Columbia Banking System (COLB) 10-Q 3 May 19 2019 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	Apr. 30, 2019
Document Information [Line Items]
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Entity Registrant Name	COLUMBIA BANKING SYSTEM INC
Trading Symbol	COLB
Amendment Flag	false
Entity Emerging Growth Company	false
Entity Small Business	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Entity Central Index Key	0000887343
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		73,555,751

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) shares in Thousands, $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
ASSETS
Cash and Due from Banks	$ 178,591	$ 260,180
Interest-earning deposits with banks	33,482	17,407
Total cash and cash equivalents	212,073	277,587
Debt securities available for sale at fair value	3,027,270	3,167,448
FHLB stock at cost	25,600	25,960
Loans held for sale	4,017	3,849
Loans, net of unearned income	8,520,798	8,391,511
Less: ALLL	83,274	83,369
Loans, net	8,437,524	8,308,142
Interest receivable	46,835	45,323
Premises and equipment, net	168,139	168,788
OREO	6,075	6,019
Goodwill	765,842	765,842
Other intangible assets, net	43,189	45,937
Other assets	327,872	280,250
Total assets	13,064,436	13,095,145
LIABILITIES AND SHAREHOLDERS' EQUITY
Noninterest-bearing	5,106,568	5,227,216
Interest-bearing	5,262,441	5,230,910
Total deposits	10,369,009	10,458,126
FHLB advances	390,510	399,523
Securities sold under agreements to repurchase	23,018	61,094
Subordinated debentures	35,416	35,462
Other liabilities	157,863	107,291
Total liabilities	10,975,816	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 And Outstanding	73,565	73,249
Common Stock - value	$ 1,642,977	$ 1,642,246
Retained earnings	442,597	426,708
Accumulated other comprehensive income (loss)	3,046	(35,305)
Total shareholders’ equity	2,088,620	2,033,649
Total liabilities and shareholders’ equity	$ 13,064,436	$ 13,095,145

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 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
		Mar. 31, 2019	Mar. 31, 2018
Interest Income
Loans		$ 108,416	$ 103,027
Taxable securities		17,415	12,708
Tax-exempt securities		2,969	3,064
Deposits in banks		88	345
Total interest income		128,888	119,144
Interest Expense
Deposits		4,498	2,509
FHLB advances		2,685	570
Subordinated debentures		468	468
Other borrowings		215	116
Total interest expense		7,866	3,663
Net Interest Income		121,022	115,481
Provision for loan and lease losses		1,362	5,852
Net interest income after provision for loan and lease losses		119,660	109,629
Noninterest Income
Deposit account and treasury management fees		8,980	8,740
Card revenue		3,662	5,813
Financial services and trust revenue		2,957	2,730
Loan revenue		2,389	3,186
Bank owned life insurance		1,519	1,426
Investment securities gain (loss), net		1,847	22
Other		342	1,226
Total noninterest income		21,696	23,143
Noninterest Expense
Compensation and employee benefits		52,085	50,570
Occupancy		8,809	10,121
Data processing		4,669	5,270
Legal and professional fees		4,573	3,237
Amortization of intangibles		2,748	3,188
B&O taxes (1)	[1]	1,876	1,317
Advertising and promotion		974	1,429
Regulatory premiums		984	937
Net cost (benefit) of operation of OREO		113	1
Other (1)	[1]	7,869	9,917
Total noninterest expense		84,700	85,987
Income before income taxes		56,656	46,785
Income tax provision		10,785	6,815
Net Income		$ 45,871	$ 39,970
Earnings per common share
Basic ($ per share)		$ 0.63	$ 0.55
Diluted ($ per share)		$ 0.63	$ 0.55
Weighted average number of common shares outstanding		72,521	72,300
Weighted average number of diluted common shares outstanding		72,524	72,305
[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
		Mar. 31, 2019	Mar. 31, 2018
Net income		$ 45,871	$ 39,970
Unrealized gain (loss) from securities
Net unrealized holding gain (loss) from available for sale debt securities arising during the period, net of tax		32,063	(26,048)
Reclassification adjustment of net (gain) loss from sale of available for sale debt securities included in income, net of tax		1,417	(78)
Net unrealized gain (loss) from securities, net of reclassification adjustment		33,480	(26,126)
Pension plan liability adjustment:
Amortization of unrecognized net actuarial loss included in net periodic pension cost, net of tax		61	61
Pension plan liability adjustment, net		61	61
Unrealized gain (loss) from cash flow hedging instruments
Net unrealized gain (loss) in cash flow hedging instruments arising during the period, net of tax		4,810	0
Net unrealized gain (loss) from cash flow hedging instruments, net of reclassification adjustment		4,810	0
Other Comprehensive Income (Loss)	[1]	38,351	(26,065)
Total comprehensive income		$ 84,222	$ 13,905
[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
	Mar. 31, 2019	Mar. 31, 2018
Net unrealized holding gain (loss) from available for sale securities arising during the period, tax	$ (9,713)	$ 7,891
Reclassification adjustment of net gain from sale of available for sale securities included in income, tax	(430)	24
Less: amortization of unrecognized net actuarial loss included in net periodic pension cost, tax	(19)	(19)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax	$ (1,458)	$ 0

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption | Accounting Standards Update 2016-01 [Member]	$ (46)		$ (203)	$ 157
Balance, shares at Dec. 31, 2017		73,020
Balance, value at Dec. 31, 2017	1,949,922	$ 1,634,705	337,442	(22,225)
Net income	39,970		39,970
Other comprehensive income	(26,065)			(26,065)
Issuance of common stock - stock option and other plans, shares		17
Issuance of common stock - stock option and other plans, value	$ 719	$ 719
Stock Adjustment Deferred Compensation - Shares	0
Stock Adjustment Value Deferred Compensation	$ 3
Issuance of common stock - restricted stock awards, net of cancelled awards, shares		263
Issuance of common stock - restricted stock awards, net of cancelled awards, value	2,064	$ 2,064
Stock Repurchased During Period, Shares		(60)
Stock Repurchased and Retired During Period, Value	(2,575)	$ (2,575)
Cash dividends paid on common stock	(16,069)		(16,069)
Balance, shares at Mar. 31, 2018		73,240
Balance, value at Mar. 31, 2018	1,947,923	$ 1,634,916	361,140	(48,133)
Cumulative Effect of New Accounting Principle in Period of Adoption | Accounting Standards Update 2016-02 [Member]			782
Balance, shares at Dec. 31, 2018		73,249
Balance, value at Dec. 31, 2018	2,033,649	$ 1,642,246	426,708	(35,305)
Net income	45,871		45,871
Other comprehensive income	38,351			38,351
Issuance of common stock - stock option and other plans, shares		25
Issuance of common stock - stock option and other plans, value	878	$ 878
Issuance of common stock - restricted stock awards, net of cancelled awards, shares		355
Issuance of common stock - restricted stock awards, net of cancelled awards, value	2,285	$ 2,285
Stock Repurchased During Period, Shares		(64)
Stock Repurchased and Retired During Period, Value	(2,432)	$ (2,432)
Cash dividends paid on common stock	(30,764)		(30,764)
Balance, shares at Mar. 31, 2019		73,565
Balance, value at Mar. 31, 2019	$ 2,088,620	$ 1,642,977	$ 442,597	$ 3,046

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Common Stock, Dividends, Per Share, Cash Paid	$ 0.42	$ 0.22

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash Flows From Operating Activities
Net income	$ 45,871	$ 39,970
Adjustments to reconcile net income to net cash provided by operating activities
Provision for loan and lease losses	1,362	5,852
Stock-based compensation expense	2,285	2,064
Depreciation, amortization and accretion	8,182	7,618
Investment securities gains, net	1,847	22
Net realized (gain) loss on sale of premises and equipment and loans held for investment	(1)	630
Net realized loss on sale and valuation adjustments of OREO	(209)	(135)
Originations of loans held for sale	21,542	27,553
Proceeds from sales of loans held for sale	21,374	29,007
Net change in:
Interest receivable	(1,512)	(914)
Interest payable	1,154	452
Other assets	(5,244)	2,530
Other liabilities	2,179	(15,014)
Net cash provided by operating activities	52,472	43,495
Cash Flows From Investing Activities
Loans originated, net of principal collected	(80,407)	17,688
Purchases of debt securities available for sale	(3,710)	(27,497)
Payments to Acquire Loans Held-for-investment	(49,039)	0
Purchases of premises and equipment	(1,788)	(2,099)
Payments to Acquire Federal Home Loan Bank Stock	(57,280)	(45,080)
Proceeds from sales of debt securities available for sale	83,968	19,761
Proceeds from principal repayments and maturities of debt securities available for sale	100,876	82,643
Proceeds from Sales of Assets, Investing Activities	11	3,721
Proceeds from redemption of Federal Home Loan Bank Stock	57,640	43,880
Proceeds from sales of other real estate and other personal property owned	150	2,062
Net cash provided by investing activities	50,421	95,079
Cash Flows From Financing Activities
Net decrease in deposits	(89,027)	(136,466)
Net decrease in sweep repurchase agreements (1)	(38,076)	(29,812)	[1]
Proceeds from Federal Home Loan Bank advances	1,432,000	1,127,000
Proceeds from exercise of stock options	878	719
Repayment of Federal Home Loan Bank advances	(1,441,000)	(1,097,000)
Payment of common stock dividends	(30,750)	(16,069)
Repayments of junior subordinated debt	0	8,248
Repayment of term repurchase agreement	0	(25,000)	[1]
Purchase and retirement of common stock	2,432	2,575
Net cash used in financing activities	(168,407)	(187,451)
Decrease in cash and cash equivalents	(65,514)	(48,877)
Cash and cash equivalents at beginning of period	277,587	342,533
Cash and cash equivalents at end of period	212,073	293,656
Supplemental Information:
Cash paid for interest	6,712	3,211
Cash paid for income tax	(146)	24
Non-cash investing and financing activities
Loans transferred to other real estate owned	386	406
Premises and equipment expenditures incurred but not yet paid	35	0
Change in dividends payable on unvested shares	$ 14	$ 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 three months ended March 31, 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	3 Months Ended
	Mar. 31, 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 three months ended March 31, 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

Accounting Pronouncements Recen

Accounting Pronouncements Recently Issued	3 Months Ended
	Mar. 31, 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 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.

Securities

Securities	3 Months Ended
	Mar. 31, 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 March 31, 2019 (in thousands) U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 2,156,810 $ 24,904 $ (26,100 ) $ 2,155,614 State and municipal securities 534,218 4,833 (2,561 ) 536,490 U.S. government agency and government-sponsored enterprise securities 335,536 1,321 (1,940 ) 334,917 U.S. government securities 251 — (2 ) 249 Total $ 3,026,815 $ 31,058 $ (30,603 ) $ 3,027,270 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 March 31, 2019 2018 (in thousands) Proceeds from sales of debt securities available for sale $ 83,968 $ 19,761 Gross realized gains from sales of debt securities available for sale $ 1,847 $ 148 Gross realized losses from sales of debt securities available for sale — (46 ) Other securities losses, net (1) — (80 ) Investment securities gains, net $ 1,847 $ 22 __________ (1) Other securities losses, net includes net unrealized loss activity associated with equity securities for the period ended March 31, 2018 . There were no sales of equity securities during the periods presented. The scheduled contractual maturities of debt securities available for sale at March 31, 2019 are presented as follows: March 31, 2019 Amortized Cost Fair Value (in thousands) Due within one year $ 111,449 $ 111,405 Due after one year through five years 528,884 526,821 Due after five years through ten years 1,324,754 1,341,174 Due after ten years 1,061,728 1,047,870 Total debt securities available for sale $ 3,026,815 $ 3,027,270 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: March 31, 2019 (in thousands) Washington and Oregon State to secure public deposits $ 277,815 FRB to secure borrowings 54,717 Other securities pledged 140,755 Total securities pledged as collateral $ 473,287 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 March 31, 2019 and December 31, 2018 : Less than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized March 31, 2019 (in thousands) U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 1,879 $ (7 ) $ 1,250,289 $ (26,093 ) $ 1,252,168 $ (26,100 ) State and municipal securities 3,312 (1 ) 209,604 (2,560 ) 212,916 (2,561 ) U.S. government agency and government-sponsored enterprise securities — — 253,752 (1,940 ) 253,752 (1,940 ) U.S. government securities — — 248 (2 ) 248 (2 ) Total $ 5,191 $ (8 ) $ 1,713,893 $ (30,595 ) $ 1,719,084 $ (30,603 ) 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 March 31, 2019 , there were 407 U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations securities in an unrealized loss position, of which 401 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 March 31, 2019 . At March 31, 2019 , there were 246 state and municipal government securities in an unrealized loss position, of which 243 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 March 31, 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 March 31, 2019 . At March 31, 2019 , there were 36 U.S. government agency and government-sponsored enterprise securities in an unrealized loss position, all of which 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 March 31, 2019 . At March 31, 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 March 31, 2019

