to maturity		$29,905			$29,865				$—				$29,865			$—
Loans, net of allowance for loan losses	2,434,998			2,479,527				—				—			2,479,527
Loan servicing rights	2,698			2,767				—				—			2,767
Financial Liabilities:
Time deposits		$790,762			$797,748				$—				$797,748			$—
FHLBB advances	288,082			308,317				—				308,317			—
Junior subordinated debentures	22,681			16,282				—				16,282			—

Defined_Benefit_Pension_Plans

Defined Benefit Pension Plans	6 Months Ended
	Jun. 30, 2014
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]	'
Defined Benefit Pension Plans	'
		Defined Benefit Pension Plans
	The Corporation maintains a tax-qualified defined benefit pension plan for the benefit of certain eligible employees who were hired prior to October 1, 2007. The Corporation also has non-qualified retirement plans to provide supplemental retirement benefits to certain employees, as defined in the plans.  The supplemental retirement plans provide eligible participants with an additional retirement benefit. In September 2013, the Corporation amended its defined benefit pension plans primarily to freeze benefit accruals after a ten-year transition period ending in December 2023.
	The composition of net periodic benefit cost was as follows for the periods indicated:
	(Dollars in thousands)	Qualified Pension Plan												Non-Qualified Retirement Plans
		Three months						Six months						Three months				Six months
	Periods ended June 30,	2014			2013			2014			2013			2014		2013		2014		2013
	Service cost		$538			$731			$1,076			$1,461			$11		$49		$23		$99
	Interest cost	722			719			1,445			1,438			119		115		239		230
	Expected return on plan assets	(1,015		)	(924		)	(2,031		)	(1,849		)	—		—		—		—
	Amortization of prior service cost	(5		)	(9		)	(11		)	(17		)	—		—		—		—
	Recognized net actuarial loss	115			414			230			828			19		49		35		98
	Net periodic benefit cost		$355			$931			$709			$1,861			$149		$213		$297		$427
	The pension plan is funded on a current basis, in compliance with the requirements of ERISA.

ShareBased_Compensation_Arrang

Share-Based Compensation Arrangements	6 Months Ended
	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Share-Based Compensation Arrangements	'
	Share-Based Compensation Arrangements
	During the six months ended June 30, 2014, the Corporation granted to non-employee directors 5,880 nonvested share units with three-year cliff vesting. The nonvested share units awarded were valued at the fair market value as of the award date, or $36.12.
	During the six months ended June 30, 2014, performance share awards were granted to certain executive officers providing the opportunity to earn shares of common stock of the Corporation. The performance shares awarded were valued at the fair market value as of the award date, or $34.66 and will be earned over a three-year performance period. The number of shares earned will range from zero to 200% of the target number of shares dependent upon the Corporation’s core return on equity and core earnings per share growth ranking compared to an industry peer group. The current assumption based on the most recent peer group information available results in shares earned at 140% of the target, or 21,140 shares.

Business_Segments

Business Segments	6 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
Business Segments	'
	Business Segments
	Washington Trust segregates financial information in assessing its results among its Commercial Banking and Wealth Management Services operating segments.  The amounts in the Corporate column include activity not related to the segments, such as the investment securities portfolio, wholesale funding activities and administrative units.  The Corporate column is not considered to be an operating segment.  The methodologies and organizational hierarchies that define the business segments are periodically reviewed and revised.  Results may be restated, when necessary, to reflect changes in organizational structure or allocation methodology. Any changes in estimates and allocations that may affect the reported results of any business segment will not affect the consolidated financial position or results of operations of Washington Trust as a whole.
	Management uses certain methodologies to allocate income and expenses to the business lines.  A funds transfer pricing methodology is used to assign interest income and interest expense to each interest-earning asset and interest-bearing liability on a matched maturity funding basis.  Certain indirect expenses are allocated to segments.  These include support unit expenses such as technology and processing operations and other support functions.
	Commercial Banking
	The Commercial Banking segment includes commercial, commercial real estate, residential and consumer lending activities; equity in losses of unconsolidated investments in real estate limited partnerships; mortgage banking, secondary market and loan servicing activities; deposit generation; merchant credit card services; cash management activities; and direct banking activities, which include the operation of ATMs, telephone and Internet banking services and customer support and sales.
	Wealth Management Services
	Wealth Management Services includes asset management services provided for individuals, institutions and mutual funds; personal trust services, including services as executor, trustee, administrator, custodian and guardian; institutional trust services, including services as trustee for pension and profit sharing plans; and other financial planning and advisory services.
	Corporate
	Corporate includes the Treasury Unit, which is responsible for managing the wholesale investment portfolio and wholesale funding needs.  It also includes income from bank-owned life insurance, net gain on sale of business line as well as administrative and executive expenses not allocated to the operating segments and the residual impact of methodology allocations such as funds transfer pricing offsets.
	The following table presents the statement of operations and total assets for Washington Trust’s reportable segments:
	(Dollars in thousands)	Commercial Banking				Wealth Management Services					Corporate					Consolidated Total
	Three months ended June 30,	2014		2013		2014			2013		2014		2013			2014		2013
	Net interest income (expense)		$19,799		$19,731		($7	)		$2		$4,676		$2,676			$24,468		$22,409
	Provision for loan losses	450		700		—			—		—		—			450		700
	Net interest income (expense) after provision for loan losses	19,349		19,031		(7		)	2		4,676		2,676			24,018		21,709
	Noninterest income	3,860		7,991		8,530			7,912		424		491			12,814		16,394
	Noninterest expenses:
	Depreciation and amortization expense	621		624		272			325		52		54			945		1,003
	Other noninterest expenses	13,219		16,268		5,482			5,022		2,802		2,712			21,503		24,002
	Total noninterest expenses	13,840		16,892		5,754			5,347		2,854		2,766			22,448		25,005
	Income before income taxes	9,369		10,130		2,769			2,567		2,246		401			14,384		13,098
	Income tax expense (benefit)	3,102		3,402		1,018			949		467		(236		)	4,587		4,115
	Net income		$6,267		$6,728		$1,751			$1,618		$1,779		$637			$9,797		$8,983
	Total assets at period end		$2,704,109		$2,509,407		$53,303			$52,129		$559,610		$499,771			$3,317,022		$3,061,307
	Expenditures for long-lived assets		$1,308		$367		$65			$28		$17		$15			$1,390		$410
	(Dollars in thousands)	Commercial Banking				Wealth Management Services					Corporate					Consolidated Total
	Six months ended June 30,	2014		2013		2014			2013		2014		2013			2014		2013
	Net interest income (expense)		$39,538		$39,242		($11	)		$9		$8,777		$5,625			$48,304		$44,876
	Provision for loan losses	750		1,300		—			—		—		—			750		1,300
	Net interest income (expense) after provision for loan losses	38,788		37,942		(11		)	9		8,777		5,625			47,554		43,576
	Noninterest income (expense)	8,401		15,937		16,595			15,386		7,188		(1,763		)	32,184		29,560
	Noninterest expenses:
	Depreciation and amortization expense	1,206		1,262		583			652		103		109			1,892		2,023
	Other noninterest expenses	26,772		31,404		10,869			10,134		12,207		5,628			49,848		47,166
	Total noninterest expenses	27,978		32,666		11,452			10,786		12,310		5,737			51,740		49,189
	Income (loss) before income taxes	19,211		21,213		5,132			4,609		3,655		(1,875		)	27,998		23,947
	Income tax expense (benefit)	6,363		7,898		1,894			1,815		646		(2,170		)	8,903		7,543
	Net income (loss)		$12,848		$13,315		$3,238			$2,794		$3,009		$295			$19,095		$16,404
	Total assets at period end		$2,704,109		$2,509,407		$53,303			$52,129		$559,610		$499,771			$3,317,022		$3,061,307
	Expenditures for long-lived assets		$2,383		$737		$236			$54		$62		$46			$2,681		$837

Other_Comprehensive_Income

Other Comprehensive Income	6 Months Ended
	Jun. 30, 2014
Equity [Abstract]	'
Other Comprehensive Income	'
	Other Comprehensive Income
	The following tables present the activity in other comprehensive income for the periods indicated:
	Three months ended June 30,	2014										2013
	(Dollars in thousands)	Pre-tax Amounts			Income Taxes			Net of Tax				Pre-tax Amounts			Income Taxes			Net of Tax
	Securities available for sale:
	Changes in fair value of securities available for sale		$2,837			$1,020			$1,817				($5,958	)		($2,137	)		($3,821	)
	Net losses (gains) on securities reclassified into earnings (1)	—			—			—				—			—			—
	Net change in fair value of securities available for sale	2,837			1,020			1,817				(5,958		)	(2,137		)	(3,821		)
	Reclassification adjustment for other-than-temporary impairment losses transferred into earnings (2)	—			—			—				—			—			—
	Cash flow hedges:
	Change in fair value of cash flow hedges	19			33			(14		)		52			18			34
	Net cash flow hedge losses reclassified into earnings (3)	145			52			93				184			66			118
	Net change in fair value of cash flow hedges	164			85			79				236			84			152
	Defined benefit plan obligation adjustment (4)	127			46			81				454			162			292
	Total other comprehensive income (loss)		$3,128			$1,151			$1,977				($5,268	)		($1,891	)		($3,377	)
	Six months ended June 30,	2014										2013
	(Dollars in thousands)	Pre-tax Amounts			Income Taxes			Net of Tax				Pre-tax Amounts			Income Taxes			Net of Tax
	Securities available for sale:
	Changes in fair value of securities available for sale		$3,801			$1,372			$2,429				($7,569	)		($2,695	)		($4,874	)
	Net losses on securities reclassified into earnings (1)	—			—			—				613			220			393
	Net change in fair value of securities available for sale	3,801			1,372			2,429				(6,956		)	(2,475		)	(4,481		)
	Reclassification adjustment for other-than-temporary impairment losses transferred into earnings (2)	—			—			—				2,159			775			1,384
	Cash flow hedges:
	Change in fair value of cash flow hedges	(24		)	6			(30		)		45			13			32
	Net cash flow hedge losses reclassified into earnings (3)	290			105			185				374			134			240
	Net change in fair value of cash flow hedges	266			111			155				419			147			272
	Defined benefit plan obligation adjustment (4)	254			85			169				909			280			629
	Total other comprehensive income (loss)		$4,321			$1,568			$2,753				($3,469	)		($1,273	)		($2,196	)
	-1	Reported as total other-than-temporary impairment losses on securities in the Consolidated Statements of Income.
	-2	Reported as the portion of loss recognized in other comprehensive income in the Consolidated Statements of Income.
	-3	Included in interest expense on junior subordinated debentures in the Consolidated Statements of Income.
	-4	Included in salaries and employee benefits expense in the Consolidated Statements of Income.
	The following table presents the changes in accumulated other comprehensive income (loss) by component, net of tax, for the six months ended June 30, 2014:
	(Dollars in thousands)	Net Unrealized Gains on Available For Sale Securities				Noncredit -related Impairment				Net Unrealized Losses on Cash Flow Hedges				Pension Benefit Adjustment				Total
	Balance at December 31, 2013		$3,089				$112				($618	)			($4,136	)			($1,553	)
	Other comprehensive income (loss) before reclassifications	2,429				—				(30		)		—				2,399
	Amounts reclassified from accumulated other comprehensive income	—				—				185				169				354
	Net other comprehensive income	2,429				—				155				169				2,753
	Balance at June 30, 2014		$5,518				$112				($463	)			($3,967	)			$1,200
	The following table presents the changes in accumulated other comprehensive income (loss) by component, net of tax, for the six months ended June 30, 2013:
	(Dollars in thousands)	Net Unrealized Gains on Available For Sale Securities				Noncredit -related Impairment				Net Unrealized Losses on Cash Flow Hedges				Pension Benefit Adjustment				Total
	Balance at December 31, 2012		$9,711				($1,938	)			($1,006	)			($17,266	)			($10,499	)
	Other comprehensive income (loss) before reclassifications	(4,874		)		—				32				—				(4,842		)
	Amounts reclassified from accumulated other comprehensive income	393				1,384				240				629				2,646
	Net other comprehensive (loss) income	(4,481		)		1,384				272				629				(2,196		)
	Balance at June 30, 2013		$5,230				($554	)			($734	)			($16,637	)			($12,695	)

Earnings_Per_Common_Share

Earnings Per Common Share	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Earnings Per Common Share	'
	Earnings Per Common Share
	Washington Trust utilizes the two-class method earnings allocation formula to determine earnings per share of each class of stock according to dividends and participation rights in undistributed earnings.  Share-based payments that entitle holders to receive non-forfeitable dividends before vesting are considered participating securities and included in earnings allocation for computing basic earnings per share under this method.  Undistributed income is allocated to common shareholders and participating securities under the two-class method based upon the proportion of each to the total weighted average shares available.
	The calculation of earnings per common share is presented below.
	(Dollars and shares in thousands, except per share amounts)
		Three Months						Six months
	Periods ended June 30,	2014			2013			2014			2013
	Net income		$9,797			$8,983			$19,095			$16,404
	Less dividends and undistributed earnings allocated to participating securities	(33		)	(39		)	(74		)	(78		)
	Net income applicable to common shareholders		$9,764			$8,944			$19,021			$16,326
	Weighted average basic common shares	16,678			16,454			16,653			16,428
	Dilutive effect of common stock equivalents	153			127			164			130
	Weighted average diluted common shares	16,831			16,581			16,817			16,558
	Earnings per common share:
	Basic		$0.59			$0.54			$1.14			$0.99
	Diluted		$0.58			$0.54			$1.13			$0.99
	Weighted average common stock equivalents, not included in common stock equivalents above because they were anti-dilutive, were 55 thousand and 241 thousand, respectively, for the three months ended June 30, 2014 and 2013. These amounts were 55 thousand and 394 thousand, respectively, for the six months ended June 30, 2014 and 2013.

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	Commitments and Contingencies
	Financial Instruments with Off-Balance Sheet Risk
	The Corporation is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers and to manage the Corporation’s exposure to fluctuations in interest rates.  These financial instruments include commitments to extend credit, standby letters of credit, interest rate swap agreements and interest rate lock commitments and commitments to sell residential real estate mortgage loans.  These instruments involve, to varying degrees, elements of credit risk in excess of the amount recognized in the Corporation’s Consolidated Balance Sheets.  The contract or notional amounts of these instruments reflect the extent of involvement the Corporation has in particular classes of financial instruments.  The Corporation’s credit policies with respect to interest rate swap agreements with commercial borrowers, commitments to extend credit, and financial guarantees are similar to those used for loans.  The interest rate swaps with other counterparties are generally subject to bilateral collateralization terms.
	The contractual and notional amounts of financial instruments with off-balance sheet risk are as follows:
	(Dollars in thousands)	Jun 30,		Dec 31,
		2014		2013
	Financial instruments whose contract amounts represent credit risk:
	Commitments to extend credit:
	Commercial loans		$319,422		$259,061
	Home equity lines	198,343		198,432
	Other loans	47,827		35,175
	Standby letters of credit	3,147		1,363
	Financial instruments whose notional amounts exceed the amount of credit risk:
	Forward loan commitments:
	Interest rate lock commitments	28,509		17,910
	Commitments to sell residential real estate mortgage loans	50,272		29,364
	Customer related derivative contracts:
	Interest rate swaps with customers	110,821		105,582
	Mirror swaps with counterparties	110,821		105,582
	Interest rate risk management contracts:
	Interest rate swaps	22,681		22,681
	Commitments to Extend Credit
	Commitments to extend credit are agreements to lend to a customer as long as there are no violations 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 some of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements.  Each borrower’s creditworthiness is evaluated on a case-by-case basis.  The amount of collateral obtained is based on management’s credit evaluation of the borrower.
	Standby Letters of Credit
	Standby letters of credit are conditional commitments issued to guarantee the performance of a customer to a third party.  These standby letters of credit are primarily issued to support the financing needs of the Bank’s commercial customers. The credit risk involved in issuing standby letters of credit is essentially the same as that involved in extending loan facilities to customers.  The collateral supporting those commitments is essentially the same as for other commitments. Most standby letters of credit extend for one year.  As of June 30, 2014 and December 31, 2013, the maximum potential amount of undiscounted future payments, not reduced by amounts that may be recovered, totaled $3.1 million and $1.4 million, respectively. At June 30, 2014 and December 31, 2013, there were no liabilities to beneficiaries resulting from standby letters of credit.  Fee income on standby letters of credit for the three and six months ended June 30, 2014 and 2013 was immaterial.
	Forward Loan Commitments
	Interest rate lock commitments are extended to borrowers that relate to the origination of residential real estate mortgage loans held for sale.  To mitigate the interest rate risk inherent in these rate locks, as well as closed residential real estate mortgage loans held for sale, best efforts forward commitments are established to sell individual residential real estate mortgage loans.  Both interest rate lock commitments and commitments to sell residential real estate mortgage loans are derivative financial instruments.
	Leases
	As of June 30, 2014 and December 31, 2013, the Corporation was obligated under various non-cancellable operating leases for properties used as banking offices and other office facilities.  Rental expense under the operating leases amounted to $744 thousand and $1.5 million, respectively, for the three and six months ended June 30, 2014, compared to $672 thousand and $1.3 million, respectively, for the same periods in 2013. Rental expense is recorded as a component of net occupancy expense in the accompanying Consolidated Statements of Income.
	As of June 30, 2014, the minimum annual lease payments under the terms of these leases, exclusive of renewal provisions, are as follows:
	(Dollars in thousands)
	July 1, 2014 to December 31, 2014		$1,253
	2015	2,418
	2016	2,153
	2017	2,017
	2018	1,751
	Thereafter	17,543
	Total minimum lease payments		$27,135
	Lease expiration dates range from one month to 25 years, with renewal options on certain leases of nine months to 25 years.
	Other Contingencies
	Litigation
	The Corporation is involved in various claims and legal proceedings arising out of the ordinary course of business.  Management is of the opinion, based on its review with counsel of the development of such matters to date, that the ultimate disposition of such matters will not materially affect the consolidated financial position or results of operations of the Corporation.
	Other
	When selling a residential real estate mortgage loan or acting as originating agent on behalf of a third party, Washington Trust generally makes various representations and warranties. The specific representations and warranties depend on the nature of the transaction and the requirements of the buyer.  Contractual liability may arise when the representations and warranties are breached.  In the event of a breach of these representations and warranties, Washington Trust may be required to either repurchase the residential real estate mortgage loan (generally at unpaid principal balance plus accrued interest) with the identified defects or indemnify (“make-whole”) the investor for its losses.
	In the case of a repurchase, Washington Trust will bear any subsequent credit loss on the residential real estate mortgage loan.  Washington Trust has experienced an insignificant number of repurchase demands over a period of many years.  As of June 30, 2014 and December 31, 2013, the carrying value of loans repurchased due to representation and warranty claims was $303 thousand and $682 thousand, respectively. In the six months ended June 30, 2014 and 2013, rebates for loans sold that were paid off within contractually agreed upon periods of time were insignificant. Washington Trust has recorded a reserve for its exposure to losses for premium recapture and the obligation to repurchase previously sold residential real estate mortgage loans.  The reserve balance amounted to $275 thousand at June 30, 2014 and December 31, 2013 and is included in other liabilities in the Consolidated Balance Sheets. Any change in the estimate is recorded in net gains on loan sales and commissions on loans originated for others in the Consolidated Statements of Income.

Sale_of_Business_Line

Sale of Business Line	6 Months Ended
	Jun. 30, 2014
Sale of Business Line [Abstract]	'
Sale of Business Line	'
	(18) Sale of Business Line
	On March 1, 2014, the Corporation sold its merchant processing service business line to a third party. The sale resulted in a net gain of $6.3 million, after-tax $4.0 million, or 24 cents per diluted share.  In connection with the sale, Washington Trust incurred divestiture related costs of $355 thousand, after-tax $227 thousand, or 1 cent per diluted share, in the first quarter of 2014. The Corporation also has the opportunity to earn additional referral revenues during the ten-year period following the transaction.

General_Information_Policies

General Information (Policies)	6 Months Ended
	Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Consolidation Policy	'
	The consolidated financial statements include the accounts of the Bancorp and its subsidiaries (collectively, the “Corporation” or “Washington Trust”).  All significant intercompany transactions have been eliminated.
Use of Estimates Policy	'
	The accounting and reporting policies of the Corporation conform to accounting principles generally accepted in the United States of America (“GAAP”) and to general practices of the banking industry.  In preparing the financial statements, management is required to make 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 are the determination of the allowance for loan losses, the review of goodwill and other intangible assets for impairment and the assessment of investment securities for impairment.

