Columbia Banking System (COLB) 10-Q 1 Aug 19 2019 Q2 Quarterly report Financial data

Document

Document - shares	6 Months Ended
	Jun. 30, 2019	Jul. 29, 2019
Entity Information [Line Items]
Entity Emerging Growth Company	false
Entity Address, City or Town	Tacoma
Entity Address, State or Province	WA
Entity Address, Postal Zip Code	98402-2156
City Area Code	253
Security Exchange Name	NASDAQ
Entity Small Business	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Entity Central Index Key	0000887343
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		72,939,361
Entity Address, Address Line One	1301 A Street
Document Type	10-Q
Trading Symbol	COLB
Entity Current Reporting Status	Yes
Entity Registrant Name	COLUMBIA BANKING SYSTEM, INC.
Entity Interactive Data Current	Yes
Local Phone Number	305-1900
Amendment Flag	false
Document Period End Date	Jun. 30, 2019
Entity File Number	0-20288
Entity Tax Identification Number	91-1422237
Entity Incorporation, State or Country Code	WA
Title of 12(b) Security	Common Stock, No Par Value
Document Quarterly Report	true
Document Transition Report	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) shares in Thousands, $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
ASSETS
Cash and Due from Banks	$ 224,327	$ 260,180
Interest-earning deposits with banks	34,332	17,407
Total cash and cash equivalents	258,659	277,587
Debt securities available for sale at fair value	2,864,418	3,167,448
FHLB stock at cost	29,800	25,960
Loans held for sale	12,189	3,849
Loans, net of unearned income	8,646,990	8,391,511
Less: ALLL	80,517	83,369
Loans, net	8,566,473	8,308,142
Interest receivable	46,878	45,323
Premises and equipment, net	167,295	168,788
OREO	1,118	6,019
Goodwill	765,842	765,842
Other intangible assets, net	40,540	45,937
Other assets	337,596	280,250
Total assets	13,090,808	13,095,145
LIABILITIES AND SHAREHOLDERS' EQUITY
Noninterest-bearing	5,082,219	5,227,216
Interest-bearing	5,129,380	5,230,910
Total deposits	10,211,599	10,458,126
FHLB advances	495,496	399,523
Securities sold under agreements to repurchase	50,226	61,094
Subordinated debentures	35,370	35,462
Other liabilities	164,479	107,291
Total liabilities	10,957,170	11,061,496
Commitments and contingent liabilities (Note 11)
Shareholders' equity:
Preferred Stock, Authorized shares	2,000	2,000
Common Stock Authorized shares	115,000	115,000
Common Stock Shares Issued	73,548	73,249
Common Stock Issued value	$ 1,644,922	$ 1,642,246
Common Stock, Shares, Outstanding	72,924	73,249
Retained earnings	$ 463,429	$ 426,708
Accumulated other comprehensive income (loss)	$ 47,150	$ (35,305)
Treasury Stock, Shares	624	0
Treasury Stock, Value	$ (21,863)	$ 0
Total shareholders’ equity	2,133,638	2,033,649
Total liabilities and shareholders’ equity	$ 13,090,808	$ 13,095,145

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2019	Dec. 31, 2018
Common Stock, No Par Value	$ 0	$ 0
Preferred Stock, No Par Value	$ 0	$ 0

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019		Jun. 30, 2018		Jun. 30, 2019	Jun. 30, 2018
Interest Income
Loans	$ 116,585		$ 105,412		$ 225,001	$ 208,439
Taxable securities	15,918		11,923		33,333	24,631
Tax-exempt securities	2,712		3,063		5,681	6,127
Deposits in banks	207		151		295	496
Total interest income	135,422		120,549		264,310	239,693
Interest Expense
Deposits	4,976		2,572		9,474	5,081
FHLB advances	4,708		815		7,393	1,385
Subordinated debentures	468		468		936	936
Other borrowings	154		20		369	136
Total interest expense	10,306		3,875		18,172	7,538
Net Interest Income	125,116		116,674		246,138	232,155
Provision for loan and lease losses	218		3,975		1,580	9,827
Net interest income after provision for loan and lease losses	124,898		112,699		244,558	222,328
Noninterest Income
Deposit account and treasury management fees	9,035		8,683		18,015	17,423
Card revenue	3,763		6,616		7,425	12,429
Financial services and trust revenue	3,425		3,219		6,382	5,949
Loan revenue	3,596		3,054		5,985	6,240
Bank owned life insurance	1,597		1,712		3,116	3,138
Investment securities gains (losses), net	285		(33)		2,132	(11)
Other	3,947		441		4,289	1,667
Total noninterest income	25,648		23,692		47,344	46,835
Noninterest Expense
Compensation and employee benefits	52,015		48,949		104,100	99,519
Occupancy	8,712		9,276		17,521	19,397
Data processing	4,601		5,221		9,270	10,491
Legal and professional fees	6,554		4,171		11,127	7,408
Amortization of intangibles	2,649		3,088		5,397	6,276
B&O taxes (1)	1,411	[1]	1,459	[1]	3,287	2,776
Advertising and promotion	870		1,622		1,844	3,051
Regulatory premiums	956		937		1,940	1,874
Net cost (benefit) of operation of OREO	(705)		758		(592)	759
Other (1)	9,665	[1]	9,162	[1]	17,534	19,079
Total noninterest expense	86,728		84,643		171,428	170,630
Income before income taxes	63,818		51,748		120,474	98,533
Income tax provision	12,094		9,999		22,879	16,814
Net Income	$ 51,724		$ 41,749		$ 97,595	$ 81,719
Earnings per common share
Basic	$ 0.71		$ 0.57		$ 1.33	$ 1.12
Diluted	$ 0.71		$ 0.57		$ 1.33	$ 1.12
Weighted average number of common shares outstanding	72,451		72,385		72,486	72,343
Weighted average number of diluted common shares outstanding	72,451		72,390		72,487	72,347
[1]	Beginning the first quarter of 2019, B&O taxes are reported separately from other taxes, licenses and fees, which are now reported under “other noninterest expense.” Prior periods have been reclassified to conform to current period presentation.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Net income		$ 51,724	$ 41,749	$ 97,595	$ 81,719
Unrealized gain (loss) from securities
Net unrealized holding gain (loss) from available for sale debt securities arising during the period, net of tax		37,029	(7,845)	71,926	(33,893)
Reclassification adjustment of net (gain) loss from sale of available for sale debt securities included in income, net of tax		(219)	(4)	(1,636)	(82)
Net unrealized gain (loss) from securities, net of reclassification adjustment		36,810	(7,849)	70,290	(33,975)
Pension plan liability adjustment:
Amortization of unrecognized net actuarial loss included in net periodic pension cost, net of tax		61	61	122	122
Pension plan liability adjustment, net		61	61	122	122
Unrealized gain (loss) from cash flow hedging instruments
Net unrealized gain (loss) in cash flow hedging instruments arising during the period, net of tax		7,233	0	12,043	0
Net unrealized gain (loss) from cash flow hedging instruments, net of reclassification adjustment		7,233	0	12,043	0
Other Comprehensive Income (Loss)	[1]	44,104	(7,788)	82,455	(33,853)
Total comprehensive income		$ 95,828	$ 33,961	$ 180,050	$ 47,866
[1]	All amounts are net of tax. Amounts in parenthesis indicate debits.

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Net unrealized holding gain (loss) from available for sale securities arising during the period, tax	$ (11,217)	$ 2,376	$ (21,788)	$ 10,267
Reclassification adjustment of net gain from sale of available for sale securities included in income, tax	66	1	496	25
Less: amortization of unrecognized net actuarial loss included in net periodic pension cost, tax	(19)	(19)	(37)	(38)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax	$ (2,191)	$ 0	$ (3,648)	$ 0

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Treasury Stock [Member]
Shares, Outstanding		73,020,000
Cumulative Effect of New Accounting Principle in Period of Adoption | Accounting Standards Update 2016-01 [Member]	$ 0		$ (157)	$ 157
Balance, value at Dec. 31, 2017	1,949,922	$ 1,634,705	337,442	(22,225)
Net income	81,719		81,719
Other comprehensive income	(33,853)			(33,853)
Issuance of common stock - stock option and other plans, shares		19,000
Issuance of common stock - stock option and other plans, value	$ 736	$ 736
Stock Adjustment Deferred Compensation - Shares	0
Stock Adjustment Value Deferred Compensation	$ 6
Issuance of common stock - restricted stock awards, net of cancelled awards, shares		268,000
Issuance of common stock - restricted stock awards, net of cancelled awards, value	4,083	$ 4,083
Stock Repurchased During Period, Shares		(62,000)
Stock Repurchased and Retired During Period, Value	(2,627)	$ (2,627)
Cash dividends paid on common stock	(35,105)		(35,105)
Balance, value at Jun. 30, 2018	1,964,881	$ 1,636,903	383,899	(55,921)	$ 0
Shares, Outstanding		73,240,000
Cumulative Effect of New Accounting Principle in Period of Adoption | Accounting Standards Update 2016-01 [Member]	46		46	0
Balance, value at Mar. 31, 2018	1,947,923	$ 1,634,916	361,140	(48,133)
Net income	41,749		41,749
Other comprehensive income	(7,788)			(7,788)
Issuance of common stock - stock option and other plans, shares		2,000
Issuance of common stock - stock option and other plans, value	$ 17	$ 17
Stock Adjustment Deferred Compensation - Shares	0
Stock Adjustment Value Deferred Compensation	$ 3
Issuance of common stock - restricted stock awards, net of cancelled awards, shares		5,000
Issuance of common stock - restricted stock awards, net of cancelled awards, value	2,019	$ 2,019
Stock Repurchased During Period, Shares		(2,000)
Stock Repurchased and Retired During Period, Value	(52)	$ (52)
Cash dividends paid on common stock	(19,036)		(19,036)
Balance, value at Jun. 30, 2018	1,964,881	$ 1,636,903	383,899	(55,921)	0
Shares, Outstanding		73,245,000
Shares, Outstanding		73,249,000
Cumulative Effect of New Accounting Principle in Period of Adoption | Accounting Standards Update 2016-02 [Member]			782
Balance, value at Dec. 31, 2018	2,033,649	$ 1,642,246	426,708	(35,305)	0
Net income	97,595		97,595
Other comprehensive income	82,455			82,455
Issuance of common stock - stock option and other plans, shares		27,000
Issuance of common stock - stock option and other plans, value	893	$ 893
Stock Adjustment Deferred Compensation - Shares		0
Stock Adjustment Value Deferred Compensation	1	$ 1
Issuance of common stock - restricted stock awards, net of cancelled awards, shares		345,000
Issuance of common stock - restricted stock awards, net of cancelled awards, value	4,528	$ 4,528
Stock Repurchased During Period, Shares		(73,000)
Stock Repurchased and Retired During Period, Value	(2,746)	$ (2,746)
Cash dividends paid on common stock	$ (61,656)		(61,656)
Treasury Stock, Shares, Acquired	(624,158)	(624,000)
Treasury Stock, Value, Acquired, Cost Method	$ (21,863)				(21,863)
Balance, value at Jun. 30, 2019	2,133,638	$ 1,644,922	463,429	47,150	(21,863)
Shares, Outstanding		73,565,000
Balance, value at Mar. 31, 2019	2,088,620	$ 1,642,977	442,597	3,046	0
Net income	51,724		51,724
Other comprehensive income	44,104			44,104
Issuance of common stock - stock option and other plans, shares		2,000
Issuance of common stock - stock option and other plans, value	15	$ 15
Stock Adjustment Deferred Compensation - Shares		0
Stock Adjustment Value Deferred Compensation	1	$ 1
Issuance of common stock - restricted stock awards, net of cancelled awards, shares		(10,000)
Issuance of common stock - restricted stock awards, net of cancelled awards, value	2,243	$ 2,243
Stock Repurchased During Period, Shares		(9,000)
Stock Repurchased and Retired During Period, Value	(314)	$ (314)
Cash dividends paid on common stock	$ (30,892)		(30,892)
Treasury Stock, Shares, Acquired	(624,158)	(624,000)
Treasury Stock, Value, Acquired, Cost Method	$ (21,863)				(21,863)
Balance, value at Jun. 30, 2019	$ 2,133,638	$ 1,644,922	$ 463,429	$ 47,150	$ (21,863)
Shares, Outstanding		72,924,000

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Common Stock, Dividends, Per Share, Cash Paid	$ 0.84	$ 0.48

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash Flows From Operating Activities
Net income	$ 97,595	$ 81,719
Adjustments to reconcile net income to net cash provided by operating activities
Provision for loan and lease losses	1,580	9,827
Stock-based compensation expense	4,528	4,083
Depreciation, amortization and accretion	17,298	16,788
Investment securities (gain) loss, net	2,132	(11)
Net realized (gain) loss on sale of premises and equipment and loans held for investment	666	(141)
Net realized (gain) loss on sale and valuation adjustments of OREO	507	(803)
Gain on bank owned life insurance death benefit	2,975	0
Originations of loans held for sale	68,722	67,311
Proceeds from sales of loans held for sale	60,382	66,304
Net change in:
Interest receivable	(1,555)	(2,224)
Interest payable	1,608	(36)
Other assets	(16,484)	6,367
Other liabilities	8,560	(2,017)
Net cash provided by operating activities	98,510	114,455
Cash Flows From Investing Activities
Loans originated, net of principal collected	(207,641)	(100,485)
Purchases of debt securities available for sale	(54,405)	(215,612)
Payments to Acquire Loans Held-for-investment	(49,039)	0
Purchases of premises and equipment	(3,540)	(5,011)
Payments to Acquire Federal Home Loan Bank Stock	(117,240)	(89,720)
Proceeds from sales of debt securities available for sale	259,554	32,330
Proceeds from principal repayments and maturities of debt securities available for sale	182,125	219,683
Proceeds from Sales of Assets, Investing Activities	24	6,236
Proceeds from redemption of Federal Home Loan Bank Stock	113,400	86,200
Proceeds from sales of other real estate and other personal property owned	5,823	5,821
Proceeds from Life Insurance Policy	0	5,074
Net cash provided by (used in) investing activities	129,061	(55,484)
Cash Flows From Financing Activities
Net decrease in deposits	(246,404)	(147,891)
Net decrease in sweep repurchase agreements (1)	(10,868)	(7,830)	[1]
Proceeds from Federal Home Loan Bank advances	2,931,000	2,243,000
Proceeds from FRB borrowings	36,000	10
Proceeds from Other Debt	100	0
Proceeds from exercise of stock options	893	736
Repayment of Federal Home Loan Bank advances	(2,835,000)	(2,155,000)
Repayment of FRB borrowings	36,000	10
Repayments of Other Debt	(100)	0
Repayments of junior subordinated debt	0	8,248
Repayment of term repurchase agreement	0	(25,000)	[1]
Payment of common stock dividends	(61,511)	(35,105)
Purchase and retirement of common stock	(21,863)	0
Payment, Tax Withholding, Share-based Payment Arrangement	2,746	2,627
Net cash used in financing activities	(246,499)	(137,965)
Decrease in cash and cash equivalents	(18,928)	(78,994)
Cash and cash equivalents at beginning of period	277,587	342,533
Cash and cash equivalents at end of period	258,659	263,539
Supplemental Information:
Cash paid for interest	16,564	7,573
Cash paid for income tax	20,940	3,621
Non-cash investing and financing activities
Loans transferred to other real estate owned	386	406
Premises and equipment expenditures incurred but not yet paid	56	40
Change in dividends payable on unvested shares	$ 145	$ 0
[1]	Revised from amounts previously reported to correct an immaterial misclassification of a $25.0 million repayment of the term repurchase agreement within Net decrease in sweep repurchase agreements for the six months ended June 30, 2018. There were no changes to net cash flows from operating, investing or financing activities as a result of this change.

Basis of Presentation and Signi

Basis of Presentation and Significant Accounting Policies	6 Months Ended
	Jun. 30, 2019
Basis of Presentation And Significant Accounting Policies
Basis of Presentation and Significant Accounting Policies	Basis of Presentation, Significant Accounting Policies and Reclassifications Basis of Presentation The interim unaudited Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information and with instructions to Form 10-Q and Article 10 of Regulation S-X. The Consolidated Financial Statements include the accounts of Columbia Banking System, Inc. (“we”, “our”, “Columbia” or the “Company”) and its subsidiaries, including its wholly owned banking subsidiary Columbia State Bank (“Columbia Bank” or the “Bank”) and Columbia Trust Company (“Columbia Trust”). All intercompany transactions and accounts have been eliminated in consolidation. In the opinion of management, all adjustments (consisting only of normal recurring adjustments) considered necessary for a fair statement of the results for the interim periods presented have been included. The results of operations for the six months ended June 30, 2019 are not necessarily indicative of results to be anticipated for the year ending December 31, 2019 . The accompanying interim unaudited Consolidated Financial Statements should be read in conjunction with the financial statements and related notes contained in the Company’s 2018 Annual Report on Form 10-K. Significant Accounting Policies The significant accounting policies used in preparation of our Consolidated Financial Statements are disclosed in our 2018 Annual Report on Form 10-K. There have not been any changes in our significant accounting policies compared to those contained in our 2018 Form 10-K disclosure for the year ended December 31, 2018 . Reclassifications Certain amounts reported in prior periods have been reclassified in the Consolidated Financial Statements to conform to the current presentation. The reclassifications have no effect on net income or stockholders’ equity as previously reported.

Accounting Pronouncements Recen

Accounting Pronouncements Recently Issued	6 Months Ended
	Jun. 30, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncements and Changes in Accounting Principles adopted	Accounting Standards Adopted in 2019 In February 2016, the FASB issued ASU 2016-02, Leases . The amendments included in this ASU create a new accounting model for both lessees and lessors. The new guidance requires lessees to recognize lease liabilities, initially measured as the present value of future lease payments, and corresponding right-of-use assets for all leases with lease terms greater than 12 months. The new lease model differs from the old lease accounting model, as the old model does not require such lease liabilities and corresponding right-of-use assets to be recorded for operating leases. The amendments in ASU 2016-02 must be adopted using the modified retrospective approach and will be effective for the first interim or annual period beginning after December 15, 2018. The FASB subsequently issued ASU 2018-11, which allows for an additional (optional) transition method. The Company adopted the new standard effective January 1, 2019 utilizing the transition method allowed under ASU 2018-11 and did not restate comparative periods. The Company elected the package of practical expedients permitted under the transition guidance, which allowed us to carryforward our historical lease classifications and our assessment on whether a contract is or contains a lease. We also elected to keep leases with an initial term of 12 months or less off the balance sheet. The adoption of the new standard resulted in an increase in other assets and an increase in other liabilities of $49.2 million and $48.2 million , respectively. The Company recognized a cumulative effect adjustment of $782 thousand
Accounting Pronouncements Recently Issued not yet adopted	Recently Issued Accounting Standards, Not Yet Adopted In April 2019, the FASB issued ASU 2019-04, Codification Improvements to Topic 326, Financial Instruments - Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments . The amendments in this ASU clarify certain aspects of accounting for credit losses, hedging activities, and financial instruments (addressed by ASUs 2016-01, 2016-13, and 2017-12). Many of the amendments reflect decisions reached at FASB meetings or meetings of the Board’s credit losses transition resource group. Topics covered in this ASU include: accrued interest, transfers between classifications or categories for loans and debt securities, recoveries, reinsurance recoverables, projections of interest rate environments for variable-rate financial instruments, costs to sell when foreclosure is probable, consideration of expected prepayments when determining the effective interest rate, vintage disclosures, extension and renewal options, etc. The amendments in ASU 2019-04 are effective for fiscal years beginning after December 15, 2019 and interim periods within those fiscal years. Early adoption is permitted, including adoption in any interim period. The Company is assessing the impact that this guidance will have on its Consolidated Financial Statements. In August 2018, the FASB issued ASU 2018-15, Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract . The amendments in this ASU align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The amendments also require the entity to expense the capitalized implementation costs of a hosting arrangement that is a service contract over the term of the hosting arrangement, including reasonably certain renewal periods. The amendments in ASU 2018-15 are effective for fiscal years beginning after December 15, 2019 and interim periods within those fiscal years. Early adoption is permitted, including adoption in any interim period. The Company is assessing the impact that this guidance will have on its Consolidated Financial Statements. In June 2016, the FASB issued ASU 2016-13, Measurement of Credit Losses on Financial Instruments . The amendments included in this ASU require an entity to reflect its current estimate of all expected credit losses for assets held at an amortized cost basis. For available for sale debt securities, credit losses will be measured in a manner similar to current GAAP, however, this ASU will require that credit losses be presented as an allowance rather than as a write-down. The amendments in ASU 2016-13 are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, and are required to be adopted through a modified retrospective approach, with a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the ASU is effective. Although the Company is in the final stages of determining an initial estimate, it currently cannot reasonably estimate the impact that the adoption of ASU 2016-13 will have on its Consolidated Financial Statements. That assessment is based upon the fact that, unlike the incurred loss models in existing GAAP, the CECL model in ASU 2016-13 does not specify a threshold for the recognition of an impairment allowance. Rather, the Company will recognize an impairment allowance equal to its estimate of lifetime expected credit losses, adjusted for prepayments, for in-scope financial instruments as of the end of the reporting period. Accordingly, the impairment allowance measured under the CECL model could increase significantly from the impairment allowance measured under the Company’s existing incurred loss model. The Company has engaged a third-party vendor to assist in the CECL calculation and has developed an internal governance framework to oversee the CECL implementation. Other significant CECL implementation matters being addressed by the Company include selecting loss estimation methodologies, identifying, sourcing and storing data, addressing data gaps, defining a reasonable and supportable forecast period, selecting historical loss information, assessing the impact to internal controls over financial reporting, and capital planning.