Loans

Loans	3 Months Ended
	Mar. 31, 2019
Loans Receivable, Net [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): March 31, 2019 December 31, 2018 Loans, excluding PCI loans PCI Loans Total Loans, excluding PCI loans PCI Loans Total (in thousands) Commercial business $ 3,509,472 $ 9,914 $ 3,519,386 $ 3,438,422 $ 9,240 $ 3,447,662 Real estate: One-to-four family residential 282,673 7,494 290,167 238,367 8,017 246,384 Commercial and multifamily residential 3,917,833 61,661 3,979,494 3,846,027 62,910 3,908,937 Total real estate 4,200,506 69,155 4,269,661 4,084,394 70,927 4,155,321 Real estate construction: One-to-four family residential 207,900 147 208,047 217,790 153 217,943 Commercial and multifamily residential 240,458 519 240,977 284,394 534 284,928 Total real estate construction 448,358 666 449,024 502,184 687 502,871 Consumer 312,886 8,522 321,408 318,945 8,906 327,851 Less: Net unearned income (38,681 ) — (38,681 ) (42,194 ) — (42,194 ) Total loans, net of unearned income 8,432,541 88,257 8,520,798 8,301,751 89,760 8,391,511 Less: ALLL (80,029 ) (3,245 ) (83,274 ) (79,758 ) (3,611 ) (83,369 ) Total loans, net $ 8,352,512 $ 85,012 $ 8,437,524 $ 8,221,993 $ 86,149 $ 8,308,142 Loans held for sale $ 4,017 $ — $ 4,017 $ 3,849 $ — $ 3,849 At March 31, 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. The Company has made loans to executive officers and directors of the Company and related interests. These loans are made on the same terms, including interest rates and collateral, as those prevailing at the time for comparable transactions with unrelated persons and do not involve more than the normal risk of collectability. The aggregate dollar amount of these loans was $9.5 million and $9.6 million at March 31, 2019 and December 31, 2018 , respectively. During the first three months of 2019 , there were no advances and $99 thousand in repayments. At March 31, 2019 and December 31, 2018 , $3.24 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 $86.1 million and $82.0 million of commercial loans to the FRB for additional borrowing capacity at March 31, 2019 and December 31, 2018 , respectively. The following is an analysis of nonaccrual loans as of March 31, 2019 and December 31, 2018 : March 31, 2019 December 31, 2018 Recorded Unpaid Principal Recorded Unpaid Principal (in thousands) Commercial business: Secured $ 35,577 $ 46,496 $ 35,504 $ 45,072 Unsecured — — 9 9 Real estate: One-to-four family residential 923 1,018 1,158 1,178 Commercial & multifamily residential: Commercial land 2,570 2,577 2,261 2,270 Income property 1,108 1,118 2,721 3,062 Owner occupied 9,623 9,960 9,922 10,300 Real estate construction: One-to-four family residential: Land and acquisition — — 318 318 Consumer 2,814 3,062 2,949 3,149 Total $ 52,615 $ 64,231 $ 54,842 $ 65,358 Loans, excluding PCI loans The following is an aging of the recorded investment of the loan portfolio as of March 31, 2019 and December 31, 2018 : Current 30 - 59 60 - 89 Greater Total Nonaccrual Total Loans March 31, 2019 (in thousands) Commercial business: Secured $ 3,337,206 $ 6,848 $ 1,603 $ — $ 8,451 $ 35,577 $ 3,381,234 Unsecured 114,087 32 1,098 — 1,130 — 115,217 Real estate: One-to-four family residential 280,727 680 — — 680 923 282,330 Commercial & multifamily residential: Commercial land 292,125 225 — — 225 2,570 294,920 Income property 1,959,361 2,140 — — 2,140 1,108 1,962,609 Owner occupied 1,627,738 1,123 75 — 1,198 9,623 1,638,559 Real estate construction: One-to-four family residential: Land and acquisition 3,619 — — — — — 3,619 Residential construction 203,318 — — — — — 203,318 Commercial & multifamily residential: Income property 163,674 — — — — — 163,674 Owner occupied 74,736 — — — — — 74,736 Consumer 308,069 1,234 208 — 1,442 2,814 312,325 Total $ 8,364,660 $ 12,282 $ 2,984 $ — $ 15,266 $ 52,615 $ 8,432,541 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 March 31, 2019 and December 31, 2018 : Recorded Investment Recorded Investment Impaired Loans With Impaired Loans Without Recorded Unpaid Related Recorded Unpaid March 31, 2019 (in thousands) Commercial business: Secured $ 3,351,027 $ 30,207 $ 5,426 $ 6,189 $ 2,829 $ 24,781 $ 30,656 Unsecured 115,199 18 — — — 18 18 Real estate: One-to-four family residential 281,466 864 313 793 8 551 568 Commercial & multifamily residential: Commercial land 292,055 2,865 — — — 2,865 2,909 Income property 1,961,287 1,322 — — — 1,322 1,333 Owner occupied 1,622,007 16,552 3,181 4,640 52 13,371 13,617 Real estate construction: One-to-four family residential: Land and acquisition 3,619 — — — — — — Residential construction 203,318 — — — — — — Commercial & multifamily residential: Income property 163,674 — — — — — — Owner occupied 74,736 — — — — — — Consumer 308,870 3,455 2,558 2,703 22 897 1,012 Total $ 8,377,258 $ 55,283 $ 11,478 $ 14,325 $ 2,911 $ 43,805 $ 50,113 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 month periods indicated: Three Months Ended March 31, 2019 2018 Average Recorded Interest Recognized Average Recorded Interest Recognized (in thousands) Commercial business: Secured $ 28,246 $ 12 $ 42,306 $ 12 Unsecured 19 — 24 — Real estate: One-to-four family residential 876 6 881 7 Commercial & multifamily residential: Commercial land 2,546 7 2,569 — Income property 2,138 19 4,292 31 Owner occupied 14,630 118 8,622 84 Real estate construction: One-to-four family residential: Residential construction — — 1,210 — Commercial & multifamily residential: Owner occupied — — 4,050 51 Consumer 3,738 27 6,623 54 Total $ 52,193 $ 189 $ 70,577 $ 239 The following is an analysis of loans classified as TDR during the three months ended March 31, 2019 and 2018 : Three months ended March 31, 2019 Three months ended March 31, 2018 Number of TDR Modifications Pre-Modification Post-Modification Number of TDR Modifications Pre-Modification Post-Modification (dollars in thousands) Commercial business: Secured 2 $ 616 $ 616 1 $ 450 $ 450 Real estate: Commercial and multifamily residential: Income property 1 217 217 — — — Commercial and multifamily residential: Income property — — — 1 891 891 Consumer — — — 7 1,143 1,143 Total 3 $ 833 $ 833 9 $ 2,484 $ 2,484 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 $1.3 million of additional funds on loans classified as TDR as of March 31, 2019 . The Company had $2.1 million of such commitments at December 31, 2018 . During the three months ended March 31, 2019 , the Company had one $26 thousand consumer loan that defaulted within 12 months of being modified as a TDR. 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 months ended March 31, 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 March 31, 2019 and December 31, 2018 : March 31, 2019 December 31, 2018 (in thousands) Commercial business $ 10,270 $ 9,672 Real estate: One-to-four family residential 9,258 9,848 Commercial and multifamily residential 64,958 66,340 Total real estate 74,216 76,188 Real estate construction: One-to-four family residential 147 153 Commercial and multifamily residential 491 507 Total real estate construction 638 660 Consumer 9,294 9,765 Subtotal of PCI loans 94,418 96,285 Less: Valuation discount resulting from acquisition accounting 6,161 6,525 ALLL 3,245 3,611 PCI loans, net of valuation discounts and allowance for loan losses $ 85,012 $ 86,149 The following table shows the changes in accretable yield for PCI loans for the three months ended March 31, 2019 and 2018 : Three Months Ended March 31, 2019 2018 (in thousands) Balance at beginning of period $ 21,949 $ 31,176 Accretion (1,577 ) (2,265 ) Disposals 103 (159 ) Reclassifications from nonaccretable difference 1,374 603 Balance at end of period $ 21,849 $ 29,355

Allowance for Loan and Lease Lo

Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit	3 Months Ended
	Mar. 31, 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 three months ended March 31, 2019 and 2018 . The following tables show a detailed analysis of the ALLL for the three months ended March 31, 2019 and 2018 : Beginning Charge-offs Recoveries Provision (Recapture) Ending Specific General Three months ended March 31, 2019 (in thousands) Commercial business: Secured $ 43,188 $ (1,249 ) $ 323 $ 1,355 $ 43,617 $ 2,829 $ 40,788 Unsecured 2,626 — 157 (288 ) 2,495 — 2,495 Real estate: One-to-four family residential 593 (2 ) 17 8 616 8 608 Commercial & multifamily residential: Commercial land 3,947 — 7 634 4,588 — 4,588 Income property 4,044 — 23 951 5,018 — 5,018 Owner occupied 4,533 — 1 432 4,966 52 4,914 Real estate construction: One-to-four family residential: Land and acquisition 549 — 59 (201 ) 407 — 407 Residential construction 5,536 (170 ) 1 99 5,466 — 5,466 Commercial & multifamily residential: Income property 5,784 — — (1,267 ) 4,517 — 4,517 Owner occupied 2,604 — — (384 ) 2,220 — 2,220 Consumer 5,301 (478 ) 238 484 5,545 22 5,523 PCI 3,611 (1,089 ) 705 18 3,245 — 3,245 Unallocated 1,053 — — (479 ) 574 — 574 Total $ 83,369 $ (2,988 ) $ 1,531 $ 1,362 $ 83,274 $ 2,911 $ 80,363 Beginning Charge-offs Recoveries Provision (Recapture) Ending Specific General Three months ended March 31, 2018 (in thousands) Commercial business: Secured $ 29,341 $ (2,414 ) $ 553 $ 9,851 $ 37,331 $ 5,657 $ 31,674 Unsecured 2,000 (63 ) 249 409 2,595 2 2,593 Real estate: One-to-four family residential 701 — 172 (315 ) 558 22 536 Commercial & multifamily residential: Commercial land 4,265 — 6 (526 ) 3,745 — 3,745 Income property 5,672 (223 ) 141 (888 ) 4,702 — 4,702 Owner occupied 5,459 — 12 (722 ) 4,749 5 4,744 Real estate construction: One-to-four family residential: Land and acquisition 963 — 16 (67 ) 912 — 912 Residential construction 3,709 — 3 924 4,636 — 4,636 Commercial & multifamily residential: Income property 7,053 — — 421 7,474 — 7,474 Owner occupied 4,413 — — (2,490 ) 1,923 — 1,923 Consumer 5,163 (264 ) 260 57 5,216 171 5,045 PCI 6,907 (1,343 ) 1,224 (1,123 ) 5,665 — 5,665 Unallocated — — — 321 321 — 321 Total $ 75,646 $ (4,307 ) $ 2,636 $ 5,852 $ 79,827 $ 5,857 $ 73,970 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 March 31, 2019 2018 (in thousands) Balance at beginning of period $ 4,330 $ 3,130 Net changes in the allowance for unfunded commitments and letters of credit (550 ) 1,200 Balance at end of period $ 3,780 $ 4,330 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 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 March 31, 2019 and December 31, 2018 : Pass Special Mention Substandard Doubtful Loss Total March 31, 2019 (in thousands) Loans, excluding PCI loans: Commercial business: Secured $ 3,217,555 $ 58,919 $ 104,760 $ — $ — $ 3,381,234 Unsecured 115,089 26 102 — — 115,217 Real estate: One-to-four family residential 281,107 — 1,223 — — 282,330 Commercial and multifamily residential: Commercial land 286,993 2,472 5,455 — — 294,920 Income property 1,918,999 1,560 42,050 — — 1,962,609 Owner occupied 1,578,780 13,724 46,055 — — 1,638,559 Real estate construction: One-to-four family residential: Land and acquisition 3,619 — — — — 3,619 Residential construction 203,318 — — — — 203,318 Commercial and multifamily residential: Income property 163,674 — — — — 163,674 Owner occupied 74,148 — 588 — — 74,736 Consumer 307,950 — 4,375 — — 312,325 Total $ 8,151,232 $ 76,701 $ 204,608 $ — $ — 8,432,541 Less: ALLL 80,029 Loans, excluding PCI loans, net $ 8,352,512 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 March 31, 2019 and December 31, 2018 : Pass Special Mention Substandard Doubtful Loss Total March 31, 2019 (in thousands) PCI loans: Commercial business: Secured $ 8,749 $ — $ 804 $ — $ — $ 9,553 Unsecured 717 — — — — 717 Real estate: One-to-four family residential 8,565 — 693 — — 9,258 Commercial and multifamily residential: Commercial land 9,974 141 71 — — 10,186 Income property 19,350 — — — — 19,350 Owner occupied 28,662 — 6,760 — — 35,422 Real estate construction: One-to-four family residential: Land and acquisition 146 — 1 — — 147 Commercial and multifamily residential: Income property 491 — — — — 491 Consumer 8,908 — 386 — — 9,294 Total $ 85,562 $ 141 $ 8,715 $ — $ — 94,418 Less: Valuation discount resulting from acquisition accounting 6,161 ALLL 3,245 PCI loans, net $ 85,012 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	3 Months Ended
	Mar. 31, 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 months ended March 31, 2019 and 2018 : Three Months Ended March 31, 2019 2018 (in thousands) Balance, beginning of period $ 6,019 $ 13,298 Transfers in 386 406 Valuation adjustments (195 ) (92 ) Proceeds from sale of OREO property (121 ) (2,062 ) Loss on sale of OREO, net (14 ) (43 ) Balance, end of period $ 6,075 $ 11,507 At March 31, 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 $678 thousand