Loans_Policies

Loans (Policies)	6 Months Ended
	Jun. 30, 2014
Receivables [Abstract]	'
Nonaccrual Loan Status Policy	'
	Loans, with the exception of certain well-secured loans that are in the process of collection, are placed on nonaccrual status and interest recognition is suspended when such loans are 90 days or more overdue with respect to principal and/or interest or sooner if considered appropriate by management. Well-secured loans are permitted to remain on accrual status provided that full collection of principal and interest is assured and the loan is in the process of collection. Loans are also placed on nonaccrual status when, in the opinion of management, full collection of principal and interest is doubtful. Interest previously accrued but not collected on such loans is reversed against current period income. Subsequent interest payments received on nonaccrual loans are applied to the outstanding principal balance of the loan or recognized as interest income depending on management’s assessment of the ultimate collectability of the loan. Loans are removed from nonaccrual status when they have been current as to principal and interest for a period of time, the borrower has demonstrated an ability to comply with repayment terms, and when, in management’s opinion, the loans are considered to be fully collectible.
Troubled Debt Restructuring Policy	'
	Loans are considered restructured in a troubled debt restructuring when the Corporation has granted concessions to a borrower due to the borrower’s financial condition that it otherwise would not have considered. These concessions may include modifications of the terms of the debt such as deferral of payments, extension of maturity, reduction of principal balance, reduction of the stated interest rate other than normal market rate adjustments, or a combination of these concessions. Debt may be bifurcated with separate terms for each tranche of the restructured debt. Restructuring a loan in lieu of aggressively enforcing the collection of the loan may benefit the Corporation by increasing the ultimate probability of collection.
	Restructured loans are classified as accruing or non-accruing based on management’s assessment of the collectibility of the loan. Loans which are already on nonaccrual status at the time of the restructuring generally remain on nonaccrual status for approximately six months before management considers such loans for return to accruing status. Accruing restructured loans are placed into nonaccrual status if and when the borrower fails to comply with the restructured terms and management deems it unlikely that the borrower will return to a status of compliance in the near term.
	Troubled debt restructurings are reported as such for at least one year from the date of the restructuring. In years after the restructuring, troubled debt restructured loans are removed from this classification if the restructuring did not involve a below market rate concession and the loan is not deemed to be impaired based on the terms specified in the restructuring agreement.
	Troubled debt restructurings are classified as impaired loans. The Corporation identifies loss allocations for impaired loans on an individual loan basis.
Commercial Loan Credit Quality Policy	'
	Commercial
	The Corporation utilizes an internal rating system to assign a risk to each of its commercial loans. Loans are rated on a scale of 1 to 10. This scale can be assigned to three broad categories including “pass” for ratings 1 through 6, “special mention” for 7-rated loans, and “classified” for loans rated 8, 9 or 10. The loan rating system takes into consideration parameters including the borrower’s financial condition, the borrower’s performance with respect to loan terms, and the adequacy of collateral. As of June 30, 2014 and December 31, 2013, the weighted average risk rating of the Corporation’s commercial loan portfolio was 4.61 and 4.64, respectively. For non-impaired loans, the Corporation assigns a loss allocation factor to each loan, based on its risk rating for purposes of establishing an appropriate allowance for loan losses. See Note 6 for additional information.
	Descriptions of the commercial loan categories are as follows:
	Pass - Loans with acceptable credit quality, defined as ranging from superior or very strong to a status of lesser stature. Superior or very strong credit quality is characterized by a high degree of cash collateralization or strong balance sheet liquidity. Lesser stature loans have an acceptable level of credit quality but exhibit some weakness in various credit metrics such as collateral adequacy, cash flow, or performance inconsistency or may be in an industry or of a loan type known to have a higher degree of risk.
	Special Mention - Loans with potential weaknesses that deserve management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the asset or in the Bank’s position as creditor at some future date. Special Mention assets are not adversely classified and do not expose the Bank to sufficient risk to warrant adverse classification. Examples of these conditions include but are not limited to outdated or poor quality financial data, strains on liquidity and leverage, losses or negative trends in operating results, marginal cash flow, weaknesses in occupancy rates or trends in the case of commercial real estate and frequent delinquencies.
	Classified - Loans identified as “substandard”, “doubtful” or “loss” based on criteria consistent with guidelines provided by banking regulators. A “substandard” loan has defined weaknesses which make payment default or principal exposure likely, but not yet certain. Such loans are apt to be dependent upon collateral liquidation, a secondary source of repayment or an event outside of the normal course of business. The loans are closely watched and are either already on nonaccrual status or may be placed on nonaccrual status when management determines there is uncertainty of collectibility. A “doubtful” loan is placed on non-accrual status and has a high probability of loss, but the extent of the loss is difficult to quantify due to dependency upon collateral having a value that is difficult to determine or upon some near-term event which lacks certainty. A loan in the “loss” category is considered generally uncollectible or the timing or amount of payments cannot be determined. “Loss” is not intended to imply that the loan has no recovery value but rather it is not practical or desirable to continue to carry the asset.
	The Corporation’s procedures call for loan ratings and classifications to be revised whenever information becomes available that indicates a change is warranted. The criticized loan portfolio, which consists of commercial and commercial real estate loans that are risk rated special mention or worse, are reviewed by management on a quarterly basis, focusing on the current status and strategies to improve the credit. An annual loan review program is conducted by a third party to provide an independent evaluation of the creditworthiness of the commercial loan portfolio, the quality of the underwriting and credit risk management practices and the appropriateness of the risk rating classifications. This review is supplemented with selected targeted internal reviews of the commercial loan portfolio.
Residential/Consumer Credit Quality Policy	'
	The residential and consumer portfolios are monitored on an ongoing basis by the Corporation using delinquency information and loan type as credit quality indicators. These credit quality indicators are assessed on an aggregate basis in these relatively homogeneous portfolios. For non-impaired loans, the Corporation assigns loss allocation factors to each respective loan type and delinquency status. See Note 6 for additional information.
	Various other techniques are utilized to monitor indicators of credit deterioration in the portfolios of residential real estate mortgages and home equity lines and loans. Among these techniques is the periodic tracking of loans with an updated FICO score and an estimated loan to value (“LTV”) ratio. LTV is determined via statistical modeling analyses. The indicated LTV levels are estimated based on such factors as the location, the original LTV, and the date of origination of the loan and do not reflect actual appraisal amounts. The results of these analyses are taken into consideration in the determination of loss allocation factors for residential mortgage and home equity consumer credits. See Note 6 for additional information.

Allowance_for_Loan_Losses_Poli

Allowance for Loan Losses (Policies)	6 Months Ended
	Jun. 30, 2014
Receivables [Abstract]	'
Allowance for Loan Losses Policy	'
	The allowance for loan losses is management’s best estimate of inherent risk of loss in the loan portfolio as of the balance sheet date. The allowance is increased by provisions charged to earnings and by recoveries of amounts previously charged off, and is reduced by charge-offs on loans. The Corporation uses a methodology to systematically measure the amount of estimated loan loss exposure inherent in the loan portfolio for purposes of establishing a sufficient allowance for loan losses. The methodology includes three elements: (1) identification of loss allocations for individual loans deemed to be impaired, (2) loss allocation factors for non-impaired loans based on credit grade, historical loss experience, delinquency factors and other similar credit quality indicators, and (3) an unallocated allowance maintained for measurement imprecision and to reflect management’s consideration of other environmental factors.
	Periodic assessments and revisions to the loss allocation factors used in the assignment of loss exposure are made to appropriately reflect the analysis of migrational loss experience. The Corporation analyzes historical loss experience in the various portfolios over periods deemed to be relevant to the inherent risk of loss in the respective portfolios as of the balance sheet date. The Corporation adjusts the loss allocations for various factors it believes are not adequately presented in historical loss experience, including trends in real estate values, trends in rental rates on commercial real estate, trends in unemployment rates in primary markets, consideration of general economic conditions, and our assessments of credit risk associated with certain industries and an ongoing trend toward larger credit relationships. These factors are also evaluated taking into account the geographic location of the underlying loans. Revisions to loss allocation factors are not retroactively applied.
	Loss allocations for loans deemed to be impaired are measured on a discounted cash flow method based upon the loan’s contractual effective interest rate, or at the loan’s observable market price, or, if the loan is collateral dependent, at the fair value of the collateral. For collateral dependent loans for which repayment is dependent on the sale of the collateral, management adjusts the fair value for estimated costs to sell. For collateral dependent loans for which repayment is dependent on the operation of the collateral, such as accruing troubled debt restructured loans, estimated costs to sell are not incorporated into the measurement. Management may also adjust appraised values to reflect estimated market value declines or apply other discounts to appraised values for unobservable factors resulting from its knowledge of circumstances associated with the property.
	Loss allocation factors are used for non-impaired loans based on credit grade, historical loss experience, delinquency factors and other similar credit quality indicators. Individual commercial loans and commercial mortgage loans not deemed to be impaired are evaluated using the internal rating system described in Note 5 under the caption “Credit Quality Indicators” and the application of loss allocation factors. The loan rating system and the related loss allocation factors take into consideration parameters including the borrower’s financial condition, the borrower’s performance with respect to loan terms, and the adequacy of collateral. Portfolios of more homogeneous populations of loans, including the various categories of residential mortgages and consumer loans, are analyzed as groups, taking into account delinquency status and historical loss experience and other qualitative environmental factors for each type of credit product.
	An unallocated allowance is maintained to allow for measurement imprecision attributable to uncertainty in the economic environment and ever changing conditions and to reflect management’s consideration of qualitative and quantitative assessments of other environmental factors, including, but not limited to, conditions that may affect the collateral position such as environmental matters, regulatory changes affecting the foreclosure process, as well as conditions that may affect the ability of borrowers to meet debt service requirements.
	Because the methodology is based upon historical experience and trends, current economic data as well as management’s judgment, factors may arise that result in different estimations. Significant factors that could give rise to changes in these estimates may include, but are not limited to, changes in economic conditions in our market area, concentration of risk and declines in local property values. Adversely different conditions or assumptions could lead to increases in the allowance. In addition, various regulatory agencies periodically review the allowance for loan losses. Such agencies may require additions to the allowance based on their judgments about information available to them at the time of their examination.

Derivative_Financial_Instrumen1

Derivative Financial Instruments (Policies)	6 Months Ended
	Jun. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivatives Policy	'
	Derivative Financial Instruments
	The Corporation’s derivative financial instruments are used to manage differences in the amount, timing, and duration of the Corporation’s known or expected cash receipts and its known or expected cash payments principally to manage the Corporation’s interest rate risk. Additionally, the Corporation enters into interest rate derivatives to accommodate the business requirements of its customers. All derivatives are recognized as either assets or liabilities on the balance sheet and are measured at fair value.  The accounting for changes in the fair value of derivatives depends on the intended use of the derivative and resulting designation.
	Interest Rate Risk Management Agreements
	Interest rate swaps are used from time to time as part of the Corporation’s interest rate risk management strategy.  Swaps are agreements in which the Corporation and another party agree to exchange interest payments (e.g., fixed-rate for variable-rate payments) computed on a notional principal amount.  The credit risk associated with swap transactions is the risk of default by the counterparty.  To minimize this risk, the Corporation enters into interest rate agreements only with highly rated counterparties that management believes to be creditworthy.  The notional amounts of these agreements do not represent amounts exchanged by the parties and, thus, are not a measure of the potential loss exposure.
	Cash Flow Hedging Instruments
	As of June 30, 2014 and December 31, 2013, the Bancorp had two interest rate swap contracts designated as cash flow hedges to hedge the interest rate associated with $22.7 million of variable rate junior subordinated debentures. The effective portion of the changes in fair value of derivatives designated as cash flow hedges is recorded in other comprehensive income and subsequently reclassified to earnings when gains or losses are realized.  The ineffective portion of changes in fair value of the derivatives is recognized directly in earnings as interest expense.  The Bancorp has pledged collateral to derivative counterparties in the form of cash totaling $939 thousand at June 30, 2014 and $1.6 million at December 31, 2013.  The Bancorp may need to post additional collateral in the future in proportion to potential increases in unrealized loss positions.
	Customer Related Derivative Contracts
	The Corporation has entered into interest rate swap contracts to help commercial loan borrowers manage their interest rate risk.  The interest rate swap contracts with commercial loan borrowers allow them to convert floating-rate loan payments to fixed-rate loan payments.  When we enter into an interest rate swap contract with a commercial loan borrower, we simultaneously enter into a “mirror” swap contract with a third party.  The third party exchanges the client’s fixed-rate loan payments for floating-rate loan payments.  We retain the risk that is associated with the potential failure of counterparties and the risk inherent in originating loans.  As of June 30, 2014 and December 31, 2013, Washington Trust had interest rate swap contracts with commercial loan borrowers with notional amounts of $110.8 million and $105.6 million, respectively, and equal amounts of “mirror” swap contracts with third-party financial institutions.  These derivatives are not designated as hedges and therefore, changes in fair value are recognized in earnings.
	Loan Commitments
	Interest rate lock commitments are extended to borrowers that relate to the origination of residential real estate mortgage loans held for sale.  To mitigate the interest rate risk inherent in these rate locks, as well as closed residential real estate mortgage loans held for sale, best efforts forward commitments are established to sell individual residential real estate mortgage loans.  Both interest rate lock commitments and commitments to sell residential real estate mortgage loans are derivative financial instruments, but do not meet criteria for hedge accounting and as such are treated as derivatives not designated as hedging instruments. These derivative financial instruments are recorded at fair value and changes in fair value of these commitments are reflected in earnings in the period of change. The Corporation has elected to carry newly originated closed residential real estate mortgage loans held for sale at fair value, as changes in fair value in these loans held for sale generally offset changes in interest rate lock and forward sale commitments.

Fair_Value_Measurements_Polici

Fair Value Measurements (Policies)	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Measurement Policy	'
	Items Measured at Fair Value on a Recurring Basis
	Securities available for sale are recorded at fair value on a recurring basis.  When available, the Corporation uses quoted market prices to determine the fair value of securities; such items are classified as Level 1. There were no Level 1 securities held at June 30, 2014 and December 31, 2013.
	Level 2 securities include debt securities with quoted prices, which are traded less frequently than exchange-traded instruments, whose value is determined using matrix pricing with inputs that are observable in the market or can be derived principally from or corroborated by observable market data.  This category generally includes obligations of U.S. government-sponsored enterprises, mortgage-backed securities issued by U.S. government agencies and U.S government-sponsored enterprises, obligations of state and political subdivisions, trust preferred debt securities and corporate bonds.
	Securities not actively traded whose fair value is determined through the use of cash flows utilizing inputs that are unobservable are classified as Level 3. There were no such securities held at June 30, 2014 and December 31, 2013.
	Mortgage Loans Held for Sale
	The fair values of mortgage loans held for sale are generally estimated based on secondary market rates offered for loans with similar characteristics. When secondary market information exists, these loans are classified as Level 2. In certain cases when quoted market prices are not available, fair value is determined by utilizing a discounted cash flow analysis and these assets are classified as Level 3. Any changes in the valuation of mortgage loans held for sale is based upon the change in market interest rates between closing the loan and the measurement date and an immaterial portion attributable to changes in instrument-specific credit risk. There were no level 3 mortgage loans held for sale held at June 30, 2014 and December 31, 2013.
	Derivatives
	Interest rate swap contracts are traded in over-the-counter markets where quoted market prices are not readily available.  Fair value measurements are determined using independent pricing models that utilize primarily market observable inputs, such as swap rates of different maturities and LIBOR rates and, accordingly, are classified as Level 2. Our internal review procedures have confirmed that the fair values determined with independent pricing models and utilized by the Corporation are consistent with GAAP. For purposes of potential valuation adjustments to its interest rate swap contracts, the Corporation evaluates the credit risk of its counterparties as well as that of the Corporation.  Accordingly, Washington Trust considers factors such as the likelihood of default by the Corporation and its counterparties, its net exposures and remaining contractual life, among other factors, in determining if any fair value adjustments related to credit risk are required.  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. Additionally, in accordance with fair value measurement guidance in ASU 2011-04, Washington Trust has made an accounting policy election to measure the credit risk of its derivative financial instruments that are subject to master netting agreements on a net basis by counterparty portfolio.
	Level 2 fair value measurements of forward loan commitments (interest rate lock commitments and commitments to sell residential real estate mortgages) are estimated using the anticipated market price based on pricing indications provided from syndicate banks. In certain cases when quoted market prices are not available, fair value is determined by utilizing a discounted cash flow analysis and these assets are classified as Level 3. There were no level 3 forward loan commitments held at June 30, 2014 and December 31, 2013.
	Items Measured at Fair Value on a Nonrecurring Basis
	Collateral Dependent Impaired Loans
	Collateral dependent loans that are deemed to be impaired are valued based upon the fair value of the underlying collateral.  Such collateral primarily consists of real estate and, to a lesser extent, other business assets.  For collateral dependent loans for which repayment is dependent on the sale of the collateral, management adjusts the fair value for estimated costs to sell. For collateral dependent loans for which repayment is dependent on the operation of the collateral, such as accruing troubled debt restructured loans, estimated costs to sell are not incorporated into the measurement. Management may also adjust appraised values to reflect estimated market value declines or apply other discounts to appraised values resulting from its knowledge of the property.  Internal valuations are utilized to determine the fair value of other business assets.  Collateral dependent impaired loans are categorized as Level 3.
	Property Acquired Through Foreclosure or Repossession
	Property acquired through foreclosure or repossession included in other assets in the Consolidated Balance Sheets is adjusted to fair value less costs to sell upon transfer out of loans through a charge to the allowance for loan losses.  Subsequently, it is carried at the lower of carrying value or fair value less costs to sell. Such subsequent valuation charges are charged through earnings.  Fair value is generally based upon appraised values of the collateral.  Management may adjust appraised values to reflect estimated market value declines or apply other discounts to appraised values for unobservable factors resulting from its knowledge of the property, and such property is categorized as Level 3.
Fair Value Transfer Policy	'
	It is the Corporation’s policy to review and reflect transfers between Levels as of the financial statement reporting date.  During the six months ended June 30, 2014 and 2013, there were no transfers in and/or out of Level 1, 2 or 3.
Fair Value of Financial Instruments Policy	'
	Valuation of Other Financial Instruments
	The methodologies for estimating the fair value of financial instruments that are measured at fair value on a recurring or nonrecurring basis are discussed above. The methodologies for other financial instruments are discussed below.
	Loans
	Fair values are estimated for categories of loans with similar financial characteristics. Loans are segregated by type and are then further segmented into fixed-rate and adjustable-rate interest terms to determine their fair value. The fair value of fixed-rate commercial and consumer loans is calculated by discounting scheduled cash flows through the estimated maturity of the loan using interest rates offered at June 30, 2014 and December 31, 2013 that reflect the credit and interest rate risk inherent in the loan. The estimate of maturity is based on the Corporation’s historical repayment experience. For residential mortgages, fair value is estimated by using market prices for sales of similar loans on the secondary market. The fair value of floating rate commercial and consumer loans approximates carrying value. Fair value for impaired loans is estimated using a discounted cash flow method based upon the loan’s contractual effective interest rate, or at the loan’s observable market price, or if the loan is collateral dependent, at the fair value of the collateral. Loans are classified within Level 3 of the fair value hierarchy.
	Time Deposits
	The discounted values of cash flows using the rates currently offered for deposits of similar remaining maturities were used to estimate the fair value of time deposits. Time deposits are classified within Level 2 of the fair value hierarchy.
	Federal Home Loan Bank Advances
	Rates currently available to the Corporation for advances with similar terms and remaining maturities are used to estimate fair value of existing advances. FHLBB advances are categorized as Level 2.
	Junior Subordinated Debentures
	The fair value of the junior subordinated debentures is estimated using rates currently available to the Corporation for debentures with similar terms and maturities. Junior subordinated debentures are categorized as Level 2.

Defined_Benefit_Pension_Plans_

Defined Benefit Pension Plans (Policies)	6 Months Ended
	Jun. 30, 2014
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]	'
Pension and Other Postretirement Plans Policy	'
	The Corporation maintains a tax-qualified defined benefit pension plan for the benefit of certain eligible employees who were hired prior to October 1, 2007. The Corporation also has non-qualified retirement plans to provide supplemental retirement benefits to certain employees, as defined in the plans.  The supplemental retirement plans provide eligible participants with an additional retirement benefit. In September 2013, the Corporation amended its defined benefit pension plans primarily to freeze benefit accruals after a ten-year transition period ending in December 2023.

Business_Segments_Policies

Business Segments (Policies)	6 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
Segment Reporting Policy	'
	Washington Trust segregates financial information in assessing its results among its Commercial Banking and Wealth Management Services operating segments.  The amounts in the Corporate column include activity not related to the segments, such as the investment securities portfolio, wholesale funding activities and administrative units.  The Corporate column is not considered to be an operating segment.  The methodologies and organizational hierarchies that define the business segments are periodically reviewed and revised.  Results may be restated, when necessary, to reflect changes in organizational structure or allocation methodology. Any changes in estimates and allocations that may affect the reported results of any business segment will not affect the consolidated financial position or results of operations of Washington Trust as a whole.
	Management uses certain methodologies to allocate income and expenses to the business lines.  A funds transfer pricing methodology is used to assign interest income and interest expense to each interest-earning asset and interest-bearing liability on a matched maturity funding basis.  Certain indirect expenses are allocated to segments.  These include support unit expenses such as technology and processing operations and other support functions.
	Commercial Banking
	The Commercial Banking segment includes commercial, commercial real estate, residential and consumer lending activities; equity in losses of unconsolidated investments in real estate limited partnerships; mortgage banking, secondary market and loan servicing activities; deposit generation; merchant credit card services; cash management activities; and direct banking activities, which include the operation of ATMs, telephone and Internet banking services and customer support and sales.
	Wealth Management Services
	Wealth Management Services includes asset management services provided for individuals, institutions and mutual funds; personal trust services, including services as executor, trustee, administrator, custodian and guardian; institutional trust services, including services as trustee for pension and profit sharing plans; and other financial planning and advisory services.
	Corporate
	Corporate includes the Treasury Unit, which is responsible for managing the wholesale investment portfolio and wholesale funding needs.  It also includes income from bank-owned life insurance, net gain on sale of business line as well as administrative and executive expenses not allocated to the operating segments and the residual impact of methodology allocations such as funds transfer pricing offsets.

Earnings_Per_Common_Share_Poli

Earnings Per Common Share (Policies)	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Earnings Per Share Policy	'
	Washington Trust utilizes the two-class method earnings allocation formula to determine earnings per share of each class of stock according to dividends and participation rights in undistributed earnings.  Share-based payments that entitle holders to receive non-forfeitable dividends before vesting are considered participating securities and included in earnings allocation for computing basic earnings per share under this method.  Undistributed income is allocated to common shareholders and participating securities under the two-class method based upon the proportion of each to the total weighted average shares available.

Commitments_and_Contingencies_

Commitments and Contingencies (Policies)	6 Months Ended
	Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Off-Balance-Sheet Credit Exposure Policy	'
	The Corporation is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers and to manage the Corporation’s exposure to fluctuations in interest rates.  These financial instruments include commitments to extend credit, standby letters of credit, interest rate swap agreements and interest rate lock commitments and commitments to sell residential real estate mortgage loans.  These instruments involve, to varying degrees, elements of credit risk in excess of the amount recognized in the Corporation’s Consolidated Balance Sheets.  The contract or notional amounts of these instruments reflect the extent of involvement the Corporation has in particular classes of financial instruments.  The Corporation’s credit policies with respect to interest rate swap agreements with commercial borrowers, commitments to extend credit, and financial guarantees are similar to those used for loans.  The interest rate swaps with other counterparties are generally subject to bilateral collateralization terms.

