Washington Trust Bancorp (WASH) 10-Q 1 Aug 19 2019 Q2 Quarterly report Financial data

Cover Page

Cover Page - shares	6 Months Ended
	Jun. 30, 2019	Jul. 30, 2019
Cover page.
Entity Address, Address Line One	23 Broad Street
Entity Address, City or Town	Westerly,
Entity Address, State or Province	RI
Entity Incorporation, State or Country Code	RI
Document Transition Report	false
Document Quarterly Report	true
Entity Registrant Name	Washington Trust Bancorp Inc
Entity Central Index Key	0000737468
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Entity File Number	001-32991
City Area Code	401
Local Phone Number	348-1200
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Emerging Growth Company	false
Entity Small Business	false
Title of 12(g) Security	COMMON STOCK, $.0625 PAR VALUE PER SHARE
Trading Symbol	WASH
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		17,337,072
Entity Tax Identification Number	05-0404671
Entity Address, Postal Zip Code	02891

CONSOLIDATED BALANCE SHEETS (Un

CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands		Jun. 30, 2019		Dec. 31, 2018
Assets:
Cash and due from banks		$ 115,904		$ 89,923
Short-term investments		3,910		3,552
Mortgage loans held for sale		39,996		20,996
Securities:
Available for sale debt securities, at fair value		969,168		927,810
Held to maturity debt securities, at amortized cost		0		10,415
Total securities		969,168		938,225
Federal Home Loan Bank stock, at cost		49,759		46,068
Loans:
Total loans	[1]	3,730,339		3,680,360
Less allowance for loan losses		27,398		27,072
Net loans		3,702,941		3,653,288
Premises and equipment, net		29,302		29,005
Operating lease right-of-use assets		28,174		0
Investment in bank-owned life insurance		81,351		80,463
Goodwill		63,909		63,909
Identifiable intangible assets, net		7,684		8,162
Other assets		97,574		77,175
Total assets		5,189,672		5,010,766
Liabilities:
Noninterest-bearing deposits		587,326		603,216
Interest-bearing deposits		2,917,296		2,920,832
Total deposits		3,504,622		3,524,048
Federal Home Loan Bank advances		1,060,960		950,722
Junior subordinated debentures		22,681		22,681
Operating lease liabilities		30,210	[2]	0
Other liabilities		86,994		65,131
Total liabilities		4,705,467		4,562,582
Commitments and contingencies (Note 18)
Shareholders' Equity:
Common stock		1,083		1,081
Paid-in capital		121,115		119,888
Retained earnings		373,873		355,524
Unrealized losses on held to maturity securities, net of tax		(11,866)		(28,309)
Total shareholders' equity		484,205		448,184
Total liabilities and shareholders’ equity		$ 5,189,672		$ 5,010,766
[1]	Includes net unamortized loan origination costs of $5.3 million and $4.7 million , respectively, at June 30, 2019 and December 31, 2018 and net unamortized premiums on purchased loans of $609 thousand and $703 thousand , respectively, at June 30, 2019 and December 31, 2018 .
[2]	Includes short-term operating lease liabilities of $2.5 million .

CONSOLIDATED BALANCE SHEETS (_2

CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Held to maturity debt securities, fair value	$ 0	$ 10,316
Common stock, par value	$ 0.0625	$ 0.0625
Common stock, shares authorized	60,000,000	60,000,000
Common stock, shares issued	17,335,869	17,302,037
Common stock, shares outstanding	17,335,869	17,302,037

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Interest income:
Interest and fees on loans	$ 42,138	$ 36,788	$ 83,882	$ 71,140
Interest and Fee Income, Loans Held-for-sale, Mortgages	288	313	468	539
Taxable interest on securities	7,006	5,358	14,232	10,476
Nontaxable interest on securities	8	20	17	43
Dividends on Federal Home Loan Bank stock	720	550	1,415	1,066
Other interest income	399	257	739	462
Total interest and dividend income	50,559	43,286	100,753	83,726
Interest expense:
Deposits	9,469	5,254	18,165	9,676
Federal Home Loan Bank advances	6,980	4,707	13,641	8,690
Junior subordinated debentures	252	214	505	397
Total interest expense	16,701	10,175	32,311	18,763
Net interest income	33,858	33,111	68,442	64,963
Provision for loan losses	525	400	1,175	400
Net interest income after provision for loan losses	33,333	32,711	67,267	64,563
Noninterest income:
Wealth management revenues	9,549	9,602	18,801	19,875
Mortgage banking revenues	3,640	2,941	6,286	5,779
Card interchange fees	1,018	961	2,015	1,808
Service charges on deposit accounts	929	903	1,804	1,766
Loan related derivative income	746	668	1,470	809
Income from bank-owned life insurance	566	537	1,215	1,052
Net realized losses on securities	(80)	0	(80)	0
Other income	385	381	609	647
Total noninterest income	16,753	15,993	32,120	31,736
Noninterest expense:
Salaries and employee benefits	18,436	17,304	36,055	35,076
Outsourced services	2,518	2,350	5,124	4,223
Net occupancy	1,904	1,930	3,902	3,932
Equipment	1,028	1,069	2,039	2,249
Legal, audit and professional fees	664	555	1,198	1,281
FDIC deposit insurance costs	540	422	969	826
Advertising and promotion	525	329	764	506
Amortization of intangibles	239	247	478	495
Other expenses	2,297	2,082	4,586	4,830
Total noninterest expense	28,151	26,288	55,115	53,418
Income before income taxes	21,935	22,416	44,272	42,881
Income tax expense	4,662	4,742	9,504	8,996
Net income	17,273	17,674	34,768	33,885
Net income applicable to common shareholders	$ 17,238	$ 17,636	$ 34,699	$ 33,809
Weighted average common shares outstanding - basic	17,330	17,272	17,317	17,253
Weighted average common shares outstanding - diluted	17,405	17,387	17,403	17,384
Per share information:
Basic earnings per common share	$ 0.99	$ 1.02	$ 2	$ 1.96
Diluted earnings per common share	0.99	1.01	1.99	1.94
Cash dividends declared per share	$ 0.51	$ 0.43	$ 0.98	$ 0.86