Securities

Securities	6 Months Ended
	Jun. 30, 2019
Debt Securities, Available-for-sale [Abstract]
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]	Securities The following table summarizes the amortized cost, gross unrealized gains and losses and the resulting fair value of debt securities available for sale: Amortized Gross Gross Fair Value June 30, 2019 (in thousands) U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 2,099,819 $ 50,980 $ (11,303 ) $ 2,139,496 State and municipal securities 503,279 7,459 (1,059 ) 509,679 U.S. government agency and government-sponsored enterprise securities 212,655 2,527 (188 ) 214,994 U.S. government securities 250 — (1 ) 249 Total $ 2,816,003 $ 60,966 $ (12,551 ) $ 2,864,418 December 31, 2018 U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 2,222,521 $ 9,236 $ (43,467 ) $ 2,188,290 State and municipal securities 579,755 2,328 (7,760 ) 574,323 U.S. government agency and government-sponsored enterprise securities 408,088 1,235 (4,736 ) 404,587 U.S. government securities 251 — (3 ) 248 Total $ 3,210,615 $ 12,799 $ (55,966 ) $ 3,167,448 The following table provides the proceeds and both gross realized gains and losses on sales of debt securities available for sale as well as other securities gains and losses for the periods indicated: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (in thousands) Proceeds from sales of debt securities available for sale $ 175,586 $ 12,569 $ 259,554 $ 32,330 Gross realized gains from sales of debt securities available for sale $ 1,510 $ 87 $ 3,357 $ 235 Gross realized losses from sales of debt securities available for sale (1,225 ) (83 ) (1,225 ) (129 ) Other securities losses, net (1) — (37 ) — (117 ) Investment securities gains, net $ 285 $ (33 ) $ 2,132 $ (11 ) __________ (1) Other securities losses, net includes net unrealized loss activity associated with equity securities for the periods ended June 30, 2018 . There were no sales of equity securities during the periods presented. The scheduled contractual maturities of debt securities available for sale at June 30, 2019 are presented as follows: June 30, 2019 Amortized Cost Fair Value (in thousands) Due within one year $ 95,802 $ 95,869 Due after one year through five years 438,632 441,541 Due after five years through ten years 1,315,811 1,361,873 Due after ten years 965,758 965,135 Total debt securities available for sale $ 2,816,003 $ 2,864,418 The following table summarizes the carrying value of securities pledged as collateral to secure public deposits, borrowings and other purposes as permitted or required by law: June 30, 2019 (in thousands) Washington and Oregon State to secure public deposits $ 280,968 FRB to secure borrowings 52,329 Other securities pledged 156,218 Total securities pledged as collateral $ 489,515 The following table shows the gross unrealized losses and fair value of the Company’s debt securities available for sale with unrealized losses that are not deemed to be other-than-temporarily impaired, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at June 30, 2019 and December 31, 2018 : Less than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized June 30, 2019 (in thousands) U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 1,165 $ (6 ) $ 785,380 $ (11,297 ) $ 786,545 $ (11,303 ) State and municipal securities 8,895 (33 ) 105,708 (1,026 ) 114,603 (1,059 ) U.S. government agency and government-sponsored enterprise securities 502 — 64,376 (188 ) 64,878 (188 ) U.S. government securities — — 249 (1 ) 249 (1 ) Total $ 10,562 $ (39 ) $ 955,713 $ (12,512 ) $ 966,275 $ (12,551 ) December 31, 2018 U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 154,622 $ (972 ) $ 1,301,387 $ (42,495 ) $ 1,456,009 $ (43,467 ) State and municipal securities 106,292 (581 ) 280,496 (7,179 ) 386,788 (7,760 ) U.S. government agency and government-sponsored enterprise securities 15,392 (45 ) 291,435 (4,691 ) 306,827 (4,736 ) U.S. government securities — — 247 (3 ) 247 (3 ) Total $ 276,306 $ (1,598 ) $ 1,873,565 $ (54,368 ) $ 2,149,871 $ (55,966 ) At June 30, 2019 , there were 230 U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations securities in an unrealized loss position, of which 228 were in a continuous loss position for 12 months or more. The decline in fair value is attributable to changes in interest rates relative to where these investments fall within the yield curve and their individual characteristics. Because the Company does not intend to sell these securities nor does the Company consider it more likely than not that it will be required to sell these securities before the recovery of amortized cost basis, which may be upon maturity, the Company does not consider these investments to be other-than-temporarily impaired at June 30, 2019 . At June 30, 2019 , there were 134 state and municipal government securities in an unrealized loss position, of which 126 were in a continuous loss position for 12 months or more. The unrealized losses on state and municipal securities were caused by interest rate changes or widening of market spreads subsequent to the purchase of the individual securities. Management monitors published credit ratings of these securities for adverse changes. As of June 30, 2019 , none of the rated obligations of state and local government entities held by the Company had a below investment grade credit rating. Because the credit quality of these securities are investment grade and the Company does not intend to sell these securities nor does the Company consider it more likely than not that it will be required to sell these securities before the recovery of amortized cost basis, which may be upon maturity, the Company does not consider these investments to be other-than-temporarily impaired at June 30, 2019 . At June 30, 2019 , there were 13 U.S. government agency and government-sponsored enterprise securities in an unrealized loss position, of which 12 were in a continuous loss position for 12 months or more. The decline in fair value is attributable to changes in interest rates relative to where these investments fall within the yield curve and their individual characteristics. Because the Company does not currently intend to sell these securities nor does the Company consider it more likely than not that it will be required to sell these securities before the recovery of amortized cost basis, which may be upon maturity, the Company does not consider these investments to be other-than-temporarily impaired at June 30, 2019 . At June 30, 2019 , there was one U.S. government security in an unrealized loss position, which was also in a continuous loss position for more than 12 months. The decline in fair value is attributable to changes in interest rates relative to where this investment falls within the yield curve and its individual characteristics. Because the Company does not currently intend to sell this security nor does the Company consider it more likely than not that it will be required to sell this security before the recovery of amortized cost basis, which may be upon maturity, the Company does not consider this investment to be other-than-temporarily impaired at June 30, 2019 .

Loans

Loans	6 Months Ended
	Jun. 30, 2019
Loans and Leases Receivable, Net Amount [Abstract]
Loans	Loans The Company’s loan portfolio includes originated and purchased loans. Originated loans and purchased loans for which there was no evidence of credit deterioration at their acquisition date and it was probable that we would be able to collect all contractually required payments are referred to collectively as loans, excluding PCI loans. Purchased loans for which there was, at acquisition date, evidence of credit deterioration since their origination and it was probable that we would be unable to collect all contractually required payments are referred to as PCI loans. The following is an analysis of the loan portfolio by segment (net of unearned income): June 30, 2019 December 31, 2018 Loans, excluding PCI loans PCI Loans Total Loans, excluding PCI loans PCI Loans Total (in thousands) Commercial business $ 3,644,051 $ 9,330 $ 3,653,381 $ 3,438,422 $ 9,240 $ 3,447,662 Real estate: One-to-four family residential 279,091 7,557 286,648 238,367 8,017 246,384 Commercial and multifamily residential 3,913,546 58,518 3,972,064 3,846,027 62,910 3,908,937 Total real estate 4,192,637 66,075 4,258,712 4,084,394 70,927 4,155,321 Real estate construction: One-to-four family residential 201,783 143 201,926 217,790 153 217,943 Commercial and multifamily residential 255,452 498 255,950 284,394 534 284,928 Total real estate construction 457,235 641 457,876 502,184 687 502,871 Consumer 305,752 8,684 314,436 318,945 8,906 327,851 Less: Net unearned income (37,415 ) — (37,415 ) (42,194 ) — (42,194 ) Total loans, net of unearned income 8,562,260 84,730 8,646,990 8,301,751 89,760 8,391,511 Less: ALLL (77,248 ) (3,269 ) (80,517 ) (79,758 ) (3,611 ) (83,369 ) Total loans, net $ 8,485,012 $ 81,461 $ 8,566,473 $ 8,221,993 $ 86,149 $ 8,308,142 Loans held for sale $ 12,189 $ — $ 12,189 $ 3,849 $ — $ 3,849 At June 30, 2019 and December 31, 2018 , the Company had no material foreign activities. Substantially all of the Company’s loans and unfunded commitments are geographically concentrated in its service areas within the states of Washington, Oregon and Idaho. At June 30, 2019 and December 31, 2018 , $3.25 billion and $3.22 billion of commercial and residential real estate loans were pledged as collateral on FHLB borrowings and additional borrowing capacity. The Company has also pledged $85.0 million and $82.0 million of commercial loans to the FRB for additional borrowing capacity at June 30, 2019 and December 31, 2018 , respectively. The following is an analysis of nonaccrual loans as of June 30, 2019 and December 31, 2018 : June 30, 2019 December 31, 2018 Recorded Unpaid Principal Recorded Unpaid Principal (in thousands) Commercial business: Secured $ 23,982 $ 32,851 $ 35,504 $ 45,072 Unsecured 15 15 9 9 Real estate: One-to-four family residential 860 888 1,158 1,178 Commercial & multifamily residential: Commercial land 2,565 2,573 2,261 2,270 Income property 1,814 1,851 2,721 3,062 Owner occupied 7,464 7,601 9,922 10,300 Real estate construction: One-to-four family residential: Land and acquisition — — 318 318 Consumer 2,338 2,661 2,949 3,149 Total $ 39,038 $ 48,440 $ 54,842 $ 65,358 Loans, excluding PCI loans The following is an aging of the recorded investment of the loan portfolio as of June 30, 2019 and December 31, 2018 : Current 30 - 59 60 - 89 Greater Total Nonaccrual Total Loans June 30, 2019 (in thousands) Commercial business: Secured $ 3,471,016 $ 4,103 $ 3,294 $ — $ 7,397 $ 23,982 $ 3,502,395 Unsecured 128,865 438 — — 438 15 129,318 Real estate: One-to-four family residential 274,537 2,969 352 — 3,321 860 278,718 Commercial & multifamily residential: Commercial land 289,574 — — — — 2,565 292,139 Income property 1,946,429 1,022 — — 1,022 1,814 1,949,265 Owner occupied 1,640,358 2,981 511 — 3,492 7,464 1,651,314 Real estate construction: One-to-four family residential: Land and acquisition 1,683 — — — — — 1,683 Residential construction 199,154 — — — — — 199,154 Commercial & multifamily residential: Income property 163,074 — — — — — 163,074 Owner occupied 87,561 — 2,204 — 2,204 — 89,765 Consumer 302,323 604 170 — 774 2,338 305,435 Total $ 8,504,574 $ 12,117 $ 6,531 $ — $ 18,648 $ 39,038 $ 8,562,260 Current 30 - 59 60 - 89 Greater Total Nonaccrual Total Loans December 31, 2018 (in thousands) Commercial business: Secured $ 3,267,709 $ 5,864 $ 3,624 $ — $ 9,488 $ 35,504 $ 3,312,701 Unsecured 111,868 240 — — 240 9 112,117 Real estate: One-to-four family residential 233,941 694 233 — 927 1,158 236,026 Commercial & multifamily residential: Commercial land 283,416 — — — — 2,261 285,677 Income property 1,910,505 5,009 2,241 — 7,250 2,721 1,920,476 Owner occupied 1,606,085 1,744 — — 1,744 9,922 1,617,751 Real estate construction: One-to-four family residential: Land and acquisition 4,099 — — — — 318 4,417 Residential construction 212,303 93 — — 93 — 212,396 Commercial & multifamily residential: Income property 194,912 — — — — — 194,912 Owner occupied 79,805 7,258 — — 7,258 — 87,063 Consumer 314,008 1,057 201 — 1,258 2,949 318,215 Total $ 8,218,651 $ 21,959 $ 6,299 $ — $ 28,258 $ 54,842 $ 8,301,751 The following is an analysis of impaired loans as of June 30, 2019 and December 31, 2018 : Recorded Investment Recorded Investment Impaired Loans With Impaired Loans Without Recorded Unpaid Related Recorded Unpaid June 30, 2019 (in thousands) Commercial business: Secured $ 3,485,136 $ 17,259 $ 4,432 $ 5,661 $ 740 $ 12,827 $ 16,997 Unsecured 129,302 16 16 16 — — — Real estate: One-to-four family residential 277,873 845 315 596 6 530 755 Commercial & multifamily residential: Commercial land 289,277 2,862 2,233 2,241 666 629 667 Income property 1,947,936 1,329 — — — 1,329 1,362 Owner occupied 1,641,023 10,291 3,129 4,614 43 7,162 7,272 Real estate construction: One-to-four family residential: Land and acquisition 1,683 — — — — — — Residential construction 199,154 — — — — — — Commercial & multifamily residential: Income property 163,074 — — — — — — Owner occupied 89,765 — — — — — — Consumer 301,978 3,457 1,141 1,275 20 2,316 2,460 Total $ 8,526,201 $ 36,059 $ 11,266 $ 14,403 $ 1,475 $ 24,793 $ 29,513 Recorded Investment Recorded Investment Impaired Loans With Impaired Loans Without Recorded Unpaid Related Recorded Unpaid December 31, 2018 (in thousands) Commercial business: Secured $ 3,286,416 $ 26,285 $ 6,350 $ 8,460 $ 2,023 $ 19,935 $ 24,404 Unsecured 112,097 20 20 20 — — — Real estate: One-to-four family residential 235,138 888 325 798 8 563 575 Commercial & multifamily residential: Commercial land 283,451 2,226 — — — 2,226 2,272 Income property 1,917,522 2,954 99 165 1 2,855 3,011 Owner occupied 1,605,042 12,709 3,231 4,666 69 9,478 9,750 Real estate construction: One-to-four family residential: Land and acquisition 4,417 — — — — — — Residential construction 212,396 — — — — — — Commercial & multifamily residential: Income property 194,912 — — — — — — Owner occupied 87,063 — — — — — — Consumer 314,193 4,022 3,326 3,584 31 696 704 Total $ 8,252,647 $ 49,104 $ 13,351 $ 17,693 $ 2,132 $ 35,753 $ 40,716 The following table provides additional information on impaired loans for the three and six month periods indicated: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Average Recorded Interest Recognized Average Recorded Interest Recognized Average Recorded Interest Recognized Average Recorded Interest Recognized (in thousands) Commercial business: Secured $ 23,733 $ 18 $ 45,716 $ 85 $ 24,584 $ 29 $ 43,815 $ 97 Unsecured 18 — 444 1 18 1 304 1 Real estate: One-to-four family residential 855 12 780 12 866 18 818 18 Commercial & multifamily residential: Commercial land 2,864 8 2,557 — 2,651 15 2,467 — Income property 1,325 — 2,846 32 1,868 — 3,572 62 Owner occupied 13,421 147 8,768 124 13,184 193 8,741 209 Real estate construction: One-to-four family residential: Residential construction — — 605 — — — 807 — Commercial & multifamily residential: Owner occupied — — 4,050 51 — — 4,050 102 Consumer 3,456 21 6,391 34 3,644 37 6,599 77 Total $ 45,672 $ 206 $ 72,157 $ 339 $ 46,815 $ 293 $ 71,173 $ 566 The following is an analysis of loans classified as TDR during the three and six months ended June 30, 2019 and 2018 : Three Months Ended June 30, 2019 Three Months Ended June 30, 2018 Number of TDR Modifications Pre-Modification Post-Modification Number of TDR Modifications Pre-Modification Post-Modification (dollars in thousands) Commercial business: Secured 3 $ 918 $ 918 7 $ 2,644 $ 2,644 Consumer 4 118 118 8 1,274 1,274 Total 7 $ 1,036 $ 1,036 15 $ 3,918 $ 3,918 Six Months Ended June 30, 2019 Six Months Ended June 30, 2018 Number of TDR Modifications Pre-Modification Post-Modification Number of TDR Modifications Pre-Modification Post-Modification (dollars in thousands) Commercial business: Secured 5 $ 1,534 $ 1,534 8 $ 3,094 $ 3,094 Real estate: Commercial and multifamily residential: Income property 1 217 217 1 891 891 Consumer 4 118 118 15 2,417 2,417 Total 10 $ 1,869 $ 1,869 24 $ 6,402 $ 6,402 The Company’s loans classified as TDR are loans that have been modified or the borrower has been granted special concessions due to financial difficulties that, if not for the challenges of the borrower, the Company would not otherwise consider. The TDR modifications or concessions are made to increase the likelihood that these borrowers with financial difficulties will be able to satisfy their debt obligations as amended. The concessions granted in the restructurings, summarized in the table above, largely consisted of maturity extensions, interest rate modifications or a combination of both. In limited circumstances, a reduction in the principal balance of the loan could also be made as a concession. Credit losses for loans classified as TDR are measured on the same basis as impaired loans. For impaired loans, an allowance is established when the collateral value less selling costs (or discounted cash flows or observable market price) of the impaired loan is lower than the recorded investment of that loan. The Company had commitments to lend $464 thousand of additional funds on loans classified as TDR as of June 30, 2019 . The Company had $2.1 million of such commitments at December 31, 2018 . The Company did not have any loans modified as TDR that defaulted within 12 months of being modified as TDR during the three months ended June 30, 2019 . The Company did have one $26 thousand consumer loan that defaulted within 12 months of being modified as a TDR during the six months ended June 30, 2019 . The defaulted TDR loan is collateralized and was included with the loans individually measured for specific impairment. The Company did not experience any similar defaults during the three and six months ended June 30, 2018 . PCI Loans PCI loans are accounted for under ASC 310-30 and initially measured at fair value based on expected future cash flows over the life of the loans. Loans that have common risk characteristics are aggregated into pools. The Company remeasures contractual and expected cash flows, at the pool-level, on a quarterly basis. Contractual cash flows are calculated based upon the loan pool terms after applying a prepayment factor. Calculation of the applied prepayment factor for contractual cash flows is the same as described below for expected cash flows. Inputs to the determination of expected cash flows include cumulative default and prepayment data as well as loss severity and recovery lag information. Cumulative default and prepayment data are calculated via a transition matrix, which utilizes probability values of a loan pool transitioning into a particular delinquency state (e.g. 0-30 days past due, 31 to 60 days, etc.) given its delinquency state at the remeasurement date. Loss severity factors are based upon either actual charge-off data within the loan pools or industry averages, and recovery lags are based upon the collateral within the loan pools. The excess of cash flows, expected to be collected over the initial fair value of PCI loans, is referred to as the accretable yield and is accreted into interest income over the estimated life of the acquired loans using the effective yield method. Other adjustments to the accretable yield include changes in the estimated remaining life of the acquired loans, changes in expected cash flows and changes of indices for acquired loans with variable interest rates. The following is an analysis of our PCI loans, net of related ALLL and remaining valuation discounts as of June 30, 2019 and December 31, 2018 : June 30, 2019 December 31, 2018 (in thousands) Commercial business $ 9,578 $ 9,672 Real estate: One-to-four family residential 9,019 9,848 Commercial and multifamily residential 61,372 66,340 Total real estate 70,391 76,188 Real estate construction: One-to-four family residential 143 153 Commercial and multifamily residential 474 507 Total real estate construction 617 660 Consumer 9,402 9,765 Subtotal of PCI loans 89,988 96,285 Less: Valuation discount resulting from acquisition accounting 5,258 6,525 ALLL 3,269 3,611 PCI loans, net of valuation discounts and allowance for loan losses $ 81,461 $ 86,149 The following table shows the changes in accretable yield for PCI loans for the three and six months ended June 30, 2019 and 2018 : Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (in thousands) Balance at beginning of period $ 21,849 $ 29,355 $ 21,949 $ 31,176 Accretion (1,999 ) (1,937 ) (3,576 ) (4,202 ) Disposals 3 (7 ) 106 (166 ) Reclassifications to (from) nonaccretable difference 1,136 (2,061 ) 2,510 (1,458 ) Balance at end of period $ 20,989 $ 25,350 $ 20,989 $ 25,350