Securities_Tables

Securities (Tables)	6 Months Ended
	Jun. 30, 2014
Investments, Debt and Equity Securities [Abstract]	'
Summary of Investments	'
	The following tables present the amortized cost, gross unrealized holding gains, gross unrealized holding losses and fair value of securities by major security type and class of security:
	(Dollars in thousands)
	June 30, 2014	Amortized Cost				Unrealized Gains				Unrealized Losses				Fair Value
	Securities Available for Sale:
	Obligations of U.S. government-sponsored enterprises		$9,999				$13				$—				$10,012
	Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises	217,767				10,531				(13		)		228,285
	Obligations of states and political subdivisions	54,161				2,230				—				56,391
	Individual name issuer trust preferred debt securities	30,734				—				(4,099		)		26,635
	Corporate bonds	6,123				133				(1		)		6,255
	Total securities available for sale		$318,784				$12,907				($4,113	)			$327,578
	Held to Maturity:
	Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises		$27,814				$804				$—				$28,618
	Total securities held to maturity		$27,814				$804				$—				$28,618
	Total securities		$346,598				$13,711				($4,113	)			$356,196
	(Dollars in thousands)
	December 31, 2013	Amortized Cost				Unrealized Gains				Unrealized Losses				Fair Value
	Securities Available for Sale:
	Obligations of U.S. government-sponsored enterprises		$54,474				$720				($79	)			$55,115
	Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises	230,387				8,369				(401		)		238,355
	Obligations of states and political subdivisions	60,659				2,200				—				62,859
	Trust preferred securities:
	Individual name issuers	30,715				—				(6,031		)		24,684
	Collateralized debt obligations	547				—				—				547
	Corporate bonds	11,128				231				(16		)		11,343
	Total securities available for sale		$387,910				$11,520				($6,527	)			$392,903
	Held to Maturity:
	Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises		$29,905				$14				($54	)			$29,865
	Total securities held to maturity		$29,905				$14				($54	)			$29,865
	Total securities		$417,815				$11,534				($6,581	)			$422,768
Securities by Contractual Maturity	'
	The schedule of maturities of debt securities available for sale and held to maturity is presented below. Mortgage-backed securities are included based on weighted average maturities, adjusted for anticipated prepayments.  All other debt securities are included based on contractual maturities.  Actual maturities may differ from amounts presented because certain issuers have the right to call or prepay obligations with or without call or prepayment penalties.  Yields on tax exempt obligations are not computed on a tax equivalent basis.
		June 30, 2014
	(Dollars in thousands)	Within 1 Year				1-5 Years				5-10 Years				After 10 Years				Totals
	Securities Available for Sale:
	Obligations of U.S. government-sponsored enterprises:
	Amortized cost		$9,999				$—				$—				$—				$9,999
	Weighted average yield	2.87		%		—		%		—		%		—		%		2.87		%
	Mortgage-backed securities issued by U.S. government-sponsored enterprises:
	Amortized cost	38,199				100,451				53,538				25,579				217,767
	Weighted average yield	3.98		%		3.61		%		2.85		%		2.12		%		3.31		%
	Obligations of state and political subdivisions:
	Amortized cost	18,072				36,089				—				—				54,161
	Weighted average yield	3.85		%		3.93		%		—		%		—		%		3.9		%
	Individual name issuer trust preferred debt securities:
	Amortized cost	—				—				—				30,734				30,734
	Weighted average yield	—		%		—		%		—		%		1.07		%		1.07		%
	Corporate bonds:
	Amortized cost	—				5,919				204				—				6,123
	Weighted average yield	—		%		2.76		%		3.2		%		—		%		2.78		%
	Total debt securities available for sale:
	Amortized cost		$66,270				$142,459				$53,742				$56,313				$318,784
	Weighted average yield	3.77		%		3.66		%		2.85		%		1.55		%		3.17		%
	Fair value		$68,872				$144,962				$56,196				$57,548				$327,578
	Securities Held to Maturity:
	Mortgage-backed securities issued by U.S. government-sponsored enterprises:
	Amortized cost		$3,400				$10,557				$8,373				$5,484				$27,814
	Weighted average yield	3.1		%		3.03		%		2.83		%		1.08		%		2.59		%
	Fair value		$3,498				$10,862				$8,615				$5,643				$28,618
Securities in a Continuous Unrealized Loss Position	'
	Other-Than-Temporary Impairment Assessment
	The Corporation assesses whether the decline in fair value of investment securities is other-than-temporary on a regular basis. Unrealized losses on debt securities may occur from current market conditions, increases in interest rates since the time of purchase, a structural change in an investment, volatility of earnings of a specific issuer, or deterioration in credit quality of the issuer.  Management evaluates impairments in value both qualitatively and quantitatively to assess whether they are other-than-temporary.
	The following tables summarize temporarily impaired securities, segregated by length of time the securities have been in a continuous unrealized loss position:
	(Dollars in thousands)	Less than 12 Months											12 Months or Longer										Total
	June 30, 2014	#			Fair				Unrealized				#			Fair				Unrealized			#	Fair		Unrealized
					Value				Losses							Value				Losses				Value		Losses
	Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises	—				$—				$—			1				$935				($13	)	1		$935		($13	)
	Individual name issuer trust preferred debt securities	—			—				—				11			26,635				(4,099		)	11	26,635		(4,099		)
	Corporate bonds	—			—				—				1			201				(1		)	1	201		(1		)
	Total temporarily impaired securities	—			—					$—			13				$27,771				($4,113	)	13		$27,771		($4,113	)
	(Dollars in thousands)	Less than 12 Months											12 Months or Longer										Total
	December 31, 2013	#			Fair				Unrealized				#			Fair				Unrealized			#	Fair		Unrealized
					Value				Losses							Value				Losses				Value		Losses
	Obligations of U.S. government-sponsored enterprises	1				$9,909				($79	)		—				$—				$—		1		$9,909		($79	)
	Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises	7			76,748				(455		)		—			—				—			7	76,748		(455		)
	Individual name issuer trust preferred debt securities	—			—				—				11			24,684				(6,031		)	11	24,684		(6,031		)
	Corporate bonds	2			407				(16		)		—			—				—			2	407		(16		)
	Total temporarily impaired securities	10				$87,064				($550	)		11				$24,684				($6,031	)	21		$111,748		($6,581	)
Rollforward of OTTI Recognized in Earnings	'
	Credit-Related Impairment Losses Recognized on Debt Securities
	The following table presents a rollforward of the cumulative credit-related impairment losses on debt securities held by the Corporation:
	(Dollars in thousands)	Three months								Six months
	Periods ended June 30,	2014				2013				2014				2013
	Balance at beginning of period		$—				$1,229				$—				$3,325
	Credit-related impairment loss on debt securities for which an other-than-temporary impairment was not previously recognized	—				—				—				—
	Additional increases to the amount of credit-related impairment loss on debt securities for which an other-than-temporary impairment was previously recognized	—				—				—				2,772
	Reductions for securities for which a liquidation notice was received during the period	—				—				—				(4,868		)
	Balance at end of period		$—				$1,229				$—				$1,229
	The January 1, 2014 beginning balance of the cumulative credit-related impairment losses was corrected from the $6.8 million reported in our Form 10-K for the fiscal year ended December 31, 2013 to reflect the impact of the notice of liquidation of a pooled trust preferred security that occurred during the first quarter of 2013 and management’s change in intent to no longer hold its other pooled trust preferred security, which was made in December 2013.

Loans_Tables

Loans (Tables)	6 Months Ended
	Jun. 30, 2014
Receivables [Abstract]	'
Summary of Loans	'
	The following is a summary of loans:
	(Dollars in thousands)	June 30, 2014						December 31, 2013
		Amount			%			Amount				%
	Commercial:
	Mortgages (1)		$772,772		30	%			$796,249			32	%
	Construction and development (2)	38,574			1			36,289				1
	Other (3)	554,824			22			530,797				22
	Total commercial	1,366,170			53			1,363,335				55
	Residential real estate:
	Mortgages	846,187			33			749,163				30
	Homeowner construction	30,452			1			23,511				1
	Total residential real estate	876,639			34			772,674				31
	Consumer:
	Home equity lines	237,390			9			231,362				9
	Home equity loans	45,632			2			40,212				2
	Other (4)	55,293			2			55,301				3
	Total consumer	338,315			13			326,875				14
	Total loans (5)		$2,581,124		100	%			$2,462,884			100	%
	-1	Amortizing mortgages and lines of credit, primarily secured by income producing property.
	-2	Loans for construction commercial properties, loans to developers for construction of residential properties and loans for land development.
	-3	Loans to businesses and individuals, a substantial portion of which are fully or partially collateralized by real estate.
	-4	Fixed-rate consumer installment loans.
	-5	Includes net unamortized loan origination costs of $1.5 million and $879 thousand, respectively, and net unamortized premiums on purchased loans of $100 thousand and $99 thousand, respectively, at June 30, 2014 and December 31, 2013.
Nonaccrual Loans	'
	The following is a summary of nonaccrual loans, segregated by class of loans:
	(Dollars in thousands)	Jun 30,			Dec 31,
		2014			2013
	Commercial:
	Mortgages		$2,290			$7,492
	Construction and development	—			—
	Other	1,615			1,291
	Residential real estate:
	Mortgages	7,417			8,315
	Homeowner construction	—			—
	Consumer:
	Home equity lines	724			469
	Home equity loans	321			687
	Other	168			48
	Total nonaccrual loans		$12,535			$18,302
	Accruing loans 90 days or more past due		$—			$—
	As of June 30, 2014 and December 31, 2013, nonaccrual loans of $2.1 million and $2.7 million, respectively, were current as to the payment of principal and interest.
Past Due Loans	'
	Past due status is based on the contractual payment terms of the loan. The following tables present an age analysis of past due loans, segregated by class of loans:
	(Dollars in thousands)	Days Past Due
	June 30, 2014	30-59			60-89				Over 90				Total Past Due				Current				Total Loans
	Commercial:
	Mortgages		$311			$1,583				$2,250				$4,144				$768,628				$772,772
	Construction and development	—			—				—				—				38,574				38,574
	Other	1,785			773				417				2,975				551,849				554,824
	Residential real estate:
	Mortgages	5,249			855				4,335				10,439				835,748				846,187
	Homeowner construction	—			—				—				—				30,452				30,452
	Consumer:
	Home equity lines	1,227			554				280				2,061				235,329				237,390
	Home equity loans	309			18				106				433				45,199				45,632
	Other	353			530				126				1,009				54,284				55,293
	Total loans		$9,234			$4,313				$7,514				$21,061				$2,560,063				$2,581,124
	(Dollars in thousands)	Days Past Due
	December 31, 2013	30-59			60-89				Over 90				Total Past Due				Current				Total Loans
	Commercial:
	Mortgages		$—			$—				$7,492				$7,492				$788,757				$796,249
	Construction and development	—			—				—				—				36,289				36,289
	Other	276			302				731				1,309				529,488				530,797
	Residential real estate:
	Mortgages	4,040			1,285				5,633				10,958				738,205				749,163
	Homeowner construction	—			—				—				—				23,511				23,511
	Consumer:
	Home equity lines	831			100				269				1,200				230,162				231,362
	Home equity loans	448			66				349				863				39,349				40,212
	Other	43			—				38				81				55,220				55,301
	Total loans		$5,638			$1,753				$14,512				$21,903				$2,440,981				$2,462,884
	Included in past due loans as of June 30, 2014 and December 31, 2013, were nonaccrual loans of $10.4 million and $15.6 million, respectively. All loans 90 days or more past due at June 30, 2014 and December 31, 2013 were classified as nonaccrual.
Impaired Loans	'
	The following is a summary of impaired loans:
	(Dollars in thousands)	Recorded							Unpaid								Related
		Investment (1)							Principal								Allowance
		Jun 30,			Dec 31,				Jun 30,				Dec 31,				Jun 30,				Dec 31,
		2014			2013				2014				2013				2014				2013
	No Related Allowance Recorded:
	Commercial:
	Mortgages		$9,160			$998				$9,135				$998				$—				$—
	Construction and development	—			—				—				—				—				—
	Other	1,032			1,055				1,032				1,050				—				—
	Residential real estate:
	Mortgages	2,226			1,167				2,354				1,259				—				—
	Homeowner construction	—			—				—				—				—				—
	Consumer:
	Home equity lines	—			—				—				—				—				—
	Home equity loans	—			—				—				—				—				—
	Other	—			—				—				—				—				—
	Subtotal		$12,418			$3,220				$12,521				$3,307				$—				$—
	With Related Allowance Recorded:
	Commercial:
	Mortgages		$15,788			$29,335				$16,275				$31,731				$747				$552
	Construction and development	—			—				—				—				—				—
	Other	1,556			1,506				1,843				1,945				324				463
	Residential real estate:
	Mortgages	2,253			3,122				2,538				3,507				390				463
	Homeowner construction	—			—				—				—				—				—
	Consumer:
	Home equity lines	82			173				82				174				41				1
	Home equity loans	94			55				91				54				21				—
	Other	119			127				117				130				2				2
	Subtotal		$19,892			$34,318				$20,946				$37,541				$1,525				$1,481
	Total impaired loans		$32,310			$37,538				$33,467				$40,848				$1,525				$1,481
	Total:
	Commercial		$27,536			$32,894				$28,285				$35,724				$1,071				$1,015
	Residential real estate	4,479			4,289				4,892				4,766				390				463
	Consumer	295			355				290				358				64				3
	Total impaired loans		$32,310			$37,538				$33,467				$40,848				$1,525				$1,481
	-1	The recorded investment in impaired loans consists of unpaid principal balance, net of charge-offs, interest payments received applied to principal and unamortized deferred loan origination fees and costs. For impaired accruing loans (troubled debt restructurings for which management has concluded that the collectibility of the loan is not in doubt), the recorded investment also includes accrued interest.
	The following table presents the average recorded investment balance of impaired loans and interest income recognized on impaired loans segregated by loan class, for the periods indicated:
	(Dollars in thousands)	Average Recorded Investment							Interest Income Recognized
	Three months ended June 30,	2014			2013				2014				2013
	Commercial:
	Mortgages		$25,093			$27,904				$240				$152
	Construction and development	—			—				—				—
	Other	2,492			7,385				15				50
	Residential real estate:
	Mortgages	4,452			4,496				36				27
	Homeowner construction	—			—				—				—
	Consumer:
	Home equity lines	60			191				—				1
	Home equity loans	157			69				2				1
	Other	118			144				2				2
	Totals		$32,372			$40,189				$295				$233
	(Dollars in thousands)	Average Recorded Investment							Interest Income Recognized
	Six months ended June 30,	2014			2013				2014				2013
	Commercial:
	Mortgages		$26,707			$24,423				$405				$252
	Construction and development	—			—				—				—
	Other	2,429			9,001				38				114
	Residential real estate:
	Mortgages	4,100			4,250				50				49
	Homeowner construction	—			—				—				—
	Consumer:
Home equity lines	97			227				2				4
Home equity loans	126			87				3				4
Other	122			153				4				4
Totals		$33,581			$38,141				$502				$427
Troubled Debt Restructurings	'
	The following table presents loans modified as a troubled debt restructuring during the periods indicated:
	(Dollars in thousands)						Outstanding Recorded Investment (1)
		# of Loans					Pre-Modifications								Post-Modifications
	Three months ended June 30,	2014		2013			2014				2013				2014				2013
	Commercial:
	Mortgages	—		3				$—				$9,504				$—				$9,504
	Construction and development	—		—			—				—				—				—
	Other	9		5			763				1,168				763				1,168
	Residential real estate:
	Mortgages	—		—			—				—				—				—
	Homeowner construction	—		—			—				—				—				—
	Consumer:
	Home equity lines	—		—			—				—				—				—
	Home equity loans	—		—			—				—				—				—
	Other	—		—			—				—				—				—
	Totals	9		8				$763				$10,672				$763				$10,672
	(Dollars in thousands)						Outstanding Recorded Investment (1)
		# of Loans					Pre-Modifications								Post-Modifications
	Six months ended June 30,	2014		2013			2014				2013				2014				2013
	Commercial:
	Mortgages	—		5				$—				$9,956				$—				$9,876
	Construction and development	—		—			—				—				—				—
	Other	9		5			763				1,168				763				1,168
	Residential real estate:
	Mortgages	2		—			479				—				479				—
	Homeowner construction	—		—			—				—				—				—
	Consumer:
	Home equity lines	—		1			—				92				—				92
	Home equity loans	—		—			—				—				—				—
	Other	—		—			—				—				—				—
	Totals	11		11				$1,242				$11,216				$1,242				$11,136
	-1	The recorded investment in troubled debt restructurings consists of unpaid principal balance, net of charge-offs and unamortized deferred loan origination fees and costs, at the time of the restructuring. For accruing troubled debt restructured loans, the recorded investment also includes accrued interest.
Troubled Debt Restructurings Type of Modification	'
	The following table provides information on how loans were modified as a troubled debt restructuring during the periods indicated.
	(Dollars in thousands)
		Three months							Six months
	Periods ended June 30,	2014			2013				2014				2013
	Below market interest rate concession		$77			$9,504				$77				$9,818
	Payment deferral	—			—				479				—
	Maturity / amortization concession	599			—				599				—
	Interest only payments	—			323				—				415
	Combination (1)	87			845				87				983
	Total		$763			$10,672				$1,242				$11,216
	-1	Loans included in this classification were modified with a combination of any two of the concessions listed in this table.
Troubled Debt Restructurings Subsequent Default	'
	The following table presents loans modified in a troubled debt restructuring within the previous twelve months for which there was a payment default during the periods indicated:
	(Dollars in thousands)	# of Loans					Recorded
							Investment (1)
	Three months ended June 30,	2014		2013			2014				2013
	Commercial:
	Mortgages	—		1				$—				$482
	Construction and development	—		—			—				—
	Other	3		—			254				—
	Residential real estate:
	Mortgages	—		—			—				—
	Homeowner construction	—		—			—				—
	Consumer:
	Home equity lines	—		—			—				—
	Home equity loans	—		—			—				—
	Other	—		—			—				—
	Totals	3		1				$254				$482
	(Dollars in thousands)	# of Loans					Recorded
							Investment (1)
	Six months ended June 30,	2014		2013			2014				2013
	Commercial:
	Mortgages	—		2				$—				$717
	Construction and development	—		—			—				—
	Other	3		—			254				—
	Residential real estate:
	Mortgages	—		—			—				—
	Homeowner construction	—		—			—				—
	Consumer:
	Home equity lines	—		—			—				—
	Home equity loans	—		1			—				32
	Other	—		—			—				—
	Totals	3		3				$254				$749
	-1	The recorded investment in troubled debt restructurings consists of unpaid principal balance, net of charge-offs and unamortized deferred loan origination fees and costs. For accruing troubled debt restructured loans, the recorded investment also includes accrued interest.
Credit Quality Indicators - Commercial	'
	The following table presents the commercial loan portfolio, segregated by category of credit quality indicator:
	(Dollars in thousands)	Pass							Special Mention								Classified
		Jun 30,			Dec 31,				Jun 30,				Dec 31,				Jun 30,				Dec 31,
		2014			2013				2014				2013				2014				2013
	Mortgages		$742,025			$756,838				$22,819				$23,185				$7,928				$16,226
	Construction and development	38,574			36,289				—				—				—				—
	Other	535,811			507,962				15,900				19,887				3,113				2,948
	Total commercial loans		$1,316,410			$1,301,089				$38,719				$43,072				$11,041				$19,174
Credit Quality Indicators Residential & Consumer	'
	The following table presents the residential and consumer loan portfolios, segregated by category of credit quality indicator:
	(Dollars in thousands)	Under 90 Days Past Due							Over 90 Days Past Due
		Jun 30,			Dec 31,				Jun 30,				Dec 31,
		2014			2013				2014				2013
	Residential real estate:
	Accruing mortgages		$838,770			$740,848				$—				$—
	Nonaccrual mortgages	3,082			2,682				4,335				5,633
	Homeowner construction	30,452			23,511				—				—
	Total residential real estate loans		$872,304			$767,041				$4,335				$5,633
	Consumer:
	Home equity lines		$237,110			$231,093				$280				$269
	Home equity loans	45,526			39,864				106				348
	Other	55,167			55,262				126				39
	Total consumer loans		$337,803			$326,219				$512				$656

Allowance_for_Loan_Losses_Tabl

Allowance for Loan Losses (Tables)	6 Months Ended
	Jun. 30, 2014
Receivables [Abstract]	'
Allowance for Loan Losses Rollforward Analysis	'
	The following tables present the activity in the allowance for loan losses for the three months ended June 30, 2014 and 2013, respectively:
		Commercial
	(Dollars in thousands)	Mortgages			Construction		Other			Total Commercial			Residential			Consumer			Un-allocated			Total
	Beginning Balance		$6,547			$269		$5,201			$12,017			$5,087			$2,565			$7,374			$27,043
	Charge-offs	(32		)	—		(115		)	(147		)	(30		)	(90		)				(267		)
	Recoveries	6			—		20			26			—			17						43
	Provision	452			225		348			1,025			(217		)	77			(435		)	450
	Ending Balance		$6,973			$494		$5,454			$12,921			$4,840			$2,569			$6,939			$27,269
		Commercial
	(Dollars in thousands)	Mortgages			Construction		Other			Total Commercial			Residential			Consumer			Un-allocated			Total
	Beginning Balance		$9,607			$246		$5,966			$15,819			$4,533			$2,489			$8,298			$31,139
	Charge-offs	(4,000		)	—		(85		)	(4,085		)	(39		)	(51		)				(4,175		)
	Recoveries	186			—		22			208			3			9						220
	Provision	955			31		(461		)	525			194			8			(27		)	700
	Ending Balance		$6,748			$277		$5,442			$12,467			$4,691			$2,455			$8,271			$27,884
	The following tables present the activity in the allowance for loan losses for six months ended June 30, 2014 and 2013, respectively:
	(Dollars in thousands)	Commercial
		Mortgages			Construction		Other			Total Commercial			Residential			Consumer			Un-allocated			Total
	Beginning Balance		$6,969			$362		$5,433			$12,764			$4,700			$2,511			$7,911			$27,886
	Charge-offs	(977		)	—		(311		)	(1,288		)	(72		)	(130		)				(1,490		)
	Recoveries	12			—		46			58			35			30						123
	Provision	969			132		286			1,387			177			158			(972		)	750
	Ending Balance		$6,973			$494		$5,454			$12,921			$4,840			$2,569			$6,939			$27,269
	(Dollars in thousands)	Commercial
		Mortgages			Construction		Other			Total Commercial			Residential			Consumer			Un-allocated			Total
	Beginning Balance		$9,407			$224		$5,996			$15,627			$4,269			$2,684			$8,293			$30,873
	Charge-offs	(4,114		)	—		(178		)	(4,292		)	(48		)	(209		)				(4,549		)
	Recoveries	192			—		44			236			3			21						260
	Provision	1,263			53		(420		)	896			467			(41		)	(22		)	1,300
	Ending Balance		$6,748			$277		$5,442			$12,467			$4,691			$2,455			$8,271			$27,884
Schedule of Allowance for Loan Loss by Segment & Impairment Methodology	'
	The following table presents the Corporation’s loan portfolio and associated allowance for loan loss by portfolio segment and by impairment methodology:
	(Dollars in thousands)	June 30, 2014					December 31, 2013
		Loans			Related Allowance		Loans			Related Allowance
	Loans Individually Evaluated for Impairment:
	Commercial:
	Mortgages		$24,893			$747		$30,292			$552
	Construction & development	—			—		—			—
	Other	2,585			324		2,556			463
	Residential real estate	4,456			390		4,290			463
	Consumer	291			64		355			3
	Subtotal		$32,225			$1,525		$37,493			$1,481
	Loans Collectively Evaluated for Impairment:
	Commercial:
	Mortgages		$747,879			$6,226		$765,957			$6,417
	Construction & development	38,574			494		36,289			362
	Other	552,239			5,130		528,241			4,970
	Residential real estate	872,183			4,450		768,384			4,237
	Consumer	338,024			2,505		326,520			2,508
	Subtotal		$2,548,899			$18,805		$2,425,391			$18,494
	Unallocated	—			6,939		—			7,911
	Total		$2,581,124			$27,269		$2,462,884			$27,886

Time_Certificates_of_Deposit_T

Time Certificates of Deposit (Tables)	6 Months Ended
	Jun. 30, 2014
Deposits [Abstract]	'
Schedule of Time Certificates of Deposit Maturities	'
	The following table presents scheduled maturities of time certificates of deposit outstanding at June 30, 2014:
	(Dollars in thousands)	Scheduled Maturity		Weighted Average Rate
	July 1, 2014 through December 31, 2014		$286,272	1.25	%
	2015	209,147		0.95	%
	2016	127,897		1.2	%
	2017	83,968		0.86	%
	2018	50,820		2.01	%
	Thereafter	38,151		0.49	%
	Balance at June 30, 2014		$796,255	1.13	%
Schedule of Time Certificates of Deposit $100 Thousand or More Maturities	'
	The following table presents the amount of time certificates of deposit in denominations of $100 thousand or more at June 30, 2014, maturing during the periods indicated:
	(Dollars in thousands)	Scheduled Maturity
	July 1, 2014 to September 30, 2014		$122,022
	October 1, 2014 to December 31, 2014	43,522
	January 1, 2015 to June 30, 2015	54,999
	July 1, 2015 and beyond	91,951
	Balance at June 30, 2014		$312,494

Borrowings_Tables

Borrowings (Tables)	6 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Federal Home Loan Bank Advances Maturities	'
	The following table presents maturities of FHLBB advances outstanding as of June 30, 2014:
	(Dollars in thousands)	Scheduled		Redeemed at		Weighted
		Maturity		Call Date (1)		Average Rate (2)
	July 1, 2014 to December 31, 2014		$135,759		$135,759	0.36	%
	2015	1,569		1,569		4.89	%
	2016	43,130		43,130		3.1	%
	2017	41,045		41,045		3.16	%
	2018	64,803		64,803		3.85	%
	2019 and after	35,750		35,750		4.5	%
	Balance at June 30, 2014		$322,056		$322,056	2.27	%
	-1	Callable FHLBB advances are shown in the respective periods assuming that the callable debt is redeemed at the call date while all other advances are shown in the periods corresponding to their scheduled maturity date.
	-2	Weighted average rate based on scheduled maturity dates.