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 17,273	$ 17,674	$ 34,768	$ 33,885
Other comprehensive income (loss), net of tax:
Net change in fair value of available for sale debt securities	6,033	(3,112)	17,054	(13,526)
Net change in fair value of cash flow hedges	(622)	365	(1,064)	1,254
Net change in defined benefit plan obligations	226	360	453	720
Total other comprehensive income (loss), net of tax	5,637	(2,387)	16,443	(11,552)
Total comprehensive income	$ 22,910	$ 15,287	$ 51,211	$ 22,333

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Common Stock, Shares Outstanding, Beginning Balance at Dec. 31, 2017		17,227,000
Shareholders' Equity, Beginning Balance at Dec. 31, 2017	$ 413,284	$ 1,077	$ 117,961	$ 317,756	$ (23,510)
Net income	33,885			33,885
Total other comprehensive income (loss), net of tax	(11,552)				(11,552)
Cash dividends declared	(14,971)			(14,971)
Share-based compensation	1,319		1,319
Exercise of stock options and issuance of other compensation-related equity awards, shares		51,000
Exercise of stock options and issuance of other compensation-related equity awards, value	(394)	$ 3	(397)
Common Stock, Shares Outstanding, Ending Balance at Jun. 30, 2018		17,278,000
Shareholders' Equity, Ending Balance at Jun. 30, 2018	421,571	$ 1,080	118,883	336,670	(35,062)
Common Stock, Shares Outstanding, Beginning Balance at Mar. 31, 2018		17,262,000
Shareholders' Equity, Beginning Balance at Mar. 31, 2018	413,081	$ 1,079	118,172	326,505	(32,675)
Net income	17,674			17,674
Total other comprehensive income (loss), net of tax	(2,387)				(2,387)
Cash dividends declared	(7,509)			(7,509)
Share-based compensation	649		649
Exercise of stock options and issuance of other compensation-related equity awards, shares		16,000
Exercise of stock options and issuance of other compensation-related equity awards, value	63	$ 1	62
Common Stock, Shares Outstanding, Ending Balance at Jun. 30, 2018		17,278,000
Shareholders' Equity, Ending Balance at Jun. 30, 2018	$ 421,571	$ 1,080	118,883	336,670	(35,062)
Common Stock, Shares Outstanding, Beginning Balance at Dec. 31, 2018	17,302,037	17,302,000
Shareholders' Equity, Beginning Balance at Dec. 31, 2018	$ 448,184	$ 1,081	119,888	355,524	(28,309)
Net income	34,768			34,768
Total other comprehensive income (loss), net of tax	16,443				16,443
Cash dividends declared	(17,141)			(17,141)
Share-based compensation	1,503		1,503
Exercise of stock options and issuance of other compensation-related equity awards, shares		34,000
Exercise of stock options and issuance of other compensation-related equity awards, value	$ (274)	$ 2	(276)
Common Stock, Shares Outstanding, Ending Balance at Jun. 30, 2019	17,335,869	17,336,000
Shareholders' Equity, Ending Balance at Jun. 30, 2019	$ 484,205	$ 1,083	121,115	373,873	(11,866)
Common Stock, Shares Outstanding, Beginning Balance at Mar. 31, 2019		17,305,000
Shareholders' Equity, Beginning Balance at Mar. 31, 2019	469,843	$ 1,082	120,743	365,521	(17,503)
Net income	17,273			17,273
Total other comprehensive income (loss), net of tax	5,637				5,637
Cash dividends declared	(8,921)			(8,921)
Share-based compensation	764		764
Exercise of stock options and issuance of other compensation-related equity awards, shares		31,000
Exercise of stock options and issuance of other compensation-related equity awards, value	$ (391)	$ 1	(392)
Common Stock, Shares Outstanding, Ending Balance at Jun. 30, 2019	17,335,869	17,336,000
Shareholders' Equity, Ending Balance at Jun. 30, 2019	$ 484,205	$ 1,083	$ 121,115	$ 373,873	$ (11,866)

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income	$ 34,768	$ 33,885
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	1,175	400
Depreciation of premises and equipment	1,672	1,630
Net amortization of premium and discount	1,894	1,386
Amortization of intangibles	478	495
Share-based compensation	1,503	1,319
Tax benefit from stock option exercises and other equity awards	172	352
Income from bank-owned life insurance	(1,215)	(1,052)
Net gains on loan sales and commissions on loans originated for others, including fair value adjustments	(5,998)	(5,465)
Net realized losses on securities	(80)	0
Proceeds from sales of loans	199,897	182,964
Loans originated for sale	(213,247)	(188,185)
(Increase) decrease in operating lease right-of-use assets	748	0
Increase (decrease) in operating lease liabilities	(643)	0
(Increase) decrease in other assets	(26,368)	(16,777)
Increase (decrease) in other liabilities	23,781	11,815
Net cash provided by (used in) operating activities	18,697	22,767
Cash flows from investing activities:
Purchases of mortgage-backed securities available for sale	(72,262)	(61,619)
Purchases of other investment securities available for sale	(10,507)	(1,064)
Proceeds from sale of other investment securities available for sale	9,920	0
Maturities and principal payments of mortgage-backed securities available for sale	51,590	41,270
Maturities and principal payments of other investment securities available for sale	11,045	6,795
Maturities and principal payments of mortgage-backed securities held to maturity	0	1,077
Remittance (purchases) of Federal Home Loan Bank stock	(3,691)	(5,764)
Net (increase) decrease in loans	(50,729)	(115,986)
Purchases of loans	(161)	(1,676)
Purchases of premises and equipment	(1,971)	(1,675)
Purchases of bank-owned life insurance	0	5,000
Proceeds from surrender of bank-owned life insurance	326	0
Net cash provided by (used in) investing activities	(66,440)	(143,642)
Cash flows from financing activities:
Net increase (decrease) in deposits	(19,426)	78,904
Proceeds from Federal Home Loan Bank advances	1,022,000	1,135,000
Repayment of Federal Home Loan Bank advances	(911,762)	(1,025,303)
Payment of contingent consideration liability	0	(1,217)
Net proceeds from stock option exercises and issuance of other equity awards	(274)	(394)
Cash dividends paid	(16,456)	(14,346)
Net cash provided by (used in) financing activities	74,082	172,644
Net increase (decrease) in cash and cash equivalents	26,339	51,769
Cash and cash equivalents at beginning of period	93,475	82,923
Cash and cash equivalents at end of period	119,814	134,692
Noncash Investing and Financing Activities:
Loans charged off	922	793
Loans transferred to property acquired through foreclosure or repossession	0	3,074
Operating lease right-of-use assets	28,923	0
Operating lease liabilities	30,853	0
Fair value of debt securities transferred from held-to-maturity to available for sale	10,316	0
Supplemental Disclosures:
Interest payments	30,341	17,576
Income tax payments	$ 9,786	$ 8,570