Goodwill and Intangible Assets

Goodwill and Intangible Assets	3 Months Ended
	Mar. 31, 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 March 31, 2019 2018 (in thousands) Goodwill Total goodwill $ 765,842 $ 765,842 Other intangible assets, net CDI: Gross CDI balance at beginning of period 105,473 105,473 Accumulated amortization at beginning of period (60,455 ) (48,219 ) CDI, net at beginning of period 45,018 57,254 CDI current period amortization (2,748 ) (3,188 ) Total CDI, net at end of period 42,270 54,066 Intangible assets not subject to amortization 919 919 Other intangible assets, net at end of period 43,189 54,985 Total goodwill and other intangible assets at end of period $ 809,031 $ 820,827 The following table provides the estimated future amortization expense of our CDI for the remaining nine months ending December 31, 2019 and the succeeding four years: Year ending December 31, (in thousands) 2019 $ 7,731 2020 8,724 2021 7,264 2022 5,880 2023 4,552

Subordinated debentures

Subordinated debentures	3 Months Ended
	Mar. 31, 2019
Subordinated Borrowing [Line Items]
Subordinated Borrowings Disclosure [Text Block]	Subordinated Debentures On November 1, 2017, with its acquisition of Pacific Continental, the Company assumed $35.0 million in aggregate principal amount of fixed-to-floating rate subordinated debentures. These debentures are callable at par on June 30, 2021, have a stated maturity of June 30, 2026 and bear interest at a fixed annual rate of 5.875% per year, from and including June 27, 2016, but excluding June 30, 2021. From and including June 30, 2021 through the maturity date or early redemption date, the interest rate will reset quarterly to an annual interest rate equal to the then-current three-month LIBOR rate plus 4.715%

Junior subordinated debt

Junior subordinated debt	3 Months Ended
	Mar. 31, 2019
Junior subordinated debt [Abstract]
Junior subordinated debentures [Text Block]	Junior Subordinated Debentures On November 1, 2017, with its acquisition of Pacific Continental, the Company assumed $14.4 million of trust preferred obligations. The Company redeemed $6.2 million of these obligations during 2017. The remaining $8.2 million

Derivatives and Balance Sheet O

Derivatives and Balance Sheet Offsetting	3 Months Ended
	Mar. 31, 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 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 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 no additional amounts reclassified as a decrease 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 March 31, 2019 and December 31, 2018 was $369.8 million and $366.7 million , respectively. During the three months ended March 31, 2019 , there was no mark-to-market gain or loss recorded to “Other” noninterest expense. During the three months ended March 31, 2018 , a mark-to-market gain of $6 thousand was recorded to “Other” noninterest expense. The following table presents the fair value of derivatives, as well as their classification on the Balance Sheet at March 31, 2019 and December 31, 2018 : Asset Derivatives Liability Derivatives March 31, 2019 December 31, 2018 March 31, 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 $ 6,268 Other assets $ — Other liabilities $ — Other liabilities $ — Derivatives not designated as hedging instruments: Interest rate swap contracts Other assets $ 8,815 Other assets $ 7,033 Other liabilities $ 8,815 Other liabilities $ 7,033 The table below presents the effect of cash flow hedge accounting on Accumulated Other Comprehensive Income at March 31, 2019 and December 31, 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 March 31, Three Months Ended March 31, 2019 2018 2019 2018 (in thousands) Interest rate collar $ 6,268 $ — Interest income $ — $ — The notional amount of the interest rate collar was $500.0 million at March 31, 2019 . We recorded no income statement impact for the interest rate collar for the three months ended March 31, 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 Posted Net Amount March 31, 2019 (in thousands) Assets Interest rate swap contracts $ 8,815 $ — $ 8,815 $ — $ 8,815 Interest rate collar $ 6,268 $ — $ 6,268 $ — 6,268 Liabilities Interest rate swap contracts $ 8,815 $ — $ 8,815 $ (5,573 ) $ 3,242 Repurchase agreements $ 23,018 $ — $ 23,018 $ (23,018 ) $ — 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 March 31, 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 $ 23,018 $ — $ — $ — $ 23,018 Gross amount of recognized liabilities for repurchase agreements 23,018 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 $23.0 million

Commitments and Contingent Liab

Commitments and Contingent Liabilities	3 Months Ended
	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Text Block]	Commitments and Contingent Liabilities Lease Commitments: 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 March 31, 2019 (in thousands) Operating lease asset Other assets $ 48,211 Operating lease liability Other liabilities $ 54,246 At March 31, 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 $2.8 million for the three months ended March 31, 2019 . Right-of-use assets obtained in exchange for new operating lease liabilities during the three months ended March 31, 2019 were $1.4 million . The following table shows the components of net lease costs: Three Months Ended March 31, Item Statement of Income Location 2019 (in thousands) Operating lease cost Occupancy $ 2,820 Variable lease cost Occupancy 506 Sublease income Occupancy (315 ) Net lease cost $ 3,011 The following table shows future minimum payments for operating leases for the remaining nine months of 2019 and subsequent years: Year ending December 31, (in thousands) 2019 $ 8,297 2020 9,920 2021 8,883 2022 8,256 2023 6,949 Thereafter 19,561 Total future minimum lease payments 61,866 Amounts representing interest (7,620 ) Present value of minimum lease payments $ 54,246 Future minimum lease payments for the Company’s operating leases as of December 31, 2018 , prior to the adoption of 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 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 March 31, 2019 and December 31, 2018 , the Company’s loan commitments amounted to $2.66 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 $27.6 million and $28.3 million at March 31, 2019 and December 31, 2018 , respectively. In addition, there were no commitments under commercial letters of credit used to facilitate customers’ trade transactions and other off-balance sheet liabilities at March 31, 2019 and December 31, 2018 , respectively. Legal Proceedings:

Shareholders' Equity

Shareholders' Equity	3 Months Ended
	Mar. 31, 2019
Stockholders' Equity Note [Abstract]
Shareholders' Equity	Shareholders’ Equity Dividends: The following table summarizes year-to-date dividend activity as of March 31, 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 Subsequent to quarter end, on April 25, 2019 , the Company declared a regular quarterly cash dividend of $0.28 per common share and a special cash dividend of $0.14 per common share payable on May 22, 2019 to shareholders of record at the close of business on May 8, 2019 .

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	3 Months Ended
	Mar. 31, 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 month periods ended March 31, 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 March 31, 2019 (in thousands) Beginning balance $ (33,128 ) $ (2,177 ) $ — $ (35,305 ) Other comprehensive income before reclassifications 32,063 — 4,810 36,873 Amounts reclassified from accumulated other comprehensive loss (2) 1,417 61 — 1,478 Net current-period other comprehensive income 33,480 61 4,810 38,351 Ending balance $ 352 $ (2,116 ) $ 4,810 $ 3,046 Three months ended March 31, 2018 Beginning balance $ (19,779 ) $ (2,446 ) $ — $ (22,225 ) Adjustment pursuant to adoption of ASU 2016-01 157 — — 157 Other comprehensive loss before reclassifications (26,048 ) — — (26,048 ) Amounts reclassified from accumulated other comprehensive loss (2) (78 ) 61 — (17 ) Net current-period other comprehensive income (loss) (26,126 ) 61 — (26,065 ) Ending balance $ (45,748 ) $ (2,385 ) $ — $ (48,133 ) __________ (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 month periods ended March 31, 2019 and 2018 : Amount Reclassified from Accumulated Other Comprehensive Income (Loss) Three Months Ended March 31, Affected line Item in the Consolidated 2019 2018 Statement of Income (in thousands) Unrealized gains and losses on available for sale debt securities Investment securities (gains) losses, net $ (1,847 ) $ 102 Investment securities gains, net (1,847 ) 102 Total before tax 430 (24 ) Income tax provision $ (1,417 ) $ 78 Net of tax Amortization of pension plan liability Actuarial losses $ (80 ) $ (80 ) Compensation and employee benefits (80 ) (80 ) Total before tax 19 19 Income tax provision $ (61 ) $ (61 ) Net of tax

Fair Value Accounting and Measu

Fair Value Accounting and Measurement	3 Months Ended
	Mar. 31, 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 March 31, 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 March 31, 2019 (in thousands) Assets Debt securities available for sale: U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations $ 2,155,614 $ — $ 2,155,614 $ — State and municipal debt securities 536,490 — 536,490 — U.S. government agency and government-sponsored enterprise securities 334,917 — 334,917 — U.S. government securities 249 249 — — Total debt securities available for sale $ 3,027,270 $ 249 $ 3,027,021 $ — Other assets: Interest rate contracts $ 8,815 $ — $ 8,815 $ — Interest rate collar 6,268 — 6,268 — Liabilities Other liabilities: Interest rate contracts $ 8,815 $ — $ 8,815 $ — 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 three month periods ended March 31, 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 and OREO. The following methods were used to estimate the fair value of each such class of financial instrument: 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. OREO —OREO is real property that the Bank has taken ownership of in partial or full satisfaction of a loan or loans. OREO is generally measured based on the property’s fair market value as indicated by an appraisal or a letter of intent to purchase. OREO is initially recorded at the fair value less estimated costs to sell. This amount becomes the property’s new basis. Any fair value adjustments based on the property’s fair value less estimated costs to sell at the date of acquisition are charged to the allowance, or in the event of a write-up without previous losses charged to the allowance, a credit to earnings is recorded. Management periodically reviews OREO in an effort to ensure the property is recorded at its fair value, net of estimated costs to sell. Any fair value adjustments subsequent to acquisition are charged or credited to earnings. The initial and subsequent evaluations are performed by officers in the Special Credits group, which reports to the Chief Credit Officer. The REASD obtains appraisals from third-parties for OREO and performs 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 Fair Value Measurements at Reporting Date Using Losses During the Three Months Ended Level 1 Level 2 Level 3 (in thousands) Impaired loans $ 3,840 $ — $ — $ 3,840 $ 2,597 OREO 530 — — 530 195 $ 4,370 $ — $ — $ 4,370 $ 2,792 Fair Value at March 31, 2018 Fair Value Measurements at Reporting Date Using Losses During the Three Months Ended Level 1 Level 2 Level 3 (in thousands) Impaired loans $ 7,820 $ — $ — $ 7,820 $ 5,058 OREO 160 — — 160 51 $ 7,980 $ — $ — $ 7,980 $ 5,109 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. The losses on OREO disclosed above represent the write-downs taken at foreclosure that were charged to the ALLL, as well as subsequent changes in any valuation allowances from updated appraisals that were recorded to earnings. 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 Valuation Technique Unobservable Input Range (Weighted Average) (1) (dollars in thousands) Impaired loans - collateral-dependent (3) $ 3,840 Fair Market Value of Collateral Adjustment to Stated Value 0.00% - 100.00% (44.53%) OREO $ 530 Fair Market Value of Collateral Adjustment to Appraisal Value N/A (2) __________ (1) Discount applied to appraisal value or stated value (in the case of accounts receivable, fixed assets, and inventory). (2) Quantitative disclosures are not provided for OREO because there were no adjustments made to the appraisal values during the current period. (3) Collateral consists of accounts receivable, fixed assets, inventory, real estate and state guarantee. Fair Value at March 31, 2018 Valuation Technique Unobservable Input Range (Weighted Average) (1) (dollars in thousands) Impaired loans - collateral-dependent (3) $ 7,512 Fair Market Value of Collateral Adjustment to Stated Value 0.00% - 100.00% (41.33%) Impaired loans - other (4) $ 308 Discounted Cash Flow Discount Rate 6.00% OREO $ 160 Fair Market Value of Collateral Adjustment to Appraisal Value N/A (2) __________ (1) Discount rate applied to discounted cash flow valuation or appraisal value and stated value (in the case of accounts receivable, fixed assets, and inventory). (2) Quantitative disclosures are not provided for OREO because there were no adjustments made to the appraisal values during the current period. (3) Collateral consists of accounts receivable, fixed assets, inventory and real estate. (4) As there was only one impaired loan remeasured using discounted cash flows, a range of discounts could not be provided. The following tables summarize carrying amounts and estimated fair values of selected financial instruments by level within the fair value hierarchy at March 31, 2019 and December 31, 2018 : March 31, 2019 Carrying Fair Level 1 Level 2 Level 3 (in thousands) Assets Cash and due from banks $ 178,591 $ 178,591 $ 178,591 $ — $ — Interest-earning deposits with banks 33,482 33,482 33,482 — — Debt securities available for sale 3,027,270 3,027,270 249 3,027,021 — FHLB stock 25,600 25,960 — 25,960 — Loans held for sale 4,017 4,017 — 4,017 — Loans 8,437,524 8,541,649 — — 8,541,649 Interest rate contracts 8,815 8,815 — 8,815 — Interest rate collar 6,268 6,268 — 6,268 — Liabilities Time deposits $ 411,945 $ 406,652 $ — $ 406,652 $ — FHLB advances 390,510 390,988 — 390,988 — Repurchase agreements 23,018 23,018 — 23,018 — Subordinated debentures 35,416 36,053 — 36,053 — Interest rate contracts 8,815 8,815 — 8,815 — 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	3 Months Ended
	Mar. 31, 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 and preferred shares which qualify as participating securities. The following table sets forth the computation of basic and diluted EPS for the three months ended March 31, 2019 and 2018 : Three Months Ended March 31, 2019 2018 (in thousands except per share amounts) Basic EPS: Net income $ 45,871 $ 39,970 Less: Earnings allocated to participating securities: Nonvested restricted shares 456 437 Earnings allocated to common shareholders $ 45,415 $ 39,533 Weighted average common shares outstanding 72,521 72,300 Basic earnings per common share $ 0.63 $ 0.55 Diluted EPS: Earnings allocated to common shareholders $ 45,415 $ 39,533 Weighted average common shares outstanding 72,521 72,300 Dilutive effect of equity awards 3 5 Weighted average diluted common shares outstanding 72,524 72,305 Diluted earnings per common share $ 0.63 $ 0.55 Potentially dilutive share options that were not included in the computation of diluted EPS because to do so would be anti-dilutive — 12