Shareholders_Equity_Tables

Shareholders' Equity (Tables)	6 Months Ended
	Jun. 30, 2014
Regulatory Capital Requirements [Abstract]	'
Regulatory Capital Requirements	'
	The following table presents the Corporation’s and the Bank’s actual capital amounts and ratios as well as the corresponding minimum and well capitalized regulatory amounts and ratios:
	(Dollars in thousands)	Actual				For Capital Adequacy Purposes				To Be “Well Capitalized” Under Prompt Corrective Action Provisions
		Amount		Ratio		Amount		Ratio		Amount		Ratio
	June 30, 2014
	Total Capital (to Risk-Weighted Assets):
	Corporation	$330,146		13.24	%	$199,489		8	%	$249,361		10	%
	Bank	$325,097		13.05	%	$199,343		8	%	$249,179		10	%
	Tier 1 Capital (to Risk-Weighted Assets):
	Corporation	$302,541		12.13	%	$99,744		4	%	$149,616		6	%
	Bank	$297,492		11.94	%	$99,671		4	%	$149,507		6	%
	Tier 1 Capital (to Average Assets): (1)
	Corporation	$302,541		9.62	%	$125,796		4	%	$157,245		5	%
	Bank	$297,492		9.47	%	$125,633		4	%	$157,041		5	%
	December 31, 2013
	Total Capital (to Risk-Weighted Assets):
	Corporation		$319,486	13.29	%		$192,306	8	%		$240,382	10	%
	Bank		$314,458	13.09	%		$192,147	8	%		$240,184	10	%
	Tier 1 Capital (to Risk-Weighted Assets):
	Corporation		$291,292	12.12	%		$96,153	4	%		$144,229	6	%
	Bank		$286,264	11.92	%		$96,074	4	%		$144,111	6	%
	Tier 1 Capital (to Average Assets): (1)
	Corporation		$291,292	9.41	%		$123,785	4	%		$154,732	5	%
	Bank		$286,264	9.26	%		$123,633	4	%		$154,541	5	%
	(1)    Leverage ratio

Derivative_Financial_Instrumen2

Derivative Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Fair Value of Derivatives by Balance Sheet Location	'
	The following table presents the fair values of derivative instruments in the Corporation’s Consolidated Balance Sheets as of the dates indicated:
	(Dollars in thousands)	Asset Derivatives										Liability Derivatives
				Fair Value										Fair Value
		Balance Sheet Location		Jun 30, 2014				Dec 31, 2013				Balance Sheet Location		Jun 30, 2014				Dec 31, 2013
	Derivatives Designated as Cash Flow Hedging Instruments:
	Interest rate risk management contracts:
	Interest rate swap contracts	Other assets			$—				$—			Other liabilities			$773				$1,012
	Derivatives not Designated as Hedging Instruments:
	Forward loan commitments:
	Interest rate lock commitments	Other assets		998				392				Other liabilities		3				—
	Commitments to sell mortgage loans	Other assets		16				10				Other liabilities		1,655				583
	Customer related derivative contracts:
	Interest rate swaps with customers	Other assets		3,046				2,403				Other liabilities		101				297
	Mirror swaps with counterparties	Other assets		113				330				Other liabilities		3,125				2,406
	Total				$4,173				$3,135						$5,657				$4,298
Derivative Instruments Effect in Statements of Income and Changes in Shareholders' Equity	'
	The following tables present the effect of derivative instruments in the Corporation’s Consolidated Statements of Income and Changes in Shareholders’ Equity for the periods indicated:
	(Dollars in thousands)	Gain (Loss) Recognized in Other Comprehensive Income (Effective Portion)																Location of Gain (Loss) Recognized in Income (Ineffective Portion and Amount Excluded from Effectiveness Testing)		Gain (Loss) Recognized in Income (Ineffective Portion)
		Three months								Six months										Three months				Six months
	Periods ended June 30,	2014				2013				2014				2013						2014		2013		2014		2013
	Derivatives Designated as Cash Flow Hedging Instruments:
	Interest rate risk management contracts:
	Interest rate swap contracts		$79				$152				$155				$272			Interest Expense			$—		$—		$—		$—
	Total		$79				$152				$155				$272						$—		$—		$—		$—
	(Dollars in thousands)		Amount of Gain (Loss) Recognized in Income
		Statement of Income Location	Three months								Six months
	Periods ended June 30,		2014				2013				2014				2013
	Derivatives not Designated as Hedging Instruments:
	Forward loan commitments:
	Interest rate lock commitments	Net gains on loan sales & commissions on loans originated for others		$326				($855	)			$603				($1,773	)
	Commitments to sell mortgage loans	Net gains on loan sales & commissions on loans originated for others	(753		)		1,753				(1,066		)		3,724
	Customer related derivative contracts:
	Interest rate swaps with customers	Net gains (losses) on interest rate swaps	1,120				(407		)		2,150				(411		)
	Mirror swaps with counterparties	Net gains (losses) on interest rate swaps	(1,157		)		559				(1,927		)		582
	Total			($464	)			$1,050				($240	)			$2,122

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Change in Fair Value Mortgage Loans Held For Sale, Interest Rate Lock Commitments and Commitments to Sell Disclosures	'
	The following table presents the changes in fair value related to mortgage loans held for sale, interest rate lock commitments and commitments to sell residential real estate mortgage loans for the periods indicated. Changes in fair values are reported as a component of net gains on loan sales and commissions on loans originated for others in the Consolidated Statements of Income.
	(Dollars in thousands)
		Three Months							Six months
	Periods ended June 30,	2014			2013				2014				2013
	Mortgage loans held for sale		$387			($898	)			$463				($1,959	)
	Interest rate lock commitments	326			(855		)		603				(1,773		)
	Commitments to sell	(753		)	1,753				(1,066		)		3,724
	Total changes in fair value		($40	)		$—				$—				($8	)
Assets and Liabilities Measured at Fair Value on a Recurring Basis	'
	Items Recorded at Fair Value on a Recurring Basis
	The tables below present the balances of assets and liabilities reported at fair value on a recurring basis:
	(Dollars in thousands)												Assets/Liabilities at Fair Value
		Fair Value Measurements Using
	June 30, 2014	Level 1			Level 2				Level 3
	Assets:
	Securities available for sale:
	Obligations of U.S. government-sponsored enterprises		$—			$10,012				$—				$10,012
	Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises	—			228,285				—				228,285
	Obligations of states and political subdivisions	—			56,391				—				56,391
	Individual name issuer trust preferred debt securities	—			26,635				—				26,635
	Corporate bonds	—			6,255				—				6,255
	Mortgage loans held for sale	—			22,407				—				22,407
	Derivative assets (1):
	Interest rate swap contracts with customers	—			3,159				—				3,159
	Forward loan commitments	—			1,014				—				1,014
	Total assets at fair value on a recurring basis		$—			$354,158				$—				$354,158
	Liabilities:
	Derivative liabilities (1):
	Mirror swap contracts with counterparties		$—			$3,226				$—				$3,226
	Interest rate risk management swap contracts	—			773				—				773
	Forward loan commitments	—			1,658				—				1,658
	Total liabilities at fair value on a recurring basis		$—			$5,657				$—				$5,657
	-1	Derivative assets are included in other assets and derivative liabilities are reported in other liabilities in the Consolidated Balance Sheets.
	(Dollars in thousands)												Assets/Liabilities at Fair Value
		Fair Value Measurements Using
	December 31, 2013	Level 1			Level 2				Level 3
	Assets:
	Securities available for sale:
	Obligations of U.S. government-sponsored enterprises		$—			$55,115				$—				$55,115
	Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises	—			238,355				—				238,355
	Obligations of states and political subdivisions	—			62,859				—				62,859
	Individual name issuer trust preferred debt securities	—			24,684				—				24,684
	Pooled trust preferred debt securities	—			547				—				547
	Corporate bonds	—			11,343				—				11,343
	Mortgage loans held for sale	—			11,636				—				11,636
	Derivative assets (1):
	Interest rate swap contracts with customers	—			2,733				—				2,733
	Forward loan commitments	—			402				—				402
	Total assets at fair value on a recurring basis		$—			$407,674				$—				$407,674
	Liabilities:
	Derivative liabilities (1):
	Mirror swap contracts with counterparties		$—			$2,703				$—				$2,703
	Interest rate risk management swap contracts	—			1,012				—				1,012
	Forward loan commitments	—			583				—				583
	Total liabilities at fair value on a recurring basis		$—			$4,298				$—				$4,298
	-1	Derivative assets are included in other assets and derivative liabilities are reported in other liabilities in the Consolidated Balance Sheets.
Schedule of Changes in Level Three Assets and Liabilities Measured at Fair Value on a Recurring Basis	'
	There were no Level 3 assets and liabilities measured at fair value on a recurring basis during the three and six months ended June 30, 2014.
	The following tables present the changes in Level 3 assets and liabilities measured at fair value on a recurring basis during the periods indicated.
	Three months ended June 30,	2013
	(Dollars in thousands)	Securities Available for Sale (1)			Mortgage Loans Held for Sale (2)				Derivative Assets / (Liabilities) (3)				Total
	Balance at beginning of period		$404		7,955					$48				$8,407
	Gains and losses (realized and unrealized):
	Included in earnings (4)	—			48				(48		)		—
	Included in other comprehensive income	(7		)	—				—				(7		)
	Purchases	—			—				—				—
	Issuances	—			(5,176		)		—				(5,176		)
	Sales	—			(2,827		)		—				(2,827		)
	Settlements	—			—				—				—
	Transfers into Level 3	—			—				—				—
	Transfers out of Level 3	—			—				—				—
	Balance at end of period		$397			$—				$—				$397
	Six months ended June 30,	2013
	(Dollars in thousands)	Securities Available for Sale (1)			Mortgage Loans Held for Sale (2)			Derivative Assets / (Liabilities) (3)				Total
	Balance at beginning of period		$843		9,813				($142	)			$10,514
	Gains and losses (realized and unrealized):
	Included in earnings (4)	(2,772		)	(150	)		142				(2,780		)
	Included in other comprehensive income	2,459			—			—				2,459
	Purchases	—			—			—				—
	Issuances	—			12,692			—				12,692
	Sales	—			(22,355	)		—				(22,355		)
	Settlements	(133		)	—			—				(133		)
	Transfers into Level 3	—			—			—				—
	Transfers out of Level 3	—			—			—				—
	Balance at end of period		$397		—				$—				$397
	-1	Level 3 securities available for sale were comprised of pooled trust preferred debt securities in the form of collateralized debt obligations.
	-2	Level 3 mortgage loans held for sale consisted of certain mortgage loans whose fair value was determined utilizing a discounted cash flow analysis.
	-3	Level 3 derivative assets / liabilities consisted of forward loan commitments (interest rate lock commitments and commitments to sell residential real estate mortgages) whose fair value was determined utilizing a discounted cash flow analysis.
	-4	Losses included in earnings for Level 3 securities available for sale were included in net impairment losses recognized in earnings in the Consolidated Income Statement. Losses included in earnings for Level 3 mortgage loans held for sale and derivative assets and liabilities were included in net gains on loan sales and commissions on loans originated for others in the Consolidated Statements of Income.
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis	'
	Items Recorded at Fair Value on a Nonrecurring Basis
	Certain assets are measured at fair value on a nonrecurring basis in accordance with GAAP.  These adjustments to fair value usually result from the application of lower of cost or market accounting or write-downs of individual assets.  The valuation methodologies used to measure these fair value adjustments are described above.
	The following table summarizes such assets, which were written down to fair value during the six months ended June 30, 2014:
	(Dollars in thousands)	June 30, 2014
		Level 1			Level 2				Level 3				Total
	Collateral dependent impaired loans		$—			$—				$6,643				$6,643
	Property acquired through foreclosure or repossession	—			—				492				492
	Total assets at fair value on a nonrecurring basis		$—			$—				$7,135				$7,135
	The allowance for loan losses on collateral dependent impaired loans amounted to $912 thousand at June 30, 2014.
	The following table summarizes such assets, which were written down to fair value during the year ended December 31, 2013:
	(Dollars in thousands)	December 31, 2013
		Level 1			Level 2				Level 3				Total
	Collateral dependent impaired loans		$—			$—				$11,177				$11,177
	Property acquired through foreclosure or repossession	—			—				435				435
	Total assets at fair value on a nonrecurring basis		$—			$—				$11,612				$11,612
	The allowance for loan losses allocation on collateral dependent impaired loans amounted to $453 thousand at December 31, 2013.
Quantitative Information About Level 3 Assets Measured at Fair Value on a Nonrecurring Basis	'
	The following tables present additional quantitative information about assets measured at fair value on a nonrecurring basis for which the Corporation has utilized Level 3 inputs to determine fair value for the dates indicated.
	(Dollars in thousands)	June 30, 2014
		Fair Value			Valuation Technique		Unobservable Input	Range of Inputs Utilized (Weighted Average)
	Collateral dependent impaired loans		$6,643		Appraisals of collateral		Discount for costs to sell	10% - 25% (11%)
							Appraisal adjustments (1)	0% - 40% (5%)
	Property acquired through foreclosure or repossession		$492		Appraisals of collateral		Discount for costs to sell	0% - 10% (7%)
							Appraisal adjustments (1)	9% - 22% (15%)
	(Dollars in thousands)	December 31, 2013
		Fair Value			Valuation Technique		Unobservable Input	Range of Inputs Utilized (Weighted Average)
	Collateral dependent impaired loans		$11,177		Appraisals of collateral		Discount for costs to sell	1% - 45% (11%)
							Appraisal adjustments (1)	0% - 50% (2%)
	Property acquired through foreclosure or repossession		$435		Appraisals of collateral		Discount for costs to sell	2% - 10% (9%)
							Appraisal adjustments (1)	0% - 22% (13%)
	-1	Management may adjust appraisal values to reflect market value declines or other discounts resulting from its knowledge of the property.
Carrying Amounts and Estimated Fair Values of Financial Instruments	'
	The following tables present the carrying amount, estimated fair value and placement in the fair value hierarchy of the Corporation’s financial instruments. The tables exclude financial instruments for which the carrying value approximates fair value. Financial assets for which the fair value approximates carrying value include cash and cash equivalents, FHLBB stock, accrued interest receivable and bank-owned life insurance. Financial liabilities for which the fair value approximates carrying value include non-maturity deposits and accrued interest payable.
	(Dollars in thousands)								Fair Value Measurements
	June 30, 2014	Carrying Amount			Estimated Fair Value				Level 1				Level 2			Level 3
	Financial Assets:
	Securities held to maturity		$27,814			$28,618				$—				$28,618			$—
	Loans, net of allowance for loan losses	2,553,855			2,604,038				—				—			2,604,038
	Loan servicing rights	2,868			3,188				—				—			3,188
	Financial Liabilities:
	Time deposits		$796,255			$798,437				$—				$798,437			$—
	FHLBB advances	322,056			337,519				—				337,519			—
	Junior subordinated debentures	22,681			17,704				—				17,704			—
	(Dollars in thousands)								Fair Value Measurements
	December 31, 2013	Carrying Amount			Estimated Fair Value				Level 1				Level 2			Level 3
	Financial Assets:
	Securities held to maturity		$29,905			$29,865				$—				$29,865			$—
	Loans, net of allowance for loan losses	2,434,998			2,479,527				—				—			2,479,527
	Loan servicing rights	2,698			2,767				—				—			2,767
	Financial Liabilities:
	Time deposits		$790,762			$797,748				$—				$797,748			$—
	FHLBB advances	288,082			308,317				—				308,317			—
	Junior subordinated debentures	22,681			16,282				—				16,282			—

Defined_Benefit_Pension_Plans_1

Defined Benefit Pension Plans (Tables)	6 Months Ended
	Jun. 30, 2014
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]	'
Components of Net Periodic Benefit Cost	'
	The composition of net periodic benefit cost was as follows for the periods indicated:
	(Dollars in thousands)	Qualified Pension Plan												Non-Qualified Retirement Plans
		Three months						Six months						Three months				Six months
	Periods ended June 30,	2014			2013			2014			2013			2014		2013		2014		2013
	Service cost		$538			$731			$1,076			$1,461			$11		$49		$23		$99
	Interest cost	722			719			1,445			1,438			119		115		239		230
	Expected return on plan assets	(1,015		)	(924		)	(2,031		)	(1,849		)	—		—		—		—
	Amortization of prior service cost	(5		)	(9		)	(11		)	(17		)	—		—		—		—
	Recognized net actuarial loss	115			414			230			828			19		49		35		98
	Net periodic benefit cost		$355			$931			$709			$1,861			$149		$213		$297		$427

Business_Segments_Tables

Business Segments (Tables)	6 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
Statement of Operations and Total Assets by Reportable Segment	'
	The following table presents the statement of operations and total assets for Washington Trust’s reportable segments:
	(Dollars in thousands)	Commercial Banking				Wealth Management Services					Corporate					Consolidated Total
	Three months ended June 30,	2014		2013		2014			2013		2014		2013			2014		2013
	Net interest income (expense)		$19,799		$19,731		($7	)		$2		$4,676		$2,676			$24,468		$22,409
	Provision for loan losses	450		700		—			—		—		—			450		700
	Net interest income (expense) after provision for loan losses	19,349		19,031		(7		)	2		4,676		2,676			24,018		21,709
	Noninterest income	3,860		7,991		8,530			7,912		424		491			12,814		16,394
	Noninterest expenses:
	Depreciation and amortization expense	621		624		272			325		52		54			945		1,003
	Other noninterest expenses	13,219		16,268		5,482			5,022		2,802		2,712			21,503		24,002
	Total noninterest expenses	13,840		16,892		5,754			5,347		2,854		2,766			22,448		25,005
	Income before income taxes	9,369		10,130		2,769			2,567		2,246		401			14,384		13,098
	Income tax expense (benefit)	3,102		3,402		1,018			949		467		(236		)	4,587		4,115
	Net income		$6,267		$6,728		$1,751			$1,618		$1,779		$637			$9,797		$8,983
	Total assets at period end		$2,704,109		$2,509,407		$53,303			$52,129		$559,610		$499,771			$3,317,022		$3,061,307
	Expenditures for long-lived assets		$1,308		$367		$65			$28		$17		$15			$1,390		$410
	(Dollars in thousands)	Commercial Banking				Wealth Management Services					Corporate					Consolidated Total
	Six months ended June 30,	2014		2013		2014			2013		2014		2013			2014		2013
	Net interest income (expense)		$39,538		$39,242		($11	)		$9		$8,777		$5,625			$48,304		$44,876
	Provision for loan losses	750		1,300		—			—		—		—			750		1,300
	Net interest income (expense) after provision for loan losses	38,788		37,942		(11		)	9		8,777		5,625			47,554		43,576
	Noninterest income (expense)	8,401		15,937		16,595			15,386		7,188		(1,763		)	32,184		29,560
	Noninterest expenses:
	Depreciation and amortization expense	1,206		1,262		583			652		103		109			1,892		2,023
	Other noninterest expenses	26,772		31,404		10,869			10,134		12,207		5,628			49,848		47,166
	Total noninterest expenses	27,978		32,666		11,452			10,786		12,310		5,737			51,740		49,189
	Income (loss) before income taxes	19,211		21,213		5,132			4,609		3,655		(1,875		)	27,998		23,947
	Income tax expense (benefit)	6,363		7,898		1,894			1,815		646		(2,170		)	8,903		7,543
	Net income (loss)		$12,848		$13,315		$3,238			$2,794		$3,009		$295			$19,095		$16,404
	Total assets at period end		$2,704,109		$2,509,407		$53,303			$52,129		$559,610		$499,771			$3,317,022		$3,061,307
	Expenditures for long-lived assets		$2,383		$737		$236			$54		$62		$46			$2,681		$837