Basis of Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
General Information	Basis of Presentation Washington Trust Bancorp, Inc. (the “Bancorp”) is a publicly-owned registered bank holding company that has elected to be a financial holding company. The Bancorp’s subsidiaries include The Washington Trust Company, of Westerly (the “Bank”), a Rhode Island chartered commercial bank founded in 1800, and Weston Securities Corporation (“WSC”). Through its subsidiaries, the Bancorp offers a complete product line of financial services, including commercial, residential and consumer lending, retail and commercial deposit products, and wealth management services through its offices in Rhode Island, eastern Massachusetts and Connecticut; its automated teller machines (“ATMs”); telephone banking; mobile banking and its internet website (www.washtrust.com). The Unaudited Consolidated Financial Statements include the accounts of the Bancorp and its subsidiaries (collectively the “Corporation” or “Washington Trust”). All intercompany balances and transactions have been eliminated. Certain previously reported amounts have been reclassified to conform to current year’s presentation. The Bancorp also owns the common stock of two capital trusts, which have issued trust preferred securities. These capital trusts are variable interest entities in which the Bancorp is not the primary beneficiary and, therefore, are not consolidated. The capital trust’s only assets are junior subordinated debentures issued by the Bancorp, which were acquired by the capital trusts using the proceeds from the issuance of the trust preferred securities and common stock. The Bancorp’s equity interest in the capital trusts, classified in other assets, and the junior subordinated debentures are included in the Unaudited Consolidated Balance Sheets. Interest expense on the junior subordinated debentures is included in the Unaudited Consolidated Statements of Income. The accounting and reporting policies of the Corporation conform to accounting principles generally accepted in the United States of America (“GAAP”) and to general practices of the banking industry. In preparing the financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheet and revenues and expenses for the period. Actual results could differ from those estimates. The Unaudited Consolidated Financial Statements of the Corporation presented herein have been prepared pursuant to the rules of the Securities and Exchange Commission (“SEC”) for quarterly reports on Form 10-Q and do not include all of the information and note disclosures required by GAAP. In the opinion of management, all adjustments (consisting of normal recurring adjustments) and disclosures considered necessary for the fair presentation of the accompanying Unaudited Consolidated Financial Statements have been included. Interim results are not necessarily indicative of the results of the entire year. The accompanying Unaudited Consolidated Financial Statements should be read in conjunction with the Audited Consolidated Financial Statements and notes thereto included in the Annual Report on Form 10-K for the fiscal year ended December 31, 2018 .

