Bank of Hawaii (BOH) 10-Q 28 Oct 19 2019 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2019	Oct. 22, 2019
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2019
Document Transition Report	false
Entity File Number	1-6887
Entity Registrant Name	BANK OF HAWAII CORP
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	99-0148992
Entity Address, Address Line One	130 Merchant Street
Entity Address, City or Town	Honolulu
Entity Address, State or Province	HI
Entity Address, Postal Zip Code	96813
City Area Code	888
Local Phone Number	643-3888
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		40,274,021
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Entity Central Index Key	0000046195
Current Fiscal Year End Date	--12-31
Amendment Flag	false
NEW YORK STOCK EXCHANGE, INC. [Member]
Entity Information [Line Items]
Title of 12(b) Security	Common Stock
Trading Symbol	BOH
Security Exchange Name	NYSE

Consolidated Statements of Inco

Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Interest Income
Interest and Fees on Loans and Leases	$ 110,877	$ 104,248	$ 329,789	$ 303,193
Income on Investment Securities
Available-for-Sale	17,512	12,588	46,016	37,109
Held-to-Maturity	18,796	20,821	62,866	62,828
Deposits	9	10	33	24
Funds Sold	656	1,393	2,830	2,996
Other	233	364	762	1,005
Total Interest Income	148,083	139,424	442,296	407,155
Interest Expense
Deposits	18,055	10,931	51,967	27,971
Securities Sold Under Agreements to Repurchase	4,257	4,667	13,451	13,848
Funds Purchased	146	33	815	169
Short-Term Borrowings	1	28	38	57
Other Debt	728	838	2,195	2,731
Total Interest Expense	23,187	16,497	68,466	44,776
Net Interest Income	124,896	122,927	373,830	362,379
Provision for Credit Losses	4,250	3,800	11,250	11,425
Net Interest Income After Provision for Credit Losses	120,646	119,127	362,580	350,954
Noninterest Income
Trust and Asset Management	10,930	10,782	33,076	33,319
Mortgage Banking	4,864	1,965	10,487	6,289
Service Charges on Deposit Accounts	7,592	7,255	22,239	21,249
Fees, Exchange, and Other Service Charges	14,900	14,173	43,360	42,906
Investment Securities Gains (Losses), Net	(1,469)	(729)	(3,080)	(3,097)
Annuity and Insurance	1,278	1,360	5,662	4,413
Bank-Owned Life Insurance	1,647	1,620	5,136	5,258
Other	6,765	5,056	18,756	16,478
Total Noninterest Income	46,507	41,482	135,636	126,815
Noninterest Expense
Salaries and Benefits	54,345	51,782	164,442	158,352
Net Occupancy	8,803	8,702	24,976	25,824
Net Equipment	7,637	6,116	21,365	17,488
Data Processing	4,676	4,241	13,929	12,695
Professional Fees	2,184	2,206	6,814	7,525
FDIC Insurance	1,257	2,057	3,816	6,396
Other	21,447	15,434	50,789	47,433
Total Noninterest Expense	100,349	90,538	286,131	275,713
Income Before Provision for Income Taxes	66,804	70,071	212,085	202,056
Provision for Income Taxes	14,752	13,138	44,315	36,365
Net Income	$ 52,052	$ 56,933	$ 167,770	$ 165,691
Basic Earnings Per Share (in dollars per share)	$ 1.30	$ 1.37	$ 4.14	$ 3.96
Diluted Earnings Per Share (in dollars per share)	1.29	1.36	4.11	3.93
Dividends Declared Per Share (in dollars per share)	$ 0.65	$ 0.60	$ 1.92	$ 1.72
Basic Weighted Average Shares (in shares)	40,190,508	41,620,776	40,554,036	41,846,080
Diluted Weighted Average Shares (in shares)	40,450,742	41,899,401	40,806,295	42,133,776

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net Income	$ 52,052	$ 56,933	$ 167,770	$ 165,691
Other Comprehensive Income (Loss), Net of Tax:
Net Unrealized Gains (Losses) on Investment Securities	5,405	(5,599)	28,533	(17,694)
Defined Benefit Plans	245	216	736	648
Total Other Comprehensive Income (Loss)	5,650	(5,383)	29,269	(17,046)
Comprehensive Income	$ 57,702	$ 51,550	$ 197,039	$ 148,645

Consolidated Statements of Cond

Consolidated Statements of Condition (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Assets
Interest-Bearing Deposits in Other Banks	$ 2,946	$ 3,028
Funds Sold	108,446	198,860
Investment Securities
Available-for-Sale	2,594,394	2,007,942
Held-to-Maturity (Fair Value of $2,972,273 and $3,413,994)	2,946,910	3,482,092
Loans Held for Sale	36,720	10,987
Loans and Leases	10,881,298	10,448,774
Allowance for Loan and Lease Losses	(108,936)	(106,693)
Net Loans and Leases	10,772,362	10,342,081
Total Earning Assets	16,461,778	16,044,990
Cash and Due From Banks	259,492	324,081
Premises and Equipment, Net	179,453	151,837
Operating lease right-of-use assets	101,005	0
Accrued Interest Receivable	47,897	51,230
Foreclosed Real Estate	2,939	1,356
Mortgage Servicing Rights	24,408	24,310
Goodwill	31,517	31,517
Bank-Owned Life Insurance	286,936	283,771
Other Assets	276,715	230,882
Total Assets	17,672,140	17,143,974
Deposits
Noninterest-Bearing Demand	4,392,706	4,739,596
Interest-Bearing Demand	3,000,865	3,002,925
Savings	6,141,098	5,539,199
Time	1,806,083	1,745,522
Total Deposits	15,340,752	15,027,242
Short-Term Borrowings	0	199
Securities Sold Under Agreements to Repurchase	604,299	504,296
Other Debt	110,585	135,643
Operating lease liabilities	108,264	0
Retirement Benefits Payable	39,682	40,494
Accrued Interest Payable	8,435	8,253
Taxes Payable and Deferred Taxes	21,089	19,736
Other Liabilities	147,544	139,911
Total Liabilities	16,380,650	15,875,774
Shareholders’ Equity
Common Stock ($.01 par value; authorized 500,000,000 shares; issued / outstanding: September 30, 2019 - 58,176,305 / 40,359,259 June 30, 2019 - 58,175,367 / 40,687,719; December 31, 2018 - 58,063,689 / 41,499,898; and September 30, 2018 - 58,070,578 / 41,809,551)	579	577
Capital Surplus	580,200	571,704
Accumulated Other Comprehensive Loss	(21,774)	(51,043)
Retained Earnings	1,730,437	1,641,314
Treasury Stock, at Cost (Shares: September 30, 2019 - 17,817,046; June 30, 2019 - 17,487,648; December 31, 2018 - 16,563,791; and September 30, 2018 - 16,261,027)	(997,952)	(894,352)
Total Shareholders’ Equity	1,291,490	1,268,200
Total Liabilities and Shareholders’ Equity	$ 17,672,140	$ 17,143,974

Consolidated Statements of Co_2

Consolidated Statements of Condition (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Held-to-Maturity: Fair Value	$ 2,972,273	$ 3,413,994
Common Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, authorized (in shares)	500,000,000	500,000,000
Common Stock, issued (in shares)	58,176,305	58,063,689
Common Stock, outstanding (in shares)	40,359,259	41,499,898
Treasury Stock (in shares)	17,817,046	16,563,791

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Capital Surplus	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Treasury Stock
Balance at Beginning of Period at Dec. 31, 2017	$ 1,231,868	$ 576	$ 561,161	$ (34,715)	$ 1,512,218	$ (807,372)
Beginning Balance (in shares) at Dec. 31, 2017		42,401,443
Increase (decrease) in shareholders' equity
Net Income	54,040				54,040
Other Comprehensive Income	(8,905)			(8,905)
Reclassification of the Income Tax Effect of the Tax Reform from AOCI to RE	0			(7,477)	7,477
Share-Based Compensation	1,867		1,867
Common Stock Issued under Purchase and Equity Compensation Plans	1,951	$ 1	570		252	1,128
Common Stock Issued under Purchase and Equity Compensation Plans and Related Tax Benefits (in shares)		121,299
Common Stock Repurchased	(17,541)					(17,541)
Common Stock Repurchased (in shares)		(208,328)
Cash Dividends Declared (per share)	(22,087)				(22,087)
Balance at End of Period at Mar. 31, 2018	1,241,193	$ 577	563,598	(51,097)	1,551,900	(823,785)
Ending Balance (in shares) at Mar. 31, 2018		42,314,414
Balance at Beginning of Period at Dec. 31, 2017	1,231,868	$ 576	561,161	(34,715)	1,512,218	(807,372)
Beginning Balance (in shares) at Dec. 31, 2017		42,401,443
Increase (decrease) in shareholders' equity
Net Income	165,691
Other Comprehensive Income	(17,046)			(17,046)
Reclassification of the Income Tax Effect of the Tax Reform from AOCI to RE				(7,477)
Balance at End of Period at Sep. 30, 2018	1,253,327	$ 577	569,223	(59,238)	1,612,998	(870,233)
Ending Balance (in shares) at Sep. 30, 2018		41,809,551
Balance at Beginning of Period at Mar. 31, 2018	1,241,193	$ 577	563,598	(51,097)	1,551,900	(823,785)
Beginning Balance (in shares) at Mar. 31, 2018		42,314,414
Increase (decrease) in shareholders' equity
Net Income	54,718				54,718
Other Comprehensive Income	(2,758)			(2,758)
Share-Based Compensation	2,188		2,188
Common Stock Issued under Purchase and Equity Compensation Plans	2,428	$ 0	650		(86)	1,864
Common Stock Issued under Purchase and Equity Compensation Plans and Related Tax Benefits (in shares)		58,345
Common Stock Repurchased	(24,688)					24,688
Common Stock Repurchased (in shares)		(288,693)
Cash Dividends Declared (per share)	(25,364)				(25,364)
Balance at End of Period at Jun. 30, 2018	1,247,717	$ 577	566,436	(53,855)	1,581,168	(846,609)
Ending Balance (in shares) at Jun. 30, 2018		42,084,066
Increase (decrease) in shareholders' equity
Net Income	56,933				56,933
Other Comprehensive Income	(5,383)			(5,383)
Share-Based Compensation	2,153		2,153
Common Stock Issued under Purchase and Equity Compensation Plans	1,854	$ 0	634		85	1,135
Common Stock Issued under Purchase and Equity Compensation Plans and Related Tax Benefits (in shares)		23,645
Common Stock Repurchased	(24,759)					24,759
Common Stock Repurchased (in shares)		(298,160)
Cash Dividends Declared (per share)	(25,188)				(25,188)
Balance at End of Period at Sep. 30, 2018	1,253,327	$ 577	569,223	(59,238)	1,612,998	(870,233)
Ending Balance (in shares) at Sep. 30, 2018		41,809,551
Balance at Beginning of Period at Dec. 31, 2018	$ 1,268,200	$ 577	571,704	(51,043)	1,641,314	(894,352)
Beginning Balance (in shares) at Dec. 31, 2018	41,499,898	41,499,898
Increase (decrease) in shareholders' equity
Net Income	$ 58,799				58,799
Other Comprehensive Income	7,165			7,165
Share-Based Compensation	2,274		2,274
Common Stock Issued under Purchase and Equity Compensation Plans	2,087	$ 1	616		(203)	1,673
Common Stock Issued under Purchase and Equity Compensation Plans and Related Tax Benefits (in shares)		131,529
Common Stock Repurchased	(43,189)					(43,189)
Common Stock Repurchased (in shares)		(552,739)
Cash Dividends Declared (per share)	(25,646)				(25,646)
Balance at End of Period at Mar. 31, 2019	1,269,690	$ 578	574,594	(43,878)	1,674,264	(935,868)
Ending Balance (in shares) at Mar. 31, 2019		41,078,688
Balance at Beginning of Period at Dec. 31, 2018	$ 1,268,200	$ 577	571,704	(51,043)	1,641,314	(894,352)
Beginning Balance (in shares) at Dec. 31, 2018	41,499,898	41,499,898
Increase (decrease) in shareholders' equity
Net Income	$ 167,770
Other Comprehensive Income	29,269			29,269
Balance at End of Period at Sep. 30, 2019	$ 1,291,490	$ 579	580,200	(21,774)	1,730,437	(997,952)
Ending Balance (in shares) at Sep. 30, 2019	40,359,259	40,359,259
Balance at Beginning of Period at Mar. 31, 2019	$ 1,269,690	$ 578	574,594	(43,878)	1,674,264	(935,868)
Beginning Balance (in shares) at Mar. 31, 2019		41,078,688
Increase (decrease) in shareholders' equity
Net Income	56,919				56,919
Other Comprehensive Income	16,454			16,454
Share-Based Compensation	2,164		2,164
Common Stock Issued under Purchase and Equity Compensation Plans	2,262	$ 1	588		365	1,308
Common Stock Issued under Purchase and Equity Compensation Plans and Related Tax Benefits (in shares)		43,180
Common Stock Repurchased	(34,986)					(34,986)
Common Stock Repurchased (in shares)		(434,149)
Cash Dividends Declared (per share)	(26,555)				(26,555)
Balance at End of Period at Jun. 30, 2019	1,285,948	$ 579	577,346	(27,424)	1,704,993	(969,546)
Ending Balance (in shares) at Jun. 30, 2019		40,687,719
Increase (decrease) in shareholders' equity
Net Income	52,052				52,052
Other Comprehensive Income	5,650			5,650
Share-Based Compensation	2,224		2,224
Common Stock Issued under Purchase and Equity Compensation Plans	1,653	$ 0	630		(271)	1,294
Common Stock Issued under Purchase and Equity Compensation Plans and Related Tax Benefits (in shares)		26,275
Common Stock Repurchased	(29,700)					(29,700)
Common Stock Repurchased (in shares)		(354,735)
Cash Dividends Declared (per share)	(26,337)				(26,337)
Balance at End of Period at Sep. 30, 2019	$ 1,291,490	$ 579	$ 580,200	$ (21,774)	$ 1,730,437	$ (997,952)
Ending Balance (in shares) at Sep. 30, 2019	40,359,259	40,359,259

Consolidated Statements of Sh_2

Consolidated Statements of Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Stockholders' Equity [Abstract]
Dividends Declared Per Share (in dollars per share)	$ 0.65	$ 0.65	$ 620	$ 0.60	$ 0.60	$ 520	$ 1.92	$ 1.72

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Operating Activities
Net Income	$ 52,052	$ 58,799	$ 56,933	$ 54,040	$ 167,770	$ 165,691
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Provision for Credit Losses	4,250		3,800		11,250	11,425
Depreciation and Amortization					12,685	10,512
Amortization of Deferred Loan and Lease Fees					(85)	(330)
Amortization and Accretion of Premiums/Discounts on Investment Securities, Net					15,102	25,633
Amortization of Operating Lease Right-of-Use Assets					9,495	0
Share-Based Compensation					6,662	6,208
Benefit Plan Contributions					(1,472)	(1,352)
Deferred Income Taxes					(5,805)	(6,557)
Gains on Sale of Premises and Equipment					(558)	0
Net Gains on Sales of Loans and Leases					(3,705)	(2,642)
Net Losses (Gains) on Sales of Investment Securities					3,080	3,097
Proceeds from Sales of Loans Held for Sale					299,062	215,897
Originations of Loans Held for Sale					(322,721)	(214,047)
Net Tax Benefits from Share-Based Compensation					693	985
Net Change in Other Assets and Other Liabilities					(38,710)	(5,148)
Net Cash Provided by Operating Activities					152,743	209,372
Investment Securities Available-for-Sale:
Proceeds from Sales, Prepayments and Maturities					1,656,241	287,744
Purchases					(1,203,633)	(147,694)
Investment Securities Held-to-Maturity:
Proceeds from Prepayments and Maturities					518,822	653,488
Purchases					(1,006,455)	(399,346)
Net Change in Loans and Leases					(441,007)	(444,529)
Purchases of Premises and Equipment					(40,381)	(22,514)
Proceeds from Sale of Premises and Equipment					639	0
Net Cash Used in Investing Activities					(515,774)	(72,851)
Financing Activities
Net Change in Deposits					313,510	(40,634)
Net Change in Short-Term Borrowings					99,804	(371)
Repayments of Long-Term Debt					(25,058)	(75,000)
Proceeds from Issuance of Common Stock					6,103	6,233
Repurchase of Common Stock					(107,875)	(66,998)
Cash Dividends Paid					(78,538)	(72,639)
Net Cash Provided by (Used in) Financing Activities					207,946	(249,409)
Net Change in Cash and Cash Equivalents					(155,085)	(112,888)
Cash and Cash Equivalents at Beginning of Period		$ 525,969		$ 447,851	525,969	447,851
Cash and Cash Equivalents at End of Period	370,884		$ 334,963		370,884	334,963
Supplemental Information
Cash Paid for Interest					68,284	44,033
Cash Paid for Income Taxes					43,905	32,403
Non-Cash Investing and Financing Activities:
Initial Recognition of Operating Lease Right-of-Use Assets	101,005				101,005
Initial Recognition of Operating Lease Liabilities	$ 108,264				108,264
Transfer from Investment Securities Held-To-Maturity to Investment Securities Available-For-Sale					1,014,859		$ 0
Transfer from Loans to Foreclosed Real Estate					$ 2,070	$ 2,592

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation Bank of Hawaii Corporation (the “Parent”) is a Delaware corporation and a bank holding company headquartered in Honolulu, Hawaii. Bank of Hawaii Corporation and its subsidiaries (collectively, the “Company”) provide a broad range of financial products and services to customers in Hawaii, Guam, and other Pacific Islands. The accompanying consolidated financial statements include the accounts of the Parent and its subsidiaries. The Parent’s principal operating subsidiary is Bank of Hawaii (the “Bank”). The consolidated financial statements in this report have not been audited by an independent registered public accounting firm, but, in the opinion of management, reflect all adjustments necessary for a fair presentation of the results for the interim periods. All such adjustments are of a normal recurring nature. Intercompany accounts and transactions have been eliminated in consolidation. Certain prior period information has been reclassified to conform to the current period presentation. Operating results for the interim periods disclosed herein are not necessarily indicative of the results that may be expected for the full fiscal year or for any future period. The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and accompanying notes required by GAAP for complete financial statements and should be read in conjunction with the audited consolidated financial statements and related notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 . Use of Estimates in the Preparation of Financial Statements The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts in the financial statements and accompanying notes. Actual results may differ from those estimates and such differences could be material to the financial statements. Variable Interest Entities Variable interests are defined as contractual ownership or other interests in an entity that change with fluctuations in an entity’s net asset value. The primary beneficiary consolidates the variable interest entity (“VIE”). The primary beneficiary is defined as the enterprise that has both (i) the power to direct the activities of the VIE that most significantly impact the entity’s economic performance and (ii) the obligation to absorb losses or the right to receive benefits that could be significant to the VIE. The Company participates in limited partnerships or limited liability companies that sponsor low-income housing projects. These entities provide funds for the construction and operation of apartment complexes that provide affordable housing to lower-income households. If these developments successfully attract a specified percentage of residents falling in that lower-income range, state and/or federal income tax credits are made available to the partners. The tax credits are generally recognized over 10 years for federal and 5 years for state. In order to continue receiving the tax credits each year over the life of the entity, the low-income residency targets must be maintained. Prior to January 1, 2015, the Company utilized the effective yield method whereby the Company recognized tax credits generally over 10 years and amortized the initial cost of the investment to provide a constant effective yield over the period that tax credits are allocated to the Company. On January 1, 2015, the Company adopted ASU No. 2014-01, “Accounting for Investments in Qualified Affordable Housing Projects” prospectively for new investments. ASU No. 2014-01 permits reporting entities to make an accounting policy election to account for their investments in qualified affordable housing projects using the proportional amortization method if certain conditions are met. As permitted by ASU No. 2014-01, the Company elected to continue to utilize the effective yield method for investments made prior to January 1, 2015. Unfunded commitments to fund these low-income housing entities were $16.9 million and $15.2 million as of September 30, 2019 and December 31, 2018 , respectively. These unfunded commitments are unconditional and legally binding and are recorded in other liabilities in the consolidated statements of condition. See Note 6 Affordable Housing Projects Tax Credit Partnerships for more information. The Company also has limited partnership interests in solar energy tax credit partnership investments. These partnerships develop, build, own and operate solar renewable energy projects. Over the course of these investments, the Company expects to receive federal and state tax credits, tax-related benefits, and excess cash available for distribution, if any. The Company may be called to sell its interest in the limited partnerships through a call option once all investment tax credits have been recognized. Tax benefits associated with these investments are generally recognized over 6 years . Although these entities meet the definition of a VIE, the Company is not the primary beneficiary of the entities as the general partner has both the power to direct the activities that most significantly impact the economic performance of the entities and the obligation to absorb losses or the right to receive benefits that could be significant to the entities. While the partnership agreements allow the limited partners, through a majority vote, to remove the general partner, this right is not deemed to be substantive as the general partner can only be removed for cause. The investments in these entities are initially recorded at cost, which approximates the maximum exposure to loss as a result of the Company’s involvement with these unconsolidated entities. The balance of the Company’s investments in these entities was $81.2 million and $85.9 million as of September 30, 2019 and December 31, 2018 , respectively, and is included in other assets in the consolidated statements of condition. Accounting Standards Adopted in 2019 In February 2016, the FASB issued ASU No. 2016-02, “Leases.” Under the new guidance, lessees will be required to recognize the following for all leases (with the exception of short-term leases): 1) a lease liability, which is the present value of a lessee’s obligation to make lease payments, and 2) a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. Lessor accounting under the new guidance remains largely unchanged as it is substantially equivalent to existing guidance for sales-type leases, direct financing leases, and operating leases. Leveraged leases have been eliminated, although lessors can continue to account for existing leveraged leases using the current accounting guidance. Other limited changes were made to align lessor accounting with the lessee accounting model and the new revenue recognition standard . All entities will classify leases to determine how to recognize lease-related revenue and expense. Quantitative and qualitative disclosures will be required by lessees and lessors to meet the objective of enabling users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. The intention is to require enough information to supplement the amounts recorded in the financial statements so that users can understand more about the nature of an entity’s leasing activities. ASU No. 2016-02 is effective for interim and annual reporting periods beginning after December 15, 2018. All entities are required to use a modified retrospective approach for leases that exist or are entered into after the beginning of the earliest comparative period in the financial statements. As the Company elected the transition option provided in ASU No. 2018-11 (see below), the modified retrospective approach was applied on January 1, 2019 (as opposed to January 1, 2017). The Company also elected certain relief options offered in ASU 2016-02 including the package of practical expedients, the option not to separate lease and non-lease components and instead to account for them as a single lease component, and the option not to recognize right-of-use assets and lease liabilities that arise from short-term leases (i.e., leases with terms of twelve months or less). The Company did not elect the hindsight practical expedient, which allows entities to use hindsight when determining lease term and impairment of right-of-use assets. The Company has several lease agreements, such as branch locations, which are considered operating leases, and therefore, were not previously recognized on the Company’s consolidated statements of condition. The new guidance requires these lease agreements to be recognized on the consolidated statements of condition as a right-of-use asset and a corresponding lease liability. The new guidance did not have a material impact on the consolidated statements of income or the consolidated statements of cash flows. See Note 16 Leases for more information. In August 2017, the FASB issued ASU No. 2017-12, “Targeted Improvements to Accounting for Hedging Activities.” This ASU’s objectives are to (1) improve the transparency and understandability of information conveyed to financial statement users about an entity’s risk management activities by better aligning the entity’s financial reporting for hedging relationships with those risk management activities; and (2) reduce the complexity of and simplify the application of hedge accounting by preparers. ASU No. 2017-12 is effective for interim and annual reporting periods beginning after December 15, 2018. The Company currently does not designate any derivative financial instruments as formal hedging relationships, and therefore, does not currently utilize hedge accounting. As such, ASU No. 2017-12 did not impact the Company’s Consolidated Financial Statements. In July 2018, the FASB issued ASU No. 2018-11, “Leases - Targeted Improvements” to provide entities with relief from the costs of implementing certain aspects of the new leasing standard, ASU No. 2016-02. Specifically, under the amendments in ASU 2018-11: (1) entities may elect not to recast the comparative periods presented when transitioning to the new leasing standard, and (2) lessors may elect not to separate lease and non-lease components when certain conditions are met. The amendments have the same effective date as ASU 2016-02 (January 1, 2019 for the Company). The Company adopted ASU 2018-11 on its required effective date of January 1, 2019 and elected both transition options mentioned above. ASU 2018-11 did not have a material impact on the Company’s Consolidated Financial Statements. In December 2018, the FASB issued ASU No. 2018-20, “Narrow-Scope Improvements for Lessors.” This ASU (1) allows lessors to make an accounting policy election of presenting sales taxes and other similar taxes collected from lessees on a net basis, (2) requires a lessor to exclude lessor costs paid directly by a lessee to third parties on the lessor’s behalf and include lessor costs that are paid by the lessor and reimbursed by the lessee in the measurement of variable lease revenue and the associated expense, and (3) clarifies that when lessors allocate variable payments to lease and non-lease components they are required to follow the recognition guidance in the new leases standard for the lease component and other applicable guidance, such as the new revenue standard, for the non-lease component. The Company adopted ASU 2018-20 on its required effective date of January 1, 2019 and elected to present sales taxes and other similar taxes collected from lessees on a net basis as described in (1) above. ASU 2018-20 did not have a material impact on the Company’s Consolidated Financial Statements. In March 2019, the FASB issued ASU No. 2019-01, “Leases: Codification Improvements.” This ASU (1) states that for lessors that are not manufacturers or dealers, the fair value of the underlying asset is its cost, less any volume or trade discounts, as long as there is not a significant amount of time between acquisition of the asset and lease commencement; (2) clarifies that lessors in the scope of ASC 942 (such as the Company) must classify principal payments received from sales-type and direct financing leases in investing activities in the statement of cash flows; and (3) clarifies the transition guidance related to certain interim disclosures provided in the year of adoption. To coincide with the adoption of ASU No. 2016-02, the Company elected to early adopt ASU 2019-01 on January 1, 2019. The adoption of this ASU did not have a material impact on the Company’s Consolidated Financial Statements. In April 2019, the FASB issued ASU No. 2019-04, “Codification Improvements to Topic 326, Financial Instruments - Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments.” With respect to Topic 815, Derivatives and Hedging, ASU 2019-04 clarifies that the reclassification of a debt security from held-to-maturity (“HTM”) to available-for-sale (“AFS”) under the transition guidance in ASU 2017-12 would not (1) call into question the classification of other HTM securities, (2) be required to actually designate any reclassified security in a last-of-layer hedge, or (3) be restricted from selling any reclassified security. As part of the transition of ASU 2019-04, entities may reclassify securities that would qualify for designation as the hedged item in a last-of-layer hedging relationship from HTM to AFS; however, entities that already made such a reclassification upon their adoption of ASU 2017-12 are precluded from reclassifying additional securities. The Company did not reclassify any securities from HTM to AFS upon adoption of ASU 2017-12. The Company elected to early adopt the amendments to Topic 815 in June 2019. See Note 3 Investment Securities for more information regarding the impact of the transfer of certain HTM debt securities to AFS. The amendments and pending adoption to Topics 326 and 825 are described in the section below. Accounting Standards Pending Adoption In June 2016, the FASB issued ASU No. 2016-13, “Measurement of Credit Losses on Financial Instruments.” This ASU significantly changes how entities will measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. The standard will replace today’s “incurred loss” approach with an “expected loss” approach known as current expected credit loss (“CECL”), which will apply to: (1) financial assets subject to credit losses and measured at amortized cost, and (2) certain off-balance sheet credit exposures. This includes, but is not limited to, loans, leases, held-to-maturity securities, loan commitments, and financial guarantees. The CECL approach will not apply to AFS debt securities. For AFS debt securities with unrealized losses, entities will measure credit losses in a manner similar to what they do today, except that the credit losses will be recognized as allowances rather than reductions in the amortized cost of the securities. As a result, entities will recognize improvements to estimated credit losses immediately in earnings rather than as interest income over time, as they do today. The ASU also simplifies the accounting model for purchased credit-impaired debt securities and loans. ASU 2016-13 also expands the disclosure requirements regarding an entity’s assumptions, models, and methods for estimating the reserve for credit losses. In addition, entities will need to disclose the amortized cost balance for each class of financial asset by credit quality indicator, disaggregated by the year of origination. ASU No. 2016-13 is effective for interim and annual reporting periods beginning after December 15, 2019 and the Company is planning to adopt the standard in the first quarter of 2020. Entities will apply the standard’s provisions as a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective (i.e., modified retrospective approach). The Company is continuing its implementation efforts through its Company-wide implementation team. This team has assigned roles and responsibilities, key tasks to complete, and a general timeline to be followed. The team meets periodically to discuss the latest developments and ensure progress is being made. The team has been working with an advisory consultant and has finalized and documented the methodologies that will be utilized. The team is currently finalizing controls, processes, policies and disclosures in preparation for performing a full end-to-end parallel run. This parallel run will be completed during the fourth quarter of 2019 for the period ended September 30, 2019. The Company’s preliminary evaluation indicates the provisions of ASU No. 2016-13 are expected to impact the Company’s Consolidated Financial Statements, in particular the level of the reserve for credit losses. The Company is continuing to evaluate the extent of the potential impact and expects that portfolio composition and economic conditions at the time of adoption will be a factor. In August 2018, the FASB issued ASU No. 2018-13, “Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement.” This ASU eliminates, adds and modifies certain disclosure requirements for fair value measurements. Among the changes, entities will no longer be required to disclose the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, but will be required to disclose the range and weighted average used to develop significant unobservable inputs for Level 3 fair value measurements. ASU No. 2018-13 is effective for interim and annual reporting periods beginning after December 15, 2019; early adoption is permitted. As ASU No. 2018-13 only revises disclosure requirements, it will not have a material impact on the Company’s Consolidated Financial Statements. As mentioned in the previous section the FASB issued ASU No. 2019-04 in April 2019. With respect to Topic 326, Financial Instruments - Credit Losses, ASU 2019-04 clarifies the scope of the credit losses standard and addresses issues related to accrued interest receivable balances, recoveries, variable interest rates and prepayments, among other things. With respect to Topic 825, Financial Instruments, on recognizing and measuring financial instruments, ASU 2019-04 addresses the scope of the guidance, the requirement for remeasurement under ASC 820 when using the measurement alternative, certain disclosure requirements and which equity securities have to be remeasured at historical exchange rates. The amendments to Topic 326 have the same effective dates as ASU 2016-13 (i.e., the first quarter of 2020). The Company is currently evaluating the potential impact of Topic 326 amendments on the Company’s Consolidated Financial Statements. The amendments to Topic 825 are effective for interim and annual reporting periods beginning after December 15, 2019 and are not expected to have a material impact on the Company’s Consolidated Financial Statements. In May 2019, the FASB issued ASU No. 2019-05, “Financial Instruments - Credit Losses (Topic 326); Targeted Transition Relief.” This ASU allows entities to irrevocably elect, upon adoption of ASU 2016-13, the fair value option on financial instruments that (1) were previously recorded at amortized cost and (2) are within the scope of ASC 326-20 if the instruments are eligible for the fair value option under ASC 825-10. The fair value option election does not apply to held-to-maturity debt securities. Entities are required to make this election on an instrument-by-instrument basis. ASU 2019-05 has the same effective date as ASU 2016-13 (i.e., the first quarter of 2020). The Company does not expect to elect the fair value option, and therefore, ASU 2019-05 is not expected to impact the Company’s Consolidated Financial Statements.

Cash and Cash Equivalents

Cash and Cash Equivalents	9 Months Ended
	Sep. 30, 2019
Cash and Cash Equivalents [Abstract]
Cash and Cash Equivalents	Cash and Cash Equivalents The following table provides a reconciliation of cash and cash equivalents reported within the consolidated statements of condition that sum to the total of the same such amounts shown in the consolidated statements of cash flows: (dollars in thousands) September 30, December 31, Interest-Bearing Deposits in Other Banks $ 2,946 $ 3,028 Funds Sold 108,446 198,860 Cash and Due From Banks 259,492 324,081 Total Cash and Cash Equivalents $ 370,884 $ 525,969

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2019
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities The amortized cost, gross unrealized gains and losses, and fair value of the Company’s investment securities as of September 30, 2019 and December 31, 2018 were as follows: (dollars in thousands) Amortized Cost Gross Gross Fair Value September 30, 2019 Available-for-Sale: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 236,794 $ 283 $ (1,392 ) $ 235,685 Debt Securities Issued by States and Political Subdivisions 53,211 772 (1 ) 53,982 Debt Securities Issued by U.S. Government-Sponsored Enterprises 21,969 18 (92 ) 21,895 Debt Securities Issued by Corporations 348,006 1,550 (1,115 ) 348,441 Mortgage-Backed Securities: Residential - Government Agencies 1,215,859 15,731 (2,953 ) 1,228,637 Residential - U.S. Government-Sponsored Enterprises 532,885 5,769 (1,318 ) 537,336 Commercial - Government Agencies 166,306 3,689 (1,577 ) 168,418 Total Mortgage-Backed Securities 1,915,050 25,189 (5,848 ) 1,934,391 Total $ 2,575,030 $ 27,812 $ (8,448 ) $ 2,594,394 Held-to-Maturity: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 354,073 $ 1,502 $ (133 ) $ 355,442 Debt Securities Issued by States and Political Subdivisions 65,109 1,254 — 66,363 Debt Securities Issued by Corporations 15,703 — (143 ) 15,560 Mortgage-Backed Securities: Residential - Government Agencies 1,144,257 16,945 (5,137 ) 1,156,065 Residential - U.S. Government-Sponsored Enterprises 1,282,944 13,456 (2,105 ) 1,294,295 Commercial - Government Agencies 84,824 474 (750 ) 84,548 Total Mortgage-Backed Securities 2,512,025 30,875 (7,992 ) 2,534,908 Total $ 2,946,910 $ 33,631 $ (8,268 ) $ 2,972,273 December 31, 2018 Available-for-Sale: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 394,485 $ 493 $ (2,577 ) $ 392,401 Debt Securities Issued by States and Political Subdivisions 559,800 5,227 (1,031 ) 563,996 Debt Securities Issued by U.S. Government-Sponsored Enterprises 56 — — 56 Debt Securities Issued by Corporations 224,997 — (1,857 ) 223,140 Mortgage-Backed Securities: Residential - Government Agencies 189,645 1,726 (929 ) 190,442 Residential - U.S. Government-Sponsored Enterprises 589,311 1,779 (12,563 ) 578,527 Commercial - Government Agencies 63,864 — (4,484 ) 59,380 Total Mortgage-Backed Securities 842,820 3,505 (17,976 ) 828,349 Total $ 2,022,158 $ 9,225 $ (23,441 ) $ 2,007,942 Held-to-Maturity: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 353,122 $ 186 $ (1,093 ) $ 352,215 Debt Securities Issued by States and Political Subdivisions 234,602 6,150 — 240,752 Debt Securities Issued by Corporations 97,266 — (1,755 ) 95,511 Mortgage-Backed Securities: Residential - Government Agencies 1,861,874 3,886 (51,773 ) 1,813,987 Residential - U.S. Government-Sponsored Enterprises 758,835 1,590 (20,259 ) 740,166 Commercial - Government Agencies 176,393 147 (5,177 ) 171,363 Total Mortgage-Backed Securities 2,797,102 5,623 (77,209 ) 2,725,516 Total $ 3,482,092 $ 11,959 $ (80,057 ) $ 3,413,994 As mentioned in Note 1 the FASB issued ASU No. 2019-04 in April 2019. In June 2019, the Company elected to early adopt the amendments to Topic 815, Derivatives and Hedging, which allowed the Company a one-time reclassification of certain prepayable debt securities from held-to-maturity to available-for-sale. On June 10, 2019, prepayable debt securities with a carrying value of $1.0 billion and a net unrealized gain of $3.1 million were transferred from held-to-maturity to available-for-sale. The reclassified securities consisted of mortgage-backed securities issued by U.S. government agencies and government-sponsored enterprises, municipal debt securities, and corporate debt securities. The table below presents an analysis of the contractual maturities of the Company’s investment securities as of September 30, 2019 . Debt securities issued by government agencies (Small Business Administration securities) and mortgage-backed securities are disclosed separately in the table below as these investment securities may prepay prior to their scheduled contractual maturity dates. (dollars in thousands) Amortized Cost Fair Value Available-for-Sale: Due in One Year or Less $ 169,544 $ 169,762 Due After One Year Through Five Years 120,351 120,126 Due After Five Years Through Ten Years 134,235 135,383 Due After Ten Years 51 52 424,181 425,323 Debt Securities Issued by Government Agencies 235,799 234,680 Mortgage-Backed Securities: Residential - Government Agencies 1,215,859 1,228,637 Residential - U.S. Government-Sponsored Enterprises 532,885 537,336 Commercial - Government Agencies 166,306 168,418 Total Mortgage-Backed Securities 1,915,050 1,934,391 Total $ 2,575,030 $ 2,594,394 Held-to-Maturity: Due in One Year or Less $ 304,243 $ 305,141 Due After One Year Through Five Years 119,592 121,302 Due After Five Years Through Ten Years 11,050 10,922 434,885 437,365 Mortgage-Backed Securities: Residential - Government Agencies 1,144,257 1,156,065 Residential - U.S. Government-Sponsored Enterprises 1,282,944 1,294,295 Commercial - Government Agencies 84,824 84,548 Total Mortgage-Backed Securities 2,512,025 2,534,908 Total $ 2,946,910 $ 2,972,273 Investment securities with carrying values of $2.6 billion and $2.3 billion as of September 30, 2019 and December 31, 2018 , respectively, were pledged to secure deposits of governmental entities and securities sold under agreements to repurchase. The table below presents the gains and losses from the sales of investment securities for the three and nine months ended September 30, 2019 and 2018 . Three Months Ended Nine Months Ended (dollars in thousands) 2019 2018 2019 2018 Gross Gains on Sales of Investment Securities $ 38 $ — $ 7,701 $ — Gross Losses on Sales of Investment Securities (1,507 ) (729 ) (10,781 ) (3,097 ) Net Gains (Losses) on Sales of Investment Securities $ (1,469 ) $ (729 ) $ (3,080 ) $ (3,097 ) The losses on sales of investment securities during the three and nine months ended September 30, 2019 were due to fees paid to the counterparties of the Company’s prior Visa Class B share sale transactions, which are expensed as incurred, combined with a $0.5 million liability recorded in third quarter 2019 related to a change in the Visa Class B conversion ratio. In addition, the gross gains and losses on sales of investment securities during the nine months ended September 30, 2019 included sales of municipal debt securities, mortgage-backed securities, and corporate debt securities as part of a portfolio repositioning. The losses during the three and nine months ended September 30, 2018 were due to fees paid to the counterparties of the Company’s prior Visa Class B share sale transactions combined with a $1.0 million liability recorded in the second quarter of 2018 related to changes in the Visa Class B conversion ratio. The Company’s gross unrealized losses and the related fair value of investment securities, aggregated by investment category and length of time in a continuous unrealized loss position, were as follows: Less Than 12 Months 12 Months or Longer Total (dollars in thousands) Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses September 30, 2019 Available-for-Sale: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 64,180 $ (115 ) $ 107,800 $ (1,277 ) $ 171,980 $ (1,392 ) Debt Securities Issued by States and Political Subdivisions 181 — 468 (1 ) 649 (1 ) Debt Securities Issued by U.S. Government-Sponsored Enterprises 21,233 (92 ) — — 21,233 (92 ) Debt Securities Issued by Corporations 25,808 (581 ) 114,466 (534 ) 140,274 (1,115 ) Mortgage-Backed Securities: Residential - Government Agencies 62,749 (173 ) 182,660 (2,780 ) 245,409 (2,953 ) Residential - U.S. Government-Sponsored Enterprises 60,586 (408 ) 82,390 (910 ) 142,976 (1,318 ) Commercial - Government Agencies — — 54,118 (1,577 ) 54,118 (1,577 ) Total Mortgage-Backed Securities 123,335 (581 ) 319,168 (5,267 ) 442,503 (5,848 ) Total $ 234,737 $ (1,369 ) $ 541,902 $ (7,079 ) $ 776,639 $ (8,448 ) Held-to-Maturity: Debt Securities Issued by the U.S. Treasury and Government Agencies $ — $ — $ 39,912 $ (133 ) $ 39,912 $ (133 ) Debt Securities Issued by Corporations 4,638 (15 ) 10,922 (128 ) 15,560 (143 ) Mortgage-Backed Securities: Residential - Government Agencies 76,076 (278 ) 277,116 (4,859 ) 353,192 (5,137 ) Residential - U.S. Government-Sponsored Enterprises 160,448 (312 ) 165,075 (1,793 ) 325,523 (2,105 ) Commercial - Government Agencies — — 53,014 (750 ) 53,014 (750 ) Total Mortgage-Backed Securities 236,524 (590 ) 495,205 (7,402 ) 731,729 (7,992 ) Total $ 241,162 $ (605 ) $ 546,039 $ (7,663 ) $ 787,201 $ (8,268 ) December 31, 2018 Available-for-Sale: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 157,058 $ (964 ) $ 173,763 $ (1,613 ) $ 330,821 $ (2,577 ) Debt Securities Issued by States and Political Subdivisions 38,138 (59 ) 156,772 (972 ) 194,910 (1,031 ) Debt Securities Issued by Corporations 59,770 (231 ) 163,371 (1,626 ) 223,141 (1,857 ) Mortgage-Backed Securities: Residential - Government Agencies 6,299 (10 ) 19,011 (919 ) 25,310 (929 ) Residential - U.S. Government-Sponsored Enterprises — — 473,380 (12,563 ) 473,380 (12,563 ) Commercial - Government Agencies — — 59,380 (4,484 ) 59,380 (4,484 ) Total Mortgage-Backed Securities 6,299 (10 ) 551,771 (17,966 ) 558,070 (17,976 ) Total $ 261,265 $ (1,264 ) $ 1,045,677 $ (22,177 ) $ 1,306,942 $ (23,441 ) Held-to-Maturity: Debt Securities Issued by the U.S. Treasury $ 99,440 $ (237 ) $ 134,239 $ (856 ) $ 233,679 $ (1,093 ) Debt Securities Issued by Corporations — — 95,511 (1,755 ) 95,511 (1,755 ) Mortgage-Backed Securities: Residential - Government Agencies 12,974 (45 ) 1,491,747 (51,728 ) 1,504,721 (51,773 ) Residential - U.S. Government-Sponsored Enterprises — — 617,000 (20,259 ) 617,000 (20,259 ) Commercial - Government Agencies 19,217 (61 ) 145,715 (5,116 ) 164,932 (5,177 ) Total Mortgage-Backed Securities 32,191 (106 ) 2,254,462 (77,103 ) 2,286,653 (77,209 ) Total $ 131,631 $ (343 ) $ 2,484,212 $ (79,714 ) $ 2,615,843 $ (80,057 ) The Company does not believe that the investment securities that were in an unrealized loss position as of September 30, 2019 , which were comprised of 233 individual securities, represent an other-than-temporary impairment. Total gross unrealized losses were primarily attributable to changes in interest rates, relative to when the investment securities were purchased, and not due to the credit quality of the investment securities. As of September 30, 2019 and December 31, 2018 , the gross unrealized losses reported for mortgage-backed securities were mostly related to investment securities issued by the Government National Mortgage Association. The Company does not intend to sell the investment securities that were in an unrealized loss position and it is not more likely than not that the Company will be required to sell the investment securities before recovery of their amortized cost basis, which may be at maturity. Interest income from taxable and non-taxable investment securities for the three and nine months ended September 30, 2019 and 2018 were as follows: Three Months Ended Nine Months Ended (dollars in thousands) 2019 2018 2019 2018 Taxable $ 35,584 $ 28,855 $ 102,912 $ 85,931 Non-Taxable 724 4,554 5,970 14,006 Total Interest Income from Investment Securities $ 36,308 $ 33,409 $ 108,882 $ 99,937 As of September 30, 2019 and December 31, 2018 , the carrying value of the Company’s Federal Home Loan Bank of Des Moines stock and Federal Reserve Bank stock was as follows: (dollars in thousands) September 30, December 31, Federal Home Loan Bank Stock $ 14,000 $ 15,000 Federal Reserve Bank Stock 21,093 20,858 Total $ 35,093 $ 35,858 These securities can only be redeemed or sold at their par value and only to the respective issuing institution or to another member institution. The Company records these non-marketable equity securities as a component of other assets and periodically evaluates these securities for impairment. Management considers these non-marketable equity securities to be long-term investments. Accordingly, when evaluating these securities for impairment, management considers the ultimate recoverability of the par value rather than recognizing temporary declines in value. Visa Class B Restricted Shares In 2008, the Company received Visa Class B restricted shares as part of Visa’s initial public offering. These shares are transferable only under limited circumstances until they can be converted into the publicly traded Class A common shares. This conversion will not occur until the settlement of certain litigation which will be indemnified by Visa members, including the Company. Visa funded an escrow account from its initial public offering to settle these litigation claims. Should this escrow account be insufficient to cover these litigation claims, Visa is entitled to fund additional amounts to the escrow account by reducing each member bank’s Class B conversion ratio to unrestricted Class A shares. As of September 30, 2019 , the conversion ratio was 1.6228 . See Note 12 Derivative Financial Instruments for more information. The Company occasionally sells these Visa Class B shares to other financial institutions. Concurrent with every sale the Company enters into an agreement with the buyer that requires payment to the buyer in the event Visa further reduces the conversion ratio. Based on the existing transfer restriction and the uncertainty of the outcome of the Visa litigation mentioned above, the remaining 83,014 Class B shares ( 134,715 Class A equivalents) that the Company owns as of September 30, 2019