Other_Comprehensive_Income_Tab

Other Comprehensive Income (Tables)	6 Months Ended
	Jun. 30, 2014
Equity [Abstract]	'
Activity in Other Comprehensive Income	'
	The following tables present the activity in other comprehensive income for the periods indicated:
	Three months ended June 30,	2014										2013
	(Dollars in thousands)	Pre-tax Amounts			Income Taxes			Net of Tax				Pre-tax Amounts			Income Taxes			Net of Tax
	Securities available for sale:
	Changes in fair value of securities available for sale		$2,837			$1,020			$1,817				($5,958	)		($2,137	)		($3,821	)
	Net losses (gains) on securities reclassified into earnings (1)	—			—			—				—			—			—
	Net change in fair value of securities available for sale	2,837			1,020			1,817				(5,958		)	(2,137		)	(3,821		)
	Reclassification adjustment for other-than-temporary impairment losses transferred into earnings (2)	—			—			—				—			—			—
	Cash flow hedges:
	Change in fair value of cash flow hedges	19			33			(14		)		52			18			34
	Net cash flow hedge losses reclassified into earnings (3)	145			52			93				184			66			118
	Net change in fair value of cash flow hedges	164			85			79				236			84			152
	Defined benefit plan obligation adjustment (4)	127			46			81				454			162			292
	Total other comprehensive income (loss)		$3,128			$1,151			$1,977				($5,268	)		($1,891	)		($3,377	)
	Six months ended June 30,	2014										2013
	(Dollars in thousands)	Pre-tax Amounts			Income Taxes			Net of Tax				Pre-tax Amounts			Income Taxes			Net of Tax
	Securities available for sale:
	Changes in fair value of securities available for sale		$3,801			$1,372			$2,429				($7,569	)		($2,695	)		($4,874	)
	Net losses on securities reclassified into earnings (1)	—			—			—				613			220			393
	Net change in fair value of securities available for sale	3,801			1,372			2,429				(6,956		)	(2,475		)	(4,481		)
	Reclassification adjustment for other-than-temporary impairment losses transferred into earnings (2)	—			—			—				2,159			775			1,384
	Cash flow hedges:
	Change in fair value of cash flow hedges	(24		)	6			(30		)		45			13			32
	Net cash flow hedge losses reclassified into earnings (3)	290			105			185				374			134			240
	Net change in fair value of cash flow hedges	266			111			155				419			147			272
	Defined benefit plan obligation adjustment (4)	254			85			169				909			280			629
	Total other comprehensive income (loss)		$4,321			$1,568			$2,753				($3,469	)		($1,273	)		($2,196	)
	-1	Reported as total other-than-temporary impairment losses on securities in the Consolidated Statements of Income.
	-2	Reported as the portion of loss recognized in other comprehensive income in the Consolidated Statements of Income.
	-3	Included in interest expense on junior subordinated debentures in the Consolidated Statements of Income.
	-4	Included in salaries and employee benefits expense in the Consolidated Statements of Income.
Components of Accumulated Other Comprehensive Income	'
	The following table presents the changes in accumulated other comprehensive income (loss) by component, net of tax, for the six months ended June 30, 2014:
	(Dollars in thousands)	Net Unrealized Gains on Available For Sale Securities				Noncredit -related Impairment				Net Unrealized Losses on Cash Flow Hedges				Pension Benefit Adjustment				Total
	Balance at December 31, 2013		$3,089				$112				($618	)			($4,136	)			($1,553	)
	Other comprehensive income (loss) before reclassifications	2,429				—				(30		)		—				2,399
	Amounts reclassified from accumulated other comprehensive income	—				—				185				169				354
	Net other comprehensive income	2,429				—				155				169				2,753
	Balance at June 30, 2014		$5,518				$112				($463	)			($3,967	)			$1,200
	The following table presents the changes in accumulated other comprehensive income (loss) by component, net of tax, for the six months ended June 30, 2013:
	(Dollars in thousands)	Net Unrealized Gains on Available For Sale Securities				Noncredit -related Impairment				Net Unrealized Losses on Cash Flow Hedges				Pension Benefit Adjustment				Total
	Balance at December 31, 2012		$9,711				($1,938	)			($1,006	)			($17,266	)			($10,499	)
	Other comprehensive income (loss) before reclassifications	(4,874		)		—				32				—				(4,842		)
	Amounts reclassified from accumulated other comprehensive income	393				1,384				240				629				2,646
	Net other comprehensive (loss) income	(4,481		)		1,384				272				629				(2,196		)
	Balance at June 30, 2013		$5,230				($554	)			($734	)			($16,637	)			($12,695	)

Earnings_Per_Common_Share_Tabl

Earnings Per Common Share (Tables)	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Calculation of Earnings Per Share	'
	The calculation of earnings per common share is presented below.
	(Dollars and shares in thousands, except per share amounts)
		Three Months						Six months
	Periods ended June 30,	2014			2013			2014			2013
	Net income		$9,797			$8,983			$19,095			$16,404
	Less dividends and undistributed earnings allocated to participating securities	(33		)	(39		)	(74		)	(78		)
	Net income applicable to common shareholders		$9,764			$8,944			$19,021			$16,326
	Weighted average basic common shares	16,678			16,454			16,653			16,428
	Dilutive effect of common stock equivalents	153			127			164			130
	Weighted average diluted common shares	16,831			16,581			16,817			16,558
	Earnings per common share:
	Basic		$0.59			$0.54			$1.14			$0.99
	Diluted		$0.58			$0.54			$1.13			$0.99
	Weighted average common stock equivalents, not included in common stock equivalents above because they were anti-dilutive, were 55 thousand and 241 thousand, respectively, for the three months ended June 30, 2014 and 2013. These amounts were 55 thousand and 394 thousand, respectively, for the six months ended June 30, 2014 and 2013.

Commitments_and_Contingencies_1

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Financial Instruments with Off Balance Sheet Risk	'
	The contractual and notional amounts of financial instruments with off-balance sheet risk are as follows:
	(Dollars in thousands)	Jun 30,		Dec 31,
		2014		2013
	Financial instruments whose contract amounts represent credit risk:
	Commitments to extend credit:
	Commercial loans		$319,422		$259,061
	Home equity lines	198,343		198,432
	Other loans	47,827		35,175
	Standby letters of credit	3,147		1,363
	Financial instruments whose notional amounts exceed the amount of credit risk:
	Forward loan commitments:
	Interest rate lock commitments	28,509		17,910
	Commitments to sell residential real estate mortgage loans	50,272		29,364
	Customer related derivative contracts:
	Interest rate swaps with customers	110,821		105,582
	Mirror swaps with counterparties	110,821		105,582
	Interest rate risk management contracts:
	Interest rate swaps	22,681		22,681
Schedule of Future Minimum Operating Lease Payments	'
	Leases
	As of June 30, 2014 and December 31, 2013, the Corporation was obligated under various non-cancellable operating leases for properties used as banking offices and other office facilities.  Rental expense under the operating leases amounted to $744 thousand and $1.5 million, respectively, for the three and six months ended June 30, 2014, compared to $672 thousand and $1.3 million, respectively, for the same periods in 2013. Rental expense is recorded as a component of net occupancy expense in the accompanying Consolidated Statements of Income.
	As of June 30, 2014, the minimum annual lease payments under the terms of these leases, exclusive of renewal provisions, are as follows:
	(Dollars in thousands)
	July 1, 2014 to December 31, 2014		$1,253
	2015	2,418
	2016	2,153
	2017	2,017
	2018	1,751
	Thereafter	17,543
	Total minimum lease payments		$27,135

Cash_and_Due_from_Banks_Narrat

Cash and Due from Banks (Narrative) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Cash and Cash Equivalents [Abstract]	'	'
Average reserve deposited with the Board of Governors of the Federal Reserve Bank	$5.90	$6.70
Interest-bearing deposits in other banks	$92.90	$51.80

Securities_Narrative_Details

Securities (Narrative) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014	Jun. 30, 2014
In Millions, unless otherwise specified	security	security	Trust preferred securities: Individual name issuers [Member]	Trust preferred securities: Individual name issuers [Member]	Minimum [Member]	Maximum [Member]
			security	security
Schedule of Available for Sale and Held to Maturty Securities [Line Items]	'	'	'	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Total, Number	13	21	11	11	'	'
Fair Value of Available for Sale and Held to Maturity securities pledged as collateral	$339.90	$397.50	'	'	'	'
Amortized cost of callable debt securities	85.1	'	'	'	'	'
Fair value of callable debt securities	82.8	'	'	'	'	'
Callable Debt Securities, Maturity Period	'	'	'	'	'15 months	'23 years
Callable Debt Securities, Call Feature, Period	'	'	'	'	'1 month	'3 years
Securities in unrealized loss position, number of companies issuing securities	7	'	'	'	'	'
Amortized cost of trust preferred securities of individual name issuers that are below investment grade	11.9	'	'	'	'	'
Unrealized losses of trust preferred securities of individual name issuers that are below investment grade	$1.60	'	'	'	'	'

Securities_Narrative_Securitie

Securities (Narrative Securities OTTI) (Details) (USD $)	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Credit related impairment losses on debt securities	$0	$0	$0	$1,229	$1,229	$3,325
Scenario, Previously Reported [Member]	'	'	'	'	'	'
Credit related impairment losses on debt securities	'	'	$6,800	'	'	'

Securities_Summary_of_Investme

Securities (Summary of Investments) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Available for Sale and Held to Maturty Securities [Line Items]	'	'
Available for sale securities amortized cost basis	$318,784	$387,910
Available for sale securities unrealized gains	12,907	11,520
Available for sale securities unrealized losses	-4,113	-6,527
Total securities available for sale fair value	327,578	392,903
Held to maturity securities	27,814	29,905
Held to maturity securities unrealized gains	804	14
Held to maturity securities unrealized losses	0	-54
Held to maturity securities fair value	28,618	29,865
Total available for sale and held to maturity securities amortized cost	346,598	417,815
Total available for sale and held to maturity securities unrealized gains	13,711	11,534
Total available for sale and held to maturity securities unrealized losses	-4,113	-6,581
Total available for sale and held to maturity securities fair value	356,196	422,768
Obligations of U.S. government-sponsored enterprises [Member]	'	'
Schedule of Available for Sale and Held to Maturty Securities [Line Items]	'	'
Available for sale securities amortized cost basis	9,999	54,474
Available for sale securities unrealized gains	13	720
Available for sale securities unrealized losses	0	-79
Total securities available for sale fair value	10,012	55,115
Mortgage-backed securities issued by US Government-sponsored enterprises [Member]	'	'
Schedule of Available for Sale and Held to Maturty Securities [Line Items]	'	'
Available for sale securities amortized cost basis	217,767	230,387
Available for sale securities unrealized gains	10,531	8,369
Available for sale securities unrealized losses	-13	-401
Total securities available for sale fair value	228,285	238,355
Held to maturity securities	27,814	29,905
Held to maturity securities unrealized gains	804	14
Held to maturity securities unrealized losses	0	-54
Held to maturity securities fair value	28,618	29,865
Obligations of states and political subdivisions [Member]	'	'
Schedule of Available for Sale and Held to Maturty Securities [Line Items]	'	'
Available for sale securities amortized cost basis	54,161	60,659
Available for sale securities unrealized gains	2,230	2,200
Available for sale securities unrealized losses	0	0
Total securities available for sale fair value	56,391	62,859
Trust preferred securities: Individual name issuers [Member]	'	'
Schedule of Available for Sale and Held to Maturty Securities [Line Items]	'	'
Available for sale securities amortized cost basis	30,734	30,715
Available for sale securities unrealized gains	0	0
Available for sale securities unrealized losses	-4,099	-6,031
Total securities available for sale fair value	26,635	24,684
Trust preferred securities: Collateralized debt obligations [Member]	'	'
Schedule of Available for Sale and Held to Maturty Securities [Line Items]	'	'
Available for sale securities amortized cost basis	'	547
Available for sale securities unrealized gains	'	0
Available for sale securities unrealized losses	'	0
Total securities available for sale fair value	'	547
Corporate bonds [Member]	'	'
Schedule of Available for Sale and Held to Maturty Securities [Line Items]	'	'
Available for sale securities amortized cost basis	6,123	11,128
Available for sale securities unrealized gains	133	231
Available for sale securities unrealized losses	-1	-16
Total securities available for sale fair value	$6,255	$11,343

Securities_Securities_by_Contr

Securities (Securities by Contractual Maturity) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Available for Sale and Held to Maturty Securities [Line Items]	'	'
Available for sale debt securities maturities within 1 year amortized cost	$66,270	'
Available for sale debt securities maturities 1-5 years amortized cost	142,459	'
Available for sale debt securities maturities 5-10 years amortized cost	53,742	'
Available for sale debt securities maturities after 10 years amortized cost	56,313	'
Available for sale debt securities maturities total amortized cost	318,784	'
Available for sale debt securities maturities within 1 year weighted average yield	3.77%	'
Available for sale debt securities maturities 1-5 years weighted average yield	3.66%	'
Available for sale debt securities maturities 5-10 years weighted average yield	2.85%	'
Available for sale debt securities maturities after 10 years weighted average yield	1.55%	'
Available for sale debt securities maturities total weighted average yield	3.17%	'
Available for sale debt securities maturities within 1 year fair value	68,872	'
Available for sale debt securities maturities 1-5 years fair value	144,962	'
Available for sale debt securities maturities 5-10 years fair value	56,196	'
Available for sale debt securities maturities after 10 years fair value	57,548	'
Available for sale debt securities fair value	327,578	'
Held to maturity debt securities maturities total amortized cost	27,814	29,905
Held to maturity debt securities maturities within 1 year fair value	3,498	'
Held to maturity debt securities maturities 1-5 years fair value	10,862	'
Held to maturity debt securities maturities 5-10 years fair value	8,615	'
Held to maturity debt securities maturities after 10 years fair value	5,643	'
Held to maturity securities fair value	28,618	29,865
Obligations of U.S. government-sponsored enterprises [Member]	'	'
Schedule of Available for Sale and Held to Maturty Securities [Line Items]	'	'
Available for sale debt securities maturities within 1 year amortized cost	9,999	'
Available for sale debt securities maturities 1-5 years amortized cost	0	'
Available for sale debt securities maturities 5-10 years amortized cost	0	'
Available for sale debt securities maturities after 10 years amortized cost	0	'
Available for sale debt securities maturities total amortized cost	9,999	'
Available for sale debt securities maturities within 1 year weighted average yield	2.87%	'
Available for sale debt securities maturities 1-5 years weighted average yield	0.00%	'
Available for sale debt securities maturities 5-10 years weighted average yield	0.00%	'
Available for sale debt securities maturities after 10 years weighted average yield	0.00%	'
Available for sale debt securities maturities total weighted average yield	2.87%	'
Mortgage-backed securities issued by US Government-sponsored enterprises [Member]	'	'
Schedule of Available for Sale and Held to Maturty Securities [Line Items]	'	'
Available for sale debt securities maturities within 1 year amortized cost	38,199	'
Available for sale debt securities maturities 1-5 years amortized cost	100,451	'
Available for sale debt securities maturities 5-10 years amortized cost	53,538	'
Available for sale debt securities maturities after 10 years amortized cost	25,579	'
Available for sale debt securities maturities total amortized cost	217,767	'
Available for sale debt securities maturities within 1 year weighted average yield	3.98%	'
Available for sale debt securities maturities 1-5 years weighted average yield	3.61%	'
Available for sale debt securities maturities 5-10 years weighted average yield	2.85%	'
Available for sale debt securities maturities after 10 years weighted average yield	2.12%	'
Available for sale debt securities maturities total weighted average yield	3.31%	'
Held to maturity debt securities maturities within 1 year amortized cost	3,400	'
Held to maturity debt securities maturities 1-5 years amortized cost	10,557	'
Held to maturity debt securities maturities 5-10 years amortized cost	8,373	'
Held to maturity debt securities maturities after 10 years amortized cost	5,484	'
Held to maturity debt securities maturities total amortized cost	27,814	29,905
Held to maturity debt securities maturities within 1 year weighted average yield	3.10%	'
Held to maturity debt securities maturities 1-5 years weighted average yield	3.03%	'
Held to maturity debt securities maturities 5-10 years weighted average yield	2.83%	'
Held to maturity debt securities maturities after 10 years weighted average yield	1.08%	'
Held to maturity debt securities maturities total weighted average yield	2.59%	'
Held to maturity securities fair value	28,618	29,865
Obligations of states and political subdivisions [Member]	'	'
Schedule of Available for Sale and Held to Maturty Securities [Line Items]	'	'
Available for sale debt securities maturities within 1 year amortized cost	18,072	'
Available for sale debt securities maturities 1-5 years amortized cost	36,089	'
Available for sale debt securities maturities 5-10 years amortized cost	0	'
Available for sale debt securities maturities after 10 years amortized cost	0	'
Available for sale debt securities maturities total amortized cost	54,161	'
Available for sale debt securities maturities within 1 year weighted average yield	3.85%	'
Available for sale debt securities maturities 1-5 years weighted average yield	3.93%	'
Available for sale debt securities maturities 5-10 years weighted average yield	0.00%	'
Available for sale debt securities maturities after 10 years weighted average yield	0.00%	'
Available for sale debt securities maturities total weighted average yield	3.90%	'
Trust Preferred Securities [Member]	'	'
Schedule of Available for Sale and Held to Maturty Securities [Line Items]	'	'
Available for sale debt securities maturities within 1 year amortized cost	0	'
Available for sale debt securities maturities 1-5 years amortized cost	0	'
Available for sale debt securities maturities 5-10 years amortized cost	0	'
Available for sale debt securities maturities after 10 years amortized cost	30,734	'
Available for sale debt securities maturities total amortized cost	30,734	'
Available for sale debt securities maturities within 1 year weighted average yield	0.00%	'
Available for sale debt securities maturities 1-5 years weighted average yield	0.00%	'
Available for sale debt securities maturities 5-10 years weighted average yield	0.00%	'
Available for sale debt securities maturities after 10 years weighted average yield	1.07%	'
Available for sale debt securities maturities total weighted average yield	1.07%	'
Corporate bonds [Member]	'	'
Schedule of Available for Sale and Held to Maturty Securities [Line Items]	'	'
Available for sale debt securities maturities within 1 year amortized cost	0	'
Available for sale debt securities maturities 1-5 years amortized cost	5,919	'
Available for sale debt securities maturities 5-10 years amortized cost	204	'
Available for sale debt securities maturities after 10 years amortized cost	0	'
Available for sale debt securities maturities total amortized cost	$6,123	'
Available for sale debt securities maturities within 1 year weighted average yield	0.00%	'
Available for sale debt securities maturities 1-5 years weighted average yield	2.76%	'
Available for sale debt securities maturities 5-10 years weighted average yield	3.20%	'
Available for sale debt securities maturities after 10 years weighted average yield	0.00%	'
Available for sale debt securities maturities total weighted average yield	2.78%	'

Securities_Securities_in_a_Con

Securities (Securities in a Continuous Unrealized Loss Position) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	security	security
Schedule of Available-for-sale Securities [Line Items]	'	'
Number of securities in a continuous unrealized loss position for less than 12 months	0	10
Fair value of securities in a continuous unrealized loss position for less than 12 months	$0	$87,064
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	0	-550
Number of securities in a continuous unrealized loss position for 12 months or longer	13	11
Fair value of securities in a continuous unrealized loss position for 12 months or longer	27,771	24,684
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	-4,113	-6,031
Number of securities in a continuous unrealized loss position total	13	21
Fair value of securities in a continuous unrealized loss position total	27,771	111,748
Unrealized losses of securities in a continuous unrealized loss position total	-4,113	-6,581
Obligations of U.S. government-sponsored enterprises [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Number of securities in a continuous unrealized loss position for less than 12 months	'	1
Fair value of securities in a continuous unrealized loss position for less than 12 months	'	9,909
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	'	-79
Number of securities in a continuous unrealized loss position for 12 months or longer	'	0
Fair value of securities in a continuous unrealized loss position for 12 months or longer	'	0
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	'	0
Number of securities in a continuous unrealized loss position total	'	1
Fair value of securities in a continuous unrealized loss position total	'	9,909
Unrealized losses of securities in a continuous unrealized loss position total	'	-79
Mortgage-backed securities issued by US Government-sponsored enterprises [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Number of securities in a continuous unrealized loss position for less than 12 months	0	7
Fair value of securities in a continuous unrealized loss position for less than 12 months	0	76,748
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	0	-455
Number of securities in a continuous unrealized loss position for 12 months or longer	1	0
Fair value of securities in a continuous unrealized loss position for 12 months or longer	935	0
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	-13	0
Number of securities in a continuous unrealized loss position total	1	7
Fair value of securities in a continuous unrealized loss position total	935	76,748
Unrealized losses of securities in a continuous unrealized loss position total	-13	-455
Trust preferred securities: Individual name issuers [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Number of securities in a continuous unrealized loss position for less than 12 months	0	0
Fair value of securities in a continuous unrealized loss position for less than 12 months	0	0
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	0	0
Number of securities in a continuous unrealized loss position for 12 months or longer	11	11
Fair value of securities in a continuous unrealized loss position for 12 months or longer	26,635	24,684
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	-4,099	-6,031
Number of securities in a continuous unrealized loss position total	11	11
Fair value of securities in a continuous unrealized loss position total	26,635	24,684
Unrealized losses of securities in a continuous unrealized loss position total	-4,099	-6,031
Corporate bonds [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Number of securities in a continuous unrealized loss position for less than 12 months	0	2
Fair value of securities in a continuous unrealized loss position for less than 12 months	0	407
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	0	-16
Number of securities in a continuous unrealized loss position for 12 months or longer	1	0
Fair value of securities in a continuous unrealized loss position for 12 months or longer	201	0
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	-1	0
Number of securities in a continuous unrealized loss position total	1	2
Fair value of securities in a continuous unrealized loss position total	201	407
Unrealized losses of securities in a continuous unrealized loss position total	($1)	($16)

Securities_Rollfoward_of_OTTI_

Securities (Rollfoward of OTTI Recognized in Earnings) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Investments, Debt and Equity Securities [Abstract]	'	'	'	'
Credit related impairment losses on debt securities, beginning balance	$0	$1,229	$0	$3,325
Credit-related impairment loss on debt securities for which an other-than-temporary impairment was not previously recognized	0	0	0	0
Additional increases to the amount of credit-related impairment loss on debt securities for which an other-than-temporary impairment was previously recognized	0	0	0	2,772
Reductions for securities for which a liquidation notice was received during the period	0	0	0	-4,868
Credit related impairment losses on debt securities, ending balance	$0	$1,229	$0	$1,229

Loans_Narrative_Details

Loans (Narrative) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Receivables [Abstract]	'	'
Loans Receivable Net Deferred Cost Originated	$1,500,000	$879,000
Loans Receivable Net Deferred Premium on Purchased Loans	100,000	99,000
Loans Pledged as Collateral	1,180,000,000	1,140,000,000
Past Due Loans on Nonaccrual	$10,400,000	$15,600,000

Loans_Narrative_Troubled_Debt_

Loans (Narrative - Troubled Debt Restructurings) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Receivables [Abstract]	'	'
Recorded investment in troubled debt restructurings	$26,600,000	$26,400,000
Interest Receivable	63,000	44,000
Specific Reserves on Troubled Debt Restructurings	$795,000	$556,000

Loans_Narrative_Credit_Quality

Loans (Narrative - Credit Quality Indicators) (Details)	Jun. 30, 2014	Dec. 31, 2013
	rating	rating
Receivables [Abstract]	'	'
Weighted Average Risk Rating, Commercial Loans	4.61	4.64

Loans_Summary_of_Loans_Details

Loans (Summary of Loans) (Details) (USD $)	Jun. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Commercial	$1,366,170		$1,363,335
Residential real estate	876,639		772,674
Consumer	338,315		326,875
Total loans	2,581,124	[1]	2,462,884	[1]
Percent of Total Loans	100.00%	[1]	100.00%	[1]
Commercial Mortgages [Member]	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Commercial	772,772	[2]	796,249	[2]
Total loans	772,772		796,249
Percent of Total Loans	30.00%	[2]	32.00%	[2]
Commercial Construction and Development [Member]	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Commercial	38,574	[3]	36,289	[3]
Total loans	38,574		36,289
Percent of Total Loans	1.00%	[3]	1.00%	[3]
Commercial Other [Member]	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Commercial	554,824	[4]	530,797	[4]
Total loans	554,824		530,797
Percent of Total Loans	22.00%	[4]	22.00%	[4]
Commercial Segment [Member]	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Commercial	1,366,170		1,363,335
Percent of Total Loans	53.00%		55.00%
Residential Mortgage [Member]	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Residential real estate	846,187		749,163
Total loans	846,187		749,163
Percent of Total Loans	33.00%		30.00%
Homeowner Construction [Member]	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Residential real estate	30,452		23,511
Total loans	30,452		23,511
Percent of Total Loans	1.00%		1.00%
Residential Segment [Member]	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Residential real estate	876,639		772,674
Percent of Total Loans	34.00%		31.00%
Home Equity Lines [Member]	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Consumer	237,390		231,362
Total loans	237,390		231,362
Percent of Total Loans	9.00%		9.00%
Home Equity Loans [Member]	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Consumer	45,632		40,212
Total loans	45,632		40,212
Percent of Total Loans	2.00%		2.00%
Other Consumer [Member]	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Consumer	55,293	[5]	55,301	[5]
Total loans	55,293		55,301
Percent of Total Loans	2.00%	[5]	3.00%	[5]
Consumer Segment [Member]	'		'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'		'
Consumer	$338,315		$326,875
Percent of Total Loans	13.00%		14.00%
[1]	Includes net unamortized loan origination costs of $1.5 million and $879 thousand, respectively, and net unamortized premiums on purchased loans of $100 thousand and $99 thousand, respectively, at June 30, 2014 and December 31, 2013.
[2]	Amortizing mortgages and lines of credit, primarily secured by income producing property.
[3]	Loans for construction commercial properties, loans to developers for construction of residential properties and loans for land development.
[4]	Loans to businesses and individuals, a substantial portion of which are fully or partially collateralized by real estate.
[5]	Fixed-rate consumer installment loans.