Recently Issued Accounting Pron

Recently Issued Accounting Pronouncements	6 Months Ended
	Jun. 30, 2019
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements Accounting Standards Adopted in 2019 Leases - Topic 842 Accounting Standards Update No. 2016-02, “Leases” (“ASU 2016-02”), was issued in February 2016 and provides revised guidance related to the accounting and reporting of leases. ASU 2016-02 requires lessees to recognize most leases on the balance sheet. The recognition, measurement and presentation of expenses and cash flows arising from a lease by a lessee depends on its classification as a finance or operating lease. ASU 2016-02 requires a modified retrospective transition, with a package of practical expedients that entities may elect to apply. In January 2018, Accounting Standards Update No. 2018-01, “Leases (Topic 842): Land Easement Practical Expedient for Transition to Topic 842” was issued to address concerns about the costs and complexity of complying with the transition provisions of ASU 2016-02. In July 2018, Accounting Standards Update No. 2018-10, “Codification Improvements to Topic 842, Leases” was issued to provide more detailed guidance and additional clarification for implementing ASU 2016-02. Also in July 2018, Accounting Standards Update No. 2018-11, “Targeted Improvements” (“ASU 2018-11”) was issued and allows for an optional transition method in which the provisions of Topic 842 would be applied upon the adoption date and would not have to be retroactively applied to the earliest reporting period presented in the consolidated financial statements. The Corporation used this optional transition method for the adoption of Topic 842. In December 2018, Accounting Standards Update No. 2018-20, “Leases (Topic 842) Narrow-Scope Improvement for Lessors” was issued to address lessors’ concerns about sales taxes and other similar taxes collected from lessees, certain lessor costs, and recognition of variable payments for contracts with lease and non-lease components. These ASUs were effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2018. Management assembled a project team to address the changes pursuant to Topic 842. The project team identified and reviewed all lease agreements in scope of Topic 842. The Corporation rents premises used in business operations under non-cancelable operating leases, which as of December 31, 2018 were not reflected in its Consolidated Balance Sheets. The Corporation has no finance leases. The Corporation adopted Topic 842 “Leases” effective January 1, 2019 and has applied the guidance to all operating leases within the scope of Topic 842 at that date. The Corporation elected to adopt the package of practical expedients, which among other things, does not require reassessment of lease classification. The Corporation recognized $28.9 million in operating lease right-of-use-assets, $30.9 million in operating lease liabilities, a reduction in rent-related liabilities of $2.9 million , a reduction of net deferred tax assets of $222 thousand and a cumulative effect adjustment (net of taxes) that increased beginning retained earnings by $722 thousand in the Consolidated Balance Sheets. The cumulative effect adjustment represented the recognition of unamortized deferred gains associated with two leases. There was no change to the timing in recognition of operating lease rent expense on the Corporation’s consolidated financial statements associated with our leases. In March 2019, Accounting Standards Update No. 2019-01, “Leases (Topic 842) Codification Improvements” (“ASU 2019-01”) was issued to address lessors’ concerns about determining fair value of underlying leased assets and presentation issues in the statement of cash flows for sales-type and direct financing leases. ASU 2019-01 also clarified for both lessees and lessors that transition disclosures related to Topic 250 were not required for annual periods are also not required for interim periods. ASU 2019-01 was effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2019, with early adoption permitted. The Corporation early adopted this ASU 2019-01 effective January 1, 2019 and it did not have a material impact on the Corporation’s consolidated financial statements. Derivatives and Hedging - Topic 815 Accounting Standards Update No. 2017-12, “Targeted Improvements to Accounting for Hedging Activities” (“ASU 2017-12”), was issued in August 2017 to better align financial reporting for hedging activities with the economic objectives of those activities. ASU 2017-12 was effective for fiscal years beginning after December 15, 2018, with early adoption, including adoption in an interim period, permitted. In addition, ASU 2017-12 also permitted the reclassification of eligible securities from the held-to-maturity classification to the available for sale classification. The Corporation adopted the provisions of ASU 2017-12 on January 1, 2019 using a modified retrospective transition method. As permitted by ASU 2017-12, qualifying debt securities classified as held to maturity with an amortized cost of $10.4 million and a fair value of $10.3 million were reclassified to available for sale upon the adoption date. An unrealized loss of $75 thousand (net of taxes) was recognized in the accumulated other comprehensive income component of shareholders’ equity at the date of adoption. The adoption of ASU 2017-12 did not have a material impact on the Corporation’s consolidated financial statements. Accounting Standards Update No. 2018-16, “Inclusion of the Secured Overnight Financing Rate (SOFR) Overnight Index Swap (OIS) Rate as a Benchmark Interest Rate for Hedge Accounting Purposes” (“ASU 2018-16”), was issued in October 2018 to permit the use of the Overnight Index Swap rate based on the Secured Overnight Financing Rate as a U.S. benchmark interest rate for hedge accounting purposes under Topic 815 in addition to existing benchmark interest rates that are currently used for hedge accounting. ASU 2018-16 was effective for fiscal years beginning after December 15, 2018, and interim periods with those fiscal years. The provisions required prospective application for qualifying new or re-designated hedging relationships entered into