Loans and Leases and the Allowa

Loans and Leases and the Allowance for Loan and Lease Losses	9 Months Ended
	Sep. 30, 2019
Loans and Leases and Allowance for Loan and Lease Losses [Abstract]
Loans and Leases and the Allowance for Loan and Lease Losses	Loans and Leases and the Allowance for Loan and Lease Losses Loans and Leases The Company’s loan and lease portfolio was comprised of the following as of September 30, 2019 and December 31, 2018 : (dollars in thousands) September 30, December 31, Commercial Commercial and Industrial $ 1,361,011 $ 1,331,149 Commercial Mortgage 2,477,296 2,302,356 Construction 154,754 170,061 Lease Financing 163,672 176,226 Total Commercial 4,156,733 3,979,792 Consumer Residential Mortgage 3,846,511 3,673,796 Home Equity 1,681,951 1,681,442 Automobile 713,424 658,133 Other 1 482,679 455,611 Total Consumer 6,724,565 6,468,982 Total Loans and Leases $ 10,881,298 $ 10,448,774 1 Comprised of other revolving credit, installment, and lease financing. The majority of the Company’s lending activity is with customers located in the State of Hawaii. A substantial portion of the Company’s real estate loans are secured by real estate in Hawaii. Net gains related to sales of residential mortgage loans, recorded as a component of mortgage banking income were $2.5 million and $0.4 million for the three months ended September 30, 2019 and 2018 , respectively, and $4.1 million and $1.1 million for the nine months ended September 30, 2019 and 2018 , respectively. Allowance for Loan and Lease Losses (the “Allowance”) The following presents by portfolio segment, the activity in the Allowance for the three and nine months ended September 30, 2019 and 2018 . The following also presents by portfolio segment, the balance in the Allowance disaggregated on the basis of the Company’s impairment measurement method and the related recorded investment in loans and leases as of September 30, 2019 and 2018 . (dollars in thousands) Commercial Consumer Total Three Months Ended September 30, 2019 Allowance for Loan and Lease Losses: Balance at Beginning of Period $ 69,268 $ 38,404 $ 107,672 Loans and Leases Charged-Off (239 ) (5,516 ) (5,755 ) Recoveries on Loans and Leases Previously Charged-Off 318 2,451 2,769 Net Loans and Leases Recovered (Charged-Off) 79 (3,065 ) (2,986 ) Provision for Credit Losses 1,023 3,227 4,250 Balance at End of Period $ 70,370 $ 38,566 $ 108,936 Nine Months Ended September 30, 2019 Allowance for Loan and Lease Losses: Balance at Beginning of Period $ 66,874 $ 39,819 $ 106,693 Loans and Leases Charged-Off (2,431 ) (15,281 ) (17,712 ) Recoveries on Loans and Leases Previously Charged-Off 1,220 7,485 8,705 Net Loans and Leases Recovered (Charged-Off) (1,211 ) (7,796 ) (9,007 ) Provision for Credit Losses 4,707 6,543 11,250 Balance at End of Period $ 70,370 $ 38,566 $ 108,936 As of September 30, 2019 Allowance for Loan and Lease Losses: Individually Evaluated for Impairment $ 115 $ 3,266 $ 3,381 Collectively Evaluated for Impairment 70,255 35,300 105,555 Total $ 70,370 $ 38,566 $ 108,936 Recorded Investment in Loans and Leases: Individually Evaluated for Impairment $ 19,324 $ 40,665 $ 59,989 Collectively Evaluated for Impairment 4,137,409 6,683,900 10,821,309 Total $ 4,156,733 $ 6,724,565 $ 10,881,298 Three Months Ended September 30, 2018 Allowance for Loan and Lease Losses: Balance at Beginning of Period $ 63,712 $ 44,476 $ 108,188 Loans and Leases Charged-Off (449 ) (5,578 ) (6,027 ) Recoveries on Loans and Leases Previously Charged-Off 542 2,187 2,729 Net Loans and Leases Recovered (Charged-Off) 93 (3,391 ) (3,298 ) Provision for Credit Losses 1,274 2,526 3,800 Balance at End of Period $ 65,079 $ 43,611 $ 108,690 Nine Months Ended September 30, 2018 Allowance for Loan and Lease Losses: Balance at Beginning of Period $ 65,822 $ 41,524 $ 107,346 Loans and Leases Charged-Off (1,140 ) (16,536 ) (17,676 ) Recoveries on Loans and Leases Previously Charged-Off 1,236 6,359 7,595 Net Loans and Leases Recovered (Charged-Off) 96 (10,177 ) (10,081 ) Provision for Credit Losses (839 ) 12,264 11,425 Balance at End of Period $ 65,079 $ 43,611 $ 108,690 As of September 30, 2018 Allowance for Loan and Lease Losses: Individually Evaluated for Impairment $ 135 $ 3,810 $ 3,945 Collectively Evaluated for Impairment 64,944 39,801 104,745 Total $ 65,079 $ 43,611 $ 108,690 Recorded Investment in Loans and Leases: Individually Evaluated for Impairment $ 12,190 $ 42,218 $ 54,408 Collectively Evaluated for Impairment 3,888,118 6,288,536 10,176,654 Total $ 3,900,308 $ 6,330,754 $ 10,231,062 Credit Quality Indicators The Company uses several credit quality indicators to manage credit risk in an ongoing manner. The Company uses an internal credit risk rating system that categorizes loans and leases into pass, special mention, or classified categories. Credit risk ratings are applied individually to those classes of loans and leases that have significant or unique credit characteristics that benefit from a case-by-case evaluation. These are typically loans and leases to businesses or individuals in the classes which comprise the commercial portfolio segment. Groups of loans and leases that are underwritten and structured using standardized criteria and characteristics, such as statistical models (e.g., credit scoring or payment performance), are typically risk-rated and monitored collectively. These are typically loans and leases to individuals in the classes which comprise the consumer portfolio segment. The following are the definitions of the Company’s credit quality indicators: Pass: Loans and leases in all classes within the commercial and consumer portfolio segments that are not adversely rated, are contractually current as to principal and interest, and are otherwise in compliance with the contractual terms of the loan or lease agreement. Management believes that there is a low likelihood of loss related to those loans and leases that are considered Pass. Special Mention: Loans and leases that have potential weaknesses that deserve management’s close attention. If not addressed, these potential weaknesses may result in deterioration of the repayment prospects for the loan or lease. Management believes that there is a moderate likelihood of some loss related to those loans and leases that are considered Special Mention. Classified: Loans and leases in the classes within the commercial portfolio segment that are inadequately protected by the sound worth and paying capacity of the borrower or of the collateral pledged, if any. Classified loans and leases are also those in the classes within the consumer portfolio segment that are past due 90 days or more as to principal or interest. Residential mortgage loans that are past due 90 days or more as to principal or interest may be considered Pass if the Company is in the process of collection and the current loan-to-value ratio is 60% or less. Home equity loans that are past due 90 days or more as to principal or interest may be considered Pass if the Company is in the process of collection, the first mortgage is with the Company, and the current combined loan-to-value ratio is 60% or less. Residential mortgage and home equity loans may be current as to principal and interest, but may be considered Classified for a period of generally up to six months following a loan modification. Following a period of demonstrated performance in accordance with the modified contractual terms, the loan may be removed from Classified status. Management believes that there is a distinct possibility that the Company will sustain some loss if the deficiencies related to Classified loans and leases are not corrected in a timely manner. The Company’s credit quality indicators are periodically updated on a case-by-case basis. The following presents by class and by credit quality indicator, the recorded investment in the Company’s loans and leases as of September 30, 2019 and December 31, 2018 . September 30, 2019 (dollars in thousands) Commercial and Industrial Commercial Mortgage Construction Lease Financing Total Commercial Pass $ 1,305,019 $ 2,413,316 $ 149,757 $ 161,947 $ 4,030,039 Special Mention 19,394 37,454 3,778 — 60,626 Classified 36,598 26,526 1,219 1,725 66,068 Total $ 1,361,011 $ 2,477,296 $ 154,754 $ 163,672 $ 4,156,733 (dollars in thousands) Residential Mortgage Home Equity Automobile Other 1 Total Consumer Pass $ 3,841,820 $ 1,678,930 $ 712,842 $ 481,604 $ 6,715,196 Classified 4,691 3,021 582 1,075 9,369 Total $ 3,846,511 $ 1,681,951 $ 713,424 $ 482,679 $ 6,724,565 Total Recorded Investment in Loans and Leases $ 10,881,298 December 31, 2018 (dollars in thousands) Commercial and Industrial Commercial Mortgage Construction Lease Financing Total Commercial Pass $ 1,302,278 $ 2,256,128 $ 168,740 $ 175,223 $ 3,902,369 Special Mention 17,688 30,468 — 5 48,161 Classified 11,183 15,760 1,321 998 29,262 Total $ 1,331,149 $ 2,302,356 $ 170,061 $ 176,226 $ 3,979,792 (dollars in thousands) Residential Mortgage Home Equity Automobile Other 1 Total Consumer Pass $ 3,668,475 $ 1,677,193 $ 657,620 $ 454,697 $ 6,457,985 Classified 5,321 4,249 513 914 10,997 Total $ 3,673,796 $ 1,681,442 $ 658,133 $ 455,611 $ 6,468,982 Total Recorded Investment in Loans and Leases $ 10,448,774 1 Comprised of other revolving credit, installment, and lease financing. Aging Analysis The following presents by class, an aging analysis of the Company’s loan and lease portfolio as of September 30, 2019 and December 31, 2018 . (dollars in thousands) 30 - 59 Days Past Due 60 - 89 Days Past Due Past Due 90 Days or More Non-Accrual Total Past Due and Non-Accrual Current Total Loans and Leases Non-Accrual Loans and Leases that are Current 2 As of September 30, 2019 Commercial Commercial and Industrial $ 826 $ 131 $ 81 $ 573 $ 1,611 $ 1,359,400 $ 1,361,011 $ 448 Commercial Mortgage 750 — — 11,088 11,838 2,465,458 2,477,296 11,088 Construction — — — — — 154,754 154,754 — Lease Financing — — — — — 163,672 163,672 — Total Commercial 1,576 131 81 11,661 13,449 4,143,284 4,156,733 11,536 Consumer Residential Mortgage 3,666 979 2,032 4,258 10,935 3,835,576 3,846,511 782 Home Equity 2,446 2,159 2,320 2,787 9,712 1,672,239 1,681,951 942 Automobile 13,809 1,681 582 — 16,072 697,352 713,424 — Other 1 2,507 1,812 1,076 — 5,395 477,284 482,679 — Total Consumer 22,428 6,631 6,010 7,045 42,114 6,682,451 6,724,565 1,724 Total $ 24,004 $ 6,762 $ 6,091 $ 18,706 $ 55,563 $ 10,825,735 $ 10,881,298 $ 13,260 As of December 31, 2018 Commercial Commercial and Industrial $ 3,653 $ 118 $ 10 $ 542 $ 4,323 $ 1,326,826 $ 1,331,149 $ 515 Commercial Mortgage 561 — — 2,040 2,601 2,299,755 2,302,356 2,040 Construction — — — — — 170,061 170,061 — Lease Financing — — — — — 176,226 176,226 — Total Commercial 4,214 118 10 2,582 6,924 3,972,868 3,979,792 2,555 Consumer Residential Mortgage 5,319 638 2,446 5,321 13,724 3,660,072 3,673,796 1,203 Home Equity 3,323 1,581 2,684 3,671 11,259 1,670,183 1,681,442 765 Automobile 12,372 2,240 513 — 15,125 643,008 658,133 — Other 1 2,913 1,245 914 — 5,072 450,539 455,611 — Total Consumer 23,927 5,704 6,557 8,992 45,180 6,423,802 6,468,982 1,968 Total $ 28,141 $ 5,822 $ 6,567 $ 11,574 $ 52,104 $ 10,396,670 $ 10,448,774 $ 4,523 1 Comprised of other revolving credit, installment, and lease financing. 2 Represents non-accrual loans that are not past due 30 days or more; however, full payment of principal and interest is still not expected. Impaired Loans The following presents by class, information related to impaired loans as of September 30, 2019 and December 31, 2018 . (dollars in thousands) Recorded Investment Unpaid Principal Balance Related Allowance for Loan Losses September 30, 2019 Impaired Loans with No Related Allowance Recorded: Commercial Commercial and Industrial $ 4,439 $ 4,439 $ — Commercial Mortgage 10,997 16,114 — Construction 1,219 1,219 — Total Commercial 16,655 21,772 — Total Impaired Loans with No Related Allowance Recorded $ 16,655 $ 21,772 $ — Impaired Loans with an Allowance Recorded: Commercial Commercial and Industrial $ 942 $ 1,225 $ 84 Commercial Mortgage 1,727 1,727 31 Total Commercial 2,669 2,952 115 Consumer Residential Mortgage 18,129 21,721 2,632 Home Equity 3,228 3,228 346 Automobile 17,621 17,621 244 Other 1 1,687 1,687 44 Total Consumer 40,665 44,257 3,266 Total Impaired Loans with an Allowance Recorded $ 43,334 $ 47,209 $ 3,381 Impaired Loans: Commercial $ 19,324 $ 24,724 $ 115 Consumer 40,665 44,257 3,266 Total Impaired Loans $ 59,989 $ 68,981 $ 3,381 December 31, 2018 Impaired Loans with No Related Allowance Recorded: Commercial Commercial and Industrial $ 4,587 $ 4,587 $ — Commercial Mortgage 2,712 6,212 — Construction 1,321 1,321 — Total Commercial 8,620 12,120 — Total Impaired Loans with No Related Allowance Recorded $ 8,620 $ 12,120 $ — Impaired Loans with an Allowance Recorded: Commercial Commercial and Industrial $ 1,856 $ 2,099 $ 130 Commercial Mortgage 1,822 1,822 92 Total Commercial 3,678 3,921 222 Consumer Residential Mortgage 19,753 23,635 3,051 Home Equity 3,359 3,359 350 Automobile 17,117 17,117 296 Other 1 2,098 2,098 57 Total Consumer 42,327 46,209 3,754 Total Impaired Loans with an Allowance Recorded $ 46,005 $ 50,130 $ 3,976 Impaired Loans: Commercial $ 12,298 $ 16,041 $ 222 Consumer 42,327 46,209 3,754 Total Impaired Loans $ 54,625 $ 62,250 $ 3,976 1 Comprised of other revolving credit and installment financing. The following presents by class, information related to the average recorded investment and interest income recognized on impaired loans for the three and nine months ended September 30, 2019 and 2018 . Three Months Ended Three Months Ended (dollars in thousands) Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized Impaired Loans with No Related Allowance Recorded: Commercial Commercial and Industrial $ 4,642 $ 70 $ 5,900 $ 48 Commercial Mortgage 8,359 15 3,179 15 Construction 1,243 20 1,361 2 Total Commercial 14,244 105 10,440 65 Total Impaired Loans with No Related Allowance Recorded $ 14,244 $ 105 $ 10,440 $ 65 Impaired Loans with an Allowance Recorded: Commercial Commercial and Industrial $ 1,312 $ 7 $ 1,537 $ 55 Commercial Mortgage 4,502 2 211 17 Total Commercial 5,814 9 1,748 72 Consumer Residential Mortgage 18,587 190 20,571 456 Home Equity 3,362 40 2,695 35 Automobile 17,624 297 16,008 293 Other 1 1,746 37 2,826 62 Total Consumer 41,319 564 42,100 846 Total Impaired Loans with an Allowance Recorded $ 47,133 $ 573 $ 43,848 $ 918 Impaired Loans: Commercial $ 20,058 $ 114 $ 12,188 $ 137 Consumer 41,319 564 42,100 846 Total Impaired Loans $ 61,377 $ 678 $ 54,288 $ 983 Nine Months Ended Nine Months Ended (dollars in thousands) Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized Impaired Loans with No Related Allowance Recorded: Commercial Commercial and Industrial $ 4,760 $ 233 $ 6,927 $ 244 Commercial Mortgage 6,322 47 5,285 132 Construction 1,275 62 1,373 47 Total Commercial 12,357 342 13,585 423 Total Impaired Loans with No Related Allowance Recorded $ 12,357 $ 342 $ 13,585 $ 423 Impaired Loans with an Allowance Recorded: Commercial Commercial and Industrial $ 1,499 $ 50 $ 1,347 $ 75 Commercial Mortgage 3,155 6 223 23 Total Commercial 4,654 56 1,570 98 Consumer Residential Mortgage 19,060 585 20,514 883 Home Equity 3,341 120 2,448 86 Automobile 17,537 890 15,881 832 Other 1 1,895 118 2,800 170 Total Consumer 41,833 1,713 41,643 1,971 Total Impaired Loans with an Allowance Recorded $ 46,487 $ 1,769 $ 43,213 $ 2,069 Impaired Loans: Commercial $ 17,011 $ 398 $ 15,155 $ 521 Consumer 41,833 1,713 41,643 1,971 Total Impaired Loans $ 58,844 $ 2,111 $ 56,798 $ 2,492 1 Comprised of other revolving credit and installment financing. For the three and nine months ended September 30, 2019 and 2018 , the amounts of interest income recognized by the Company within the periods that the loans were impaired were primarily related to loans modified in a troubled debt restructuring (“TDR”) that remained on accrual status. For the three and nine months ended September 30, 2019 and 2018 , the amount of interest income recognized using a cash-basis method of accounting during the periods that the loans were impaired was not material. Modifications A modification of a loan constitutes a TDR when the Company, for economic or legal reasons related to a borrower’s financial difficulties, grants a concession to the borrower that it would not otherwise consider. Loans modified in a TDR were $54.0 million as of September 30, 2019 and December 31, 2018 . There were $0.1 million and $0.2 million commitments to lend additional funds on loans modified in a TDR as of September 30, 2019 and December 31, 2018 , respectively. The Company offers various types of concessions when modifying a loan or lease. Commercial and industrial loans modified in a TDR often involve temporary interest-only payments, term extensions, and converting revolving credit lines to term loans. Additional collateral, a co-borrower, or a guarantor is often requested. Commercial mortgage and construction loans modified in a TDR often involve reducing the interest rate for the remaining term of the loan, extending the maturity date at an interest rate lower than the current market rate for new debt with similar risk, or substituting or adding a co-borrower or guarantor. Construction loans modified in a TDR may also involve extending the interest-only payment period. Residential mortgage loans modified in a TDR generally include a lower interest rate and the loan being fully amortized for up to 40 years from the modification effective date. In some cases, the Company may forbear a portion of the unpaid principal balance with a balloon payment due upon maturity or pay-off of the loan. Land loans are also included in the class of residential mortgage loans. Land loans are typically structured as interest-only monthly payments with a balloon payment due at maturity. Land loan modifications usually involve extending the interest-only monthly payments up to an additional five years with a balloon payment due at maturity, or re-amortizing the remaining balance over a period up to 360 months . Interest rates are not changed for land loan modifications. Home equity modifications are made infrequently and uniquely designed to meet the specific needs of each borrower. Automobile loans modified in a TDR are primarily comprised of loans where the Company has lowered monthly payments by extending the term. Loans modified in a TDR are typically already on non-accrual status and partial charge-offs have in some cases already been taken against the outstanding loan balance. As a result, loans modified in a TDR may have the financial effect of increasing the specific Allowance associated with the loan. An Allowance for impaired commercial and consumer loans that have been modified in a TDR is measured based on the present value of expected future cash flows discounted at the loan’s effective interest rate, the loan’s observable market price, or the estimated fair value of the collateral, less any selling costs, if the loan is collateral dependent. Management exercises significant judgment in developing these estimates. The following presents by class, information related to loans modified in a TDR during the three and nine months ended September 30, 2019 and 2018 . Loans Modified as a TDR for the Loans Modified as a TDR for the Recorded Increase in Recorded Increase in Troubled Debt Restructurings Number of Investment Allowance Number of Investment Allowance (dollars in thousands) Contracts (as of period end) 1 (as of period end) Contracts (as of period end) 1 (as of period end) Commercial Commercial and Industrial 1 $ 45 $ — 1 $ 233 $ — Total Commercial 1 45 — 1 233 — Consumer Residential Mortgage — — — 2 296 5 Home Equity — — — 2 434 69 Automobile 86 1,665 23 87 1,700 33 Other 2 14 117 3 49 326 9 Total Consumer 100 1,782 26 140 2,756 116 Total 101 $ 1,827 $ 26 141 $ 2,989 $ 116 Loans Modified as a TDR for the Loans Modified as a TDR for the Recorded Increase in Recorded Increase in Troubled Debt Restructurings Number of Investment Allowance Number of Investment Allowance (dollars in thousands) Contracts (as of period end) 1 (as of period end) Contracts (as of period end) 1 (as of period end) Commercial Commercial and Industrial 5 $ 244 $ 14 8 $ 1,450 $ 47 Commercial Mortgage 1 3,766 — — — — Total Commercial 6 4,010 14 8 1,450 47 Consumer Residential Mortgage 1 57 — 4 749 35 Home Equity 2 246 — 5 971 69 Automobile 271 5,011 69 254 5,196 100 Other 2 75 459 12 173 1,182 34 Total Consumer 349 5,773 81 436 8,098 238 Total 355 $ 9,783 $ 95 444 $ 9,548 $ 285 1 The period end balances reflect all paydowns and charge-offs since the modification date. TDRs fully paid-off, charged-off, or foreclosed upon by period end are not included. 2 Comprised of other revolving credit and installment financing. The following presents by class, all loans modified in a TDR that defaulted during the three and nine months ended September 30, 2019 and 2018 , and within twelve months of their modification date. A TDR is considered to be in default once it becomes 60 days or more past due following a modification. Three Months Ended Three Months Ended TDRs that Defaulted During the Period, Recorded Recorded Within Twelve Months of their Modification Date Number of Investment Number of Investment (dollars in thousands) Contracts (as of period end) 1 Contracts (as of period end) 1 Consumer Residential Mortgage 1 $ 133 — $ — Home Equity 1 195 — — Automobile 9 126 12 266 Other 2 9 72 28 174 Total Consumer 20 526 40 440 Total 20 $ 526 40 $ 440 Nine Months Ended Nine Months Ended TDRs that Defaulted During the Period, Recorded Recorded Within Twelve Months of their Modification Date Number of Investment Number of Investment (dollars in thousands) Contracts (as of period end) 1 Contracts (as of period end) 1 Commercial Commercial and Industrial 1 $ 55 — $ — Total Commercial 1 55 — — Consumer Residential Mortgage 1 133 — — Home Equity 1 195 — — Automobile 22 326 32 614 Other 2 24 144 56 382 Total Consumer 48 798 88 996 Total 49 $ 853 88 $ 996 1 The period end balances reflect all paydowns and charge-offs since the modification date. TDRs fully paid-off, charged-off, or foreclosed upon by period end are not included. 2 Comprised of other revolving credit and installment financing. Commercial and consumer loans modified in a TDR are closely monitored for delinquency as an early indicator of possible future default. If loans modified in a TDR subsequently default, the Company evaluates the loan for possible further impairment. The specific Allowance associated with the loan may be increased, adjustments may be made in the allocation of the Allowance, or partial charge-offs may be taken to further write-down the carrying value of the loan. Foreclosure Proceedings Consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure totaled $1.8 million as of September 30, 2019 .

Mortgage Servicing Rights

Mortgage Servicing Rights	9 Months Ended
	Sep. 30, 2019
Transfers and Servicing of Financial Assets [Abstract]
Mortgage Servicing Rights	Mortgage Servicing Rights The Company’s portfolio of residential mortgage loans serviced for third parties was $3.0 billion and $2.9 billion as of September 30, 2019 and December 31, 2018 , respectively. Substantially all of these loans were originated by the Company and sold to third parties on a non-recourse basis with servicing rights retained. These retained servicing rights are recorded as a servicing asset and are initially recorded at fair value (see Note 14 Fair Value of Assets and Liabilities for more information). Changes to the balance of mortgage servicing rights are recorded in mortgage banking income in the Company’s consolidated statements of income. The Company’s mortgage servicing activities include collecting principal, interest, and escrow payments from borrowers; making tax and insurance payments on behalf of borrowers; monitoring delinquencies and executing foreclosure proceedings; and accounting for and remitting principal and interest payments to investors. Servicing income, including late and ancillary fees, was $1.8 million for the three months ended September 30, 2019 and 2018 , and $5.4 million for the nine months ended September 30, 2019 and 2018 . Servicing income is recorded in mortgage banking income in the Company’s consolidated statements of income. The Company’s residential mortgage investor loan servicing portfolio is primarily comprised of fixed rate loans concentrated in Hawaii. For the three and nine months ended September 30, 2019 and 2018 , the change in the carrying value of the Company’s mortgage servicing rights accounted for under the fair value measurement method was as follows: Three Months Ended Nine Months Ended (dollars in thousands) 2019 2018 2019 2018 Balance at Beginning of Period $ 1,212 $ 1,366 $ 1,290 $ 1,454 Change in Fair Value: Due to Payoffs (38 ) (39 ) (116 ) (127 ) Total Changes in Fair Value of Mortgage Servicing Rights (38 ) (39 ) (116 ) (127 ) Balance at End of Period $ 1,174 $ 1,327 $ 1,174 $ 1,327 For the three and nine months ended September 30, 2019 and 2018 , the change in the carrying value of the Company’s mortgage servicing rights accounted for under the amortization method was as follows: Three Months Ended Nine Months Ended (dollars in thousands) 2019 2018 2019 2018 Balance at Beginning of Period $ 23,021 $ 23,217 $ 23,020 $ 23,168 Servicing Rights that Resulted From Asset Transfers 1,263 562 2,788 1,957 Amortization (1,032 ) (643 ) (2,546 ) (1,989 ) Valuation Allowance Provision (18 ) — (28 ) — Balance at End of Period $ 23,234 $ 23,136 $ 23,234 $ 23,136 Valuation Allowance: Balance at Beginning of Period $ (10 ) $ — $ — $ — Valuation Allowance Provision (18 ) — (28 ) — Balance at End of Period $ (28 ) $ — $ (28 ) $ — Fair Value of Mortgage Servicing Rights Accounted for Under the Amortization Method Beginning of Period $ 24,905 $ 29,746 $ 29,218 $ 26,716 End of Period $ 23,674 $ 30,063 $ 23,674 $ 30,063 The key data and assumptions used in estimating the fair value of the Company’s mortgage servicing rights as of September 30, 2019 and December 31, 2018 were as follows: September 30, December 31, 2018 Weighted-Average Constant Prepayment Rate 1 11.81 % 7.01 % Weighted-Average Life (in years) 5.79 7.89 Weighted-Average Note Rate 4.03 % 4.06 % Weighted-Average Discount Rate 2 6.96 % 9.59 % 1 Represents annualized loan prepayment rate assumption. 2 Derived from multiple interest rate scenarios that incorporate a spread to a market yield curve and market volatilities. A sensitivity analysis of the Company’s fair value of mortgage servicing rights to changes in certain key assumptions as of September 30, 2019 and December 31, 2018 is presented in the following table. (dollars in thousands) September 30, December 31, Constant Prepayment Rate Decrease in fair value from 25 basis points (“bps”) adverse change $ (268 ) $ (361 ) Decrease in fair value from 50 bps adverse change (529 ) (716 ) Discount Rate Decrease in fair value from 25 bps adverse change (231 ) (325 ) Decrease in fair value from 50 bps adverse change (458 ) (643 ) This analysis generally cannot be extrapolated because the relationship of a change in one key assumption to the change in the fair value of the Company’s mortgage servicing rights usually is not linear. Also, the effect of changing one key assumption without changing other assumptions is not realistic.

Low Income Housing Tax Credit P

Low Income Housing Tax Credit Partnerships	9 Months Ended
	Sep. 30, 2019
Equity Method Investments and Joint Ventures [Abstract]
Low Income Housing Tax Credit Partnerships	Affordable Housing Projects Tax Credit Partnerships The Company makes equity investments in various limited partnerships or limited liability companies that sponsor affordable housing projects utilizing the Low Income Housing Tax Credit (“LIHTC”) pursuant to Section 42 of the Internal Revenue Code. The purpose of these investments is to achieve a satisfactory return on capital, to facilitate the sale of affordable housing product offerings, and to assist in achieving goals associated with the Community Reinvestment Act. The primary activities of these entities include the identification, development, and operation of multi-family housing that is leased to qualifying residential tenants. Generally, these types of investments are funded through a combination of debt and equity. The Company is a limited partner or non-managing member in each LIHTC limited partnership or limited liability company, respectively. Each of these entities is managed by an unrelated third-party general partner or managing member who exercises significant control over the affairs of the entity. The general partner or managing member has all the rights, powers and authority granted or permitted to be granted to a general partner of a limited partnership or managing member of a limited liability company. Duties entrusted to the general partner or managing member include, but are not limited to: investment in operating companies, company expenditures, investment of excess funds, borrowing funds, employment of agents, disposition of fund property, prepayment and refinancing of liabilities, votes and consents, contract authority, disbursement of funds, accounting methods, tax elections, bank accounts, insurance, litigation, cash reserve, and use of working capital reserve funds. Except for limited rights granted to the limited partner(s) or non-managing member (s) relating to the approval of certain transactions, the limited partner(s) and non-managing members may not participate in the operation, management, or control of the entity’s business, transact any business in the entity’s name or have any power to sign documents for or otherwise bind the entity. In addition, the general partner or managing member may only be removed by the limited partner(s) or managing member(s) in the event of a failure to comply with the terms of the agreement or negligence in performing its duties. The general partner or managing member of each entity has both the power to direct the activities which most significantly affect the performance of each entity and the obligation to absorb losses or the right to receive benefits that could be significant to the entities. Therefore, the Company has determined that it is not the primary beneficiary of any LIHTC entity. The Company uses the effective yield method to account for its pre-2015 investments in these entities. Beginning January 1, 2015, any new investments that meet the requirements of the proportional amortization method are recognized using the proportional amortization method. The Company’s net affordable housing tax credit investments and related unfunded commitments were $71.9 million and $73.7 million as of September 30, 2019 and December 31, 2018 , respectively, and are included in other assets in the consolidated statements of condition. Unfunded Commitments As of September 30, 2019 , the expected payments for unfunded affordable housing commitments were as follows: (dollars in thousands) Amount 2019 $ 2,923 2020 12,370 2021 44 2022 69 2023 45 Thereafter 1,417 Total Unfunded Commitments $ 16,868 The following table presents tax credits and other tax benefits recognized and amortization expense related to affordable housing for the three and nine months ended September 30, 2019 and 2018 . Three Months Ended Nine Months Ended (dollars in thousands) 2019 2018 2019 2018 Effective Yield Method Tax credits and other tax benefits recognized $ 2,930 $ 3,380 $ 8,789 $ 10,192 Amortization Expense in Provision for Income Taxes 1,891 2,078 5,674 6,233 Proportional Amortization Method Tax credits and other tax benefits recognized $ 753 $ 410 $ 2,260 $ 1,231 Amortization Expense in Provision for Income Taxes 645 333 1,934 999 There were no impairment losses related to LIHTC investments during the nine months ended September 30, 2019 and 2018 . During the first quarter of 2018, the Company recorded a $2.0 million adjustment to increase its LIHTC investments. This adjustment resulted in a decrease to the provision for income tax.