Loans_Nonaccrual_Loans_Details

Loans (Nonaccrual Loans) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Nonaccrual loans	$12,535	$18,302
Accruing loans 90 days or more past due	0	0
Current Payment Status [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Nonaccrual loans	2,100	2,700
Commercial Mortgages [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Nonaccrual loans	2,290	7,492
Commercial Construction and Development [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Nonaccrual loans	0	0
Commercial Other [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Nonaccrual loans	1,615	1,291
Residential Mortgage [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Nonaccrual loans	7,417	8,315
Homeowner Construction [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Nonaccrual loans	0	0
Home Equity Lines [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Nonaccrual loans	724	469
Home Equity Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Nonaccrual loans	321	687
Other Consumer [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Nonaccrual loans	$168	$48

Loans_Past_Due_Loans_Details

Loans (Past Due Loans) (Details) (USD $)	Jun. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
Loans 30 to 59 Days Past Due	$9,234		$5,638
Loans 60 to 89 Days Past Due	4,313		1,753
Loans Over 90 Days Past Due	7,514		14,512
Total Loans Past Due	21,061		21,903
Current Loans	2,560,063		2,440,981
Total loans	2,581,124	[1]	2,462,884	[1]
Commercial Mortgages [Member]	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
Loans 30 to 59 Days Past Due	311		0
Loans 60 to 89 Days Past Due	1,583		0
Loans Over 90 Days Past Due	2,250		7,492
Total Loans Past Due	4,144		7,492
Current Loans	768,628		788,757
Total loans	772,772		796,249
Commercial Construction and Development [Member]	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
Loans 30 to 59 Days Past Due	0		0
Loans 60 to 89 Days Past Due	0		0
Loans Over 90 Days Past Due	0		0
Total Loans Past Due	0		0
Current Loans	38,574		36,289
Total loans	38,574		36,289
Commercial Other [Member]	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
Loans 30 to 59 Days Past Due	1,785		276
Loans 60 to 89 Days Past Due	773		302
Loans Over 90 Days Past Due	417		731
Total Loans Past Due	2,975		1,309
Current Loans	551,849		529,488
Total loans	554,824		530,797
Residential Mortgage [Member]	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
Loans 30 to 59 Days Past Due	5,249		4,040
Loans 60 to 89 Days Past Due	855		1,285
Loans Over 90 Days Past Due	4,335		5,633
Total Loans Past Due	10,439		10,958
Current Loans	835,748		738,205
Total loans	846,187		749,163
Homeowner Construction [Member]	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
Loans 30 to 59 Days Past Due	0		0
Loans 60 to 89 Days Past Due	0		0
Loans Over 90 Days Past Due	0		0
Total Loans Past Due	0		0
Current Loans	30,452		23,511
Total loans	30,452		23,511
Home Equity Lines [Member]	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
Loans 30 to 59 Days Past Due	1,227		831
Loans 60 to 89 Days Past Due	554		100
Loans Over 90 Days Past Due	280		269
Total Loans Past Due	2,061		1,200
Current Loans	235,329		230,162
Total loans	237,390		231,362
Home Equity Loans [Member]	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
Loans 30 to 59 Days Past Due	309		448
Loans 60 to 89 Days Past Due	18		66
Loans Over 90 Days Past Due	106		349
Total Loans Past Due	433		863
Current Loans	45,199		39,349
Total loans	45,632		40,212
Other Consumer [Member]	'		'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'		'
Loans 30 to 59 Days Past Due	353		43
Loans 60 to 89 Days Past Due	530		0
Loans Over 90 Days Past Due	126		38
Total Loans Past Due	1,009		81
Current Loans	54,284		55,220
Total loans	$55,293		$55,301
[1]	Includes net unamortized loan origination costs of $1.5 million and $879 thousand, respectively, and net unamortized premiums on purchased loans of $100 thousand and $99 thousand, respectively, at June 30, 2014 and December 31, 2013.

Loans_Impaired_Loans_Details

Loans (Impaired Loans) (Details) (USD $)	Jun. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment of Impaired Loans with No Related Allowance	$12,418	[1]	$3,220	[1]
Recorded Investment of Impaired Loans with Related Allowance	19,892	[1]	34,318	[1]
Total Recorded Investment of Impaired Loans	32,310	[1]	37,538	[1]
Unpaid Principal of Impaired Loans with No Related Allowance	12,521		3,307
Unpaid Principal of Impaired Loans with Related Allowance	20,946		37,541
Total Unpaid Principal of Impaired Loans	33,467		40,848
No Related Allowance on Impaired Loans	0		0
Related Allowance on Impaired Loans	1,525		1,481
Commercial Mortgages [Member]	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment of Impaired Loans with No Related Allowance	9,160	[1]	998	[1]
Recorded Investment of Impaired Loans with Related Allowance	15,788	[1]	29,335	[1]
Unpaid Principal of Impaired Loans with No Related Allowance	9,135		998
Unpaid Principal of Impaired Loans with Related Allowance	16,275		31,731
No Related Allowance on Impaired Loans	0		0
Related Allowance on Impaired Loans	747		552
Commercial Construction and Development [Member]	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment of Impaired Loans with No Related Allowance	0	[1]	0	[1]
Recorded Investment of Impaired Loans with Related Allowance	0	[1]	0	[1]
Unpaid Principal of Impaired Loans with No Related Allowance	0		0
Unpaid Principal of Impaired Loans with Related Allowance	0		0
No Related Allowance on Impaired Loans	0		0
Related Allowance on Impaired Loans	0		0
Commercial Other [Member]	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment of Impaired Loans with No Related Allowance	1,032	[1]	1,055	[1]
Recorded Investment of Impaired Loans with Related Allowance	1,556	[1]	1,506	[1]
Unpaid Principal of Impaired Loans with No Related Allowance	1,032		1,050
Unpaid Principal of Impaired Loans with Related Allowance	1,843		1,945
No Related Allowance on Impaired Loans	0		0
Related Allowance on Impaired Loans	324		463
Residential Mortgage [Member]	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment of Impaired Loans with No Related Allowance	2,226	[1]	1,167	[1]
Recorded Investment of Impaired Loans with Related Allowance	2,253	[1]	3,122	[1]
Unpaid Principal of Impaired Loans with No Related Allowance	2,354		1,259
Unpaid Principal of Impaired Loans with Related Allowance	2,538		3,507
No Related Allowance on Impaired Loans	0		0
Related Allowance on Impaired Loans	390		463
Homeowner Construction [Member]	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment of Impaired Loans with No Related Allowance	0	[1]	0	[1]
Recorded Investment of Impaired Loans with Related Allowance	0	[1]	0	[1]
Unpaid Principal of Impaired Loans with No Related Allowance	0		0
Unpaid Principal of Impaired Loans with Related Allowance	0		0
No Related Allowance on Impaired Loans	0		0
Related Allowance on Impaired Loans	0		0
Home Equity Lines [Member]	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment of Impaired Loans with No Related Allowance	0	[1]	0	[1]
Recorded Investment of Impaired Loans with Related Allowance	82	[1]	173	[1]
Unpaid Principal of Impaired Loans with No Related Allowance	0		0
Unpaid Principal of Impaired Loans with Related Allowance	82		174
No Related Allowance on Impaired Loans	0		0
Related Allowance on Impaired Loans	41		1
Home Equity Loans [Member]	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment of Impaired Loans with No Related Allowance	0	[1]	0	[1]
Recorded Investment of Impaired Loans with Related Allowance	94	[1]	55	[1]
Unpaid Principal of Impaired Loans with No Related Allowance	0		0
Unpaid Principal of Impaired Loans with Related Allowance	91		54
No Related Allowance on Impaired Loans	0		0
Related Allowance on Impaired Loans	21		0
Other Consumer [Member]	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment of Impaired Loans with No Related Allowance	0	[1]	0	[1]
Recorded Investment of Impaired Loans with Related Allowance	119	[1]	127	[1]
Unpaid Principal of Impaired Loans with No Related Allowance	0		0
Unpaid Principal of Impaired Loans with Related Allowance	117		130
No Related Allowance on Impaired Loans	0		0
Related Allowance on Impaired Loans	2		2
Commercial Segment [Member]	'		'
Financing Receivable, Impaired [Line Items]	'		'
Total Recorded Investment of Impaired Loans	27,536	[1]	32,894	[1]
Total Unpaid Principal of Impaired Loans	28,285		35,724
Related Allowance on Impaired Loans	1,071		1,015
Residential Segment [Member]	'		'
Financing Receivable, Impaired [Line Items]	'		'
Total Recorded Investment of Impaired Loans	4,479	[1]	4,289	[1]
Total Unpaid Principal of Impaired Loans	4,892		4,766
Related Allowance on Impaired Loans	390		463
Consumer Segment [Member]	'		'
Financing Receivable, Impaired [Line Items]	'		'
Total Recorded Investment of Impaired Loans	295	[1]	355	[1]
Total Unpaid Principal of Impaired Loans	290		358
Related Allowance on Impaired Loans	$64		$3
[1]	The recorded investment in impaired loans consists of unpaid principal balance, net of charge-offs, interest payments received applied to principal and unamortized deferred loan origination fees and costs. For impaired accruing loans (troubled debt restructurings for which management has concluded that the collectibility of the loan is not in doubt), the recorded investment also includes accrued interest.

Loans_Impaired_Loans_Interest_

Loans (Impaired Loans Interest Income Recognized) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average Recorded Investment of Impaired Loans	$32,372	$40,189	$33,581	$38,141
Interest Income Recognized on Impaired Loans	295	233	502	427
Commercial Mortgages [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average Recorded Investment of Impaired Loans	25,093	27,904	26,707	24,423
Interest Income Recognized on Impaired Loans	240	152	405	252
Commercial Construction and Development [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average Recorded Investment of Impaired Loans	0	0	0	0
Interest Income Recognized on Impaired Loans	0	0	0	0
Commercial Other [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average Recorded Investment of Impaired Loans	2,492	7,385	2,429	9,001
Interest Income Recognized on Impaired Loans	15	50	38	114
Residential Mortgage [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average Recorded Investment of Impaired Loans	4,452	4,496	4,100	4,250
Interest Income Recognized on Impaired Loans	36	27	50	49
Homeowner Construction [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average Recorded Investment of Impaired Loans	0	0	0	0
Interest Income Recognized on Impaired Loans	0	0	0	0
Home Equity Lines [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average Recorded Investment of Impaired Loans	60	191	97	227
Interest Income Recognized on Impaired Loans	0	1	2	4
Home Equity Loans [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average Recorded Investment of Impaired Loans	157	69	126	87
Interest Income Recognized on Impaired Loans	2	1	3	4
Other Consumer [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average Recorded Investment of Impaired Loans	118	144	122	153
Interest Income Recognized on Impaired Loans	$2	$2	$4	$4

Loans_Troubled_Debt_Restructur

Loans (Troubled Debt Restructurings) (Details) (USD $)	3 Months Ended				6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
	loan		loan		loan		loan
Financing Receivable, Modifications [Line Items]	'		'		'		'
Number of Loans Modified as a Troubled Debt Restructuring	9		8		11		11
Pre-Modification Recorded Investment	$763	[1]	$10,672	[1]	$1,242	[1]	$11,216	[1]
Post-Modification Recorded Investment	763	[1]	10,672	[1]	1,242	[1]	11,136	[1]
Commercial Mortgages [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Number of Loans Modified as a Troubled Debt Restructuring	0		3		0		5
Pre-Modification Recorded Investment	0	[1]	9,504	[1]	0	[1]	9,956	[1]
Post-Modification Recorded Investment	0	[1]	9,504	[1]	0	[1]	9,876	[1]
Commercial Construction and Development [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		0
Pre-Modification Recorded Investment	0	[1]	0	[1]	0	[1]	0	[1]
Post-Modification Recorded Investment	0	[1]	0	[1]	0	[1]	0	[1]
Commercial Other [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Number of Loans Modified as a Troubled Debt Restructuring	9		5		9		5
Pre-Modification Recorded Investment	763	[1]	1,168	[1]	763	[1]	1,168	[1]
Post-Modification Recorded Investment	763	[1]	1,168	[1]	763	[1]	1,168	[1]
Residential Mortgage [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Number of Loans Modified as a Troubled Debt Restructuring	0		0		2		0
Pre-Modification Recorded Investment	0	[1]	0	[1]	479	[1]	0	[1]
Post-Modification Recorded Investment	0	[1]	0	[1]	479	[1]	0	[1]
Homeowner Construction [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		0
Pre-Modification Recorded Investment	0	[1]	0	[1]	0	[1]	0	[1]
Post-Modification Recorded Investment	0	[1]	0	[1]	0	[1]	0	[1]
Home Equity Lines [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		1
Pre-Modification Recorded Investment	0	[1]	0	[1]	0	[1]	92	[1]
Post-Modification Recorded Investment	0	[1]	0	[1]	0	[1]	92	[1]
Home Equity Loans [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		0
Pre-Modification Recorded Investment	0	[1]	0	[1]	0	[1]	0	[1]
Post-Modification Recorded Investment	0	[1]	0	[1]	0	[1]	0	[1]
Other Consumer [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		0
Pre-Modification Recorded Investment	0	[1]	0	[1]	0	[1]	0	[1]
Post-Modification Recorded Investment	$0	[1]	$0	[1]	$0	[1]	$0	[1]
[1]	The recorded investment in troubled debt restructurings consists of unpaid principal balance, net of charge-offs and unamortized deferred loan origination fees and costs, at the time of the restructuring. For accruing troubled debt restructured loans, the recorded investment also includes accrued interest.

Loans_Troubled_Debt_Restructur1

Loans (Troubled Debt Restructurings Type of Modification) (Details) (USD $)	3 Months Ended				6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Financing Receivable, Modifications [Line Items]	'		'		'		'
Pre-Modification Recorded Investment	$763	[1]	$10,672	[1]	$1,242	[1]	$11,216	[1]
Below market interest rate concession [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Pre-Modification Recorded Investment	77		9,504		77		9,818
Payment deferral [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Pre-Modification Recorded Investment	0		0		479		0
Maturity / amortization concession [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Pre-Modification Recorded Investment	599		0		599		0
Interest only payments [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Pre-Modification Recorded Investment	0		323		0		415
Combination of concessions [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Pre-Modification Recorded Investment	$87	[2]	$845	[2]	$87	[2]	$983	[2]
[1]	The recorded investment in troubled debt restructurings consists of unpaid principal balance, net of charge-offs and unamortized deferred loan origination fees and costs, at the time of the restructuring. For accruing troubled debt restructured loans, the recorded investment also includes accrued interest.
[2]	Loans included in this classification were modified with a combination of any two of the concessions listed in this table.

Loans_Troubled_Debt_Restructur2

Loans (Troubled Debt Restructurings Subsequent Default) (Details) (USD $)	3 Months Ended				6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
	loan		loan		loan		loan
Financing Receivable, Modifications [Line Items]	'		'		'		'
Number of Loans Modified as a Troubled Debt Restructuring	9		8		11		11
Commercial Mortgages [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Number of Loans Modified as a Troubled Debt Restructuring	0		3		0		5
Commercial Construction and Development [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		0
Commercial Other [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Number of Loans Modified as a Troubled Debt Restructuring	9		5		9		5
Residential Mortgage [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Number of Loans Modified as a Troubled Debt Restructuring	0		0		2		0
Homeowner Construction [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		0
Home Equity Lines [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		1
Home Equity Loans [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		0
Other Consumer [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		0
Payment Default [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Number of Loans Modified as a Troubled Debt Restructuring	3		1		3		3
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	254	[1]	482	[1]	254	[1]	749	[1]
Payment Default [Member] | Commercial Mortgages [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Number of Loans Modified as a Troubled Debt Restructuring	0		1		0		2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	[1]	482	[1]	0	[1]	717	[1]
Payment Default [Member] | Commercial Construction and Development [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	[1]	0	[1]	0	[1]	0	[1]
Payment Default [Member] | Commercial Other [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Number of Loans Modified as a Troubled Debt Restructuring	3		0		3		0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	254	[1]	0	[1]	254	[1]	0	[1]
Payment Default [Member] | Residential Mortgage [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	[1]	0	[1]	0	[1]	0	[1]
Payment Default [Member] | Homeowner Construction [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	[1]	0	[1]	0	[1]	0	[1]
Payment Default [Member] | Home Equity Lines [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	[1]	0	[1]	0	[1]	0	[1]
Payment Default [Member] | Home Equity Loans [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	[1]	0	[1]	0	[1]	32	[1]
Payment Default [Member] | Other Consumer [Member]	'		'		'		'
Financing Receivable, Modifications [Line Items]	'		'		'		'
Number of Loans Modified as a Troubled Debt Restructuring	0		0		0		0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	[1]	0	[1]	0	[1]	0	[1]
[1]	The recorded investment in troubled debt restructurings consists of unpaid principal balance, net of charge-offs and unamortized deferred loan origination fees and costs. For accruing troubled debt restructured loans, the recorded investment also includes accrued interest.

Loans_Credit_Quality_Indicator

Loans (Credit Quality Indicators - Commercial) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans Receivable	$1,316,410	$1,301,089
Pass [Member] | Commercial Mortgages [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans Receivable	742,025	756,838
Pass [Member] | Commercial Construction and Development [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans Receivable	38,574	36,289
Pass [Member] | Commercial Other [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans Receivable	535,811	507,962
Special Mention [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans Receivable	38,719	43,072
Special Mention [Member] | Commercial Mortgages [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans Receivable	22,819	23,185
Special Mention [Member] | Commercial Construction and Development [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans Receivable	0	0
Special Mention [Member] | Commercial Other [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans Receivable	15,900	19,887
Classified [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans Receivable	11,041	19,174
Classified [Member] | Commercial Mortgages [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans Receivable	7,928	16,226
Classified [Member] | Commercial Construction and Development [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans Receivable	0	0
Classified [Member] | Commercial Other [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans Receivable	$3,113	$2,948

Loans_Credit_Quality_Indicator1

Loans (Credit Quality Indicators - Residential, Consumer) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Under 90 Days Past Due [Member] | Accruing Residential Mortgage [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans Receivable	$838,770	$740,848
Under 90 Days Past Due [Member] | Nonaccrual Residential Mortgage [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans Receivable	3,082	2,682
Under 90 Days Past Due [Member] | Homeowner Construction [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans Receivable	30,452	23,511
Under 90 Days Past Due [Member] | Residential Segment [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans Receivable	872,304	767,041
Under 90 Days Past Due [Member] | Home Equity Lines [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans Receivable	237,110	231,093
Under 90 Days Past Due [Member] | Home Equity Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans Receivable	45,526	39,864
Under 90 Days Past Due [Member] | Other Consumer [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans Receivable	55,167	55,262
Under 90 Days Past Due [Member] | Consumer Segment [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans Receivable	337,803	326,219
Over 90 Days Past Due [Member] | Accruing Residential Mortgage [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans Receivable	0	0
Over 90 Days Past Due [Member] | Nonaccrual Residential Mortgage [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans Receivable	4,335	5,633
Over 90 Days Past Due [Member] | Homeowner Construction [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans Receivable	0	0
Over 90 Days Past Due [Member] | Residential Segment [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans Receivable	4,335	5,633
Over 90 Days Past Due [Member] | Home Equity Lines [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans Receivable	280	269
Over 90 Days Past Due [Member] | Home Equity Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans Receivable	106	348
Over 90 Days Past Due [Member] | Other Consumer [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans Receivable	126	39
Over 90 Days Past Due [Member] | Consumer Segment [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans Receivable	$512	$656

Allowance_for_Loan_Losses_Allo

Allowance for Loan Losses (Allowance for Loan Losses Rollforward Analysis) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'	'
Allowance, Beginning Balance	$27,043	$31,139	$27,886	$30,873
Charge-offs	-267	-4,175	-1,490	-4,549
Recoveries	43	220	123	260
Provision	450	700	750	1,300
Allowance, Ending Balance	27,269	27,884	27,269	27,884
Commercial Mortgages [Member]	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'	'
Allowance, Beginning Balance	6,547	9,607	6,969	9,407
Charge-offs	-32	-4,000	-977	-4,114
Recoveries	6	186	12	192
Provision	452	955	969	1,263
Allowance, Ending Balance	6,973	6,748	6,973	6,748
Commercial Construction and Development [Member]	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'	'
Allowance, Beginning Balance	269	246	362	224
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	225	31	132	53
Allowance, Ending Balance	494	277	494	277
Commercial Other [Member]	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'	'
Allowance, Beginning Balance	5,201	5,966	5,433	5,996
Charge-offs	-115	-85	-311	-178
Recoveries	20	22	46	44
Provision	348	-461	286	-420
Allowance, Ending Balance	5,454	5,442	5,454	5,442
Commercial Segment [Member]	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'	'
Allowance, Beginning Balance	12,017	15,819	12,764	15,627
Charge-offs	-147	-4,085	-1,288	-4,292
Recoveries	26	208	58	236
Provision	1,025	525	1,387	896
Allowance, Ending Balance	12,921	12,467	12,921	12,467
Residential Segment [Member]	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'	'
Allowance, Beginning Balance	5,087	4,533	4,700	4,269
Charge-offs	-30	-39	-72	-48
Recoveries	0	3	35	3
Provision	-217	194	177	467
Allowance, Ending Balance	4,840	4,691	4,840	4,691
Consumer Segment [Member]	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'	'
Allowance, Beginning Balance	2,565	2,489	2,511	2,684
Charge-offs	-90	-51	-130	-209
Recoveries	17	9	30	21
Provision	77	8	158	-41
Allowance, Ending Balance	2,569	2,455	2,569	2,455
Unallocated [Member]	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'	'
Allowance, Beginning Balance	7,374	8,298	7,911	8,293
Charge-offs	'	'	'	'
Recoveries	'	'	'	'
Provision	-435	-27	-972	-22
Allowance, Ending Balance	$6,939	$8,271	$6,939	$8,271

Allowance_for_Loan_Losses_Allo1

Allowance for Loan Losses (Allowance for Loan Losses by Segment & Impairment Methodology) (Details) (USD $)	Jun. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Loans individually evaluated for impairment	$32,225		$37,493
Loans related allowance individually evaluated for impairment	1,525		1,481
Loans collectively evaluated for impairment	2,548,899		2,425,391
Loans related allowance collectively evaluated for impairment	18,805		18,494
Total loans	2,581,124	[1]	2,462,884	[1]
Allowance	27,269		27,886
Commercial Mortgages [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Loans individually evaluated for impairment	24,893		30,292
Loans related allowance individually evaluated for impairment	747		552
Loans collectively evaluated for impairment	747,879		765,957
Loans related allowance collectively evaluated for impairment	6,226		6,417
Total loans	772,772		796,249
Commercial Construction and Development [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Loans individually evaluated for impairment	0		0
Loans related allowance individually evaluated for impairment	0		0
Loans collectively evaluated for impairment	38,574		36,289
Loans related allowance collectively evaluated for impairment	494		362
Total loans	38,574		36,289
Commercial Other [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Loans individually evaluated for impairment	2,585		2,556
Loans related allowance individually evaluated for impairment	324		463
Loans collectively evaluated for impairment	552,239		528,241
Loans related allowance collectively evaluated for impairment	5,130		4,970
Total loans	554,824		530,797
Residential Segment [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Loans individually evaluated for impairment	4,456		4,290
Loans related allowance individually evaluated for impairment	390		463
Loans collectively evaluated for impairment	872,183		768,384
Loans related allowance collectively evaluated for impairment	4,450		4,237
Consumer Segment [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Loans individually evaluated for impairment	291		355
Loans related allowance individually evaluated for impairment	64		3
Loans collectively evaluated for impairment	338,024		326,520
Loans related allowance collectively evaluated for impairment	2,505		2,508
Unallocated [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Total loans	0		0
Allowance	$6,939		$7,911
[1]	Includes net unamortized loan origination costs of $1.5 million and $879 thousand, respectively, and net unamortized premiums on purchased loans of $100 thousand and $99 thousand, respectively, at June 30, 2014 and December 31, 2013.