Revenue from Contracts with Cus

Revenue from Contracts with Customers	3 Months Ended
	Mar. 31, 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 month periods ended March 31, 2019 and 2018 : Three Months Ended March 31, 2019 2018 (in thousands) Noninterest income: Revenue from contracts with customers: Deposit account and treasury management fees $ 8,980 $ 8,740 Card revenue 3,662 5,813 Financial services and trust revenue 2,957 2,730 Total revenue from contracts with customers 15,599 17,283 Other sources of noninterest income 6,097 5,860 Total noninterest income $ 21,696 $ 23,143

Securities (Tables)

Securities (Tables)	3 Months Ended
	Mar. 31, 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 March 31, 2019 (in thousands) U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 2,156,810 $ 24,904 $ (26,100 ) $ 2,155,614 State and municipal securities 534,218 4,833 (2,561 ) 536,490 U.S. government agency and government-sponsored enterprise securities 335,536 1,321 (1,940 ) 334,917 U.S. government securities 251 — (2 ) 249 Total $ 3,026,815 $ 31,058 $ (30,603 ) $ 3,027,270 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 March 31, 2019 2018 (in thousands) Proceeds from sales of debt securities available for sale $ 83,968 $ 19,761 Gross realized gains from sales of debt securities available for sale $ 1,847 $ 148 Gross realized losses from sales of debt securities available for sale — (46 ) Other securities losses, net (1) — (80 ) Investment securities gains, net $ 1,847 $ 22 __________ (1) Other securities losses, net includes net unrealized loss activity associated with equity securities for the period ended March 31, 2018
Schedule of Contractual Maturities of Investment Securities Available for Sale	The scheduled contractual maturities of debt securities available for sale at March 31, 2019 are presented as follows: March 31, 2019 Amortized Cost Fair Value (in thousands) Due within one year $ 111,449 $ 111,405 Due after one year through five years 528,884 526,821 Due after five years through ten years 1,324,754 1,341,174 Due after ten years 1,061,728 1,047,870 Total debt securities available for sale $ 3,026,815 $ 3,027,270
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: March 31, 2019 (in thousands) Washington and Oregon State to secure public deposits $ 277,815 FRB to secure borrowings 54,717 Other securities pledged 140,755 Total securities pledged as collateral $ 473,287
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 March 31, 2019 and December 31, 2018 : Less than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized March 31, 2019 (in thousands) U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations $ 1,879 $ (7 ) $ 1,250,289 $ (26,093 ) $ 1,252,168 $ (26,100 ) State and municipal securities 3,312 (1 ) 209,604 (2,560 ) 212,916 (2,561 ) U.S. government agency and government-sponsored enterprise securities — — 253,752 (1,940 ) 253,752 (1,940 ) U.S. government securities — — 248 (2 ) 248 (2 ) Total $ 5,191 $ (8 ) $ 1,713,893 $ (30,595 ) $ 1,719,084 $ (30,603 ) 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)	3 Months Ended
	Mar. 31, 2019
Financing Receivable, Recorded Investment [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): March 31, 2019 December 31, 2018 Loans, excluding PCI loans PCI Loans Total Loans, excluding PCI loans PCI Loans Total (in thousands) Commercial business $ 3,509,472 $ 9,914 $ 3,519,386 $ 3,438,422 $ 9,240 $ 3,447,662 Real estate: One-to-four family residential 282,673 7,494 290,167 238,367 8,017 246,384 Commercial and multifamily residential 3,917,833 61,661 3,979,494 3,846,027 62,910 3,908,937 Total real estate 4,200,506 69,155 4,269,661 4,084,394 70,927 4,155,321 Real estate construction: One-to-four family residential 207,900 147 208,047 217,790 153 217,943 Commercial and multifamily residential 240,458 519 240,977 284,394 534 284,928 Total real estate construction 448,358 666 449,024 502,184 687 502,871 Consumer 312,886 8,522 321,408 318,945 8,906 327,851 Less: Net unearned income (38,681 ) — (38,681 ) (42,194 ) — (42,194 ) Total loans, net of unearned income 8,432,541 88,257 8,520,798 8,301,751 89,760 8,391,511 Less: ALLL (80,029 ) (3,245 ) (83,274 ) (79,758 ) (3,611 ) (83,369 ) Total loans, net $ 8,352,512 $ 85,012 $ 8,437,524 $ 8,221,993 $ 86,149 $ 8,308,142 Loans held for sale $ 4,017 $ — $ 4,017 $ 3,849 $ — $ 3,849
Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Analysis of Nonaccrual Loans	The following is an analysis of nonaccrual loans as of March 31, 2019 and December 31, 2018 : March 31, 2019 December 31, 2018 Recorded Unpaid Principal Recorded Unpaid Principal (in thousands) Commercial business: Secured $ 35,577 $ 46,496 $ 35,504 $ 45,072 Unsecured — — 9 9 Real estate: One-to-four family residential 923 1,018 1,158 1,178 Commercial & multifamily residential: Commercial land 2,570 2,577 2,261 2,270 Income property 1,108 1,118 2,721 3,062 Owner occupied 9,623 9,960 9,922 10,300 Real estate construction: One-to-four family residential: Land and acquisition — — 318 318 Consumer 2,814 3,062 2,949 3,149 Total $ 52,615 $ 64,231 $ 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 March 31, 2019 and December 31, 2018 : Current 30 - 59 60 - 89 Greater Total Nonaccrual Total Loans March 31, 2019 (in thousands) Commercial business: Secured $ 3,337,206 $ 6,848 $ 1,603 $ — $ 8,451 $ 35,577 $ 3,381,234 Unsecured 114,087 32 1,098 — 1,130 — 115,217 Real estate: One-to-four family residential 280,727 680 — — 680 923 282,330 Commercial & multifamily residential: Commercial land 292,125 225 — — 225 2,570 294,920 Income property 1,959,361 2,140 — — 2,140 1,108 1,962,609 Owner occupied 1,627,738 1,123 75 — 1,198 9,623 1,638,559 Real estate construction: One-to-four family residential: Land and acquisition 3,619 — — — — — 3,619 Residential construction 203,318 — — — — — 203,318 Commercial & multifamily residential: Income property 163,674 — — — — — 163,674 Owner occupied 74,736 — — — — — 74,736 Consumer 308,069 1,234 208 — 1,442 2,814 312,325 Total $ 8,364,660 $ 12,282 $ 2,984 $ — $ 15,266 $ 52,615 $ 8,432,541 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 March 31, 2019 and December 31, 2018 : Recorded Investment Recorded Investment Impaired Loans With Impaired Loans Without Recorded Unpaid Related Recorded Unpaid March 31, 2019 (in thousands) Commercial business: Secured $ 3,351,027 $ 30,207 $ 5,426 $ 6,189 $ 2,829 $ 24,781 $ 30,656 Unsecured 115,199 18 — — — 18 18 Real estate: One-to-four family residential 281,466 864 313 793 8 551 568 Commercial & multifamily residential: Commercial land 292,055 2,865 — — — 2,865 2,909 Income property 1,961,287 1,322 — — — 1,322 1,333 Owner occupied 1,622,007 16,552 3,181 4,640 52 13,371 13,617 Real estate construction: One-to-four family residential: Land and acquisition 3,619 — — — — — — Residential construction 203,318 — — — — — — Commercial & multifamily residential: Income property 163,674 — — — — — — Owner occupied 74,736 — — — — — — Consumer 308,870 3,455 2,558 2,703 22 897 1,012 Total $ 8,377,258 $ 55,283 $ 11,478 $ 14,325 $ 2,911 $ 43,805 $ 50,113 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 month periods indicated: Three Months Ended March 31, 2019 2018 Average Recorded Interest Recognized Average Recorded Interest Recognized (in thousands) Commercial business: Secured $ 28,246 $ 12 $ 42,306 $ 12 Unsecured 19 — 24 — Real estate: One-to-four family residential 876 6 881 7 Commercial & multifamily residential: Commercial land 2,546 7 2,569 — Income property 2,138 19 4,292 31 Owner occupied 14,630 118 8,622 84 Real estate construction: One-to-four family residential: Residential construction — — 1,210 — Commercial & multifamily residential: Owner occupied — — 4,050 51 Consumer 3,738 27 6,623 54 Total $ 52,193 $ 189 $ 70,577 $ 239
Analysis of loans classified as Troubled Debt Restructurings (“TDR”)	The following is an analysis of loans classified as TDR during the three months ended March 31, 2019 and 2018 : Three months ended March 31, 2019 Three months ended March 31, 2018 Number of TDR Modifications Pre-Modification Post-Modification Number of TDR Modifications Pre-Modification Post-Modification (dollars in thousands) Commercial business: Secured 2 $ 616 $ 616 1 $ 450 $ 450 Real estate: Commercial and multifamily residential: Income property 1 217 217 — — — Commercial and multifamily residential: Income property — — — 1 891 891 Consumer — — — 7 1,143 1,143 Total 3 $ 833 $ 833 9 $ 2,484 $ 2,484
Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [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 March 31, 2019 and December 31, 2018 : March 31, 2019 December 31, 2018 (in thousands) Commercial business $ 10,270 $ 9,672 Real estate: One-to-four family residential 9,258 9,848 Commercial and multifamily residential 64,958 66,340 Total real estate 74,216 76,188 Real estate construction: One-to-four family residential 147 153 Commercial and multifamily residential 491 507 Total real estate construction 638 660 Consumer 9,294 9,765 Subtotal of PCI loans 94,418 96,285 Less: Valuation discount resulting from acquisition accounting 6,161 6,525 ALLL 3,245 3,611 PCI loans, net of valuation discounts and allowance for loan losses $ 85,012 $ 86,149
Changes in Accretable Yield for Acquired Loans	The following table shows the changes in accretable yield for PCI loans for the three months ended March 31, 2019 and 2018 : Three Months Ended March 31, 2019 2018 (in thousands) Balance at beginning of period $ 21,949 $ 31,176 Accretion (1,577 ) (2,265 ) Disposals 103 (159 ) Reclassifications from nonaccretable difference 1,374 603 Balance at end of period $ 21,849 $ 29,355

Allowance for Loan and Lease _2

Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Tables)	3 Months Ended
	Mar. 31, 2019
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Credit Losses on Financing Receivables	The following tables show a detailed analysis of the ALLL for the three months ended March 31, 2019 and 2018 : Beginning Charge-offs Recoveries Provision (Recapture) Ending Specific General Three months ended March 31, 2019 (in thousands) Commercial business: Secured $ 43,188 $ (1,249 ) $ 323 $ 1,355 $ 43,617 $ 2,829 $ 40,788 Unsecured 2,626 — 157 (288 ) 2,495 — 2,495 Real estate: One-to-four family residential 593 (2 ) 17 8 616 8 608 Commercial & multifamily residential: Commercial land 3,947 — 7 634 4,588 — 4,588 Income property 4,044 — 23 951 5,018 — 5,018 Owner occupied 4,533 — 1 432 4,966 52 4,914 Real estate construction: One-to-four family residential: Land and acquisition 549 — 59 (201 ) 407 — 407 Residential construction 5,536 (170 ) 1 99 5,466 — 5,466 Commercial & multifamily residential: Income property 5,784 — — (1,267 ) 4,517 — 4,517 Owner occupied 2,604 — — (384 ) 2,220 — 2,220 Consumer 5,301 (478 ) 238 484 5,545 22 5,523 PCI 3,611 (1,089 ) 705 18 3,245 — 3,245 Unallocated 1,053 — — (479 ) 574 — 574 Total $ 83,369 $ (2,988 ) $ 1,531 $ 1,362 $ 83,274 $ 2,911 $ 80,363 Beginning Charge-offs Recoveries Provision (Recapture) Ending Specific General Three months ended March 31, 2018 (in thousands) Commercial business: Secured $ 29,341 $ (2,414 ) $ 553 $ 9,851 $ 37,331 $ 5,657 $ 31,674 Unsecured 2,000 (63 ) 249 409 2,595 2 2,593 Real estate: One-to-four family residential 701 — 172 (315 ) 558 22 536 Commercial & multifamily residential: Commercial land 4,265 — 6 (526 ) 3,745 — 3,745 Income property 5,672 (223 ) 141 (888 ) 4,702 — 4,702 Owner occupied 5,459 — 12 (722 ) 4,749 5 4,744 Real estate construction: One-to-four family residential: Land and acquisition 963 — 16 (67 ) 912 — 912 Residential construction 3,709 — 3 924 4,636 — 4,636 Commercial & multifamily residential: Income property 7,053 — — 421 7,474 — 7,474 Owner occupied 4,413 — — (2,490 ) 1,923 — 1,923 Consumer 5,163 (264 ) 260 57 5,216 171 5,045 PCI 6,907 (1,343 ) 1,224 (1,123 ) 5,665 — 5,665 Unallocated — — — 321 321 — 321 Total $ 75,646 $ (4,307 ) $ 2,636 $ 5,852 $ 79,827 $ 5,857 $ 73,970
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 March 31, 2019 2018 (in thousands) Balance at beginning of period $ 4,330 $ 3,130 Net changes in the allowance for unfunded commitments and letters of credit (550 ) 1,200 Balance at end of period $ 3,780 $ 4,330
Financing Receivable Credit Quality Indicators	The following is an analysis of the credit quality of our loan portfolio, excluding PCI loans, as of March 31, 2019 and December 31, 2018 : Pass Special Mention Substandard Doubtful Loss Total March 31, 2019 (in thousands) Loans, excluding PCI loans: Commercial business: Secured $ 3,217,555 $ 58,919 $ 104,760 $ — $ — $ 3,381,234 Unsecured 115,089 26 102 — — 115,217 Real estate: One-to-four family residential 281,107 — 1,223 — — 282,330 Commercial and multifamily residential: Commercial land 286,993 2,472 5,455 — — 294,920 Income property 1,918,999 1,560 42,050 — — 1,962,609 Owner occupied 1,578,780 13,724 46,055 — — 1,638,559 Real estate construction: One-to-four family residential: Land and acquisition 3,619 — — — — 3,619 Residential construction 203,318 — — — — 203,318 Commercial and multifamily residential: Income property 163,674 — — — — 163,674 Owner occupied 74,148 — 588 — — 74,736 Consumer 307,950 — 4,375 — — 312,325 Total $ 8,151,232 $ 76,701 $ 204,608 $ — $ — 8,432,541 Less: ALLL 80,029 Loans, excluding PCI loans, net $ 8,352,512 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 March 31, 2019 and December 31, 2018 : Pass Special Mention Substandard Doubtful Loss Total March 31, 2019 (in thousands) PCI loans: Commercial business: Secured $ 8,749 $ — $ 804 $ — $ — $ 9,553 Unsecured 717 — — — — 717 Real estate: One-to-four family residential 8,565 — 693 — — 9,258 Commercial and multifamily residential: Commercial land 9,974 141 71 — — 10,186 Income property 19,350 — — — — 19,350 Owner occupied 28,662 — 6,760 — — 35,422 Real estate construction: One-to-four family residential: Land and acquisition 146 — 1 — — 147 Commercial and multifamily residential: Income property 491 — — — — 491 Consumer 8,908 — 386 — — 9,294 Total $ 85,562 $ 141 $ 8,715 $ — $ — 94,418 Less: Valuation discount resulting from acquisition accounting 6,161 ALLL 3,245 PCI loans, net $ 85,012 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)	3 Months Ended
	Mar. 31, 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 months ended March 31, 2019 and 2018 : Three Months Ended March 31, 2019 2018 (in thousands) Balance, beginning of period $ 6,019 $ 13,298 Transfers in 386 406 Valuation adjustments (195 ) (92 ) Proceeds from sale of OREO property (121 ) (2,062 ) Loss on sale of OREO, net (14 ) (43 ) Balance, end of period $ 6,075 $ 11,507