Allowance for Loan and Lease Lo

Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit	6 Months Ended
	Jun. 30, 2019
Allowance For Loan And Lease Losses And Unfunded Loan Commitments And Letters Of Credit
Allowance For Loan And Lease Losses And Unfunded Loan Commitments And Letters Of Credit Text Block	Allowance for Loan and Lease Losses and Allowance for Unfunded Commitments and Letters of Credit We record an ALLL to recognize management’s estimate of credit losses incurred in the loan portfolio at each balance sheet date. We have used the same methodology for the ALLL calculation during the six months ended June 30, 2019 and 2018 . The following tables show a detailed analysis of the ALLL for the three and six months ended June 30, 2019 and 2018 : Beginning Charge-offs Recoveries Provision (Recapture) Ending Specific General Three Months Ended June 30, 2019 (in thousands) Commercial business: Secured $ 43,617 $ (4,103 ) $ 515 $ (2,167 ) $ 37,862 $ 740 $ 37,122 Unsecured 2,495 (15 ) 32 498 3,010 — 3,010 Real estate: One-to-four family residential 616 — 20 9 645 6 639 Commercial & multifamily residential: Commercial land 4,588 — 7 814 5,409 666 4,743 Income property 5,018 — 25 282 5,325 — 5,325 Owner occupied 4,966 — 1 263 5,230 43 5,187 Real estate construction: One-to-four family residential: Land and acquisition 407 — 72 (326 ) 153 — 153 Residential construction 5,466 — 589 48 6,103 — 6,103 Commercial & multifamily residential: Income property 4,517 — 1 (320 ) 4,198 — 4,198 Owner occupied 2,220 — — 192 2,412 — 2,412 Consumer 5,545 (354 ) 178 (175 ) 5,194 20 5,174 PCI 3,245 (815 ) 872 (33 ) 3,269 — 3,269 Unallocated 574 — — 1,133 1,707 — 1,707 Total $ 83,274 $ (5,287 ) $ 2,312 $ 218 $ 80,517 $ 1,475 $ 79,042 Beginning Charge-offs Recoveries Provision (Recapture) Ending Specific General Six Months Ended June 30, 2019 (in thousands) Commercial business: Secured $ 43,188 $ (5,352 ) $ 838 $ (812 ) $ 37,862 $ 740 $ 37,122 Unsecured 2,626 (15 ) 189 210 3,010 — 3,010 Real estate: One-to-four family residential 593 (2 ) 37 17 645 6 639 Commercial & multifamily residential: Commercial land 3,947 — 14 1,448 5,409 666 4,743 Income property 4,044 — 48 1,233 5,325 — 5,325 Owner occupied 4,533 — 2 695 5,230 43 5,187 Real estate construction: One-to-four family residential: Land and acquisition 549 — 131 (527 ) 153 — 153 Residential construction 5,536 (170 ) 590 147 6,103 — 6,103 Commercial & multifamily residential: Income property 5,784 — 1 (1,587 ) 4,198 — 4,198 Owner occupied 2,604 — — (192 ) 2,412 — 2,412 Consumer 5,301 (832 ) 416 309 5,194 20 5,174 PCI 3,611 (1,904 ) 1,577 (15 ) 3,269 — 3,269 Unallocated 1,053 — — 654 1,707 — 1,707 Total $ 83,369 $ (8,275 ) $ 3,843 $ 1,580 $ 80,517 $ 1,475 $ 79,042 Beginning Charge-offs Recoveries Provision (Recapture) Ending Specific General Three Months Ended June 30, 2018 (in thousands) Commercial business: Secured $ 37,331 $ (5,751 ) $ 1,487 $ 7,283 $ 40,350 $ 67 $ 40,283 Unsecured 2,595 (24 ) 56 (184 ) 2,443 — 2,443 Real estate: One-to-four family residential 558 — 196 (293 ) 461 8 453 Commercial & multifamily residential: Commercial land 3,745 — 78 (545 ) 3,278 — 3,278 Income property 4,702 — 558 (1,158 ) 4,102 — 4,102 Owner occupied 4,749 — 4 (397 ) 4,356 86 4,270 Real estate construction: One-to-four family residential: Land and acquisition 912 — 12 (76 ) 848 — 848 Residential construction 4,636 — 2 (66 ) 4,572 — 4,572 Commercial & multifamily residential: Income property 7,474 — — (107 ) 7,367 — 7,367 Owner occupied 1,923 — — 376 2,299 — 2,299 Consumer 5,216 (232 ) 270 38 5,292 95 5,197 PCI 5,665 (1,235 ) 927 (575 ) 4,782 — 4,782 Unallocated 321 — — (321 ) — — — Total $ 79,827 $ (7,242 ) $ 3,590 $ 3,975 $ 80,150 $ 256 $ 79,894 Beginning Charge-offs Recoveries Provision (Recapture) Ending Specific General Six Months Ended June 30, 2018 (in thousands) Commercial business: Secured $ 29,341 $ (8,165 ) $ 2,040 $ 17,134 $ 40,350 $ 67 $ 40,283 Unsecured 2,000 (87 ) 305 225 2,443 — 2,443 Real estate: One-to-four family residential 701 — 368 (608 ) 461 8 453 Commercial & multifamily residential: Commercial land 4,265 — 84 (1,071 ) 3,278 — 3,278 Income property 5,672 (223 ) 699 (2,046 ) 4,102 — 4,102 Owner occupied 5,459 — 16 (1,119 ) 4,356 86 4,270 Real estate construction: One-to-four family residential: Land and acquisition 963 — 28 (143 ) 848 — 848 Residential construction 3,709 — 5 858 4,572 — 4,572 Commercial & multifamily residential: Income property 7,053 — — 314 7,367 — 7,367 Owner occupied 4,413 — — (2,114 ) 2,299 — 2,299 Consumer 5,163 (496 ) 530 95 5,292 95 5,197 PCI 6,907 (2,578 ) 2,151 (1,698 ) 4,782 — 4,782 Unallocated — — — — — — — Total $ 75,646 $ (11,549 ) $ 6,226 $ 9,827 $ 80,150 $ 256 $ 79,894 Changes in the allowance for unfunded commitments and letters of credit, a component of “Other liabilities” in the Consolidated Balance Sheets, are summarized as follows: Three Months Ended Six Months Ended June 30, June 30, 2019 2018 2019 2018 (in thousands) Balance at beginning of period $ 3,780 $ 4,330 $ 4,330 $ 3,130 Net changes in the allowance for unfunded commitments and letters of credit 200 (650 ) (350 ) 550 Balance at end of period $ 3,980 $ 3,680 $ 3,980 $ 3,680 Risk Elements The extension of credit in the form of loans or other credit products to individuals and businesses is one of our principal business activities. Our policies and applicable laws and regulations require risk analysis as well as ongoing portfolio and credit management. We manage our credit risk through lending limit constraints, credit review, approval policies and extensive, ongoing internal monitoring. We also manage credit risk through diversification of the loan portfolio by type of loan, type of industry and type of borrower and by limiting the aggregation of debt to a single borrower. Risk ratings are reviewed and updated whenever appropriate, with more periodic reviews as the risk and dollar value of loss on the loan increases. In the event full collection of principal and interest is not reasonably assured, the loan is appropriately downgraded and, if warranted, placed on nonaccrual status even though the loan may be current as to principal and interest payments. Additionally, we assess whether an impairment of a loan warrants specific reserves or a write-down of the loan. Pass rated loans are generally considered to have sufficient sources of repayment in order to repay the loan in full in accordance with all terms and conditions. Special Mention rated loans have potential weaknesses that, if left uncorrected, may result in deterioration of the repayment prospects for the asset or in the Company’s credit position at some future date. Loans with a risk rating of Substandard or worse are reviewed to assess the ability of our borrowers to service all interest and principal obligations and, as a result, the risk rating or accrual status may be adjusted accordingly. Loans risk rated as Substandard reflect loans where a loss is possible if loan weaknesses are not corrected. Doubtful rated loans have a high probability of loss; however, the amount of loss has not yet been determined. Loss rated loans are considered uncollectable and when identified, are charged off. The following is an analysis of the credit quality of our loan portfolio, excluding PCI loans, as of June 30, 2019 and December 31, 2018 : Pass Special Mention Substandard Doubtful Loss Total June 30, 2019 (in thousands) Loans, excluding PCI loans: Commercial business: Secured $ 3,371,298 $ 35,506 $ 95,591 $ — $ — $ 3,502,395 Unsecured 129,098 — 220 — — 129,318 Real estate: One-to-four family residential 277,407 — 1,311 — — 278,718 Commercial and multifamily residential: Commercial land 277,564 2,426 12,149 — — 292,139 Income property 1,904,020 547 44,698 — — 1,949,265 Owner occupied 1,590,785 10,100 50,429 — — 1,651,314 Real estate construction: One-to-four family residential: Land and acquisition 1,683 — — — — 1,683 Residential construction 199,154 — — — — 199,154 Commercial and multifamily residential: Income property 163,074 — — — — 163,074 Owner occupied 88,917 — 848 — — 89,765 Consumer 301,826 — 3,609 — — 305,435 Total $ 8,304,826 $ 48,579 $ 208,855 $ — $ — 8,562,260 Less: ALLL 77,248 Loans, excluding PCI loans, net $ 8,485,012 Pass Special Mention Substandard Doubtful Loss Total December 31, 2018 (in thousands) Loans, excluding PCI loans: Commercial business: Secured $ 3,160,910 $ 48,779 $ 103,007 $ 5 $ — $ 3,312,701 Unsecured 112,091 21 — 5 — 112,117 Real estate: One-to-four family residential 234,416 — 1,610 — — 236,026 Commercial and multifamily residential: Commercial land 276,348 5,082 4,247 — — 285,677 Income property 1,876,925 36,998 6,553 — — 1,920,476 Owner occupied 1,556,852 14,964 45,935 — — 1,617,751 Real estate construction: One-to-four family residential: Land and acquisition 4,099 — 318 — — 4,417 Residential construction 212,225 — 171 — — 212,396 Commercial and multifamily residential: Income property 194,912 — — — — 194,912 Owner occupied 87,063 — — — — 87,063 Consumer 313,817 — 4,398 — — 318,215 Total $ 8,029,658 $ 105,844 $ 166,239 $ 10 $ — 8,301,751 Less: ALLL 79,758 Loans, excluding PCI loans, net $ 8,221,993 The following is an analysis of the credit quality of our PCI loan portfolio as of June 30, 2019 and December 31, 2018 : Pass Special Mention Substandard Doubtful Loss Total June 30, 2019 (in thousands) PCI loans: Commercial business: Secured $ 6,910 $ 964 $ 767 $ — $ — $ 8,641 Unsecured 937 — — — — 937 Real estate: One-to-four family residential 8,340 — 679 — — 9,019 Commercial and multifamily residential: Commercial land 9,012 646 72 — — 9,730 Income property 18,294 — — — — 18,294 Owner occupied 26,985 — 6,363 — — 33,348 Real estate construction: One-to-four family residential: Land and acquisition 143 — — — — 143 Residential construction — — — — — — Commercial and multifamily residential: Income property 474 — — — — 474 Owner occupied — — — — — — Consumer 9,024 — 378 — — 9,402 Total $ 80,119 $ 1,610 $ 8,259 $ — $ — 89,988 Less: Valuation discount resulting from acquisition accounting 5,258 ALLL 3,269 PCI loans, net $ 81,461 Pass Special Mention Substandard Doubtful Loss Total December 31, 2018 (in thousands) PCI loans: Commercial business: Secured $ 8,041 $ — $ 840 $ — $ — $ 8,881 Unsecured 692 — 99 — — 791 Real estate: One-to-four family residential 9,633 — 215 — — 9,848 Commercial and multifamily residential: Commercial land 10,363 — — — — 10,363 Income property 19,680 — — — — 19,680 Owner occupied 35,944 — 353 — — 36,297 Real estate construction: One-to-four family residential: Land and acquisition 151 — 2 — — 153 Commercial and multifamily residential: Income property 507 — — — — 507 Consumer 9,326 — 439 — — 9,765 Total $ 94,337 $ — $ 1,948 $ — $ — 96,285 Less: Valuation discount resulting from acquisition accounting 6,525 ALLL 3,611 PCI loans, net $ 86,149

Other Real Estate Owned

Other Real Estate Owned	6 Months Ended
	Jun. 30, 2019
Other Real Estate, Foreclosed Assets, and Repossessed Assets [Abstract]
Other Real Estate Owned	Other Real Estate Owned The following tables set forth activity in OREO for the three and six months ended June 30, 2019 and 2018 : Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (in thousands) Balance, beginning of period $ 6,075 $ 11,507 $ 6,019 $ 13,298 Transfers in — — 386 406 Valuation adjustments — (110 ) (195 ) (202 ) Proceeds from sale of OREO property (5,673 ) (3,759 ) (5,794 ) (5,821 ) Gain (loss) on sale of OREO, net 716 (558 ) 702 (601 ) Balance, end of period $ 1,118 $ 7,080 $ 1,118 $ 7,080 At June 30, 2019 , there were $311 thousand in foreclosed residential real estate properties held as OREO and the recorded investment of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings were in process was $586 thousand .

Goodwill and Intangible Assets

Goodwill and Intangible Assets	6 Months Ended
	Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Goodwill and Other Intangible Assets In accordance with the Intangibles – Goodwill and Other topic of the FASB ASC, goodwill is not amortized but is reviewed for potential impairment at the reporting unit level. Management analyzes its goodwill for impairment on an annual basis on July 31 and between annual tests in certain circumstances such as material adverse changes in legal, business, regulatory and economic factors. An impairment loss is recorded to the extent that the carrying amount of goodwill exceeds its implied fair value. The CDI is evaluated for impairment if events and circumstances indicate a possible impairment. The CDI is amortized on an accelerated basis over an estimated life of 10 years . The following table sets forth activity for goodwill and other intangible assets for the periods indicated: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (in thousands) Goodwill Total goodwill $ 765,842 $ 765,842 $ 765,842 $ 765,842 Other intangible assets, net CDI: Gross CDI balance at beginning of period 105,473 105,473 105,473 105,473 Accumulated amortization at beginning of period (63,203 ) (51,407 ) (60,455 ) (48,219 ) CDI, net at beginning of period 42,270 54,066 45,018 57,254 CDI current period amortization (2,649 ) (3,088 ) (5,397 ) (6,276 ) Total CDI, net at end of period 39,621 50,978 39,621 50,978 Intangible assets not subject to amortization 919 919 919 919 Other intangible assets, net at end of period 40,540 51,897 40,540 51,897 Total goodwill and other intangible assets at end of period $ 806,382 $ 817,739 $ 806,382 $ 817,739 The following table provides the estimated future amortization expense of our CDI for the remaining six months ending December 31, 2019 and the succeeding four years: Year ending December 31, (in thousands) 2019 $ 5,082 2020 8,724 2021 7,264 2022 5,880 2023 4,552

Leases

Leases	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Lessee, Operating Leases [Text Block]	Leases The Company’s lease commitments consist primarily of leased locations under various non-cancellable operating leases that expire between 2019 and 2043 . The majority of the leases contain renewal options and provisions for increases in rental rates based on an agreed upon index or predetermined escalation schedule. The following table shows the details of the Company’s operating lease right-of-use asset and the associated lease liability for the period indicated: Item Balance Sheet Location June 30, 2019 (in thousands) Operating lease asset Other assets $ 47,875 Operating lease liability Other liabilities $ 53,875 At June 30, 2019 , the Company’s operating leases have a weighted-average remaining lease term of 7.7 years and a weighted average discount rate of 3.2% . Cash paid for amounts included in the measurement of operating lease liabilities was $5.6 million for the six months ended June 30, 2019 . Right-of-use assets obtained in exchange for new operating lease liabilities during the six months ended June 30, 2019 was $3.6 million . The following table shows the components of net lease costs: Three Months Ended June 30, Six Months Ended June 30, Item Statement of Income Location 2019 2019 (in thousands) Operating lease cost (1) Occupancy $ 2,765 $ 5,585 Variable lease cost Occupancy 517 1,023 Sublease income Occupancy (306 ) (621 ) Net lease cost $ 2,976 $ 5,987 __________ (1) Includes short-term lease costs, which are immaterial. The following table shows future minimum payments for operating leases for the remaining six months of 2019 and subsequent years: Year ending December 31, (in thousands) 2019 $ 5,494 2020 10,244 2021 9,223 2022 8,611 2023 7,332 Thereafter 20,448 Total future minimum lease payments 61,352 Amounts representing interest (7,477 ) Present value of minimum lease payments $ 53,875 Future minimum lease payments for the Company’s operating leases as of December 31, 2018, prior to the adoption of the new lease guidance were as follows: Year Ending December 31, (in thousands) 2019 $ 10,947 2020 9,766 2021 8,729 2022 8,102 2023 6,796 Thereafter 18,703 Total minimum payments $ 63,043

Revolving Line of Credit

Revolving Line of Credit	6 Months Ended
	Jun. 30, 2019
Line of Credit [Member]
Line of Credit Facility [Line Items]
Short-term Debt [Text Block]	Revolving Line of Credit During the second quarter of 2019, the Company entered into a $30.0 million short-term credit facility with an unaffiliated bank that matures in May 2020. This facility has a variable interest rate and provides the Company additional liquidity, if needed, for various corporate activities including the repurchase of Columbia Banking System, Inc. common stock. As of June 30, 2019 and December 31, 2018 , there was no outstanding balance. The credit agreement requires the Company to comply with certain covenants including those related to asset quality and capital levels. The Company was in compliance with all covenants associated with this facility at June 30, 2019 .

Derivatives and Balance Sheet O

Derivatives and Balance Sheet Offsetting	6 Months Ended
	Jun. 30, 2019
General Discussion of Derivative Instruments and Hedging Activities [Abstract]
Derivatives and Hedging Activities	Derivatives, Hedging Activities and Balance Sheet Offsetting The Company is exposed to certain risks arising from both its business and economic conditions. The Company principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Company manages economic risks, including interest rate, liquidity, and credit risk, primarily by managing the amount, sources, and duration of its assets and liabilities and the use of derivative financial instruments. Specifically, the Company enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the value of which are determined by interest rates. The Company’s derivative financial instruments are used to manage differences in the amount, timing, and duration of the Company’s known or expected cash receipts and its known or expected cash payments principally related to the Company’s loan portfolio. The Company’s objectives in using interest rate derivatives are to add stability to interest income and to manage its exposure to interest rate movements. To accomplish this objective, the Company uses interest rate collars as part of its interest rate risk management strategy. Interest rate collars designated as cash flow hedges involve the payments of variable-rate amounts if interest rates rise above the cap strike rate on the contract and receipts of variable-rate amounts if interest rates fall below the floor strike rate on the contract. These derivative contracts are used to hedge the variable cash flows associated with existing variable-rate assets. With respect to derivatives designated and that qualify as cash flow hedges of interest rate risk, the gain or loss on the derivative is recorded in accumulated other comprehensive income (loss) and subsequently reclassified into interest income in the same period(s) during which the hedged transaction affects earnings. Amounts reported in accumulated other comprehensive income (loss) related to derivatives will be reclassified to interest income as interest payments are received on the Company’s variable-rate assets. During the next 12 months, the Company estimates that there will be $2.1 million reclassified as an increase to interest income. In addition, the Company periodically enters into certain commercial loan interest rate swap agreements in order to provide commercial loan customers the ability to convert from variable to fixed interest rates. Under these agreements, the Company enters into a variable-rate loan agreement with a customer in addition to a swap agreement. This swap agreement effectively converts the customer’s variable rate loan into a fixed rate. The Company then enters into a corresponding swap agreement with a third-party in order to offset its exposure on the variable and fixed components of the customer agreement. As the interest rate swap agreements with the customers and third parties are not designated as hedges under the Derivatives and Hedging topic of the FASB ASC, the instruments are marked to market in earnings. The notional amount of open interest rate swap agreements at June 30, 2019 and December 31, 2018 was $373.0 million and $366.7 million , respectively. During the three and six months ended June 30, 2019 , there was $2 thousand mark-to-market loss recorded to “Other” noninterest expense. During the three and six months ended June 30, 2018 , mark-to-market gains of $2 thousand and $8 thousand , respectively, were recorded to “Other” noninterest expense. The following table presents the fair value of derivatives, as well as their classification on the Balance Sheet at June 30, 2019 and December 31, 2018 : Asset Derivatives Liability Derivatives June 30, 2019 December 31, 2018 June 30, 2019 December 31, 2018 Balance Sheet Fair Value Balance Sheet Fair Value Balance Sheet Fair Value Balance Sheet Fair Value (in thousands) Derivatives designated as hedging instruments: Interest rate collar Other assets $ 15,691 Other assets $ — Other liabilities $ — Other liabilities $ — Derivatives not designated as hedging instruments: Interest rate swap contracts Other assets $ 17,857 Other assets $ 7,033 Other liabilities $ 17,858 Other liabilities $ 7,033 The table below presents the effect of cash flow hedge accounting on accumulated other comprehensive income (loss) at June 30, 2019 and 2018 : Amount of Gain or (Loss) Recognized in Accumulated Other Comprehensive Income on Derivative Location of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income into Income Amount of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income into Income Three Months Ended June 30, Three Months Ended June 30, 2019 2018 2019 2018 (in thousands) Interest rate collar $ 9,423 $ — Interest income $ — $ — Six Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Interest rate collar $ 15,691 $ — Interest income $ — $ — The notional amount of the interest rate collar was $500.0 million at June 30, 2019 . We recorded no income statement impact for the interest rate collar for the three or six months ended June 30, 2019 and 2018 . The Company is party to interest rate swap contracts, interest rate collar and repurchase agreements that are subject to enforceable master netting arrangements or similar agreements. Under these agreements, the Company may have the right to net settle multiple contracts with the same counterparty. The following tables show the gross interest rate swap contracts, collar agreements and repurchase agreements in the Consolidated Balance Sheets and the respective collateral received or pledged in the form of cash or other financial instruments. The collateral amounts in these tables are limited to the outstanding balances of the related asset or liability. Therefore, instances of overcollateralization are not shown. Gross Amounts of Recognized Assets/Liabilities Gross Amounts Offset in the Consolidated Balance Sheets Net Amounts of Assets/Liabilities Presented in the Consolidated Balance Sheets Gross Amounts Not Offset in the Consolidated Balance Sheets Collateral Pledged/Received Net Amount June 30, 2019 (in thousands) Assets Interest rate swap contracts $ 17,857 $ — $ 17,857 $ — $ 17,857 Interest rate collar $ 15,691 $ — $ 15,691 $ (15,691 ) — Liabilities Interest rate swap contracts $ 17,858 $ — $ 17,858 $ (17,858 ) $ — Repurchase agreements $ 50,226 $ — $ 50,226 $ (50,226 ) $ — December 31, 2018 Assets Interest rate swap contracts $ 7,033 $ — $ 7,033 $ — $ 7,033 Liabilities Interest rate swap contracts $ 7,033 $ — $ 7,033 $ (3,235 ) $ 3,798 Repurchase agreements $ 61,094 $ — $ 61,094 $ (61,094 ) $ — The Company’s agreements with each of its derivative counterparties provide that if the Company defaults or is capable of being declared in default on any of its indebtedness, then the Company could also be declared in default on its derivative obligations. The following table presents the class of collateral pledged for repurchase agreements as well as the remaining contractual maturity of the repurchase agreements: Remaining contractual maturity of the agreements Overnight and continuous Up to 30 days 30 - 90 days Greater than 90 days Total June 30, 2019 (in thousands) Class of collateral pledged for repurchase agreements U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 50,226 $ — $ — $ — $ 50,226 Gross amount of recognized liabilities for repurchase agreements 50,226 Amounts related to agreements not included in offsetting disclosure $ — The collateral utilized for the Company’s repurchase agreements is subject to market fluctuations as well as prepayments of principal. The Company monitors the risk of the fair value of its pledged collateral falling below acceptable amounts based on the type of the underlying repurchase agreement. The pledged collateral related to the Company’s $50.2 million sweep repurchase agreements, which mature on an overnight basis, is monitored on a daily basis as the underlying sweep accounts can have frequent transaction activity and the amount of pledged collateral is adjusted as necessary.

Commitments and contingent liab

Commitments and contingent liabilities	6 Months Ended
	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Text Block]	Commitments and Contingent Liabilities Financial Instruments with Off-Balance Sheet Risk: In the normal course of business, the Company makes loan commitments (typically unfunded loans and unused lines of credit) and issues standby letters of credit to accommodate the financial needs of its customers. At June 30, 2019 and December 31, 2018 , the Company’s loan commitments amounted to $2.59 billion and $2.62 billion , respectively. Standby letters of credit commit the Company to make payments on behalf of customers under specified conditions. Historically, no significant losses have been incurred by the Company under standby letters of credit. Both arrangements have credit risk essentially the same as that involved in extending loans to customers and are subject to the Company’s normal credit policies, including collateral requirements, where appropriate. Standby letters of credit were $35.1 million and $28.3 million at June 30, 2019 and December 31, 2018 , respectively. In addition, there were $286 thousand commitments under commercial letters of credit used to facilitate customers’ trade transactions and other off-balance sheet liabilities at June 30, 2019 and none at December 31, 2018 , respectively. Legal Proceedings: The Company and its subsidiaries are from time to time defendants in and are threatened with various legal proceedings arising from their regular business activities. Management, after consulting with legal counsel, is of the opinion that the ultimate liability, if any, resulting from these pending or threatened actions and proceedings will not have a material effect on the financial statements of the Company.