Balance Sheet Offsetting

Balance Sheet Offsetting	9 Months Ended
	Sep. 30, 2019
Offsetting [Abstract]
Balance Sheet Offsetting	Balance Sheet Offsetting Interest Rate Swap Agreements (“Swap Agreements”) The Company enters into swap agreements to facilitate the risk management strategies of a small number of commercial banking customers. The Company mitigates the risk of entering into these agreements by entering into equal and offsetting swap agreements with highly-rated third-party financial institutions. The swap agreements are free-standing derivatives and are recorded at fair value in the Company’s consolidated statements of condition (asset positions are included in other assets and liability positions are included in other liabilities). The Company is party to master netting arrangements with its financial institution counterparties; however, the Company does not offset assets and liabilities under these arrangements for financial statement presentation purposes. The master netting arrangements provide for a single net settlement of all swap agreements, as well as collateral, in the event of default on, or termination of, any one contract. Collateral, usually in the form of cash or marketable securities, is posted by the party (i.e., the Company or the financial institution counterparty) with net liability positions in accordance with contract thresholds. The Company had net liability positions with its financial institution counterparties totaling $8.2 million and $0.3 million as of September 30, 2019 and December 31, 2018 , respectively. See Note 12 Derivative Financial Instruments for more information. Parties to a centrally cleared over-the-counter derivative exchange daily payments that reflect the daily change in value of the derivative. Effective 2017, these payments, commonly referred to as variation margin, are recorded as settlements of the derivatives’ mark-to-market exposure rather than collateral against the exposures. This rule change effectively results in any centrally cleared derivative having a fair value that approximates zero on a daily basis, and therefore, these swap agreements were not included in the offsetting table at the end of this section. See Note 12 Derivative Financial Instruments for more information. Securities Sold Under Agreements to Repurchase (“Repurchase Agreements”) The Company enters into agreements under which it sells securities subject to an obligation to repurchase the same or similar securities. Under these arrangements, the Company may transfer legal control over the assets but still retain effective control through an agreement that both entitles and obligates the Company to repurchase the assets. As a result, these repurchase agreements are accounted for as collateralized financing arrangements (i.e., secured borrowings) and not as sales and subsequent repurchases of securities. The obligation to repurchase the securities is reflected as a liability in the Company’s consolidated statements of condition, while the securities underlying the repurchase agreements remain in the respective investment securities asset accounts. As a result, there is no offsetting or netting of the investment securities assets with the repurchase agreement liabilities. In addition, as the Company does not enter into reverse repurchase agreements, there is no such offsetting to be done with the repurchase agreements. The right of setoff for a repurchase agreement resembles a secured borrowing, whereby the collateral pledged by the Company would be used to settle the fair value of the repurchase agreement should the Company be in default (e.g., fail to make an interest payment to the counterparty). For private institution repurchase agreements, if the private institution counterparty were to default (e.g., declare bankruptcy), the Company could cancel the repurchase agreement (i.e., cease payment of principal and interest) and attempt collection on the amount of collateral value in excess of the repurchase agreement fair value. The collateral is held by a third-party financial institution in the counterparty’s custodial account. The counterparty has the right to sell or repledge the investment securities. For government entity repurchase agreements, the collateral is held by the Company in a segregated custodial account under a tri-party agreement. The Company is required by the counterparty to maintain adequate collateral levels. In the event the collateral fair value falls below stipulated levels, the Company will pledge additional securities. The Company closely monitors collateral levels to ensure adequate levels are maintained, while mitigating the potential risk of over-collateralization in the event of counterparty default. The following table presents the remaining contractual maturities of the Company’s repurchase agreements as of September 30, 2019 and December 31, 2018 , disaggregated by the class of collateral pledged. Remaining Contractual Maturity of Repurchase Agreements (dollars in thousands) Up to 91-365 days 1-3 Years After Total September 30, 2019 Class of Collateral Pledged: Debt Securities Issued by the U.S. Treasury and Government Agencies $ — $ — $ 198,303 $ 116,587 $ 314,890 Debt Securities Issued by States and Political Subdivisions 490 2,300 — — 2,790 Mortgage-Backed Securities: Residential - Government Agencies 1,509 — 26,697 59,524 87,730 Residential - U.S. Government-Sponsored Enterprises — — — 198,889 198,889 Total $ 1,999 $ 2,300 $ 225,000 $ 375,000 $ 604,299 December 31, 2018 Class of Collateral Pledged: Debt Securities Issued by the U.S. Treasury and Government Agencies $ — $ — $ 198,442 $ 117,021 $ 315,463 Debt Securities Issued by States and Political Subdivisions 1,906 1,590 — — 3,496 Mortgage-Backed Securities: Residential - Government Agencies 800 — 26,558 70,341 97,699 Residential - U.S. Government-Sponsored Enterprises — — — 87,638 87,638 Total $ 2,706 $ 1,590 $ 225,000 $ 275,000 $ 504,296 The following table presents the assets and liabilities subject to an enforceable master netting arrangement, or repurchase agreements, as of September 30, 2019 and December 31, 2018 . The swap agreements the Company has with our commercial banking customers are not subject to an enforceable master netting arrangement, and therefore, are excluded from this table. As previously mentioned, centrally cleared swap agreements between the Company and institutional counterparties are also excluded from this table. (i) (ii) (iii) = (i)-(ii) (iv) (v) = (iii)-(iv) Gross Amounts Recognized in the Statements of Condition Gross Amounts Offset in the Statements of Condition Net Amounts Presented in the Statements of Condition Gross Amounts Not Offset in the Statements of Condition (dollars in thousands) Netting Adjustments per Master Netting Arrangements Fair Value of Collateral Pledged/Received 1 Net Amount September 30, 2019 Assets: Interest Rate Swap Agreements: Institutional Counterparties $ 92 $ — $ 92 $ 92 $ — $ — Liabilities: Interest Rate Swap Agreements: Institutional Counterparties 8,258 — 8,258 92 6,113 2,053 Repurchase Agreements: Private Institutions 600,000 — 600,000 — 600,000 — Government Entities 4,299 — 4,299 — 4,299 — $ 604,299 $ — $ 604,299 $ — $ 604,299 $ — December 31, 2018 Assets: Interest Rate Swap Agreements: Institutional Counterparties $ 7,572 $ — $ 7,572 $ 1,490 $ — $ 6,082 Liabilities: Interest Rate Swap Agreements: Institutional Counterparties 1,490 — 1,490 1,490 — — Repurchase Agreements: Private Institutions 500,000 — 500,000 — 500,000 — Government Entities 4,296 — 4,296 — 4,296 — $ 504,296 $ — $ 504,296 $ — $ 504,296 $ — 1 The application of collateral cannot reduce the net amount below zero. Therefore, excess collateral is not reflected in this table. For repurchase agreements with private institutions, the fair value of investment securities pledged was $644.3 million and $526.7 million as of September 30, 2019 and December 31, 2018 , respectively. For repurchase agreements with government entities, the fair value of investment securities pledged was $5.8 million and $6.8 million as of September 30, 2019 and December 31, 2018

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2019
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) The following table presents the components of other comprehensive income (loss) for the three and nine months ended September 30, 2019 and 2018 : (dollars in thousands) Before Tax Tax Effect Net of Tax Three Months Ended September 30, 2019 Net Unrealized Gains (Losses) on Investment Securities: Net Unrealized Gains (Losses) Arising During the Period $ 7,314 $ 1,938 $ 5,376 Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) that (Increase) Decrease Net Income: Amortization of Unrealized Holding (Gains) Losses on Held-to-Maturity Securities 1 39 10 29 Net Unrealized Gains (Losses) on Investment Securities 7,353 1,948 5,405 Defined Benefit Plans: Amortization of Net Actuarial Losses (Gains) 406 108 298 Amortization of Prior Service Credit (72 ) (19 ) (53 ) Defined Benefit Plans, Net 334 89 245 Other Comprehensive Income (Loss) $ 7,687 $ 2,037 $ 5,650 Three Months Ended September 30, 2018 Net Unrealized Gains (Losses) on Investment Securities: Net Unrealized Gains (Losses) Arising During the Period $ (8,086 ) $ (2,137 ) $ (5,949 ) Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) that (Increase) Decrease Net Income: Amortization of Unrealized Holding (Gains) Losses on Held-to-Maturity Securities 1 476 126 350 Net Unrealized Gains (Losses) on Investment Securities (7,610 ) (2,011 ) (5,599 ) Defined Benefit Plans: Amortization of Net Actuarial Losses (Gains) 437 115 322 Amortization of Prior Service Credit (142 ) (36 ) (106 ) Defined Benefit Plans, Net 295 79 216 Other Comprehensive Income (Loss) $ (7,315 ) $ (1,932 ) $ (5,383 ) Nine Months Ended September 30, 2019 Net Unrealized Gains (Losses) on Investment Securities: Net Unrealized Gains (Losses) Arising During the Period $ 38,077 $ 10,090 $ 27,987 Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) that (Increase) Decrease Net Income: (Gain) Loss on Sale (63 ) (17 ) (46 ) Amortization of Unrealized Holding (Gains) Losses on Held-to-Maturity Securities 1 804 212 592 Net Unrealized Gains (Losses) on Investment Securities 38,818 10,285 28,533 Defined Benefit Plans: Amortization of Net Actuarial Losses (Gains) 1,218 323 895 Amortization of Prior Service Credit (216 ) (57 ) (159 ) Defined Benefit Plans, Net 1,002 266 736 Other Comprehensive Income (Loss) $ 39,820 $ 10,551 $ 29,269 Nine Months Ended September 30, 2018 Net Unrealized Gains (Losses) on Investment Securities: Net Unrealized Gains (Losses) Arising During the Period $ (25,765 ) $ (6,812 ) $ (18,953 ) Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) that (Increase) Decrease Net Income: Amortization of Unrealized Holding (Gains) Losses on Held-to-Maturity Securities 1 1,712 453 1,259 Net Unrealized Gains (Losses) on Investment Securities (24,053 ) (6,359 ) (17,694 ) Defined Benefit Plans: Amortization of Net Actuarial Losses (Gains) 1,309 346 963 Amortization of Prior Service Credit (426 ) (111 ) (315 ) Defined Benefit Plans, Net 883 235 648 Other Comprehensive Income (Loss) $ (23,170 ) $ (6,124 ) $ (17,046 ) 1 The amount relates to the amortization/accretion of unrealized net gains and losses related to the Company’s reclassification of available-for-sale investment securities to the held-to-maturity category. The unrealized net gains/losses will be amortized/accreted over the remaining life of the investment securities as an adjustment of yield. The following table presents the changes in each component of accumulated other comprehensive income (loss), net of tax, for the three and nine months ended September 30, 2019 and 2018 : (dollars in thousands) Investment Securities-Available-for-Sale Investment Securities-Held-to-Maturity Defined Benefit Plans Accumulated Other Comprehensive Income (Loss) Three Months Ended September 30, 2019 Balance at Beginning of Period $ 8,859 $ (764 ) $ (35,519 ) $ (27,424 ) Other Comprehensive Income (Loss) Before Reclassifications 5,376 — — 5,376 Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) — 29 245 274 Total Other Comprehensive Income (Loss) 5,376 29 245 5,650 Balance at End of Period $ 14,235 $ (735 ) $ (35,274 ) $ (21,774 ) Three Months Ended September 30, 2018 Balance at Beginning of Period $ (15,331 ) $ (5,272 ) $ (33,252 ) $ (53,855 ) Other Comprehensive Income (Loss) Before Reclassifications (5,949 ) — — (5,949 ) Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) — 350 216 566 Total Other Comprehensive Income (Loss) (5,949 ) 350 216 (5,383 ) Balance at End of Period $ (21,280 ) $ (4,922 ) $ (33,036 ) $ (59,238 ) Nine Months Ended September 30, 2019 Balance at Beginning of Period $ (10,447 ) $ (4,586 ) $ (36,010 ) $ (51,043 ) Other Comprehensive Income (Loss) Before Reclassifications 27,987 — — 27,987 Transfers (3,259 ) 3,259 — — Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) (46 ) 592 736 1,282 Total Other Comprehensive Income (Loss) 24,682 3,851 736 29,269 Balance at End of Period $ 14,235 $ (735 ) $ (35,274 ) $ (21,774 ) Nine Months Ended September 30, 2018 Balance at Beginning of Period $ (1,915 ) $ (5,085 ) $ (27,715 ) $ (34,715 ) Other Comprehensive Income (Loss) Before Reclassifications (18,953 ) — — (18,953 ) Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) — 1,259 648 1,907 Total Other Comprehensive Income (Loss) (18,953 ) 1,259 648 (17,046 ) Reclassification of the Income Tax Effects of the (412 ) (1,096 ) (5,969 ) (7,477 ) Balance at End of Period $ (21,280 ) $ (4,922 ) $ (33,036 ) $ (59,238 ) The following table presents the amounts reclassified out of each component of accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2019 and 2018 : Details about Accumulated Other Comprehensive Income (Loss) Components Amount Reclassified from Accumulated Other Comprehensive Income (Loss) 1 Affected Line Item in the Statement Where Net Income Is Presented Three Months Ended September 30, (dollars in thousands) 2019 2018 Amortization of Unrealized Holding Gains (Losses) on Investment Securities Held-to-Maturity $ (39 ) $ (476 ) Interest Income 10 126 Provision for Income Tax (29 ) (350 ) Net of Tax Amortization of Defined Benefit Plan Items Prior Service Credit 2 72 142 Net Actuarial Losses 2 (406 ) (437 ) (334 ) (295 ) Total Before Tax 89 79 Provision for Income Tax (245 ) (216 ) Net of Tax Total Reclassifications for the Period $ (274 ) $ (566 ) Net of Tax Details about Accumulated Other Comprehensive Income (Loss) Components Amount Reclassified from Accumulated Other Comprehensive Income (Loss) 1 Affected Line Item in the Statement Where Net Income Is Presented Nine Months Ended September 30, (dollars in thousands) 2019 2018 Amortization of Unrealized Holding Gains (Losses) on Investment Securities Held-to-Maturity $ (804 ) $ (1,712 ) Interest Income 212 453 Provision for Income Tax (592 ) (1,259 ) Net of Tax Sale of Investment Securities Available-for-Sale 63 — Investment Securities Gains (Losses), Net (17 ) — Provision for Income Tax 46 — Net of tax Amortization of Defined Benefit Plan Items Prior Service Credit 2 216 426 Net Actuarial Losses 2 (1,218 ) (1,309 ) (1,002 ) (883 ) Total Before Tax 266 235 Provision for Income Tax (736 ) (648 ) Net of Tax Total Reclassifications for the Period $ (1,282 ) $ (1,907 ) Net of Tax 1 Amounts in parentheses indicate reductions to net income. 2 These accumulated other comprehensive income (loss) components are included in the computation of net periodic benefit cost and are included in Other Noninterest Expense on the consolidated statements of income (see Note 11 Pension Plans and Postretirement Benefit Plan for additional details).

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share There were no adjustments to net income, the numerator, for purposes of computing earnings per share. The following is a reconciliation of the weighted average number of common shares outstanding for computing diluted earnings per share and antidilutive stock options and restricted stock outstanding for the three and nine months ended September 30, 2019 and 2018 : Three Months Ended Nine Months Ended 2019 2018 2019 2018 Denominator for Basic Earnings Per Share 40,190,508 41,620,776 40,554,036 41,846,080 Dilutive Effect of Equity Based Awards 260,234 278,625 252,259 287,696 Denominator for Diluted Earnings Per Share 40,450,742 41,899,401 40,806,295 42,133,776 Antidilutive Stock Options and Restricted Stock Outstanding — — 2,399 —

Business Segments

Business Segments	9 Months Ended
	Sep. 30, 2019
Segment Reporting [Abstract]
Business Segments	Business Segments The Company’s business segments are defined as Retail Banking, Commercial Banking, Investment Services and Private Banking, and Treasury and Other. The Company’s internal management accounting process measures the performance of these business segments. This process, which is not necessarily comparable with the process used by any other financial institution, uses various techniques to assign balance sheet and income statement amounts to the business segments, including allocations of income, expense, the provision for credit losses, and capital. This process is dynamic and requires certain allocations based on judgment and other subjective factors. Unlike financial accounting, there is no comprehensive authoritative guidance for management accounting that is equivalent to GAAP. Previously reported results have been reclassified to conform to the current reporting structure. The net interest income of the business segments reflects the results of a funds transfer pricing process that matches assets and liabilities with similar interest rate sensitivity and maturity characteristics and reflects the allocation of net interest income related to the Company’s overall asset and liability management activities on a proportionate basis. The basis for the allocation of net interest income is a function of the Company’s assumptions that are subject to change based on changes in current interest rates and market conditions. Funds transfer pricing also serves to transfer interest rate risk to Treasury. However, the other business segments have some latitude to retain certain interest rate exposures related to customer pricing decisions within guidelines. The provision for credit losses reflects the actual net charge-offs of the business segments. The amount of the consolidated provision for loan and lease losses is based on the methodology that we use to estimate the Company’s consolidated Allowance. The residual provision for credit losses to arrive at the consolidated provision for credit losses is included in Treasury and Other. Noninterest income and expense includes allocations from support units to business units. These allocations are based on actual usage where practicably calculated or by management’s estimate of such usage. The provision for income taxes is allocated to business segments using a 26% effective income tax rate. However, the provision for income taxes for the Company’s Leasing business unit (included in the Commercial Banking segment) and Auto Leasing portfolio and Pacific Century Life Insurance business unit (both included in the Retail Banking segment) are assigned their actual effective income tax rates due to the unique relationship that income taxes have with their products. The residual income tax expense or benefit to arrive at the consolidated effective income tax rate is included in Treasury and Other. Retail Banking Retail Banking offers a broad range of financial products and services to consumers and small businesses. Loan and lease products include residential mortgage loans, home equity lines of credit, automobile loans and leases, personal lines of credit, installment loans, and small business loans and leases. Deposit products include checking, savings, and time deposit accounts. Retail Banking also offers co-branded credit cards and some types of consumer insurance products. Products and services from Retail Banking are delivered to customers through 67 branch locations and 379 ATMs throughout Hawaii and the Pacific Islands, e-Bankoh (on-line banking service), a 24-hour customer service center, and a mobile banking service. Commercial Banking Commercial Banking offers products including corporate banking, commercial real estate loans, commercial lease financing, auto dealer financing, and deposit products. Commercial lending and deposit products are offered to middle-market and large companies in Hawaii and the Pacific Islands. In addition, Commercial Banking offers deposit products to government entities in Hawaii. Commercial real estate mortgages focus on customers that include investors, developers, and builders predominantly domiciled in Hawaii. Commercial Banking also includes international banking and provides merchant services to its customers. Investment Services and Private Banking Investment Services and Private Banking includes private banking and international client banking services, trust services, investment management, and institutional investment advisory services. A significant portion of this segment’s income is derived from fees, which are generally based on the market values of assets under management. The private banking and personal trust groups assist individuals and families in building and preserving their wealth by providing investment, credit, and trust services to high-net-worth individuals. The investment management group manages portfolios utilizing a variety of investment products. Institutional client services offer investment advice to corporations, government entities, and foundations. This segment also provides a full service brokerage offering equities, mutual funds, life insurance, and annuity products. Treasury and Other Treasury consists of corporate asset and liability management activities, including interest rate risk management and a foreign currency exchange business. This segment’s assets and liabilities (and related interest income and expense) consist of interest-bearing deposits, investment securities, federal funds sold and purchased, and short and long-term borrowings. The primary sources of noninterest income are from bank-owned life insurance, net gains from the sale of investment securities, and foreign exchange income related to customer-driven currency requests from merchants and island visitors. The net residual effect of the transfer pricing of assets and liabilities is included in Treasury, along with the elimination of intercompany transactions. Other organizational units (Technology, Operations, Marketing, Human Resources, Finance, Credit and Risk Management, and Corporate and Regulatory Administration) provide a wide-range of support to the Company’s other income earning segments. Expenses incurred by these support units are charged to the business segments through an internal cost allocation process. Selected business segment financial information as of and for the three and nine months ended September 30, 2019 and 2018 were as follows: (dollars in thousands) Retail Banking Commercial Banking Investment Services and Private Banking Treasury and Other Consolidated Total Three Months Ended September 30, 2019 Net Interest Income $ 66,648 $ 46,791 $ 9,641 $ 1,816 $ 124,896 Provision for Credit Losses 3,084 (130 ) 32 1,264 4,250 Net Interest Income After Provision for Credit Losses 63,564 46,921 9,609 552 120,646 Noninterest Income 22,964 8,739 13,663 1,141 46,507 Noninterest Expense (59,358 ) (21,330 ) (15,840 ) (3,821 ) (100,349 ) Income Before Provision for Income Taxes 27,170 34,330 7,432 (2,128 ) 66,804 Provision for Income Taxes (6,547 ) (8,560 ) (1,959 ) 2,314 (14,752 ) Net Income $ 20,623 $ 25,770 $ 5,473 $ 186 $ 52,052 Total Assets as of September 30, 2019 $ 6,668,902 $ 4,145,717 $ 324,388 $ 6,533,133 $ 17,672,140 Three Months Ended September 30, 2018 Net Interest Income $ 66,927 $ 46,240 $ 10,574 $ (814 ) $ 122,927 Provision for Credit Losses 3,229 69 — 502 3,800 Net Interest Income After Provision for Credit Losses 63,698 46,171 10,574 (1,316 ) 119,127 Noninterest Income 19,814 6,241 13,526 1,901 41,482 Noninterest Expense (51,806 ) (20,242 ) (15,657 ) (2,833 ) (90,538 ) Income Before Provision for Income Taxes 31,706 32,170 8,443 (2,248 ) 70,071 Provision for Income Taxes (7,943 ) (7,218 ) (2,226 ) 4,249 (13,138 ) Net Income $ 23,763 $ 24,952 $ 6,217 $ 2,001 $ 56,933 Total Assets as of September 30, 2018 $ 6,246,126 $ 3,873,454 $ 340,793 $ 6,531,361 $ 16,991,734 Nine Months Ended September 30, 2019 Net Interest Income $ 200,019 $ 139,784 $ 29,685 $ 4,342 $ 373,830 Provision for Credit Losses 7,852 1,141 14 2,243 11,250 Net Interest Income After Provision for Credit Losses 192,167 138,643 29,671 2,099 362,580 Noninterest Income 65,305 22,738 41,767 5,826 135,636 Noninterest Expense (163,968 ) (63,545 ) (49,200 ) (9,418 ) (286,131 ) Income Before Provision for Income Taxes 93,504 97,836 22,238 (1,493 ) 212,085 Provision for Income Taxes (22,883 ) (22,507 ) (5,862 ) 6,937 (44,315 ) Net Income $ 70,621 $ 75,329 $ 16,376 $ 5,444 $ 167,770 Total Assets as of September 30, 2019 $ 6,668,902 $ 4,145,717 $ 324,388 $ 6,533,133 $ 17,672,140 Nine Months Ended September 30, 2018 Net Interest Income $ 197,007 $ 133,148 $ 30,987 $ 1,237 $ 362,379 Provision for Credit Losses 10,417 (276 ) (60 ) 1,344 11,425 Net Interest Income After Provision for Credit Losses 186,590 133,424 31,047 (107 ) 350,954 Noninterest Income 58,665 17,395 41,941 8,814 126,815 Noninterest Expense (158,344 ) (60,432 ) (48,264 ) (8,673 ) (275,713 ) Income Before Provision for Income Taxes 86,911 90,387 24,724 34 202,056 Provision for Income Taxes (21,707 ) (20,782 ) (6,518 ) 12,642 (36,365 ) Net Income $ 65,204 $ 69,605 $ 18,206 $ 12,676 $ 165,691 Total Assets as of September 30, 2018 $ 6,246,126 $ 3,873,454 $ 340,793 $ 6,531,361 $ 16,991,734

Derivative Financial Instrument

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments The notional amount and fair value of the Company’s derivative financial instruments as of September 30, 2019 and December 31, 2018 were as follows: September 30, 2019 December 31, 2018 (dollars in thousands) Notional Amount Fair Value Notional Amount Fair Value Interest Rate Lock Commitments $ 110,702 $ 2,788 $ 33,133 $ 871 Forward Commitments 130,815 201 34,102 (352 ) Interest Rate Swap Agreements Receive Fixed/Pay Variable Swaps 763,316 37,289 505,034 (2,537 ) Pay Fixed/Receive Variable Swaps 763,316 (8,166 ) 505,034 6,082 Foreign Exchange Contracts 72,683 (405 ) 55,663 793 Conversion Rate Swap Agreement 104,816 (453 ) 80,746 — The following table presents the Company’s derivative financial instruments, their fair values, and their location in the consolidated statements of condition as of September 30, 2019 and December 31, 2018 : Derivative Financial Instruments September 30, 2019 December 31, 2018 Not Designated as Hedging Instruments 1 Asset Liability Asset Liability (dollars in thousands) Derivatives Derivatives Derivatives Derivatives Interest Rate Lock Commitments $ 2,788 $ — $ 877 $ 6 Forward Commitments 391 190 4 356 Interest Rate Swap Agreements 37,472 8,349 12,915 9,370 Foreign Exchange Contracts 41 446 808 15 Conversion Rate Swap Agreement — 453 — — Total $ 40,692 $ 9,438 $ 14,604 $ 9,747 1 Asset derivatives are included in other assets and liability derivatives are included in other liabilities in the consolidated statements of condition. The following table presents the Company’s derivative financial instruments and the amount and location of the net gains or losses recognized in the consolidated statements of income for the three and nine months ended September 30, 2019 and 2018 : Location of Derivative Financial Instruments Net Gains (Losses) Three Months Ended Nine Months Ended Not Designated as Hedging Instruments Recognized in the September 30, September 30, (dollars in thousands) Statements of Income 2019 2018 2019 2018 Interest Rate Lock Commitments Mortgage Banking $ 4,381 $ 729 $ 9,667 $ 2,227 Forward Commitments Mortgage Banking (282 ) 207 (2,257 ) 1,131 Interest Rate Swap Agreements Other Noninterest Income 2,967 558 5,863 1,308 Foreign Exchange Contracts Other Noninterest Income 480 681 2,546 2,640 Conversion Rate Swap Agreement Investment Securities Gains (Losses), Net (453 ) — (453 ) (1,000 ) Total $ 7,093 $ 2,175 $ 15,366 $ 6,306 Management has received authorization from the Bank’s Board of Directors to use derivative financial instruments as an end-user in connection with the Bank’s risk management activities and to accommodate the needs of the Bank’s customers. As with any financial instrument, derivative financial instruments have inherent risks. Market risk is defined as the risk of adverse financial impact due to fluctuations in interest rates, foreign exchange rates, and equity prices. Market risks associated with derivative financial instruments are balanced with the expected returns to enhance earnings performance and shareholder value, while limiting the volatility of each. The Company uses various processes to monitor its overall market risk exposure, including sensitivity analysis, value-at-risk calculations, and other methodologies. Derivative financial instruments are also subject to credit and counterparty risk, which is defined as the risk of financial loss if a borrower or counterparty is either unable or unwilling to repay borrowings or settle transactions in accordance with the underlying contractual terms. Credit and counterparty risks associated with derivative financial instruments are similar to those relating to traditional financial instruments. The Company manages derivative credit and counterparty risk by evaluating the creditworthiness of each borrower or counterparty, adhering to the same credit approval process used for commercial lending activities. As of September 30, 2019 and December 31, 2018 , the Company did not designate any derivative financial instruments as formal hedging relationships. The Company’s free-standing derivative financial instruments are required to be carried at their fair value on the Company’s consolidated statements of condition. These financial instruments have been limited to interest rate lock commitments (“IRLCs”), forward commitments, Swap Agreements, foreign exchange contracts, and conversion rate swap agreements. The Company enters into IRLCs for residential mortgage loans which commit us to lend funds to a potential borrower at a specific interest rate and within a specified period of time. IRLCs that relate to the origination of mortgage loans that will be held for sale are considered derivative financial instruments under applicable accounting guidance. Outstanding IRLCs expose the Company to the risk that the price of the mortgage loans underlying the commitments may decline due to increases in mortgage interest rates from inception of the rate lock to the funding of the loan. To mitigate this risk, the Company utilizes forward commitments as economic hedges against the potential decreases in the values of the loans held for sale. IRLCs and forward commitments are free-standing derivatives which are carried at fair value with changes recorded in the mortgage banking component of noninterest income in the Company’s consolidated statements of income. The Company enters into Swap Agreements to facilitate the risk management strategies of a small number of commercial banking customers. The Company mitigates the interest rate risk of entering into these agreements by entering into equal and offsetting interest rate swap agreements with highly rated third-party financial institutions. The interest rate swap agreements are free-standing derivatives and are recorded at fair value in the Company’s consolidated statements of condition. Fair value changes are recorded in other noninterest income in the Company’s consolidated statements of income. The Company is party to master netting arrangements with its financial institution counterparties; however, the Company does not offset assets and liabilities under these arrangements for financial statement presentation purposes. Collateral, usually in the form of cash or marketable securities, is posted by the counterparty with net liability positions in accordance with contract thresholds. See Note 7 Balance Sheet Offsetting for more information. The Company’s interest rate swap agreements with financial institution counterparties may contain credit-risk-related contingent features tied to a specified credit rating of the Company. Under these provisions, should the Company’s specified rating fall below a particular level (e.g., investment grade), or if the Company no longer obtains the specified rating, the counterparty may require the Company to pledge collateral on an immediate and ongoing basis (subject to the requirement that such swaps are in a net liability position beyond the level specified in the contract), or require immediate settlement of the swap agreement. Other credit-risk-related contingent features may also allow the counterparty to require immediate settlement of the swap agreement if the Company fails to maintain a specified minimum level of capitalization. With regard to derivative contracts not centrally cleared through a clearinghouse, regulations require collateral to be posted by the party with a net liability position (i.e., the threshold for posting collateral was reduced to zero, subject to certain minimum transfer amounts). The requirements generally applied to new derivative contracts entered into by the Company after March 1, 2017, although certain counterparties may elect to apply lower thresholds to existing contracts. Parties to a centrally cleared over-the-counter derivative exchange daily payments that reflect the daily change in value of the derivative. These payments are commonly referred to as variation margin. Historically, variation margin payments have typically been treated as collateral against the derivative position. Effective 2017, the Chicago Mercantile Exchange and LCH.Clearnet Limited (collectively, the “clearinghouses”) amended their rulebooks to legally characterize variation margin payments for over-the-counter derivatives they clear as settlements of the derivatives’ mark-to-market exposure rather than collateral against the exposures. This rule change effectively causes any derivative cleared through one of the clearinghouses to have a fair value that approximates zero on a daily basis. The majority of the Company’s swap agreements executed with third-party financial institutions are now required to be cleared through one of the clearinghouses. The uncleared swap agreements executed with third-party financial institutions will remain subject to the collateral requirements and credit-risk-related contingent features described in the previous paragraphs, and therefore, are not subject to the variation margin rule change. Likewise, the swap agreements executed with the Company’s commercial banking customers will remain uncleared and will also not be subject to the variation margin rule change. The Company utilizes foreign exchange contracts to offset risks related to transactions executed on behalf of customers. The foreign exchange contracts are free-standing derivatives which are carried at fair value with changes included in other noninterest income in the Company’s consolidated statements of income. As each sale of Visa Class B restricted shares was completed, the Company entered into a conversion rate swap agreement with the buyer that requires payment to the buyer in the event Visa further reduces the conversion ratio of Class B into Class A unrestricted common shares. In the event of Visa increasing the conversion ratio, the buyer would be required to make payment to the Company. The conversion rate swap agreement was valued at zero (i.e., no contingent liability recorded) as further reductions to the conversion ratio were deemed neither probable nor reasonably estimable by management. However, in September 2019, Visa announced a reduction of the conversion ratio from 1.6298 to 1.6228 effective September 27, 2019. As a result, the Company recorded a $0.5 million liability in September 2019 which represented the amount due to the buyers of the Visa Class B shares in October 2019. In June 2018, Visa announced a reduction of the conversion ratio from 1.6483 to 1.6298 effective June 28, 2018. As a result, the Company recorded $1.0 million liability in June 2018 which represented the amount paid to the buyers of the Visa Class B shares in July 2018. Further reductions to the conversion ratio were deemed neither probable nor reasonably estimable by management. See Note 3 Investment Securities for more information.

Pension Plans and Postretiremen

Pension Plans and Postretirement Benefit Plan	9 Months Ended
	Sep. 30, 2019
Retirement Benefits [Abstract]
Pension Plans and Postretirement Benefit Plan	Pension Plans and Postretirement Benefit Plan Components of net periodic benefit cost for the Company’s pension plans and the postretirement benefit plan are presented in the following table for the three and nine months ended September 30, 2019 and 2018 . Pension Benefits Postretirement Benefits (dollars in thousands) 2019 2018 2019 2018 Three Months Ended September 30, Service Cost $ — $ — $ 118 $ 114 Interest Cost 1,094 1,041 258 235 Expected Return on Plan Assets (1,249 ) (1,281 ) — — Amortization of: Prior Service Credit — — (72 ) (142 ) Net Actuarial Losses (Gains) 483 498 (77 ) (61 ) Net Periodic Benefit Cost $ 328 $ 258 $ 227 $ 146 Nine Months Ended September 30, Service Cost $ — $ — $ 353 $ 344 Interest Cost 3,281 3,123 773 706 Expected Return on Plan Assets (3,747 ) (3,845 ) — — Amortization of: Prior Service Credit — — (216 ) (426 ) Net Actuarial Losses (Gains) 1,451 1,494 (233 ) (185 ) Net Periodic Benefit Cost $ 985 $ 772 $ 677 $ 439 The service cost component of net periodic benefit cost are included in salaries and benefits and all other components of net periodic benefit cost are included in other noninterest expense in the consolidated statements of income for the Company’s pension plans and postretirement benefit plan. For the three and nine months ended September 30, 2019 , the Company contributed $0.2 million and $0.4 million , respectively, to the pension plans and $0.5 million and $1.1 million , respectively, to the postretirement benefit plan. The Company expects to contribute a total of $0.5 million to the pension plans and $1.5 million to the postretirement benefit plan for the year ending December 31, 2019 .

Commitments, Contingencies, and

Commitments, Contingencies, and Guarantees	9 Months Ended
	Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments, Contingencies, and Guarantees	Commitments, Contingencies, and Guarantees The Company’s credit commitments as of September 30, 2019 and December 31, 2018 were as follows: (dollars in thousands) September 30, December 31, Unfunded Commitments to Extend Credit $ 2,751,256 $ 2,646,085 Standby Letters of Credit 63,871 62,344 Commercial Letters of Credit 13,433 9,411 Total Credit Commitments $ 2,828,560 $ 2,717,840 Unfunded Commitments to Extend Credit Commitments to extend credit are agreements to lend to a customer as long as there is no violation of the terms or conditions established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since commitments may expire without being drawn, the total commitment amount does not necessarily represent future cash requirements. Standby and Commercial Letters of Credit Standby letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third-party. Standby letters of credit generally become payable upon the failure of the customer to perform according to the terms of the underlying contract with the third-party, while commercial letters of credit are issued specifically to facilitate commerce and typically result in the commitment being drawn on when the underlying transaction is consummated between the customer and a third party. The contractual amount of these letters of credit represents the maximum potential future payments guaranteed by the Company. The Company has recourse against the customer for any amount it is required to pay to a third-party under a standby letter of credit, and generally holds cash or deposits as collateral on those standby letters of credit for which collateral is deemed necessary. Contingencies On September 9, 2016, a purported class action lawsuit was filed by a Bank customer primarily alleging Bank of Hawaii’s practice of determining whether consumer deposit accounts were overdrawn based on “available balance” (which deducts debit card transactions that have taken place but which have not yet been posted) was not properly applied or disclosed to customers. On October 16, 2019, the Bank reached a tentative settlement with the named plaintiff. The tentative settlement, subject to documentation and court approvals, provides for forgiveness of certain related and previously charged off overdraft fees, and a payment by the Company of $8.0 million into a class settlement fund the proceeds of which will be used to refund class members, and to pay attorneys’ fees, administrative and other costs, in exchange for a complete release of all claims asserted against the Company. Although the Company previously established a $2.0 million reserve relating to this claim, the reserve has been increased to a total of $8.0 million as of September 30, 2019. In addition to the litigation noted above, the Company is subject to various other pending and threatened legal proceedings arising out of the normal course of business or operations. On at least a quarterly basis, the Company assesses its liabilities and contingencies in connection with outstanding legal proceedings using the most recent information available. On a case-by-case basis, reserves are established for those legal claims for which it is probable that a loss will be incurred and the amount of such loss can be reasonably estimated. Based on information currently available, management believes that the eventual outcome of these claims against the Company will not be materially in excess of such amounts reserved by the Company. However, in the event of unexpected future developments, it is possible that the ultimate resolution of these matters may result in a loss that materially exceeds the reserves established by the Company. Risks Related to Representation and Warranty Provisions The Company sells residential mortgage loans in the secondary market primarily to the Federal National Mortgage Association (“Fannie Mae”). The Company also pools Federal Housing Administration (“FHA”) insured and U.S. Department of Veterans Affairs (“VA”) guaranteed residential mortgage loans for sale to the Government National Mortgage Corporation (“Ginnie Mae”). These pools of FHA-insured and VA-guaranteed residential mortgage loans are securitized by Ginnie Mae. The agreements under which the Company sells residential mortgage loans to Fannie Mae or Ginnie Mae and the insurance or guaranty agreements with FHA and VA contain provisions that include various representations and warranties regarding the origination and characteristics of the residential mortgage loans. Although the specific representations and warranties vary among investors, insurance or guarantee agreements, they typically cover ownership of the loan, validity of the lien securing the loan, the absence of delinquent taxes or liens against the property securing the loan, compliance with loan criteria set forth in the applicable agreement, compliance with applicable federal, state, and local laws, and other matters. As of September 30, 2019 , the unpaid principal balance of residential mortgage loans sold by the Company was $2.7 billion . The agreements under which the Company sells residential mortgage loans require delivery of various documents to the investor or its document custodian. Although these loans are primarily sold on a non-recourse basis, the Company may be obligated to repurchase residential mortgage loans or reimburse investors for losses incurred if a loan review reveals that underwriting and documentation standards were potentially not met. Some agreements may require the Company to repurchase delinquent loans. Upon receipt of a repurchase request, the Company works with investors or insurers to arrive at a mutually agreeable resolution. Repurchase demands are typically reviewed on an individual loan-by-loan basis to validate the claims made by the investor or insurer and to determine if a contractually required repurchase event has occurred. The Company manages the risk associated with potential repurchases or other forms of settlement through its underwriting and quality assurance practices and by servicing mortgage loans to meet investor and secondary market standards. During the nine months ended September 30, 2019 , there were two residential mortgage loans repurchased with an aggregate unpaid principal balance of $0.6 million as a result of the representation and warranty provisions contained in the applicable contract. The one loan was delinquent in payment of principal and interest at the time of repurchase, however no material loss was incurred related to this repurchase. As of September 30, 2019 , there was one pending repurchase requests totaling $0.3 million related to representation and warranty provisions. Risks Relating to Residential Mortgage Loan Servicing Activities In addition to servicing loans in the Company’s portfolio, substantially all of the loans the Company sells to investors are sold with servicing rights retained. The Company also services loans originated by other mortgage loan originators. As servicer, the Company’s primary duties are to: (1) collect payments due from borrowers; (2) advance certain delinquent payments of principal and interest; (3) maintain and administer any hazard, title, or primary mortgage insurance policies relating to the mortgage loans; (4) maintain any required escrow accounts for payment of taxes and insurance and administer escrow payments; and (5) foreclose on defaulted mortgage loans or, to the extent consistent with the documents governing a securitization, consider alternatives to foreclosure, such as loan modifications or short sales. Each agreement under which the Company acts as servicer generally specifies a standard of responsibility for actions taken by the Company in such capacity and provides protection against expenses and liabilities incurred by the Company when acting in compliance with the respective servicing agreements. However, if the Company commits a material breach of obligations as servicer, the Company may be subject to termination if the breach is not cured within a specified period following notice. The standards governing servicing and the possible remedies for violations of such standards vary by investor. These standards and remedies are determined by servicing guides issued by the investors as well as the contract provisions established between the investors and the Company. Remedies could include repurchase of an affected loan. For the nine months ended September 30, 2019 , there were no loans repurchased related to loan servicing activities. As of September 30, 2019 , there were no pending repurchase requests related to loan servicing activities. Although to date repurchase requests related to representation and warranty provisions and servicing activities have been limited, it is possible that requests to repurchase mortgage loans may increase in frequency as investors more aggressively pursue all means of recovering losses on their purchased loans. However, as of September 30, 2019 , management believes that this exposure is not material due to the historical level of repurchase requests and loss trends and thus has not established a liability for losses related to mortgage loan repurchases. As of September 30, 2019 , 99% of the Company’s residential mortgage loans serviced for investors were current. The Company maintains ongoing communications with investors and continues to evaluate this exposure by monitoring the level and number of repurchase requests as well as the delinquency rates in the loans sold to investors.