Time_Certificates_of_Deposit_T1

Time Certificates of Deposit (Time Deposits Narrative) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Deposits [Abstract]	'	'
Time deposits	$796,255,000	$790,762,000
Wholesale Brokered Time Certificates of Deposit	171,200,000	98,000,000
Wholesale Brokered Time Deposits Utilized As Replacement Funding	$80,000,000	'

Time_Certificates_of_Deposit_S

Time Certificates of Deposit (Schedule of Time Certifcates of Deposit Maturities) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Deposits [Abstract]	'	'
Time deposits amounts scheduled to mature through the end of the current year	$286,272	'
Time deposits weighted average rate for maturities through the end of the current year	1.25%	'
Time deposits amounts scheduled to mature in year two	209,147	'
Time deposits weighted average rate for maturities in year two	0.95%	'
Time deposits amounts scheduled to mature in year three	127,897	'
Time deposits weighted average rate for maturities in year three	1.20%	'
Time deposits amounts scheduled to mature in year four	83,968	'
Time deposits weighted average rate for maturities in year four	0.86%	'
Time deposits amounts scheduled to mature in year five	50,820	'
Time deposits weighted average rate for maturities in year five	2.01%	'
Time deposits amounts schedule to mature after year five	38,151	'
Time deposits weighted average rate for maturities after year five	0.49%	'
Time deposits	$796,255	$790,762
Time deposits weighted average rate	1.13%	'

Time_Certificates_of_Deposit_S1

Time Certificates of Deposit (Schedule of Time Certificates of Deposit $100 Thousand or More Maturities) (Details) (USD $)	Jun. 30, 2014
In Thousands, unless otherwise specified
Deposits [Abstract]	'
Time deposits $100,000 or more scheduled to mature within 3 months	$122,022
Time deposits $100,000 or more scheduled to mature in 3 to 6 months	43,522
Time deposits $100,000 or more scheduled to mature in 6 to 12 months	54,999
Time deposits $100,000 or more scheduled to mature in one year and beyond	91,951
Time Deposits, $100,000 or More	$312,494

Borrowings_Narrative_Federal_H

Borrowings (Narrative Federal Home Loan Bank Advances) (Details) (USD $)	6 Months Ended
	Jun. 30, 2014	Mar. 03, 2014	Dec. 31, 2013
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]	'	'	'
Federal Home Loan Bank advances	$322,056,000	'	$288,082,000
Federal Home Loan Bank advances, amount of advances prepaid	'	99,300,000	'
Federal Home Loan Bank advances, prepayment penalty charge	6,300,000	'	'
Federal Home Loan Bank of Boston [Member]	'	'	'
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]	'	'	'
Federal Home Loan Bank advances	322,056,000	'	288,082,000
Unused line of credit with FHLB	20,000,000	'	'
Unused line of credit with FHLB	$524,200,000	'	$564,100,000

Borrowings_Federal_Home_Loan_B

Borrowings (Federal Home Loan Bank Advances Maturity Schedule) (Details) (USD $)	Jun. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]	'		'
Federal Home Loan Bank advances	$322,056		$288,082
Federal Home Loan Bank of Boston [Member]	'		'
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]	'		'
Scheduled maturity through the end of the current year	135,759		'
Redeemed at call date maturity through the end of the current year	135,759	[1]	'
Weighted average rate for scheduled maturity through the end of the current year	0.36%	[2]	'
Scheduled maturity in year two	1,569		'
Redeemed at call in year one to two	1,569	[1]	'
Weighted average rate for scheduled maturity in year two	4.89%	[2]	'
Scheduled maturity in year three	43,130		'
Redeemed at call date in year two to three	43,130	[1]	'
Weighted average rate for scheduled maturity in year three	3.10%	[2]	'
Scheduled maturity in year four	41,045		'
Redeemed at call date in year three to four	41,045	[1]	'
Weighted average rate for scheduled maturity in year four	3.16%	[2]	'
Scheduled maturity in year five	64,803		'
Redeemed at call date in year four to five	64,803	[1]	'
Weighted average rate for scheduled maturity in year five	3.85%	[2]	'
Scheduled maturity after year five	35,750		'
Redeemed at call date after year five	35,750	[1]	'
Weighted average rate for scheduled maturity after year five	4.50%	[2]	'
Federal Home Loan Bank advances	322,056		288,082
Total redemption at call date	$322,056	[1]	'
Total weighted average rate	2.27%	[2]	'
[1]	Callable FHLBB advances are shown in the respective periods assuming that the callable debt is redeemed at the call date while all other advances are shown in the periods corresponding to their scheduled maturity date.
[2]	Weighted average rate based on scheduled maturity dates.

Shareholders_Equity_Regulatory

Shareholders' Equity (Regulatory Captial Requirements) (Details) (USD $)	Jun. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Corporation [Member]	'		'
Total Capital (to Risk-Weighted Assets):	'		'
Total Capital	$330,146		$319,486
Total Capital to Risk-Weighted Assets	13.24%		13.29%
Total Capital for Capital Adequacy Purposes	199,489		192,306
Total Capital for Capital Adequacy Purposes to Risk-Weighted Assets	8.00%		8.00%
Total Capital To Be Well Capitalized	249,361		240,382
Total Capital To Be Well Capitalized to Risk Weighted-Assets	10.00%		10.00%
Tier 1 Capital (to Risk-Weighted Assets):	'		'
Tier 1 Capital	302,541		291,292
Tier 1 Capital to Risk Weighted-Assets	12.13%		12.12%
Tier 1 Capital Required For Capital Adequacy Purposes	99,744		96,153
Tier 1 Capital Required for Capital Adequacy Purposes to Risk Weighted-Assets	4.00%		4.00%
Tier 1 Capital Required To Be Well Capitalized	149,616		144,229
Tier 1 Capital Required To Be Well Capitalized to Risk Weighted-Assets	6.00%		6.00%
Tier 1 Capital (to Average Assets):	'		'
Tier 1 Leverage Capital	302,541	[1]	291,292	[1]
Tier 1 Leverage Capital to Average Assets	9.62%	[1]	9.41%	[1]
Tier 1 Leverage Capital Required for Capital Adequacy Purposes	125,796	[1]	123,785	[1]
Tier 1 Leverage Capital Required for Capital Adequacy Purposes to Average Assets	4.00%	[1]	4.00%	[1]
Tier 1 Leverage Capital Required To Be Well Capitalized	157,245	[1]	154,732	[1]
Tier 1 Leverage Capital Required To Be Well Capitalized to Average Assets	5.00%	[1]	5.00%	[1]
Bank [Member]	'		'
Total Capital (to Risk-Weighted Assets):	'		'
Total Capital	325,097		314,458
Total Capital to Risk-Weighted Assets	13.05%		13.09%
Total Capital for Capital Adequacy Purposes	199,343		192,147
Total Capital for Capital Adequacy Purposes to Risk-Weighted Assets	8.00%		8.00%
Total Capital To Be Well Capitalized	249,179		240,184
Total Capital To Be Well Capitalized to Risk Weighted-Assets	10.00%		10.00%
Tier 1 Capital (to Risk-Weighted Assets):	'		'
Tier 1 Capital	297,492		286,264
Tier 1 Capital to Risk Weighted-Assets	11.94%		11.92%
Tier 1 Capital Required For Capital Adequacy Purposes	99,671		96,074
Tier 1 Capital Required for Capital Adequacy Purposes to Risk Weighted-Assets	4.00%		4.00%
Tier 1 Capital Required To Be Well Capitalized	149,507		144,111
Tier 1 Capital Required To Be Well Capitalized to Risk Weighted-Assets	6.00%		6.00%
Tier 1 Capital (to Average Assets):	'		'
Tier 1 Leverage Capital	297,492	[1]	286,264	[1]
Tier 1 Leverage Capital to Average Assets	9.47%	[1]	9.26%	[1]
Tier 1 Leverage Capital Required for Capital Adequacy Purposes	125,633	[1]	123,633	[1]
Tier 1 Leverage Capital Required for Capital Adequacy Purposes to Average Assets	4.00%	[1]	4.00%	[1]
Tier 1 Leverage Capital Required To Be Well Capitalized	$157,041	[1]	$154,541	[1]
Tier 1 Leverage Capital Required To Be Well Capitalized to Average Assets	5.00%	[1]	5.00%	[1]
[1]	Leverage ratio

Derivative_Financial_Instrumen3

Derivative Financial Instruments (Narrative) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Interest Rate Swap [Member]	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Notional Amount	$22,681	$22,681
Interest Rate Swap with customers [Member]	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Notional Amount	110,821	105,582
Interest Rate Swap with customers [Member] | Interest Rate Swap [Member]	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Notional Amount	110,821	105,582
Mirror swaps with counterparties [Member]	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Notional Amount	110,821	105,582
Mirror swaps with counterparties [Member] | Interest Rate Swap [Member]	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Notional Amount	110,821	105,582
Derivatives Designated as Cash Flow Hedging Instruments [Member] | Interest Rate Swap [Member]	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Number of Instruments Held	2	2
Pledged collateral to derivative counterparties	$939	$1,600

Derivative_Financial_Instrumen4

Derivative Financial Instruments (Fair Value of Derivatives by Balance Sheet Location) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Other assets [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Total derivative assets	$4,173	$3,135
Other liabilities [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Total derivative liabilities	5,657	4,298
Interest Rate Swap [Member] | Other assets [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative asset designated as a cash flow hedge	0	0
Interest Rate Swap [Member] | Other liabilities [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative liability designated as a cash flow hedge	773	1,012
Forward Loan Commitments Interest Rate Commitments [Member] | Other assets [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative asset not designated	998	392
Forward Loan Commitments Interest Rate Commitments [Member] | Other liabilities [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative liability not designated	3	0
Forward Contracts [Member] | Other assets [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative asset not designated	16	10
Forward Contracts [Member] | Other liabilities [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative liability not designated	1,655	583
Interest Rate Swap with customers [Member] | Other assets [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative asset not designated	3,046	2,403
Interest Rate Swap with customers [Member] | Other liabilities [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative liability not designated	101	297
Mirror swaps with counterparties [Member] | Other assets [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative asset not designated	113	330
Mirror swaps with counterparties [Member] | Other liabilities [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative liability not designated	$3,125	$2,406

Derivative_Financial_Instrumen5

Derivative Financial Instruments (Derivatives in Cash Flow Hedging Relationships, Effect in Statements of Income and Changes in Shareholders' Equity) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Gain (Loss) Recognized in Income (Ineffective Portion)	$0	$0	$0	$0
Gain (Loss) Recognized in Other Comprehensive Income (Effective Portion)	79	152	155	272
Interest Rate Swap [Member] | Cash Flow Hedge [Member] | Interest Expense [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Gain (Loss) Recognized in Income (Ineffective Portion)	0	0	0	0
Interest Rate Swap [Member] | Cash Flow Hedge [Member] | Other Comprehensive Income (Loss) [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Gain (Loss) Recognized in Other Comprehensive Income (Effective Portion)	$79	$152	$155	$272

Derivative_Financial_Instrumen6

Derivative Financial Instruments (Derivatives not Designated as Hedging Instruments, Effect in Statements of Income) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Gain (Loss) Recognized in Income	$0	$0	$0	$0
Derivatives not Designated as Hedging Instruments [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Gain (Loss) Recognized in Income	-464	1,050	-240	2,122
Forward Loan Commitments Interest Rate Commitments [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Gain (Loss) Recognized in Income	326	-855	603	-1,773
Forward Loan Commitments Interest Rate Commitments [Member] | Net gains on loan sales and commissions on loans originated for others [Member] | Derivatives not Designated as Hedging Instruments [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Gain (Loss) Recognized in Income	326	-855	603	-1,773
Forward Contracts [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Gain (Loss) Recognized in Income	-753	1,753	-1,066	3,724
Forward Contracts [Member] | Net gains on loan sales and commissions on loans originated for others [Member] | Derivatives not Designated as Hedging Instruments [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Gain (Loss) Recognized in Income	-753	1,753	-1,066	3,724
Interest Rate Swap with customers [Member] | Net gains (losses) on interest rate swaps [Member] | Derivatives not Designated as Hedging Instruments [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Gain (Loss) Recognized in Income	1,120	-407	2,150	-411
Mirror swaps with counterparties [Member] | Net gains (losses) on interest rate swaps [Member] | Derivatives not Designated as Hedging Instruments [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Gain (Loss) Recognized in Income	($1,157)	$559	($1,927)	$582

Fair_Value_Measurements_Narrat

Fair Value Measurements (Narrative) (Details) (USD $)	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Allowance for loan losses	$27,269	$27,043	$27,886	$27,884	$31,139	$30,873
Collateral Dependent Impaired Loans [Member] | Nonrecurring [Member] | Level 3 [Member]	'	'	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Allowance for loan losses	$912	'	$453	'	'	'

Fair_Value_Measurements_Fair_V

Fair Value Measurements (Fair Value Mortgage Loans Held For Sale Disclosures) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'	'
Mortgage loans held for sale, amortized cost	$21,800,000	$11,500,000
Mortgage loans held for sale, at fair value	22,407,000	11,636,000
Mortgage Loans Held for Sale Difference between Fair Value and Principal Amount	$644,000	$181,000

Fair_Value_Measurements_Fair_V1

Fair Value Measurements (Fair Value Mortgage Loans Held For Sale, Commitments to Originate And Commitments to Sell Changes in Fair Value Disclosures) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Gain (loss) on mortgage loans held for sale	$387	($898)	$463	($1,959)
Gain (Loss) Recognized in Income	0	0	0	0
Total change in fair value	-40	0	0	-8
Forward Loan Commitments Interest Rate Commitments [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Gain (Loss) Recognized in Income	326	-855	603	-1,773
Forward Contracts [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Gain (Loss) Recognized in Income	($753)	$1,753	($1,066)	$3,724

Fair_Value_Measurements_Assets

Fair Value Measurements (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) (USD $)	Jun. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	$327,578		$392,903
Obligations of U.S. government-sponsored enterprises [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	10,012		55,115
Mortgage-backed securities issued by US Government-sponsored enterprises [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	228,285		238,355
Obligations of states and political subdivisions [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	56,391		62,859
Trust preferred securities: Individual name issuers [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	26,635		24,684
Trust preferred securities: Collateralized debt obligations [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	'		547
Corporate bonds [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	6,255		11,343
Recurring [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Mortgage loans held for sale	22,407		11,636
Total assets at fair value on a recurring basis	354,158		407,674
Total liabilities at fair value on a recurring basis	5,657		4,298
Recurring [Member] | Interest Rate Swap with customers [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Derivative asset	3,159	[1]	2,733	[1]
Recurring [Member] | Forward Loan Commitments, Assets [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Derivative asset	1,014	[1]	402	[1]
Recurring [Member] | Mirror swaps with counterparties [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Derivative liability	3,226	[1]	2,703	[1]
Recurring [Member] | Interest Rate Swap [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Derivative liability	773	[1]	1,012	[1]
Recurring [Member] | Forward Loan Commitments, Liabilities [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Derivative liability	1,658	[1]	583	[1]
Recurring [Member] | Obligations of U.S. government-sponsored enterprises [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	10,012		55,115
Recurring [Member] | Mortgage-backed securities issued by US Government-sponsored enterprises [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	228,285		238,355
Recurring [Member] | Obligations of states and political subdivisions [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	56,391		62,859
Recurring [Member] | Trust preferred securities: Individual name issuers [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	26,635		24,684
Recurring [Member] | Trust preferred securities: Collateralized debt obligations [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	'		547
Recurring [Member] | Corporate bonds [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	6,255		11,343
Recurring [Member] | Level 1 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Mortgage loans held for sale	0		0
Total assets at fair value on a recurring basis	0		0
Total liabilities at fair value on a recurring basis	0		0
Recurring [Member] | Level 1 [Member] | Interest Rate Swap with customers [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Derivative asset	0	[1]	0	[1]
Recurring [Member] | Level 1 [Member] | Forward Loan Commitments, Assets [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Derivative asset	0	[1]	0	[1]
Recurring [Member] | Level 1 [Member] | Mirror swaps with counterparties [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Derivative liability	0	[1]	0	[1]
Recurring [Member] | Level 1 [Member] | Interest Rate Swap [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Derivative liability	0	[1]	0	[1]
Recurring [Member] | Level 1 [Member] | Forward Loan Commitments, Liabilities [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Derivative liability	0	[1]	0	[1]
Recurring [Member] | Level 1 [Member] | Obligations of U.S. government-sponsored enterprises [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	0		0
Recurring [Member] | Level 1 [Member] | Mortgage-backed securities issued by US Government-sponsored enterprises [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	0		0
Recurring [Member] | Level 1 [Member] | Obligations of states and political subdivisions [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	0		0
Recurring [Member] | Level 1 [Member] | Trust preferred securities: Individual name issuers [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	0		0
Recurring [Member] | Level 1 [Member] | Trust preferred securities: Collateralized debt obligations [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	'		0
Recurring [Member] | Level 1 [Member] | Corporate bonds [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	0		0
Recurring [Member] | Level 2 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Mortgage loans held for sale	22,407		11,636
Total assets at fair value on a recurring basis	354,158		407,674
Total liabilities at fair value on a recurring basis	5,657		4,298
Recurring [Member] | Level 2 [Member] | Interest Rate Swap with customers [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Derivative asset	3,159	[1]	2,733	[1]
Recurring [Member] | Level 2 [Member] | Forward Loan Commitments, Assets [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Derivative asset	1,014	[1]	402	[1]
Recurring [Member] | Level 2 [Member] | Mirror swaps with counterparties [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Derivative liability	3,226	[1]	2,703	[1]
Recurring [Member] | Level 2 [Member] | Interest Rate Swap [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Derivative liability	773	[1]	1,012	[1]
Recurring [Member] | Level 2 [Member] | Forward Loan Commitments, Liabilities [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Derivative liability	1,658	[1]	583	[1]
Recurring [Member] | Level 2 [Member] | Obligations of U.S. government-sponsored enterprises [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	10,012		55,115
Recurring [Member] | Level 2 [Member] | Mortgage-backed securities issued by US Government-sponsored enterprises [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	228,285		238,355
Recurring [Member] | Level 2 [Member] | Obligations of states and political subdivisions [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	56,391		62,859
Recurring [Member] | Level 2 [Member] | Trust preferred securities: Individual name issuers [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	26,635		24,684
Recurring [Member] | Level 2 [Member] | Trust preferred securities: Collateralized debt obligations [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	'		547
Recurring [Member] | Level 2 [Member] | Corporate bonds [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	6,255		11,343
Recurring [Member] | Level 3 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Mortgage loans held for sale	0		0
Total assets at fair value on a recurring basis	0		0
Total liabilities at fair value on a recurring basis	0		0
Recurring [Member] | Level 3 [Member] | Interest Rate Swap with customers [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Derivative asset	0	[1]	0	[1]
Recurring [Member] | Level 3 [Member] | Forward Loan Commitments, Assets [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Derivative asset	0	[1]	0	[1]
Recurring [Member] | Level 3 [Member] | Mirror swaps with counterparties [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Derivative liability	0	[1]	0	[1]
Recurring [Member] | Level 3 [Member] | Interest Rate Swap [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Derivative liability	0	[1]	0	[1]
Recurring [Member] | Level 3 [Member] | Forward Loan Commitments, Liabilities [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Derivative liability	0	[1]	0	[1]
Recurring [Member] | Level 3 [Member] | Obligations of U.S. government-sponsored enterprises [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	0		0
Recurring [Member] | Level 3 [Member] | Mortgage-backed securities issued by US Government-sponsored enterprises [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	0		0
Recurring [Member] | Level 3 [Member] | Obligations of states and political subdivisions [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	0		0
Recurring [Member] | Level 3 [Member] | Trust preferred securities: Individual name issuers [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	0		0
Recurring [Member] | Level 3 [Member] | Trust preferred securities: Collateralized debt obligations [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	'		0
Recurring [Member] | Level 3 [Member] | Corporate bonds [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available for sale securities	$0		$0
[1]	Derivative assets are included in other assets and derivative liabilities are reported in other liabilities in the Consolidated Balance Sheets.