Shareholders' Equity

Shareholders' Equity	6 Months Ended
	Jun. 30, 2019
Stockholders' Equity Note [Abstract]
Shareholders' Equity	Shareholders’ Equity Dividends: The following table summarizes year-to-date dividend activity as of June 30, 2019 : Declared Regular Cash Dividends Per Common Share Special Cash Dividends Per Common Share Record Date Paid Date January 24, 2019 $ 0.28 $ 0.14 February 6, 2019 February 20, 2019 April 25, 2019 $ 0.28 $ 0.14 May 8, 2019 May 22, 2019 Subsequent to quarter end, on July 25, 2019 , the Company declared a regular quarterly cash dividend of $0.28 per common share payable on August 21, 2019 to shareholders of record at the close of business on August 7, 2019 . The payment of cash dividends is subject to federal regulatory requirements for capital levels and other restrictions. In addition, the cash dividends paid by Columbia Bank to the Company are subject to both federal and state regulatory requirements. Share Repurchase Program: For the three and six months ended June 30, 2019 , the Company repurchased 624,158 shares of common stock at an average price of $35.03 per share. As of June 30, 2019, there are 2,275,842 remaining shares authorized to be repurchased under the current Board approved share repurchase program.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	6 Months Ended
	Jun. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Abstract]
Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income The following table shows changes in accumulated other comprehensive income (loss) by component for the three and six month periods ended June 30, 2019 and 2018 : Unrealized Gains and Losses on Available-for-Sale Securities (1) Unrealized Gains and Losses on Pension Plan Liability (1) Unrealized Gains and Losses on Hedging Instruments (1) Total (1) Three Months Ended June 30, 2019 (in thousands) Beginning balance $ 352 $ (2,116 ) $ 4,810 $ 3,046 Other comprehensive income before reclassifications 37,029 — 7,233 44,262 Amounts reclassified from accumulated other comprehensive income (2) (219 ) 61 — (158 ) Net current-period other comprehensive income 36,810 61 7,233 44,104 Ending balance $ 37,162 $ (2,055 ) $ 12,043 $ 47,150 Three Months Ended June 30, 2018 Beginning balance $ (45,748 ) $ (2,385 ) $ — $ (48,133 ) Other comprehensive loss before reclassifications (7,845 ) — — (7,845 ) Amounts reclassified from accumulated other comprehensive loss (2) (4 ) 61 — 57 Net current-period other comprehensive income (loss) (7,849 ) 61 — (7,788 ) Ending balance $ (53,597 ) $ (2,324 ) $ — $ (55,921 ) Six Months Ended June 30, 2019 Beginning balance $ (33,128 ) $ (2,177 ) $ — $ (35,305 ) Other comprehensive income before reclassifications 71,926 — 12,043 83,969 Amounts reclassified from accumulated other comprehensive loss (2) (1,636 ) 122 — (1,514 ) Net current-period other comprehensive income 70,290 122 12,043 82,455 Ending balance $ 37,162 $ (2,055 ) $ 12,043 $ 47,150 Six Months Ended June 30, 2018 Beginning balance $ (19,779 ) $ (2,446 ) $ — $ (22,225 ) Adjustment pursuant to adoption of ASU 2016-01 157 — — 157 Other comprehensive loss before reclassifications (33,893 ) — — (33,893 ) Amounts reclassified from accumulated other comprehensive loss (2) (82 ) 122 — 40 Net current-period other comprehensive income (loss) (33,975 ) 122 — (33,853 ) Ending balance $ (53,597 ) $ (2,324 ) $ — $ (55,921 ) __________ (1) All amounts are net of tax. Amounts in parenthesis indicate debits. (2) See following table for details about these reclassifications. The following table shows details regarding the reclassifications from accumulated other comprehensive income (loss) for the three and six month periods ended June 30, 2019 and 2018 : Amount Reclassified from Accumulated Other Comprehensive Income (Loss) Three Months Ended June 30, Six Months Ended June 30, Affected line Item in the Consolidated 2019 2018 2019 2018 Statement of Income (in thousands) Unrealized gains and losses on available for sale debt securities Investment securities gains, net $ 285 $ 5 $ 2,132 $ 107 Investment securities gains (losses), net 285 5 2,132 107 Total before tax (66 ) (1 ) (496 ) (25 ) Income tax provision $ 219 $ 4 $ 1,636 $ 82 Net of tax Amortization of pension plan liability Actuarial losses $ (80 ) $ (80 ) $ (159 ) $ (160 ) Compensation and employee benefits (80 ) (80 ) (159 ) (160 ) Total before tax 19 19 37 38 Income tax provision $ (61 ) $ (61 ) $ (122 ) $ (122 ) Net of tax

Fair Value Accounting and Measu

Fair Value Accounting and Measurement	6 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value Accounting and Measurement	Fair Value Accounting and Measurement The Fair Value Measurements and Disclosures topic of the FASB ASC defines fair value, establishes a consistent framework for measuring fair value and expands disclosure requirements about fair value. We hold fixed and variable rate interest-bearing securities, investments in marketable equity securities and certain other financial instruments, which are carried at fair value. Fair value is determined based upon quoted prices when available or through the use of alternative approaches, such as matrix or model pricing, when market quotes are not readily accessible or available. The valuation techniques are based upon observable and unobservable inputs. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect our own market assumptions. These two types of inputs create the following fair value hierarchy: Level 1 – Quoted prices for identical instruments in active markets that are accessible at the measurement date. Level 2 – Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model derived valuations whose inputs are observable or whose significant value drivers are observable. Level 3 – Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable. Fair values are determined as follows: Securities at fair value are priced using a combination of market activity, industry recognized information sources, yield curves, discounted cash flow models and other factors. These fair value calculations are considered a Level 2 input method under the provisions of the Fair Value Measurements and Disclosures topic of the FASB ASC for all securities other than U.S. Treasury Notes and equity securities, which are considered a Level 1 input method. Interest rate contracts and the interest rate collar are valued in models, which use as their basis, readily observable market parameters and are classified within Level 2 of the valuation hierarchy. The following table sets forth the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis at June 30, 2019 and December 31, 2018 by level within the fair value hierarchy. Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement: Fair Value Fair Value Measurements at Reporting Date Using Level 1 Level 2 Level 3 June 30, 2019 (in thousands) Assets Debt securities available for sale: U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations $ 2,139,496 $ — $ 2,139,496 $ — State and municipal debt securities 509,679 — 509,679 — U.S. government agency and government-sponsored enterprise securities 214,994 — 214,994 — U.S. government securities 249 249 — — Total debt securities available for sale $ 2,864,418 $ 249 $ 2,864,169 $ — Other assets: Interest rate contracts $ 17,857 $ — $ 17,857 $ — Interest rate collar $ 15,691 $ — $ 15,691 $ — Liabilities Other liabilities: Interest rate contracts $ 17,858 $ — $ 17,858 $ — Fair Value Fair Value Measurements at Reporting Date Using Level 1 Level 2 Level 3 December 31, 2018 (in thousands) Assets Debt securities available for sale: U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations $ 2,188,290 $ — $ 2,188,290 $ — State and municipal debt securities 574,323 — 574,323 — U.S. government agency and government-sponsored enterprise securities 404,587 — 404,587 — U.S. government securities 248 248 — — Total debt securities available for sale $ 3,167,448 $ 248 $ 3,167,200 $ — Other assets: Interest rate contracts $ 7,033 $ — $ 7,033 $ — Liabilities Other liabilities: Interest rate contracts $ 7,033 $ — $ 7,033 $ — There were no transfers between Level 1 and Level 2 of the valuation hierarchy during the six month periods ended June 30, 2019 and 2018 . The Company recognizes transfers between levels of the valuation hierarchy based on the valuation level at the end of the reporting period. Nonrecurring Measurements Certain assets and liabilities are measured at fair value on a nonrecurring basis after initial recognition such as loans measured for impairment. The following method was used to estimate the fair value of impaired loans: Impaired loans —A loan is considered to be impaired when, based on current information and events, it is probable that the Company will be unable to collect all amounts due (both interest and principal) according to the contractual terms of the loan agreement. Impaired loans are measured based on the present value of expected future cash flows discounted at the loan’s effective interest rate, a loan’s observable market price, or the fair market value of the collateral less estimated costs to sell if the loan is a collateral-dependent loan. The impairment evaluations are performed in conjunction with the allowance process on a quarterly basis by officers in the Special Credits group, which reports to the Chief Credit Officer. The REASD, which also reports to the Chief Credit Officer, is responsible for obtaining appraisals from third-parties or performing internal evaluations. If an appraisal is obtained from a third-party, the REASD reviews the appraisal to evaluate the adequacy of the appraisal report, including its scope, methods, accuracy and reasonableness. The following tables set forth information related to the Company’s assets that were measured using fair value estimates on a nonrecurring basis during the current and prior year quarterly periods: Fair value at June 30, 2019 Fair Value Measurements at Reporting Date Using Losses During the Three Months Ended June 30, 2019 Losses During the Six Months Ended June 30, 2019 Level 1 Level 2 Level 3 (in thousands) Impaired loans $ 4,837 $ — $ — $ 4,837 $ 2,124 $ 2,525 $ 4,837 $ — $ — $ 4,837 $ 2,124 $ 2,525 Fair value at June 30, 2018 Fair Value Measurements at Reporting Date Using Gains During the Three Months Ended June 30, 2018 Losses During the Six Months Ended June 30, 2018 Level 1 Level 2 Level 3 (in thousands) Impaired loans $ 10,792 $ — $ — $ 10,792 $ (1,032 ) $ 3,398 $ 10,792 $ — $ — $ 10,792 $ (1,032 ) $ 3,398 The losses on impaired loans disclosed above represent the amount of the specific reserve and/or charge-offs during the period applicable to loans held at period end. The amount of the specific reserve is included in the ALLL. Quantitative information about Level 3 fair value measurements The range and weighted average of the significant unobservable inputs used to fair value our Level 3 nonrecurring assets, along with the valuation techniques used, are shown in the following table: Fair value at June 30, 2019 Valuation Technique Unobservable Input Range (Weighted Average) (1) (dollars in thousands) Impaired loans - collateral-dependent (2) $ 4,837 Fair Market Value of Collateral Adjustment to Stated Value 0.00% - 100.00% (35.67%) __________ (1) Discount applied to appraised value or stated value (in the case of accounts receivable, fixed assets and inventory). (2) Collateral consists of cash, accounts receivable, fixed assets, inventory and real estate. Fair value at June 30, 2018 Valuation Technique Unobservable Input Range (Weighted Average) (1) (dollars in thousands) Impaired loans - collateral-dependent (2) $ 6,933 Fair Market Value of Collateral Adjustment to Stated Value 0.00% - 62.81% (15.72%) Impaired loans - other $ 3,859 Discounted Cash Flow Discount Rate 4.25% - 6.50% (6.12%) __________ (1) Discount rate applied to discounted cash flow valuation or discount applied to appraisal value or stated value (in the case of accounts receivable, fixed assets and inventory). (2) Collateral consists of accounts receivable, fixed assets, inventory and real estate. The following tables summarize carrying amounts and estimated fair values of selected financial instruments by level within the fair value hierarchy at June 30, 2019 and December 31, 2018 : June 30, 2019 Carrying Fair Level 1 Level 2 Level 3 (in thousands) Assets Cash and due from banks $ 224,327 $ 224,327 $ 224,327 $ — $ — Interest-earning deposits with banks 34,332 34,332 34,332 — — Debt securities available for sale 2,864,418 2,864,418 249 2,864,169 — FHLB stock 29,800 29,800 — 29,800 — Loans held for sale 12,189 12,189 — 12,189 — Loans 8,566,473 8,745,513 — — 8,745,513 Interest rate contracts 17,857 17,857 — 17,857 — Interest rate collar 15,691 15,691 — 15,691 — Liabilities Time deposits $ 391,496 $ 388,103 $ — $ 388,103 $ — FHLB advances 495,496 396,344 — 396,344 — Repurchase agreements 50,226 50,226 — 50,226 — Subordinated debentures 35,370 35,397 — 35,397 — Interest rate contracts 17,858 17,858 — 17,858 — December 31, 2018 Carrying Fair Level 1 Level 2 Level 3 (in thousands) Assets Cash and due from banks $ 260,180 $ 260,180 $ 260,180 $ — $ — Interest-earning deposits with banks 17,407 17,407 17,407 — — Debt securities available for sale 3,167,448 3,167,448 248 3,167,200 — FHLB stock 25,960 25,960 — 25,960 — Loans held for sale 3,849 3,849 — 3,849 — Loans 8,308,142 8,316,946 — — 8,316,946 Interest rate contracts 7,033 7,033 — 7,033 — Liabilities Time deposits $ 414,443 $ 407,659 $ — $ 407,659 $ — FHLB advances 399,523 400,085 — 400,085 — Repurchase agreements 61,094 61,094 — 61,094 — Subordinated debentures 35,462 34,897 — 34,897 — Interest rate contracts 7,033 7,033 — 7,033 —

Earnings per Common Share

Earnings per Common Share	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Earnings Per Common Share	Earnings Per Common Share The Company applies the two-class method of computing basic and diluted EPS. Under the two-class method, EPS is determined for each class of common stock and participating security according to dividends declared and participation rights in undistributed earnings. The Company issues restricted shares under share-based compensation plans which qualify as participating securities. The following table sets forth the computation of basic and diluted EPS for the three and six months ended June 30, 2019 and 2018 : Three Months Ended Six Months Ended June 30, June 30, 2019 2018 2019 2018 (in thousands except per share amounts) Basic EPS: Net income $ 51,724 $ 41,749 $ 97,595 $ 81,719 Less: Earnings allocated to participating securities: Nonvested restricted shares 378 473 838 909 Earnings allocated to common shareholders $ 51,346 $ 41,276 $ 96,757 $ 80,810 Weighted average common shares outstanding 72,451 72,385 72,486 72,343 Basic earnings per common share $ 0.71 $ 0.57 $ 1.33 $ 1.12 Diluted EPS: Earnings allocated to common shareholders $ 51,346 $ 41,276 $ 96,757 $ 80,810 Weighted average common shares outstanding 72,451 72,385 72,486 72,343 Dilutive effect of equity awards — 5 1 4 Weighted average diluted common shares outstanding 72,451 72,390 72,487 72,347 Diluted earnings per common share $ 0.71 $ 0.57 $ 1.33 $ 1.12 Potentially dilutive share options that were not included in the computation of diluted EPS because to do so would be anti-dilutive — 3 — 7

Revenue from Contracts with Cus

Revenue from Contracts with Customers	6 Months Ended
	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Text Block]	Revenue from Contracts with Customers Revenue in the scope of Topic 606, Revenue from Contracts with Customers is measured based on the consideration specified in the contract with a customer and excludes amounts collected on behalf of third parties. The vast majority of the Company’s revenue is specifically outside the scope of Topic 606. For in-scope revenue, the following is a description of principal activities, separated by the timing of revenue recognition from which the Company generates its revenue from contracts with customers. a. Revenue earned at a point in time - Examples of revenue earned at a point in time are ATM transaction fees, wire transfer fees, overdraft fees, interchange fees and foreign exchange transaction fees. Revenue is primarily based on the number and type of transactions and is generally derived from transactional information accumulated by our systems and is recognized immediately as the transactions occur or upon providing the service to complete the customer’s transaction. The Company is the principal in each of these contracts, with the exception of interchange fees, in which case we are acting as the agent and record revenue net of expenses paid to the principal. b. Revenue earned over time - The Company earns revenue from contracts with customers in a variety of ways where the revenue is earned over a period of time - generally monthly. Examples of this type of revenue are deposit account maintenance fees, investment advisory fees, merchant revenue and safe deposit box fees. Revenue is generally derived from transactional information accumulated by our systems or those of third-parties and is recognized as the related transactions occur or services are rendered to the customer. The Company recognizes revenue from contracts with customers when it satisfies its performance obligations. The Company’s performance obligations are typically satisfied as services are rendered and our contracts generally do not include multiple performance obligations. As a result, there are no contract balances as payments and services are rendered simultaneously. Payment is generally collected at the time services are rendered, monthly or quarterly. Unsatisfied performance obligations at the report date are not material to our consolidated financial statements. In certain cases, other parties are involved with providing products and services to our customers. If the Company is principal in the transaction (providing goods or services itself), revenues are reported based on the gross consideration received from the customer and any related expenses are reported gross in noninterest expense. If the Company is an agent in the transaction (arranging for another party to provide goods or services), the Company reports its net fee or commission retained as revenue. Rebates, waivers and reversals are recorded as a reduction of the transaction price either when the revenue is recognized by the Company or at the time the rebate, waiver or reversal is earned by the customer. Practical expedients The Company applies the practical expedient in paragraph 606-10-32-18 and does not adjust the consideration from customers for the effects of a significant financing component if at contract inception the period between when the entity transfers the goods or services and when the customer pays for that good or service will be one year or less. The Company pays sales commissions to its employees in accordance with certain incentive plans and in connection with obtaining certain contracts with customers. The Company applies the practical expedient in paragraph 340-40-25-4 and expenses such sales commissions when incurred if the amortization period of the asset the Company otherwise would have recognized is one year or less. Sales commissions are included in compensation and employee benefits expense. For the Company’s contracts that have an original expected duration of one year or less, the Company uses the practical expedient in paragraph 606-10-50-14 and has not disclosed the amount of the transaction price allocated to unsatisfied performance obligations as of the end of each reporting period or when the Company expects to recognize this revenue. Disaggregation of revenue The following table shows the disaggregation of revenue from contracts with customers for the three and six month periods ended June 30, 2019 and 2018 : Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (in thousands) Noninterest income: Revenue from contracts with customers: Deposit account and treasury management fees $ 9,035 $ 8,683 $ 18,015 $ 17,423 Card revenue 3,763 6,616 7,425 12,429 Financial services and trust revenue 3,425 3,219 6,382 5,949 Total revenue from contracts with customers 16,223 18,518 31,822 35,801 Other sources of noninterest income 9,425 5,174 15,522 11,034 Total noninterest income $ 25,648 $ 23,692 $ 47,344 $ 46,835

Securities (Tables)

Securities (Tables)	6 Months Ended
	Jun. 30, 2019
Debt Securities, Available-for-sale [Abstract]
Securities Available for Sale	The following table summarizes the amortized cost, gross unrealized gains and losses and the resulting fair value of debt securities available for sale: Amortized Gross Gross Fair Value June 30, 2019 (in thousands) U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 2,099,819 $ 50,980 $ (11,303 ) $ 2,139,496 State and municipal securities 503,279 7,459 (1,059 ) 509,679 U.S. government agency and government-sponsored enterprise securities 212,655 2,527 (188 ) 214,994 U.S. government securities 250 — (1 ) 249 Total $ 2,816,003 $ 60,966 $ (12,551 ) $ 2,864,418 December 31, 2018 U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 2,222,521 $ 9,236 $ (43,467 ) $ 2,188,290 State and municipal securities 579,755 2,328 (7,760 ) 574,323 U.S. government agency and government-sponsored enterprise securities 408,088 1,235 (4,736 ) 404,587 U.S. government securities 251 — (3 ) 248 Total $ 3,210,615 $ 12,799 $ (55,966 ) $ 3,167,448
Schedule of gross realized gains and losses on sales and calls of securities available for sale	The following table provides the proceeds and both gross realized gains and losses on sales of debt securities available for sale as well as other securities gains and losses for the periods indicated: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (in thousands) Proceeds from sales of debt securities available for sale $ 175,586 $ 12,569 $ 259,554 $ 32,330 Gross realized gains from sales of debt securities available for sale $ 1,510 $ 87 $ 3,357 $ 235 Gross realized losses from sales of debt securities available for sale (1,225 ) (83 ) (1,225 ) (129 ) Other securities losses, net (1) — (37 ) — (117 ) Investment securities gains, net $ 285 $ (33 ) $ 2,132 $ (11 ) __________ (1) Other securities losses, net includes net unrealized loss activity associated with equity securities for the periods ended June 30, 2018 . There were no sales of equity securities during the periods presented.
Schedule of Contractual Maturities of Investment Securities Available for Sale	The scheduled contractual maturities of debt securities available for sale at June 30, 2019 are presented as follows: June 30, 2019 Amortized Cost Fair Value (in thousands) Due within one year $ 95,802 $ 95,869 Due after one year through five years 438,632 441,541 Due after five years through ten years 1,315,811 1,361,873 Due after ten years 965,758 965,135 Total debt securities available for sale $ 2,816,003 $ 2,864,418
Carrying Value of Securities Pledged As Collateral	The following table summarizes the carrying value of securities pledged as collateral to secure public deposits, borrowings and other purposes as permitted or required by law: June 30, 2019 (in thousands) Washington and Oregon State to secure public deposits $ 280,968 FRB to secure borrowings 52,329 Other securities pledged 156,218 Total securities pledged as collateral $ 489,515
Summary of Gross Unrealized Losses and Fair Value of the Investments with Unrealized Losses	The following table shows the gross unrealized losses and fair value of the Company’s debt securities available for sale with unrealized losses that are not deemed to be other-than-temporarily impaired, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at June 30, 2019 and December 31, 2018 : Less than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized June 30, 2019 (in thousands) U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 1,165 $ (6 ) $ 785,380 $ (11,297 ) $ 786,545 $ (11,303 ) State and municipal securities 8,895 (33 ) 105,708 (1,026 ) 114,603 (1,059 ) U.S. government agency and government-sponsored enterprise securities 502 — 64,376 (188 ) 64,878 (188 ) U.S. government securities — — 249 (1 ) 249 (1 ) Total $ 10,562 $ (39 ) $ 955,713 $ (12,512 ) $ 966,275 $ (12,551 ) December 31, 2018 U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 154,622 $ (972 ) $ 1,301,387 $ (42,495 ) $ 1,456,009 $ (43,467 ) State and municipal securities 106,292 (581 ) 280,496 (7,179 ) 386,788 (7,760 ) U.S. government agency and government-sponsored enterprise securities 15,392 (45 ) 291,435 (4,691 ) 306,827 (4,736 ) U.S. government securities — — 247 (3 ) 247 (3 ) Total $ 276,306 $ (1,598 ) $ 1,873,565 $ (54,368 ) $ 2,149,871 $ (55,966 )

Loans (Tables)