on or after the date of adoption. The Corporation adopted the provisions of ASU 2018-16 on January 1, 2019 and it did not have a material impact on the Corporation’s consolidated financial statements. Accounting Standards Pending Adoption Financial Instruments - Credit Losses - Topic 326 Accounting Standards Update No. 2016-13, “Financial Instruments - Credit Losses” (“ASU 2016-13”), was issued in June 2016. ASU 2016-13 requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts and requires enhanced disclosures related to the significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an organization’s portfolio. In addition, ASU 2016-13 amends the accounting for credit losses on available for sale debt securities and purchased financial assets with credit deterioration. ASU 2016-13 provides for a modified retrospective transition, resulting in a cumulative-effect adjustment to equity as of the beginning of the period in which the guidance is effective, except for debt securities for which an other-than-temporary impairment has previously been recognized. For these debt securities, a prospective transition approach will be adopted in order to maintain the same amortized cost prior to and subsequent to the effective date of ASU 2016-13. This ASU is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2019, with early adoption permitted in 2019. The Corporation will adopt ASU 2016-03 on January 1, 2020 and is currently evaluating the effect that this ASU will have on the consolidated financial statements and disclosures. In April 2019, Accounting Standards Update No. 2019-04, “Codification Improvements to Topic 326 Financial Instruments - Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments” (“ASU 2019-04”) was issued to provide additional clarification on the scope and disclosure requirements of Topic 326. ASU 2019-04 includes provisions related to accounting policy elections that can be made by the entity related to accrued interest receivable and expected prepayments on financial assets, the inclusion of recoveries in estimating the allowance for credit losses and consideration of contract extension and renewals when determining the contractual term. This ASU also provides clarification on the tabular vintage disclosures related to line-of-credit arrangements that convert term loans. In May 2019, Accounting Standards Update No. 2019-05, “Financial Instruments - Credit Losses (Topic 326); Targeted Transition Relief” (“ASU 2019-05”) was issued to allow an entity to make an irrevocable fair value option election on instruments within the scope of Topic 326 that are measured at amortized cost, except for held-to-maturity debt securities. This election can be applied on an instrument-by-instrument basis upon the adoption of Topic 326. The effective dates of ASU 2019-04 and ASU 2019-05 are the same as the effective date of ASU 2016-13. To prepare for the adoption of ASU 2016-13 and related updates, the Corporation has assembled a cross-functional project team that meets regularly to address the additional data requirements necessary, to determine the approach for implementation and to identify new internal controls over enhanced accounting processes that will be put into place for estimating the allowance for credit losses. This has included assessing the adequacy of existing loan and loss data, as well as validating models for default and loss estimates. The new models will include additional assumptions used to calculate credit losses over the estimated life of the financial assets and will include the impact of forecasted economic conditions. The Corporation will continue the validation of models, the development of accounting policies and internal controls and the execution of “trial” runs of its Topic 326 compliant methodology throughout 2019. Fair Value Measurement - Topic 820 Accounting Standards Update No. 2018-13, “Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement” (“ASU 2018-13”), was issued in August 2018 to modify the disclosure requirements related to fair value. ASU 2018-13 is effective for fiscal years beginning after December 15, 2019, with early adoption permitted, including adoption in an interim period. Certain provisions under ASU 2018-13 require prospective application, while other provisions require retrospective application to all periods presented in the consolidated financial statements upon adoption. The adoption of ASU 2018-13 is not expected to have a material impact on the Corporation’s consolidated financial statements. Compensation - Retirement Benefits - Topic 715 Accounting Standards Update No. 2018-14, “Disclosure Framework - Changes to the Disclosure Requirements for Defined Benefit Plans” (“ASU 2018-14”), was issued in August 2018 to modify the disclosure requirements associated with defined benefit pension plans and other postretirement plans. ASU 2018-14 is effective for fiscal years ending after December 15, 2020, with early adoption permitted. The provisions under ASU 2018-14 are required to be applied retrospectively. The adoption of ASU 2018-14 is not expected to have a material impact on the Corporation’s consolidated financial statements. Intangibles - Goodwill and Other - Internal-Use Software - Topic 350 Accounting Standards Update No. 2018-15, “Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract” (“ASU 2018-15”), was issued in August 2018 to align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with those requirements that currently exist in GAAP for capitalizing implementation costs incurred to develop or obtain internal-use software. Implementation costs would either be capitalized or expensed as incurred depending on the project stage. All costs in the preliminary and post-implementation project stages are expensed as incurred, while certain costs within the application development stage are capitalized. The provisions under ASU 2018-15 can either be applied retrospectively or prospectively. ASU 2018-15 is effective for fiscal years beginning after December 15, 2019, with early adoption permitted, including adoption in an interim period. The adoption of ASU 2018-15 is not expected to have a material impact on the Corporation’s consolidated financial statements.