Fair_Value_Measurements_Schedu

Fair Value Measurements (Schedule of Changes in Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) (Recurring [Member], Level 3 [Member], USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2013		Jun. 30, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'
Balance at beginning of period	$8,407		$10,514
Gains and losses (realized and unrealized): included in earnings	0	[1]	-2,780	[1]
Gains and losses (realized and unrealized): Included in other comprehensive income	-7		2,459
Purchases	0		0
Issuances	-5,176		12,692
Sales	-2,827		-22,355
Settlements	0		-133
Transfers into level 3	0		0
Transfers out of Level 3	0		0
Balance at end of period	397		397
Securities Available for Sale [Member]	'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'
Balance at beginning of period	404	[2]	843	[2]
Gains and losses (realized and unrealized): Included in earnings	0	[1],[2]	-2,772	[1],[2]
Gains and losses (realized and unrealized): Included in other comprehensive income	-7	[2]	2,459	[2]
Purchases	0	[2]	0	[2]
Issuances	0	[2]	0	[2]
Sales	0	[2]	0	[2]
Settlements	0	[2]	-133	[2]
Transfers into level 3	0	[2]	0	[2]
Transfers out of Level 3	0	[2]	0	[2]
Balance at end of period	397	[2]	397	[2]
Mortgage loans held for sale [Member]	'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'
Balance at beginning of period	7,955	[3]	9,813	[3]
Gains and losses (realized and unrealized): Included in earnings	48	[1],[3]	-150	[1],[3]
Gains and losses (realized and unrealized): Included in other comprehensive income	0	[3]	0	[3]
Purchases	0	[3]	0	[3]
Issuances	-5,176	[3]	12,692	[3]
Sales	-2,827	[3]	-22,355	[3]
Settlements	0	[3]	0	[3]
Transfers into level 3	0	[3]	0	[3]
Transfers out of Level 3	0	[3]	0	[3]
Balance at end of period	0	[3]	0	[3]
Derivative Assets / Liabilities [Member]	'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'
Balance at beginning of period	48	[4]	-142	[4]
Gains and losses (realized and unrealized): included in earnings	-48	[1],[4]	142	[1],[4]
Gains and losses (realized and unrealized): Included in other comprehensive income	0	[4]	0	[4]
Purchases	0	[4]	0	[4]
Issuances	0	[4]	0	[4]
Sales	0	[4]	0	[4]
Settlements	0	[4]	0	[4]
Transfers into level 3	0	[4]	0	[4]
Transfers out of Level 3	0	[4]	0	[4]
Balance at end of period	$0	[4]	$0	[4]
[1]	Losses included in earnings for Level 3 securities available for sale were included in net impairment losses recognized in earnings in the Consolidated Income Statement. Losses included in earnings for Level 3 mortgage loans held for sale and derivative assets and liabilities were included in net gains on loan sales and commissions on loans originated for others in the Consolidated Statements of Income.
[2]	Level 3 securities available for sale were comprised of pooled trust preferred debt securities in the form of collateralized debt obligations.
[3]	Level 3 mortgage loans held for sale consisted of certain mortgage loans whose fair value was determined utilizing a discounted cash flow analysis.
[4]	Level 3 derivative assets / liabilities consisted of forward loan commitments (interest rate lock commitments and commitments to sell residential real estate mortgages) whose fair value was determined utilizing a discounted cash flow analysis.

Fair_Value_Measurements_Asset_

Fair Value Measurements (Asset and Liabilities Measured on a Nonrecurring Basis) (Details) (USD $)	Jun. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Impaired Loans	$19,892	[1]	$34,318	[1]
Nonrecurring [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Property acquired through foreclosure or repossession	492		435
Total assets at fair value on a nonrecurring basis	7,135		11,612
Nonrecurring [Member] | Level 1 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Property acquired through foreclosure or repossession	0		0
Total assets at fair value on a nonrecurring basis	0		0
Nonrecurring [Member] | Level 2 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Property acquired through foreclosure or repossession	0		0
Total assets at fair value on a nonrecurring basis	0		0
Nonrecurring [Member] | Level 3 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Property acquired through foreclosure or repossession	492		435
Total assets at fair value on a nonrecurring basis	7,135		11,612
Collateral Dependent Impaired Loans [Member] | Nonrecurring [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Impaired Loans	6,643		11,177
Collateral Dependent Impaired Loans [Member] | Nonrecurring [Member] | Level 1 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Impaired Loans	0		0
Collateral Dependent Impaired Loans [Member] | Nonrecurring [Member] | Level 2 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Impaired Loans	0		0
Collateral Dependent Impaired Loans [Member] | Nonrecurring [Member] | Level 3 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Impaired Loans	$6,643		$11,177
[1]	The recorded investment in impaired loans consists of unpaid principal balance, net of charge-offs, interest payments received applied to principal and unamortized deferred loan origination fees and costs. For impaired accruing loans (troubled debt restructurings for which management has concluded that the collectibility of the loan is not in doubt), the recorded investment also includes accrued interest.

Fair_Value_Measurements_Quanti

Fair Value Measurements (Quantitative Information About Level 3 Assets Measured at Fair Value on a Nonrecurring Basis) (Details) (USD $)	6 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
Impaired Loans	19,892	[1]	34,318	[1]
Nonrecurring [Member]	'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
Property acquired through foreclosure or repossession	492		435
Nonrecurring [Member] | Level 3 [Member]	'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
Property acquired through foreclosure or repossession	492		435
Nonrecurring [Member] | Collateral Dependent Impaired Loans [Member]	'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
Impaired Loans	6,643		11,177
Nonrecurring [Member] | Collateral Dependent Impaired Loans [Member] | Level 3 [Member]	'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
Impaired Loans	6,643		11,177
Nonrecurring [Member] | Minimum [Member] | Collateral Dependent Impaired Loans [Member] | Appraisals Of Collateral [Member] | Level 3 [Member]	'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
Discount For Costs To Sell	10.00%		1.00%
Appraisal Adjustments	0.00%	[2]	0.00%	[2]
Nonrecurring [Member] | Minimum [Member] | Property Acquired Through Foreclosure Or Repossession [Member] | Appraisals Of Collateral [Member] | Level 3 [Member]	'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
Discount For Costs To Sell	0.00%		2.00%
Appraisal Adjustments	15.00%	[2]	0.00%	[2]
Nonrecurring [Member] | Maximum [Member] | Collateral Dependent Impaired Loans [Member] | Appraisals Of Collateral [Member] | Level 3 [Member]	'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
Discount For Costs To Sell	25.00%		45.00%
Appraisal Adjustments	40.00%	[2]	50.00%	[2]
Nonrecurring [Member] | Maximum [Member] | Property Acquired Through Foreclosure Or Repossession [Member] | Appraisals Of Collateral [Member] | Level 3 [Member]	'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
Discount For Costs To Sell	10.00%		10.00%
Appraisal Adjustments	22.00%	[2]	22.00%	[2]
Nonrecurring [Member] | Weighted Average [Member] | Collateral Dependent Impaired Loans [Member] | Appraisals Of Collateral [Member] | Level 3 [Member]	'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
Discount For Costs To Sell	11.00%		11.00%
Appraisal Adjustments	5.00%	[2]	2.00%	[2]
Nonrecurring [Member] | Weighted Average [Member] | Property Acquired Through Foreclosure Or Repossession [Member] | Appraisals Of Collateral [Member] | Level 3 [Member]	'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
Discount For Costs To Sell	7.00%		9.00%
Appraisal Adjustments	15.00%	[2]	13.00%	[2]
[1]	The recorded investment in impaired loans consists of unpaid principal balance, net of charge-offs, interest payments received applied to principal and unamortized deferred loan origination fees and costs. For impaired accruing loans (troubled debt restructurings for which management has concluded that the collectibility of the loan is not in doubt), the recorded investment also includes accrued interest.
[2]	Management may adjust appraisal values to reflect market value declines or other discounts resulting from its knowledge of the property.

Fair_Value_Measurements_Carryi

Fair Value Measurements (Carrying Amounts and Estimated Fair Values of Financial Instruments) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Held to maturity securities	$27,814	$29,905
Loans, net of allowance of loan losses	2,553,855	2,434,998
Time deposits	796,255	790,762
Federal Home Loan Bank advances	322,056	288,082
Junior subordinated debentures	22,681	22,681
Reported Value Measurement [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Held to maturity securities	27,814	29,905
Loans, net of allowance of loan losses	2,553,855	2,434,998
Loan servicing rights	2,868	2,698
Time deposits	796,255	790,762
Federal Home Loan Bank advances	322,056	288,082
Junior subordinated debentures	22,681	22,681
Estimate of Fair Value Measurement [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Held to maturity securities	28,618	29,865
Loans, net of allowance of loan losses	2,604,038	2,479,527
Loan servicing rights	3,188	2,767
Time deposits	798,437	797,748
Federal Home Loan Bank advances	337,519	308,317
Junior subordinated debentures	17,704	16,282
Estimate of Fair Value Measurement [Member] | Level 1 [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Held to maturity securities	0	0
Loans, net of allowance of loan losses	0	0
Loan servicing rights	0	0
Time deposits	0	0
Federal Home Loan Bank advances	0	0
Junior subordinated debentures	0	0
Estimate of Fair Value Measurement [Member] | Level 2 [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Held to maturity securities	28,618	29,865
Loans, net of allowance of loan losses	0	0
Loan servicing rights	0	0
Time deposits	798,437	797,748
Federal Home Loan Bank advances	337,519	308,317
Junior subordinated debentures	17,704	16,282
Estimate of Fair Value Measurement [Member] | Level 3 [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Held to maturity securities	0	0
Loans, net of allowance of loan losses	2,604,038	2,479,527
Loan servicing rights	3,188	2,767
Time deposits	0	0
Federal Home Loan Bank advances	0	0
Junior subordinated debentures	$0	$0

Defined_Benefit_Pension_Plans_2

Defined Benefit Pension Plans (Narrative) (Details)	120 Months Ended
	Dec. 31, 2023
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]	'
Transition Period Pension Plan Amendment	'10 years

Defined_Benefit_Pension_Plans_3

Defined Benefit Pension Plans (Components of Net Periodic Benefit Cost) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Qualified Pension Plan [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Service Cost	$538	$731	$1,076	$1,461
Interest Cost	722	719	1,445	1,438
Expected Return on Plan Assets	-1,015	-924	-2,031	-1,849
Amortization of Prior Service Cost	-5	-9	-11	-17
Recognized Net Actuarial Loss	115	414	230	828
Net Periodic Benefit Cost	355	931	709	1,861
Non-Qualified Retirement Plans [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Service Cost	11	49	23	99
Interest Cost	119	115	239	230
Expected Return on Plan Assets	0	0	0	0
Amortization of Prior Service Cost	0	0	0	0
Recognized Net Actuarial Loss	19	49	35	98
Net Periodic Benefit Cost	$149	$213	$297	$427

ShareBased_Compensation_Arrang1

Share-Based Compensation Arrangements (Nonvested Shares) (Details) (Time Based Nonvested Shares [Member], USD $)	6 Months Ended
	Jun. 30, 2014
Time Based Nonvested Shares [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Nonvested share units	5,880
Award Vesting Period	'3 years
Grant date fair value	$36.12

ShareBased_Compensation_Arrang2

Share-Based Compensation Arrangements (Nonvested Performance Shares) (Details) (Performance Based Nonvested Shares [Member], USD $)	6 Months Ended
	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Grant date fair value	$34.66
Award Vesting Period	'3 years
Performance share awards, shares vesting percentage	140.00%
Performance share awards, shares vesting	21,140
Minimum [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Equity Instruments Other than Options Minimum Shares Earned to Target Percentage	0.00%
Maximum [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Equity Instruments Other than Options Maximum Shares Earned to Target Percentage	200.00%

Business_Segments_Statement_of

Business Segments (Statement of Operations and Total Assets by Reportable Segment) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Segment Reporting Information [Line Items]	'	'	'	'	'
Net interest income	$24,468	$22,409	$48,304	$44,876	'
Noninterest income	12,814	16,394	32,184	29,560	'
Net interest income after provision for loan losses	24,018	21,709	47,554	43,576	'
Provision for loan losses	450	700	750	1,300	'
Depreciation and amortization	945	1,003	1,892	2,023	'
Other noninterest expenses related to segments	21,503	24,002	49,848	47,166	'
Total noninterest expense	22,448	25,005	51,740	49,189	'
Income before income taxes	14,384	13,098	27,998	23,947	'
Income tax expense	4,587	4,115	8,903	7,543	'
Net income	9,797	8,983	19,095	16,404	'
Total assets	3,317,022	3,061,307	3,317,022	3,061,307	3,188,867
Expenditures for long-lived assets	1,390	410	2,681	837	'
Commercial Banking [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Net interest income	19,799	19,731	39,538	39,242	'
Noninterest income	3,860	7,991	8,401	15,937	'
Net interest income after provision for loan losses	19,349	19,031	38,788	37,942	'
Provision for loan losses	450	700	750	1,300	'
Depreciation and amortization	621	624	1,206	1,262	'
Other noninterest expenses related to segments	13,219	16,268	26,772	31,404	'
Total noninterest expense	13,840	16,892	27,978	32,666	'
Income before income taxes	9,369	10,130	19,211	21,213	'
Income tax expense	3,102	3,402	6,363	7,898	'
Net income	6,267	6,728	12,848	13,315	'
Total assets	2,704,109	2,509,407	2,704,109	2,509,407	'
Expenditures for long-lived assets	1,308	367	2,383	737	'
Wealth Management Services [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Net interest income	-7	2	-11	9	'
Noninterest income	8,530	7,912	16,595	15,386	'
Net interest income after provision for loan losses	-7	2	-11	9	'
Provision for loan losses	0	0	0	0	'
Depreciation and amortization	272	325	583	652	'
Other noninterest expenses related to segments	5,482	5,022	10,869	10,134	'
Total noninterest expense	5,754	5,347	11,452	10,786	'
Income before income taxes	2,769	2,567	5,132	4,609	'
Income tax expense	1,018	949	1,894	1,815	'
Net income	1,751	1,618	3,238	2,794	'
Total assets	53,303	52,129	53,303	52,129	'
Expenditures for long-lived assets	65	28	236	54	'
Corporate Segment [Member]	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'
Net interest income	4,676	2,676	8,777	5,625	'
Noninterest income	424	491	7,188	-1,763	'
Net interest income after provision for loan losses	4,676	2,676	8,777	5,625	'
Provision for loan losses	0	0	0	0	'
Depreciation and amortization	52	54	103	109	'
Other noninterest expenses related to segments	2,802	2,712	12,207	5,628	'
Total noninterest expense	2,854	2,766	12,310	5,737	'
Income before income taxes	2,246	401	3,655	-1,875	'
Income tax expense	467	-236	646	-2,170	'
Net income	1,779	637	3,009	295	'
Total assets	559,610	499,771	559,610	499,771	'
Expenditures for long-lived assets	$17	$15	$62	$46	'

Other_Comprehensive_Income_Act

Other Comprehensive Income (Activity in Other Comprehensive Income) (Details) (USD $)	3 Months Ended				6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]	'		'		'		'
Changes in fair value of securities available for sale, before tax	$2,837		($5,958)		$3,801		($7,569)
Changes in fair value of securities available for sale, tax	1,020		-2,137		1,372		-2,695
Changes in fair value in securities available for sale	1,817		-3,821		2,429		-4,874
Net losses (gains) on securities reclassified into earnings, before tax	0	[1]	0	[1]	0	[1]	613	[1]
Net losses (gains) on securities reclassified into earnings, tax	0	[1]	0	[1]	0	[1]	220	[1]
Net losses (gains) on securities reclassified into earnings	0	[1]	0	[1]	0	[1]	393	[1]
Net change in fair value of securities available for sale, before tax	2,837		-5,958		3,801		-6,956
Net change in fair value of securities available for sale, tax	1,020		-2,137		1,372		-2,475
Net change in fair value of securities available for sale	1,817		-3,821		2,429		-4,481
Reclassification adjustment for other-than-temporary impariment losses transferred into earnings, before tax	0	[2]	0	[2]	0	[2]	2,159	[2]
Reclassification adjustment for other-than-temporary impairment losses transferred into earnings, tax	0	[2]	0	[2]	0	[2]	775	[2]
Reclassification adjustment for other-than-temporary impairment losses transferred into earnings	0	[2]	0	[2]	0	[2]	1,384	[2]
Change in fair value of cash flow hedges, before tax	19		52		-24		45
Change in fair value of cash flow hedges, tax	33		18		6		13
Change in fair value of cash flow hedges	-14		34		-30		32
Net cash flow hedge losses reclassified into earnings, before tax	145	[3]	184	[3]	290	[3]	374	[3]
Net cash flow hedge losses reclassified into earnings, tax	52	[3]	66	[3]	105	[3]	134	[3]
Net cash flow hedge losses reclassified into earnings	93	[3]	118	[3]	185	[3]	240	[3]
Net change in fair value of cash flow hedges, before tax	164		236		266		419
Net change in fair value of cash flow hedges, tax	85		84		111		147
Net change in fair value of cash flow hedges	79		152		155		272
Defined benefit plan obligation adjustment, before tax	127	[4]	454	[4]	254	[4]	909	[4]
Defined benefit plan obligation adjustment, tax	46	[4]	162	[4]	85	[4]	280	[4]
Defined benefit plan obligation adjustment, net of tax	81	[4]	292	[4]	169	[4]	629	[4]
Total other comprehensive (loss) income, before tax	3,128		-5,268		4,321		-3,469
Total other comprehensive (loss) income, tax	1,151		-1,891		1,568		-1,273
Total other comprehensive (loss) income, net of tax	$1,977		($3,377)		$2,753		($2,196)
[1]	Reported as total other-than-temporary impairment losses on securities in the Consolidated Statements of Income.
[2]	Reported as the portion of loss recognized in other comprehensive income in the Consolidated Statements of Income.
[3]	Included in interest expense on junior subordinated debentures in the Consolidated Statements of Income.
[4]	Included in salaries and employee benefits expense in the Consolidated Statements of Income.

Other_Comprehensive_Income_Com

Other Comprehensive Income (Components of Accumulated Other Comprehensive Income) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Accumulated other comprehensive gain (loss), beginning balance	'	'	($1,553)	($10,499)
Other Comprehensive Income Before Reclassifcations	'	'	2,399	-4,842
Amounts reclassed from accumulated other comprehensive income	'	'	354	2,646
Net other comprehensive income (loss)	1,977	-3,377	2,753	-2,196
Accumulated other comprehensive gain (loss), ending balance	1,200	-12,695	1,200	-12,695
Net Unrealized Gains on AFS Securities [Member]	'	'	'	'
Accumulated other comprehensive gain (loss), beginning balance	'	'	3,089	9,711
Other Comprehensive Income Before Reclassifcations	'	'	2,429	-4,874
Amounts reclassed from accumulated other comprehensive income	'	'	0	393
Net other comprehensive income (loss)	'	'	2,429	-4,481
Accumulated other comprehensive gain (loss), ending balance	5,518	5,230	5,518	5,230
Noncredit-related Impairment [Member]	'	'	'	'
Accumulated other comprehensive gain (loss), beginning balance	'	'	112	-1,938
Other Comprehensive Income Before Reclassifcations	'	'	0	0
Amounts reclassed from accumulated other comprehensive income	'	'	0	1,384
Net other comprehensive income (loss)	'	'	0	1,384
Accumulated other comprehensive gain (loss), ending balance	112	-554	112	-554
Net Unrealized Losses on Cash Flow Hedges [Member]	'	'	'	'
Accumulated other comprehensive gain (loss), beginning balance	'	'	-618	-1,006
Other Comprehensive Income Before Reclassifcations	'	'	-30	32
Amounts reclassed from accumulated other comprehensive income	'	'	185	240
Net other comprehensive income (loss)	'	'	155	272
Accumulated other comprehensive gain (loss), ending balance	-463	-734	-463	-734
Pension Benefit Adjustment [Member]	'	'	'	'
Accumulated other comprehensive gain (loss), beginning balance	'	'	-4,136	-17,266
Other Comprehensive Income Before Reclassifcations	'	'	0	0
Amounts reclassed from accumulated other comprehensive income	'	'	169	629
Net other comprehensive income (loss)	'	'	169	629
Accumulated other comprehensive gain (loss), ending balance	($3,967)	($16,637)	($3,967)	($16,637)

Earnings_Per_Common_Share_Calc

Earnings Per Common Share (Calculation of Earnings Per Share) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share [Abstract]	'	'	'	'
Net income	$9,797	$8,983	$19,095	$16,404
Dividends and undistributed earnings allocated to participating securities	-33	-39	-74	-78
Net income applicable to common shareholders	$9,764	$8,944	$19,021	$16,326
Weighted average common shares outstanding - basic	16,678	16,454	16,653	16,428
Dilutive effect of common stock equivalents	153	127	164	130
Weighted average common shares outstanding - diluted	16,831	16,581	16,817	16,558
Basic earnings per common share	$0.59	$0.54	$1.14	$0.99
Diluted earnings per common share	$0.58	$0.54	$1.13	$0.99
Antidilutive common stock equivalents	55	241	55	394

Commitments_and_Contingencies_2

Commitments and Contingencies (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Commitments and Contingencies Disclosure [Line Items]	'	'	'	'	'
Operating leases rental expense	$744	$672	$1,500	$1,300	'
Unpaid Principal Balance of Loans Repurchased	303	'	303	'	682
Reserve For Loan Repurchases	$275	'	$275	'	$275
Minimum [Member]	'	'	'	'	'
Commitments and Contingencies Disclosure [Line Items]	'	'	'	'	'
Lease Expiration Period	'	'	'1 month	'	'
Lease Expiration Period, Renewal Option	'	'	'9 months	'	'
Maximum [Member]	'	'	'	'	'
Commitments and Contingencies Disclosure [Line Items]	'	'	'	'	'
Lease Expiration Period	'	'	'25 years	'	'
Lease Expiration Period, Renewal Option	'	'	'25 years	'	'

Commitments_and_Contingencies_3

Commitments and Contingencies (Financial Instruments with Off Balance Sheet Risk) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Forward Loan Commitments Interest Rate Commitments [Member]	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Notional Amount	$28,509	$17,910
Forward Contracts [Member]	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Notional Amount	50,272	29,364
Interest Rate Swap with customers [Member]	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Notional Amount	110,821	105,582
Mirror swaps with counterparties [Member]	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Notional Amount	110,821	105,582
Interest Rate Swap [Member]	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Notional Amount	22,681	22,681
Commitments to extend credit on commerical loans [Member] | Commitments to Extend Credit [Member]	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Contract amount	319,422	259,061
Commitments to extend credit on home equity lines [Member] | Commitments to Extend Credit [Member]	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Contract amount	198,343	198,432
Commitments to extend credit on other loans [Member] | Commitments to Extend Credit [Member]	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Contract amount	47,827	35,175
Commitments to extend credit on standby letters of credit [Member] | Commitments to Extend Credit [Member]	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Contract amount	$3,147	$1,363

Commitments_and_Contingencies_4

Commitments and Contingencies (Schedule of Future Minimum Operating Lease Payments) (Details) (USD $)	Jun. 30, 2014
In Thousands, unless otherwise specified
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]	'
Due in the current year	$1,253
Due in year two	2,418
Due in year three	2,153
Due in year four	2,017
Due in year five	1,751
Due thereafter	17,543
Total minimum lease payments	$27,135

Sale_of_Business_Line_Details

Sale of Business Line (Details) (USD $)	6 Months Ended
	Jun. 30, 2014	Mar. 03, 2014
Sale of Business Line [Abstract]	'	'
Gain on sale of business line	$6,300,000	'
Gain on Sale of Business Line, After-Tax	4,000,000	'
Gain on Sale of Business Line, Earnings Per Share	'	$0.24
Divestiture Related Costs	355,000	'
Divestiture Related Costs, After Tax	$227,000	'
Earnings Per Share, Divestiture Costs	$0.01	'