Loans (Tables)	6 Months Ended
	Jun. 30, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Analysis of Loan Portfolio by Major Types of Loans	The following is an analysis of the loan portfolio by segment (net of unearned income): June 30, 2019 December 31, 2018 Loans, excluding PCI loans PCI Loans Total Loans, excluding PCI loans PCI Loans Total (in thousands) Commercial business $ 3,644,051 $ 9,330 $ 3,653,381 $ 3,438,422 $ 9,240 $ 3,447,662 Real estate: One-to-four family residential 279,091 7,557 286,648 238,367 8,017 246,384 Commercial and multifamily residential 3,913,546 58,518 3,972,064 3,846,027 62,910 3,908,937 Total real estate 4,192,637 66,075 4,258,712 4,084,394 70,927 4,155,321 Real estate construction: One-to-four family residential 201,783 143 201,926 217,790 153 217,943 Commercial and multifamily residential 255,452 498 255,950 284,394 534 284,928 Total real estate construction 457,235 641 457,876 502,184 687 502,871 Consumer 305,752 8,684 314,436 318,945 8,906 327,851 Less: Net unearned income (37,415 ) — (37,415 ) (42,194 ) — (42,194 ) Total loans, net of unearned income 8,562,260 84,730 8,646,990 8,301,751 89,760 8,391,511 Less: ALLL (77,248 ) (3,269 ) (80,517 ) (79,758 ) (3,611 ) (83,369 ) Total loans, net $ 8,485,012 $ 81,461 $ 8,566,473 $ 8,221,993 $ 86,149 $ 8,308,142 Loans held for sale $ 12,189 $ — $ 12,189 $ 3,849 $ — $ 3,849
Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Analysis of Nonaccrual Loans	The following is an analysis of nonaccrual loans as of June 30, 2019 and December 31, 2018 : June 30, 2019 December 31, 2018 Recorded Unpaid Principal Recorded Unpaid Principal (in thousands) Commercial business: Secured $ 23,982 $ 32,851 $ 35,504 $ 45,072 Unsecured 15 15 9 9 Real estate: One-to-four family residential 860 888 1,158 1,178 Commercial & multifamily residential: Commercial land 2,565 2,573 2,261 2,270 Income property 1,814 1,851 2,721 3,062 Owner occupied 7,464 7,601 9,922 10,300 Real estate construction: One-to-four family residential: Land and acquisition — — 318 318 Consumer 2,338 2,661 2,949 3,149 Total $ 39,038 $ 48,440 $ 54,842 $ 65,358
Analysis of the Aged Loan Portfolio	The following is an aging of the recorded investment of the loan portfolio as of June 30, 2019 and December 31, 2018 : Current 30 - 59 60 - 89 Greater Total Nonaccrual Total Loans June 30, 2019 (in thousands) Commercial business: Secured $ 3,471,016 $ 4,103 $ 3,294 $ — $ 7,397 $ 23,982 $ 3,502,395 Unsecured 128,865 438 — — 438 15 129,318 Real estate: One-to-four family residential 274,537 2,969 352 — 3,321 860 278,718 Commercial & multifamily residential: Commercial land 289,574 — — — — 2,565 292,139 Income property 1,946,429 1,022 — — 1,022 1,814 1,949,265 Owner occupied 1,640,358 2,981 511 — 3,492 7,464 1,651,314 Real estate construction: One-to-four family residential: Land and acquisition 1,683 — — — — — 1,683 Residential construction 199,154 — — — — — 199,154 Commercial & multifamily residential: Income property 163,074 — — — — — 163,074 Owner occupied 87,561 — 2,204 — 2,204 — 89,765 Consumer 302,323 604 170 — 774 2,338 305,435 Total $ 8,504,574 $ 12,117 $ 6,531 $ — $ 18,648 $ 39,038 $ 8,562,260 Current 30 - 59 60 - 89 Greater Total Nonaccrual Total Loans December 31, 2018 (in thousands) Commercial business: Secured $ 3,267,709 $ 5,864 $ 3,624 $ — $ 9,488 $ 35,504 $ 3,312,701 Unsecured 111,868 240 — — 240 9 112,117 Real estate: One-to-four family residential 233,941 694 233 — 927 1,158 236,026 Commercial & multifamily residential: Commercial land 283,416 — — — — 2,261 285,677 Income property 1,910,505 5,009 2,241 — 7,250 2,721 1,920,476 Owner occupied 1,606,085 1,744 — — 1,744 9,922 1,617,751 Real estate construction: One-to-four family residential: Land and acquisition 4,099 — — — — 318 4,417 Residential construction 212,303 93 — — 93 — 212,396 Commercial & multifamily residential: Income property 194,912 — — — — — 194,912 Owner occupied 79,805 7,258 — — 7,258 — 87,063 Consumer 314,008 1,057 201 — 1,258 2,949 318,215 Total $ 8,218,651 $ 21,959 $ 6,299 $ — $ 28,258 $ 54,842 $ 8,301,751
Impaired Financing Receivables	The following is an analysis of impaired loans as of June 30, 2019 and December 31, 2018 : Recorded Investment Recorded Investment Impaired Loans With Impaired Loans Without Recorded Unpaid Related Recorded Unpaid June 30, 2019 (in thousands) Commercial business: Secured $ 3,485,136 $ 17,259 $ 4,432 $ 5,661 $ 740 $ 12,827 $ 16,997 Unsecured 129,302 16 16 16 — — — Real estate: One-to-four family residential 277,873 845 315 596 6 530 755 Commercial & multifamily residential: Commercial land 289,277 2,862 2,233 2,241 666 629 667 Income property 1,947,936 1,329 — — — 1,329 1,362 Owner occupied 1,641,023 10,291 3,129 4,614 43 7,162 7,272 Real estate construction: One-to-four family residential: Land and acquisition 1,683 — — — — — — Residential construction 199,154 — — — — — — Commercial & multifamily residential: Income property 163,074 — — — — — — Owner occupied 89,765 — — — — — — Consumer 301,978 3,457 1,141 1,275 20 2,316 2,460 Total $ 8,526,201 $ 36,059 $ 11,266 $ 14,403 $ 1,475 $ 24,793 $ 29,513 Recorded Investment Recorded Investment Impaired Loans With Impaired Loans Without Recorded Unpaid Related Recorded Unpaid December 31, 2018 (in thousands) Commercial business: Secured $ 3,286,416 $ 26,285 $ 6,350 $ 8,460 $ 2,023 $ 19,935 $ 24,404 Unsecured 112,097 20 20 20 — — — Real estate: One-to-four family residential 235,138 888 325 798 8 563 575 Commercial & multifamily residential: Commercial land 283,451 2,226 — — — 2,226 2,272 Income property 1,917,522 2,954 99 165 1 2,855 3,011 Owner occupied 1,605,042 12,709 3,231 4,666 69 9,478 9,750 Real estate construction: One-to-four family residential: Land and acquisition 4,417 — — — — — — Residential construction 212,396 — — — — — — Commercial & multifamily residential: Income property 194,912 — — — — — — Owner occupied 87,063 — — — — — — Consumer 314,193 4,022 3,326 3,584 31 696 704 Total $ 8,252,647 $ 49,104 $ 13,351 $ 17,693 $ 2,132 $ 35,753 $ 40,716 The following table provides additional information on impaired loans for the three and six month periods indicated: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Average Recorded Interest Recognized Average Recorded Interest Recognized Average Recorded Interest Recognized Average Recorded Interest Recognized (in thousands) Commercial business: Secured $ 23,733 $ 18 $ 45,716 $ 85 $ 24,584 $ 29 $ 43,815 $ 97 Unsecured 18 — 444 1 18 1 304 1 Real estate: One-to-four family residential 855 12 780 12 866 18 818 18 Commercial & multifamily residential: Commercial land 2,864 8 2,557 — 2,651 15 2,467 — Income property 1,325 — 2,846 32 1,868 — 3,572 62 Owner occupied 13,421 147 8,768 124 13,184 193 8,741 209 Real estate construction: One-to-four family residential: Residential construction — — 605 — — — 807 — Commercial & multifamily residential: Owner occupied — — 4,050 51 — — 4,050 102 Consumer 3,456 21 6,391 34 3,644 37 6,599 77 Total $ 45,672 $ 206 $ 72,157 $ 339 $ 46,815 $ 293 $ 71,173 $ 566
Analysis of loans classified as Troubled Debt Restructurings (“TDR”)	The following is an analysis of loans classified as TDR during the three and six months ended June 30, 2019 and 2018 : Three Months Ended June 30, 2019 Three Months Ended June 30, 2018 Number of TDR Modifications Pre-Modification Post-Modification Number of TDR Modifications Pre-Modification Post-Modification (dollars in thousands) Commercial business: Secured 3 $ 918 $ 918 7 $ 2,644 $ 2,644 Consumer 4 118 118 8 1,274 1,274 Total 7 $ 1,036 $ 1,036 15 $ 3,918 $ 3,918 Six Months Ended June 30, 2019 Six Months Ended June 30, 2018 Number of TDR Modifications Pre-Modification Post-Modification Number of TDR Modifications Pre-Modification Post-Modification (dollars in thousands) Commercial business: Secured 5 $ 1,534 $ 1,534 8 $ 3,094 $ 3,094 Real estate: Commercial and multifamily residential: Income property 1 217 217 1 891 891 Consumer 4 118 118 15 2,417 2,417 Total 10 $ 1,869 $ 1,869 24 $ 6,402 $ 6,402
Purchased Credit Impaired Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Analysis of Loan Portfolio by Major Types of Loans	The following is an analysis of our PCI loans, net of related ALLL and remaining valuation discounts as of June 30, 2019 and December 31, 2018 : June 30, 2019 December 31, 2018 (in thousands) Commercial business $ 9,578 $ 9,672 Real estate: One-to-four family residential 9,019 9,848 Commercial and multifamily residential 61,372 66,340 Total real estate 70,391 76,188 Real estate construction: One-to-four family residential 143 153 Commercial and multifamily residential 474 507 Total real estate construction 617 660 Consumer 9,402 9,765 Subtotal of PCI loans 89,988 96,285 Less: Valuation discount resulting from acquisition accounting 5,258 6,525 ALLL 3,269 3,611 PCI loans, net of valuation discounts and allowance for loan losses $ 81,461 $ 86,149
Changes in Accretable Yield for Acquired Loans	The following table shows the changes in accretable yield for PCI loans for the three and six months ended June 30, 2019 and 2018 : Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (in thousands) Balance at beginning of period $ 21,849 $ 29,355 $ 21,949 $ 31,176 Accretion (1,999 ) (1,937 ) (3,576 ) (4,202 ) Disposals 3 (7 ) 106 (166 ) Reclassifications to (from) nonaccretable difference 1,136 (2,061 ) 2,510 (1,458 ) Balance at end of period $ 20,989 $ 25,350 $ 20,989 $ 25,350

Allowance for Loan and Lease _2

Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Tables)	6 Months Ended
	Jun. 30, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Credit Losses on Financing Receivables	The following tables show a detailed analysis of the ALLL for the three and six months ended June 30, 2019 and 2018 : Beginning Charge-offs Recoveries Provision (Recapture) Ending Specific General Three Months Ended June 30, 2019 (in thousands) Commercial business: Secured $ 43,617 $ (4,103 ) $ 515 $ (2,167 ) $ 37,862 $ 740 $ 37,122 Unsecured 2,495 (15 ) 32 498 3,010 — 3,010 Real estate: One-to-four family residential 616 — 20 9 645 6 639 Commercial & multifamily residential: Commercial land 4,588 — 7 814 5,409 666 4,743 Income property 5,018 — 25 282 5,325 — 5,325 Owner occupied 4,966 — 1 263 5,230 43 5,187 Real estate construction: One-to-four family residential: Land and acquisition 407 — 72 (326 ) 153 — 153 Residential construction 5,466 — 589 48 6,103 — 6,103 Commercial & multifamily residential: Income property 4,517 — 1 (320 ) 4,198 — 4,198 Owner occupied 2,220 — — 192 2,412 — 2,412 Consumer 5,545 (354 ) 178 (175 ) 5,194 20 5,174 PCI 3,245 (815 ) 872 (33 ) 3,269 — 3,269 Unallocated 574 — — 1,133 1,707 — 1,707 Total $ 83,274 $ (5,287 ) $ 2,312 $ 218 $ 80,517 $ 1,475 $ 79,042 Beginning Charge-offs Recoveries Provision (Recapture) Ending Specific General Six Months Ended June 30, 2019 (in thousands) Commercial business: Secured $ 43,188 $ (5,352 ) $ 838 $ (812 ) $ 37,862 $ 740 $ 37,122 Unsecured 2,626 (15 ) 189 210 3,010 — 3,010 Real estate: One-to-four family residential 593 (2 ) 37 17 645 6 639 Commercial & multifamily residential: Commercial land 3,947 — 14 1,448 5,409 666 4,743 Income property 4,044 — 48 1,233 5,325 — 5,325 Owner occupied 4,533 — 2 695 5,230 43 5,187 Real estate construction: One-to-four family residential: Land and acquisition 549 — 131 (527 ) 153 — 153 Residential construction 5,536 (170 ) 590 147 6,103 — 6,103 Commercial & multifamily residential: Income property 5,784 — 1 (1,587 ) 4,198 — 4,198 Owner occupied 2,604 — — (192 ) 2,412 — 2,412 Consumer 5,301 (832 ) 416 309 5,194 20 5,174 PCI 3,611 (1,904 ) 1,577 (15 ) 3,269 — 3,269 Unallocated 1,053 — — 654 1,707 — 1,707 Total $ 83,369 $ (8,275 ) $ 3,843 $ 1,580 $ 80,517 $ 1,475 $ 79,042 Beginning Charge-offs Recoveries Provision (Recapture) Ending Specific General Three Months Ended June 30, 2018 (in thousands) Commercial business: Secured $ 37,331 $ (5,751 ) $ 1,487 $ 7,283 $ 40,350 $ 67 $ 40,283 Unsecured 2,595 (24 ) 56 (184 ) 2,443 — 2,443 Real estate: One-to-four family residential 558 — 196 (293 ) 461 8 453 Commercial & multifamily residential: Commercial land 3,745 — 78 (545 ) 3,278 — 3,278 Income property 4,702 — 558 (1,158 ) 4,102 — 4,102 Owner occupied 4,749 — 4 (397 ) 4,356 86 4,270 Real estate construction: One-to-four family residential: Land and acquisition 912 — 12 (76 ) 848 — 848 Residential construction 4,636 — 2 (66 ) 4,572 — 4,572 Commercial & multifamily residential: Income property 7,474 — — (107 ) 7,367 — 7,367 Owner occupied 1,923 — — 376 2,299 — 2,299 Consumer 5,216 (232 ) 270 38 5,292 95 5,197 PCI 5,665 (1,235 ) 927 (575 ) 4,782 — 4,782 Unallocated 321 — — (321 ) — — — Total $ 79,827 $ (7,242 ) $ 3,590 $ 3,975 $ 80,150 $ 256 $ 79,894 Beginning Charge-offs Recoveries Provision (Recapture) Ending Specific General Six Months Ended June 30, 2018 (in thousands) Commercial business: Secured $ 29,341 $ (8,165 ) $ 2,040 $ 17,134 $ 40,350 $ 67 $ 40,283 Unsecured 2,000 (87 ) 305 225 2,443 — 2,443 Real estate: One-to-four family residential 701 — 368 (608 ) 461 8 453 Commercial & multifamily residential: Commercial land 4,265 — 84 (1,071 ) 3,278 — 3,278 Income property 5,672 (223 ) 699 (2,046 ) 4,102 — 4,102 Owner occupied 5,459 — 16 (1,119 ) 4,356 86 4,270 Real estate construction: One-to-four family residential: Land and acquisition 963 — 28 (143 ) 848 — 848 Residential construction 3,709 — 5 858 4,572 — 4,572 Commercial & multifamily residential: Income property 7,053 — — 314 7,367 — 7,367 Owner occupied 4,413 — — (2,114 ) 2,299 — 2,299 Consumer 5,163 (496 ) 530 95 5,292 95 5,197 PCI 6,907 (2,578 ) 2,151 (1,698 ) 4,782 — 4,782 Unallocated — — — — — — — Total $ 75,646 $ (11,549 ) $ 6,226 $ 9,827 $ 80,150 $ 256 $ 79,894
Changes in the Allowance for Unfunded Commitments and Letters of Credit	Changes in the allowance for unfunded commitments and letters of credit, a component of “Other liabilities” in the Consolidated Balance Sheets, are summarized as follows: Three Months Ended Six Months Ended June 30, June 30, 2019 2018 2019 2018 (in thousands) Balance at beginning of period $ 3,780 $ 4,330 $ 4,330 $ 3,130 Net changes in the allowance for unfunded commitments and letters of credit 200 (650 ) (350 ) 550 Balance at end of period $ 3,980 $ 3,680 $ 3,980 $ 3,680
Financing Receivable Credit Quality Indicators	The following is an analysis of the credit quality of our loan portfolio, excluding PCI loans, as of June 30, 2019 and December 31, 2018 : Pass Special Mention Substandard Doubtful Loss Total June 30, 2019 (in thousands) Loans, excluding PCI loans: Commercial business: Secured $ 3,371,298 $ 35,506 $ 95,591 $ — $ — $ 3,502,395 Unsecured 129,098 — 220 — — 129,318 Real estate: One-to-four family residential 277,407 — 1,311 — — 278,718 Commercial and multifamily residential: Commercial land 277,564 2,426 12,149 — — 292,139 Income property 1,904,020 547 44,698 — — 1,949,265 Owner occupied 1,590,785 10,100 50,429 — — 1,651,314 Real estate construction: One-to-four family residential: Land and acquisition 1,683 — — — — 1,683 Residential construction 199,154 — — — — 199,154 Commercial and multifamily residential: Income property 163,074 — — — — 163,074 Owner occupied 88,917 — 848 — — 89,765 Consumer 301,826 — 3,609 — — 305,435 Total $ 8,304,826 $ 48,579 $ 208,855 $ — $ — 8,562,260 Less: ALLL 77,248 Loans, excluding PCI loans, net $ 8,485,012 Pass Special Mention Substandard Doubtful Loss Total December 31, 2018 (in thousands) Loans, excluding PCI loans: Commercial business: Secured $ 3,160,910 $ 48,779 $ 103,007 $ 5 $ — $ 3,312,701 Unsecured 112,091 21 — 5 — 112,117 Real estate: One-to-four family residential 234,416 — 1,610 — — 236,026 Commercial and multifamily residential: Commercial land 276,348 5,082 4,247 — — 285,677 Income property 1,876,925 36,998 6,553 — — 1,920,476 Owner occupied 1,556,852 14,964 45,935 — — 1,617,751 Real estate construction: One-to-four family residential: Land and acquisition 4,099 — 318 — — 4,417 Residential construction 212,225 — 171 — — 212,396 Commercial and multifamily residential: Income property 194,912 — — — — 194,912 Owner occupied 87,063 — — — — 87,063 Consumer 313,817 — 4,398 — — 318,215 Total $ 8,029,658 $ 105,844 $ 166,239 $ 10 $ — 8,301,751 Less: ALLL 79,758 Loans, excluding PCI loans, net $ 8,221,993 The following is an analysis of the credit quality of our PCI loan portfolio as of June 30, 2019 and December 31, 2018 : Pass Special Mention Substandard Doubtful Loss Total June 30, 2019 (in thousands) PCI loans: Commercial business: Secured $ 6,910 $ 964 $ 767 $ — $ — $ 8,641 Unsecured 937 — — — — 937 Real estate: One-to-four family residential 8,340 — 679 — — 9,019 Commercial and multifamily residential: Commercial land 9,012 646 72 — — 9,730 Income property 18,294 — — — — 18,294 Owner occupied 26,985 — 6,363 — — 33,348 Real estate construction: One-to-four family residential: Land and acquisition 143 — — — — 143 Residential construction — — — — — — Commercial and multifamily residential: Income property 474 — — — — 474 Owner occupied — — — — — — Consumer 9,024 — 378 — — 9,402 Total $ 80,119 $ 1,610 $ 8,259 $ — $ — 89,988 Less: Valuation discount resulting from acquisition accounting 5,258 ALLL 3,269 PCI loans, net $ 81,461 Pass Special Mention Substandard Doubtful Loss Total December 31, 2018 (in thousands) PCI loans: Commercial business: Secured $ 8,041 $ — $ 840 $ — $ — $ 8,881 Unsecured 692 — 99 — — 791 Real estate: One-to-four family residential 9,633 — 215 — — 9,848 Commercial and multifamily residential: Commercial land 10,363 — — — — 10,363 Income property 19,680 — — — — 19,680 Owner occupied 35,944 — 353 — — 36,297 Real estate construction: One-to-four family residential: Land and acquisition 151 — 2 — — 153 Commercial and multifamily residential: Income property 507 — — — — 507 Consumer 9,326 — 439 — — 9,765 Total $ 94,337 $ — $ 1,948 $ — $ — 96,285 Less: Valuation discount resulting from acquisition accounting 6,525 ALLL 3,611 PCI loans, net $ 86,149

Other Real Estate Owned (Tables

Other Real Estate Owned (Tables)	6 Months Ended
	Jun. 30, 2019
Other Real Estate, Foreclosed Assets, and Repossessed Assets [Abstract]
Summary of Other Real Estate Owned	The following tables set forth activity in OREO for the three and six months ended June 30, 2019 and 2018 : Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (in thousands) Balance, beginning of period $ 6,075 $ 11,507 $ 6,019 $ 13,298 Transfers in — — 386 406 Valuation adjustments — (110 ) (195 ) (202 ) Proceeds from sale of OREO property (5,673 ) (3,759 ) (5,794 ) (5,821 ) Gain (loss) on sale of OREO, net 716 (558 ) 702 (601 ) Balance, end of period $ 1,118 $ 7,080 $ 1,118 $ 7,080

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill and Intangible Assets	The following table sets forth activity for goodwill and other intangible assets for the periods indicated: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (in thousands) Goodwill Total goodwill $ 765,842 $ 765,842 $ 765,842 $ 765,842 Other intangible assets, net CDI: Gross CDI balance at beginning of period 105,473 105,473 105,473 105,473 Accumulated amortization at beginning of period (63,203 ) (51,407 ) (60,455 ) (48,219 ) CDI, net at beginning of period 42,270 54,066 45,018 57,254 CDI current period amortization (2,649 ) (3,088 ) (5,397 ) (6,276 ) Total CDI, net at end of period 39,621 50,978 39,621 50,978 Intangible assets not subject to amortization 919 919 919 919 Other intangible assets, net at end of period 40,540 51,897 40,540 51,897 Total goodwill and other intangible assets at end of period $ 806,382 $ 817,739 $ 806,382 $ 817,739
Estimated Future Amortization Expense of Core Deposit Intangibles	The following table provides the estimated future amortization expense of our CDI for the remaining six months ending December 31, 2019 and the succeeding four years: Year ending December 31, (in thousands) 2019 $ 5,082 2020 8,724 2021 7,264 2022 5,880 2023 4,552

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Operating Leases by balance sheet location [Table Text Block]	The following table shows the details of the Company’s operating lease right-of-use asset and the associated lease liability for the period indicated: Item Balance Sheet Location June 30, 2019 (in thousands) Operating lease asset Other assets $ 47,875 Operating lease liability Other liabilities $ 53,875
Lease, Cost [Table Text Block]	The following table shows the components of net lease costs: Three Months Ended June 30, Six Months Ended June 30, Item Statement of Income Location 2019 2019 (in thousands) Operating lease cost (1) Occupancy $ 2,765 $ 5,585 Variable lease cost Occupancy 517 1,023 Sublease income Occupancy (306 ) (621 ) Net lease cost $ 2,976 $ 5,987
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	The following table shows future minimum payments for operating leases for the remaining six months of 2019 and subsequent years: Year ending December 31, (in thousands) 2019 $ 5,494 2020 10,244 2021 9,223 2022 8,611 2023 7,332 Thereafter 20,448 Total future minimum lease payments 61,352 Amounts representing interest (7,477 ) Present value of minimum lease payments $ 53,875
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	Future minimum lease payments for the Company’s operating leases as of December 31, 2018, prior to the adoption of the new lease guidance were as follows: Year Ending December 31, (in thousands) 2019 $ 10,947 2020 9,766 2021 8,729 2022 8,102 2023 6,796 Thereafter 18,703 Total minimum payments $ 63,043

Derivatives and Balance Sheet_2

Derivatives and Balance Sheet Offsetting (Tables)	6 Months Ended
	Jun. 30, 2019
Derivative [Line Items]
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]	The table below presents the effect of cash flow hedge accounting on accumulated other comprehensive income (loss) at June 30, 2019 and 2018 : Amount of Gain or (Loss) Recognized in Accumulated Other Comprehensive Income on Derivative Location of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income into Income Amount of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income into Income Three Months Ended June 30, Three Months Ended June 30, 2019 2018 2019 2018 (in thousands) Interest rate collar $ 9,423 $ — Interest income $ — $ — Six Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Interest rate collar $ 15,691 $ — Interest income $ — $ —
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	The following table presents the fair value of derivatives, as well as their classification on the Balance Sheet at June 30, 2019 and December 31, 2018 : Asset Derivatives Liability Derivatives June 30, 2019 December 31, 2018 June 30, 2019 December 31, 2018 Balance Sheet Fair Value Balance Sheet Fair Value Balance Sheet Fair Value Balance Sheet Fair Value (in thousands) Derivatives designated as hedging instruments: Interest rate collar Other assets $ 15,691 Other assets $ — Other liabilities $ — Other liabilities $ — Derivatives not designated as hedging instruments: Interest rate swap contracts Other assets $ 17,857 Other assets $ 7,033 Other liabilities $ 17,858 Other liabilities $ 7,033
Balance Sheet Offsetting [Table Text Block]	The following tables show the gross interest rate swap contracts, collar agreements and repurchase agreements in the Consolidated Balance Sheets and the respective collateral received or pledged in the form of cash or other financial instruments. The collateral amounts in these tables are limited to the outstanding balances of the related asset or liability. Therefore, instances of overcollateralization are not shown. Gross Amounts of Recognized Assets/Liabilities Gross Amounts Offset in the Consolidated Balance Sheets Net Amounts of Assets/Liabilities Presented in the Consolidated Balance Sheets Gross Amounts Not Offset in the Consolidated Balance Sheets Collateral Pledged/Received Net Amount June 30, 2019 (in thousands) Assets Interest rate swap contracts $ 17,857 $ — $ 17,857 $ — $ 17,857 Interest rate collar $ 15,691 $ — $ 15,691 $ (15,691 ) — Liabilities Interest rate swap contracts $ 17,858 $ — $ 17,858 $ (17,858 ) $ — Repurchase agreements $ 50,226 $ — $ 50,226 $ (50,226 ) $ — December 31, 2018 Assets Interest rate swap contracts $ 7,033 $ — $ 7,033 $ — $ 7,033 Liabilities Interest rate swap contracts $ 7,033 $ — $ 7,033 $ (3,235 ) $ 3,798 Repurchase agreements $ 61,094 $ — $ 61,094 $ (61,094 ) $ —
Carrying Value of Securities Pledged As Collateral	The following table summarizes the carrying value of securities pledged as collateral to secure public deposits, borrowings and other purposes as permitted or required by law: June 30, 2019 (in thousands) Washington and Oregon State to secure public deposits $ 280,968 FRB to secure borrowings 52,329 Other securities pledged 156,218 Total securities pledged as collateral $ 489,515
Available-for-sale Securities [Member]
Derivative [Line Items]
Carrying Value of Securities Pledged As Collateral	The following table presents the class of collateral pledged for repurchase agreements as well as the remaining contractual maturity of the repurchase agreements: Remaining contractual maturity of the agreements Overnight and continuous Up to 30 days 30 - 90 days Greater than 90 days Total June 30, 2019 (in thousands) Class of collateral pledged for repurchase agreements U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 50,226 $ — $ — $ — $ 50,226 Gross amount of recognized liabilities for repurchase agreements 50,226 Amounts related to agreements not included in offsetting disclosure $ —