Cash and Due from Banks

Cash and Due from Banks	6 Months Ended
	Jun. 30, 2019
Cash and Cash Equivalents [Abstract]
Cash and Due from Banks	Cash and Due from Banks The Bank maintains certain average reserve balances to meet the requirements of the Board of Governors of the Federal Reserve System (“FRB”). Some or all of these reserve requirements may be satisfied with vault cash. Reserve balances am ounted to $25.5 million at June 30, 2019 and $21.6 million at December 31, 2018 and were included in cash and due from banks in the Unaudited Consolidated Balance Sheets. As of June 30, 2019 and December 31, 2018 , cash and due from banks included interest-bearing deposits in other banks of $61.7 million and $33.7 million , respectively.

Securities

Securities	6 Months Ended
	Jun. 30, 2019
Investments, Debt and Equity Securities [Abstract]
Securities	Securities The following tables present the amortized cost, gross unrealized holding gains, gross unrealized holding losses and fair value of securities by major security type and class of security: (Dollars in thousands) June 30, 2019 Amortized Cost Unrealized Gains Unrealized Losses Fair Value Available for Sale Debt Securities: Obligations of U.S. government-sponsored enterprises $236,726 $1,005 ($304 ) $237,427 Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 704,940 6,722 (4,482 ) 707,180 Obligations of states and political subdivisions 90 — — 90 Individual name issuer trust preferred debt securities 13,315 — (1,014 ) 12,301 Corporate bonds 13,713 25 (1,568 ) 12,170 Total available for sale debt securities $968,784 $7,752 ($7,368 ) $969,168 Total securities $968,784 $7,752 ($7,368 ) $969,168 (Dollars in thousands) December 31, 2018 Amortized Cost Unrealized Gains Unrealized Losses Fair Value Available for Sale Debt Securities: Obligations of U.S. government-sponsored enterprises $246,708 $442 ($4,467 ) $242,683 Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 675,368 1,943 (16,518 ) 660,793 Obligations of states and political subdivisions 935 2 — 937 Individual name issuer trust preferred debt securities 13,307 — (1,535 ) 11,772 Corporate bonds 13,402 — (1,777 ) 11,625 Total available for sale debt securities $949,720 $2,387 ($24,297 ) $927,810 Held to Maturity Debt Securities: Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises $10,415 $— ($99 ) $10,316 Total held to maturity debt securities $10,415 $— ($99 ) $10,316 Total securities $960,135 $2,387 ($24,396 ) $938,126 As discussed in Note 2 , on January 1, 2019, the Corporation adopted ASU 2017-12. As permitted by ASU 2017-12, qualifying debt securities classified as held to maturity with an amortized cost of $10.4 million and a fair value of $10.3 million were reclassified to available for sale upon the adoption date. An unrealized loss of $75 thousand (net of taxes) was recognized in the accumulated other comprehensive income component of shareholders’ equity at the date of adoption. As of June 30, 2019 and December 31, 2018 , debt securities with a fair value of $451.5 million and $439.7 million , respectively, were pledged as collateral for FHLB borrowings, potential borrowings with the FRB, certain public deposits and for other purposes. See Note 7 for additional disclosure on FHLB borrowings. The schedule of maturities of available for sale debt securities is presented below. Mortgage-backed securities are included based on weighted average maturities, adjusted for anticipated prepayments. All other debt securities are included based on contractual maturities. Actual maturities may differ from amounts presented because certain issuers have the right to call or prepay obligations with or without call or prepayment penalties. (Dollars in thousands) Available for Sale June 30, 2019 Amortized Cost Fair Value Due in one year or less $106,685 $106,963 Due after one year to five years 361,981 362,982 Due after five years to ten years 334,575 334,065 Due after ten years 165,543 165,158 Total debt securities $968,784 $969,168 Included in the above table are debt securities with an amortized cost balance of $262.5 million and a fair value of $260.6 million at June 30, 2019 that are callable at the discretion of the issuers. Final maturities of the callable securities range from 3 months to 18 years, with call features ranging from 1 month to 4 years. Other-Than-Temporary Impairment Assessment Management assesses whether the decline in fair value of investment securities is other-than-temporary on a regular basis. Unrealized losses on debt securities may occur from current market conditions, increases in interest rates since the time of purchase, a structural change in an investment, volatility of earnings of a specific issuer, or deterioration in credit quality of the issuer. Management evaluates impairments in value both qualitatively and quantitatively to assess whether they are other-than-temporary. The following tables summarize temporarily impaired securities, segregated by length of time the securities have been in a continuous unrealized loss position: (Dollars in thousands) Less than 12 Months 12 Months or Longer Total June 30, 2019 # Fair Unrealized # Fair Value Unrealized Losses # Fair Value Unrealized Losses Obligations of U.S. government-sponsored enterprises — $— $— 5 $60,697 ($304 ) 5 $60,697 ($304 ) Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises — — — 35 295,954 (4,482 ) 35 295,954 (4,482 ) Individual name issuer trust preferred debt securities — — — 5 12,301 (1,014 ) 5 12,301 (1,014 ) Corporate bonds — — — 4 10,432 (1,568 ) 4 10,432 (1,568 ) Total temporarily impaired securities — $— $— 49 $379,384 ($7,368 ) 49 $379,384 ($7,368 ) (Dollars in thousands) Less than 12 Months 12 Months or Longer Total December 31, 2018 # Fair Value Unrealized Losses # Fair Value Unrealized Losses # Fair Value Unrealized Losses Obligations of U.S. government-sponsored enterprises — $— $— 16 $157,032 ($4,467 ) 16 $157,032 ($4,467 ) Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 10 47,060 (439 ) 51 438,701 (16,178 ) 61 485,761 (16,617 ) Individual name issuer trust preferred debt securities — — — 5 11,772 (1,535 ) 5 11,772 (1,535 ) Corporate bonds 3 1,198 (9 ) 5 10,427 (1,768 ) 8 11,625 (1,777 ) Total temporarily impaired securities 13 $48,258 ($448 ) 77 $617,932 ($23,948 ) 90 $666,190 ($24,396 ) Further deterioration in credit quality of the underlying issuers of the securities, deterioration in the condition of the financial services industry, worsening of the current economic environment, or additional declines in real estate values, among other things, may further affect the fair value of these securities and increase the potential that certain unrealized losses be designated as other-than-temporary in future periods, and the Corporation may incur write-downs. Obligations of U.S. Government Agency and U.S. Government-Sponsored Enterprise Securities, including Mortgage-Backed Securities The gross unrealized losses on U.S. government agency and U.S. government-sponsored debt securities, including mortgage-backed securities, were primarily attributable to relative changes in interest rates since the time of purchase. The contractual cash flows for these securities are guaranteed by U.S. government agencies and U.S. government-sponsored enterprises. Management believes that the unrealized losses on these debt security holdings are a function of changes in investment spreads and interest rate movements and not changes in credit quality. Management expects to recover the entire amortized cost basis of these securities. Furthermore, the Corporation does not intend to sell these securities and it is not more-likely-than-not that the Corporation will be required to sell these securities before recovery of their cost basis, which may be maturity. Therefore, management does not consider these investments to be other-than-temporarily impaired at June 30, 2019 . Individual Name Issuer Trust Preferred Debt Securities Included in debt securities in an unrealized loss position at June 30, 2019 were five trust preferred securities issued by four individual companies in the banking sector. Management believes the unrealized losses on these holdings were attributable to the general widening of spreads for this category of debt securities issued by financial services companies since the time these securities were purchased. Based on the information available through the filing date of this report, all individual name issuer trust preferred debt securities held in our portfolio continue to accrue interest and make payments as expected with no payment deferrals or defaults on the part of the issuers. As of June 30, 2019 , individual name issuer trust preferred debt securities with an amortized cost of $6.1 million and unrealized losses of $518 thousand were rated below investment grade by Standard & Poors, Inc. (“S&P”). Management reviewed the collectibility of these securities taking into consideration such factors as the financial condition of the issuers, reported regulatory capital ratios of the issuers, credit ratings, including ratings in effect as of the reporting period date as well as credit rating changes between the reporting period date and the filing date of this report, and other information. We noted no additional downgrades to below investment grade between June 30, 2019 and the filing date of this report. Based on this review, management concluded that it expects to recover the entire amortized cost basis of these securities. Furthermore, the Corporation does not intend to sell these securities and it is not more-likely-than-not that the Corporation will be required to sell these securities before recovery of their cost basis, which may be maturity. Therefore, management does not consider these investments to be other-than-temporarily impaired at June 30, 2019 . Corporate Bonds At June 30, 2019 , the Corporation had four corporate bond holdings with unrealized losses totaling $1.6 million . These investment grade corporate bonds were issued by large corporations, primarily in the financial services industry. Management believes the unrealized losses on these bonds are primarily attributable to changes in the investment spreads and interest rates and not changes in the credit quality of the issuers of the debt securities. Management expects to recover the entire amortized cost basis of these securities. Furthermore, the Corporation does not intend to sell these securities and it is not more-likely-than-not that the Corporation will be required to sell these securities before recovery of their cost basis, which may be maturity. Therefore, management does not consider these investments to be other-than-temporarily impaired at June 30, 2019 . The following table summarizes amounts relating to sales of securities: (Dollars in thousands) Three Months Six Months For the periods ended June 30, 2019 2018 2019 2018 Proceeds from sales $9,920 $— $9,920 $— Gross realized gains $— $— $— $— Gross realized losses (80 ) — (80 ) — Net realized losses on securities ($80 ) $— ($80 ) $—