Fair Value of Assets and Liabil

Fair Value of Assets and Liabilities	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value of Assets and Liabilities	Fair Value of Assets and Liabilities Fair Value Hierarchy Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in the principal or most advantageous market for an asset or liability in an orderly transaction between market participants at the measurement date. GAAP established a fair value hierarchy that prioritizes the use of inputs used in valuation methodologies into the following three levels: Level 1: Inputs to the valuation methodology are quoted prices, unadjusted, for identical assets or liabilities in active markets. A quoted price in an active market provides the most reliable evidence of fair value and is used to measure fair value whenever available. A contractually binding sales price also provides reliable evidence of fair value. Level 2: Inputs to the valuation methodology include quoted prices for similar assets or liabilities in active markets; inputs to the valuation methodology include quoted prices for identical or similar assets or liabilities in markets that are not active; or inputs to the valuation methodology that utilize model-based techniques for which all significant assumptions are observable in the market. Level 3: Inputs to the valuation methodology are unobservable and significant to the fair value measurement; inputs to the valuation methodology that utilize model-based techniques for which significant assumptions are not observable in the market; or inputs to the valuation methodology that require significant management judgment or estimation, some of which may be internally developed. In some instances, an instrument may fall into multiple levels of the fair value hierarchy. In such instances, the instrument’s level within the fair value hierarchy is based on the lowest of the three levels (with Level 3 being the lowest) that is significant to the fair value measurement. Our assessment of the significance of an input requires judgment and considers factors specific to the instrument. Assets and Liabilities Measured at Fair Value on a Recurring Basis Investment Securities Available-for-Sale Fair values of investment securities available-for-sale were primarily measured using information from a third-party pricing service. This service provides pricing information by utilizing evaluated pricing models supported with market data information. Standard inputs include benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, and reference data from market research publications. Level 1 investment securities are comprised of debt securities issued by the U.S. Treasury, as quoted prices were available, unadjusted, for identical securities in active markets. Level 2 investment securities were primarily comprised of debt securities issued by the Small Business Administration, states and municipalities, corporations, as well as mortgage-backed securities issued by government agencies and government-sponsored enterprises. Fair values were estimated primarily by obtaining quoted prices for similar assets in active markets or through the use of pricing models. In cases where there may be limited or less transparent information provided by the Company’s third-party pricing service, fair value may be estimated by the use of secondary pricing services or through the use of non-binding third-party broker quotes. On a quarterly basis, management reviews the pricing information received from the Company’s third-party pricing service. This review process includes a comparison to a second source. The Company’s third-party pricing service has also established processes for us to submit inquiries regarding quoted prices. Periodically, based on these reviews, the Company will challenge the quoted prices provided by the Company’s third-party pricing service. The Company’s third-party pricing service will review the inputs to the evaluation in light of the new market data presented by us. The Company’s third-party pricing service may then affirm the original quoted price or may update the evaluation on a going-forward basis. Generally, we do not adjust the price from the third-party service provider. On a quarterly basis, management also reviews a sample of securities priced by the Company’s third-party pricing service to review the significant assumptions and valuation methodologies used by the service. The information provided is comprised of market reference data, which may include reported trades; bids, offers, or broker-dealer dealer quotes; benchmark yields and spreads; as well as other reference data as appropriate. Based on this review, management determines whether the current placement of the security in the fair value hierarchy is appropriate or whether transfers may be warranted. Loans Held for Sale The fair value of the Company’s residential mortgage loans held for sale was determined based on quoted prices for similar loans in active markets, and therefore, is classified as a Level 2 measurement. Mortgage Servicing Rights Mortgage servicing rights do not trade in an active market with readily observable market data. As a result, the Company estimates the fair value of mortgage servicing rights by using a discounted cash flow model to calculate the present value of estimated future net servicing income. The Company stratifies its mortgage servicing portfolio on the basis of loan type. The assumptions used in the discounted cash flow model are those that the Company believes market participants would use in estimating future net servicing income. Significant assumptions in the valuation of mortgage servicing rights include estimated loan repayment rates, the discount rate, servicing costs, and the timing of cash flows, among other factors. Mortgage servicing rights are classified as Level 3 measurements due to the use of significant unobservable inputs, as well as significant management judgment and estimation. Other Assets Other assets recorded at fair value on a recurring basis are primarily comprised of investments related to deferred compensation arrangements. Quoted prices for these investments, primarily in mutual funds, are available in active markets. Thus, the Company’s investments related to deferred compensation arrangements are classified as Level 1 measurements in the fair value hierarchy. Derivative Financial Instruments Derivative financial instruments recorded at fair value on a recurring basis are comprised of IRLCs, forward commitments, interest rate swap agreements, foreign exchange contracts, and Visa Class B to Class A shares conversion rate swap agreements. The fair values of IRLCs are calculated based on the value of the underlying loan held for sale, which in turn is based on quoted prices for similar loans in the secondary market. However, this value is adjusted by a factor which considers the likelihood that the loan in a locked position will ultimately close. This factor, the closing ratio, is derived from the Bank’s internal data and is adjusted using significant management judgment. As such, IRLCs are classified as Level 3 measurements. Forward commitments are classified as Level 2 measurements as they are primarily based on quoted prices from the secondary market based on the settlement date of the contracts, interpolated or extrapolated, if necessary, to estimate a fair value as of the end of the reporting period. The fair values of interest rate swap agreements are calculated using a discounted cash flow approach and utilize Level 2 observable inputs such as a market yield curve, effective date, maturity date, notional amount, and stated interest rate. In addition, the Company includes in its fair value calculation a credit factor adjustment which is based primarily on management judgment. Thus, interest rate swap agreements are classified as a Level 3 measurement. The fair values of foreign exchange contracts are calculated using the Bank’s multi-currency accounting system which utilizes contract specific information such as currency, maturity date, contractual amount, and strike price, along with market data information such as the spot rates of specific currency and yield curves. Foreign exchange contracts are classified as Level 2 measurements because while they are valued using the Bank’s multi-currency accounting system, significant management judgment or estimation is not required. The fair value of the Visa Class B restricted shares to Class A unrestricted common shares conversion rate swap agreements represent the amount owed by the Company to the buyer of the Visa Class B shares as a result of a reduction of the conversion ratio subsequent to the sales date. As of September 30, 2019 and December 31, 2018 , the conversion rate swap agreements were valued at $0.5 million and zero, respectively. This conversion rate swap agreement is classified as a Level 2 measurement. See Note 12 Derivative Financial Instruments for more information. The Company is exposed to credit risk if borrowers or counterparties fail to perform. The Company seeks to minimize credit risk through credit approvals, limits, monitoring procedures, and collateral requirements. The Company generally enters into transactions with borrowers and counterparties that carry high quality credit ratings. Credit risk associated with borrowers or counterparties as well as the Company’s non-performance risk is factored into the determination of the fair value of derivative financial instruments. The table below presents the balances of assets and liabilities measured at fair value on a recurring basis as of September 30, 2019 and December 31, 2018 : Quoted Prices in Active Markets for Identical Assets or Liabilities Significant Other Observable Inputs Significant Unobservable Inputs (dollars in thousands) (Level 1) (Level 2) (Level 3) Total September 30, 2019 Assets: Investment Securities Available-for-Sale Debt Securities Issued by the U.S. Treasury and Government Agencies $ 1,005 $ 234,680 $ — $ 235,685 Debt Securities Issued by States and Political Subdivisions — 53,982 — 53,982 Debt Securities Issued by U.S. Government-Sponsored Enterprises — 21,895 — 21,895 Debt Securities Issued by Corporations — 348,441 — 348,441 Mortgage-Backed Securities: Residential - Government Agencies — 1,228,637 — 1,228,637 Residential - U.S. Government-Sponsored Enterprises — 537,336 — 537,336 Commercial - Government Agencies — 168,418 — 168,418 Total Mortgage-Backed Securities — 1,934,391 — 1,934,391 Total Investment Securities Available-for-Sale 1,005 2,593,389 — 2,594,394 Loans Held for Sale — 36,720 — 36,720 Mortgage Servicing Rights — — 1,174 1,174 Other Assets 37,865 — — 37,865 Derivatives 1 — 432 40,260 40,692 Total Assets Measured at Fair Value on a $ 38,870 $ 2,630,541 $ 41,434 $ 2,710,845 Liabilities: Derivatives 1 $ — $ 1,089 $ 8,349 $ 9,438 Total Liabilities Measured at Fair Value on a $ — $ 1,089 $ 8,349 $ 9,438 December 31, 2018 Assets: Investment Securities Available-for-Sale Debt Securities Issued by the U.S. Treasury and Government Agencies $ 972 $ 391,429 $ — $ 392,401 Debt Securities Issued by States and Political Subdivisions — 563,996 — 563,996 Debt Securities Issued by U.S. Government-Sponsored Enterprises — 56 — 56 Debt Securities Issued by Corporations — 223,140 — 223,140 Mortgage-Backed Securities: Residential - Government Agencies — 190,442 — 190,442 Residential - U.S. Government-Sponsored Enterprises — 578,527 — 578,527 Commercial - Government Agencies — 59,380 — 59,380 Total Mortgage-Backed Securities — 828,349 — 828,349 Total Investment Securities Available-for-Sale 972 2,006,970 — 2,007,942 Loans Held for Sale — 10,987 — 10,987 Mortgage Servicing Rights — — 1,290 1,290 Other Assets 31,871 — — 31,871 Derivatives 1 — 812 13,792 14,604 Total Assets Measured at Fair Value on a $ 32,843 $ 2,018,769 $ 15,082 $ 2,066,694 Liabilities: Derivatives 1 $ — $ 371 $ 9,376 $ 9,747 Total Liabilities Measured at Fair Value on a $ — $ 371 $ 9,376 $ 9,747 1 The fair value of each class of derivatives is shown in Note 12 Derivative Financial Instruments . For the three and nine months ended September 30, 2019 and 2018 , the changes in Level 3 assets and liabilities measured at fair value on a recurring basis were as follows: (dollars in thousands) Mortgage Servicing Rights 1 Net Derivative Assets and Liabilities 2 Three Months Ended September 30, 2019 Balance as of July 1, 2019 $ 1,212 $ 19,956 Realized and Unrealized Net Gains (Losses): Included in Net Income (38 ) 4,360 Transfers to Loans Held for Sale — (3,736 ) Variation Margin Payments — 11,331 Balance as of September 30, 2019 $ 1,174 $ 31,911 Total Unrealized Net Gains (Losses) Included in Net Income $ — $ 31,911 Three Months Ended September 30, 2018 Balance as of July 1, 2018 $ 1,366 $ 391 Realized and Unrealized Net Gains (Losses): Included in Net Income (39 ) 730 Transfers to Loans Held for Sale — (1,012 ) Variation Margin Payments — (293 ) Balance as of September 30, 2018 $ 1,327 $ (184 ) Total Unrealized Net Gains (Losses) Included in Net Income $ — $ (184 ) Nine Months Ended September 30, 2019 Balance as of January 1, 2019 $ 1,290 $ 4,416 Realized and Unrealized Net Gains (Losses): Included in Net Income (116 ) 9,602 Transfers to Loans Held for Sale — (7,750 ) Variation Margin Payments — 25,643 Balance as of September 30, 2019 $ 1,174 $ 31,911 Total Unrealized Net Gains (Losses) Included in Net Income $ — $ 31,911 Nine Months Ended September 30, 2018 Balance as of January 1, 2018 $ 1,454 $ 894 Realized and Unrealized Net Gains (Losses): Included in Net Income (127 ) 2,234 Transfers to Loans Held for Sale — (2,591 ) Variation Margin Payments — (721 ) Balance as of September 30, 2018 $ 1,327 $ (184 ) Total Unrealized Net Gains (Losses) Included in Net Income $ — $ (184 ) 1 Realized and unrealized gains and losses related to mortgage servicing rights are reported as a component of mortgage banking income in the Company’s consolidated statements of income. 2 Realized and unrealized gains and losses related to interest rate lock commitments are reported as a component of mortgage banking income in the Company’s consolidated statements of income. Realized and unrealized gains and losses related to interest rate swap agreements are reported as a component of other noninterest income in the Company’s consolidated statements of income. For Level 3 assets and liabilities measured at fair value on a recurring or nonrecurring basis as of September 30, 2019 and December 31, 2018 , the significant unobservable inputs used in the fair value measurements were as follows: Significant Unobservable Inputs (weighted-average) Fair Value (dollars in thousands) Valuation Technique Description Sept. 30, Dec. 31, Sept. 30, Dec. 31, Mortgage Servicing Rights Discounted Cash Flow Constant Prepayment Rate 1 11.81 % 7.01 % $ 24,848 $ 30,508 Discount Rate 2 6.96 % 9.59 % Net Derivative Assets and Liabilities: Interest Rate Lock Commitments Pricing Model Closing Ratio 91.87 % 89.00 % $ 2,788 $ 871 Interest Rate Swap Agreements Discounted Cash Flow Credit Factor 0.20 % 0.06 % $ 29,123 $ 3,545 1 Represents annualized loan repayment rate assumption. 2 Derived from multiple interest rate scenarios that incorporate a spread to a market yield curve and market volatilities. The significant unobservable inputs used in the fair value measurement of the Company’s mortgage servicing rights are the weighted-average constant prepayment rate and weighted-average discount rate. Significant increases (decreases) in any of those inputs in isolation could result in a significantly lower (higher) fair value measurement. Although the constant prepayment rate and the discount rate are not directly interrelated, they generally move in opposite directions of each other. The Company estimates the fair value of mortgage servicing rights by using a discounted cash flow model to calculate the present value of estimated future net servicing income. The Company’s Treasury Division enters observable and unobservable inputs into the model to arrive at an estimated fair value. To assess the reasonableness of the fair value measurement, the Treasury Division performs a back-test by comparing the model’s results to historical prepayment data. The Treasury Division also compares the fair value of the Company’s mortgage servicing rights to a value calculated by an independent third-party. Discussions are held with members from the Treasury, Mortgage Banking, and Controllers Divisions, along with the independent third-party to discuss and reconcile the fair value estimates and key assumptions used by the respective parties in arriving at those estimates. A subcommittee of the Company’s Asset/Liability Management Committee is responsible for providing oversight over the valuation methodology and key assumptions. The significant unobservable input used in the fair value measurement of the Company’s IRLCs is the closing ratio, which represents the percentage of loans currently in a lock position which management estimates will ultimately close. Generally, the fair value of an IRLC is positive (negative) if the prevailing interest rate is lower (higher) than the IRLC rate. Therefore, an increase in the closing ratio (i.e., higher percentage of loans are estimated to close) will increase the gain or loss. The closing ratio is largely dependent on the loan processing stage that a loan is currently in and the change in prevailing interest rates from the time of the rate lock. The closing ratio is computed by the Company’s secondary marketing system using historical data and the ratio is periodically reviewed by the Company for reasonableness. The unobservable input used in the fair value measurement of the Company’s interest rate swap agreements is the credit factor. This factor represents the risk that a counterparty is either unable or unwilling to settle a transaction in accordance with the underlying contractual terms. A significant increase (decrease) in the credit factor could result in a significantly lower (higher) fair value measurement. The credit factor is determined by the Treasury Division based on the risk rating assigned to each counterparty in which the Company holds a net asset position. The Company’s Credit Policy Committee periodically reviews and approves the Expected Default Frequency of the Economic Capital Model for Credit Risk. The Expected Default Frequency is used as the credit factor for interest rate swap agreements. Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis The Company may be required periodically to measure certain assets and liabilities at fair value on a nonrecurring basis in accordance with GAAP. These adjustments to fair value usually result from the application of lower-of-cost-or-fair value accounting or impairment write-downs of individual assets. The following table represents the assets measured at fair value on a nonrecurring basis as of September 30, 2019 . There were no assets measured at fair value on a nonrecurring basis as of December 31, 2018 . (dollars in thousands) Fair Value Hierarchy Net Carrying Amount Valuation Allowance September 30, 2019 Mortgage Servicing Rights - amortization method Level 3 $ 23,674 $ (28 ) Other Assets- Equipment Held for Sale Level 3 — (217 ) The write-down of mortgage servicing rights accounted for under the amortization method was primarily due to changes in certain key assumptions used to estimate fair value. As previously mentioned, all of the Company's mortgage servicing rights are classified as Level 3 measurements due to the use of significant unobservable inputs, as well as significant management judgment and estimation. The Company's equipment held for sale at September 30, 2019 represented aircraft parts that were previously on lease agreements. An impairment charge of $0.2 million (included in other noninterest expense in the Company's consolidated statements of income) was recorded in the third quarter of 2019 to reduce the carrying value to estimated fair value less cost to sell based on recent appraisals, market conditions, and management judgment. Due to the use of significant unobservable inputs combined with significant management judgment regarding the fair value of the equipment held for sale, the carrying value was deemed a Level 3 measurement. Fair Value Option The Company elects the fair value option for all residential mortgage loans held for sale. This election allows for a more effective offset of the changes in fair values of the loans held for sale and the derivative financial instruments used to financially hedge them without having to apply complex hedge accounting requirements. As noted above, the fair value of the Company’s residential mortgage loans held for sale was determined based on quoted prices for similar loans in active markets. The following table reflects the difference between the aggregate fair value and the aggregate unpaid principal balance of the Company’s residential mortgage loans held for sale as of September 30, 2019 and December 31, 2018 . (dollars in thousands) Aggregate Fair Value Aggregate Unpaid Principal Aggregate Fair Value Unpaid Principal September 30, 2019 Loans Held for Sale $ 36,720 $ 36,039 $ 681 December 31, 2018 Loans Held for Sale $ 10,987 $ 10,656 $ 331 Changes in the estimated fair value of residential mortgage loans held for sale are reported as a component of mortgage banking income in the Company’s consolidated statements of income. For the three and nine months ended September 30, 2019 and 2018 , the net gains or losses from the change in fair value of the Company’s residential mortgage loans held for sale were not material. Financial Instruments Not Recorded at Fair Value on a Recurring Basis The following presents the carrying amount, fair value, and placement in the fair value hierarchy of the Company’s financial instruments not recorded at fair value on a recurring basis as of September 30, 2019 and December 31, 2018 . This table excludes financial instruments for which the carrying amount approximates fair value. For short-term financial assets such as cash and cash equivalents, the carrying amount is a reasonable estimate of fair value due to the relatively short time between the origination of the instrument and its expected realization. For non-marketable equity securities such as Federal Home Loan Bank and Federal Reserve Bank stock, the carrying amount is a reasonable estimate of fair value as these securities can only be redeemed or sold at their par value and only to the respective issuing government supported institution or to another member institution. For financial liabilities such as noninterest-bearing demand, interest-bearing demand, and savings deposits, the carrying amount is a reasonable estimate of fair value due to these products having no stated maturity. Fair Value Measurements Carrying Quoted Prices in Active Markets for Identical Assets or Liabilities Significant Other Observable Inputs Significant Unobservable Inputs (dollars in thousands) Amount Fair Value (Level 1) (Level 2) (Level 3) September 30, 2019 Financial Instruments - Assets Investment Securities Held-to-Maturity $ 2,946,910 $ 2,972,273 $ 355,442 $ 2,616,831 $ — Loans 1 10,514,438 10,784,711 — — 10,784,711 Financial Instruments - Liabilities Time Deposits 1,806,083 1,805,230 — 1,805,230 Securities Sold Under Agreements to Repurchase 604,299 633,599 — 633,599 Other Debt 2 100,000 100,627 — 100,627 December 31, 2018 Financial Instruments - Assets Investment Securities Held-to-Maturity $ 3,482,092 $ 3,413,994 $ 352,216 $ 3,061,778 $ — Loans 1 10,084,527 10,008,417 — — 10,008,417 Financial Instruments - Liabilities Time Deposits 1,745,522 1,734,447 — 1,734,447 — Securities Sold Under Agreements to Repurchase 504,296 504,288 — 504,288 — Other Debt 2 125,000 124,559 — 124,559 — 1 Carrying amount is net of unearned income and the Allowance. 2 Excludes capitalized lease obligations.

Revenue Recognition

Revenue Recognition	9 Months Ended
	Sep. 30, 2019
Revenue from Contract with Customer [Abstract]
Revenue Recognition	Revenue Recognition On January 1, 2018, the Company adopted ASU No. 2014-09 “Revenue from Contracts with Customers” (Topic 606) and all subsequent ASUs that modified Topic 606. The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. Topic 606 does not apply to revenue associated with financial instruments, including revenue from loans and securities, which comprise the majority of the Company’s revenue. In addition, certain noninterest income streams such as fees associated with mortgage servicing rights, financial guarantees, derivatives, and certain credit card fees are also not within the scope of the new guidance. Topic 606 is applicable to noninterest revenue streams such as trust and asset management income, deposit related fees, interchange fees, merchant income, and annuity and insurance commissions. However, the recognition of these covered revenue streams did not change significantly upon adoption of Topic 606. Substantially all of the Company’s revenue is generated from contracts with customers. Noninterest revenue streams in-scope of Topic 606 are discussed below. Trust and Asset Management Trust and asset management income is primarily comprised of fees earned from the management and administration of trusts and other customer assets. The Company’s performance obligation is generally satisfied over time and the resulting fees are recognized monthly, based upon the month-end market value of the assets under management and the applicable fee rate. Payment is generally received a few days after month end through a direct charge to customers’ accounts. The Company does not earn performance-based incentives. Optional services such as real estate sales and tax return preparation services are also available to existing trust and asset management customers. The Company’s performance obligation for these transactional-based services is generally satisfied, and related revenue recognized, at a point in time (i.e., as incurred). Payment is received shortly after services are rendered. Service Charges on Deposit Accounts Service charges on deposit accounts consist of account analysis fees (i.e., net fees earned on analyzed business and public checking accounts), monthly service fees, check orders, and other deposit account related fees. The Company’s performance obligation for account analysis fees and monthly service fees is generally satisfied, and the related revenue recognized, over the period in which the service is provided. Check orders and other deposit account related fees are largely transaction based, and therefore, the Company’s performance obligation is satisfied and related revenue recognized, at a point in time. Payment for service charges on deposit accounts is primarily received immediately or in the following month through a direct charge to customers’ accounts. Fees, Exchange, and Other Service Charges Fees, exchange, and other service charges are primarily comprised of debit card income, ATM fees, merchant services income, and other service charges. Debit card income is primarily comprised of interchange fees earned whenever the Company’s debit cards are processed through card payment networks such as Visa. ATM fees are primarily generated when a Company cardholder uses a non-Company ATM or a non-Company cardholder uses a Company ATM. Merchant services income mainly represents fees charged to merchants to process their debit and credit card transactions, in addition to account management fees. Other service charges include revenue from processing wire transfers, bill pay service, cashier’s checks, and other services. The Company’s performance obligation for fees, exchange, and other service charges are largely satisfied, and related revenue recognized, when the services are rendered or upon completion. Payment is typically received immediately or in the following month. Annuity and Insurance Annuity and insurance income primarily consists of commissions received on annuity product sales. The Company acts as an intermediary between the Company’s customer and the insurance carrier. The Company’s performance obligation is generally satisfied upon the issuance of the annuity policy. Shortly after the policy is issued, the carrier remits the commission payment to the Company, and the Company recognizes the revenue. The Company does not earn a significant amount of trailer fees on annuity sales. The majority of the trailer fees relates to variable annuity products and are calculated based on a percentage of market value at period end. Revenue is not recognized until the annuity’s market value can be determined. Other Other noninterest income consists of other recurring revenue streams such as commissions from sales of mutual funds and other investments, investment advisor fees from the Company’s Managed Account Platform Services (MAPS) wealth management product, safety deposit box rental fees, and other miscellaneous revenue streams. Commissions from the sale of mutual funds and other investments are recognized on trade date, which is when the Company has satisfied its performance obligation. The Company also receives periodic service fees (i.e., trailers) from mutual fund companies typically based on a percentage of net asset value. Trailer revenue is recorded over time, usually monthly or quarterly, as net asset value is determined. Investment advisor fees from the MAPS wealth management product is earned over time and based on an annual percentage rate of the net asset value. The investment advisor fees are charged to the customer’s account in advance on the first month of the quarter, and the revenue is recognized over the following three-month period. Safe deposit box rental fees are charged to the customer on an annual basis and recognized upon receipt of payment. The Company determined that since rentals and renewals occur fairly consistently over time, revenue is recognized on a basis consistent with the duration of the performance obligation. The following presents noninterest income, segregated by revenue streams in-scope and out-of-scope of Topic 606, for the three and nine months ended September 30, 2019 and 2018 . Three Months Ended Nine Months Ended (dollars in thousands) 2019 2018 2019 2018 Noninterest Income In-scope of Topic 606: Trust and Asset Management $ 10,930 $ 10,782 $ 33,076 $ 33,319 Service Charges on Deposit Accounts 3,268 3,194 9,912 9,982 Fees, Exchange, and Other Service Charges 11,705 11,506 34,859 34,556 Annuity and Insurance 1,251 1,311 5,567 4,251 Other 2,224 2,366 7,200 7,176 Noninterest Income (in-scope of Topic 606) 29,378 29,159 90,614 89,284 Noninterest Income (out-of-scope of Topic 606) 17,129 12,323 45,022 37,531 Total Noninterest Income $ 46,507 $ 41,482 $ 135,636 $ 126,815 Contract Balances A contract asset balance occurs when an entity performs a service for a customer before the customer pays consideration (resulting in a contract receivable) or before payment is due (resulting in a contract asset). A contract liability balance is an entity’s obligation to transfer a service to a customer for which the entity has already received payment (or payment is due) from the customer. The Company’s noninterest revenue streams are largely based on transactional activity, or standard month-end revenue accruals such as asset management fees based on month-end market values. Consideration is often received immediately or shortly after the Company satisfies its performance obligation and revenue is recognized. The Company does not typically enter into long-term revenue contracts with customers, and therefore, does not experience significant contract balances. As of September 30, 2019 and December 31, 2018 , the Company did not have any significant contract balances. Contract Acquisition Costs In connection with the adoption of Topic 606, an entity is required to capitalize, and subsequently amortize into expense, certain incremental costs of obtaining a contract with a customer if these costs are expected to be recovered. The incremental costs of obtaining a contract are those costs that an entity incurs to obtain a contract with a customer that it would not have incurred if the contract had not been obtained (for example, sales commission). The Company utilizes the practical expedient which allows entities to immediately expense contract acquisition costs when the asset that would have resulted from capitalizing these costs would have been amortized in one year or less. Upon adoption of Topic 606, the Company did not capitalize any contract acquisition cost.

Leases Leases

Leases Leases	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Lessee, Operating Leases	Leases A lease is defined as a contract, or part of a contract, that conveys the right to control the use of identified property, plant or equipment for a period of time in exchange for consideration. On January 1, 2019, the Company adopted ASU No. 2016-02 “Leases” (Topic 842) and all subsequent ASUs that modified Topic 842. For the Company, Topic 842 primarily affected the accounting treatment for operating lease agreements in which the Company is the lessee. Lessee Accounting Substantially all of the leases in which the Company is the lessee are comprised of real estate property for branches, ATM locations, and office space with terms extending through 2052. Portions of certain properties are subleased for terms extending through 2033. Substantially all of the Company’s leases are classified as operating leases, and therefore, were previously not recognized on the Company’s consolidated statements of condition. With the adoption of Topic 842, operating lease agreements are required to be recognized on the consolidated statements of condition as right-of-use (“ROU”) assets and corresponding lease liabilities. The Company has one existing finance lease (previously referred to as a capital lease) for a portion of the Company’s headquarters’ building with a lease term through 2052. As this lease was previously required to be recorded on the Company’s consolidated statements of condition, Topic 842 did not materially impact the accounting for this lease. The following table represents the consolidated statements of condition classification of the Company’s ROU assets and lease liabilities. The Company elected not to include short-term leases (i.e., leases with initial terms of twelve months or less), or equipment leases (deemed immaterial) on the consolidated statements of condition. (dollars in thousands) September 30, 2019 Lease Right-of-Use Assets Classification Operating lease right-of-use assets Operating Lease Right-of-Use Assets $ 101,005 Finance lease right-of-use assets Premises and Equipment, Net 2,394 Total Lease Right-of-Use Assets $ 103,399 Lease Liabilities Operating lease liabilities Operating Lease Liabilities $ 108,264 Finance lease liabilities Other Debt 10,585 Total Lease Liabilities $ 118,849 The calculated amount of the ROU assets and lease liabilities in the table above are impacted by the length of the lease term and the discount rate used to present value the minimum lease payments. The Company’s lease agreements often include one or more options to renew at the Company’s discretion. If at lease inception, the Company considers the exercising of a renewal option to be reasonably certain, the Company will include the extended term in the calculation of the ROU asset and lease liability. Regarding the discount rate, Topic 842 requires the use of the rate implicit in the lease whenever this rate is readily determinable. As this rate is rarely determinable, the Company utilizes its incremental borrowing rate at lease inception, on a collateralized basis, over a similar term. For operating leases existing prior to January 1, 2019, the rate for the remaining lease term as of January 1, 2019 was used. For the Company’s only finance lease, the Company utilized its incremental borrowing rate at lease inception. September 30, 2019 Weighted-average remaining lease term Operating leases 17.1 years Finance leases 33.3 years Weighted-average discount rate Operating leases 3.67 % Finance leases 7.04 % The following table represents lease costs and other lease information. As the Company elected, for all classes of underlying assets, not to separate lease and non-lease components and instead to account for them as a single lease component, the variable lease cost primarily represents variable payments such as common area maintenance and utilities. Variable lease cost also includes payments for ATM location leases in which payments are based on a percentage of ATM transactions (i.e., ATM surcharge fees), rather than a fixed amount. (dollars in thousands) Three Months Ended Nine Months Ended Lease Costs Operating lease cost $ 3,136 $ 9,495 Variable lease cost 998 2,592 Short-term lease cost 153 370 Finance lease cost Interest on lease liabilities 1 187 561 Amortization of right-of-use assets 18 54 Sublease income (2,122 ) (6,383 ) Net lease cost $ 2,370 $ 6,689 Other Information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 3,259 $ 9,584 Operating cash flows from finance leases 187 561 Financing cash flows from finance leases 20 58 Right-of-use assets obtained in exchange for new operating lease liabilities 392 2,117 Right-of-use assets obtained in exchange for new finance lease liabilities — — 1 Included in other debt interest expense in the Company’s consolidated statements of income. All other lease costs in this table are included in net occupancy expense. Future minimum payments for finance leases and operating leases with initial or remaining terms of one year or more as of September 30, 2019 were as follows: (dollars in thousands) Finance Leases Operating Leases Twelve Months Ended: September 30, 2020 $ 825 $ 12,059 September 30, 2021 825 11,338 September 30, 2022 825 10,700 September 30, 2023 825 9,824 September 30, 2024 825 8,558 Thereafter 23,311 102,033 Total Future Minimum Lease Payments 27,436 154,512 Amounts Representing Interest (16,851 ) (46,248 ) Present Value of Net Future Minimum Lease Payments $ 10,585 $ 108,264
Lessee, Finance Leases	Leases A lease is defined as a contract, or part of a contract, that conveys the right to control the use of identified property, plant or equipment for a period of time in exchange for consideration. On January 1, 2019, the Company adopted ASU No. 2016-02 “Leases” (Topic 842) and all subsequent ASUs that modified Topic 842. For the Company, Topic 842 primarily affected the accounting treatment for operating lease agreements in which the Company is the lessee. Lessee Accounting Substantially all of the leases in which the Company is the lessee are comprised of real estate property for branches, ATM locations, and office space with terms extending through 2052. Portions of certain properties are subleased for terms extending through 2033. Substantially all of the Company’s leases are classified as operating leases, and therefore, were previously not recognized on the Company’s consolidated statements of condition. With the adoption of Topic 842, operating lease agreements are required to be recognized on the consolidated statements of condition as right-of-use (“ROU”) assets and corresponding lease liabilities. The Company has one existing finance lease (previously referred to as a capital lease) for a portion of the Company’s headquarters’ building with a lease term through 2052. As this lease was previously required to be recorded on the Company’s consolidated statements of condition, Topic 842 did not materially impact the accounting for this lease. The following table represents the consolidated statements of condition classification of the Company’s ROU assets and lease liabilities. The Company elected not to include short-term leases (i.e., leases with initial terms of twelve months or less), or equipment leases (deemed immaterial) on the consolidated statements of condition. (dollars in thousands) September 30, 2019 Lease Right-of-Use Assets Classification Operating lease right-of-use assets Operating Lease Right-of-Use Assets $ 101,005 Finance lease right-of-use assets Premises and Equipment, Net 2,394 Total Lease Right-of-Use Assets $ 103,399 Lease Liabilities Operating lease liabilities Operating Lease Liabilities $ 108,264 Finance lease liabilities Other Debt 10,585 Total Lease Liabilities $ 118,849 The calculated amount of the ROU assets and lease liabilities in the table above are impacted by the length of the lease term and the discount rate used to present value the minimum lease payments. The Company’s lease agreements often include one or more options to renew at the Company’s discretion. If at lease inception, the Company considers the exercising of a renewal option to be reasonably certain, the Company will include the extended term in the calculation of the ROU asset and lease liability. Regarding the discount rate, Topic 842 requires the use of the rate implicit in the lease whenever this rate is readily determinable. As this rate is rarely determinable, the Company utilizes its incremental borrowing rate at lease inception, on a collateralized basis, over a similar term. For operating leases existing prior to January 1, 2019, the rate for the remaining lease term as of January 1, 2019 was used. For the Company’s only finance lease, the Company utilized its incremental borrowing rate at lease inception. September 30, 2019 Weighted-average remaining lease term Operating leases 17.1 years Finance leases 33.3 years Weighted-average discount rate Operating leases 3.67 % Finance leases 7.04 % The following table represents lease costs and other lease information. As the Company elected, for all classes of underlying assets, not to separate lease and non-lease components and instead to account for them as a single lease component, the variable lease cost primarily represents variable payments such as common area maintenance and utilities. Variable lease cost also includes payments for ATM location leases in which payments are based on a percentage of ATM transactions (i.e., ATM surcharge fees), rather than a fixed amount. (dollars in thousands) Three Months Ended Nine Months Ended Lease Costs Operating lease cost $ 3,136 $ 9,495 Variable lease cost 998 2,592 Short-term lease cost 153 370 Finance lease cost Interest on lease liabilities 1 187 561 Amortization of right-of-use assets 18 54 Sublease income (2,122 ) (6,383 ) Net lease cost $ 2,370 $ 6,689 Other Information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 3,259 $ 9,584 Operating cash flows from finance leases 187 561 Financing cash flows from finance leases 20 58 Right-of-use assets obtained in exchange for new operating lease liabilities 392 2,117 Right-of-use assets obtained in exchange for new finance lease liabilities — — 1 Included in other debt interest expense in the Company’s consolidated statements of income. All other lease costs in this table are included in net occupancy expense. Future minimum payments for finance leases and operating leases with initial or remaining terms of one year or more as of September 30, 2019 were as follows: (dollars in thousands) Finance Leases Operating Leases Twelve Months Ended: September 30, 2020 $ 825 $ 12,059 September 30, 2021 825 11,338 September 30, 2022 825 10,700 September 30, 2023 825 9,824 September 30, 2024 825 8,558 Thereafter 23,311 102,033 Total Future Minimum Lease Payments 27,436 154,512 Amounts Representing Interest (16,851 ) (46,248 ) Present Value of Net Future Minimum Lease Payments $ 10,585 $ 108,264

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation Bank of Hawaii Corporation (the “Parent”) is a Delaware corporation and a bank holding company headquartered in Honolulu, Hawaii. Bank of Hawaii Corporation and its subsidiaries (collectively, the “Company”) provide a broad range of financial products and services to customers in Hawaii, Guam, and other Pacific Islands. The accompanying consolidated financial statements include the accounts of the Parent and its subsidiaries. The Parent’s principal operating subsidiary is Bank of Hawaii (the “Bank”). The consolidated financial statements in this report have not been audited by an independent registered public accounting firm, but, in the opinion of management, reflect all adjustments necessary for a fair presentation of the results for the interim periods. All such adjustments are of a normal recurring nature. Intercompany accounts and transactions have been eliminated in consolidation. Certain prior period information has been reclassified to conform to the current period presentation. Operating results for the interim periods disclosed herein are not necessarily indicative of the results that may be expected for the full fiscal year or for any future period. The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and accompanying notes required by GAAP for complete financial statements and should be read in conjunction with the audited consolidated financial statements and related notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018
Use of Estimates in the Preparation of Financial Statements	Use of Estimates in the Preparation of Financial Statements The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts in the financial statements and accompanying notes. Actual results may differ from those estimates and such differences could be material to the financial statements.
Variable Interest Entities	Variable Interest Entities Variable interests are defined as contractual ownership or other interests in an entity that change with fluctuations in an entity’s net asset value. The primary beneficiary consolidates the variable interest entity (“VIE”). The primary beneficiary is defined as the enterprise that has both (i) the power to direct the activities of the VIE that most significantly impact the entity’s economic performance and (ii) the obligation to absorb losses or the right to receive benefits that could be significant to the VIE. The Company participates in limited partnerships or limited liability companies that sponsor low-income housing projects. These entities provide funds for the construction and operation of apartment complexes that provide affordable housing to lower-income households. If these developments successfully attract a specified percentage of residents falling in that lower-income range, state and/or federal income tax credits are made available to the partners. The tax credits are generally recognized over 10 years for federal and 5 years for state. In order to continue receiving the tax credits each year over the life of the entity, the low-income residency targets must be maintained. Prior to January 1, 2015, the Company utilized the effective yield method whereby the Company recognized tax credits generally over 10 years and amortized the initial cost of the investment to provide a constant effective yield over the period that tax credits are allocated to the Company. On January 1, 2015, the Company adopted ASU No. 2014-01, “Accounting for Investments in Qualified Affordable Housing Projects” prospectively for new investments. ASU No. 2014-01 permits reporting entities to make an accounting policy election to account for their investments in qualified affordable housing projects using the proportional amortization method if certain conditions are met. As permitted by ASU No. 2014-01, the Company elected to continue to utilize the effective yield method for investments made prior to January 1, 2015. Unfunded commitments to fund these low-income housing entities were $16.9 million and $15.2 million as of September 30, 2019 and December 31, 2018 , respectively. These unfunded commitments are unconditional and legally binding and are recorded in other liabilities in the consolidated statements of condition. See Note 6 Affordable Housing Projects Tax Credit Partnerships for more information. The Company also has limited partnership interests in solar energy tax credit partnership investments. These partnerships develop, build, own and operate solar renewable energy projects. Over the course of these investments, the Company expects to receive federal and state tax credits, tax-related benefits, and excess cash available for distribution, if any. The Company may be called to sell its interest in the limited partnerships through a call option once all investment tax credits have been recognized. Tax benefits associated with these investments are generally recognized over 6 years . Although these entities meet the definition of a VIE, the Company is not the primary beneficiary of the entities as the general partner has both the power to direct the activities that most significantly impact the economic performance of the entities and the obligation to absorb losses or the right to receive benefits that could be significant to the entities. While the partnership agreements allow the limited partners, through a majority vote, to remove the general partner, this right is not deemed to be substantive as the general partner can only be removed for cause. The investments in these entities are initially recorded at cost, which approximates the maximum exposure to loss as a result of the Company’s involvement with these unconsolidated entities. The balance of the Company’s investments in these entities was $81.2 million and $85.9 million as of September 30, 2019 and December 31, 2018 , respectively, and is included in other assets in the consolidated statements of condition.
Accounting Standards Adopted in the Current Year or Pending Adoption	Accounting Standards Adopted in 2019 In February 2016, the FASB issued ASU No. 2016-02, “Leases.” Under the new guidance, lessees will be required to recognize the following for all leases (with the exception of short-term leases): 1) a lease liability, which is the present value of a lessee’s obligation to make lease payments, and 2) a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. Lessor accounting under the new guidance remains largely unchanged as it is substantially equivalent to existing guidance for sales-type leases, direct financing leases, and operating leases. Leveraged leases have been eliminated, although lessors can continue to account for existing leveraged leases using the current accounting guidance. Other limited changes were made to align lessor accounting with the lessee accounting model and the new revenue recognition standard . All entities will classify leases to determine how to recognize lease-related revenue and expense. Quantitative and qualitative disclosures will be required by lessees and lessors to meet the objective of enabling users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. The intention is to require enough information to supplement the amounts recorded in the financial statements so that users can understand more about the nature of an entity’s leasing activities. ASU No. 2016-02 is effective for interim and annual reporting periods beginning after December 15, 2018. All entities are required to use a modified retrospective approach for leases that exist or are entered into after the beginning of the earliest comparative period in the financial statements. As the Company elected the transition option provided in ASU No. 2018-11 (see below), the modified retrospective approach was applied on January 1, 2019 (as opposed to January 1, 2017). The Company also elected certain relief options offered in ASU 2016-02 including the package of practical expedients, the option not to separate lease and non-lease components and instead to account for them as a single lease component, and the option not to recognize right-of-use assets and lease liabilities that arise from short-term leases (i.e., leases with terms of twelve months or less). The Company did not elect the hindsight practical expedient, which allows entities to use hindsight when determining lease term and impairment of right-of-use assets. The Company has several lease agreements, such as branch locations, which are considered operating leases, and therefore, were not previously recognized on the Company’s consolidated statements of condition. The new guidance requires these lease agreements to be recognized on the consolidated statements of condition as a right-of-use asset and a corresponding lease liability. The new guidance did not have a material impact on the consolidated statements of income or the consolidated statements of cash flows. See Note 16 Leases for more information. In August 2017, the FASB issued ASU No. 2017-12, “Targeted Improvements to Accounting for Hedging Activities.” This ASU’s objectives are to (1) improve the transparency and understandability of information conveyed to financial statement users about an entity’s risk management activities by better aligning the entity’s financial reporting for hedging relationships with those risk management activities; and (2) reduce the complexity of and simplify the application of hedge accounting by preparers. ASU No. 2017-12 is effective for interim and annual reporting periods beginning after December 15, 2018. The Company currently does not designate any derivative financial instruments as formal hedging relationships, and therefore, does not currently utilize hedge accounting. As such, ASU No. 2017-12 did not impact the Company’s Consolidated Financial Statements. In July 2018, the FASB issued ASU No. 2018-11, “Leases - Targeted Improvements” to provide entities with relief from the costs of implementing certain aspects of the new leasing standard, ASU No. 2016-02. Specifically, under the amendments in ASU 2018-11: (1) entities may elect not to recast the comparative periods presented when transitioning to the new leasing standard, and (2) lessors may elect not to separate lease and non-lease components when certain conditions are met. The amendments have the same effective date as ASU 2016-02 (January 1, 2019 for the Company). The Company adopted ASU 2018-11 on its required effective date of January 1, 2019 and elected both transition options mentioned above. ASU 2018-11 did not have a material impact on the Company’s Consolidated Financial Statements. In December 2018, the FASB issued ASU No. 2018-20, “Narrow-Scope Improvements for Lessors.” This ASU (1) allows lessors to make an accounting policy election of presenting sales taxes and other similar taxes collected from lessees on a net basis, (2) requires a lessor to exclude lessor costs paid directly by a lessee to third parties on the lessor’s behalf and include lessor costs that are paid by the lessor and reimbursed by the lessee in the measurement of variable lease revenue and the associated expense, and (3) clarifies that when lessors allocate variable payments to lease and non-lease components they are required to follow the recognition guidance in the new leases standard for the lease component and other applicable guidance, such as the new revenue standard, for the non-lease component. The Company adopted ASU 2018-20 on its required effective date of January 1, 2019 and elected to present sales taxes and other similar taxes collected from lessees on a net basis as described in (1) above. ASU 2018-20 did not have a material impact on the Company’s Consolidated Financial Statements. In March 2019, the FASB issued ASU No. 2019-01, “Leases: Codification Improvements.” This ASU (1) states that for lessors that are not manufacturers or dealers, the fair value of the underlying asset is its cost, less any volume or trade discounts, as long as there is not a significant amount of time between acquisition of the asset and lease commencement; (2) clarifies that lessors in the scope of ASC 942 (such as the Company) must classify principal payments received from sales-type and direct financing leases in investing activities in the statement of cash flows; and (3) clarifies the transition guidance related to certain interim disclosures provided in the year of adoption. To coincide with the adoption of ASU No. 2016-02, the Company elected to early adopt ASU 2019-01 on January 1, 2019. The adoption of this ASU did not have a material impact on the Company’s Consolidated Financial Statements. In April 2019, the FASB issued ASU No. 2019-04, “Codification Improvements to Topic 326, Financial Instruments - Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments.” With respect to Topic 815, Derivatives and Hedging, ASU 2019-04 clarifies that the reclassification of a debt security from held-to-maturity (“HTM”) to available-for-sale (“AFS”) under the transition guidance in ASU 2017-12 would not (1) call into question the classification of other HTM securities, (2) be required to actually designate any reclassified security in a last-of-layer hedge, or (3) be restricted from selling any reclassified security. As part of the transition of ASU 2019-04, entities may reclassify securities that would qualify for designation as the hedged item in a last-of-layer hedging relationship from HTM to AFS; however, entities that already made such a reclassification upon their adoption of ASU 2017-12 are precluded from reclassifying additional securities. The Company did not reclassify any securities from HTM to AFS upon adoption of ASU 2017-12. The Company elected to early adopt the amendments to Topic 815 in June 2019. See Note 3 Investment Securities for more information regarding the impact of the transfer of certain HTM debt securities to AFS. The amendments and pending adoption to Topics 326 and 825 are described in the section below. Accounting Standards Pending Adoption In June 2016, the FASB issued ASU No. 2016-13, “Measurement of Credit Losses on Financial Instruments.” This ASU significantly changes how entities will measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. The standard will replace today’s “incurred loss” approach with an “expected loss” approach known as current expected credit loss (“CECL”), which will apply to: (1) financial assets subject to credit losses and measured at amortized cost, and (2) certain off-balance sheet credit exposures. This includes, but is not limited to, loans, leases, held-to-maturity securities, loan commitments, and financial guarantees. The CECL approach will not apply to AFS debt securities. For AFS debt securities with unrealized losses, entities will measure credit losses in a manner similar to what they do today, except that the credit losses will be recognized as allowances rather than reductions in the amortized cost of the securities. As a result, entities will recognize improvements to estimated credit losses immediately in earnings rather than as interest income over time, as they do today. The ASU also simplifies the accounting model for purchased credit-impaired debt securities and loans. ASU 2016-13 also expands the disclosure requirements regarding an entity’s assumptions, models, and methods for estimating the reserve for credit losses. In addition, entities will need to disclose the amortized cost balance for each class of financial asset by credit quality indicator, disaggregated by the year of origination. ASU No. 2016-13 is effective for interim and annual reporting periods beginning after December 15, 2019 and the Company is planning to adopt the standard in the first quarter of 2020. Entities will apply the standard’s provisions as a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective (i.e., modified retrospective approach). The Company is continuing its implementation efforts through its Company-wide implementation team. This team has assigned roles and responsibilities, key tasks to complete, and a general timeline to be followed. The team meets periodically to discuss the latest developments and ensure progress is being made. The team has been working with an advisory consultant and has finalized and documented the methodologies that will be utilized. The team is currently finalizing controls, processes, policies and disclosures in preparation for performing a full end-to-end parallel run. This parallel run will be completed during the fourth quarter of 2019 for the period ended September 30, 2019. The Company’s preliminary evaluation indicates the provisions of ASU No. 2016-13 are expected to impact the Company’s Consolidated Financial Statements, in particular the level of the reserve for credit losses. The Company is continuing to evaluate the extent of the potential impact and expects that portfolio composition and economic conditions at the time of adoption will be a factor. In August 2018, the FASB issued ASU No. 2018-13, “Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement.” This ASU eliminates, adds and modifies certain disclosure requirements for fair value measurements. Among the changes, entities will no longer be required to disclose the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, but will be required to disclose the range and weighted average used to develop significant unobservable inputs for Level 3 fair value measurements. ASU No. 2018-13 is effective for interim and annual reporting periods beginning after December 15, 2019; early adoption is permitted. As ASU No. 2018-13 only revises disclosure requirements, it will not have a material impact on the Company’s Consolidated Financial Statements. As mentioned in the previous section the FASB issued ASU No. 2019-04 in April 2019. With respect to Topic 326, Financial Instruments - Credit Losses, ASU 2019-04 clarifies the scope of the credit losses standard and addresses issues related to accrued interest receivable balances, recoveries, variable interest rates and prepayments, among other things. With respect to Topic 825, Financial Instruments, on recognizing and measuring financial instruments, ASU 2019-04 addresses the scope of the guidance, the requirement for remeasurement under ASC 820 when using the measurement alternative, certain disclosure requirements and which equity securities have to be remeasured at historical exchange rates. The amendments to Topic 326 have the same effective dates as ASU 2016-13 (i.e., the first quarter of 2020). The Company is currently evaluating the potential impact of Topic 326 amendments on the Company’s Consolidated Financial Statements. The amendments to Topic 825 are effective for interim and annual reporting periods beginning after December 15, 2019 and are not expected to have a material impact on the Company’s Consolidated Financial Statements. In May 2019, the FASB issued ASU No. 2019-05, “Financial Instruments - Credit Losses (Topic 326); Targeted Transition Relief.” This ASU allows entities to irrevocably elect, upon adoption of ASU 2016-13, the fair value option on financial instruments that (1) were previously recorded at amortized cost and (2) are within the scope of ASC 326-20 if the instruments are eligible for the fair value option under ASC 825-10. The fair value option election does not apply to held-to-maturity debt securities. Entities are required to make this election on an instrument-by-instrument basis. ASU 2019-05 has the same effective date as ASU 2016-13 (i.e., the first quarter of 2020). The Company does not expect to elect the fair value option, and therefore, ASU 2019-05 is not expected to impact the Company’s Consolidated Financial Statements.