Shareholders' Equity Dividends

Shareholders' Equity Dividends Declared (Tables)	6 Months Ended
	Jun. 30, 2019
Shareholders' Equity [Abstract]
Dividends Declared [Table Text Block]	The following table summarizes year-to-date dividend activity as of June 30, 2019 : Declared Regular Cash Dividends Per Common Share Special Cash Dividends Per Common Share Record Date Paid Date January 24, 2019 $ 0.28 $ 0.14 February 6, 2019 February 20, 2019 April 25, 2019 $ 0.28 $ 0.14 May 8, 2019 May 22, 2019

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	6 Months Ended
	Jun. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	The following table shows changes in accumulated other comprehensive income (loss) by component for the three and six month periods ended June 30, 2019 and 2018 : Unrealized Gains and Losses on Available-for-Sale Securities (1) Unrealized Gains and Losses on Pension Plan Liability (1) Unrealized Gains and Losses on Hedging Instruments (1) Total (1) Three Months Ended June 30, 2019 (in thousands) Beginning balance $ 352 $ (2,116 ) $ 4,810 $ 3,046 Other comprehensive income before reclassifications 37,029 — 7,233 44,262 Amounts reclassified from accumulated other comprehensive income (2) (219 ) 61 — (158 ) Net current-period other comprehensive income 36,810 61 7,233 44,104 Ending balance $ 37,162 $ (2,055 ) $ 12,043 $ 47,150 Three Months Ended June 30, 2018 Beginning balance $ (45,748 ) $ (2,385 ) $ — $ (48,133 ) Other comprehensive loss before reclassifications (7,845 ) — — (7,845 ) Amounts reclassified from accumulated other comprehensive loss (2) (4 ) 61 — 57 Net current-period other comprehensive income (loss) (7,849 ) 61 — (7,788 ) Ending balance $ (53,597 ) $ (2,324 ) $ — $ (55,921 ) Six Months Ended June 30, 2019 Beginning balance $ (33,128 ) $ (2,177 ) $ — $ (35,305 ) Other comprehensive income before reclassifications 71,926 — 12,043 83,969 Amounts reclassified from accumulated other comprehensive loss (2) (1,636 ) 122 — (1,514 ) Net current-period other comprehensive income 70,290 122 12,043 82,455 Ending balance $ 37,162 $ (2,055 ) $ 12,043 $ 47,150 Six Months Ended June 30, 2018 Beginning balance $ (19,779 ) $ (2,446 ) $ — $ (22,225 ) Adjustment pursuant to adoption of ASU 2016-01 157 — — 157 Other comprehensive loss before reclassifications (33,893 ) — — (33,893 ) Amounts reclassified from accumulated other comprehensive loss (2) (82 ) 122 — 40 Net current-period other comprehensive income (loss) (33,975 ) 122 — (33,853 ) Ending balance $ (53,597 ) $ (2,324 ) $ — $ (55,921 ) __________ (1) All amounts are net of tax. Amounts in parenthesis indicate debits. (2) See following table for details about these reclassifications.
Schedule of reclassifications from accumulated other comprehensive income [Table Text Block]	The following table shows details regarding the reclassifications from accumulated other comprehensive income (loss) for the three and six month periods ended June 30, 2019 and 2018 : Amount Reclassified from Accumulated Other Comprehensive Income (Loss) Three Months Ended June 30, Six Months Ended June 30, Affected line Item in the Consolidated 2019 2018 2019 2018 Statement of Income (in thousands) Unrealized gains and losses on available for sale debt securities Investment securities gains, net $ 285 $ 5 $ 2,132 $ 107 Investment securities gains (losses), net 285 5 2,132 107 Total before tax (66 ) (1 ) (496 ) (25 ) Income tax provision $ 219 $ 4 $ 1,636 $ 82 Net of tax Amortization of pension plan liability Actuarial losses $ (80 ) $ (80 ) $ (159 ) $ (160 ) Compensation and employee benefits (80 ) (80 ) (159 ) (160 ) Total before tax 19 19 37 38 Income tax provision $ (61 ) $ (61 ) $ (122 ) $ (122 ) Net of tax

Fair Value Accounting and Mea_2

Fair Value Accounting and Measurement (Tables)	6 Months Ended
	Jun. 30, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Assets, Quantitative Information	The following table sets forth the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis at June 30, 2019 and December 31, 2018 by level within the fair value hierarchy. Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement: Fair Value Fair Value Measurements at Reporting Date Using Level 1 Level 2 Level 3 June 30, 2019 (in thousands) Assets Debt securities available for sale: U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations $ 2,139,496 $ — $ 2,139,496 $ — State and municipal debt securities 509,679 — 509,679 — U.S. government agency and government-sponsored enterprise securities 214,994 — 214,994 — U.S. government securities 249 249 — — Total debt securities available for sale $ 2,864,418 $ 249 $ 2,864,169 $ — Other assets: Interest rate contracts $ 17,857 $ — $ 17,857 $ — Interest rate collar $ 15,691 $ — $ 15,691 $ — Liabilities Other liabilities: Interest rate contracts $ 17,858 $ — $ 17,858 $ — Fair Value Fair Value Measurements at Reporting Date Using Level 1 Level 2 Level 3 December 31, 2018 (in thousands) Assets Debt securities available for sale: U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations $ 2,188,290 $ — $ 2,188,290 $ — State and municipal debt securities 574,323 — 574,323 — U.S. government agency and government-sponsored enterprise securities 404,587 — 404,587 — U.S. government securities 248 248 — — Total debt securities available for sale $ 3,167,448 $ 248 $ 3,167,200 $ — Other assets: Interest rate contracts $ 7,033 $ — $ 7,033 $ — Liabilities Other liabilities: Interest rate contracts $ 7,033 $ — $ 7,033 $ —
Financial Assets Accounted For Fair Value On Nonrecurring Basis	The following tables set forth information related to the Company’s assets that were measured using fair value estimates on a nonrecurring basis during the current and prior year quarterly periods: Fair value at June 30, 2019 Fair Value Measurements at Reporting Date Using Losses During the Three Months Ended June 30, 2019 Losses During the Six Months Ended June 30, 2019 Level 1 Level 2 Level 3 (in thousands) Impaired loans $ 4,837 $ — $ — $ 4,837 $ 2,124 $ 2,525 $ 4,837 $ — $ — $ 4,837 $ 2,124 $ 2,525 Fair value at June 30, 2018 Fair Value Measurements at Reporting Date Using Gains During the Three Months Ended June 30, 2018 Losses During the Six Months Ended June 30, 2018 Level 1 Level 2 Level 3 (in thousands) Impaired loans $ 10,792 $ — $ — $ 10,792 $ (1,032 ) $ 3,398 $ 10,792 $ — $ — $ 10,792 $ (1,032 ) $ 3,398
Fair Value, by Balance Sheet Grouping	The following tables summarize carrying amounts and estimated fair values of selected financial instruments by level within the fair value hierarchy at June 30, 2019 and December 31, 2018 : June 30, 2019 Carrying Fair Level 1 Level 2 Level 3 (in thousands) Assets Cash and due from banks $ 224,327 $ 224,327 $ 224,327 $ — $ — Interest-earning deposits with banks 34,332 34,332 34,332 — — Debt securities available for sale 2,864,418 2,864,418 249 2,864,169 — FHLB stock 29,800 29,800 — 29,800 — Loans held for sale 12,189 12,189 — 12,189 — Loans 8,566,473 8,745,513 — — 8,745,513 Interest rate contracts 17,857 17,857 — 17,857 — Interest rate collar 15,691 15,691 — 15,691 — Liabilities Time deposits $ 391,496 $ 388,103 $ — $ 388,103 $ — FHLB advances 495,496 396,344 — 396,344 — Repurchase agreements 50,226 50,226 — 50,226 — Subordinated debentures 35,370 35,397 — 35,397 — Interest rate contracts 17,858 17,858 — 17,858 — December 31, 2018 Carrying Fair Level 1 Level 2 Level 3 (in thousands) Assets Cash and due from banks $ 260,180 $ 260,180 $ 260,180 $ — $ — Interest-earning deposits with banks 17,407 17,407 17,407 — — Debt securities available for sale 3,167,448 3,167,448 248 3,167,200 — FHLB stock 25,960 25,960 — 25,960 — Loans held for sale 3,849 3,849 — 3,849 — Loans 8,308,142 8,316,946 — — 8,316,946 Interest rate contracts 7,033 7,033 — 7,033 — Liabilities Time deposits $ 414,443 $ 407,659 $ — $ 407,659 $ — FHLB advances 399,523 400,085 — 400,085 — Repurchase agreements 61,094 61,094 — 61,094 — Subordinated debentures 35,462 34,897 — 34,897 — Interest rate contracts 7,033 7,033 — 7,033 —
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Assets, Quantitative Information	The range and weighted average of the significant unobservable inputs used to fair value our Level 3 nonrecurring assets, along with the valuation techniques used, are shown in the following table: Fair value at June 30, 2019 Valuation Technique Unobservable Input Range (Weighted Average) (1) (dollars in thousands) Impaired loans - collateral-dependent (2) $ 4,837 Fair Market Value of Collateral Adjustment to Stated Value 0.00% - 100.00% (35.67%) __________ (1) Discount applied to appraised value or stated value (in the case of accounts receivable, fixed assets and inventory). (2) Collateral consists of cash, accounts receivable, fixed assets, inventory and real estate. Fair value at June 30, 2018 Valuation Technique Unobservable Input Range (Weighted Average) (1) (dollars in thousands) Impaired loans - collateral-dependent (2) $ 6,933 Fair Market Value of Collateral Adjustment to Stated Value 0.00% - 62.81% (15.72%) Impaired loans - other $ 3,859 Discounted Cash Flow Discount Rate 4.25% - 6.50% (6.12%) __________ (1) Discount rate applied to discounted cash flow valuation or discount applied to appraisal value or stated value (in the case of accounts receivable, fixed assets and inventory). (2) Collateral consists of accounts receivable, fixed assets, inventory and real estate.

Earnings per Common Share (Tabl

Earnings per Common Share (Tables)	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Schedule of Basic and Diluted Earnings Per Share	The following table sets forth the computation of basic and diluted EPS for the three and six months ended June 30, 2019 and 2018 : Three Months Ended Six Months Ended June 30, June 30, 2019 2018 2019 2018 (in thousands except per share amounts) Basic EPS: Net income $ 51,724 $ 41,749 $ 97,595 $ 81,719 Less: Earnings allocated to participating securities: Nonvested restricted shares 378 473 838 909 Earnings allocated to common shareholders $ 51,346 $ 41,276 $ 96,757 $ 80,810 Weighted average common shares outstanding 72,451 72,385 72,486 72,343 Basic earnings per common share $ 0.71 $ 0.57 $ 1.33 $ 1.12 Diluted EPS: Earnings allocated to common shareholders $ 51,346 $ 41,276 $ 96,757 $ 80,810 Weighted average common shares outstanding 72,451 72,385 72,486 72,343 Dilutive effect of equity awards — 5 1 4 Weighted average diluted common shares outstanding 72,451 72,390 72,487 72,347 Diluted earnings per common share $ 0.71 $ 0.57 $ 1.33 $ 1.12 Potentially dilutive share options that were not included in the computation of diluted EPS because to do so would be anti-dilutive — 3 — 7

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	6 Months Ended
	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Table Text Block]	Disaggregation of revenue The following table shows the disaggregation of revenue from contracts with customers for the three and six month periods ended June 30, 2019 and 2018 : Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (in thousands) Noninterest income: Revenue from contracts with customers: Deposit account and treasury management fees $ 9,035 $ 8,683 $ 18,015 $ 17,423 Card revenue 3,763 6,616 7,425 12,429 Financial services and trust revenue 3,425 3,219 6,382 5,949 Total revenue from contracts with customers 16,223 18,518 31,822 35,801 Other sources of noninterest income 9,425 5,174 15,522 11,034 Total noninterest income $ 25,648 $ 23,692 $ 47,344 $ 46,835

Accounting Pronouncements Rec_2

Accounting Pronouncements Recently Issued Narrative - Impact of implementation of new accounting standards (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Accounting Standards Update 2016-02 [Member]
Change in other assets due to adoption of new ASU	$ 49,200
Change in other liabilities due to adoption of new ASU	$ 48,200
Accounting Standards Update 2016-01 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption			$ 46	$ 0
Retained Earnings [Member] | Accounting Standards Update 2016-02 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption		$ 782
Retained Earnings [Member] | Accounting Standards Update 2016-01 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption			$ 46	$ (157)

Securities (Summary of Gross Un

Securities (Summary of Gross Unrealized Losses and Fair Value of the Investments with Unrealized Losses) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months Fair Value	$ 10,562	$ 276,306
Less than 12 Months Unrealized Losses	(39)	(1,598)
12 Months or More Fair Value	955,713	1,873,565
12 Months or More Unrealized Losses	(12,512)	(54,368)
Total Fair Value	966,275	2,149,871
Total Unrealized Losses	(12,551)	(55,966)
U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months Fair Value	1,165	154,622
Less than 12 Months Unrealized Losses	(6)	(972)
12 Months or More Fair Value	785,380	1,301,387
12 Months or More Unrealized Losses	(11,297)	(42,495)
Total Fair Value	786,545	1,456,009
Total Unrealized Losses	(11,303)	(43,467)
State and Municipal Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months Fair Value	8,895	106,292
Less than 12 Months Unrealized Losses	(33)	(581)
12 Months or More Fair Value	105,708	280,496
12 Months or More Unrealized Losses	(1,026)	(7,179)
Total Fair Value	114,603	386,788
Total Unrealized Losses	(1,059)	(7,760)
US Government Corporations and Agencies Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months Fair Value	502	15,392
Less than 12 Months Unrealized Losses	0	(45)
12 Months or More Fair Value	64,376	291,435
12 Months or More Unrealized Losses	(188)	(4,691)
Total Fair Value	64,878	306,827
Total Unrealized Losses	(188)	(4,736)
US Government Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months Fair Value	0	0
Less than 12 Months Unrealized Losses	0	0
12 Months or More Fair Value	249	247
12 Months or More Unrealized Losses	(1)	(3)
Total Fair Value	249	247
Total Unrealized Losses	$ (1)	$ (3)

Securities (Securities Availabl

Securities (Securities Available for Sale) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Proceeds from Sale of Debt Securities, Available-for-sale	$ 175,586	$ 12,569	$ 259,554	$ 32,330
Debt securities available-for-sale, amortized cost	2,816,003		2,816,003		$ 3,210,615
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	60,966		60,966		12,799
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	12,551		12,551		55,966
Debt securities available for sale at fair value	2,864,418		2,864,418		3,167,448
U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Debt securities available-for-sale, amortized cost	2,099,819		2,099,819		2,222,521
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	50,980		50,980		9,236
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	11,303		11,303		43,467
Debt securities available for sale at fair value	2,139,496		2,139,496		2,188,290
State and Municipal Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt securities available-for-sale, amortized cost	503,279		503,279		579,755
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	7,459		7,459		2,328
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	1,059		1,059		7,760
Debt securities available for sale at fair value	509,679		509,679		574,323
U.S. Government and Government-Sponsored Enterprise Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt securities available-for-sale, amortized cost	212,655		212,655		408,088
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	2,527		2,527		1,235
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	188		188		4,736
Debt securities available for sale at fair value	214,994		214,994		404,587
US Government Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt securities available-for-sale, amortized cost	250		250		251
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0		0		0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	1		1		3
Debt securities available for sale at fair value	$ 249		$ 249		$ 248

Securities (Schedule of Contrac

Securities (Schedule of Contractual Maturities of Investment Securities Available for Sale) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Abstract]
Due within one year, Amortized Cost	$ 95,802
Due after one year through five years, Amortized Cost	438,632
Due after five years through ten years, Amortized Cost	1,315,811
Due after ten years, Amortized Cost	965,758
Debt securities available-for-sale, amortized cost	2,816,003	$ 3,210,615
Due within one year, Fair Value	95,869
Due after one year through five years, Fair Value	441,541
Due after five years through ten years, Fair Value	1,361,873
Due after ten years, Fair Value	965,135
Debt securities available-for-sale, Fair Value	$ 2,864,418	$ 3,167,448

Securities (Carrying Value of S

Securities (Carrying Value of Securities Pledged as Collateral) (Details) $ in Thousands	Jun. 30, 2019USD ($)
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Restricted	$ 489,515
Washington and Oregon State Public Deposits [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Restricted	280,968
Federal Reserve Bank Advances [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Restricted	52,329
Other Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Restricted	$ 156,218

Securities Securities (Summary

Securities Securities (Summary of Gross Realized Gains and Gross Realized Losses (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Proceeds from Sale of Debt Securities, Available-for-sale		$ 175,586	$ 12,569	$ 259,554	$ 32,330
Gross Realized Gains from sales of debt securities available for sale		1,510	87	3,357	235
Gross Realized Losses from sales of debt securities available for sale		(1,225)	(83)	(1,225)	(129)
Other securities losses, net	[1]	0	(37)	0	(117)
Investment securities gain (loss), net		$ 285	$ (33)	$ 2,132	$ (11)
[1]	Other securities losses, net includes net unrealized loss activity associated with equity securities for the periods ended June 30, 2018 . There were no sales of equity securities during the periods presented.

Securities (Narrative) (Details

Securities (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019USD ($)security	Jun. 30, 2018USD ($)	Jun. 30, 2019USD ($)security	Jun. 30, 2018USD ($)
Debt Securities, Available-for-sale [Line Items]
Proceeds from Sale of Debt Securities, Available-for-sale | $	$ 175,586	$ 12,569	$ 259,554	$ 32,330
U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	228		228
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	230		230
Municipal Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	126		126
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	134		134
U.S. Government and Government-Sponsored Enterprise Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	12		12
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	13		13
US Government Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	0		0
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	1		1

Loans (Narrative) (Details)

Loans (Narrative) (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019USD ($)contract	Jun. 30, 2018contract	Jun. 30, 2019USD ($)contract	Jun. 30, 2018contract	Dec. 31, 2018USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | contract	0	0	1	0
Loans Receivable [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	$ 3,250		$ 3,250		$ 3,220
Federal Reserve Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	$ 85		$ 85		$ 82

Loans (Analysis of Loan Portfol

Loans (Analysis of Loan Portfolio by Major Types of Loans) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, net of unearned income	$ 8,646,990		$ 8,391,511
Less: unearned income on loans	(37,415)		(42,194)
Allowance for loan losses	(80,517)	$ (83,274)	(83,369)	$ (80,150)	$ (79,827)	$ (75,646)
Loans, net	8,566,473		8,308,142
Loans held for sale	12,189		3,849
Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross	8,562,260		8,301,751
Loans, net of unearned income	8,562,260		8,301,751
Less: unearned income on loans	(37,415)		(42,194)
Allowance for loan losses	(77,248)		(79,758)
Loans, net	8,485,012		8,221,993
Loans held for sale	12,189		3,849
Purchased Credit Impaired Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross	89,988		96,285
Loans, net of unearned income	84,730		89,760
Less: unearned income on loans	0		0
Allowance for loan losses	(3,269)		(3,611)
Loans, net	81,461		86,149
Loans held for sale	0		0
Acquisition Accounting Valuation Discount on Covered Loans	5,258		6,525
Commercial Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross	3,653,381		3,447,662
Commercial Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross	3,644,051		3,438,422
Commercial Portfolio Segment [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross	9,578		9,672
Loans, net of unearned income	9,330		9,240
One-to-Four Family Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross	286,648		246,384
Allowance for loan losses	(645)	(616)	(593)	(461)	(558)	(701)
One-to-Four Family Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross	279,091		238,367
Loans, net of unearned income	278,718		236,026
One-to-Four Family Residential [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross	9,019		9,848
Loans, net of unearned income	7,557		8,017
One-to-Four Family Residential Construction [Domain]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross	201,926		217,943
One-to-Four Family Residential Construction [Domain] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross	201,783		217,790
One-to-Four Family Residential Construction [Domain] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross	143		153
Loans, net of unearned income	143		153
Commercial and Multifamily Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross	3,972,064		3,908,937
Commercial and Multifamily Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross	3,913,546		3,846,027
Commercial and Multifamily Residential [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross	61,372		66,340
Loans, net of unearned income	58,518		62,910
Real Estate Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross	4,258,712		4,155,321
Real Estate Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross	4,192,637		4,084,394
Real Estate Portfolio Segment [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross	70,391		76,188
Loans, net of unearned income	66,075		70,927
Real Estate Construction Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross	457,876		502,871
Real Estate Construction Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross	457,235		502,184
Real Estate Construction Portfolio Segment [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross	617		660
Loans, net of unearned income	641		687
Consumer Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross	314,436		327,851
Allowance for loan losses	(5,194)	$ (5,545)	(5,301)	$ (5,292)	$ (5,216)	$ (5,163)
Consumer Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross	305,752		318,945
Loans, net of unearned income	305,435		318,215
Consumer Portfolio Segment [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross	9,402		9,765
Loans, net of unearned income	8,684		8,906
Commercial and Multifamily Residential Construction [Domain]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross	255,950		284,928
Commercial and Multifamily Residential Construction [Domain] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross	255,452		284,394
Commercial and Multifamily Residential Construction [Domain] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Gross	474		507
Loans, net of unearned income	$ 498		$ 534

Loans (Analysis of Nonaccrual L

Loans (Analysis of Nonaccrual Loans) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment Nonaccrual Loans	$ 39,038	$ 54,842
Unpaid Principal Balance Nonaccrual Loans	48,440	65,358
Secured Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment Nonaccrual Loans	23,982	35,504
Unpaid Principal Balance Nonaccrual Loans	32,851	45,072
Unsecured Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment Nonaccrual Loans	15	9
Unpaid Principal Balance Nonaccrual Loans	15	9
One-to-Four Family Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment Nonaccrual Loans	860	1,158
Unpaid Principal Balance Nonaccrual Loans	888	1,178
Commercial Land [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment Nonaccrual Loans	2,565	2,261
Unpaid Principal Balance Nonaccrual Loans	2,573	2,270
Income Property Multifamily [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment Nonaccrual Loans	1,814	2,721
Unpaid Principal Balance Nonaccrual Loans	1,851	3,062
Owner Occupied [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment Nonaccrual Loans	7,464	9,922
Unpaid Principal Balance Nonaccrual Loans	7,601	10,300
Land And Acquisition [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment Nonaccrual Loans	0	318
Unpaid Principal Balance Nonaccrual Loans	0	318
Consumer Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment Nonaccrual Loans	2,338	2,949
Unpaid Principal Balance Nonaccrual Loans	$ 2,661	$ 3,149