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 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 March 31, 2019 2018 (in thousands) Goodwill Total goodwill $ 765,842 $ 765,842 Other intangible assets, net CDI: Gross CDI balance at beginning of period 105,473 105,473 Accumulated amortization at beginning of period (60,455 ) (48,219 ) CDI, net at beginning of period 45,018 57,254 CDI current period amortization (2,748 ) (3,188 ) Total CDI, net at end of period 42,270 54,066 Intangible assets not subject to amortization 919 919 Other intangible assets, net at end of period 43,189 54,985 Total goodwill and other intangible assets at end of period $ 809,031 $ 820,827
Estimated Future Amortization Expense of Core Deposit Intangibles	The following table provides the estimated future amortization expense of our CDI for the remaining nine months ending December 31, 2019 and the succeeding four years: Year ending December 31, (in thousands) 2019 $ 7,731 2020 8,724 2021 7,264 2022 5,880 2023 4,552

Derivatives and Balance Sheet_2

Derivatives and Balance Sheet Offsetting (Tables)	3 Months Ended
	Mar. 31, 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 at March 31, 2019 and December 31, 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 March 31, Three Months Ended March 31, 2019 2018 2019 2018 (in thousands) Interest rate collar $ 6,268 $ — 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 March 31, 2019 and December 31, 2018 : Asset Derivatives Liability Derivatives March 31, 2019 December 31, 2018 March 31, 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 $ 6,268 Other assets $ — Other liabilities $ — Other liabilities $ — Derivatives not designated as hedging instruments: Interest rate swap contracts Other assets $ 8,815 Other assets $ 7,033 Other liabilities $ 8,815 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 Posted Net Amount March 31, 2019 (in thousands) Assets Interest rate swap contracts $ 8,815 $ — $ 8,815 $ — $ 8,815 Interest rate collar $ 6,268 $ — $ 6,268 $ — 6,268 Liabilities Interest rate swap contracts $ 8,815 $ — $ 8,815 $ (5,573 ) $ 3,242 Repurchase agreements $ 23,018 $ — $ 23,018 $ (23,018 ) $ — 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: March 31, 2019 (in thousands) Washington and Oregon State to secure public deposits $ 277,815 FRB to secure borrowings 54,717 Other securities pledged 140,755 Total securities pledged as collateral $ 473,287
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 March 31, 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 $ 23,018 $ — $ — $ — $ 23,018 Gross amount of recognized liabilities for repurchase agreements 23,018 Amounts related to agreements not included in offsetting disclosure $ —

Commitments and Contingent Li_2

Commitments and Contingent Liabilities (Tables)	3 Months Ended
	Mar. 31, 2019
Commitments and Contingencies Disclosure [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 March 31, 2019 (in thousands) Operating lease asset Other assets $ 48,211 Operating lease liability Other liabilities $ 54,246
Lease, Cost [Table Text Block]	The following table shows the components of net lease costs: Three Months Ended March 31, Item Statement of Income Location 2019 (in thousands) Operating lease cost Occupancy $ 2,820 Variable lease cost Occupancy 506 Sublease income Occupancy (315 ) Net lease cost $ 3,011
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 nine months of 2019 and subsequent years: Year ending December 31, (in thousands) 2019 $ 8,297 2020 9,920 2021 8,883 2022 8,256 2023 6,949 Thereafter 19,561 Total future minimum lease payments 61,866 Amounts representing interest (7,620 ) Present value of minimum lease payments $ 54,246
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 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

Shareholders' Equity Dividends

Shareholders' Equity Dividends Declared (Tables)	3 Months Ended
	Mar. 31, 2019
Shareholders' Equity [Abstract]
Dividends Declared [Table Text Block]	The following table summarizes year-to-date dividend activity as of March 31, 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

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 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 month periods ended March 31, 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 March 31, 2019 (in thousands) Beginning balance $ (33,128 ) $ (2,177 ) $ — $ (35,305 ) Other comprehensive income before reclassifications 32,063 — 4,810 36,873 Amounts reclassified from accumulated other comprehensive loss (2) 1,417 61 — 1,478 Net current-period other comprehensive income 33,480 61 4,810 38,351 Ending balance $ 352 $ (2,116 ) $ 4,810 $ 3,046 Three months ended March 31, 2018 Beginning balance $ (19,779 ) $ (2,446 ) $ — $ (22,225 ) Adjustment pursuant to adoption of ASU 2016-01 157 — — 157 Other comprehensive loss before reclassifications (26,048 ) — — (26,048 ) Amounts reclassified from accumulated other comprehensive loss (2) (78 ) 61 — (17 ) Net current-period other comprehensive income (loss) (26,126 ) 61 — (26,065 ) Ending balance $ (45,748 ) $ (2,385 ) $ — $ (48,133 ) __________ (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 month periods ended March 31, 2019 and 2018 : Amount Reclassified from Accumulated Other Comprehensive Income (Loss) Three Months Ended March 31, Affected line Item in the Consolidated 2019 2018 Statement of Income (in thousands) Unrealized gains and losses on available for sale debt securities Investment securities (gains) losses, net $ (1,847 ) $ 102 Investment securities gains, net (1,847 ) 102 Total before tax 430 (24 ) Income tax provision $ (1,417 ) $ 78 Net of tax Amortization of pension plan liability Actuarial losses $ (80 ) $ (80 ) Compensation and employee benefits (80 ) (80 ) Total before tax 19 19 Income tax provision $ (61 ) $ (61 ) Net of tax

Fair Value Accounting and Mea_2

Fair Value Accounting and Measurement (Tables)	3 Months Ended
	Mar. 31, 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 March 31, 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 March 31, 2019 (in thousands) Assets Debt securities available for sale: U.S. government agency and government-sponsored enterprise mortgage-back securities and collateralized mortgage obligations $ 2,155,614 $ — $ 2,155,614 $ — State and municipal debt securities 536,490 — 536,490 — U.S. government agency and government-sponsored enterprise securities 334,917 — 334,917 — U.S. government securities 249 249 — — Total debt securities available for sale $ 3,027,270 $ 249 $ 3,027,021 $ — Other assets: Interest rate contracts $ 8,815 $ — $ 8,815 $ — Interest rate collar 6,268 — 6,268 — Liabilities Other liabilities: Interest rate contracts $ 8,815 $ — $ 8,815 $ — 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 Fair Value Measurements at Reporting Date Using Losses During the Three Months Ended Level 1 Level 2 Level 3 (in thousands) Impaired loans $ 3,840 $ — $ — $ 3,840 $ 2,597 OREO 530 — — 530 195 $ 4,370 $ — $ — $ 4,370 $ 2,792 Fair Value at March 31, 2018 Fair Value Measurements at Reporting Date Using Losses During the Three Months Ended Level 1 Level 2 Level 3 (in thousands) Impaired loans $ 7,820 $ — $ — $ 7,820 $ 5,058 OREO 160 — — 160 51 $ 7,980 $ — $ — $ 7,980 $ 5,109
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 March 31, 2019 and December 31, 2018 : March 31, 2019 Carrying Fair Level 1 Level 2 Level 3 (in thousands) Assets Cash and due from banks $ 178,591 $ 178,591 $ 178,591 $ — $ — Interest-earning deposits with banks 33,482 33,482 33,482 — — Debt securities available for sale 3,027,270 3,027,270 249 3,027,021 — FHLB stock 25,600 25,960 — 25,960 — Loans held for sale 4,017 4,017 — 4,017 — Loans 8,437,524 8,541,649 — — 8,541,649 Interest rate contracts 8,815 8,815 — 8,815 — Interest rate collar 6,268 6,268 — 6,268 — Liabilities Time deposits $ 411,945 $ 406,652 $ — $ 406,652 $ — FHLB advances 390,510 390,988 — 390,988 — Repurchase agreements 23,018 23,018 — 23,018 — Subordinated debentures 35,416 36,053 — 36,053 — Interest rate contracts 8,815 8,815 — 8,815 — 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, Measurements, 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 Valuation Technique Unobservable Input Range (Weighted Average) (1) (dollars in thousands) Impaired loans - collateral-dependent (3) $ 3,840 Fair Market Value of Collateral Adjustment to Stated Value 0.00% - 100.00% (44.53%) OREO $ 530 Fair Market Value of Collateral Adjustment to Appraisal Value N/A (2) __________ (1) Discount applied to appraisal value or stated value (in the case of accounts receivable, fixed assets, and inventory). (2) Quantitative disclosures are not provided for OREO because there were no adjustments made to the appraisal values during the current period. (3) Collateral consists of accounts receivable, fixed assets, inventory, real estate and state guarantee. Fair Value at March 31, 2018 Valuation Technique Unobservable Input Range (Weighted Average) (1) (dollars in thousands) Impaired loans - collateral-dependent (3) $ 7,512 Fair Market Value of Collateral Adjustment to Stated Value 0.00% - 100.00% (41.33%) Impaired loans - other (4) $ 308 Discounted Cash Flow Discount Rate 6.00% OREO $ 160 Fair Market Value of Collateral Adjustment to Appraisal Value N/A (2) __________ (1) Discount rate applied to discounted cash flow valuation or appraisal value and stated value (in the case of accounts receivable, fixed assets, and inventory). (2) Quantitative disclosures are not provided for OREO because there were no adjustments made to the appraisal values during the current period. (3) Collateral consists of accounts receivable, fixed assets, inventory and real estate.