Cash and Cash Equivalents (Tabl

Cash and Cash Equivalents (Tables)	9 Months Ended
	Sep. 30, 2019
Cash and Cash Equivalents [Abstract]
Schedule of Cash and Cash Equivalents	The following table provides a reconciliation of cash and cash equivalents reported within the consolidated statements of condition that sum to the total of the same such amounts shown in the consolidated statements of cash flows: (dollars in thousands) September 30, December 31, Interest-Bearing Deposits in Other Banks $ 2,946 $ 3,028 Funds Sold 108,446 198,860 Cash and Due From Banks 259,492 324,081 Total Cash and Cash Equivalents $ 370,884 $ 525,969

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2019
Investments, Debt and Equity Securities [Abstract]
Schedule of amortized cost, gross unrealized gains and losses, and fair value of investment securities	The amortized cost, gross unrealized gains and losses, and fair value of the Company’s investment securities as of September 30, 2019 and December 31, 2018 were as follows: (dollars in thousands) Amortized Cost Gross Gross Fair Value September 30, 2019 Available-for-Sale: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 236,794 $ 283 $ (1,392 ) $ 235,685 Debt Securities Issued by States and Political Subdivisions 53,211 772 (1 ) 53,982 Debt Securities Issued by U.S. Government-Sponsored Enterprises 21,969 18 (92 ) 21,895 Debt Securities Issued by Corporations 348,006 1,550 (1,115 ) 348,441 Mortgage-Backed Securities: Residential - Government Agencies 1,215,859 15,731 (2,953 ) 1,228,637 Residential - U.S. Government-Sponsored Enterprises 532,885 5,769 (1,318 ) 537,336 Commercial - Government Agencies 166,306 3,689 (1,577 ) 168,418 Total Mortgage-Backed Securities 1,915,050 25,189 (5,848 ) 1,934,391 Total $ 2,575,030 $ 27,812 $ (8,448 ) $ 2,594,394 Held-to-Maturity: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 354,073 $ 1,502 $ (133 ) $ 355,442 Debt Securities Issued by States and Political Subdivisions 65,109 1,254 — 66,363 Debt Securities Issued by Corporations 15,703 — (143 ) 15,560 Mortgage-Backed Securities: Residential - Government Agencies 1,144,257 16,945 (5,137 ) 1,156,065 Residential - U.S. Government-Sponsored Enterprises 1,282,944 13,456 (2,105 ) 1,294,295 Commercial - Government Agencies 84,824 474 (750 ) 84,548 Total Mortgage-Backed Securities 2,512,025 30,875 (7,992 ) 2,534,908 Total $ 2,946,910 $ 33,631 $ (8,268 ) $ 2,972,273 December 31, 2018 Available-for-Sale: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 394,485 $ 493 $ (2,577 ) $ 392,401 Debt Securities Issued by States and Political Subdivisions 559,800 5,227 (1,031 ) 563,996 Debt Securities Issued by U.S. Government-Sponsored Enterprises 56 — — 56 Debt Securities Issued by Corporations 224,997 — (1,857 ) 223,140 Mortgage-Backed Securities: Residential - Government Agencies 189,645 1,726 (929 ) 190,442 Residential - U.S. Government-Sponsored Enterprises 589,311 1,779 (12,563 ) 578,527 Commercial - Government Agencies 63,864 — (4,484 ) 59,380 Total Mortgage-Backed Securities 842,820 3,505 (17,976 ) 828,349 Total $ 2,022,158 $ 9,225 $ (23,441 ) $ 2,007,942 Held-to-Maturity: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 353,122 $ 186 $ (1,093 ) $ 352,215 Debt Securities Issued by States and Political Subdivisions 234,602 6,150 — 240,752 Debt Securities Issued by Corporations 97,266 — (1,755 ) 95,511 Mortgage-Backed Securities: Residential - Government Agencies 1,861,874 3,886 (51,773 ) 1,813,987 Residential - U.S. Government-Sponsored Enterprises 758,835 1,590 (20,259 ) 740,166 Commercial - Government Agencies 176,393 147 (5,177 ) 171,363 Total Mortgage-Backed Securities 2,797,102 5,623 (77,209 ) 2,725,516 Total $ 3,482,092 $ 11,959 $ (80,057 ) $ 3,413,994
Analysis of the contractual maturities of investment securities	The table below presents an analysis of the contractual maturities of the Company’s investment securities as of September 30, 2019 . Debt securities issued by government agencies (Small Business Administration securities) and mortgage-backed securities are disclosed separately in the table below as these investment securities may prepay prior to their scheduled contractual maturity dates. (dollars in thousands) Amortized Cost Fair Value Available-for-Sale: Due in One Year or Less $ 169,544 $ 169,762 Due After One Year Through Five Years 120,351 120,126 Due After Five Years Through Ten Years 134,235 135,383 Due After Ten Years 51 52 424,181 425,323 Debt Securities Issued by Government Agencies 235,799 234,680 Mortgage-Backed Securities: Residential - Government Agencies 1,215,859 1,228,637 Residential - U.S. Government-Sponsored Enterprises 532,885 537,336 Commercial - Government Agencies 166,306 168,418 Total Mortgage-Backed Securities 1,915,050 1,934,391 Total $ 2,575,030 $ 2,594,394 Held-to-Maturity: Due in One Year or Less $ 304,243 $ 305,141 Due After One Year Through Five Years 119,592 121,302 Due After Five Years Through Ten Years 11,050 10,922 434,885 437,365 Mortgage-Backed Securities: Residential - Government Agencies 1,144,257 1,156,065 Residential - U.S. Government-Sponsored Enterprises 1,282,944 1,294,295 Commercial - Government Agencies 84,824 84,548 Total Mortgage-Backed Securities 2,512,025 2,534,908 Total $ 2,946,910 $ 2,972,273
Schedule of gains (losses) on sale of investment securities	The table below presents the gains and losses from the sales of investment securities for the three and nine months ended September 30, 2019 and 2018 . Three Months Ended Nine Months Ended (dollars in thousands) 2019 2018 2019 2018 Gross Gains on Sales of Investment Securities $ 38 $ — $ 7,701 $ — Gross Losses on Sales of Investment Securities (1,507 ) (729 ) (10,781 ) (3,097 ) Net Gains (Losses) on Sales of Investment Securities $ (1,469 ) $ (729 ) $ (3,080 ) $ (3,097 )
Schedule of investment securities in an unrealized loss position	The Company’s gross unrealized losses and the related fair value of investment securities, aggregated by investment category and length of time in a continuous unrealized loss position, were as follows: Less Than 12 Months 12 Months or Longer Total (dollars in thousands) Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses September 30, 2019 Available-for-Sale: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 64,180 $ (115 ) $ 107,800 $ (1,277 ) $ 171,980 $ (1,392 ) Debt Securities Issued by States and Political Subdivisions 181 — 468 (1 ) 649 (1 ) Debt Securities Issued by U.S. Government-Sponsored Enterprises 21,233 (92 ) — — 21,233 (92 ) Debt Securities Issued by Corporations 25,808 (581 ) 114,466 (534 ) 140,274 (1,115 ) Mortgage-Backed Securities: Residential - Government Agencies 62,749 (173 ) 182,660 (2,780 ) 245,409 (2,953 ) Residential - U.S. Government-Sponsored Enterprises 60,586 (408 ) 82,390 (910 ) 142,976 (1,318 ) Commercial - Government Agencies — — 54,118 (1,577 ) 54,118 (1,577 ) Total Mortgage-Backed Securities 123,335 (581 ) 319,168 (5,267 ) 442,503 (5,848 ) Total $ 234,737 $ (1,369 ) $ 541,902 $ (7,079 ) $ 776,639 $ (8,448 ) Held-to-Maturity: Debt Securities Issued by the U.S. Treasury and Government Agencies $ — $ — $ 39,912 $ (133 ) $ 39,912 $ (133 ) Debt Securities Issued by Corporations 4,638 (15 ) 10,922 (128 ) 15,560 (143 ) Mortgage-Backed Securities: Residential - Government Agencies 76,076 (278 ) 277,116 (4,859 ) 353,192 (5,137 ) Residential - U.S. Government-Sponsored Enterprises 160,448 (312 ) 165,075 (1,793 ) 325,523 (2,105 ) Commercial - Government Agencies — — 53,014 (750 ) 53,014 (750 ) Total Mortgage-Backed Securities 236,524 (590 ) 495,205 (7,402 ) 731,729 (7,992 ) Total $ 241,162 $ (605 ) $ 546,039 $ (7,663 ) $ 787,201 $ (8,268 ) December 31, 2018 Available-for-Sale: Debt Securities Issued by the U.S. Treasury and Government Agencies $ 157,058 $ (964 ) $ 173,763 $ (1,613 ) $ 330,821 $ (2,577 ) Debt Securities Issued by States and Political Subdivisions 38,138 (59 ) 156,772 (972 ) 194,910 (1,031 ) Debt Securities Issued by Corporations 59,770 (231 ) 163,371 (1,626 ) 223,141 (1,857 ) Mortgage-Backed Securities: Residential - Government Agencies 6,299 (10 ) 19,011 (919 ) 25,310 (929 ) Residential - U.S. Government-Sponsored Enterprises — — 473,380 (12,563 ) 473,380 (12,563 ) Commercial - Government Agencies — — 59,380 (4,484 ) 59,380 (4,484 ) Total Mortgage-Backed Securities 6,299 (10 ) 551,771 (17,966 ) 558,070 (17,976 ) Total $ 261,265 $ (1,264 ) $ 1,045,677 $ (22,177 ) $ 1,306,942 $ (23,441 ) Held-to-Maturity: Debt Securities Issued by the U.S. Treasury $ 99,440 $ (237 ) $ 134,239 $ (856 ) $ 233,679 $ (1,093 ) Debt Securities Issued by Corporations — — 95,511 (1,755 ) 95,511 (1,755 ) Mortgage-Backed Securities: Residential - Government Agencies 12,974 (45 ) 1,491,747 (51,728 ) 1,504,721 (51,773 ) Residential - U.S. Government-Sponsored Enterprises — — 617,000 (20,259 ) 617,000 (20,259 ) Commercial - Government Agencies 19,217 (61 ) 145,715 (5,116 ) 164,932 (5,177 ) Total Mortgage-Backed Securities 32,191 (106 ) 2,254,462 (77,103 ) 2,286,653 (77,209 ) Total $ 131,631 $ (343 ) $ 2,484,212 $ (79,714 ) $ 2,615,843 $ (80,057 )
Schedule of interest income from taxable and non-taxable investment securities	Interest income from taxable and non-taxable investment securities for the three and nine months ended September 30, 2019 and 2018 were as follows: Three Months Ended Nine Months Ended (dollars in thousands) 2019 2018 2019 2018 Taxable $ 35,584 $ 28,855 $ 102,912 $ 85,931 Non-Taxable 724 4,554 5,970 14,006 Total Interest Income from Investment Securities $ 36,308 $ 33,409 $ 108,882 $ 99,937
Schedule of carrying value of company's Federal Home Loan Bank and Federal Reserve Bank	As of September 30, 2019 and December 31, 2018 , the carrying value of the Company’s Federal Home Loan Bank of Des Moines stock and Federal Reserve Bank stock was as follows: (dollars in thousands) September 30, December 31, Federal Home Loan Bank Stock $ 14,000 $ 15,000 Federal Reserve Bank Stock 21,093 20,858 Total $ 35,093 $ 35,858

Loans and Leases and the Allo_2

Loans and Leases and the Allowance for Loan and Lease Losses (Tables)	9 Months Ended
	Sep. 30, 2019
Loans and Leases and Allowance for Loan and Lease Losses [Abstract]
Schedule of Loan and Lease Portfolio	The Company’s loan and lease portfolio was comprised of the following as of September 30, 2019 and December 31, 2018 : (dollars in thousands) September 30, December 31, Commercial Commercial and Industrial $ 1,361,011 $ 1,331,149 Commercial Mortgage 2,477,296 2,302,356 Construction 154,754 170,061 Lease Financing 163,672 176,226 Total Commercial 4,156,733 3,979,792 Consumer Residential Mortgage 3,846,511 3,673,796 Home Equity 1,681,951 1,681,442 Automobile 713,424 658,133 Other 1 482,679 455,611 Total Consumer 6,724,565 6,468,982 Total Loans and Leases $ 10,881,298 $ 10,448,774 1 Comprised of other revolving credit, installment, and lease financing.
Schedule of Portfolio Segment and Balance in Allowance Disaggregated on the Basis of Impairment Measurement Method	The following presents by portfolio segment, the activity in the Allowance for the three and nine months ended September 30, 2019 and 2018 . The following also presents by portfolio segment, the balance in the Allowance disaggregated on the basis of the Company’s impairment measurement method and the related recorded investment in loans and leases as of September 30, 2019 and 2018 . (dollars in thousands) Commercial Consumer Total Three Months Ended September 30, 2019 Allowance for Loan and Lease Losses: Balance at Beginning of Period $ 69,268 $ 38,404 $ 107,672 Loans and Leases Charged-Off (239 ) (5,516 ) (5,755 ) Recoveries on Loans and Leases Previously Charged-Off 318 2,451 2,769 Net Loans and Leases Recovered (Charged-Off) 79 (3,065 ) (2,986 ) Provision for Credit Losses 1,023 3,227 4,250 Balance at End of Period $ 70,370 $ 38,566 $ 108,936 Nine Months Ended September 30, 2019 Allowance for Loan and Lease Losses: Balance at Beginning of Period $ 66,874 $ 39,819 $ 106,693 Loans and Leases Charged-Off (2,431 ) (15,281 ) (17,712 ) Recoveries on Loans and Leases Previously Charged-Off 1,220 7,485 8,705 Net Loans and Leases Recovered (Charged-Off) (1,211 ) (7,796 ) (9,007 ) Provision for Credit Losses 4,707 6,543 11,250 Balance at End of Period $ 70,370 $ 38,566 $ 108,936 As of September 30, 2019 Allowance for Loan and Lease Losses: Individually Evaluated for Impairment $ 115 $ 3,266 $ 3,381 Collectively Evaluated for Impairment 70,255 35,300 105,555 Total $ 70,370 $ 38,566 $ 108,936 Recorded Investment in Loans and Leases: Individually Evaluated for Impairment $ 19,324 $ 40,665 $ 59,989 Collectively Evaluated for Impairment 4,137,409 6,683,900 10,821,309 Total $ 4,156,733 $ 6,724,565 $ 10,881,298 Three Months Ended September 30, 2018 Allowance for Loan and Lease Losses: Balance at Beginning of Period $ 63,712 $ 44,476 $ 108,188 Loans and Leases Charged-Off (449 ) (5,578 ) (6,027 ) Recoveries on Loans and Leases Previously Charged-Off 542 2,187 2,729 Net Loans and Leases Recovered (Charged-Off) 93 (3,391 ) (3,298 ) Provision for Credit Losses 1,274 2,526 3,800 Balance at End of Period $ 65,079 $ 43,611 $ 108,690 Nine Months Ended September 30, 2018 Allowance for Loan and Lease Losses: Balance at Beginning of Period $ 65,822 $ 41,524 $ 107,346 Loans and Leases Charged-Off (1,140 ) (16,536 ) (17,676 ) Recoveries on Loans and Leases Previously Charged-Off 1,236 6,359 7,595 Net Loans and Leases Recovered (Charged-Off) 96 (10,177 ) (10,081 ) Provision for Credit Losses (839 ) 12,264 11,425 Balance at End of Period $ 65,079 $ 43,611 $ 108,690 As of September 30, 2018 Allowance for Loan and Lease Losses: Individually Evaluated for Impairment $ 135 $ 3,810 $ 3,945 Collectively Evaluated for Impairment 64,944 39,801 104,745 Total $ 65,079 $ 43,611 $ 108,690 Recorded Investment in Loans and Leases: Individually Evaluated for Impairment $ 12,190 $ 42,218 $ 54,408 Collectively Evaluated for Impairment 3,888,118 6,288,536 10,176,654 Total $ 3,900,308 $ 6,330,754 $ 10,231,062
Schedule of Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator	The following presents by class and by credit quality indicator, the recorded investment in the Company’s loans and leases as of September 30, 2019 and December 31, 2018 . September 30, 2019 (dollars in thousands) Commercial and Industrial Commercial Mortgage Construction Lease Financing Total Commercial Pass $ 1,305,019 $ 2,413,316 $ 149,757 $ 161,947 $ 4,030,039 Special Mention 19,394 37,454 3,778 — 60,626 Classified 36,598 26,526 1,219 1,725 66,068 Total $ 1,361,011 $ 2,477,296 $ 154,754 $ 163,672 $ 4,156,733 (dollars in thousands) Residential Mortgage Home Equity Automobile Other 1 Total Consumer Pass $ 3,841,820 $ 1,678,930 $ 712,842 $ 481,604 $ 6,715,196 Classified 4,691 3,021 582 1,075 9,369 Total $ 3,846,511 $ 1,681,951 $ 713,424 $ 482,679 $ 6,724,565 Total Recorded Investment in Loans and Leases $ 10,881,298 December 31, 2018 (dollars in thousands) Commercial and Industrial Commercial Mortgage Construction Lease Financing Total Commercial Pass $ 1,302,278 $ 2,256,128 $ 168,740 $ 175,223 $ 3,902,369 Special Mention 17,688 30,468 — 5 48,161 Classified 11,183 15,760 1,321 998 29,262 Total $ 1,331,149 $ 2,302,356 $ 170,061 $ 176,226 $ 3,979,792 (dollars in thousands) Residential Mortgage Home Equity Automobile Other 1 Total Consumer Pass $ 3,668,475 $ 1,677,193 $ 657,620 $ 454,697 $ 6,457,985 Classified 5,321 4,249 513 914 10,997 Total $ 3,673,796 $ 1,681,442 $ 658,133 $ 455,611 $ 6,468,982 Total Recorded Investment in Loans and Leases $ 10,448,774 1 Comprised of other revolving credit, installment, and lease financing.
Schedule of Aging Analysis by Class of Loan and Lease Portfolio	The following presents by class, an aging analysis of the Company’s loan and lease portfolio as of September 30, 2019 and December 31, 2018 . (dollars in thousands) 30 - 59 Days Past Due 60 - 89 Days Past Due Past Due 90 Days or More Non-Accrual Total Past Due and Non-Accrual Current Total Loans and Leases Non-Accrual Loans and Leases that are Current 2 As of September 30, 2019 Commercial Commercial and Industrial $ 826 $ 131 $ 81 $ 573 $ 1,611 $ 1,359,400 $ 1,361,011 $ 448 Commercial Mortgage 750 — — 11,088 11,838 2,465,458 2,477,296 11,088 Construction — — — — — 154,754 154,754 — Lease Financing — — — — — 163,672 163,672 — Total Commercial 1,576 131 81 11,661 13,449 4,143,284 4,156,733 11,536 Consumer Residential Mortgage 3,666 979 2,032 4,258 10,935 3,835,576 3,846,511 782 Home Equity 2,446 2,159 2,320 2,787 9,712 1,672,239 1,681,951 942 Automobile 13,809 1,681 582 — 16,072 697,352 713,424 — Other 1 2,507 1,812 1,076 — 5,395 477,284 482,679 — Total Consumer 22,428 6,631 6,010 7,045 42,114 6,682,451 6,724,565 1,724 Total $ 24,004 $ 6,762 $ 6,091 $ 18,706 $ 55,563 $ 10,825,735 $ 10,881,298 $ 13,260 As of December 31, 2018 Commercial Commercial and Industrial $ 3,653 $ 118 $ 10 $ 542 $ 4,323 $ 1,326,826 $ 1,331,149 $ 515 Commercial Mortgage 561 — — 2,040 2,601 2,299,755 2,302,356 2,040 Construction — — — — — 170,061 170,061 — Lease Financing — — — — — 176,226 176,226 — Total Commercial 4,214 118 10 2,582 6,924 3,972,868 3,979,792 2,555 Consumer Residential Mortgage 5,319 638 2,446 5,321 13,724 3,660,072 3,673,796 1,203 Home Equity 3,323 1,581 2,684 3,671 11,259 1,670,183 1,681,442 765 Automobile 12,372 2,240 513 — 15,125 643,008 658,133 — Other 1 2,913 1,245 914 — 5,072 450,539 455,611 — Total Consumer 23,927 5,704 6,557 8,992 45,180 6,423,802 6,468,982 1,968 Total $ 28,141 $ 5,822 $ 6,567 $ 11,574 $ 52,104 $ 10,396,670 $ 10,448,774 $ 4,523 1 Comprised of other revolving credit, installment, and lease financing. 2 Represents non-accrual loans that are not past due 30 days or more; however, full payment of principal and interest is still not expected.
Schedule of Information Related to Impaired Loans	The following presents by class, information related to impaired loans as of September 30, 2019 and December 31, 2018 . (dollars in thousands) Recorded Investment Unpaid Principal Balance Related Allowance for Loan Losses September 30, 2019 Impaired Loans with No Related Allowance Recorded: Commercial Commercial and Industrial $ 4,439 $ 4,439 $ — Commercial Mortgage 10,997 16,114 — Construction 1,219 1,219 — Total Commercial 16,655 21,772 — Total Impaired Loans with No Related Allowance Recorded $ 16,655 $ 21,772 $ — Impaired Loans with an Allowance Recorded: Commercial Commercial and Industrial $ 942 $ 1,225 $ 84 Commercial Mortgage 1,727 1,727 31 Total Commercial 2,669 2,952 115 Consumer Residential Mortgage 18,129 21,721 2,632 Home Equity 3,228 3,228 346 Automobile 17,621 17,621 244 Other 1 1,687 1,687 44 Total Consumer 40,665 44,257 3,266 Total Impaired Loans with an Allowance Recorded $ 43,334 $ 47,209 $ 3,381 Impaired Loans: Commercial $ 19,324 $ 24,724 $ 115 Consumer 40,665 44,257 3,266 Total Impaired Loans $ 59,989 $ 68,981 $ 3,381 December 31, 2018 Impaired Loans with No Related Allowance Recorded: Commercial Commercial and Industrial $ 4,587 $ 4,587 $ — Commercial Mortgage 2,712 6,212 — Construction 1,321 1,321 — Total Commercial 8,620 12,120 — Total Impaired Loans with No Related Allowance Recorded $ 8,620 $ 12,120 $ — Impaired Loans with an Allowance Recorded: Commercial Commercial and Industrial $ 1,856 $ 2,099 $ 130 Commercial Mortgage 1,822 1,822 92 Total Commercial 3,678 3,921 222 Consumer Residential Mortgage 19,753 23,635 3,051 Home Equity 3,359 3,359 350 Automobile 17,117 17,117 296 Other 1 2,098 2,098 57 Total Consumer 42,327 46,209 3,754 Total Impaired Loans with an Allowance Recorded $ 46,005 $ 50,130 $ 3,976 Impaired Loans: Commercial $ 12,298 $ 16,041 $ 222 Consumer 42,327 46,209 3,754 Total Impaired Loans $ 54,625 $ 62,250 $ 3,976 1 Comprised of other revolving credit and installment financing.
Schedule of the Average Recorded Investment and Interest Income Recognized on Impaired Loans	The following presents by class, information related to the average recorded investment and interest income recognized on impaired loans for the three and nine months ended September 30, 2019 and 2018 . Three Months Ended Three Months Ended (dollars in thousands) Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized Impaired Loans with No Related Allowance Recorded: Commercial Commercial and Industrial $ 4,642 $ 70 $ 5,900 $ 48 Commercial Mortgage 8,359 15 3,179 15 Construction 1,243 20 1,361 2 Total Commercial 14,244 105 10,440 65 Total Impaired Loans with No Related Allowance Recorded $ 14,244 $ 105 $ 10,440 $ 65 Impaired Loans with an Allowance Recorded: Commercial Commercial and Industrial $ 1,312 $ 7 $ 1,537 $ 55 Commercial Mortgage 4,502 2 211 17 Total Commercial 5,814 9 1,748 72 Consumer Residential Mortgage 18,587 190 20,571 456 Home Equity 3,362 40 2,695 35 Automobile 17,624 297 16,008 293 Other 1 1,746 37 2,826 62 Total Consumer 41,319 564 42,100 846 Total Impaired Loans with an Allowance Recorded $ 47,133 $ 573 $ 43,848 $ 918 Impaired Loans: Commercial $ 20,058 $ 114 $ 12,188 $ 137 Consumer 41,319 564 42,100 846 Total Impaired Loans $ 61,377 $ 678 $ 54,288 $ 983 Nine Months Ended Nine Months Ended (dollars in thousands) Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized Impaired Loans with No Related Allowance Recorded: Commercial Commercial and Industrial $ 4,760 $ 233 $ 6,927 $ 244 Commercial Mortgage 6,322 47 5,285 132 Construction 1,275 62 1,373 47 Total Commercial 12,357 342 13,585 423 Total Impaired Loans with No Related Allowance Recorded $ 12,357 $ 342 $ 13,585 $ 423 Impaired Loans with an Allowance Recorded: Commercial Commercial and Industrial $ 1,499 $ 50 $ 1,347 $ 75 Commercial Mortgage 3,155 6 223 23 Total Commercial 4,654 56 1,570 98 Consumer Residential Mortgage 19,060 585 20,514 883 Home Equity 3,341 120 2,448 86 Automobile 17,537 890 15,881 832 Other 1 1,895 118 2,800 170 Total Consumer 41,833 1,713 41,643 1,971 Total Impaired Loans with an Allowance Recorded $ 46,487 $ 1,769 $ 43,213 $ 2,069 Impaired Loans: Commercial $ 17,011 $ 398 $ 15,155 $ 521 Consumer 41,833 1,713 41,643 1,971 Total Impaired Loans $ 58,844 $ 2,111 $ 56,798 $ 2,492 1 Comprised of other revolving credit and installment financing.
Schedule of Loans Modified in a TDR and TDRs that Defaulted During the Period Within 12 mos of Modification Date	The following presents by class, information related to loans modified in a TDR during the three and nine months ended September 30, 2019 and 2018 . Loans Modified as a TDR for the Loans Modified as a TDR for the Recorded Increase in Recorded Increase in Troubled Debt Restructurings Number of Investment Allowance Number of Investment Allowance (dollars in thousands) Contracts (as of period end) 1 (as of period end) Contracts (as of period end) 1 (as of period end) Commercial Commercial and Industrial 1 $ 45 $ — 1 $ 233 $ — Total Commercial 1 45 — 1 233 — Consumer Residential Mortgage — — — 2 296 5 Home Equity — — — 2 434 69 Automobile 86 1,665 23 87 1,700 33 Other 2 14 117 3 49 326 9 Total Consumer 100 1,782 26 140 2,756 116 Total 101 $ 1,827 $ 26 141 $ 2,989 $ 116 Loans Modified as a TDR for the Loans Modified as a TDR for the Recorded Increase in Recorded Increase in Troubled Debt Restructurings Number of Investment Allowance Number of Investment Allowance (dollars in thousands) Contracts (as of period end) 1 (as of period end) Contracts (as of period end) 1 (as of period end) Commercial Commercial and Industrial 5 $ 244 $ 14 8 $ 1,450 $ 47 Commercial Mortgage 1 3,766 — — — — Total Commercial 6 4,010 14 8 1,450 47 Consumer Residential Mortgage 1 57 — 4 749 35 Home Equity 2 246 — 5 971 69 Automobile 271 5,011 69 254 5,196 100 Other 2 75 459 12 173 1,182 34 Total Consumer 349 5,773 81 436 8,098 238 Total 355 $ 9,783 $ 95 444 $ 9,548 $ 285 1 The period end balances reflect all paydowns and charge-offs since the modification date. TDRs fully paid-off, charged-off, or foreclosed upon by period end are not included. 2 Comprised of other revolving credit and installment financing. The following presents by class, all loans modified in a TDR that defaulted during the three and nine months ended September 30, 2019 and 2018 , and within twelve months of their modification date. A TDR is considered to be in default once it becomes 60 days or more past due following a modification. Three Months Ended Three Months Ended TDRs that Defaulted During the Period, Recorded Recorded Within Twelve Months of their Modification Date Number of Investment Number of Investment (dollars in thousands) Contracts (as of period end) 1 Contracts (as of period end) 1 Consumer Residential Mortgage 1 $ 133 — $ — Home Equity 1 195 — — Automobile 9 126 12 266 Other 2 9 72 28 174 Total Consumer 20 526 40 440 Total 20 $ 526 40 $ 440 Nine Months Ended Nine Months Ended TDRs that Defaulted During the Period, Recorded Recorded Within Twelve Months of their Modification Date Number of Investment Number of Investment (dollars in thousands) Contracts (as of period end) 1 Contracts (as of period end) 1 Commercial Commercial and Industrial 1 $ 55 — $ — Total Commercial 1 55 — — Consumer Residential Mortgage 1 133 — — Home Equity 1 195 — — Automobile 22 326 32 614 Other 2 24 144 56 382 Total Consumer 48 798 88 996 Total 49 $ 853 88 $ 996 1 The period end balances reflect all paydowns and charge-offs since the modification date. TDRs fully paid-off, charged-off, or foreclosed upon by period end are not included. 2 Comprised of other revolving credit and installment financing.

Mortgage Servicing Rights (Tabl

Mortgage Servicing Rights (Tables)	9 Months Ended
	Sep. 30, 2019
Transfers and Servicing of Financial Assets [Abstract]
Analysis of mortgage servicing rights accounted for under the fair value measurement method	For the three and nine months ended September 30, 2019 and 2018 , the change in the carrying value of the Company’s mortgage servicing rights accounted for under the fair value measurement method was as follows: Three Months Ended Nine Months Ended (dollars in thousands) 2019 2018 2019 2018 Balance at Beginning of Period $ 1,212 $ 1,366 $ 1,290 $ 1,454 Change in Fair Value: Due to Payoffs (38 ) (39 ) (116 ) (127 ) Total Changes in Fair Value of Mortgage Servicing Rights (38 ) (39 ) (116 ) (127 ) Balance at End of Period $ 1,174 $ 1,327 $ 1,174 $ 1,327
Analysis of mortgage servicing rights accounted for under the amortization method	For the three and nine months ended September 30, 2019 and 2018 , the change in the carrying value of the Company’s mortgage servicing rights accounted for under the amortization method was as follows: Three Months Ended Nine Months Ended (dollars in thousands) 2019 2018 2019 2018 Balance at Beginning of Period $ 23,021 $ 23,217 $ 23,020 $ 23,168 Servicing Rights that Resulted From Asset Transfers 1,263 562 2,788 1,957 Amortization (1,032 ) (643 ) (2,546 ) (1,989 ) Valuation Allowance Provision (18 ) — (28 ) — Balance at End of Period $ 23,234 $ 23,136 $ 23,234 $ 23,136 Valuation Allowance: Balance at Beginning of Period $ (10 ) $ — $ — $ — Valuation Allowance Provision (18 ) — (28 ) — Balance at End of Period $ (28 ) $ — $ (28 ) $ — Fair Value of Mortgage Servicing Rights Accounted for Under the Amortization Method Beginning of Period $ 24,905 $ 29,746 $ 29,218 $ 26,716 End of Period $ 23,674 $ 30,063 $ 23,674 $ 30,063
Schedule of key data and assumptions used in estimating the fair value of mortgage servicing rights	The key data and assumptions used in estimating the fair value of the Company’s mortgage servicing rights as of September 30, 2019 and December 31, 2018 were as follows: September 30, December 31, 2018 Weighted-Average Constant Prepayment Rate 1 11.81 % 7.01 % Weighted-Average Life (in years) 5.79 7.89 Weighted-Average Note Rate 4.03 % 4.06 % Weighted-Average Discount Rate 2 6.96 % 9.59 % 1 Represents annualized loan prepayment rate assumption. 2 Derived from multiple interest rate scenarios that incorporate a spread to a market yield curve and market volatilities.
Schedule of sensitivity analysis of the fair value of mortgage servicing rights	A sensitivity analysis of the Company’s fair value of mortgage servicing rights to changes in certain key assumptions as of September 30, 2019 and December 31, 2018 is presented in the following table. (dollars in thousands) September 30, December 31, Constant Prepayment Rate Decrease in fair value from 25 basis points (“bps”) adverse change $ (268 ) $ (361 ) Decrease in fair value from 50 bps adverse change (529 ) (716 ) Discount Rate Decrease in fair value from 25 bps adverse change (231 ) (325 ) Decrease in fair value from 50 bps adverse change (458 ) (643 )

Low Income Housing Tax Credit_2

Low Income Housing Tax Credit Partnerships (Tables)	9 Months Ended
	Sep. 30, 2019
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments	As of September 30, 2019 , the expected payments for unfunded affordable housing commitments were as follows: (dollars in thousands) Amount 2019 $ 2,923 2020 12,370 2021 44 2022 69 2023 45 Thereafter 1,417 Total Unfunded Commitments $ 16,868 The following table presents tax credits and other tax benefits recognized and amortization expense related to affordable housing for the three and nine months ended September 30, 2019 and 2018 . Three Months Ended Nine Months Ended (dollars in thousands) 2019 2018 2019 2018 Effective Yield Method Tax credits and other tax benefits recognized $ 2,930 $ 3,380 $ 8,789 $ 10,192 Amortization Expense in Provision for Income Taxes 1,891 2,078 5,674 6,233 Proportional Amortization Method Tax credits and other tax benefits recognized $ 753 $ 410 $ 2,260 $ 1,231 Amortization Expense in Provision for Income Taxes 645 333 1,934 999

Balance Sheet Offsetting (Table

Balance Sheet Offsetting (Tables)	9 Months Ended
	Sep. 30, 2019
Offsetting [Abstract]
Schedule of Repurchase Agreements - by maturity date and collateral type	The following table presents the remaining contractual maturities of the Company’s repurchase agreements as of September 30, 2019 and December 31, 2018 , disaggregated by the class of collateral pledged. Remaining Contractual Maturity of Repurchase Agreements (dollars in thousands) Up to 91-365 days 1-3 Years After Total September 30, 2019 Class of Collateral Pledged: Debt Securities Issued by the U.S. Treasury and Government Agencies $ — $ — $ 198,303 $ 116,587 $ 314,890 Debt Securities Issued by States and Political Subdivisions 490 2,300 — — 2,790 Mortgage-Backed Securities: Residential - Government Agencies 1,509 — 26,697 59,524 87,730 Residential - U.S. Government-Sponsored Enterprises — — — 198,889 198,889 Total $ 1,999 $ 2,300 $ 225,000 $ 375,000 $ 604,299 December 31, 2018 Class of Collateral Pledged: Debt Securities Issued by the U.S. Treasury and Government Agencies $ — $ — $ 198,442 $ 117,021 $ 315,463 Debt Securities Issued by States and Political Subdivisions 1,906 1,590 — — 3,496 Mortgage-Backed Securities: Residential - Government Agencies 800 — 26,558 70,341 97,699 Residential - U.S. Government-Sponsored Enterprises — — — 87,638 87,638 Total $ 2,706 $ 1,590 $ 225,000 $ 275,000 $ 504,296
Schedule of assets and liabilities subject to an enforceable master netting arrangement	The following table presents the assets and liabilities subject to an enforceable master netting arrangement, or repurchase agreements, as of September 30, 2019 and December 31, 2018 . The swap agreements the Company has with our commercial banking customers are not subject to an enforceable master netting arrangement, and therefore, are excluded from this table. As previously mentioned, centrally cleared swap agreements between the Company and institutional counterparties are also excluded from this table. (i) (ii) (iii) = (i)-(ii) (iv) (v) = (iii)-(iv) Gross Amounts Recognized in the Statements of Condition Gross Amounts Offset in the Statements of Condition Net Amounts Presented in the Statements of Condition Gross Amounts Not Offset in the Statements of Condition (dollars in thousands) Netting Adjustments per Master Netting Arrangements Fair Value of Collateral Pledged/Received 1 Net Amount September 30, 2019 Assets: Interest Rate Swap Agreements: Institutional Counterparties $ 92 $ — $ 92 $ 92 $ — $ — Liabilities: Interest Rate Swap Agreements: Institutional Counterparties 8,258 — 8,258 92 6,113 2,053 Repurchase Agreements: Private Institutions 600,000 — 600,000 — 600,000 — Government Entities 4,299 — 4,299 — 4,299 — $ 604,299 $ — $ 604,299 $ — $ 604,299 $ — December 31, 2018 Assets: Interest Rate Swap Agreements: Institutional Counterparties $ 7,572 $ — $ 7,572 $ 1,490 $ — $ 6,082 Liabilities: Interest Rate Swap Agreements: Institutional Counterparties 1,490 — 1,490 1,490 — — Repurchase Agreements: Private Institutions 500,000 — 500,000 — 500,000 — Government Entities 4,296 — 4,296 — 4,296 — $ 504,296 $ — $ 504,296 $ — $ 504,296 $ — 1 The application of collateral cannot reduce the net amount below zero. Therefore, excess collateral is not reflected in this table. For repurchase agreements with private institutions, the fair value of investment securities pledged was $644.3 million and $526.7 million as of September 30, 2019 and December 31, 2018 , respectively. For repurchase agreements with government entities, the fair value of investment securities pledged was $5.8 million and $6.8 million as of September 30, 2019 and December 31, 2018 , respectively.