Loans (Analysis of the Aged Loa

Loans (Analysis of the Aged Loan Portfolio) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	$ 39,038	$ 54,842
Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Current Loans	8,504,574	8,218,651
Past Due Loans	18,648	28,258
Nonaccrual Loans	39,038	54,842
Total Loans	8,562,260	8,301,751
Secured Loans [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	23,982	35,504
Secured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Current Loans	3,471,016	3,267,709
Past Due Loans	7,397	9,488
Nonaccrual Loans	23,982	35,504
Total Loans	3,502,395	3,312,701
Unsecured Loans [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	15	9
Unsecured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Current Loans	128,865	111,868
Past Due Loans	438	240
Nonaccrual Loans	15	9
Total Loans	129,318	112,117
One-to-Four Family Residential [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	860	1,158
One-to-Four Family Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Current Loans	274,537	233,941
Past Due Loans	3,321	927
Nonaccrual Loans	860	1,158
Total Loans	278,718	236,026
Commercial Land [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	2,565	2,261
Commercial Land [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Current Loans	289,574	283,416
Past Due Loans	0	0
Nonaccrual Loans	2,565	2,261
Total Loans	292,139	285,677
Income Property Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	1,814	2,721
Income Property Multifamily [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Current Loans	1,946,429	1,910,505
Past Due Loans	1,022	7,250
Nonaccrual Loans	1,814	2,721
Total Loans	1,949,265	1,920,476
Owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	7,464	9,922
Owner Occupied [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Current Loans	1,640,358	1,606,085
Past Due Loans	3,492	1,744
Nonaccrual Loans	7,464	9,922
Total Loans	1,651,314	1,617,751
Land And Acquisition [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	0	318
Land And Acquisition [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Current Loans	1,683	4,099
Past Due Loans	0	0
Nonaccrual Loans	0	318
Total Loans	1,683	4,417
Residential Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Current Loans	199,154	212,303
Past Due Loans	0	93
Nonaccrual Loans	0	0
Total Loans	199,154	212,396
Income Property Multifamily Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Current Loans	163,074	194,912
Past Due Loans	0	0
Nonaccrual Loans	0	0
Total Loans	163,074	194,912
Owner Occupied Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Current Loans	87,561	79,805
Past Due Loans	2,204	7,258
Nonaccrual Loans	0	0
Total Loans	89,765	87,063
Consumer Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	2,338	2,949
Consumer Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Current Loans	302,323	314,008
Past Due Loans	774	1,258
Nonaccrual Loans	2,338	2,949
Total Loans	305,435	318,215
Financial Asset, 60 to 89 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	6,531	6,299
Financial Asset, 60 to 89 Days Past Due [Member] | Secured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	3,294	3,624
Financial Asset, 60 to 89 Days Past Due [Member] | Unsecured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	0	0
Financial Asset, 60 to 89 Days Past Due [Member] | One-to-Four Family Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	352	233
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Land [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	0	0
Financial Asset, 60 to 89 Days Past Due [Member] | Income Property Multifamily [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	0	2,241
Financial Asset, 60 to 89 Days Past Due [Member] | Owner Occupied [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	511	0
Financial Asset, 60 to 89 Days Past Due [Member] | Land And Acquisition [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	0	0
Financial Asset, 60 to 89 Days Past Due [Member] | Residential Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	0	0
Financial Asset, 60 to 89 Days Past Due [Member] | Income Property Multifamily Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	0	0
Financial Asset, 60 to 89 Days Past Due [Member] | Owner Occupied Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	2,204	0
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	170	201
Financial Asset, 30 to 59 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	12,117	21,959
Financial Asset, 30 to 59 Days Past Due [Member] | Secured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	4,103	5,864
Financial Asset, 30 to 59 Days Past Due [Member] | Unsecured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	438	240
Financial Asset, 30 to 59 Days Past Due [Member] | One-to-Four Family Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	2,969	694
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Land [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	0	0
Financial Asset, 30 to 59 Days Past Due [Member] | Income Property Multifamily [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	1,022	5,009
Financial Asset, 30 to 59 Days Past Due [Member] | Owner Occupied [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	2,981	1,744
Financial Asset, 30 to 59 Days Past Due [Member] | Land And Acquisition [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	0	0
Financial Asset, 30 to 59 Days Past Due [Member] | Residential Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	0	93
Financial Asset, 30 to 59 Days Past Due [Member] | Income Property Multifamily Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	0	0
Financial Asset, 30 to 59 Days Past Due [Member] | Owner Occupied Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	0	7,258
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	604	1,057
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Secured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Unsecured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | One-to-Four Family Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Land [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Income Property Multifamily [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Owner Occupied [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Land And Acquisition [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Residential Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Income Property Multifamily Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Owner Occupied Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Past Due Loans	$ 0	$ 0

Loans (Analysis of Impaired Loa

Loans (Analysis of Impaired Loans) (Details) - Loans, Excluding Purchased Credit Impaired Loans [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	$ 8,526,201		$ 8,526,201		$ 8,252,647
Recorded Investment of Loans Individually Measured for Specific Impairment	36,059		36,059		49,104
Recorded Investment	24,793		24,793		35,753
Unpaid Principal Balance	29,513		29,513		40,716
Related Allowance	1,475		1,475		2,132
Average Recorded Investment Impaired Loans	45,672	$ 72,157	46,815	$ 71,173
Interest Recognized on Impaired Loans	206	339	293	566
Secured Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	3,485,136		3,485,136		3,286,416
Recorded Investment of Loans Individually Measured for Specific Impairment	17,259		17,259		26,285
Recorded Investment	4,432		4,432		6,350
Unpaid Principal Balance	5,661		5,661		8,460
Related Allowance	740		740		2,023
Average Recorded Investment Impaired Loans	23,733	45,716	24,584	43,815
Interest Recognized on Impaired Loans	18	85	29	97
Unsecured Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	129,302		129,302		112,097
Recorded Investment of Loans Individually Measured for Specific Impairment	16		16		20
Recorded Investment	16		16		20
Unpaid Principal Balance	16		16		20
Related Allowance	0		0		0
Average Recorded Investment Impaired Loans	18	444	18	304
Interest Recognized on Impaired Loans	0	1	1	1
One-to-Four Family Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	277,873		277,873		235,138
Recorded Investment of Loans Individually Measured for Specific Impairment	845		845		888
Recorded Investment	315		315		325
Unpaid Principal Balance	596		596		798
Related Allowance	6		6		8
Average Recorded Investment Impaired Loans	855	780	866	818
Interest Recognized on Impaired Loans	12	12	18	18
Commercial Land [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	289,277		289,277		283,451
Recorded Investment of Loans Individually Measured for Specific Impairment	2,862		2,862		2,226
Recorded Investment	2,233		2,233		0
Unpaid Principal Balance	2,241		2,241		0
Related Allowance	666		666		0
Average Recorded Investment Impaired Loans	2,864	2,557	2,651	2,467
Interest Recognized on Impaired Loans	8	0	15	0
Income Property Multifamily [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	1,947,936		1,947,936		1,917,522
Recorded Investment of Loans Individually Measured for Specific Impairment	1,329		1,329		2,954
Recorded Investment	0		0		99
Unpaid Principal Balance	0		0		165
Related Allowance	0		0		1
Average Recorded Investment Impaired Loans	1,325	2,846	1,868	3,572
Interest Recognized on Impaired Loans	0	32	0	62
Owner Occupied [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	1,641,023		1,641,023		1,605,042
Recorded Investment of Loans Individually Measured for Specific Impairment	10,291		10,291		12,709
Recorded Investment	3,129		3,129		3,231
Unpaid Principal Balance	4,614		4,614		4,666
Related Allowance	43		43		69
Average Recorded Investment Impaired Loans	13,421	8,768	13,184	8,741
Interest Recognized on Impaired Loans	147	124	193	209
Land And Acquisition [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	1,683		1,683		4,417
Recorded Investment of Loans Individually Measured for Specific Impairment	0		0		0
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Related Allowance	0		0		0
Residential Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	199,154		199,154		212,396
Recorded Investment of Loans Individually Measured for Specific Impairment	0		0		0
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Related Allowance	0		0		0
Average Recorded Investment Impaired Loans	0	605	0	807
Interest Recognized on Impaired Loans	0	0	0	0
Income Property Multifamily Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	163,074		163,074		194,912
Recorded Investment of Loans Individually Measured for Specific Impairment	0		0		0
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Related Allowance	0		0		0
Owner Occupied Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	89,765		89,765		87,063
Recorded Investment of Loans Individually Measured for Specific Impairment	0		0		0
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Related Allowance	0		0		0
Average Recorded Investment Impaired Loans	0	4,050	0	4,050
Interest Recognized on Impaired Loans	0	51	0	102
Consumer Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	301,978		301,978		314,193
Recorded Investment of Loans Individually Measured for Specific Impairment	3,457		3,457		4,022
Recorded Investment	1,141		1,141		3,326
Unpaid Principal Balance	1,275		1,275		3,584
Related Allowance	20		20		31
Average Recorded Investment Impaired Loans	3,456	6,391	3,644	6,599
Interest Recognized on Impaired Loans	21	$ 34	37	$ 77
Impaired Loans With Recorded Allowance [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment	11,266		11,266		13,351
Unpaid Principal Balance	14,403		14,403		17,693
Impaired Loans Without Recorded Allowance [Member] | Secured Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment	12,827		12,827		19,935
Unpaid Principal Balance	16,997		16,997		24,404
Impaired Loans Without Recorded Allowance [Member] | Unsecured Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Impaired Loans Without Recorded Allowance [Member] | One-to-Four Family Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment	530		530		563
Unpaid Principal Balance	755		755		575
Impaired Loans Without Recorded Allowance [Member] | Commercial Land [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment	629		629		2,226
Unpaid Principal Balance	667		667		2,272
Impaired Loans Without Recorded Allowance [Member] | Income Property Multifamily [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment	1,329		1,329		2,855
Unpaid Principal Balance	1,362		1,362		3,011
Impaired Loans Without Recorded Allowance [Member] | Owner Occupied [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment	7,162		7,162		9,478
Unpaid Principal Balance	7,272		7,272		9,750
Impaired Loans Without Recorded Allowance [Member] | Land And Acquisition [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Impaired Loans Without Recorded Allowance [Member] | Residential Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Impaired Loans Without Recorded Allowance [Member] | Income Property Multifamily Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Impaired Loans Without Recorded Allowance [Member] | Owner Occupied Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Impaired Loans Without Recorded Allowance [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment	2,316		2,316		696
Unpaid Principal Balance	$ 2,460		$ 2,460		$ 704

Loans Loans (Analysis of Troubl

Loans Loans (Analysis of Troubled Debt Restructurings) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019USD ($)Modificationscontract	Jun. 30, 2018USD ($)Modificationscontract	Jun. 30, 2019USD ($)Modificationscontract	Jun. 30, 2018USD ($)Modificationscontract	Dec. 31, 2018USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | contract	0	0	1	0
Financing Receivable Modifications Additional Commitment To Lend	$ 464		$ 464		$ 2,100
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	$ 0	$ 0	$ 26	$ 0
Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications	7	15	10	24
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 1,036	$ 3,918	$ 1,869	$ 6,402
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 1,036	$ 3,918	$ 1,869	$ 6,402
Loans, Excluding Purchased Credit Impaired Loans [Member] | Secured Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications	3	7	5	8
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 918	$ 2,644	$ 1,534	$ 3,094
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 918	$ 2,644	$ 1,534	$ 3,094
Loans, Excluding Purchased Credit Impaired Loans [Member] | Income Property Multifamily [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications			1	1
Financing Receivable, Troubled Debt Restructuring, Premodification			$ 217	$ 891
Financing Receivable, Troubled Debt Restructuring, Postmodification			$ 217	$ 891
Loans, Excluding Purchased Credit Impaired Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications	4	8	4	15
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 118	$ 1,274	$ 118	$ 2,417
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 118	$ 1,274	$ 118	$ 2,417

Loans Loans (Analysis of Purcha

Loans Loans (Analysis of Purchased Credit Impaired Loans - Accretable Yield Rollforward) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Loans, Analysis of Purchased Credit Impaired Loans, Accretable Yield Rollforward [Abstract]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield	$ 20,989	$ 25,350	$ 20,989	$ 25,350	$ 21,849	$ 21,949	$ 29,355	$ 31,176
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	1,999	1,937	3,576	4,202
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Disposals of Loans	(3)	7	(106)	166
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference	$ 1,136	$ (2,061)	$ 2,510	$ (1,458)

Allowance for Loan and Lease _3

Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for loan and lease losses	$ 218	$ 3,975	$ 1,580	$ 9,827

Allowance for Loan and Lease _4

Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Allowance for Loan and Lease Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 83,274	$ 79,827	$ 83,369	$ 75,646
Charged-offs	(5,287)	(7,242)	(8,275)	(11,549)
Recoveries	2,312	3,590	3,843	6,226
Provision for loan and lease losses	218	3,975	1,580	9,827
Ending balance	80,517	80,150	80,517	80,150
Specific Reserve	1,475	256	1,475	256
General Allocation	79,042	79,894	79,042	79,894
Secured Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	43,617	37,331	43,188	29,341
Charged-offs	(4,103)	(5,751)	(5,352)	(8,165)
Recoveries	515	1,487	838	2,040
Provision for loan and lease losses	(2,167)	7,283	(812)	17,134
Ending balance	37,862	40,350	37,862	40,350
Specific Reserve	740	67	740	67
General Allocation	37,122	40,283	37,122	40,283
Unsecured Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	2,495	2,595	2,626	2,000
Charged-offs	(15)	(24)	(15)	(87)
Recoveries	32	56	189	305
Provision for loan and lease losses	498	(184)	210	225
Ending balance	3,010	2,443	3,010	2,443
Specific Reserve	0	0	0	0
General Allocation	3,010	2,443	3,010	2,443
One-to-Four Family Residential [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	616	558	593	701
Charged-offs	0	0	(2)	0
Recoveries	20	196	37	368
Provision for loan and lease losses	9	(293)	17	(608)
Ending balance	645	461	645	461
Specific Reserve	6	8	6	8
General Allocation	639	453	639	453
Commercial Land [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	4,588	3,745	3,947	4,265
Charged-offs	0	0	0	0
Recoveries	7	78	14	84
Provision for loan and lease losses	814	(545)	1,448	(1,071)
Ending balance	5,409	3,278	5,409	3,278
Specific Reserve	666	0	666	0
General Allocation	4,743	3,278	4,743	3,278
Income Property Multifamily [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	5,018	4,702	4,044	5,672
Charged-offs	0	0	0	(223)
Recoveries	25	558	48	699
Provision for loan and lease losses	282	(1,158)	1,233	(2,046)
Ending balance	5,325	4,102	5,325	4,102
Specific Reserve	0	0	0	0
General Allocation	5,325	4,102	5,325	4,102
Owner Occupied [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	4,966	4,749	4,533	5,459
Charged-offs	0	0	0	0
Recoveries	1	4	2	16
Provision for loan and lease losses	263	(397)	695	(1,119)
Ending balance	5,230	4,356	5,230	4,356
Specific Reserve	43	86	43	86
General Allocation	5,187	4,270	5,187	4,270
Land And Acquisition [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	407	912	549	963
Charged-offs	0	0	0	0
Recoveries	72	12	131	28
Provision for loan and lease losses	(326)	(76)	(527)	(143)
Ending balance	153	848	153	848
Specific Reserve	0	0	0	0
General Allocation	153	848	153	848
Residential Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	5,466	4,636	5,536	3,709
Charged-offs	0	0	(170)	0
Recoveries	589	2	590	5
Provision for loan and lease losses	48	(66)	147	858
Ending balance	6,103	4,572	6,103	4,572
Specific Reserve	0	0	0	0
General Allocation	6,103	4,572	6,103	4,572
Income Property Multifamily Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	4,517	7,474	5,784	7,053
Charged-offs	0	0	0	0
Recoveries	1	0	1	0
Provision for loan and lease losses	(320)	(107)	(1,587)	314
Ending balance	4,198	7,367	4,198	7,367
Specific Reserve	0	0	0	0
General Allocation	4,198	7,367	4,198	7,367
Owner Occupied Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	2,220	1,923	2,604	4,413
Charged-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for loan and lease losses	192	376	(192)	(2,114)
Ending balance	2,412	2,299	2,412	2,299
Specific Reserve	0	0	0	0
General Allocation	2,412	2,299	2,412	2,299
Consumer Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	5,545	5,216	5,301	5,163
Charged-offs	(354)	(232)	(832)	(496)
Recoveries	178	270	416	530
Provision for loan and lease losses	(175)	38	309	95
Ending balance	5,194	5,292	5,194	5,292
Specific Reserve	20	95	20	95
General Allocation	5,174	5,197	5,174	5,197
Purchased Credit Impaired Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,245	5,665	3,611	6,907
Charged-offs	(815)	(1,235)	(1,904)	(2,578)
Recoveries	872	927	1,577	2,151
Provision for loan and lease losses	(33)	(575)	(15)	(1,698)
Ending balance	3,269	4,782	3,269	4,782
Specific Reserve	0	0	0	0
General Allocation	3,269	4,782	3,269	4,782
Unallocated Financing Receivables [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	574	321	1,053	0
Charged-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for loan and lease losses	1,133	(321)	654	0
Ending balance	1,707	0	1,707	0
Specific Reserve	0	0	0	0
General Allocation	$ 1,707	$ 0	$ 1,707	$ 0

Allowance for Loan and Lease _5

Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Changes in the Allowance for Unfunded Commitments and Letters of Credit) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Allowance For Loan And Lease Losses And Unfunded Loan Commitments And Letters Of Credit
Beginning balance	$ 3,780	$ 4,330	$ 4,330	$ 3,130
Allowance for Loan and Lease Losses, Net Changes In Unfunded Commitments and Letters Of Credit Allowance	200	(650)	(350)	550
Ending balance	$ 3,980	$ 3,680	$ 3,980	$ 3,680

Allowance for Loan and Lease _6

Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Analysis of Credit Quality of the Loan Portfolio) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 8,646,990		$ 8,391,511
Less: ALLL	80,517	$ 83,274	83,369	$ 80,150	$ 79,827	$ 75,646
Loans, net	8,566,473		8,308,142
Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	8,562,260		8,301,751
Loans and Leases Receivable, Net of Deferred Income	8,562,260		8,301,751
Less: ALLL	77,248		79,758
Loans, net	8,485,012		8,221,993
Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	89,988		96,285
Loans and Leases Receivable, Net of Deferred Income	84,730		89,760
Acquisition Accounting Valuation Discount on Purchased Credit Impaired Loans	5,258		6,525
Less: ALLL	3,269		3,611
Loans, net	81,461		86,149
Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	8,304,826		8,029,658
Pass [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	80,119		94,337
Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	48,579		105,844
Special Mention [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	1,610		0
Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	208,855		166,239
Substandard [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	8,259		1,948
Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		10
Doubtful [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Secured Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: ALLL	37,862	43,617	43,188	40,350	37,331	29,341
Secured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	3,502,395		3,312,701
Secured Loans [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	8,641		8,881
Secured Loans [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	3,371,298		3,160,910
Secured Loans [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	6,910		8,041
Secured Loans [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	35,506		48,779
Secured Loans [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	964		0
Secured Loans [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	95,591		103,007
Secured Loans [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	767		840
Secured Loans [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		5
Secured Loans [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Secured Loans [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Secured Loans [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Unsecured Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: ALLL	3,010	2,495	2,626	2,443	2,595	2,000
Unsecured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	129,318		112,117
Unsecured Loans [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	937		791
Unsecured Loans [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	129,098		112,091
Unsecured Loans [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	937		692
Unsecured Loans [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		21
Unsecured Loans [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Unsecured Loans [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	220		0
Unsecured Loans [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		99
Unsecured Loans [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		5
Unsecured Loans [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Unsecured Loans [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Unsecured Loans [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
One-to-Four Family Residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	286,648		246,384
Less: ALLL	645	616	593	461	558	701
One-to-Four Family Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	279,091		238,367
Loans and Leases Receivable, Net of Deferred Income	278,718		236,026
One-to-Four Family Residential [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	9,019		9,848
Loans and Leases Receivable, Net of Deferred Income	7,557		8,017
One-to-Four Family Residential [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	277,407		234,416
One-to-Four Family Residential [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	8,340		9,633
One-to-Four Family Residential [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
One-to-Four Family Residential [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
One-to-Four Family Residential [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	1,311		1,610
One-to-Four Family Residential [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	679		215
One-to-Four Family Residential [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
One-to-Four Family Residential [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
One-to-Four Family Residential [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
One-to-Four Family Residential [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Commercial Land [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: ALLL	5,409	4,588	3,947	3,278	3,745	4,265
Commercial Land [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	292,139		285,677
Commercial Land [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	9,730		10,363
Commercial Land [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	277,564		276,348
Commercial Land [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	9,012		10,363
Commercial Land [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	2,426		5,082
Commercial Land [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	646		0
Commercial Land [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	12,149		4,247
Commercial Land [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	72		0
Commercial Land [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Commercial Land [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Commercial Land [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Commercial Land [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Income Property Multifamily [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: ALLL	5,325	5,018	4,044	4,102	4,702	5,672
Income Property Multifamily [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	1,949,265		1,920,476
Income Property Multifamily [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	18,294		19,680
Income Property Multifamily [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	1,904,020		1,876,925
Income Property Multifamily [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	18,294		19,680
Income Property Multifamily [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	547		36,998
Income Property Multifamily [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Income Property Multifamily [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	44,698		6,553
Income Property Multifamily [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Income Property Multifamily [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Income Property Multifamily [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Income Property Multifamily [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Income Property Multifamily [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Owner Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: ALLL	5,230	4,966	4,533	4,356	4,749	5,459
Owner Occupied [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	1,651,314		1,617,751
Owner Occupied [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	33,348		36,297
Owner Occupied [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	1,590,785		1,556,852
Owner Occupied [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	26,985		35,944
Owner Occupied [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	10,100		14,964
Owner Occupied [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Owner Occupied [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	50,429		45,935
Owner Occupied [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	6,363		353
Owner Occupied [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Owner Occupied [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Owner Occupied [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Owner Occupied [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Land And Acquisition [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: ALLL	153	407	549	848	912	963
Land And Acquisition [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	1,683		4,417
Land And Acquisition [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	143		153
Land And Acquisition [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	1,683		4,099
Land And Acquisition [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	143		151
Land And Acquisition [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Land And Acquisition [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Land And Acquisition [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		318
Land And Acquisition [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		2
Land And Acquisition [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Land And Acquisition [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Land And Acquisition [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Land And Acquisition [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Residential Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: ALLL	6,103	5,466	5,536	4,572	4,636	3,709
Residential Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	199,154		212,396
Residential Construction [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0
Residential Construction [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	199,154		212,225
Residential Construction [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0
Residential Construction [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Residential Construction [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0
Residential Construction [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		171
Residential Construction [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0
Residential Construction [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Residential Construction [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0
Residential Construction [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Residential Construction [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0
Income Property Multifamily Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: ALLL	4,198	4,517	5,784	7,367	7,474	7,053
Income Property Multifamily Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	163,074		194,912
Income Property Multifamily Construction [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	474		507
Income Property Multifamily Construction [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	163,074		194,912
Income Property Multifamily Construction [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	474		507
Income Property Multifamily Construction [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Income Property Multifamily Construction [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Income Property Multifamily Construction [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Income Property Multifamily Construction [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Income Property Multifamily Construction [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Income Property Multifamily Construction [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Income Property Multifamily Construction [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Income Property Multifamily Construction [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Owner Occupied Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: ALLL	2,412	2,220	2,604	2,299	1,923	4,413
Owner Occupied Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	89,765		87,063
Owner Occupied Construction [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0
Owner Occupied Construction [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	88,917		87,063
Owner Occupied Construction [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0
Owner Occupied Construction [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Owner Occupied Construction [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0
Owner Occupied Construction [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	848		0
Owner Occupied Construction [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0
Owner Occupied Construction [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Owner Occupied Construction [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0
Owner Occupied Construction [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Owner Occupied Construction [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	314,436		327,851
Less: ALLL	5,194	$ 5,545	5,301	$ 5,292	$ 5,216	$ 5,163
Consumer Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	305,752		318,945
Loans and Leases Receivable, Net of Deferred Income	305,435		318,215
Consumer Portfolio Segment [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	9,402		9,765
Loans and Leases Receivable, Net of Deferred Income	8,684		8,906
Consumer Portfolio Segment [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	301,826		313,817
Consumer Portfolio Segment [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	9,024		9,326
Consumer Portfolio Segment [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Consumer Portfolio Segment [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Consumer Portfolio Segment [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	3,609		4,398
Consumer Portfolio Segment [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	378		439
Consumer Portfolio Segment [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Consumer Portfolio Segment [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Consumer Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	0		0
Consumer Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	$ 0		$ 0