Earnings per Common Share (Tabl

Earnings per Common Share (Tables)	3 Months Ended
	Mar. 31, 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 months ended March 31, 2019 and 2018 : Three Months Ended March 31, 2019 2018 (in thousands except per share amounts) Basic EPS: Net income $ 45,871 $ 39,970 Less: Earnings allocated to participating securities: Nonvested restricted shares 456 437 Earnings allocated to common shareholders $ 45,415 $ 39,533 Weighted average common shares outstanding 72,521 72,300 Basic earnings per common share $ 0.63 $ 0.55 Diluted EPS: Earnings allocated to common shareholders $ 45,415 $ 39,533 Weighted average common shares outstanding 72,521 72,300 Dilutive effect of equity awards 3 5 Weighted average diluted common shares outstanding 72,524 72,305 Diluted earnings per common share $ 0.63 $ 0.55 Potentially dilutive share options that were not included in the computation of diluted EPS because to do so would be anti-dilutive — 12

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	3 Months Ended
	Mar. 31, 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 month periods ended March 31, 2019 and 2018 : Three Months Ended March 31, 2019 2018 (in thousands) Noninterest income: Revenue from contracts with customers: Deposit account and treasury management fees $ 8,980 $ 8,740 Card revenue 3,662 5,813 Financial services and trust revenue 2,957 2,730 Total revenue from contracts with customers 15,599 17,283 Other sources of noninterest income 6,097 5,860 Total noninterest income $ 21,696 $ 23,143

Accounting Pronouncements Rec_2

Accounting Pronouncements Recently Issued Narrative - Impact of implementation of new accounting standards (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Dec. 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)
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			$ (203)

Securities (Summary of Gross Un

Securities (Summary of Gross Unrealized Losses and Fair Value of the Investments with Unrealized Losses) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months Fair Value	$ 5,191	$ 276,306
Less than 12 Months Unrealized Losses	(8)	(1,598)
12 Months or More Fair Value	1,713,893	1,873,565
12 Months or More Unrealized Losses	(30,595)	(54,368)
Total Fair Value	1,719,084	2,149,871
Total Unrealized Losses	(30,603)	(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	1,879	154,622
Less than 12 Months Unrealized Losses	(7)	(972)
12 Months or More Fair Value	1,250,289	1,301,387
12 Months or More Unrealized Losses	(26,093)	(42,495)
Total Fair Value	1,252,168	1,456,009
Total Unrealized Losses	(26,100)	(43,467)
State and Municipal Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months Fair Value	3,312	106,292
Less than 12 Months Unrealized Losses	(1)	(581)
12 Months or More Fair Value	209,604	280,496
12 Months or More Unrealized Losses	(2,560)	(7,179)
Total Fair Value	212,916	386,788
Total Unrealized Losses	(2,561)	(7,760)
US Government Corporations and Agencies Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months Fair Value	0	15,392
Less than 12 Months Unrealized Losses	0	(45)
12 Months or More Fair Value	253,752	291,435
12 Months or More Unrealized Losses	(1,940)	(4,691)
Total Fair Value	253,752	306,827
Total Unrealized Losses	(1,940)	(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	248	247
12 Months or More Unrealized Losses	(2)	(3)
Total Fair Value	248	247
Total Unrealized Losses	$ (2)	$ (3)

Securities (Securities Availabl

Securities (Securities Available for Sale) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Proceeds from Sale of Debt Securities, Available-for-sale	$ 83,968	$ 19,761
Debt securities available-for-sale, amortized cost	3,026,815		$ 3,210,615
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	31,058		12,799
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	30,603		55,966
Debt securities available for sale at fair value	3,027,270		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	2,156,810		2,222,521
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	24,904		9,236
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	26,100		43,467
Debt securities available for sale at fair value	2,155,614		2,188,290
State and Municipal Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt securities available-for-sale, amortized cost	534,218		579,755
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	4,833		2,328
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	2,561		7,760
Debt securities available for sale at fair value	536,490		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	335,536		408,088
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	1,321		1,235
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	1,940		4,736
Debt securities available for sale at fair value	334,917		404,587
US Government Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt securities available-for-sale, amortized cost	251		251
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0		0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	2		3
Debt securities available for sale at fair value	$ 249		$ 248

Securities (Schedule of Contrac

Securities (Schedule of Contractual Maturities of Investment Securities Available for Sale) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Abstract]
Due within one year, Amortized Cost	$ 111,449
Due after one year through five years, Amortized Cost	528,884
Due after five years through ten years, Amortized Cost	1,324,754
Due after ten years, Amortized Cost	1,061,728
Debt securities available-for-sale, amortized cost	3,026,815	$ 3,210,615
Due within one year, Fair Value	111,405
Due after one year through five years, Fair Value	526,821
Due after five years through ten years, Fair Value	1,341,174
Due after ten years, Fair Value	1,047,870
Debt securities available-for-sale, Fair Value	$ 3,027,270	$ 3,167,448

Securities (Carrying Value of S

Securities (Carrying Value of Securities Pledged as Collateral) (Details) $ in Thousands	Mar. 31, 2019USD ($)
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Restricted	$ 473,287
Washington and Oregon State Public Deposits [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Restricted	277,815
Federal Reserve Bank Advances [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Restricted	54,717
Other Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Restricted	$ 140,755

Securities Securities (Summary

Securities Securities (Summary of Gross Realized Gains and Gross Realized Losses (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Proceeds from Sale of Debt Securities, Available-for-sale		$ 83,968	$ 19,761
Gross Realized Gains from sales of debt securities available for sale		1,847	148
Gross Realized Losses from sales of debt securities available for sale		0	(46)
Other securities losses, net	[1]	0	(80)
Investment securities gain (loss), net		$ 1,847	$ 22
[1]	Other securities losses, net includes net unrealized loss activity associated with equity securities for the period ended March 31, 2018

Securities (Narrative) (Details

Securities (Narrative) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)security	Mar. 31, 2018USD ($)
Debt Securities, Available-for-sale [Line Items]
Proceeds from Sale of Debt Securities, Available-for-sale | $	$ 83,968	$ 19,761
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	407
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	401
Municipal Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	246
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	243
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	36
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	36
US Government Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	1
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	1

Loans (Narrative) (Details)

Loans (Narrative) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)contract	Mar. 31, 2018contract	Dec. 31, 2018USD ($)
Financing Receivable, Recorded Investment [Line Items]
Loans to related parties	$ 9,500		$ 9,600
Loans and Leases Receivable, Related Parties, Advances	0
Repayments on related party loans	$ 99
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | contract	1	0
Loans Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	$ 3,240,000		3,220,000
Federal Reserve Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	$ 86,100		$ 82,000

Loans (Analysis of Loan Portfol

Loans (Analysis of Loan Portfolio by Major Types of Loans) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Less: unearned income on loans	$ (38,681)	$ (42,194)
Recorded Investment	8,520,798	8,391,511
Allowance for loan losses	(83,274)	(83,369)	$ (79,827)	$ (75,646)
Loans, net	8,437,524	8,308,142
Loans held for sale	4,017	3,849
Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Less: unearned income on loans	(38,681)	(42,194)
Recorded Investment	8,432,541	8,301,751
Allowance for loan losses	(80,029)	(79,758)
Loans, net	8,352,512	8,221,993
Loans held for sale	4,017	3,849
Loans and Leases Receivable, Gross	8,432,541	8,301,751
Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Less: unearned income on loans	0	0
Recorded Investment	88,257	89,760
Allowance for loan losses	(3,245)	(3,611)
Loans, net	85,012	86,149
Loans held for sale	0	0
Loans and Leases Receivable, Gross	94,418	96,285
Acquisition Accounting Valuation Discount on Covered Loans	6,161	6,525
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial and Industrial	3,519,386	3,447,662
Commercial Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial and Industrial	3,509,472	3,438,422
Commercial Portfolio Segment [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial and Industrial	9,914	9,240
Loans and Leases Receivable, Gross	10,270	9,672
One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross, Consumer, Mortgage	290,167	246,384
Loans and Leases Receivable, Gross, Consumer, Construction	208,047	217,943
Allowance for loan losses	(616)	(593)	(558)	(701)
One-to-Four Family Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross, Consumer, Mortgage	282,673	238,367
Loans and Leases Receivable, Gross, Consumer, Construction	207,900	217,790
Loans and Leases Receivable, Gross	282,330	236,026
One-to-Four Family Residential [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross, Consumer, Mortgage	7,494	8,017
Loans and Leases Receivable, Gross, Consumer, Construction	147	153
Loans and Leases Receivable, Gross	9,258	9,848
Commercial and Multifamily Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Mortgage	3,979,494	3,908,937
Loans Receivable, Gross, Commercial, Construction	240,977	284,928
Commercial and Multifamily Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Mortgage	3,917,833	3,846,027
Loans Receivable, Gross, Commercial, Construction	240,458	284,394
Commercial and Multifamily Residential [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Mortgage	61,661	62,910
Loans Receivable, Gross, Commercial, Construction	519	534
Loans and Leases Receivable, Gross	64,958	66,340
Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable Real Estate Mortgage	4,269,661	4,155,321
Real Estate Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable Real Estate Mortgage	4,200,506	4,084,394
Real Estate Portfolio Segment [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable Real Estate Mortgage	69,155	70,927
Loans and Leases Receivable, Gross	74,216	76,188
Real Estate Construction Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable Real Estate Construction	449,024	502,871
Real Estate Construction Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable Real Estate Construction	448,358	502,184
Real Estate Construction Portfolio Segment [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable Real Estate Construction	666	687
Loans and Leases Receivable, Gross	638	660
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross, Consumer	321,408	327,851
Allowance for loan losses	(5,545)	(5,301)	$ (5,216)	$ (5,163)
Consumer Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross, Consumer	312,886	318,945
Loans and Leases Receivable, Gross	312,325	318,215
Consumer Portfolio Segment [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross, Consumer	8,522	8,906
Loans and Leases Receivable, Gross	9,294	9,765
One-to-Four Family Residential Construction [Domain] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	147	153
Commercial and Multifamily Residential Construction [Domain] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	$ 491	$ 507

Loans (Analysis of Nonaccrual L

Loans (Analysis of Nonaccrual Loans) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	$ 52,615	$ 54,842
Unpaid Principal Balance Nonaccrual Loans	64,231	65,358
Secured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	35,577	35,504
Unpaid Principal Balance Nonaccrual Loans	46,496	45,072
Unsecured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	0	9
Unpaid Principal Balance Nonaccrual Loans	0	9
One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	923	1,158
Unpaid Principal Balance Nonaccrual Loans	1,018	1,178
Commercial Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	2,570	2,261
Unpaid Principal Balance Nonaccrual Loans	2,577	2,270
Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	1,108	2,721
Unpaid Principal Balance Nonaccrual Loans	1,118	3,062
Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	9,623	9,922
Unpaid Principal Balance Nonaccrual Loans	9,960	10,300
Land And Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	0	318
Unpaid Principal Balance Nonaccrual Loans	0	318
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	2,814	2,949
Unpaid Principal Balance Nonaccrual Loans	$ 3,062	$ 3,149