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2019
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Components of other comprehensive income	The following table presents the components of other comprehensive income (loss) for the three and nine months ended September 30, 2019 and 2018 : (dollars in thousands) Before Tax Tax Effect Net of Tax Three Months Ended September 30, 2019 Net Unrealized Gains (Losses) on Investment Securities: Net Unrealized Gains (Losses) Arising During the Period $ 7,314 $ 1,938 $ 5,376 Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) that (Increase) Decrease Net Income: Amortization of Unrealized Holding (Gains) Losses on Held-to-Maturity Securities 1 39 10 29 Net Unrealized Gains (Losses) on Investment Securities 7,353 1,948 5,405 Defined Benefit Plans: Amortization of Net Actuarial Losses (Gains) 406 108 298 Amortization of Prior Service Credit (72 ) (19 ) (53 ) Defined Benefit Plans, Net 334 89 245 Other Comprehensive Income (Loss) $ 7,687 $ 2,037 $ 5,650 Three Months Ended September 30, 2018 Net Unrealized Gains (Losses) on Investment Securities: Net Unrealized Gains (Losses) Arising During the Period $ (8,086 ) $ (2,137 ) $ (5,949 ) Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) that (Increase) Decrease Net Income: Amortization of Unrealized Holding (Gains) Losses on Held-to-Maturity Securities 1 476 126 350 Net Unrealized Gains (Losses) on Investment Securities (7,610 ) (2,011 ) (5,599 ) Defined Benefit Plans: Amortization of Net Actuarial Losses (Gains) 437 115 322 Amortization of Prior Service Credit (142 ) (36 ) (106 ) Defined Benefit Plans, Net 295 79 216 Other Comprehensive Income (Loss) $ (7,315 ) $ (1,932 ) $ (5,383 ) Nine Months Ended September 30, 2019 Net Unrealized Gains (Losses) on Investment Securities: Net Unrealized Gains (Losses) Arising During the Period $ 38,077 $ 10,090 $ 27,987 Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) that (Increase) Decrease Net Income: (Gain) Loss on Sale (63 ) (17 ) (46 ) Amortization of Unrealized Holding (Gains) Losses on Held-to-Maturity Securities 1 804 212 592 Net Unrealized Gains (Losses) on Investment Securities 38,818 10,285 28,533 Defined Benefit Plans: Amortization of Net Actuarial Losses (Gains) 1,218 323 895 Amortization of Prior Service Credit (216 ) (57 ) (159 ) Defined Benefit Plans, Net 1,002 266 736 Other Comprehensive Income (Loss) $ 39,820 $ 10,551 $ 29,269 Nine Months Ended September 30, 2018 Net Unrealized Gains (Losses) on Investment Securities: Net Unrealized Gains (Losses) Arising During the Period $ (25,765 ) $ (6,812 ) $ (18,953 ) Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) that (Increase) Decrease Net Income: Amortization of Unrealized Holding (Gains) Losses on Held-to-Maturity Securities 1 1,712 453 1,259 Net Unrealized Gains (Losses) on Investment Securities (24,053 ) (6,359 ) (17,694 ) Defined Benefit Plans: Amortization of Net Actuarial Losses (Gains) 1,309 346 963 Amortization of Prior Service Credit (426 ) (111 ) (315 ) Defined Benefit Plans, Net 883 235 648 Other Comprehensive Income (Loss) $ (23,170 ) $ (6,124 ) $ (17,046 ) 1 The amount relates to the amortization/accretion of unrealized net gains and losses related to the Company’s reclassification of available-for-sale investment securities to the held-to-maturity category. The unrealized net gains/losses will be amortized/accreted over the remaining life of the investment securities as an adjustment of yield.
Schedule of accumulated other comprehensive income (loss)	The following table presents the changes in each component of accumulated other comprehensive income (loss), net of tax, for the three and nine months ended September 30, 2019 and 2018 : (dollars in thousands) Investment Securities-Available-for-Sale Investment Securities-Held-to-Maturity Defined Benefit Plans Accumulated Other Comprehensive Income (Loss) Three Months Ended September 30, 2019 Balance at Beginning of Period $ 8,859 $ (764 ) $ (35,519 ) $ (27,424 ) Other Comprehensive Income (Loss) Before Reclassifications 5,376 — — 5,376 Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) — 29 245 274 Total Other Comprehensive Income (Loss) 5,376 29 245 5,650 Balance at End of Period $ 14,235 $ (735 ) $ (35,274 ) $ (21,774 ) Three Months Ended September 30, 2018 Balance at Beginning of Period $ (15,331 ) $ (5,272 ) $ (33,252 ) $ (53,855 ) Other Comprehensive Income (Loss) Before Reclassifications (5,949 ) — — (5,949 ) Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) — 350 216 566 Total Other Comprehensive Income (Loss) (5,949 ) 350 216 (5,383 ) Balance at End of Period $ (21,280 ) $ (4,922 ) $ (33,036 ) $ (59,238 ) Nine Months Ended September 30, 2019 Balance at Beginning of Period $ (10,447 ) $ (4,586 ) $ (36,010 ) $ (51,043 ) Other Comprehensive Income (Loss) Before Reclassifications 27,987 — — 27,987 Transfers (3,259 ) 3,259 — — Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) (46 ) 592 736 1,282 Total Other Comprehensive Income (Loss) 24,682 3,851 736 29,269 Balance at End of Period $ 14,235 $ (735 ) $ (35,274 ) $ (21,774 ) Nine Months Ended September 30, 2018 Balance at Beginning of Period $ (1,915 ) $ (5,085 ) $ (27,715 ) $ (34,715 ) Other Comprehensive Income (Loss) Before Reclassifications (18,953 ) — — (18,953 ) Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) — 1,259 648 1,907 Total Other Comprehensive Income (Loss) (18,953 ) 1,259 648 (17,046 ) Reclassification of the Income Tax Effects of the (412 ) (1,096 ) (5,969 ) (7,477 ) Balance at End of Period $ (21,280 ) $ (4,922 ) $ (33,036 ) $ (59,238 )
Reclassification out of accumulated other comprehensive income	The following table presents the amounts reclassified out of each component of accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2019 and 2018 : Details about Accumulated Other Comprehensive Income (Loss) Components Amount Reclassified from Accumulated Other Comprehensive Income (Loss) 1 Affected Line Item in the Statement Where Net Income Is Presented Three Months Ended September 30, (dollars in thousands) 2019 2018 Amortization of Unrealized Holding Gains (Losses) on Investment Securities Held-to-Maturity $ (39 ) $ (476 ) Interest Income 10 126 Provision for Income Tax (29 ) (350 ) Net of Tax Amortization of Defined Benefit Plan Items Prior Service Credit 2 72 142 Net Actuarial Losses 2 (406 ) (437 ) (334 ) (295 ) Total Before Tax 89 79 Provision for Income Tax (245 ) (216 ) Net of Tax Total Reclassifications for the Period $ (274 ) $ (566 ) Net of Tax Details about Accumulated Other Comprehensive Income (Loss) Components Amount Reclassified from Accumulated Other Comprehensive Income (Loss) 1 Affected Line Item in the Statement Where Net Income Is Presented Nine Months Ended September 30, (dollars in thousands) 2019 2018 Amortization of Unrealized Holding Gains (Losses) on Investment Securities Held-to-Maturity $ (804 ) $ (1,712 ) Interest Income 212 453 Provision for Income Tax (592 ) (1,259 ) Net of Tax Sale of Investment Securities Available-for-Sale 63 — Investment Securities Gains (Losses), Net (17 ) — Provision for Income Tax 46 — Net of tax Amortization of Defined Benefit Plan Items Prior Service Credit 2 216 426 Net Actuarial Losses 2 (1,218 ) (1,309 ) (1,002 ) (883 ) Total Before Tax 266 235 Provision for Income Tax (736 ) (648 ) Net of Tax Total Reclassifications for the Period $ (1,282 ) $ (1,907 ) Net of Tax 1 Amounts in parentheses indicate reductions to net income. 2 These accumulated other comprehensive income (loss) components are included in the computation of net periodic benefit cost and are included in Other Noninterest Expense on the consolidated statements of income (see Note 11 Pension Plans and Postretirement Benefit Plan for additional details).

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Reconciliation of the weighted average number of common shares outstanding for computing diluted earnings per share and antidilutive stock options and restricted stock outstanding	The following is a reconciliation of the weighted average number of common shares outstanding for computing diluted earnings per share and antidilutive stock options and restricted stock outstanding for the three and nine months ended September 30, 2019 and 2018 : Three Months Ended Nine Months Ended 2019 2018 2019 2018 Denominator for Basic Earnings Per Share 40,190,508 41,620,776 40,554,036 41,846,080 Dilutive Effect of Equity Based Awards 260,234 278,625 252,259 287,696 Denominator for Diluted Earnings Per Share 40,450,742 41,899,401 40,806,295 42,133,776 Antidilutive Stock Options and Restricted Stock Outstanding — — 2,399 —

Business Segments (Tables)

Business Segments (Tables)	9 Months Ended
	Sep. 30, 2019
Segment Reporting [Abstract]
Selected Business Segment Financial Information	Selected business segment financial information as of and for the three and nine months ended September 30, 2019 and 2018 were as follows: (dollars in thousands) Retail Banking Commercial Banking Investment Services and Private Banking Treasury and Other Consolidated Total Three Months Ended September 30, 2019 Net Interest Income $ 66,648 $ 46,791 $ 9,641 $ 1,816 $ 124,896 Provision for Credit Losses 3,084 (130 ) 32 1,264 4,250 Net Interest Income After Provision for Credit Losses 63,564 46,921 9,609 552 120,646 Noninterest Income 22,964 8,739 13,663 1,141 46,507 Noninterest Expense (59,358 ) (21,330 ) (15,840 ) (3,821 ) (100,349 ) Income Before Provision for Income Taxes 27,170 34,330 7,432 (2,128 ) 66,804 Provision for Income Taxes (6,547 ) (8,560 ) (1,959 ) 2,314 (14,752 ) Net Income $ 20,623 $ 25,770 $ 5,473 $ 186 $ 52,052 Total Assets as of September 30, 2019 $ 6,668,902 $ 4,145,717 $ 324,388 $ 6,533,133 $ 17,672,140 Three Months Ended September 30, 2018 Net Interest Income $ 66,927 $ 46,240 $ 10,574 $ (814 ) $ 122,927 Provision for Credit Losses 3,229 69 — 502 3,800 Net Interest Income After Provision for Credit Losses 63,698 46,171 10,574 (1,316 ) 119,127 Noninterest Income 19,814 6,241 13,526 1,901 41,482 Noninterest Expense (51,806 ) (20,242 ) (15,657 ) (2,833 ) (90,538 ) Income Before Provision for Income Taxes 31,706 32,170 8,443 (2,248 ) 70,071 Provision for Income Taxes (7,943 ) (7,218 ) (2,226 ) 4,249 (13,138 ) Net Income $ 23,763 $ 24,952 $ 6,217 $ 2,001 $ 56,933 Total Assets as of September 30, 2018 $ 6,246,126 $ 3,873,454 $ 340,793 $ 6,531,361 $ 16,991,734 Nine Months Ended September 30, 2019 Net Interest Income $ 200,019 $ 139,784 $ 29,685 $ 4,342 $ 373,830 Provision for Credit Losses 7,852 1,141 14 2,243 11,250 Net Interest Income After Provision for Credit Losses 192,167 138,643 29,671 2,099 362,580 Noninterest Income 65,305 22,738 41,767 5,826 135,636 Noninterest Expense (163,968 ) (63,545 ) (49,200 ) (9,418 ) (286,131 ) Income Before Provision for Income Taxes 93,504 97,836 22,238 (1,493 ) 212,085 Provision for Income Taxes (22,883 ) (22,507 ) (5,862 ) 6,937 (44,315 ) Net Income $ 70,621 $ 75,329 $ 16,376 $ 5,444 $ 167,770 Total Assets as of September 30, 2019 $ 6,668,902 $ 4,145,717 $ 324,388 $ 6,533,133 $ 17,672,140 Nine Months Ended September 30, 2018 Net Interest Income $ 197,007 $ 133,148 $ 30,987 $ 1,237 $ 362,379 Provision for Credit Losses 10,417 (276 ) (60 ) 1,344 11,425 Net Interest Income After Provision for Credit Losses 186,590 133,424 31,047 (107 ) 350,954 Noninterest Income 58,665 17,395 41,941 8,814 126,815 Noninterest Expense (158,344 ) (60,432 ) (48,264 ) (8,673 ) (275,713 ) Income Before Provision for Income Taxes 86,911 90,387 24,724 34 202,056 Provision for Income Taxes (21,707 ) (20,782 ) (6,518 ) 12,642 (36,365 ) Net Income $ 65,204 $ 69,605 $ 18,206 $ 12,676 $ 165,691 Total Assets as of September 30, 2018 $ 6,246,126 $ 3,873,454 $ 340,793 $ 6,531,361 $ 16,991,734

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of the notional amount and fair value of the derivative financial instruments	The notional amount and fair value of the Company’s derivative financial instruments as of September 30, 2019 and December 31, 2018 were as follows: September 30, 2019 December 31, 2018 (dollars in thousands) Notional Amount Fair Value Notional Amount Fair Value Interest Rate Lock Commitments $ 110,702 $ 2,788 $ 33,133 $ 871 Forward Commitments 130,815 201 34,102 (352 ) Interest Rate Swap Agreements Receive Fixed/Pay Variable Swaps 763,316 37,289 505,034 (2,537 ) Pay Fixed/Receive Variable Swaps 763,316 (8,166 ) 505,034 6,082 Foreign Exchange Contracts 72,683 (405 ) 55,663 793 Conversion Rate Swap Agreement 104,816 (453 ) 80,746 —
Derivative financial instruments, their fair values, and balance sheet location	The following table presents the Company’s derivative financial instruments, their fair values, and their location in the consolidated statements of condition as of September 30, 2019 and December 31, 2018 : Derivative Financial Instruments September 30, 2019 December 31, 2018 Not Designated as Hedging Instruments 1 Asset Liability Asset Liability (dollars in thousands) Derivatives Derivatives Derivatives Derivatives Interest Rate Lock Commitments $ 2,788 $ — $ 877 $ 6 Forward Commitments 391 190 4 356 Interest Rate Swap Agreements 37,472 8,349 12,915 9,370 Foreign Exchange Contracts 41 446 808 15 Conversion Rate Swap Agreement — 453 — — Total $ 40,692 $ 9,438 $ 14,604 $ 9,747 1 Asset derivatives are included in other assets and liability derivatives are included in other liabilities in the consolidated statements of condition.
Derivative financial instruments and the amount and location of the net gains or losses recognized in the statements of income	The following table presents the Company’s derivative financial instruments and the amount and location of the net gains or losses recognized in the consolidated statements of income for the three and nine months ended September 30, 2019 and 2018 : Location of Derivative Financial Instruments Net Gains (Losses) Three Months Ended Nine Months Ended Not Designated as Hedging Instruments Recognized in the September 30, September 30, (dollars in thousands) Statements of Income 2019 2018 2019 2018 Interest Rate Lock Commitments Mortgage Banking $ 4,381 $ 729 $ 9,667 $ 2,227 Forward Commitments Mortgage Banking (282 ) 207 (2,257 ) 1,131 Interest Rate Swap Agreements Other Noninterest Income 2,967 558 5,863 1,308 Foreign Exchange Contracts Other Noninterest Income 480 681 2,546 2,640 Conversion Rate Swap Agreement Investment Securities Gains (Losses), Net (453 ) — (453 ) (1,000 ) Total $ 7,093 $ 2,175 $ 15,366 $ 6,306

Pension Plans and Postretirem_2

Pension Plans and Postretirement Benefit Plan (Tables)	9 Months Ended
	Sep. 30, 2019
Retirement Benefits [Abstract]
Schedule of components of net periodic benefit cost	Components of net periodic benefit cost for the Company’s pension plans and the postretirement benefit plan are presented in the following table for the three and nine months ended September 30, 2019 and 2018 . Pension Benefits Postretirement Benefits (dollars in thousands) 2019 2018 2019 2018 Three Months Ended September 30, Service Cost $ — $ — $ 118 $ 114 Interest Cost 1,094 1,041 258 235 Expected Return on Plan Assets (1,249 ) (1,281 ) — — Amortization of: Prior Service Credit — — (72 ) (142 ) Net Actuarial Losses (Gains) 483 498 (77 ) (61 ) Net Periodic Benefit Cost $ 328 $ 258 $ 227 $ 146 Nine Months Ended September 30, Service Cost $ — $ — $ 353 $ 344 Interest Cost 3,281 3,123 773 706 Expected Return on Plan Assets (3,747 ) (3,845 ) — — Amortization of: Prior Service Credit — — (216 ) (426 ) Net Actuarial Losses (Gains) 1,451 1,494 (233 ) (185 ) Net Periodic Benefit Cost $ 985 $ 772 $ 677 $ 439

Commitments, Contingencies, a_2

Commitments, Contingencies, and Guarantees (Tables)	9 Months Ended
	Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Credit commitments	The Company’s credit commitments as of September 30, 2019 and December 31, 2018 were as follows: (dollars in thousands) September 30, December 31, Unfunded Commitments to Extend Credit $ 2,751,256 $ 2,646,085 Standby Letters of Credit 63,871 62,344 Commercial Letters of Credit 13,433 9,411 Total Credit Commitments $ 2,828,560 $ 2,717,840

Fair Value of Assets and Liab_2

Fair Value of Assets and Liabilities (Tables)	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Balances of assets and liabilities measured at fair value on a recurring basis	The table below presents the balances of assets and liabilities measured at fair value on a recurring basis as of September 30, 2019 and December 31, 2018 : Quoted Prices in Active Markets for Identical Assets or Liabilities Significant Other Observable Inputs Significant Unobservable Inputs (dollars in thousands) (Level 1) (Level 2) (Level 3) Total September 30, 2019 Assets: Investment Securities Available-for-Sale Debt Securities Issued by the U.S. Treasury and Government Agencies $ 1,005 $ 234,680 $ — $ 235,685 Debt Securities Issued by States and Political Subdivisions — 53,982 — 53,982 Debt Securities Issued by U.S. Government-Sponsored Enterprises — 21,895 — 21,895 Debt Securities Issued by Corporations — 348,441 — 348,441 Mortgage-Backed Securities: Residential - Government Agencies — 1,228,637 — 1,228,637 Residential - U.S. Government-Sponsored Enterprises — 537,336 — 537,336 Commercial - Government Agencies — 168,418 — 168,418 Total Mortgage-Backed Securities — 1,934,391 — 1,934,391 Total Investment Securities Available-for-Sale 1,005 2,593,389 — 2,594,394 Loans Held for Sale — 36,720 — 36,720 Mortgage Servicing Rights — — 1,174 1,174 Other Assets 37,865 — — 37,865 Derivatives 1 — 432 40,260 40,692 Total Assets Measured at Fair Value on a $ 38,870 $ 2,630,541 $ 41,434 $ 2,710,845 Liabilities: Derivatives 1 $ — $ 1,089 $ 8,349 $ 9,438 Total Liabilities Measured at Fair Value on a $ — $ 1,089 $ 8,349 $ 9,438 December 31, 2018 Assets: Investment Securities Available-for-Sale Debt Securities Issued by the U.S. Treasury and Government Agencies $ 972 $ 391,429 $ — $ 392,401 Debt Securities Issued by States and Political Subdivisions — 563,996 — 563,996 Debt Securities Issued by U.S. Government-Sponsored Enterprises — 56 — 56 Debt Securities Issued by Corporations — 223,140 — 223,140 Mortgage-Backed Securities: Residential - Government Agencies — 190,442 — 190,442 Residential - U.S. Government-Sponsored Enterprises — 578,527 — 578,527 Commercial - Government Agencies — 59,380 — 59,380 Total Mortgage-Backed Securities — 828,349 — 828,349 Total Investment Securities Available-for-Sale 972 2,006,970 — 2,007,942 Loans Held for Sale — 10,987 — 10,987 Mortgage Servicing Rights — — 1,290 1,290 Other Assets 31,871 — — 31,871 Derivatives 1 — 812 13,792 14,604 Total Assets Measured at Fair Value on a $ 32,843 $ 2,018,769 $ 15,082 $ 2,066,694 Liabilities: Derivatives 1 $ — $ 371 $ 9,376 $ 9,747 Total Liabilities Measured at Fair Value on a $ — $ 371 $ 9,376 $ 9,747 1 The fair value of each class of derivatives is shown in Note 12 Derivative Financial Instruments .
Changes in Level 3 assets and liabilities measured at fair value on a recurring basis	For the three and nine months ended September 30, 2019 and 2018 , the changes in Level 3 assets and liabilities measured at fair value on a recurring basis were as follows: (dollars in thousands) Mortgage Servicing Rights 1 Net Derivative Assets and Liabilities 2 Three Months Ended September 30, 2019 Balance as of July 1, 2019 $ 1,212 $ 19,956 Realized and Unrealized Net Gains (Losses): Included in Net Income (38 ) 4,360 Transfers to Loans Held for Sale — (3,736 ) Variation Margin Payments — 11,331 Balance as of September 30, 2019 $ 1,174 $ 31,911 Total Unrealized Net Gains (Losses) Included in Net Income $ — $ 31,911 Three Months Ended September 30, 2018 Balance as of July 1, 2018 $ 1,366 $ 391 Realized and Unrealized Net Gains (Losses): Included in Net Income (39 ) 730 Transfers to Loans Held for Sale — (1,012 ) Variation Margin Payments — (293 ) Balance as of September 30, 2018 $ 1,327 $ (184 ) Total Unrealized Net Gains (Losses) Included in Net Income $ — $ (184 ) Nine Months Ended September 30, 2019 Balance as of January 1, 2019 $ 1,290 $ 4,416 Realized and Unrealized Net Gains (Losses): Included in Net Income (116 ) 9,602 Transfers to Loans Held for Sale — (7,750 ) Variation Margin Payments — 25,643 Balance as of September 30, 2019 $ 1,174 $ 31,911 Total Unrealized Net Gains (Losses) Included in Net Income $ — $ 31,911 Nine Months Ended September 30, 2018 Balance as of January 1, 2018 $ 1,454 $ 894 Realized and Unrealized Net Gains (Losses): Included in Net Income (127 ) 2,234 Transfers to Loans Held for Sale — (2,591 ) Variation Margin Payments — (721 ) Balance as of September 30, 2018 $ 1,327 $ (184 ) Total Unrealized Net Gains (Losses) Included in Net Income $ — $ (184 ) 1 Realized and unrealized gains and losses related to mortgage servicing rights are reported as a component of mortgage banking income in the Company’s consolidated statements of income. 2 Realized and unrealized gains and losses related to interest rate lock commitments are reported as a component of mortgage banking income in the Company’s consolidated statements of income. Realized and unrealized gains and losses related to interest rate swap agreements are reported as a component of other noninterest income in the Company’s consolidated statements of income.
Summary of the significant unobservable inputs	For Level 3 assets and liabilities measured at fair value on a recurring or nonrecurring basis as of September 30, 2019 and December 31, 2018 , the significant unobservable inputs used in the fair value measurements were as follows: Significant Unobservable Inputs (weighted-average) Fair Value (dollars in thousands) Valuation Technique Description Sept. 30, Dec. 31, Sept. 30, Dec. 31, Mortgage Servicing Rights Discounted Cash Flow Constant Prepayment Rate 1 11.81 % 7.01 % $ 24,848 $ 30,508 Discount Rate 2 6.96 % 9.59 % Net Derivative Assets and Liabilities: Interest Rate Lock Commitments Pricing Model Closing Ratio 91.87 % 89.00 % $ 2,788 $ 871 Interest Rate Swap Agreements Discounted Cash Flow Credit Factor 0.20 % 0.06 % $ 29,123 $ 3,545 1 Represents annualized loan repayment rate assumption. 2 Derived from multiple interest rate scenarios that incorporate a spread to a market yield curve and market volatilities.
Assets and liabilities measured at fair value on a nonrecurring basis	The Company may be required periodically to measure certain assets and liabilities at fair value on a nonrecurring basis in accordance with GAAP. These adjustments to fair value usually result from the application of lower-of-cost-or-fair value accounting or impairment write-downs of individual assets. The following table represents the assets measured at fair value on a nonrecurring basis as of September 30, 2019 . There were no assets measured at fair value on a nonrecurring basis as of December 31, 2018 . (dollars in thousands) Fair Value Hierarchy Net Carrying Amount Valuation Allowance September 30, 2019 Mortgage Servicing Rights - amortization method Level 3 $ 23,674 $ (28 ) Other Assets- Equipment Held for Sale Level 3 — (217 )
Schedule of difference between the aggregate fair value and the aggregate unpaid principal balance of the Company's residential mortgage loans held for sale	The following table reflects the difference between the aggregate fair value and the aggregate unpaid principal balance of the Company’s residential mortgage loans held for sale as of September 30, 2019 and December 31, 2018 . (dollars in thousands) Aggregate Fair Value Aggregate Unpaid Principal Aggregate Fair Value Unpaid Principal September 30, 2019 Loans Held for Sale $ 36,720 $ 36,039 $ 681 December 31, 2018 Loans Held for Sale $ 10,987 $ 10,656 $ 331
Schedule of carrying amount, fair value, and fair value hierarchy of financial instruments	The following presents the carrying amount, fair value, and placement in the fair value hierarchy of the Company’s financial instruments not recorded at fair value on a recurring basis as of September 30, 2019 and December 31, 2018 . This table excludes financial instruments for which the carrying amount approximates fair value. For short-term financial assets such as cash and cash equivalents, the carrying amount is a reasonable estimate of fair value due to the relatively short time between the origination of the instrument and its expected realization. For non-marketable equity securities such as Federal Home Loan Bank and Federal Reserve Bank stock, the carrying amount is a reasonable estimate of fair value as these securities can only be redeemed or sold at their par value and only to the respective issuing government supported institution or to another member institution. For financial liabilities such as noninterest-bearing demand, interest-bearing demand, and savings deposits, the carrying amount is a reasonable estimate of fair value due to these products having no stated maturity. Fair Value Measurements Carrying Quoted Prices in Active Markets for Identical Assets or Liabilities Significant Other Observable Inputs Significant Unobservable Inputs (dollars in thousands) Amount Fair Value (Level 1) (Level 2) (Level 3) September 30, 2019 Financial Instruments - Assets Investment Securities Held-to-Maturity $ 2,946,910 $ 2,972,273 $ 355,442 $ 2,616,831 $ — Loans 1 10,514,438 10,784,711 — — 10,784,711 Financial Instruments - Liabilities Time Deposits 1,806,083 1,805,230 — 1,805,230 Securities Sold Under Agreements to Repurchase 604,299 633,599 — 633,599 Other Debt 2 100,000 100,627 — 100,627 December 31, 2018 Financial Instruments - Assets Investment Securities Held-to-Maturity $ 3,482,092 $ 3,413,994 $ 352,216 $ 3,061,778 $ — Loans 1 10,084,527 10,008,417 — — 10,008,417 Financial Instruments - Liabilities Time Deposits 1,745,522 1,734,447 — 1,734,447 — Securities Sold Under Agreements to Repurchase 504,296 504,288 — 504,288 — Other Debt 2 125,000 124,559 — 124,559 — 1 Carrying amount is net of unearned income and the Allowance. 2 Excludes capitalized lease obligations.

Revenue Recognition (Tables)

Revenue Recognition (Tables)	9 Months Ended
	Sep. 30, 2019
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following presents noninterest income, segregated by revenue streams in-scope and out-of-scope of Topic 606, for the three and nine months ended September 30, 2019 and 2018 . Three Months Ended Nine Months Ended (dollars in thousands) 2019 2018 2019 2018 Noninterest Income In-scope of Topic 606: Trust and Asset Management $ 10,930 $ 10,782 $ 33,076 $ 33,319 Service Charges on Deposit Accounts 3,268 3,194 9,912 9,982 Fees, Exchange, and Other Service Charges 11,705 11,506 34,859 34,556 Annuity and Insurance 1,251 1,311 5,567 4,251 Other 2,224 2,366 7,200 7,176 Noninterest Income (in-scope of Topic 606) 29,378 29,159 90,614 89,284 Noninterest Income (out-of-scope of Topic 606) 17,129 12,323 45,022 37,531 Total Noninterest Income $ 46,507 $ 41,482 $ 135,636 $ 126,815

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Schedule of Lease Assets and Liabilities	The following table represents the consolidated statements of condition classification of the Company’s ROU assets and lease liabilities. The Company elected not to include short-term leases (i.e., leases with initial terms of twelve months or less), or equipment leases (deemed immaterial) on the consolidated statements of condition. (dollars in thousands) September 30, 2019 Lease Right-of-Use Assets Classification Operating lease right-of-use assets Operating Lease Right-of-Use Assets $ 101,005 Finance lease right-of-use assets Premises and Equipment, Net 2,394 Total Lease Right-of-Use Assets $ 103,399 Lease Liabilities Operating lease liabilities Operating Lease Liabilities $ 108,264 Finance lease liabilities Other Debt 10,585 Total Lease Liabilities $ 118,849
Lease cost and other information	September 30, 2019 Weighted-average remaining lease term Operating leases 17.1 years Finance leases 33.3 years Weighted-average discount rate Operating leases 3.67 % Finance leases 7.04 % The following table represents lease costs and other lease information. As the Company elected, for all classes of underlying assets, not to separate lease and non-lease components and instead to account for them as a single lease component, the variable lease cost primarily represents variable payments such as common area maintenance and utilities. Variable lease cost also includes payments for ATM location leases in which payments are based on a percentage of ATM transactions (i.e., ATM surcharge fees), rather than a fixed amount. (dollars in thousands) Three Months Ended Nine Months Ended Lease Costs Operating lease cost $ 3,136 $ 9,495 Variable lease cost 998 2,592 Short-term lease cost 153 370 Finance lease cost Interest on lease liabilities 1 187 561 Amortization of right-of-use assets 18 54 Sublease income (2,122 ) (6,383 ) Net lease cost $ 2,370 $ 6,689 Other Information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 3,259 $ 9,584 Operating cash flows from finance leases 187 561 Financing cash flows from finance leases 20 58 Right-of-use assets obtained in exchange for new operating lease liabilities 392 2,117 Right-of-use assets obtained in exchange for new finance lease liabilities — — 1 Included in other debt interest expense in the Company’s consolidated statements of income. All other lease costs in this table are included in net occupancy expense.
Finance Lease, Liability, Maturity	Future minimum payments for finance leases and operating leases with initial or remaining terms of one year or more as of September 30, 2019 were as follows: (dollars in thousands) Finance Leases Operating Leases Twelve Months Ended: September 30, 2020 $ 825 $ 12,059 September 30, 2021 825 11,338 September 30, 2022 825 10,700 September 30, 2023 825 9,824 September 30, 2024 825 8,558 Thereafter 23,311 102,033 Total Future Minimum Lease Payments 27,436 154,512 Amounts Representing Interest (16,851 ) (46,248 ) Present Value of Net Future Minimum Lease Payments $ 10,585 $ 108,264
Lessee, Operating Lease, Liability, Maturity	Future minimum payments for finance leases and operating leases with initial or remaining terms of one year or more as of September 30, 2019 were as follows: (dollars in thousands) Finance Leases Operating Leases Twelve Months Ended: September 30, 2020 $ 825 $ 12,059 September 30, 2021 825 11,338 September 30, 2022 825 10,700 September 30, 2023 825 9,824 September 30, 2024 825 8,558 Thereafter 23,311 102,033 Total Future Minimum Lease Payments 27,436 154,512 Amounts Representing Interest (16,851 ) (46,248 ) Present Value of Net Future Minimum Lease Payments $ 10,585 $ 108,264

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Variable Interest Entities) (Details 1) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Unfunded commitments to fund low-income housing partnerships	$ 16,868
Other Assets
Variable Interest Entity [Line Items]
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets	81,200	$ 85,900
Other Liabilities
Variable Interest Entity [Line Items]
Unfunded commitments to fund low-income housing partnerships	$ 16,900	$ 15,200
Low-income housing partnerships
Variable Interest Entity [Line Items]
Period over which Federal tax credits or benefits are generally recognized (in years)	10 years
Period over which State tax credits or benefits are generally recognized (in years)	5 years
Solar energy partnerships [Member]
Variable Interest Entity [Line Items]
Period over which Federal tax credits or benefits are generally recognized (in years)	6 years

Cash and Cash Equivalents (Deta

Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Cash and Cash Equivalents [Abstract]
Interest-Bearing Deposits in Other Banks	$ 2,946	$ 3,028
Funds Sold	108,446	198,860
Cash and Due From Banks	259,492	324,081
Total Cash and Cash Equivalents	$ 370,884	$ 525,969

Investment Securities (Amortiza

Investment Securities (Amortization Cost, Gross Unrealized Gains/Losses, and Fair Value) (Details 1) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Available-for-Sale:
Available-for-Sale: Amortized Cost	$ 2,575,030	$ 2,022,158
Available-for-Sale: Gross Unrealized Gains	27,812	9,225
Available-for-Sale: Gross Unrealized Losses	(8,448)	(23,441)
Available-for-Sale	2,594,394	2,007,942
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Held-to-Maturity: Amortized Cost	2,946,910	3,482,092
Held-to-Maturity: Gross Unrealized Gains	33,631	11,959
Held-to-Maturity: Gross Unrealized Losses	(8,268)	(80,057)
Held-to-Maturity: Fair Value	2,972,273	3,413,994
Debt Securities Issued by Government-Sponsored Enterprises
Available-for-Sale:
Available-for-Sale: Amortized Cost	21,969	56
Available-for-Sale: Gross Unrealized Gains	18	0
Available-for-Sale: Gross Unrealized Losses	(92)	0
Available-for-Sale	21,895	56
Residential - Government Agencies
Available-for-Sale:
Available-for-Sale: Amortized Cost	1,215,859	189,645
Available-for-Sale: Gross Unrealized Gains	15,731	1,726
Available-for-Sale: Gross Unrealized Losses	(2,953)	(929)
Available-for-Sale	1,228,637	190,442
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Held-to-Maturity: Amortized Cost	1,144,257	1,861,874
Held-to-Maturity: Gross Unrealized Gains	16,945	3,886
Held-to-Maturity: Gross Unrealized Losses	(5,137)	(51,773)
Held-to-Maturity: Fair Value	1,156,065	1,813,987
Residential - U.S. Government-Sponsored Enterprises
Available-for-Sale:
Available-for-Sale: Amortized Cost	532,885	589,311
Available-for-Sale: Gross Unrealized Gains	5,769	1,779
Available-for-Sale: Gross Unrealized Losses	(1,318)	(12,563)
Available-for-Sale	537,336	578,527
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Held-to-Maturity: Amortized Cost	1,282,944	758,835
Held-to-Maturity: Gross Unrealized Gains	13,456	1,590
Held-to-Maturity: Gross Unrealized Losses	(2,105)	(20,259)
Held-to-Maturity: Fair Value	1,294,295	740,166
Commercial - Government Agencies
Available-for-Sale:
Available-for-Sale: Amortized Cost	166,306	63,864
Available-for-Sale: Gross Unrealized Gains	3,689	0
Available-for-Sale: Gross Unrealized Losses	(1,577)	(4,484)
Available-for-Sale	168,418	59,380
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Held-to-Maturity: Amortized Cost	84,824	176,393
Held-to-Maturity: Gross Unrealized Gains	474	147
Held-to-Maturity: Gross Unrealized Losses	(750)	(5,177)
Held-to-Maturity: Fair Value	84,548	171,363
Mortgage-Backed Securities
Available-for-Sale:
Available-for-Sale: Amortized Cost	1,915,050	842,820
Available-for-Sale: Gross Unrealized Gains	25,189	3,505
Available-for-Sale: Gross Unrealized Losses	(5,848)	(17,976)
Available-for-Sale	1,934,391	828,349
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Held-to-Maturity: Amortized Cost	2,512,025	2,797,102
Held-to-Maturity: Gross Unrealized Gains	30,875	5,623
Held-to-Maturity: Gross Unrealized Losses	(7,992)	(77,209)
Held-to-Maturity: Fair Value	2,534,908	2,725,516
Debt Securities Issued by the U.S. Treasury and Government Agencies
Available-for-Sale:
Available-for-Sale: Amortized Cost	236,794	394,485
Available-for-Sale: Gross Unrealized Gains	283	493
Available-for-Sale: Gross Unrealized Losses	(1,392)	(2,577)
Available-for-Sale	235,685	392,401
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Held-to-Maturity: Amortized Cost	354,073	353,122
Held-to-Maturity: Gross Unrealized Gains	1,502	186
Held-to-Maturity: Gross Unrealized Losses	(133)	(1,093)
Held-to-Maturity: Fair Value	355,442	352,215
Debt Securities Issued by States and Political Subdivisions
Available-for-Sale:
Available-for-Sale: Amortized Cost	53,211	559,800
Available-for-Sale: Gross Unrealized Gains	772	5,227
Available-for-Sale: Gross Unrealized Losses	(1)	(1,031)
Available-for-Sale	53,982	563,996
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Held-to-Maturity: Amortized Cost	65,109	234,602
Held-to-Maturity: Gross Unrealized Gains	1,254	6,150
Held-to-Maturity: Gross Unrealized Losses	0	0
Held-to-Maturity: Fair Value	66,363	240,752
Debt Securities Issued by Corporations
Available-for-Sale:
Available-for-Sale: Amortized Cost	348,006	224,997
Available-for-Sale: Gross Unrealized Gains	1,550	0
Available-for-Sale: Gross Unrealized Losses	(1,115)	(1,857)
Available-for-Sale	348,441	223,140
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Held-to-Maturity: Amortized Cost	15,703	97,266
Held-to-Maturity: Gross Unrealized Gains	0	0
Held-to-Maturity: Gross Unrealized Losses	(143)	(1,755)
Held-to-Maturity: Fair Value	$ 15,560	$ 95,511