Loans

Loans	6 Months Ended
	Jun. 30, 2019
Receivables [Abstract]
Loans	Loans The following is a summary of loans: (Dollars in thousands) June 30, December 31, 2018 Commercial: Commercial real estate (1) $1,482,836 $1,392,408 Commercial & industrial (2) 583,873 620,704 Total commercial 2,066,709 2,013,112 Residential Real Estate: Residential real estate (3) 1,352,113 1,360,387 Consumer: Home equity 288,078 280,626 Other (4) 23,439 26,235 Total consumer 311,517 306,861 Total loans (5) $3,730,339 $3,680,360 (1) Consists of commercial mortgages primarily secured by income-producing property, as well as construction and development loans. Construction and development loans are made to businesses for land development or the on-site construction of industrial, commercial, or residential buildings. (2) Consists of loans to businesses and individuals, a substantial portion of which are fully or partially collateralized by real estate. (3) Consists of mortgage and homeowner construction loans secured by one- to four-family residential properties. (4) Consists of loans to individuals secured by general aviation aircraft and other personal installment loans. (5) Includes net unamortized loan origination costs of $5.3 million and $4.7 million , respectively, at June 30, 2019 and December 31, 2018 and net unamortized premiums on purchased loans of $609 thousand and $703 thousand , respectively, at June 30, 2019 and December 31, 2018 . As of both June 30, 2019 and December 31, 2018 , loans amounting to $2.0 billion were pledged as collateral to the FHLB under a blanket pledge agreement and to the FRB for the discount window. See Note 7 for additional disclosure regarding borrowings. Past Due Loans Past due status is based on the contractual payment terms of the loan. The following tables present an age analysis of past due loans, segregated by class of loans: (Dollars in thousands) Days Past Due June 30, 2019 30-59 60-89 Over 90 Total Past Due Current Total Loans Commercial: Commercial real estate $2,744 $— $926 $3,670 $1,479,166 $1,482,836 Commercial & industrial 1 — — 1 583,872 583,873 Total commercial 2,745 — 926 3,671 2,063,038 2,066,709 Residential Real Estate: Residential real estate 4,006 2,758 4,473 11,237 1,340,876 1,352,113 Consumer: Home equity 1,763 351 790 2,904 285,174 288,078 Other 13 1 88 102 23,337 23,439 Total consumer 1,776 352 878 3,006 308,511 311,517 Total loans $8,527 $3,110 $6,277 $17,914 $3,712,425 $3,730,339 (Dollars in thousands) Days Past Due December 31, 2018 30-59 60-89 Over 90 Total Past Due Current Total Loans Commercial: Commercial real estate $155 $925 $— $1,080 $1,391,328 $1,392,408 Commercial & industrial — — — — 620,704 620,704 Total commercial 155 925 — 1,080 2,012,032 2,013,112 Residential Real Estate: Residential real estate 6,318 2,693 1,509 10,520 1,349,867 1,360,387 Consumer: Home equity 1,281 156 552 1,989 278,637 280,626 Other 33 — — 33 26,202 26,235 Total consumer 1,314 156 552 2,022 304,839 306,861 Total loans $7,787 $3,774 $2,061 $13,622 $3,666,738 $3,680,360 Included in past due loans at both June 30, 2019 and December 31, 2018 were nonaccrual loans of $8.6 million . All loans 90 days or more past due at June 30, 2019 and December 31, 2018 were classified as nonaccrual. Impaired Loans Impaired loans include nonaccrual loans and loans restructured in a troubled debt restructuring. The Corporation identifies loss allocations for impaired loans on an individual loan basis. The following is a summary of impaired loans: (Dollars in thousands) Recorded Investment (1) Unpaid Principal Related Allowance Jun 30, Dec 31, Jun 30, Dec 31, Jun 30, Dec 31, No Related Allowance Recorded Commercial: Commercial real estate $926 $925 $926 $926 $— $— Commercial & industrial — 4,681 — 4,732 — — Total commercial 926 5,606 926 5,658 — — Residential Real Estate: Residential real estate 9,825 9,347 10,662 9,695 — — Consumer: Home equity 1,224 1,360 1,224 1,360 — — Other 88 — 88 — — — Total consumer 1,312 1,360 1,312 1,360 — — Subtotal 12,063 16,313 12,900 16,713 — — With Related Allowance Recorded Commercial: Commercial real estate $— $— $— $— $— $— Commercial & industrial — 52 — 73 — — Total commercial — 52 — 73 — — Residential Real Estate: Residential real estate 1,145 364 1,171 390 97 100 Consumer: Home equity 21 85 21 85 20 24 Other 19 22 19 22 2 3 Total consumer 40 107 40 107 22 27 Subtotal 1,185 523 1,211 570 119 127 Total impaired loans $13,248 $16,836 $14,111 $17,283 $119 $127 Total: Commercial $926 $5,658 $926 $5,731 $— $— Residential real estate 10,970 9,711 11,833 10,085 97 100 Consumer 1,352 1,467 1,352 1,467 22 27 Total impaired loans $13,248 $16,836 $14,111 $17,283 $119 $127 (1) The recorded investment in impaired loans consists of unpaid principal balance, net of charge-offs, interest payments received applied to principal and unamortized deferred loan origination fees and costs. For accruing impaired loans (troubled debt restructurings for which management has concluded that the collectibility of the loan is not in doubt), the recorded investment also includes accrued interest. The following tables present the average recorded investment balance of impaired loans and interest income recognized on impaired loans segregated by loan class. (Dollars in thousands) Average Recorded Investment Interest Income Recognized Three months ended June 30, 2019 2018 2019 2018 Commercial: Commercial real estate $926 $— $— $— Commercial & industrial 3,868 5,983 49 73 Total commercial 4,794 5,983 49 73 Residential Real Estate: Residential real estate 10,728 10,017 107 85 Consumer: Home equity 1,332 1,036 13 10 Other 35 88 — 2 Total consumer 1,367 1,124 13 12 Totals $16,889 $17,124 $169 $170 (Dollars in thousands) Average Recorded Investment Interest Income Recognized Six months ended June 30, 2019 2018 2019 2018 Commercial: Commercial real estate $951 $2,039 $1 $— Commercial & industrial 4,276 5,738 103 139 Total commercial 5,227 7,777 104 139 Residential Real Estate: Residential real estate 10,441 9,934 222 197 Consumer: Home equity 1,406 853 27 19 Other 28 116 — 5 Total consumer 1,434 969 27 24 Totals $17,102 $18,680 $353 $360 Nonaccrual Loans Loans, with the exception of certain well-secured loans that are in the process of collection, are placed on nonaccrual status and interest recognition is suspended when such loans are 90 days or more overdue with respect to principal and/or interest, or sooner if considered appropriate by management. Well-secured loans are permitted to remain on accrual status provided that full collection of principal and interest is assured and the loan is in the process of collection. Loans are also placed on nonaccrual status when, in the opinion of management, full collection of principal and interest is doubtful. When loans are placed on nonaccrual status, interest previously accrued but not collected is reversed against current period income. Subsequent interest payments received on nonaccrual loans are applied to the outstanding principal balance of the loan or