Loans (Analysis of the Aged Loa

Loans (Analysis of the Aged Loan Portfolio) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	$ 52,615	$ 54,842
Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	8,364,660	8,218,651
Past Due Loans	15,266	28,258
Nonaccrual Loans	52,615	54,842
Total Loans	8,432,541	8,301,751
Secured Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	35,577	35,504
Secured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	3,337,206	3,267,709
Past Due Loans	8,451	9,488
Nonaccrual Loans	35,577	35,504
Total Loans	3,381,234	3,312,701
Unsecured Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	0	9
Unsecured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	114,087	111,868
Past Due Loans	1,130	240
Nonaccrual Loans	0	9
Total Loans	115,217	112,117
One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	923	1,158
One-to-Four Family Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	280,727	233,941
Past Due Loans	680	927
Nonaccrual Loans	923	1,158
Total Loans	282,330	236,026
Commercial Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	2,570	2,261
Commercial Land [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	292,125	283,416
Past Due Loans	225	0
Nonaccrual Loans	2,570	2,261
Total Loans	294,920	285,677
Income Property Multifamily [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	1,108	2,721
Income Property Multifamily [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	1,959,361	1,910,505
Past Due Loans	2,140	7,250
Nonaccrual Loans	1,108	2,721
Total Loans	1,962,609	1,920,476
Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	9,623	9,922
Owner Occupied [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	1,627,738	1,606,085
Past Due Loans	1,198	1,744
Nonaccrual Loans	9,623	9,922
Total Loans	1,638,559	1,617,751
Land And Acquisition [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	0	318
Land And Acquisition [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	3,619	4,099
Past Due Loans	0	0
Nonaccrual Loans	0	318
Total Loans	3,619	4,417
Residential Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	203,318	212,303
Past Due Loans	0	93
Nonaccrual Loans	0	0
Total Loans	203,318	212,396
Income Property Multifamily Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	163,674	194,912
Past Due Loans	0	0
Nonaccrual Loans	0	0
Total Loans	163,674	194,912
Owner Occupied Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	74,736	79,805
Past Due Loans	0	7,258
Nonaccrual Loans	0	0
Total Loans	74,736	87,063
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	2,814	2,949
Consumer Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	308,069	314,008
Past Due Loans	1,442	1,258
Nonaccrual Loans	2,814	2,949
Total Loans	312,325	318,215
Financing Receivables, 60 to 89 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	2,984	6,299
Financing Receivables, 60 to 89 Days Past Due [Member] | Secured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	1,603	3,624
Financing Receivables, 60 to 89 Days Past Due [Member] | Unsecured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	1,098	0
Financing Receivables, 60 to 89 Days Past Due [Member] | One-to-Four Family Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	233
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Land [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Income Property Multifamily [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	2,241
Financing Receivables, 60 to 89 Days Past Due [Member] | Owner Occupied [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	75	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Land And Acquisition [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Residential Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Income Property Multifamily Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Owner Occupied Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	208	201
Financing Receivables, 30 to 59 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	12,282	21,959
Financing Receivables, 30 to 59 Days Past Due [Member] | Secured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	6,848	5,864
Financing Receivables, 30 to 59 Days Past Due [Member] | Unsecured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	32	240
Financing Receivables, 30 to 59 Days Past Due [Member] | One-to-Four Family Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	680	694
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Land [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	225	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Income Property Multifamily [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	2,140	5,009
Financing Receivables, 30 to 59 Days Past Due [Member] | Owner Occupied [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	1,123	1,744
Financing Receivables, 30 to 59 Days Past Due [Member] | Land And Acquisition [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Residential Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	93
Financing Receivables, 30 to 59 Days Past Due [Member] | Income Property Multifamily Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Owner Occupied Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	7,258
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	1,234	1,057
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Secured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Unsecured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | One-to-Four Family Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Land [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Income Property Multifamily [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Owner Occupied [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Land And Acquisition [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Residential Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Income Property Multifamily Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Owner Occupied Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, 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
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	$ 8,377,258		$ 8,252,647
Recorded Investment of Loans Individually Measured for Specific Impairment	55,283		49,104
Recorded Investment	43,805		35,753
Unpaid Principal Balance	50,113		40,716
Related Allowance	2,911		2,132
Average Recorded Investment Impaired Loans	52,193	$ 70,577
Interest Recognized on Impaired Loans	189	239
Secured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	3,351,027		3,286,416
Recorded Investment of Loans Individually Measured for Specific Impairment	30,207		26,285
Recorded Investment	5,426		6,350
Unpaid Principal Balance	6,189		8,460
Related Allowance	2,829		2,023
Average Recorded Investment Impaired Loans	28,246	42,306
Interest Recognized on Impaired Loans	12	12
Unsecured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	115,199		112,097
Recorded Investment of Loans Individually Measured for Specific Impairment	18		20
Recorded Investment	0		20
Unpaid Principal Balance	0		20
Related Allowance	0		0
Average Recorded Investment Impaired Loans	19	24
Interest Recognized on Impaired Loans	0	0
One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	281,466		235,138
Recorded Investment of Loans Individually Measured for Specific Impairment	864		888
Recorded Investment	313		325
Unpaid Principal Balance	793		798
Related Allowance	8		8
Average Recorded Investment Impaired Loans	876	881
Interest Recognized on Impaired Loans	6	7
Commercial Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	292,055		283,451
Recorded Investment of Loans Individually Measured for Specific Impairment	2,865		2,226
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
Average Recorded Investment Impaired Loans	2,546	2,569
Interest Recognized on Impaired Loans	7	0
Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	1,961,287		1,917,522
Recorded Investment of Loans Individually Measured for Specific Impairment	1,322		2,954
Recorded Investment	0		99
Unpaid Principal Balance	0		165
Related Allowance	0		1
Average Recorded Investment Impaired Loans	2,138	4,292
Interest Recognized on Impaired Loans	19	31
Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	1,622,007		1,605,042
Recorded Investment of Loans Individually Measured for Specific Impairment	16,552		12,709
Recorded Investment	3,181		3,231
Unpaid Principal Balance	4,640		4,666
Related Allowance	52		69
Average Recorded Investment Impaired Loans	14,630	8,622
Interest Recognized on Impaired Loans	118	84
Land And Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	3,619		4,417
Recorded Investment of Loans Individually Measured for Specific Impairment	0		0
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	203,318		212,396
Recorded Investment of Loans Individually Measured for Specific Impairment	0		0
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
Average Recorded Investment Impaired Loans	0	1,210
Interest Recognized on Impaired Loans	0	0
Income Property Multifamily Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	163,674		194,912
Recorded Investment of Loans Individually Measured for Specific Impairment	0		0
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
Owner Occupied Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	74,736		87,063
Recorded Investment of Loans Individually Measured for Specific Impairment	0		0
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
Average Recorded Investment Impaired Loans	0	4,050
Interest Recognized on Impaired Loans	0	51
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment of Loans Collectively Measured for Contingency Provision	308,870		314,193
Recorded Investment of Loans Individually Measured for Specific Impairment	3,455		4,022
Recorded Investment	2,558		3,326
Unpaid Principal Balance	2,703		3,584
Related Allowance	22		31
Average Recorded Investment Impaired Loans	3,738	6,623
Interest Recognized on Impaired Loans	27	$ 54
Impaired Loans With Recorded Allowance [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	11,478		13,351
Unpaid Principal Balance	14,325		17,693
Impaired Loans Without Recorded Allowance [Member] | Secured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	24,781		19,935
Unpaid Principal Balance	30,656		24,404
Impaired Loans Without Recorded Allowance [Member] | Unsecured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	18		0
Unpaid Principal Balance	18		0
Impaired Loans Without Recorded Allowance [Member] | One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	551		563
Unpaid Principal Balance	568		575
Impaired Loans Without Recorded Allowance [Member] | Commercial Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	2,865		2,226
Unpaid Principal Balance	2,909		2,272
Impaired Loans Without Recorded Allowance [Member] | Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	1,322		2,855
Unpaid Principal Balance	1,333		3,011
Impaired Loans Without Recorded Allowance [Member] | Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	13,371		9,478
Unpaid Principal Balance	13,617		9,750
Impaired Loans Without Recorded Allowance [Member] | Land And Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Impaired Loans Without Recorded Allowance [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Impaired Loans Without Recorded Allowance [Member] | Income Property Multifamily Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Impaired Loans Without Recorded Allowance [Member] | Owner Occupied Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Impaired Loans Without Recorded Allowance [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	897		696
Unpaid Principal Balance	$ 1,012		$ 704

Loans Loans (Analysis of Troubl

Loans Loans (Analysis of Troubled Debt Restructurings) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)Modificationscontract	Mar. 31, 2018USD ($)Modificationscontract	Dec. 31, 2018USD ($)
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | contract	1	0
Loans and Leases Receivable, Related Parties	$ 9,500		$ 9,600
Financing Receivable Modifications Additional Commitment To Lend	1,300		$ 2,100
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 26	$ 0
Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications	3	9
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 833	$ 2,484
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 833	$ 2,484
Loans, Excluding Purchased Credit Impaired Loans [Member] | Secured Loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications	2	1
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 616	$ 450
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 616	$ 450
Loans, Excluding Purchased Credit Impaired Loans [Member] | Income Property Multifamily [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications	1	0
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 217	$ 0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 217	$ 0
Loans, Excluding Purchased Credit Impaired Loans [Member] | Income Property Multifamily Construction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications	0	1
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 0	$ 891
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 891
Loans, Excluding Purchased Credit Impaired Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Modifications	0	7
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 0	$ 1,143
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 1,143

Loans Loans (Analysis of Purcha

Loans Loans (Analysis of Purchased Credit Impaired Loans - Accretable Yield Rollforward) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 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	$ 21,849	$ 29,355	$ 21,949	$ 31,176
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	1,577	2,265
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Disposals of Loans	(103)	159
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference	$ 1,374	$ 603

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
	Mar. 31, 2019	Mar. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for loan and lease losses	$ 1,362	$ 5,852

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
	Mar. 31, 2019	Mar. 31, 2018
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 83,369	$ 75,646
Charged-offs	(2,988)	(4,307)
Recoveries	1,531	2,636
Provision for loan and lease losses	1,362	5,852
Ending balance	83,274	79,827
Specific Reserve	2,911	5,857
General Allocation	80,363	73,970
Secured Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	43,188	29,341
Charged-offs	(1,249)	(2,414)
Recoveries	323	553
Provision for loan and lease losses	1,355	9,851
Ending balance	43,617	37,331
Specific Reserve	2,829	5,657
General Allocation	40,788	31,674
Unsecured Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	2,626	2,000
Charged-offs	0	(63)
Recoveries	157	249
Provision for loan and lease losses	(288)	409
Ending balance	2,495	2,595
Specific Reserve	0	2
General Allocation	2,495	2,593
One-to-Four Family Residential [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	593	701
Charged-offs	(2)	0
Recoveries	17	172
Provision for loan and lease losses	8	(315)
Ending balance	616	558
Specific Reserve	8	22
General Allocation	608	536
Commercial Land [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,947	4,265
Charged-offs	0	0
Recoveries	7	6
Provision for loan and lease losses	634	(526)
Ending balance	4,588	3,745
Specific Reserve	0	0
General Allocation	4,588	3,745
Income Property Multifamily [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	4,044	5,672
Charged-offs	0	(223)
Recoveries	23	141
Provision for loan and lease losses	951	(888)
Ending balance	5,018	4,702
Specific Reserve	0	0
General Allocation	5,018	4,702
Owner Occupied [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	4,533	5,459
Charged-offs	0	0
Recoveries	1	12
Provision for loan and lease losses	432	(722)
Ending balance	4,966	4,749
Specific Reserve	52	5
General Allocation	4,914	4,744
Land And Acquisition [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	549	963
Charged-offs	0	0
Recoveries	59	16
Provision for loan and lease losses	(201)	(67)
Ending balance	407	912
Specific Reserve	0	0
General Allocation	407	912
Residential Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	5,536	3,709
Charged-offs	(170)	0
Recoveries	1	3
Provision for loan and lease losses	99	924
Ending balance	5,466	4,636
Specific Reserve	0	0
General Allocation	5,466	4,636
Income Property Multifamily Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	5,784	7,053
Charged-offs	0	0
Recoveries	0	0
Provision for loan and lease losses	(1,267)	421
Ending balance	4,517	7,474
Specific Reserve	0	0
General Allocation	4,517	7,474
Owner Occupied Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	2,604	4,413
Charged-offs	0	0
Recoveries	0	0
Provision for loan and lease losses	(384)	(2,490)
Ending balance	2,220	1,923
Specific Reserve	0	0
General Allocation	2,220	1,923
Consumer Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	5,301	5,163
Charged-offs	(478)	(264)
Recoveries	238	260
Provision for loan and lease losses	484	57
Ending balance	5,545	5,216
Specific Reserve	22	171
General Allocation	5,523	5,045
Purchased Credit Impaired Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,611	6,907
Charged-offs	(1,089)	(1,343)
Recoveries	705	1,224
Provision for loan and lease losses	18	(1,123)
Ending balance	3,245	5,665
Specific Reserve	0	0
General Allocation	3,245	5,665
Unallocated Financing Receivables [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,053	0
Charged-offs	0	0
Recoveries	0	0
Provision for loan and lease losses	(479)	321
Ending balance	574	321
Specific Reserve	0	0
General Allocation	$ 574	$ 321

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
	Mar. 31, 2019	Mar. 31, 2018
Allowance For Loan And Lease Losses And Unfunded Loan Commitments And Letters Of Credit
Beginning balance	$ 4,330	$ 3,130
Allowance for Loan and Lease Losses, Net Changes In Unfunded Commitments and Letters Of Credit Allowance	(550)	1,200
Ending balance	$ 3,780	$ 4,330

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	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: ALLL	$ 83,274	$ 83,369	$ 79,827	$ 75,646
Loans, net	8,437,524	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	8,432,541	8,301,751
Less: ALLL	80,029	79,758
Loans, net	8,352,512	8,221,993
Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	94,418	96,285
Acquisition Accounting Valuation Discount on Purchased Credit Impaired Loans	6,161	6,525
Less: ALLL	3,245	3,611
Loans, net	85,012	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	8,151,232	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	85,562	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	76,701	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	141	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	204,608	166,239
Substandard [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	8,715	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	43,617	43,188	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	3,381,234	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	9,553	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	3,217,555	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	8,749	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	58,919	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	0	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	104,760	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	804	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	2,495	2,626	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	115,217	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	717	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	115,089	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	717	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	26	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	102	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]
Less: ALLL	616	593	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	282,330	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	9,258	9,848
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	281,107	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	8,565	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	1,223	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	693	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	4,588	3,947	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	294,920	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	10,186	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	286,993	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	9,974	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	2,472	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	141	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	5,455	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	71	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	5,018	4,044	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	1,962,609	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	19,350	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	1,918,999	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	19,350	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	1,560	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	42,050	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	4,966	4,533	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	1,638,559	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	35,422	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	1,578,780	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	28,662	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	13,724	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	46,055	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	6,760	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	407	549	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	3,619	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	147	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	3,619	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	146	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	1	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	5,466	5,536	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	203,318	212,396
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	203,318	212,225
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] | 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] | 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] | 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]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: ALLL	4,517	5,784	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	163,674	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	491	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	163,674	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	491	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	2,220	2,604	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	74,736	87,063
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	74,148	87,063
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] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	588	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] | 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]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: ALLL	5,545	5,301	$ 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	312,325	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	9,294	9,765
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	307,950	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	8,908	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	4,375	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	386	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
	Mar. 31, 2019	Mar. 31, 2018
Other Real Estate Owned [Line Items]
Balance, beginning of period	$ 6,019	$ 13,298
Transfers in	386	406
Valuation adjustments	(195)	(92)
Proceeds from Sale of OREO Property	121	2,062
Loss on sale of OREO, net	(14)	(43)
Total OREO, end of period	6,075	$ 11,507
Mortgage Loans in Process of Foreclosure, Amount	678
One-to-Four Family Residential [Member]
Other Real Estate Owned [Line Items]
Total OREO, end of period	$ 311

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets (Schedule of Goodwill and Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 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
CDI current period amortization	(2,748)	(3,188)
Indefinite-lived Intangible Assets (Excluding Goodwill)	919	919
Other intangible assets, net	43,189	54,985	$ 45,937
Total goodwill and intangible assets, end of period	$ 809,031	820,827
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
Accumulated amortization at beginning of period			$ (60,455)	$ (48,219)
Core deposit intangible, net, beginning of period	$ 45,018	57,254
CDI current period amortization	(2,748)	(3,188)
Total core deposit intangible, end of period	$ 42,270	$ 54,066

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets (Estimated Future Amortization Expense of Core Deposit Intangibles) (Details) $ in Thousands	Mar. 31, 2019USD ($)
Future Amortization Expense For Core Deposit Intangibles
2019	$ 7,731
2020	8,724
2021	7,264
2022	5,880
2023	$ 4,552

Subordinated debentures (Detail

Subordinated debentures (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Nov. 01, 2017
Subordinated Borrowing [Line Items]
Subordinated Borrowing, Interest Rate	5.875%
Pacific Continental [Member]
Subordinated Borrowing [Line Items]
Business Combination, Purchase Price Allocation, Subordinated Debt		$ 35
Subordinated Debt [Member]
Subordinated Borrowing [Line Items]
Debt Instrument, Basis Spread on Variable Rate	4.715%