Investment Securities (Contract

Investment Securities (Contractual Maturities and Narrative) (Details 2) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis Rolling Maturity[Abstract]
Due in One Year or Less	$ 169,544
Due After One Year Through Five Years	120,351
Due After Five Years Through Ten Years	134,235
Due After Ten Years	51
Amortized Cost, Total	424,181
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Rolling Maturities [Abstract]
Due in One Year or Less	169,762
Due After One Year Through Five Years	120,126
Due After Five Years Through Ten Years	135,383
Due After Ten Years	52
Fair Value, Total	425,323
Available-for-Sale: Amortized Cost	2,575,030	$ 2,022,158
Available-for-Sale: Fair Value	2,594,394	2,007,942
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis, Rolling Maturities (Abstract]
Due in One Year or Less	304,243
Due After One Year Through Five Years	119,592
Due After Five Years Through Ten Years	11,050
Amortized Cost, Total	434,885
Held-to-Maturity Securities, Debt Maturities, Single Maturity Date, Fair Value, Rolling Maturities [Abstract]
Due in One Year or Less	305,141
Due After One Year Through Five Years	121,302
Due After Five Years Through Ten Years	10,922
Fair Value, Total	437,365
Held-to-Maturity: Amortized Cost	2,946,910
Held-to-Maturity: Fair Value	2,972,273	3,413,994
Carrying value of investment securities which were pledged to secure deposits of gov't entities and repos	2,600,000	2,300,000
Debt Securities Issued by Government Agencies
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Rolling Maturities [Abstract]
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Amortized Cost	235,799
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Fair Value	234,680
Debt Securities Issued by Government-Sponsored Enterprises
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Rolling Maturities [Abstract]
Available-for-Sale: Amortized Cost	21,969	56
Available-for-Sale: Fair Value	21,895	56
Residential - Government Agencies
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Rolling Maturities [Abstract]
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Amortized Cost	1,215,859
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Fair Value	1,228,637
Available-for-Sale: Amortized Cost	1,215,859	189,645
Available-for-Sale: Fair Value	1,228,637	190,442
Held-to-Maturity Securities, Debt Maturities, Single Maturity Date, Fair Value, Rolling Maturities [Abstract]
Held-to-Maturity: Mortgage-Backed Securities: Amortized Cost	1,144,257
Held-to-Maturity: Mortgage-Backed Securities: Fair Value	1,156,065
Held-to-Maturity: Fair Value	1,156,065	1,813,987
Residential - U.S. Government-Sponsored Enterprises
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Rolling Maturities [Abstract]
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Amortized Cost	532,885
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Fair Value	537,336
Available-for-Sale: Amortized Cost	532,885	589,311
Available-for-Sale: Fair Value	537,336	578,527
Held-to-Maturity Securities, Debt Maturities, Single Maturity Date, Fair Value, Rolling Maturities [Abstract]
Held-to-Maturity: Mortgage-Backed Securities: Amortized Cost	1,282,944
Held-to-Maturity: Mortgage-Backed Securities: Fair Value	1,294,295
Held-to-Maturity: Fair Value	1,294,295	740,166
Commercial - Government Agencies
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Rolling Maturities [Abstract]
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Amortized Cost	166,306
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Fair Value	168,418
Available-for-Sale: Amortized Cost	166,306	63,864
Available-for-Sale: Fair Value	168,418	59,380
Held-to-Maturity Securities, Debt Maturities, Single Maturity Date, Fair Value, Rolling Maturities [Abstract]
Held-to-Maturity: Mortgage-Backed Securities: Amortized Cost	84,824
Held-to-Maturity: Mortgage-Backed Securities: Fair Value	84,548
Held-to-Maturity: Fair Value	84,548	171,363
Mortgage-Backed Securities
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Rolling Maturities [Abstract]
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Amortized Cost	1,915,050
Available-for-sale Securities, Debt Securities Issued by Government Agencies and Mortgage-Backed Securities: Fair Value	1,934,391
Available-for-Sale: Amortized Cost	1,915,050	842,820
Available-for-Sale: Fair Value	1,934,391	828,349
Held-to-Maturity Securities, Debt Maturities, Single Maturity Date, Fair Value, Rolling Maturities [Abstract]
Held-to-Maturity: Mortgage-Backed Securities: Amortized Cost	2,512,025
Held-to-Maturity: Mortgage-Backed Securities: Fair Value	2,534,908
Held-to-Maturity: Fair Value	$ 2,534,908	$ 2,725,516

Investment Securities (Gains an

Investment Securities (Gains and Losses on Sales) (Details 3) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Gain on Sale of Investments	$ 38	$ 0	$ 7,701	$ 0
Gain (Loss) on Sale of Investments	(1,469)	(729)	(3,080)	(3,097)
Loss on Sale of Investments	$ (1,507)	$ (729)	$ (10,781)	$ (3,097)

Investment Securities (Unrealiz

Investment Securities (Unrealized Position - Less than 12 Mos., 12 Mos. or Longer) (Details 4) $ in Thousands	Sep. 30, 2019USD ($)security	Dec. 31, 2018USD ($)
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] (Deprecated 2019-01-31)
Less Than 12 Months, Fair Value	$ 234,737	$ 261,265
Less Than 12 Months, Gross Unrealized Losses	(1,369)	(1,264)
12 Months or Longer, Fair Value	541,902	1,045,677
12 Months or Longer, Gross Unrealized Losses	(7,079)	(22,177)
Total Fair Value	776,639	1,306,942
Total Gross Unrealized Losses	(8,448)	(23,441)
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value	241,162	131,631
Less Than 12 Months, Gross Unrealized Losses	(605)	(343)
12 Months or Longer, Fair Value	546,039	2,484,212
12 Months or Longer, Gross Unrealized Losses	(7,663)	(79,714)
Total Fair Value	787,201	2,615,843
Total Gross Unrealized Losses	$ (8,268)	(80,057)
Number of Investment Securities in an Unrealized Loss Position | security	233
Debt Securities Issued by the U.S. Treasury and Government Agencies
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] (Deprecated 2019-01-31)
Less Than 12 Months, Fair Value	$ 64,180	157,058
Less Than 12 Months, Gross Unrealized Losses	(115)	(964)
12 Months or Longer, Fair Value	107,800	173,763
12 Months or Longer, Gross Unrealized Losses	(1,277)	(1,613)
Total Fair Value	171,980	330,821
Total Gross Unrealized Losses	(1,392)	(2,577)
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value	0	99,440
Less Than 12 Months, Gross Unrealized Losses	0	(237)
12 Months or Longer, Fair Value	39,912	134,239
12 Months or Longer, Gross Unrealized Losses	(133)	(856)
Total Fair Value	39,912	233,679
Total Gross Unrealized Losses	(133)	(1,093)
Debt Securities Issued by States and Political Subdivisions
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] (Deprecated 2019-01-31)
Less Than 12 Months, Fair Value	181	38,138
Less Than 12 Months, Gross Unrealized Losses	0	(59)
12 Months or Longer, Fair Value	468	156,772
12 Months or Longer, Gross Unrealized Losses	(1)	(972)
Total Fair Value	649	194,910
Total Gross Unrealized Losses	(1)	(1,031)
Debt Securities Issued by Government-Sponsored Enterprises
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] (Deprecated 2019-01-31)
Less Than 12 Months, Fair Value	21,233
Less Than 12 Months, Gross Unrealized Losses	(92)
12 Months or Longer, Fair Value	0
12 Months or Longer, Gross Unrealized Losses	0
Total Fair Value	21,233
Total Gross Unrealized Losses	(92)
Debt Securities Issued by Corporations
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] (Deprecated 2019-01-31)
Less Than 12 Months, Fair Value	25,808	59,770
Less Than 12 Months, Gross Unrealized Losses	(581)	(231)
12 Months or Longer, Fair Value	114,466	163,371
12 Months or Longer, Gross Unrealized Losses	(534)	(1,626)
Total Fair Value	140,274	223,141
Total Gross Unrealized Losses	(1,115)	(1,857)
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value	4,638	0
Less Than 12 Months, Gross Unrealized Losses	(15)	0
12 Months or Longer, Fair Value	10,922	95,511
12 Months or Longer, Gross Unrealized Losses	(128)	(1,755)
Total Fair Value	15,560	95,511
Total Gross Unrealized Losses	(143)	(1,755)
Residential - Government Agencies
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] (Deprecated 2019-01-31)
Less Than 12 Months, Fair Value	62,749	6,299
Less Than 12 Months, Gross Unrealized Losses	(173)	(10)
12 Months or Longer, Fair Value	182,660	19,011
12 Months or Longer, Gross Unrealized Losses	(2,780)	(919)
Total Fair Value	245,409	25,310
Total Gross Unrealized Losses	(2,953)	(929)
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value	76,076	12,974
Less Than 12 Months, Gross Unrealized Losses	(278)	(45)
12 Months or Longer, Fair Value	277,116	1,491,747
12 Months or Longer, Gross Unrealized Losses	(4,859)	(51,728)
Total Fair Value	353,192	1,504,721
Total Gross Unrealized Losses	(5,137)	(51,773)
Residential - U.S. Government-Sponsored Enterprises
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] (Deprecated 2019-01-31)
Less Than 12 Months, Fair Value	60,586	0
Less Than 12 Months, Gross Unrealized Losses	(408)	0
12 Months or Longer, Fair Value	82,390	473,380
12 Months or Longer, Gross Unrealized Losses	(910)	(12,563)
Total Fair Value	142,976	473,380
Total Gross Unrealized Losses	(1,318)	(12,563)
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value	160,448	0
Less Than 12 Months, Gross Unrealized Losses	(312)	0
12 Months or Longer, Fair Value	165,075	617,000
12 Months or Longer, Gross Unrealized Losses	(1,793)	(20,259)
Total Fair Value	325,523	617,000
Total Gross Unrealized Losses	(2,105)	(20,259)
Commercial - Government Agencies
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] (Deprecated 2019-01-31)
Less Than 12 Months, Fair Value	0	0
Less Than 12 Months, Gross Unrealized Losses	0	0
12 Months or Longer, Fair Value	54,118	59,380
12 Months or Longer, Gross Unrealized Losses	(1,577)	(4,484)
Total Fair Value	54,118	59,380
Total Gross Unrealized Losses	(1,577)	(4,484)
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value	0	19,217
Less Than 12 Months, Gross Unrealized Losses	0	(61)
12 Months or Longer, Fair Value	53,014	145,715
12 Months or Longer, Gross Unrealized Losses	(750)	(5,116)
Total Fair Value	53,014	164,932
Total Gross Unrealized Losses	(750)	(5,177)
Mortgage-Backed Securities
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] (Deprecated 2019-01-31)
Less Than 12 Months, Fair Value	123,335	6,299
Less Than 12 Months, Gross Unrealized Losses	(581)	(10)
12 Months or Longer, Fair Value	319,168	551,771
12 Months or Longer, Gross Unrealized Losses	(5,267)	(17,966)
Total Fair Value	442,503	558,070
Total Gross Unrealized Losses	(5,848)	(17,976)
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months, Fair Value	236,524	32,191
Less Than 12 Months, Gross Unrealized Losses	(590)	(106)
12 Months or Longer, Fair Value	495,205	2,254,462
12 Months or Longer, Gross Unrealized Losses	(7,402)	(77,103)
Total Fair Value	731,729	2,286,653
Total Gross Unrealized Losses	$ (7,992)	$ (77,209)

(Interest Income - Taxable_Non-

(Interest Income - Taxable/Non-Taxable Invest. Sec.) (Details 5) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Interest Income from Investment Securities, Taxable	$ 35,584	$ 28,855	$ 102,912	$ 85,931
Interest Income from Investment Securities, Non-Taxable	724	4,554	5,970	14,006
Total Interest Income from Investment Securities	$ 36,308	$ 33,409	$ 108,882	$ 99,937

(FHLB and FRB Stocks) (Details

(FHLB and FRB Stocks) (Details 7) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Federal Home Loan Bank Stock	$ 14,000	$ 15,000
Federal Reserve Bank Stock	21,093	20,858
Total	$ 35,093	$ 35,858

Investment Securities (Visa Cla

Investment Securities (Visa Class B Restricted Shares Narrative) (Details 8)	Sep. 27, 2019	Sep. 26, 2019	Jun. 28, 2018	Jun. 27, 2018	Sep. 30, 2019shares
Visa Conversion Rate Swap Agreement
Net Investment Income [Line Items]
Conversion ratio	1.6228	1.6298	1.6298	1.6483	1.6228
Equity securities remaining, shares					83,014
Visa Class A Unrestricted Securities
Net Investment Income [Line Items]
Equity securities remaining, shares					134,715

Loans and Leases and the Allo_3

Loans and Leases and the Allowance for Loan and Lease Losses (Loans and Leases Portfolio and Narrative) (Details 1) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Loan and lease portfolio
Loans and Leases	$ 10,881,298	$ 10,231,062	$ 10,881,298	$ 10,231,062	$ 10,448,774
Net Gains Related to Sales of Residential Mortgage Loans	2,500	400	4,100	1,100
Commercial
Loan and lease portfolio
Loans and Leases	4,156,733	3,900,308	4,156,733	3,900,308	3,979,792
Commercial | Commercial and Industrial
Loan and lease portfolio
Loans and Leases	1,361,011		1,361,011		1,331,149
Commercial | Commercial Mortgage
Loan and lease portfolio
Loans and Leases	2,477,296		2,477,296		2,302,356
Commercial | Construction
Loan and lease portfolio
Loans and Leases	154,754		154,754		170,061
Commercial | Lease Financing
Loan and lease portfolio
Loans and Leases	163,672		163,672		176,226
Consumer
Loan and lease portfolio
Loans and Leases	6,724,565	$ 6,330,754	6,724,565	$ 6,330,754	6,468,982
Consumer | Residential Mortgage
Loan and lease portfolio
Loans and Leases	3,846,511		3,846,511		3,673,796
Consumer | Home Equity
Loan and lease portfolio
Loans and Leases	1,681,951		1,681,951		1,681,442
Consumer | Automobile
Loan and lease portfolio
Loans and Leases	713,424		713,424		658,133
Consumer | Other
Loan and lease portfolio
Loans and Leases	$ 482,679		$ 482,679		$ 455,611

Loans and Leases and the Allo_4

Loans and Leases and the Allowance for Loan and Lease Losses (Allowance for Loan and Lease Losses) (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Allowance for Loan and Lease Losses:
Balance at Beginning of Period	$ 107,672	$ 108,188	$ 106,693	$ 107,346
Loans and Leases Charged-Off	(5,755)	(6,027)	(17,712)	(17,676)
Recoveries on Loans and Leases Previously Charged-Off	2,769	2,729	8,705	7,595
Net Loans and Leases Recovered (Charged-Off)	(2,986)	(3,298)	(9,007)	(10,081)
Provision for Credit Losses	4,250	3,800	11,250	11,425
Balance at End of Period	108,936	108,690	108,936	108,690
Allowance for Loan and Lease Losses:
Individually Evaluated for Impairment					$ 3,381		$ 3,945
Collectively Evaluated for Impairment					105,555		104,745
Total	107,672	108,188	108,936	107,346	108,936	$ 106,693	108,690
Recorded Investment in Loans and Leases:
Individually Evaluated for Impairment					59,989		54,408
Collectively Evaluated for Impairment					10,821,309		10,176,654
Total Loans and Leases					10,881,298	10,448,774	10,231,062
Commercial
Allowance for Loan and Lease Losses:
Balance at Beginning of Period	69,268	63,712	66,874	65,822
Loans and Leases Charged-Off	(239)	(449)	(2,431)	(1,140)
Recoveries on Loans and Leases Previously Charged-Off	318	542	1,220	1,236
Net Loans and Leases Recovered (Charged-Off)	79	93	(1,211)	96
Provision for Credit Losses	1,023	1,274	4,707	(839)
Balance at End of Period	70,370	65,079	70,370	65,079
Allowance for Loan and Lease Losses:
Individually Evaluated for Impairment					115		135
Collectively Evaluated for Impairment					70,255		64,944
Total	69,268	63,712	70,370	65,822	70,370	66,874	65,079
Recorded Investment in Loans and Leases:
Individually Evaluated for Impairment					19,324		12,190
Collectively Evaluated for Impairment					4,137,409		3,888,118
Total Loans and Leases					4,156,733	3,979,792	3,900,308
Consumer
Allowance for Loan and Lease Losses:
Balance at Beginning of Period	38,404	44,476	39,819	41,524
Loans and Leases Charged-Off	(5,516)	(5,578)	(15,281)	(16,536)
Recoveries on Loans and Leases Previously Charged-Off	2,451	2,187	7,485	6,359
Net Loans and Leases Recovered (Charged-Off)	(3,065)	(3,391)	(7,796)	(10,177)
Provision for Credit Losses	3,227	2,526	6,543	12,264
Balance at End of Period	38,566	43,611	38,566	43,611
Allowance for Loan and Lease Losses:
Individually Evaluated for Impairment					3,266		3,810
Collectively Evaluated for Impairment					35,300		39,801
Total	$ 38,404	$ 44,476	$ 39,819	$ 43,611	38,566	39,819	43,611
Recorded Investment in Loans and Leases:
Individually Evaluated for Impairment					40,665		42,218
Collectively Evaluated for Impairment					6,683,900		6,288,536
Total Loans and Leases					$ 6,724,565	$ 6,468,982	$ 6,330,754

Loans and Leases and the Allo_5

Loans and Leases and the Allowance for Loan and Lease Losses (Credit Quality Indicators & Narrative) (Details 3) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	$ 10,881,298	$ 10,448,774	$ 10,231,062
Classified
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Number of months up to which residential and home equity loans may be considered classified, even if they are current as to principal and interest	6 months
Residential Mortgage | Classified
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Number of days past due for loans and leases in classified credit quality indicator	90 days
Maximum current loan-to-value ratio for residential mortgage and home equity loans to be considered as pass (as a percent)	60.00%
Home Equity | Classified
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Number of days past due for loans and leases in classified credit quality indicator	90 days
Maximum current loan-to-value ratio for residential mortgage and home equity loans to be considered as pass (as a percent)	60.00%
Commercial
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	$ 4,156,733	3,979,792	3,900,308
Commercial | Pass
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	4,030,039	3,902,369
Commercial | Special Mention
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	60,626	48,161
Commercial | Classified
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	66,068	29,262
Commercial | Commercial and Industrial
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	1,361,011	1,331,149
Commercial | Commercial and Industrial | Pass
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	1,305,019	1,302,278
Commercial | Commercial and Industrial | Special Mention
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	19,394	17,688
Commercial | Commercial and Industrial | Classified
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	36,598	11,183
Commercial | Commercial Mortgage
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	2,477,296	2,302,356
Commercial | Commercial Mortgage | Pass
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	2,413,316	2,256,128
Commercial | Commercial Mortgage | Special Mention
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	37,454	30,468
Commercial | Commercial Mortgage | Classified
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	26,526	15,760
Commercial | Construction
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	154,754	170,061
Commercial | Construction | Pass
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	149,757	168,740
Commercial | Construction | Special Mention
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	3,778	0
Commercial | Construction | Classified
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	1,219	1,321
Commercial | Lease Financing
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	163,672	176,226
Commercial | Lease Financing | Pass
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	161,947	175,223
Commercial | Lease Financing | Special Mention
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	0	5
Commercial | Lease Financing | Classified
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	1,725	998
Consumer
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	6,724,565	6,468,982	$ 6,330,754
Consumer | Pass
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	$ 6,715,196	6,457,985
Consumer | Classified
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Number of days past due for loans and leases in classified credit quality indicator	90 days
Total Recorded Investment in Loans and Leases	$ 9,369	10,997
Consumer | Residential Mortgage
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	3,846,511	3,673,796
Consumer | Residential Mortgage | Pass
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	3,841,820	3,668,475
Consumer | Residential Mortgage | Classified
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	4,691	5,321
Consumer | Home Equity
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	1,681,951	1,681,442
Consumer | Home Equity | Pass
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	1,678,930	1,677,193
Consumer | Home Equity | Classified
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	3,021	4,249
Consumer | Automobile
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	713,424	658,133
Consumer | Automobile | Pass
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	712,842	657,620
Consumer | Automobile | Classified
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	582	513
Consumer | Other
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	482,679	455,611
Consumer | Other | Pass
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	481,604	454,697
Consumer | Other | Classified
Recorded Investment in Loans and Leases by Class and by Credit Quality Indicator
Total Recorded Investment in Loans and Leases	$ 1,075	$ 914

Loans and Leases and the Allo_6

Loans and Leases and the Allowance for Loan and Lease Losses (Aging Analysis) (Details 4) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	$ 18,706	$ 11,574
Total Past Due and Non-Accrual	55,563	52,104
Current	10,825,735	10,396,670
Total Loans and Leases	10,881,298	10,448,774	$ 10,231,062
Non-Accrual Loans and Leases that are Current	$ 13,260	4,523
Number of days non-accrual loans are not past due	30 days
30 - 59 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	$ 24,004	28,141
60 - 89 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	6,762	5,822
Past Due 90 Days or More
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	6,091	6,567
Commercial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	11,661	2,582
Total Past Due and Non-Accrual	13,449	6,924
Current	4,143,284	3,972,868
Total Loans and Leases	4,156,733	3,979,792	3,900,308
Non-Accrual Loans and Leases that are Current	11,536	2,555
Commercial | 30 - 59 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	1,576	4,214
Commercial | 60 - 89 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	131	118
Commercial | Past Due 90 Days or More
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	81	10
Commercial | Commercial and Industrial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	573	542
Total Past Due and Non-Accrual	1,611	4,323
Current	1,359,400	1,326,826
Total Loans and Leases	1,361,011	1,331,149
Non-Accrual Loans and Leases that are Current	448	515
Commercial | Commercial and Industrial | 30 - 59 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	826	3,653
Commercial | Commercial and Industrial | 60 - 89 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	131	118
Commercial | Commercial and Industrial | Past Due 90 Days or More
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	81	10
Commercial | Commercial Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	11,088	2,040
Total Past Due and Non-Accrual	11,838	2,601
Current	2,465,458	2,299,755
Total Loans and Leases	2,477,296	2,302,356
Non-Accrual Loans and Leases that are Current	11,088	2,040
Commercial | Commercial Mortgage | 30 - 59 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	750	561
Commercial | Commercial Mortgage | 60 - 89 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Commercial | Commercial Mortgage | Past Due 90 Days or More
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Commercial | Construction
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	0	0
Total Past Due and Non-Accrual	0	0
Current	154,754	170,061
Total Loans and Leases	154,754	170,061
Non-Accrual Loans and Leases that are Current	0	0
Commercial | Construction | 30 - 59 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Commercial | Construction | 60 - 89 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Commercial | Construction | Past Due 90 Days or More
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Commercial | Lease Financing
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	0	0
Total Past Due and Non-Accrual	0	0
Current	163,672	176,226
Total Loans and Leases	163,672	176,226
Non-Accrual Loans and Leases that are Current	0	0
Commercial | Lease Financing | 30 - 59 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Commercial | Lease Financing | 60 - 89 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Commercial | Lease Financing | Past Due 90 Days or More
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Consumer
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	7,045	8,992
Total Past Due and Non-Accrual	42,114	45,180
Current	6,682,451	6,423,802
Total Loans and Leases	6,724,565	6,468,982	$ 6,330,754
Non-Accrual Loans and Leases that are Current	1,724	1,968
Consumer | 30 - 59 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	22,428	23,927
Consumer | 60 - 89 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	6,631	5,704
Consumer | Past Due 90 Days or More
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	6,010	6,557
Consumer | Residential Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	4,258	5,321
Total Past Due and Non-Accrual	10,935	13,724
Current	3,835,576	3,660,072
Total Loans and Leases	3,846,511	3,673,796
Non-Accrual Loans and Leases that are Current	782	1,203
Consumer | Residential Mortgage | 30 - 59 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	3,666	5,319
Consumer | Residential Mortgage | 60 - 89 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	979	638
Consumer | Residential Mortgage | Past Due 90 Days or More
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	2,032	2,446
Consumer | Home Equity
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	2,787	3,671
Total Past Due and Non-Accrual	9,712	11,259
Current	1,672,239	1,670,183
Total Loans and Leases	1,681,951	1,681,442
Non-Accrual Loans and Leases that are Current	942	765
Consumer | Home Equity | 30 - 59 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	2,446	3,323
Consumer | Home Equity | 60 - 89 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	2,159	1,581
Consumer | Home Equity | Past Due 90 Days or More
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	2,320	2,684
Consumer | Automobile
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	0	0
Total Past Due and Non-Accrual	16,072	15,125
Current	697,352	643,008
Total Loans and Leases	713,424	658,133
Non-Accrual Loans and Leases that are Current	0	0
Consumer | Automobile | 30 - 59 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	13,809	12,372
Consumer | Automobile | 60 - 89 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	1,681	2,240
Consumer | Automobile | Past Due 90 Days or More
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	582	513
Consumer | Other
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	0	0
Total Past Due and Non-Accrual	5,395	5,072
Current	477,284	450,539
Total Loans and Leases	482,679	455,611
Non-Accrual Loans and Leases that are Current	0	0
Consumer | Other | 30 - 59 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	2,507	2,913
Consumer | Other | 60 - 89 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	1,812	1,245
Consumer | Other | Past Due 90 Days or More
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	$ 1,076	$ 914

Loans and Leases and the Allo_7

Loans and Leases and the Allowance for Loan and Lease Losses (Impaired Loans) (Details 5) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Impaired Loans Information:
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	$ 16,655		$ 16,655		$ 8,620
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	21,772		21,772		12,120
Impaired Financing Receivable, with Related Allowance, Recorded Investment	43,334		43,334		46,005
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	47,209		47,209		50,130
Related Allowance for Loan Losses	3,381		3,381		3,976
Recorded Investment	59,989		59,989		54,625
Unpaid Principal Balance	68,981		68,981		62,250
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	14,244	$ 10,440	12,357	$ 13,585
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized, Accrual Method	105	65	342	423
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	47,133	43,848	46,487	43,213
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized, Accrual Method	573	918	1,769	2,069
Impaired Loans Average Recorded Investment	61,377	54,288	58,844	56,798
Impaired Loans Interest Income Recognized	678	983	2,111	2,492
Commercial
Impaired Loans Information:
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	16,655		16,655		8,620
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	21,772		21,772		12,120
Impaired Financing Receivable, with Related Allowance, Recorded Investment	2,669		2,669		3,678
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	2,952		2,952		3,921
Related Allowance for Loan Losses	115		115		222
Recorded Investment	19,324		19,324		12,298
Unpaid Principal Balance	24,724		24,724		16,041
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	14,244	10,440	12,357	13,585
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized, Accrual Method	105	65	342	423
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	5,814	1,748	4,654	1,570
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized, Accrual Method	9	72	56	98
Impaired Loans Average Recorded Investment	20,058	12,188	17,011	15,155
Impaired Loans Interest Income Recognized	114	137	398	521
Commercial | Commercial and Industrial
Impaired Loans Information:
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	4,439		4,439		4,587
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	4,439		4,439		4,587
Impaired Financing Receivable, with Related Allowance, Recorded Investment	942		942		1,856
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	1,225		1,225		2,099
Related Allowance for Loan Losses	84		84		130
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	4,642	5,900	4,760	6,927
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized, Accrual Method	70	48	233	244
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	1,312	1,537	1,499	1,347
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized, Accrual Method	7	55	50	75
Commercial | Commercial Mortgage
Impaired Loans Information:
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	10,997		10,997		2,712
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	16,114		16,114		6,212
Impaired Financing Receivable, with Related Allowance, Recorded Investment	1,727		1,727		1,822
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	1,727		1,727		1,822
Related Allowance for Loan Losses	31		31		92
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	8,359	3,179	6,322	5,285
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized, Accrual Method	15	15	47	132
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	4,502	211	3,155	223
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized, Accrual Method	2	17	6	23
Commercial | Construction
Impaired Loans Information:
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	1,219		1,219		1,321
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	1,219		1,219		1,321
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	1,243	1,361	1,275	1,373
Impaired Financing Receivable, with No Related Allowance, Interest Income Recognized, Accrual Method	20	2	62	47
Consumer
Impaired Loans Information:
Impaired Financing Receivable, with Related Allowance, Recorded Investment	40,665		40,665		42,327
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	44,257		44,257		46,209
Related Allowance for Loan Losses	3,266		3,266		3,754
Recorded Investment	40,665		40,665		42,327
Unpaid Principal Balance	44,257		44,257		46,209
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	41,319	42,100	41,833	41,643
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized, Accrual Method	564	846	1,713	1,971
Impaired Loans Average Recorded Investment	41,319	42,100	41,833	41,643
Impaired Loans Interest Income Recognized	564	846	1,713	1,971
Consumer | Residential Mortgage
Impaired Loans Information:
Impaired Financing Receivable, with Related Allowance, Recorded Investment	18,129		18,129		19,753
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	21,721		21,721		23,635
Related Allowance for Loan Losses	2,632		2,632		3,051
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	18,587	20,571	19,060	20,514
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized, Accrual Method	190	456	585	883
Consumer | Home Equity
Impaired Loans Information:
Impaired Financing Receivable, with Related Allowance, Recorded Investment	3,228		3,228		3,359
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	3,228		3,228		3,359
Related Allowance for Loan Losses	346		346		350
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	3,362	2,695	3,341	2,448
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized, Accrual Method	40	35	120	86
Consumer | Automobile
Impaired Loans Information:
Impaired Financing Receivable, with Related Allowance, Recorded Investment	17,621		17,621		17,117
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	17,621		17,621		17,117
Related Allowance for Loan Losses	244		244		296
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	17,624	16,008	17,537	15,881
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized, Accrual Method	297	293	890	832
Consumer | Other
Impaired Loans Information:
Impaired Financing Receivable, with Related Allowance, Recorded Investment	1,687		1,687		2,098
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	1,687		1,687		2,098
Related Allowance for Loan Losses	44		44		$ 57
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	1,746	2,826	1,895	2,800
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized, Accrual Method	$ 37	$ 62	$ 118	$ 170

Loans and Leases and the Allo_8

Loans and Leases and the Allowance for Loan and Lease Losses (Troubled Debt Restructuring & Narrative) (Details 6) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019USD ($)contract	Sep. 30, 2018USD ($)contract	Sep. 30, 2019USD ($)contract	Sep. 30, 2018USD ($)contract	Dec. 31, 2018USD ($)
Information related to loans modified as a TDR
Recorded Investment	$ 54,000		$ 54,000
Available Commitments to Lend Additional Funds on Loans Modified as TDR			$ 100		$ 200
Number of Contracts | contract	101	141	355	444
Recorded Investment (as of period end)	$ 1,827	$ 2,989	$ 9,783	$ 9,548
Increase in Allowance (as of period end)	$ 26	$ 116	$ 95	$ 285
Residential Mortgage | Maximum
Information related to loans modified as a TDR
Period of Time Loan Being Fully Amortized			40 years
Land Loan | Maximum
Information related to loans modified as a TDR
Period of Time Loan Being Fully Amortized			360 months
Extending Balloon Payments			5 years
Commercial
Information related to loans modified as a TDR
Number of Contracts | contract	1	1	6	8
Recorded Investment (as of period end)	$ 45	$ 233	$ 4,010	$ 1,450
Increase in Allowance (as of period end)	$ 0	$ 0	$ 14	$ 47
Commercial | Commercial and Industrial
Information related to loans modified as a TDR
Number of Contracts | contract	1	1	5	8
Recorded Investment (as of period end)	$ 45	$ 233	$ 244	$ 1,450
Increase in Allowance (as of period end)	$ 0	$ 0	$ 14	$ 47
Commercial | Commercial Mortgage
Information related to loans modified as a TDR
Number of Contracts | contract			1	0
Recorded Investment (as of period end)			$ 3,766	$ 0
Increase in Allowance (as of period end)			$ 0	$ 0
Consumer
Information related to loans modified as a TDR
Number of Contracts | contract	100	140	349	436
Recorded Investment (as of period end)	$ 1,782	$ 2,756	$ 5,773	$ 8,098
Increase in Allowance (as of period end)	$ 26	$ 116	$ 81	$ 238
Consumer | Residential Mortgage
Information related to loans modified as a TDR
Number of Contracts | contract	0	2	1	4
Recorded Investment (as of period end)	$ 0	$ 296	$ 57	$ 749
Increase in Allowance (as of period end)	$ 0	$ 5	$ 0	$ 35
Consumer | Home Equity
Information related to loans modified as a TDR
Number of Contracts | contract	0	2	2	5
Recorded Investment (as of period end)	$ 0	$ 434	$ 246	$ 971
Increase in Allowance (as of period end)	$ 0	$ 69	$ 0	$ 69
Consumer | Automobile
Information related to loans modified as a TDR
Number of Contracts | contract	86	87	271	254
Recorded Investment (as of period end)	$ 1,665	$ 1,700	$ 5,011	$ 5,196
Increase in Allowance (as of period end)	$ 23	$ 33	$ 69	$ 100
Consumer | Other
Information related to loans modified as a TDR
Number of Contracts | contract	14	49	75	173
Recorded Investment (as of period end)	$ 117	$ 326	$ 459	$ 1,182
Increase in Allowance (as of period end)	$ 3	$ 9	$ 12	$ 34

Loans and Leases and the Allo_9

Loans and Leases and the Allowance for Loan and Lease Losses (Troubled Debt Restructuring's that Defaulted During the Period) (Details 7) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019USD ($)contract	Sep. 30, 2018USD ($)contract	Sep. 30, 2019USD ($)contract	Sep. 30, 2018USD ($)contract
Information related to loans modified as a TDR
Number of Contracts, TDRs that Defaulted | contract	20	40	49	88
Recorded Investment (as of period ended), TDRs that Defaulted | $	$ 526	$ 440	$ 853	$ 996
Minimum
Information related to loans modified as a TDR
Default Period Past Due Following Modification of Loans in TDR (in days)			60 days
Commercial
Information related to loans modified as a TDR
Number of Contracts, TDRs that Defaulted | contract			1	0
Recorded Investment (as of period ended), TDRs that Defaulted | $			$ 55	$ 0
Commercial | Commercial and Industrial
Information related to loans modified as a TDR
Number of Contracts, TDRs that Defaulted | contract			1	0
Recorded Investment (as of period ended), TDRs that Defaulted | $			$ 55	$ 0
Consumer
Information related to loans modified as a TDR
Number of Contracts, TDRs that Defaulted | contract	20	40	48	88
Recorded Investment (as of period ended), TDRs that Defaulted | $	$ 526	$ 440	$ 798	$ 996
Consumer | Residential Mortgage
Information related to loans modified as a TDR
Number of Contracts, TDRs that Defaulted | contract	1	0	1	0
Recorded Investment (as of period ended), TDRs that Defaulted | $	$ 133	$ 0	$ 133	$ 0
Consumer | Home Equity
Information related to loans modified as a TDR
Number of Contracts, TDRs that Defaulted | contract	1	0	1	0
Recorded Investment (as of period ended), TDRs that Defaulted | $	$ 195	$ 0	$ 195	$ 0
Consumer | Automobile
Information related to loans modified as a TDR
Number of Contracts, TDRs that Defaulted | contract	9	12	22	32
Recorded Investment (as of period ended), TDRs that Defaulted | $	$ 126	$ 266	$ 326	$ 614
Consumer | Other
Information related to loans modified as a TDR
Number of Contracts, TDRs that Defaulted | contract	9	28	24	56
Recorded Investment (as of period ended), TDRs that Defaulted | $	$ 72	$ 174	$ 144	$ 382

Loans and Leases and the All_10

Loans and Leases and the Allowance for Loan and Lease Losses (Foreclosure Proceedings Narrative) (Details 8) $ in Millions	Sep. 30, 2019USD ($)
Loans and Leases and Allowance for Loan and Lease Losses [Abstract]
Consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure	$ 1.8

Mortgage Servicing Rights (Narr

Mortgage Servicing Rights (Narrative) (Details 1) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Dec. 31, 2018
Transfers and Servicing of Financial Assets [Abstract]
Residential mortgage loans serviced for third parties	$ 3,000		$ 3,000	$ 2,900
Servicing income, including late and ancillary fees	$ 1.8	$ 1.8	$ 5.4

Mortgage Servicing Rights (Fair

Mortgage Servicing Rights (Fair value method rollforward) (Details 2) - Mortgage Servicing Rights - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Mortgage servicing rights accounted for under the fair value measurement method [Rollforward]
Balance at Beginning of Period	$ 1,212	$ 1,366	$ 1,290	$ 1,454
Due to Payoffs	(38)	(39)	(116)	(127)
Total Changes in Fair Value of Mortgage Servicing Rights	(38)	(39)	(116)	(127)
Balance at End of Period	$ 1,174	$ 1,327	$ 1,174	$ 1,327

Mortgage Servicing Rights (Amor

Mortgage Servicing Rights (Amortization method rollforward) (Details 3) - Mortgage Servicing Rights - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Servicing Asset at Amortized Cost [Line Items]
Valuation Allowance	$ 28	$ 0	$ 28	$ 0	$ 10	$ 0	$ 0	$ 0
Mortgage Servicing Rights Accounted for Under the Amortization Method {Rollforward)
Balance at Beginning of Period	23,021	23,217	23,020	23,168
Servicing Rights that Resulted From Asset Transfers	1,263	562	2,788	1,957
Amortization	(1,032)	(643)	(2,546)	(1,989)
Valuation Allowance for Impairment of Recognized Servicing Assets, Additions (Deductions) for Expenses (Recoveries)	(18)	0	(28)	0
Balance at End of Period	23,234	23,136	23,234	23,136
Fair Value of Mortgage Servicing Rights Accounted for Under the Amortization Method
Beginning of Period	24,905	29,746	29,218	26,716
End of Period	$ 23,674	$ 30,063	$ 23,674	$ 30,063

Mortgage Servicing Rights (Key

Mortgage Servicing Rights (Key assumptions) (Details 4) - Mortgage Servicing Rights	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Key data and assumptions used in estimating the fair value of mortgage servicing rights
Weighted-Average Constant Prepayment Rate (as a percent)	11.81%	7.01%
Weighted-Average Life (in years)	5 years 9 months 14 days	7 years 10 months 20 days
Weighted-Average Note Rate (as a percent)	4.03%	4.06%
Weighted-Average Discount Rate (as a percent)	6.96%	9.59%

Mortgage Servicing Rights (Sens

Mortgage Servicing Rights (Sensitivity analysis) (Details 5) - Mortgage Servicing Rights - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Constant Prepayment Rate
Decrease in fair value from 25 basis points (“bps”) adverse change	$ (268)	$ (361)
Decrease in fair value from 50 bps adverse change	(529)	(716)
Discount Rate
Decrease in fair value from 25 bps adverse change	(231)	(325)
Decrease in fair value from 50 bps adverse change	$ (458)	$ (643)

Low Income Housing Tax Credit_3

Low Income Housing Tax Credit Partnerships (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Affordable Housing Tax Credit Investments, Unfunded Commitment [Abstract]
2019	$ 2,923			$ 2,923
2020	12,370			12,370
2021	44			44
2022	69			69
2023	45			45
Thereafter	1,417			1,417
Total Unfunded Commitments	16,868			16,868
Effective Yield Method
Tax credits and other tax benefits recognized	2,930	$ 3,380		8,789	$ 10,192
Amortization Expense in Provision for Income Taxes	1,891	2,078		5,674	6,233
Proportional Amortization Method
Tax credits and other tax benefits recognized	753	410		2,260	1,231
Amortization Expense in Provision for Income Taxes	645	$ 333		1,934	999
Net affordable housing tax credit investments and related unfunded commitments	$ 71,900			71,900		$ 73,700
Write down from impairment of LIHTC Investments				$ 0	$ 0
Low income housing investment partnerships basis adjustments, provision income tax expense			$ 2,000