Other Real Estate Owned (Summar

Other Real Estate Owned (Summary of Other Real Estate Owned) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Other Real Estate Owned [Line Items]
Balance, beginning of period	$ 6,075	$ 11,507	$ 6,019	$ 13,298
Transfers in	0	0	386	406
Valuation adjustments	0	(110)	(195)	(202)
Proceeds from Sale of OREO Property	5,673	3,759	5,794	5,821
Loss on sale of OREO, net	716	(558)	702	(601)
Total OREO, end of period	1,118	$ 7,080	1,118	$ 7,080
Mortgage Loans in Process of Foreclosure, Amount	586		586
One-to-Four Family Residential [Member]
Other Real Estate Owned [Line Items]
Total OREO, end of period	$ 311		$ 311

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets (Schedule of Goodwill and Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Goodwill and Intangible Assets [Roll Forward]
Total goodwill, beginning of period			$ 765,842
Total goodwill, end of period	$ 765,842	$ 765,842	765,842	$ 765,842
CDI current period amortization	(2,649)	(3,088)	(5,397)	(6,276)
Indefinite-lived Intangible Assets (Excluding Goodwill)	919	919	919	919
Other intangible assets, net	40,540	51,897	40,540	51,897		$ 45,937
Total goodwill and intangible assets, end of period	806,382	817,739	$ 806,382	817,739
Core Deposits [Member]
Goodwill and Intangible Assets [Line Items]
Estimated life of CDI, in years			10 years
Goodwill and Intangible Assets [Roll Forward]
Gross core deposit intangible balance, beginning of period					$ 105,473	105,473	$ 105,473	$ 105,473
Accumulated amortization at beginning of period					$ (63,203)	$ (60,455)	$ (51,407)	$ (48,219)
Core deposit intangible, net, beginning of period	42,270	54,066	$ 45,018	57,254
CDI current period amortization	(2,649)	(3,088)	(5,397)	(6,276)
Total core deposit intangible, end of period	$ 39,621	$ 50,978	$ 39,621	$ 50,978

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets (Estimated Future Amortization Expense of Core Deposit Intangibles) (Details) $ in Thousands	Jun. 30, 2019USD ($)
Future Amortization Expense For Core Deposit Intangibles
2019	$ 5,082
2020	8,724
2021	7,264
2022	5,880
2023	$ 4,552

Leases (Details)

Leases (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019USD ($)		Jun. 30, 2019USD ($)
Other Commitments [Line Items]
Operating Lease, Right-of-Use Asset	$ 47,875		$ 47,875
Operating Lease, Liability	$ 53,875		$ 53,875
Operating Lease, Weighted Average Remaining Lease Term	7 years 8 months 12 days		7 years 8 months 12 days
Operating Lease, Weighted Average Discount Rate, Percent	3.20%		3.20%
Operating Lease, Payments	$ 5,600
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	3,600
Operating Lease, Cost	2,765	[1]	$ 5,585	[1]
Variable Lease, Cost	517		1,023
Sublease Income	(306)		(621)
Lease, Cost	$ 2,976		$ 5,987
[1]	Includes short-term lease costs, which are immaterial.

Future minimum payments for ope

Future minimum payments for operating leases (Details) $ in Thousands	Jun. 30, 2019USD ($)
Commitments and Contingencies Disclosure [Abstract]
2019	$ 5,494
2020	10,244
2021	9,223
2022	8,611
2023	7,332
Thereafter	20,448
Total future minimum lease payments	61,352
Amounts representing interest	7,477
Present value of minimum lease payments	$ 53,875

Leases Prior disclosed minimum

Leases Prior disclosed minimum lease payments schedule (Details) $ in Thousands	Dec. 31, 2018USD ($)
Leases ASC 840 [Abstract]
2019	$ 10,947
2020	9,766
2021	8,729
2022	8,102
2023	6,796
Thereafter	18,703
Total minimum payments	$ 63,043

Revolving Line of Credit (Detai

Revolving Line of Credit (Details) $ in Thousands	Jun. 30, 2019USD ($)
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 30,000
Line of Credit [Member]
Line of Credit Facility [Line Items]
Short-term Debt	$ 0

Derivatives and Balance Sheet_3

Derivatives and Balance Sheet Offsetting (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Derivative [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax			$ (2)
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	$ 50,226		50,226
Secured Borrowings, Gross, Difference, Amount	0		0
Gain (Loss) on Interest Rate Cash Flow Hedge Ineffectiveness	0	$ 0	0	$ 0
U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Derivative [Line Items]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	50,226		50,226
Maturity Overnight [Member] | U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Derivative [Line Items]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	50,226		50,226
Maturity Less than 30 Days [Member] | U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Derivative [Line Items]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	0		0
Maturity 30 to 90 Days [Member] | U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Derivative [Line Items]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	0		0
Maturity Greater than 90 Days [Member] | U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Derivative [Line Items]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	0		0
Not Designated as Hedging Instrument [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Derivative, Notional Amount	373,000		373,000		$ 366,700
Gain (Loss) on Derivative Instruments, Net, Pretax		$ 2		$ 8
Not Designated as Hedging Instrument [Member] | Other Assets [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Fair value of asset derivative instruments	17,857		17,857		7,033
Not Designated as Hedging Instrument [Member] | Other Liabilities [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Fair value of liability derivative instruments	17,858		17,858		7,033
Designated as Hedging Instrument [Member] | Interest rate collar [Domain]
Derivative [Line Items]
Derivative, Notional Amount	500,000		500,000
Designated as Hedging Instrument [Member] | Other Assets [Member] | Interest rate collar [Domain]
Derivative [Line Items]
Fair value of asset derivative instruments	15,691		15,691		0
Designated as Hedging Instrument [Member] | Other Liabilities [Member] | Interest rate collar [Domain]
Derivative [Line Items]
Fair value of liability derivative instruments	$ 0		$ 0		$ 0

Derivatives and Balance Sheet_4

Derivatives and Balance Sheet Offsetting Balance Sheet Offsetting (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Balance Sheet Offsetting [Line Items]
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	$ 2,100		$ 2,100
Document Period End Date			Jun. 30, 2019
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)	9,423	$ 0	$ 15,691	$ 0
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	50,226		50,226
Repurchase agreements, amounts offset in balance sheet	0		0		$ 0
Repurchase agreements, net amount presented in statement of financial position	50,226		50,226		61,094
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities	(50,226)		(50,226)		(61,094)
Securities sold under agreements to repurchase, amount not offset	0		0		0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	0	$ 0	0	$ 0
Interest Rate Contracts [Member]
Balance Sheet Offsetting [Line Items]
Derivative Assets, Gross Amounts Offset in the Balance Sheets	0		0		0
Derivative Asset	17,857		17,857		7,033
Derivative, Collateral, Obligation to Return Cash	0		0		0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	17,857		17,857		7,033
Derivative Liability, Gross Amounts Offset in Balance Sheets	0		0		0
Derivative Liability	17,858		17,858		7,033
Derivative, Collateral, Right to Reclaim Cash	17,858		17,858		3,235
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	0		0		3,798
Interest rate collar [Domain]
Balance Sheet Offsetting [Line Items]
Derivative Assets, Gross Amounts Offset in the Balance Sheets	0		0
Derivative Asset	15,691		15,691
Derivative, Collateral, Obligation to Return Cash	(15,691)		(15,691)
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	0		0
Available-for-sale Securities [Member]
Balance Sheet Offsetting [Line Items]
Securities Sold under Agreements to Repurchase, Gross	50,226		50,226		61,094
Not Designated as Hedging Instrument [Member] | Interest Rate Contracts [Member] | Other Assets [Member]
Balance Sheet Offsetting [Line Items]
Fair value of asset derivative instruments	17,857		17,857		7,033
Not Designated as Hedging Instrument [Member] | Interest Rate Contracts [Member] | Other Liabilities [Member]
Balance Sheet Offsetting [Line Items]
Fair value of liability derivative instruments	17,858		17,858		7,033
Designated as Hedging Instrument [Member] | Interest rate collar [Domain] | Other Assets [Member]
Balance Sheet Offsetting [Line Items]
Fair value of asset derivative instruments	15,691		15,691		0
Designated as Hedging Instrument [Member] | Interest rate collar [Domain] | Other Liabilities [Member]
Balance Sheet Offsetting [Line Items]
Fair value of liability derivative instruments	0		0		$ 0
U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Balance Sheet Offsetting [Line Items]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	50,226		50,226
Maturity Overnight [Member] | U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]
Balance Sheet Offsetting [Line Items]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	$ 50,226		$ 50,226

Commitments and contingent li_2

Commitments and contingent liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Commitments to Extend Credit [Member]
Other Commitments [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	$ 2,590,000	$ 2,620,000
Standby Letters of Credit [Member]
Other Commitments [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	35,100	28,300
Commercial Letter of Credit and other off-balance sheet liabilities [Member]
Other Commitments [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	$ 286	$ 0

Shareholders' Equity (Details)

Shareholders' Equity (Details) - $ / shares	Jul. 25, 2019	Apr. 25, 2019	Jan. 24, 2019
Subsequent Event [Line Items]
Common Stock, Special Cash Dividends, Per Share, Declared		$ 0.14	$ 0.14
Declared quarterly cash dividend		$ 0.28	$ 0.28
Subsequent Event [Member]
Subsequent Event [Line Items]
Declared quarterly cash dividend	$ 0.28

Shareholders' Equity Share repu

Shareholders' Equity Share repurchase (Details)	3 Months Ended	6 Months Ended
	Jun. 30, 2019$ / sharesshares	Jun. 30, 2019$ / sharesshares
Equity [Abstract]
Treasury Stock, Shares, Acquired	624,158	624,158
Treasury Stock Acquired, Average Cost Per Share | $ / shares	$ 35.03	$ 35.03
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased	2,275,842	2,275,842

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Changes in AOCI by Component) (Details) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2019		Jun. 30, 2018		Jun. 30, 2019		Jun. 30, 2018		Mar. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance		$ 3,046		$ (48,133)		$ (35,305)		$ (22,225)
Other comprehensive income before reclassifications	[1]	44,262		(7,845)		83,969		(33,893)
Amounts reclassified from accumulated other comprehensive income (2)	[1]	(158)		57		(1,514)		40
Net current-period other comprehensive income	[1]	44,104		(7,788)		82,455		(33,853)
Ending balance		47,150		(55,921)		47,150		(55,921)
Unrealized Gains and Losses on Available-for-Sale Debt Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance		352		(45,748)		(33,128)		(19,779)
Other comprehensive income before reclassifications	[1]	37,029		(7,845)		71,926		(33,893)
Amounts reclassified from accumulated other comprehensive income (2)		(219)	[2]	(4)	[1]	(1,636)	[1]	(82)	[1]
Net current-period other comprehensive income	[1]	36,810		(7,849)		70,290		(33,975)
Ending balance		37,162		(53,597)		37,162		(53,597)
Unrealized Gains and Losses on Pension Plan Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance		(2,116)		(2,385)		(2,177)		(2,446)
Other comprehensive income before reclassifications	[1]	0		0		0		0
Amounts reclassified from accumulated other comprehensive income (2)	[1]	61		61		122		122
Net current-period other comprehensive income	[1]	61		61		122		122
Ending balance		(2,055)		(2,324)		(2,055)		(2,324)
Unrealized gains and losses on cash flow hedge
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance		4,810		0		0		0
Other comprehensive income before reclassifications	[1]	7,233		0		12,043		0
Amounts reclassified from accumulated other comprehensive income (2)	[2]	0		0		0		0
Net current-period other comprehensive income	[1]	7,233		0		12,043		0
Ending balance		$ 12,043		$ 0		$ 12,043		$ 0
Accounting Standards Update 2016-01 [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption										$ 46	$ 0
Accounting Standards Update 2016-01 [Member] | Unrealized Gains and Losses on Available-for-Sale Debt Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption											157
Accounting Standards Update 2016-01 [Member] | Unrealized Gains and Losses on Pension Plan Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption											0
Accounting Standards Update 2016-01 [Member] | Unrealized gains and losses on cash flow hedge
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption											0
Accounting Standards Update 2016-01 [Member] | Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption										$ 0	$ 157
[1]	All amounts are net of tax. Amounts in parenthesis indicate debits.
[2]	(2) See following table for details about these reclassifications.

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Reclassification out of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Investment securities gains, net			$ 2,132	$ (11)
Total before tax	$ 63,818	$ 51,748	120,474	98,533
Income tax provision	(12,094)	(9,999)	(22,879)	(16,814)
Compensation and employee benefits	52,015	48,949	104,100	99,519
Net income	51,724	41,749	97,595	81,719
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains and Losses on Available-for-Sale Debt Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Investment securities gains, net	285	5	2,132	107
Total before tax	285	5	2,132	107
Income tax provision	(66)	(1)	(496)	(25)
Net income	219	4	1,636	82
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains and Losses on Pension Plan Liability [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(80)	(80)	(159)	(160)
Income tax provision	19	19	37	38
Compensation and employee benefits	(80)	(80)	(159)	(160)
Net income	$ (61)	$ (61)	$ (122)	$ (122)

Fair Value Accounting and Mea_3

Fair Value Accounting and Measurement (Financial Assets And Liabilities Accounted for Fair Value On Recurring Basis) (Details) - USD ($)	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Level 1 to level 2 Transfers, Amount	$ 0		$ 0
Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	2,864,418,000	$ 3,167,448,000
Other assets (Interest rate contracts)	17,857,000	7,033,000
Interest Rate Cash Flow Hedge Asset at Fair Value	15,691,000
Other liabilities (Interest rate contracts)	17,858,000	7,033,000
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	249,000	248,000
Other assets (Interest rate contracts)	0	0
Interest Rate Cash Flow Hedge Asset at Fair Value	0
Other liabilities (Interest rate contracts)	0	0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	2,864,169,000	3,167,200,000
Other assets (Interest rate contracts)	17,857,000	7,033,000
Interest Rate Cash Flow Hedge Asset at Fair Value	15,691,000
Other liabilities (Interest rate contracts)	17,858,000	7,033,000
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	0	0
Other assets (Interest rate contracts)	0	0
Interest Rate Cash Flow Hedge Asset at Fair Value	0
Other liabilities (Interest rate contracts)	0	0
U.S. Government Agency and Sponsored Enterprise Mortgage-Back Securities and Collateralized Mortgage Obligations [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	2,139,496,000	2,188,290,000
U.S. Government Agency and Sponsored Enterprise Mortgage-Back Securities and Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	0	0
U.S. Government Agency and Sponsored Enterprise Mortgage-Back Securities and Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	2,139,496,000	2,188,290,000
U.S. Government Agency and Sponsored Enterprise Mortgage-Back Securities and Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	0	0
State and Municipal Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	509,679,000	574,323,000
State and Municipal Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	0	0
State and Municipal Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	509,679,000	574,323,000
State and Municipal Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	0	0
U.S. Government Agency [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	214,994,000	404,587,000
U.S. Government Agency [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	0	0
U.S. Government Agency [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	214,994,000	404,587,000
U.S. Government Agency [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	0	0
US Government Securities [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	249,000	248,000
US Government Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	249,000	248,000
US Government Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	0	0
US Government Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	$ 0	$ 0

Fair Value Accounting and Mea_4

Fair Value Accounting and Measurement (Financial Assets Accounted For Fair Value On Nonrecurring Basis) (Details) - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 4,837	$ 10,792	$ 4,837	$ 10,792
Fair Value, Option, Changes in Fair Value, Gain (Loss)	2,124	(1,032)	2,525	3,398
Assets, Fair Value Disclosure	4,837	10,792	4,837	10,792
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0	0	0
Assets, Fair Value Disclosure	0	0	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0	0	0
Assets, Fair Value Disclosure	0	0	0	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	4,837	10,792	4,837	10,792
Assets, Fair Value Disclosure	4,837	10,792	4,837	10,792
Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	$ 2,124	$ (1,032)	$ 2,525	$ 3,398

Fair Value Accounting and Mea_5

Fair Value Accounting and Measurement (Quantitative Information About Level 3 Fair Value Measurements) (Details)	Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair Value, Level 1 to level 2 Transfers, Amount	$ 0	$ 0
Fair Value, Nonrecurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired loans	4,837,000	10,792,000
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired loans	4,837,000	10,792,000
Collateral Pledged [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired loans	$ 4,837,000	$ 6,933,000
Collateral Pledged [Member] | Valuation, Market Approach [Member] | Impaired Loans [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired Loans, Measurement Input	0	0
Collateral Pledged [Member] | Valuation, Market Approach [Member] | Impaired Loans [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired Loans, Measurement Input	1	0.6281
Collateral Pledged [Member] | Valuation, Market Approach [Member] | Impaired Loans [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired Loans, Measurement Input	0.3567	0.1572
Uncollateralized [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired loans		$ 3,859,000
Uncollateralized [Member] | Valuation, Market Approach [Member] | Impaired Loans [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired Loans, Measurement Input		0.0425
Uncollateralized [Member] | Valuation, Market Approach [Member] | Impaired Loans [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired Loans, Measurement Input		0.0650
Uncollateralized [Member] | Valuation, Market Approach [Member] | Impaired Loans [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired Loans, Measurement Input		0.0612

Fair Value Accounting and Mea_6

Fair Value Accounting and Measurement (Carrying Amounts and Estimated Fair Values of Selected Financial Instruments) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Assets
Interest-earning deposits with banks	$ 34,332	$ 17,407
Debt securities available for sale	2,864,418	3,167,448
Estimate of Fair Value Measurement [Member]
Assets
Cash and due from banks	224,327	260,180
Interest-earning deposits with banks	34,332	17,407
Debt securities available for sale	2,864,418	3,167,448
FHLB stock	29,800	25,960
Loans held for sale	12,189	3,849
Loans	8,745,513	8,316,946
Interest rate contracts	17,857	7,033
Interest Rate Cash Flow Hedge Asset at Fair Value	15,691
Liabilities
Deposits	388,103	407,659
FHLB Advances	396,344	400,085
Repurchase agreements	50,226	61,094
Subordinated Debt Obligations, Fair Value Disclosure	35,397	34,897
Interest rate contracts	17,858	7,033
Reported Value Measurement [Member]
Assets
Cash and due from banks	224,327	260,180
Interest-earning deposits with banks	34,332	17,407
Debt securities available for sale	2,864,418	3,167,448
FHLB stock	29,800	25,960
Loans held for sale	12,189	3,849
Loans	8,566,473	8,308,142
Interest rate contracts	17,857	7,033
Interest Rate Cash Flow Hedge Asset at Fair Value	15,691
Liabilities
Deposits	391,496	414,443
FHLB Advances	495,496	399,523
Repurchase agreements	50,226	61,094
Subordinated Debt Obligations, Fair Value Disclosure	35,370	35,462
Interest rate contracts	17,858	7,033
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member]
Assets
Cash and due from banks	224,327	260,180
Interest-earning deposits with banks	34,332	17,407
Debt securities available for sale	249	248
FHLB stock	0	0
Loans held for sale	0	0
Loans	0	0
Interest rate contracts	0	0
Interest Rate Cash Flow Hedge Asset at Fair Value	0
Liabilities
Deposits	0	0
FHLB Advances	0	0
Repurchase agreements	0	0
Subordinated Debt Obligations, Fair Value Disclosure	0	0
Interest rate contracts	0	0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member]
Assets
Cash and due from banks	0	0
Interest-earning deposits with banks	0	0
Debt securities available for sale	2,864,169	3,167,200
FHLB stock	29,800	25,960
Loans held for sale	12,189	3,849
Loans	0	0
Interest rate contracts	17,857	7,033
Interest Rate Cash Flow Hedge Asset at Fair Value	15,691
Liabilities
Deposits	388,103	407,659
FHLB Advances	396,344	400,085
Repurchase agreements	50,226	61,094
Subordinated Debt Obligations, Fair Value Disclosure	35,397	34,897
Interest rate contracts	17,858	7,033
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member]
Assets
Cash and due from banks	0	0
Interest-earning deposits with banks	0	0
Debt securities available for sale	0	0
FHLB stock	0	0
Loans held for sale	0	0
Loans	8,745,513	8,316,946
Interest rate contracts	0	0
Interest Rate Cash Flow Hedge Asset at Fair Value	0
Liabilities
Deposits	0	0
FHLB Advances	0	0
Repurchase agreements	0	0
Subordinated Debt Obligations, Fair Value Disclosure	0	0
Interest rate contracts	$ 0	$ 0

Earnings per Common Share (Deta

Earnings per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net Income	$ 51,724	$ 41,749	$ 97,595	$ 81,719
Earnings allocated to participating securities - nonvested restricted shares	378	473	838	909
Earnings allocated to common shareholders, Basic	$ 51,346	$ 41,276	$ 96,757	$ 80,810
Weighted average common shares outstanding	72,451	72,385	72,486	72,343
Basic earnings per common share	$ 0.71	$ 0.57	$ 1.33	$ 1.12
Earnings allocated to common shareholders, Diluted	$ 51,346	$ 41,276	$ 96,757	$ 80,810
Dilutive effect of equity awards and warrants	0	5	1	4
Weighted average diluted common shares outstanding	72,451	72,390	72,487	72,347
Diluted earnings per common share	$ 0.71	$ 0.57	$ 1.33	$ 1.12
Potentially dilutive share options that were not included in the computation of diluted EPS because to do so would be anti-dilutive.	0	3	0	7

Revenue from Contracts with C_3

Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue from Contract with Customer [Abstract]
Deposit account and treasury management fees	$ 9,035	$ 8,683	$ 18,015	$ 17,423
Card revenue	3,763	6,616	7,425	12,429
Financial services and trust revenue	3,425	3,219	6,382	5,949
Revenue from contracts with customers	16,223	18,518	31,822	35,801
Noninterest income, excluding revenue from contracts with customers	9,425	5,174	15,522	11,034
Noninterest Income	$ 25,648	$ 23,692	$ 47,344	$ 46,835