Junior subordinated debt (Detai

Junior subordinated debt (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2017	Nov. 01, 2017
Junior subordinated debentures [Line Items]
Repayments of junior subordinated debt	$ 0	$ 8,248	$ 6,200
Pacific Continental [Member]
Junior subordinated debentures [Line Items]
Business Combination, Purchase Price Allocation, Junior Subordinated Debentures				$ 14,400

Derivatives and Balance Sheet_3

Derivatives and Balance Sheet Offsetting (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Derivative [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	$ 0
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	23,018
Secured Borrowings, Gross, Difference, Amount	0
Gain (Loss) on Interest Rate Cash Flow Hedge Ineffectiveness	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	23,018
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	23,018
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
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
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
Not Designated as Hedging Instrument [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Derivative, Notional Amount	369,800		$ 366,700
Gain (Loss) on Derivative Instruments, Net, Pretax		$ 6
Not Designated as Hedging Instrument [Member] | Other Assets [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Fair value of asset derivative instruments	8,815		7,033
Not Designated as Hedging Instrument [Member] | Other Liabilities [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Fair value of liability derivative instruments	8,815		7,033
Designated as Hedging Instrument [Member] | Interest rate collar [Domain]
Derivative [Line Items]
Derivative, Notional Amount	500,000
Designated as Hedging Instrument [Member] | Other Assets [Member] | Interest rate collar [Domain]
Derivative [Line Items]
Fair value of asset derivative instruments	6,268		0
Designated as Hedging Instrument [Member] | Other Liabilities [Member] | Interest rate collar [Domain]
Derivative [Line Items]
Fair value of liability derivative instruments	$ 0		$ 0

Derivatives and Balance Sheet_4

Derivatives and Balance Sheet Offsetting Balance Sheet Offsetting (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Balance Sheet Offsetting [Line Items]
Document Period End Date	Mar. 31, 2019
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)	$ 6,268	$ 0
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement	23,018
Repurchase agreements, amounts offset in balance sheet	0		$ 0
Repurchase agreements, net amount presented in statement of financial position	23,018		61,094
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities	(23,018)		(61,094)
Securities sold under agreements to repurchase, amount not offset	0		0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	0	$ 0
Interest Rate Contracts [Member]
Balance Sheet Offsetting [Line Items]
Derivative Assets, Gross Amounts Offset in the Balance Sheets	0		0
Derivative Asset	8,815		7,033
Derivative, Collateral, Obligation to Return Securities	0		0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	8,815		7,033
Derivative Liability, Gross Amounts Offset in Balance Sheets	0		0
Derivative Liability	8,815		7,033
Derivative, Collateral, Right to Reclaim Securities	(5,573)		(3,235)
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	3,242		3,798
Interest rate collar [Domain]
Balance Sheet Offsetting [Line Items]
Derivative Assets, Gross Amounts Offset in the Balance Sheets	0
Derivative Asset	6,268
Derivative, Collateral, Obligation to Return Securities	0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	6,268
Available-for-sale Securities [Member]
Balance Sheet Offsetting [Line Items]
Securities Sold under Agreements to Repurchase, Gross	23,018		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	8,815		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	8,815		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	6,268		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
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	23,018
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	$ 23,018

Commitments and Contingent Li_3

Commitments and Contingent Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Other Commitments [Line Items]
Operating Lease, Right-of-Use Asset	$ 48,211
Operating Lease, Liability	$ 54,246
Operating Lease, Weighted Average Remaining Lease Term	7 years 8 months 12 days
Operating Lease, Weighted Average Discount Rate, Percent	3.20%
Operating Lease, Payments	$ 2,800
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	1,400
Operating Lease, Cost	2,820
Variable Lease, Cost	506
Sublease Income	(315)
Lease, Cost	3,011
Commitments to Extend Credit [Member]
Other Commitments [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	2,660,000	$ 2,620,000
Standby Letters of Credit [Member]
Other Commitments [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	27,600	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	$ 0	$ 0

Future minimum payments for ope

Future minimum payments for operating leases (Details) $ in Thousands	Mar. 31, 2019USD ($)
Commitments and Contingencies Disclosure [Abstract]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	$ 8,297
Lessee, Operating Lease, Liability, Payments, Due Year Two	9,920
Lessee, Operating Lease, Liability, Payments, Due Year Three	8,883
Lessee, Operating Lease, Liability, Payments, Due Year Four	8,256
Lessee, Operating Lease, Liability, Payments, Due Year Five	6,949
Lessee, Operating Lease, Liability, Payments, Due after Year Five	19,561
Lessee, Operating Lease, Liability, Payments, Due	61,866
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	7,620
Operating Lease, Liability	$ 54,246

Commitments and Contingent Li_4

Commitments and Contingent Liabilities Prior disclosed minimum lease payments schedule (Details) $ in Thousands	Dec. 31, 2018USD ($)
Leases ASC 840 [Abstract]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 10,947
Operating Leases, Future Minimum Payments, Due in Two Years	9,766
Operating Leases, Future Minimum Payments, Due in Three Years	8,729
Operating Leases, Future Minimum Payments, Due in Four Years	8,102
Operating Leases, Future Minimum Payments, Due in Five Years	6,796
Operating Leases, Future Minimum Payments, Due Thereafter	18,703
Operating Leases, Future Minimum Payments Due	$ 63,043

Shareholders' Equity (Details)

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

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Changes in AOCI by Component) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019		Mar. 31, 2018		Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance		$ (35,305)		$ (22,225)
Other comprehensive income before reclassifications	[1]	36,873		(26,048)
Amounts reclassified from accumulated other comprehensive loss (2)	[1]	1,478		(17)
Net current-period other comprehensive income	[1]	38,351		(26,065)
Ending balance		3,046		(48,133)
Unrealized Gains and Losses on Available-for-Sale Debt Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance		(33,128)		(19,779)
Other comprehensive income before reclassifications	[1]	32,063		(26,048)
Amounts reclassified from accumulated other comprehensive loss (2)		1,417	[2]	(78)	[1]
Net current-period other comprehensive income	[1]	33,480		(26,126)
Ending balance		352		(45,748)
Unrealized Gains and Losses on Pension Plan Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance		(2,177)		(2,446)
Other comprehensive income before reclassifications	[1]	0		0
Amounts reclassified from accumulated other comprehensive loss (2)	[1]	61		61
Net current-period other comprehensive income	[1]	61		61
Ending balance		(2,116)		(2,385)
Unrealized gains and losses on cash flow hedge
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance		0		0
Other comprehensive income before reclassifications	[1]	4,810		0
Amounts reclassified from accumulated other comprehensive loss (2)	[2]	0		0
Net current-period other comprehensive income	[1]	4,810		0
Ending balance		$ 4,810		$ 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)
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						$ 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
	Mar. 31, 2019	Mar. 31, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Investment securities gains, net	$ 1,847	$ 22
Total before tax	56,656	46,785
Income tax provision	(10,785)	(6,815)
Compensation and employee benefits	52,085	50,570
Net income	45,871	39,970
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	(1,847)	102
Total before tax	(1,847)	102
Income tax provision	430	(24)
Net income	(1,417)	78
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)
Income tax provision	19	19
Compensation and employee benefits	(80)	(80)
Net income	$ (61)	$ (61)

Fair Value Accounting and Mea_3

Fair Value Accounting and Measurement (Financial Assets And Liabilities Accounted for Fair Value On Recurring Basis) (Details) - USD ($)	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 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, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	3,027,270,000	$ 3,167,448,000
Other assets (Interest rate contracts)	8,815,000	7,033,000
Interest Rate Cash Flow Hedge Asset at Fair Value	6,268,000
Other liabilities (Interest rate contracts)	8,815,000	7,033,000
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, 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, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	3,027,021,000	3,167,200,000
Other assets (Interest rate contracts)	8,815,000	7,033,000
Interest Rate Cash Flow Hedge Asset at Fair Value	6,268,000
Other liabilities (Interest rate contracts)	8,815,000	7,033,000
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, 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, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	2,155,614,000	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, Measurements, 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, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	2,155,614,000	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, Measurements, 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, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	536,490,000	574,323,000
State and Municipal Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, 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, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	536,490,000	574,323,000
State and Municipal Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, 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, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	334,917,000	404,587,000
U.S. Government Agency [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, 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, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	334,917,000	404,587,000
U.S. Government Agency [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, 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, Measurements, 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, Measurements, 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, Measurements, 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, Measurements, 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, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 3,840	$ 7,820
Fair Value, Option, Changes in Fair Value, Gain (Loss)	2,792	5,109
Other Real Estate Owned, Fair Value Disclosure	530	160
Assets, Fair Value Disclosure	4,370	7,980
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Other Real Estate Owned, Fair Value Disclosure	0	0
Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Other Real Estate Owned, Fair Value Disclosure	0	0
Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	3,840	7,820
Other Real Estate Owned, Fair Value Disclosure	530	160
Assets, Fair Value Disclosure	4,370	7,980
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)	2,597	5,058
Other Real Estate Owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	$ 195	$ 51

Fair Value Accounting and Mea_5

Fair Value Accounting and Measurement (Quantitative Information About Level 3 Fair Value Measurements) (Details)	Mar. 31, 2019USD ($)	Mar. 31, 2018USD ($)
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, Measurements, Nonrecurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired loans	3,840,000	7,820,000
Other Real Estate Owned, Fair Value Disclosure	530,000	160,000
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired loans	3,840,000	7,820,000
Other Real Estate Owned, Fair Value Disclosure	530,000	160,000
Collateral Pledged [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired loans	$ 3,840,000	$ 7,512,000
Collateral Pledged [Member] | Valuation, Market Approach [Member] | Impaired Loans [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, 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, Measurements, Nonrecurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired Loans, Measurement Input	1	1
Collateral Pledged [Member] | Valuation, Market Approach [Member] | Impaired Loans [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired Loans, Measurement Input	0.4453	0.4133
Uncollateralized [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired loans		$ 308,000
Uncollateralized [Member] | Valuation, Market Approach [Member] | Impaired Loans [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired Loans, Measurement Input		0.0600
Uncollateralized [Member] | Valuation, Market Approach [Member] | Impaired Loans [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired Loans, Measurement Input		0.0600
Uncollateralized [Member] | Valuation, Market Approach [Member] | Impaired Loans [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired Loans, Measurement Input		0.0600

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	Mar. 31, 2019	Dec. 31, 2018
Assets
Interest-earning deposits with banks	$ 33,482	$ 17,407
Debt securities available for sale	3,027,270	3,167,448
Estimate of Fair Value Measurement [Member]
Assets
Cash and due from banks	178,591	260,180
Interest-earning deposits with banks	33,482	17,407
Debt securities available for sale	3,027,270	3,167,448
FHLB stock	25,960	25,960
Loans held for sale	4,017	3,849
Loans	8,541,649	8,316,946
Interest rate contracts	8,815	7,033
Interest Rate Cash Flow Hedge Asset at Fair Value	6,268
Liabilities
Deposits	406,652	407,659
FHLB Advances	390,988	400,085
Repurchase agreements	23,018	61,094
Subordinated Debt Obligations, Fair Value Disclosure	36,053	34,897
Interest rate contracts	8,815	7,033
Reported Value Measurement [Member]
Assets
Cash and due from banks	178,591	260,180
Interest-earning deposits with banks	33,482	17,407
Debt securities available for sale	3,027,270	3,167,448
FHLB stock	25,600	25,960
Loans held for sale	4,017	3,849
Loans	8,437,524	8,308,142
Interest rate contracts	8,815	7,033
Interest Rate Cash Flow Hedge Asset at Fair Value	6,268
Liabilities
Deposits	411,945	414,443
FHLB Advances	390,510	399,523
Repurchase agreements	23,018	61,094
Subordinated Debt Obligations, Fair Value Disclosure	35,416	35,462
Interest rate contracts	8,815	7,033
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member]
Assets
Cash and due from banks	178,591	260,180
Interest-earning deposits with banks	33,482	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	3,027,021	3,167,200
FHLB stock	25,960	25,960
Loans held for sale	4,017	3,849
Loans	0	0
Interest rate contracts	8,815	7,033
Interest Rate Cash Flow Hedge Asset at Fair Value	6,268
Liabilities
Deposits	406,652	407,659
FHLB Advances	390,988	400,085
Repurchase agreements	23,018	61,094
Subordinated Debt Obligations, Fair Value Disclosure	36,053	34,897
Interest rate contracts	8,815	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	8,541,649	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
	Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net Income	$ 45,871	$ 39,970
Earnings allocated to participating securities - nonvested restricted shares	456	437
Earnings allocated to common shareholders, Basic	$ 45,415	$ 39,533
Weighted average common shares outstanding	72,521	72,300
Basic earnings per common share	$ 0.63	$ 0.55
Earnings allocated to common shareholders, Diluted	$ 45,415	$ 39,533
Dilutive effect of equity awards and warrants	3	5
Weighted average diluted common shares outstanding	72,524	72,305
Diluted earnings per common share	$ 0.63	$ 0.55
Potentially dilutive share options that were not included in the computation of diluted EPS because to do so would be anti-dilutive.	0	12

Revenue from Contracts with C_3

Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenue from Contract with Customer [Abstract]
Deposit account and treasury management fees	$ 8,980	$ 8,740
Card revenue	3,662	5,813
Financial services and trust revenue	2,957	2,730
Revenue from contracts with customers	15,599	17,283
Noninterest income, excluding revenue from contracts with customers	6,097	5,860
Noninterest Income	$ 21,696	$ 23,143