Balance Sheet Offsetting (Repos

Balance Sheet Offsetting (Repos - by maturity date and collateral type) (Details 1) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	$ 604,299	$ 504,296
Debt Securities Issued by the U.S. Treasury and Government Agencies
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	314,890	315,463
Debt Securities Issued by States and Political Subdivisions
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	2,790	3,496
Mortgage-Backed Securities: Residential - Government Agencies
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	87,730	97,699
Mortgage-Backed Securities: Residential - U.S. Government-Sponsored Enterprises
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	198,889	87,638
Maturity Up To 90 Days [Member]
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	1,999	2,706
Maturity Up To 90 Days [Member] | Debt Securities Issued by the U.S. Treasury and Government Agencies
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	0	0
Maturity Up To 90 Days [Member] | Debt Securities Issued by States and Political Subdivisions
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	490	1,906
Maturity Up To 90 Days [Member] | Mortgage-Backed Securities: Residential - Government Agencies
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	1,509	800
Maturity Up To 90 Days [Member] | Mortgage-Backed Securities: Residential - U.S. Government-Sponsored Enterprises
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	0	0
Maturity 91 To 365 Days [Member]
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	2,300	1,590
Maturity 91 To 365 Days [Member] | Debt Securities Issued by the U.S. Treasury and Government Agencies
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	0	0
Maturity 91 To 365 Days [Member] | Debt Securities Issued by States and Political Subdivisions
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	2,300	1,590
Maturity 91 To 365 Days [Member] | Mortgage-Backed Securities: Residential - Government Agencies
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	0	0
Maturity 91 To 365 Days [Member] | Mortgage-Backed Securities: Residential - U.S. Government-Sponsored Enterprises
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	0	0
Maturity 1 To 3 Years [Member]
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	225,000	225,000
Maturity 1 To 3 Years [Member] | Debt Securities Issued by the U.S. Treasury and Government Agencies
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	198,303	198,442
Maturity 1 To 3 Years [Member] | Debt Securities Issued by States and Political Subdivisions
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	0	0
Maturity 1 To 3 Years [Member] | Mortgage-Backed Securities: Residential - Government Agencies
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	26,697	26,558
Maturity 1 To 3 Years [Member] | Mortgage-Backed Securities: Residential - U.S. Government-Sponsored Enterprises
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	0	0
Maturity After 3 Years [Member]
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	375,000	275,000
Maturity After 3 Years [Member] | Debt Securities Issued by the U.S. Treasury and Government Agencies
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	116,587	117,021
Maturity After 3 Years [Member] | Debt Securities Issued by States and Political Subdivisions
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	0	0
Maturity After 3 Years [Member] | Mortgage-Backed Securities: Residential - Government Agencies
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	59,524	70,341
Maturity After 3 Years [Member] | Mortgage-Backed Securities: Residential - U.S. Government-Sponsored Enterprises
Securities Sold Under Agreements to Repurchase
Securities Sold under Agreements to Repurchase	$ 198,889	$ 87,638

Balance Sheet Offsetting (Asset

Balance Sheet Offsetting (Assets and liabilities subject to MNA, or repurchase agreements) (Details 2) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Liabilities:
Repurchase Agreements, Gross Amounts of Recognized Liabilities	$ 604,299	$ 504,296
Repurchase Agreements, Gross Amounts Offset in the Statements of Condition	0	0
Repurchase Agreements, Net Amounts of Liabilities Presented in the Statements of Condition	604,299	504,296
Repurchase Agreements, Fair Value of Collateral Pledged	604,299	504,296
Securities Sold under Agreements to Repurchase, Net Amount Offset Against Collateral	0	0
Interest Rate Swap Agreements
Offsetting Assets and Liabilities [Line items]
Net liability positions, aggregate fair value	8,200	300
Institutional Counterparties | Interest Rate Swap Agreements
Assets:
Gross Amounts of Recognized Assets	92	7,572
Gross Amounts Offset in the Statements of Condition	0	0
Net Amounts of Assets Presented in the Statements of Condition	92	7,572
Netting Adjustments per Master Netting Arrangements	92	1,490
Gross Amounts Not Offset in the Statements of Condition - FV of collateral pledged	0	0
Derivative Assets, Net Amount	0	6,082
Liabilities:
Gross Amounts of Recognized Liabilities	8,258	1,490
Gross Amounts Offset in the Statements of Condition	0	0
Net Amounts of Liabilities Presented in the Statements of Condition	8,258	1,490
Derivative Liability, Netting Adjustments per Master Netting Arrangements	92	1,490
Derivative, Collateral, Right to Reclaim Securities	6,113	0
Derivative Liabilities, Net Amount	2,053	0
Private Institutions
Offsetting Assets and Liabilities [Line items]
Securities Sold under Agreements to Repurchase, Fair Value of Collateral	644,300	526,700
Liabilities:
Repurchase Agreements, Gross Amounts of Recognized Liabilities	600,000	500,000
Repurchase Agreements, Gross Amounts Offset in the Statements of Condition	0	0
Repurchase Agreements, Net Amounts of Liabilities Presented in the Statements of Condition	600,000	500,000
Repurchase Agreements, Fair Value of Collateral Pledged	600,000	500,000
Securities Sold under Agreements to Repurchase, Net Amount Offset Against Collateral	0	0
Government Entities
Offsetting Assets and Liabilities [Line items]
Securities Sold under Agreements to Repurchase, Fair Value of Collateral	5,800	6,800
Liabilities:
Repurchase Agreements, Gross Amounts of Recognized Liabilities	4,299	4,296
Repurchase Agreements, Gross Amounts Offset in the Statements of Condition	0	0
Repurchase Agreements, Net Amounts of Liabilities Presented in the Statements of Condition	4,299	4,296
Repurchase Agreements, Fair Value of Collateral Pledged	4,299	4,296
Securities Sold under Agreements to Repurchase, Net Amount Offset Against Collateral	$ 0	$ 0

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) (AOCI Components Pre Post & Tax Effect) (Details 1) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Other Comprehensive Income (Loss), Before Tax:
Net Unrealized Gains (Losses) Arising During the Period	$ 7,314			$ (8,086)			$ 38,077	$ (25,765)
(Gain) Loss on Sale							63
Amortization of Unrealized Holding (Gains) Losses on HTM Securities	39			476			804	1,712
Net Unrealized Gains (Losses) on Investment Securities	7,353			(7,610)			38,818	(24,053)
Amortization of Net Actuarial Losses (Gains)	406			437			1,218	1,309
Amortization of Prior Service Credit	(72)			(142)			(216)	(426)
Defined Benefit Plans, Net	334			295			1,002	883
Other Comprehensive Income (Loss)	7,687			(7,315)			39,820	(23,170)
Other Comprehensive Income (Loss), Tax Effect:
Net Unrealized Gains (Losses) Arising During the Period	1,938			(2,137)			10,090	(6,812)
(Gain) Loss on Sale, Tax							(17)
Amortization of Unrealized Holding (Gains) Losses on HTM Securities	10			126			212	453
Net Unrealized Gains (Losses) on Investment Securities	1,948			(2,011)			10,285	(6,359)
Amortization of Net Actuarial Losses (Gains)	108			115			323	346
Amortization of Prior Service Credit	(19)			(36)			(57)	(111)
Defined Benefit Plans, Net	89			79			266	235
Other Comprehensive Income (Loss)	2,037			(1,932)			10,551	(6,124)
Other Comprehensive Income (Loss), Net of Tax:
Net Unrealized Gains (Losses) Arising During the Period	5,376			(5,949)			27,987	(18,953)
(Gain) Loss on Sale, Net of Tax							46
Amortization of Unrealized Holding (Gains) Losses on HTM Securities	29			350			592	1,259
Net Unrealized Gains (Losses) on Investment Securities	5,405			(5,599)			28,533	(17,694)
Amortization of Net Actuarial Losses (Gains)	298			322			895	963
Amortization of Prior Service Credit	(53)			(106)			(159)	(315)
Defined Benefit Plans, Net	245			216			736	648
Total Other Comprehensive Income (Loss)	$ 5,650	$ 16,454	$ 7,165	$ (5,383)	$ (2,758)	$ (8,905)	$ 29,269	$ (17,046)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) (Change in AOCI Components net of tax) (Details 2) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at Beginning of Period	$ 1,285,948	$ 1,269,690	$ 1,268,200	$ 1,247,717	$ 1,241,193	$ 1,231,868	$ 1,268,200	$ 1,231,868
Total Other Comprehensive Income (Loss)	5,650	16,454	7,165	(5,383)	(2,758)	(8,905)	29,269	(17,046)
Reclassification of the Income Tax Effect of the Tax Reform from AOCI to RE						0
Balance at End of Period	1,291,490	1,285,948	1,269,690	1,253,327	1,247,717	1,241,193	1,291,490	1,253,327
Defined Benefit Plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at Beginning of Period	(35,519)		(36,010)	(33,252)		(27,715)	(36,010)	(27,715)
Other Comprehensive Income (Loss) Before Reclassifications	0			0			0	0
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, before Tax							0
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	245			216			736	648
Total Other Comprehensive Income (Loss)	245			216			736	648
Reclassification of the Income Tax Effect of the Tax Reform from AOCI to RE								(5,969)
Balance at End of Period	(35,274)	(35,519)		(33,036)	(33,252)		(35,274)	(33,036)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at Beginning of Period	(27,424)	(43,878)	(51,043)	(53,855)	(51,097)	(34,715)	(51,043)	(34,715)
Other Comprehensive Income (Loss) Before Reclassifications	5,376			(5,949)			27,987	(18,953)
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, before Tax							0
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	274			566			1,282	1,907
Total Other Comprehensive Income (Loss)	5,650	16,454	7,165	(5,383)	(2,758)	(8,905)	29,269	(17,046)
Reclassification of the Income Tax Effect of the Tax Reform from AOCI to RE						(7,477)		(7,477)
Balance at End of Period	(21,774)	(27,424)	(43,878)	(59,238)	(53,855)	(51,097)	(21,774)	(59,238)
Available-for-sale Securities | Unrealized Gains and Losses on Net Investment Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at Beginning of Period	8,859		(10,447)	(15,331)		(1,915)	(10,447)	(1,915)
Other Comprehensive Income (Loss) Before Reclassifications	5,376			(5,949)			27,987	(18,953)
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, before Tax							(3,259)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	0			0			(46)	0
Total Other Comprehensive Income (Loss)	5,376			(5,949)			24,682	(18,953)
Reclassification of the Income Tax Effect of the Tax Reform from AOCI to RE								(412)
Balance at End of Period	14,235	8,859		(21,280)	(15,331)		14,235	(21,280)
Held-to-maturity Securities | Unrealized Gains and Losses on Net Investment Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at Beginning of Period	(764)		$ (4,586)	(5,272)		$ (5,085)	(4,586)	(5,085)
Other Comprehensive Income (Loss) Before Reclassifications	0			0			0	0
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, before Tax							3,259
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	29			350			592	1,259
Total Other Comprehensive Income (Loss)	29			350			3,851	1,259
Reclassification of the Income Tax Effect of the Tax Reform from AOCI to RE								(1,096)
Balance at End of Period	$ (735)	$ (764)		$ (4,922)	$ (5,272)		$ (735)	$ (4,922)

Accumulated Other Comprehensi_5

Accumulated Other Comprehensive Income (Loss) (AOCI Reclass to IS) (Details 3) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Salaries and Benefits	$ (54,345)			$ (51,782)			$ (164,442)	$ (158,352)
Tax Benefit (Expense)	(14,752)			(13,138)			(44,315)	(36,365)
Net Income	52,052	$ 56,919	$ 58,799	56,933	$ 54,718	$ 54,040	167,770	165,691
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Net Income	(274)			(566)			(1,282)	(1,907)
Amortization of Unrealized Gains(Losses) of Investment Securities Transferred from AFS to HTM | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Interest Income	(39)			(476)			(804)	(1,712)
Tax Benefit (Expense)	10			126			212	453
Net Income	(29)			(350)			(592)	(1,259)
Sale of Investment Securities Available-for-Sale [Member] | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Tax Benefit (Expense)							(17)	0
Net Income							46	0
Available-for-sale Securities, Gross Realized Gain (Loss)							63	0
Amortization of Defined Benefit Pension Items | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Salaries and Benefits	(334)			(295)			(1,002)	(883)
Tax Benefit (Expense)	89			79			266	235
Net Income	(245)			(216)			(736)	(648)
Prior Service Credit | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Salaries and Benefits	72			142			216	426
Net Actuarial Losses | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Salaries and Benefits	$ (406)			$ (437)			$ (1,218)	$ (1,309)

Earnings Per Share (Details)

Earnings Per Share (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Reconciliation of Diluted Shares
Denominator for Basic Earnings Per Share (in shares)	40,190,508	41,620,776	40,554,036	41,846,080
Dilutive Effect of Equity Based Awards (in shares)	260,234	278,625	252,259	287,696
Denominator for Diluted Earnings Per Share (in shares)	40,450,742	41,899,401	40,806,295	42,133,776
Antidilutive Stock Options and Restricted Stock Outstanding (in shares)	0	0	2,399	0

Business Segments (Business Seg

Business Segments (Business Segments Financial Information and Narrative) (Details) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Mar. 31, 2019USD ($)	Sep. 30, 2018USD ($)	Jun. 30, 2018USD ($)	Mar. 31, 2018USD ($)	Sep. 30, 2019USD ($)atmbranch	Sep. 30, 2018USD ($)	Dec. 31, 2018USD ($)
Business segment financial information
Federal and State effective tax rate used for segment reporting							26.00%
Net Interest Income	$ 124,896			$ 122,927			$ 373,830	$ 362,379
Provision for Credit Losses	4,250			3,800			11,250	11,425
Net Interest Income After Provision for Credit Losses	120,646			119,127			362,580	350,954
Noninterest Income	46,507			41,482			135,636	126,815
Noninterest Expense	(100,349)			(90,538)			(286,131)	(275,713)
Income Before Provision for Income Taxes	66,804			70,071			212,085	202,056
Provision for Income Taxes	(14,752)			(13,138)			(44,315)	(36,365)
Net Income	52,052	$ 56,919	$ 58,799	56,933	$ 54,718	$ 54,040	167,770	165,691
Total Assets	17,672,140			16,991,734			$ 17,672,140	16,991,734	$ 17,143,974
Retail Banking
Business segment financial information
Number of branch locations through which products and services are delivered to customers | branch							67
Number of ATM's through which products and services are delivered to customers | atm							379
Net Interest Income	66,648			66,927			$ 200,019	197,007
Provision for Credit Losses	3,084			3,229			7,852	10,417
Net Interest Income After Provision for Credit Losses	63,564			63,698			192,167	186,590
Noninterest Income	22,964			19,814			65,305	58,665
Noninterest Expense	(59,358)			(51,806)			(163,968)	(158,344)
Income Before Provision for Income Taxes	27,170			31,706			93,504	86,911
Provision for Income Taxes	(6,547)			(7,943)			(22,883)	(21,707)
Net Income	20,623			23,763			70,621	65,204
Total Assets	6,668,902			6,246,126			6,668,902	6,246,126
Commercial Banking
Business segment financial information
Net Interest Income	46,791			46,240			139,784	133,148
Provision for Credit Losses	(130)			69			1,141	(276)
Net Interest Income After Provision for Credit Losses	46,921			46,171			138,643	133,424
Noninterest Income	8,739			6,241			22,738	17,395
Noninterest Expense	(21,330)			(20,242)			(63,545)	(60,432)
Income Before Provision for Income Taxes	34,330			32,170			97,836	90,387
Provision for Income Taxes	(8,560)			(7,218)			(22,507)	(20,782)
Net Income	25,770			24,952			75,329	69,605
Total Assets	4,145,717			3,873,454			4,145,717	3,873,454
Investment Services and Private Banking
Business segment financial information
Net Interest Income	9,641			10,574			29,685	30,987
Provision for Credit Losses	32			0			14	(60)
Net Interest Income After Provision for Credit Losses	9,609			10,574			29,671	31,047
Noninterest Income	13,663			13,526			41,767	41,941
Noninterest Expense	(15,840)			(15,657)			(49,200)	(48,264)
Income Before Provision for Income Taxes	7,432			8,443			22,238	24,724
Provision for Income Taxes	(1,959)			(2,226)			(5,862)	(6,518)
Net Income	5,473			6,217			16,376	18,206
Total Assets	324,388			340,793			324,388	340,793
Treasury and Other
Business segment financial information
Net Interest Income	1,816			(814)			4,342	1,237
Provision for Credit Losses	1,264			502			2,243	1,344
Net Interest Income After Provision for Credit Losses	552			(1,316)			2,099	(107)
Noninterest Income	1,141			1,901			5,826	8,814
Noninterest Expense	(3,821)			(2,833)			(9,418)	(8,673)
Income Before Provision for Income Taxes	(2,128)			(2,248)			(1,493)	34
Provision for Income Taxes	2,314			4,249			6,937	12,642
Net Income	186			2,001			5,444	12,676
Total Assets	$ 6,533,133			$ 6,531,361			$ 6,533,133	$ 6,531,361

Derivative Financial Instrume_3

Derivative Financial Instruments (Notional Amounts) (Details 1) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Interest Rate Lock Commitments
Derivative [Line Items]
Notional Amount	$ 110,702	$ 33,133
Fair Value	2,788	871
Forward Commitments
Derivative [Line Items]
Notional Amount	130,815	34,102
Fair Value	201	(352)
Receive Fixed / Pay Variable Swap
Derivative [Line Items]
Notional Amount	763,316	505,034
Fair Value	37,289	(2,537)
Pay Fixed / Receive Variable Swap
Derivative [Line Items]
Notional Amount	763,316	505,034
Fair Value	(8,166)	6,082
Foreign Exchange Contracts
Derivative [Line Items]
Notional Amount	72,683	55,663
Fair Value	(405)	793
Visa Conversion Rate Swap Agreement
Derivative [Line Items]
Notional Amount	104,816	80,746
Fair Value	$ (453)	$ 0

Pension Plans and Postretirem_3

Pension Plans and Postretirement Benefit Plan (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Pension Benefits
Net periodic benefit cost for pension plans and the postretirement benefit plan
Service Cost	$ 0	$ 0	$ 0	$ 0
Interest Cost	1,094	1,041	3,281	3,123
Expected Return on Plan Assets	(1,249)	(1,281)	(3,747)	(3,845)
Amortization of Prior Service Credit	0	0	0	0
Amortization of Net Actuarial Losses (Gains)	483	498	1,451	1,494
Net Periodic Benefit Cost	328	258	985	772
Employer Contributions	200		400
Estimated Future Employer Contributions in Current Fiscal Year	500		500
Postretirement Benefits
Net periodic benefit cost for pension plans and the postretirement benefit plan
Service Cost	118	114	353	344
Interest Cost	258	235	773	706
Expected Return on Plan Assets	0	0	0	0
Amortization of Prior Service Credit	(72)	(142)	(216)	(426)
Amortization of Net Actuarial Losses (Gains)	(77)	(61)	(233)	(185)
Net Periodic Benefit Cost	227	$ 146	677	$ 439
Employer Contributions	500		1,100
Estimated Future Employer Contributions in Current Fiscal Year	$ 1,500		$ 1,500

Derivative Financial Instrume_4

Derivative Financial Instruments (Assets and liabilities) (Details 2) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Derivative Financial Instruments Not Designated as Hedging Instruments
Asset Derivatives	$ 40,692	$ 14,604
Liability Derivatives	9,438	9,747
Interest Rate Lock Commitments
Derivative Financial Instruments Not Designated as Hedging Instruments
Asset Derivatives	2,788	877
Liability Derivatives	0	6
Forward Commitments
Derivative Financial Instruments Not Designated as Hedging Instruments
Asset Derivatives	391	4
Liability Derivatives	190	356
Interest Rate Swap Agreements
Derivative Financial Instruments Not Designated as Hedging Instruments
Asset Derivatives	37,472	12,915
Liability Derivatives	8,349	9,370
Foreign Exchange Contracts
Derivative Financial Instruments Not Designated as Hedging Instruments
Asset Derivatives	41	808
Liability Derivatives	446	15
Visa Conversion Rate Swap Agreement
Derivative Financial Instruments Not Designated as Hedging Instruments
Asset Derivatives	0	0
Liability Derivatives	$ 453	$ 0	$ 1,000

Derivative Financial Instrume_5

Derivative Financial Instruments (Net gains or losses) (Details 3) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Derivative Instruments, Gain (Loss)
Net gains (losses) recognized in the statements of income	$ 7,093	$ 2,175	$ 15,366	$ 6,306
Interest Rate Lock Commitments | Mortgage Banking Income
Derivative Instruments, Gain (Loss)
Net gains (losses) recognized in the statements of income	4,381	729	9,667	2,227
Forward Commitments | Mortgage Banking Income
Derivative Instruments, Gain (Loss)
Net gains (losses) recognized in the statements of income	(282)	207	(2,257)	1,131
Interest Rate Swap Agreements | Other Noninterest Income
Derivative Instruments, Gain (Loss)
Net gains (losses) recognized in the statements of income	2,967	558	5,863	1,308
Foreign Exchange Contracts | Other Noninterest Income
Derivative Instruments, Gain (Loss)
Net gains (losses) recognized in the statements of income	480	681	2,546	2,640
Visa Conversion Rate Swap Agreement | Gain (Loss) on Investments [Member]
Derivative Instruments, Gain (Loss)
Net gains (losses) recognized in the statements of income	$ (453)	$ 0	$ (453)	$ (1,000)

Derivative Financial Instrume_6

Derivative Financial Instruments (Narrative) (Details 4)	Sep. 27, 2019	Sep. 26, 2019	Jun. 28, 2018	Jun. 27, 2018	Sep. 30, 2019USD ($)	Dec. 31, 2018USD ($)	Jun. 30, 2018USD ($)
Derivative [Line Items]
Liability Derivatives					$ 9,438,000	$ 9,747,000
Visa Class B Restricted Securities
Derivative [Line Items]
Liability Derivatives					0
Visa Conversion Rate Swap Agreement
Derivative [Line Items]
Liability Derivatives					$ 453,000	$ 0	$ 1,000,000
Visa Class B Restricted Securities
Derivative [Line Items]
Conversion ratio	1.6228	1.6298	1.6298	1.6483	1.6228

Commitments, Contingencies, a_3

Commitments, Contingencies, and Guarantees (Credit Commitments) (Details 1) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Credit Commitments [Line Items]
Credit Commitments	$ 2,828,560	$ 2,717,840
Unfunded Commitments to Extend Credit
Credit Commitments [Line Items]
Credit Commitments	2,751,256	2,646,085
Standby Letters of Credit
Credit Commitments [Line Items]
Credit Commitments	63,871	62,344
Commercial Letters of Credit
Credit Commitments [Line Items]
Credit Commitments	$ 13,433	$ 9,411

Commitments, Contingencies, a_4

Commitments, Contingencies, and Guarantees (Narrative) (Details 2) $ in Millions	Oct. 16, 2019USD ($)	Sep. 30, 2019USD ($)Loan	Mar. 31, 2018USD ($)
Residential Mortgage
Representations and Warranties [Line Items]
Continuing Involvement with Transferred Financial Assets, Principal Amount Outstanding | $		$ 2,700
Number of Mortgage Loans Repurchased | Loan		2,000
Unpaid principle balance on mortgages repurchased | $		$ 0.6
Number of Mortgage Loans Delinquent Repurchased | Loan		1,000
Number of Mortgage Loans Repurchased, Pending | Loan		1
Unpaid principal balance of mortgage loans repurchased, Pending | $		$ 0.3
Number of Mortgage Loans Repurchased due to Loan Servicing Activities | Loan		0
Number of Mortgage Loans Repurchased due to Loan Servicing Activities, Pending | Loan		0
Current Residential Mortgage Loans Serviced for Third Parties as Percentage of Total		99.00%
Class Settlement | Settled Litigation
Representations and Warranties [Line Items]
Loss contingency accrual amount | $		$ 8	$ 2
Subsequent Event | Class Settlement | Settled Litigation
Representations and Warranties [Line Items]
Litigation settlement amount | $	$ 8

Fair Value of Assets and Liab_3

Fair Value of Assets and Liabilities (Narrative) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Derivative [Line Items]
Liability Derivatives	$ 9,438	$ 9,747
Visa Conversion Rate Swap Agreement
Derivative [Line Items]
Liability Derivatives	$ 453	$ 0	$ 1,000

Fair Value of Assets and Liab_4

Fair Value of Assets and Liabilities (Fair value on recurring basis) (Details 1) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Assets:
Available-for-Sale: Fair Value	$ 2,594,394	$ 2,007,942
Loans Held for Sale	36,720	10,987
Debt Securities Issued by States and Political Subdivisions
Assets:
Available-for-Sale: Fair Value	53,982	563,996
Debt Securities Issued by Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	21,895	56
Debt Securities Issued by Corporations
Assets:
Available-for-Sale: Fair Value	348,441	223,140
Mortgage-Backed Securities
Assets:
Available-for-Sale: Fair Value	1,934,391	828,349
Residential - Government Agencies
Assets:
Available-for-Sale: Fair Value	1,228,637	190,442
Residential - U.S. Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	537,336	578,527
Commercial - Government Agencies
Assets:
Available-for-Sale: Fair Value	168,418	59,380
Fair Value, Measurements, Recurring
Assets:
Available-for-Sale: Fair Value	2,594,394	2,007,942
Loans Held for Sale	36,720	10,987
Mortgage Servicing Rights	1,174	1,290
Other Assets	37,865	31,871
Derivatives	40,692	14,604
Total Assets Measured at Fair Value on a Recurring Basis	2,710,845	2,066,694
Liabilites:
Derivatives	9,438	9,747
Total Liabilities Measured at Fair Value on a Recurring Basis	9,438	9,747
Fair Value, Measurements, Recurring | Debt Securities Issued by the U.S. Treasury and Government Agencies
Assets:
Available-for-Sale: Fair Value	235,685	392,401
Fair Value, Measurements, Recurring | Debt Securities Issued by States and Political Subdivisions
Assets:
Available-for-Sale: Fair Value	53,982	563,996
Fair Value, Measurements, Recurring | Debt Securities Issued by Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	21,895	56
Fair Value, Measurements, Recurring | Debt Securities Issued by Corporations
Assets:
Available-for-Sale: Fair Value	348,441	223,140
Fair Value, Measurements, Recurring | Mortgage-Backed Securities
Assets:
Available-for-Sale: Fair Value	1,934,391	828,349
Fair Value, Measurements, Recurring | Residential - Government Agencies
Assets:
Available-for-Sale: Fair Value	1,228,637	190,442
Fair Value, Measurements, Recurring | Residential - U.S. Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	537,336	578,527
Fair Value, Measurements, Recurring | Commercial - Government Agencies
Assets:
Available-for-Sale: Fair Value	168,418	59,380
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1)
Assets:
Available-for-Sale: Fair Value	1,005	972
Loans Held for Sale	0	0
Mortgage Servicing Rights	0	0
Other Assets	37,865	31,871
Derivatives	0	0
Total Assets Measured at Fair Value on a Recurring Basis	38,870	32,843
Liabilites:
Derivatives	0	0
Total Liabilities Measured at Fair Value on a Recurring Basis	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) | Debt Securities Issued by the U.S. Treasury and Government Agencies
Assets:
Available-for-Sale: Fair Value	1,005	972
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) | Debt Securities Issued by States and Political Subdivisions
Assets:
Available-for-Sale: Fair Value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) | Debt Securities Issued by Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) | Debt Securities Issued by Corporations
Assets:
Available-for-Sale: Fair Value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) | Mortgage-Backed Securities
Assets:
Available-for-Sale: Fair Value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) | Residential - Government Agencies
Assets:
Available-for-Sale: Fair Value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) | Residential - U.S. Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) | Commercial - Government Agencies
Assets:
Available-for-Sale: Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets:
Available-for-Sale: Fair Value	2,593,389	2,006,970
Loans Held for Sale	36,720	10,987
Mortgage Servicing Rights	0	0
Other Assets	0	0
Derivatives	432	812
Total Assets Measured at Fair Value on a Recurring Basis	2,630,541	2,018,769
Liabilites:
Derivatives	1,089	371
Total Liabilities Measured at Fair Value on a Recurring Basis	1,089	371
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Debt Securities Issued by the U.S. Treasury and Government Agencies
Assets:
Available-for-Sale: Fair Value	234,680	391,429
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Debt Securities Issued by States and Political Subdivisions
Assets:
Available-for-Sale: Fair Value	53,982	563,996
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Debt Securities Issued by Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	21,895	56
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Debt Securities Issued by Corporations
Assets:
Available-for-Sale: Fair Value	348,441	223,140
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Mortgage-Backed Securities
Assets:
Available-for-Sale: Fair Value	1,934,391	828,349
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Residential - Government Agencies
Assets:
Available-for-Sale: Fair Value	1,228,637	190,442
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Residential - U.S. Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	537,336	578,527
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Commercial - Government Agencies
Assets:
Available-for-Sale: Fair Value	168,418	59,380
Fair Value, Measurements, Recurring | Significant Other Unobservable Inputs (Level 3)
Assets:
Available-for-Sale: Fair Value	0	0
Loans Held for Sale	0	0
Mortgage Servicing Rights	1,174	1,290
Other Assets	0	0
Derivatives	40,260	13,792
Total Assets Measured at Fair Value on a Recurring Basis	41,434	15,082
Liabilites:
Derivatives	8,349	9,376
Total Liabilities Measured at Fair Value on a Recurring Basis	8,349	9,376
Fair Value, Measurements, Recurring | Significant Other Unobservable Inputs (Level 3) | Debt Securities Issued by the U.S. Treasury and Government Agencies
Assets:
Available-for-Sale: Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Other Unobservable Inputs (Level 3) | Debt Securities Issued by States and Political Subdivisions
Assets:
Available-for-Sale: Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Other Unobservable Inputs (Level 3) | Debt Securities Issued by Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Other Unobservable Inputs (Level 3) | Debt Securities Issued by Corporations
Assets:
Available-for-Sale: Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Other Unobservable Inputs (Level 3) | Mortgage-Backed Securities
Assets:
Available-for-Sale: Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Other Unobservable Inputs (Level 3) | Residential - Government Agencies
Assets:
Available-for-Sale: Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Other Unobservable Inputs (Level 3) | Residential - U.S. Government-Sponsored Enterprises
Assets:
Available-for-Sale: Fair Value	0	0
Fair Value, Measurements, Recurring | Significant Other Unobservable Inputs (Level 3) | Commercial - Government Agencies
Assets:
Available-for-Sale: Fair Value	$ 0	$ 0

Fair Value of Assets and Liab_5

Fair Value of Assets and Liabilities (FV on recurring basis-Level 3 rollforward) (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Fair Value, Mortgage Servicing Rights Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Fair Value, Mortgage Servicing Rights, Beginning Balance	$ 1,212	$ 1,366	$ 1,290	$ 1,454
Fair Value, Mortgage Servicing Rights, Realized and Unrealized Net Gains (Losses) Included in Net Income	(38)	(39)	(116)	(127)
Fair Value, Mortgage Servicing Rights, Ending Balance	1,174	1,327	1,174	1,327
Fair Value, Mortgage Service Rights, Total Unrealized Net Gains (Losses) Included in Net Income Related to Assets Still Held	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Fair Value, Net Derivative Assets and Liabilities, Beginning Balance	19,956	391	4,416	894
Fair Value, Net Derivative Assets and Liabilities, Realized and Unrealized Net Gains (Losses) Included in Net Income	4,360	730	9,602	2,234
Fair Value, Net Derivative Assets and Liabilities, Transfers to Loans Held for Sale	(3,736)	(1,012)	(7,750)	(2,591)
Variation margin payments for swap liabilities	11,331	(293)	25,643	(721)
Fair Value, Net Derivative Assets and Liabilities, Ending Balance	31,911	(184)	31,911	(184)
Fair Value, Net Derivative Assets and Liabilities,Total Unrealized Net Gains (Losses) Included in Net Income Related to Assets Still Held	$ 31,911	$ (184)	$ 31,911	$ (184)

Fair Value of Assets and Liab_6

Fair Value of Assets and Liabilities (FV on recurring or nonrecurring basis-level 3 inputs) (Details 3) $ in Thousands	Sep. 30, 2019USD ($)	Dec. 31, 2018USD ($)
Interest Rate Lock Commitments | Pricing Model
Level 3 Assets and Liabilities, Fair Value and Fair Value Unobservable Inputs
Interest Rate Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net	$ 2,788	$ 871
Interest Rate Swap Agreements | Discounted Cash Flow
Level 3 Assets and Liabilities, Fair Value and Fair Value Unobservable Inputs
Interest Rate Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net	29,123	3,545
Mortgage Servicing Rights | Discounted Cash Flow
Level 3 Assets and Liabilities, Fair Value and Fair Value Unobservable Inputs
Mortgage Servicing Rights, at Fair Value	$ 24,848	$ 30,508
Significant Other Unobservable Inputs (Level 3) | Interest Rate Lock Commitments | Pricing Model | Weighted Average Closing Ratio (as a percent)
Level 3 Assets and Liabilities, Fair Value and Fair Value Unobservable Inputs
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Fair Value Inputs	0.9187	0.8900
Significant Other Unobservable Inputs (Level 3) | Interest Rate Swap Agreements | Discounted Cash Flow | Weighted Average Credit Factor (as a percent)
Level 3 Assets and Liabilities, Fair Value and Fair Value Unobservable Inputs
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Fair Value Inputs	0.0020	0.0006
Significant Other Unobservable Inputs (Level 3) | Mortgage Servicing Rights | Discounted Cash Flow | Weighted Average Constant Prepayment Rate (as a percent)
Level 3 Assets and Liabilities, Fair Value and Fair Value Unobservable Inputs
Mortgage Servicing Rights, Fair Value Inputs	0.1181	0.0701
Significant Other Unobservable Inputs (Level 3) | Weighted Average Discount Rate (as a percent) | Discounted Cash Flow | Weighted Average Discount Rate (as a percent)
Level 3 Assets and Liabilities, Fair Value and Fair Value Unobservable Inputs
Mortgage Servicing Rights, Fair Value Inputs	0.0696	0.0959

Fair Value of Assets and Liab_7

Fair Value of Assets and Liabilities (Fair value on a nonrecurring basis) (Details 4) - Significant Other Unobservable Inputs (Level 3) $ in Thousands	Sep. 30, 2019USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net Carrying Amount	$ 23,674
Valuation Allowance	(28)
Other Assets Equipment Held for Sale	0
Valuation Allowance Equipment Held for Sale	$ 217

Fair Value of Assets and Liab_8

Fair Value of Assets and Liabilities (FV option) (Details 5) - Residential mortgage loans held for sale - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Fair Value Option
Aggregate Fair Value	$ 36,720	$ 10,987
Aggregate Unpaid Principal	36,039	10,656
Aggregate Fair Value Less Aggregate Unpaid Principal	$ 681	$ 331

Fair Value of Assets and Liab_9

Fair Value of Assets and Liabilities (Financial instruments not recorded at FV on recurring basis) (Details 6) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financial Instruments - Assets
Held-to-Maturity: Fair Value	$ 2,972,273	$ 3,413,994
Carrying Amount
Financial Instruments - Assets
Held-to-Maturity: Fair Value	2,946,910	3,482,092
Loans	10,514,438	10,084,527
Financial Instruments - Liabilities
Time Deposits	1,806,083	1,745,522
Securities Sold Under Agreements to Repurchase	604,299	504,296
Other Debt	100,000	125,000
Fair Value
Financial Instruments - Assets
Held-to-Maturity: Fair Value	2,972,273	3,413,994
Loans	10,784,711	10,008,417
Financial Instruments - Liabilities
Time Deposits	1,805,230	1,734,447
Securities Sold Under Agreements to Repurchase	633,599	504,288
Other Debt	100,627	124,559
Fair Value | Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial Instruments - Assets
Held-to-Maturity: Fair Value	355,442	352,216
Loans	0	0
Financial Instruments - Liabilities
Time Deposits	0	0
Securities Sold Under Agreements to Repurchase	0	0
Other Debt	0	0
Fair Value | Significant Other Observable Inputs (Level 2)
Financial Instruments - Assets
Held-to-Maturity: Fair Value	2,616,831	3,061,778
Loans	0	0
Financial Instruments - Liabilities
Time Deposits	1,805,230	1,734,447
Securities Sold Under Agreements to Repurchase	633,599	504,288
Other Debt	100,627	124,559
Fair Value | Significant Other Unobservable Inputs (Level 3)
Financial Instruments - Assets
Held-to-Maturity: Fair Value	0	0
Loans	10,784,711	10,008,417
Financial Instruments - Liabilities
Time Deposits		0
Securities Sold Under Agreements to Repurchase		0
Other Debt		$ 0

Revenue Recognition (Details)

Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Service Charges on Deposit Accounts	$ 7,592	$ 7,255	$ 22,239	$ 21,249
Fees, Exchange, and Other Service Charges	14,900	14,173	43,360	42,906
Annuity and Insurance	1,278	1,360	5,662	4,413
Other	6,765	5,056	18,756	16,478
Noninterest Income	46,507	41,482	135,636	126,815
Accounting Standards Update 2014-09
Disaggregation of Revenue [Line Items]
Noninterest Income	46,507	41,482	135,636	126,815
Accounting Standards Update 2014-09 | Noninterest Income In Scope of Topic 606
Disaggregation of Revenue [Line Items]
Trust and Asset Management	10,930	10,782	33,076	33,319
Service Charges on Deposit Accounts	3,268	3,194	9,912	9,982
Fees, Exchange, and Other Service Charges	11,705	11,506	34,859	34,556
Annuity and Insurance	1,251	1,311	5,567	4,251
Other	2,224	2,366	7,200	7,176
Noninterest Income	29,378	29,159	90,614	89,284
Accounting Standards Update 2014-09 | Noninterest Income Out of Scope of Topic 606
Disaggregation of Revenue [Line Items]
Noninterest Income	$ 17,129	$ 12,323	$ 45,022	$ 37,531

Leases (Lease Assets and Lease

Leases (Lease Assets and Lease Liabilities) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018	Jan. 01, 2018
Lease Right-of-Use Assets
Operating lease right-of-use assets	$ 101,005	$ 106,514	$ 0	$ 0
Finance lease right-of-use assets	2,394
Total Lease Right-of-Use Assets	103,399
Lease Liabilities
Operating lease liabilities	108,264	$ 113,394	$ 0	$ 0
Finance lease liabilities	10,585
Total Lease Liabilities	$ 118,849

Leases (Lessee, Finance Lease,

Leases (Lessee, Finance Lease, Incremental Borrowing Rates) (Details)	Sep. 30, 2019
Weighted-average Remaining Lease Term [Abstract]
Operating leases	17 years 1 month 6 days
Finance leases	33 years 3 months 18 days
Weighted-average Discount Rate [Abstract]
Operating leases	3.67%
Finance leases	7.04%

Leases (Lease Cost and other Le

Leases (Lease Cost and other Lease Information) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Lease, Cost [Abstract]
Operating lease cost	$ 3,136	$ 9,495
Variable lease cost	998	2,592
Short-term lease cost	153	370
Interest on lease liabilities	187	561
Amortization of right-of-use assets	18	54
Sublease income	(2,122)	(6,383)
Net lease cost	2,370	6,689
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	3,259	9,584
Operating cash flows from finance leases	187	561
Financing cash flows from finance leases	20	58
Right-of-use assets obtained in exchange for new operating lease liabilities	392	2,117
Right-of-use assets obtained in exchange for new finance lease liabilities	$ 0	$ 0

Leases (Lease Maturity Schedule

Leases (Lease Maturity Schedule) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018	Jan. 01, 2018
Finance Leases
September 30, 2020	$ 825
September 30, 2021	825
September 30, 2022	825
September 30, 2023	825
September 30, 2024	825
Thereafter	23,311
Total Future Minimum Lease Payments	27,436
Amounts Representing Interest	(16,851)
Present Value of Net Future Minimum Lease Payments, Finance Leases	10,585
Operating Leases
September 30, 2020	12,059
September 30, 2021	11,338
September 30, 2022	10,700
September 30, 2023	9,824
September 30, 2024	8,558
Thereafter	102,033
Total Future Minimum Lease Payments	154,512
Amounts Representing Interest	(46,248)
Present Value of Net Future Minimum Lease Payments, Operating Leases	$ 108,264	$ 113,394	$ 0	$ 0