recognized as interest income depending on management’s assessment of the ultimate collectability of the loan. Loans are removed from nonaccrual status when they have been current as to principal and interest for a period of time, the borrower has demonstrated an ability to comply with repayment terms, and when, in management’s opinion, the loans are considered to be fully collectible. The following is a summary of nonaccrual loans, segregated by class of loans: (Dollars in thousands) Jun 30, Dec 31, Commercial: Commercial real estate $926 $925 Commercial & industrial — — Total commercial 926 925 Residential Real Estate: Residential real estate 10,610 9,346 Consumer: Home equity 1,243 1,436 Other 88 — Total consumer 1,331 1,436 Total nonaccrual loans $12,867 $11,707 Accruing loans 90 days or more past due $— $— As of June 30, 2019 and December 31, 2018 , loans secured by one- to four-family residential property amounting to $3.5 million and $761 thousand , respectively, were in process of foreclosure. Nonaccrual loans of $4.3 million and $3.1 million , respectively, were current as to the payment of principal and interest at June 30, 2019 and December 31, 2018 . There were no significant commitments to lend additional funds to borrowers whose loans were on nonaccrual status at June 30, 2019 . Troubled Debt Restructurings Loans are considered to be troubled debt restructurings when the Corporation has granted concessions to a borrower due to the borrower’s financial condition that it otherwise would not have considered. These concessions may include modifications of the terms of the debt such as deferral of payments, extension of maturity, reduction of principal balance, reduction of the stated interest rate other than normal market rate adjustments, or a combination of these concessions. Debt may be bifurcated with separate terms for each tranche of the restructured debt. Restructuring of a loan in lieu of aggressively enforcing the collection of the loan may benefit the Corporation by increasing the ultimate probability of collection. Restructured loans are classified as accruing or non-accruing based on management’s assessment of the collectability of the loan. Loans which are already on nonaccrual status at the time of the restructuring generally remain on nonaccrual status for approximately six months before management considers such loans for return to accruing status. Accruing restructured loans are placed into nonaccrual status if and when the borrower fails to comply with the restructured terms and management deems it unlikely that the borrower will return to a status of compliance in the near term. Troubled debt restructurings are reported as such for at least one year from the date of the restructuring. In years after the restructuring, troubled debt restructured loans are removed from this classification if the restructuring did not involve a below-market rate concession and the loan is not deemed to be impaired based on the terms specified in the restructuring agreement. The recorded investment in troubled debt restructurings consists of unpaid principal balance, net of charge-offs and unamortized deferred loan origination fees and costs, at the time of the restructuring. For accruing troubled debt restructured loans, the recorded investment also includes accrued interest. The recorded investment in troubled debt restructurings was $882 thousand and $5.6 million , respectively, at June 30, 2019 and December 31, 2018 . The allowance for loan losses included specific reserves for these troubled debt restructurings of $100 thousand and $103 thousand , respectively, at June 30, 2019 and December 31, 2018 . For the three and six months ended June 30, 2019 , there were no loans modified as a troubled debt restructuring. For the three months ended June 30, 2018 , there were no loans modified as a troubled debt restructuring. For the six months ended June 30, 2018 , there was one loan modified as a troubled debt restructuring with a pre-modification and post-modification recorded investment of $608 thousand . This troubled debt restructuring included a combination of concessions pertaining to maturity and interest only payment terms. For the three and six months ended June 30, 2019 and 2018 , there were no payment defaults on troubled debt restructured loans modified within the previous 12 months. As of June 30, 2019 , there were no significant commitments to lend additional funds to borrowers whose loans had been restructured. Credit Quality Indicators Commercial The Corporation utilizes an internal rating system to assign a risk to each of its commercial loans. Loans are rated on a scale of 1 to 10. This scale can be assigned to three broad categories including “pass” for ratings 1 through 6, “special mention” for 7-rated loans, and “classified” for loans rated 8, 9 or 10. The loan rating system takes into consideration parameters including the borrower’s financial condition, the borrower’s performance with respect to loan terms, the adequacy of collateral, the adequacy of guarantees and other credit quality characteristics. For non-impaired loans, the Corporation takes the risk rating into consideration along with other credit attributes in the establishment of an appropriate allowance for loan losses. See Note 6 for additional information. A description of the commercial loan categories is as follows: Pass - Loans with acceptable credit quality, defined as ranging from superior or very strong to a status of lesser stature. Superior or very strong credit quality is characterized by a high degree of cash collateralization or strong balance sheet liquidity. Lesser stature loans have an acceptable level of credit quality but exhibit some weakness in various credit metrics such as collateral adequacy, cash flow, secondary sources of repayment, or performance inconsistency or may be in an industry or of a loan type known to have a higher degree of risk. Special Mention - Loans with potential weaknesses that deserve management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the asset or in the Bank’s position as creditor at some future date. Special Mention assets are not adversely classified and do not expose the Bank to sufficient risk to warrant adverse classification. Examples of these conditions include but are not limited to outdated or poor quality financial data, strains on liquidity and leverage, losses or negative trends in operating results, marginal cash flow, weaknesses in occupancy rates or trends in the case of commercial real estate and frequent delinquencies. Classified - Loans identified as “substandard,” “doubtful” or “loss” based on criteria consistent with guidelines provided by banking regulators. A “substandard” loan has defined weaknesses which make payment default or principal exposure likely, but not yet certain. Such loans are apt to be dependent upon collateral liquidation, a secondary source of repayment or an event outside of the normal course of business. The loans are closely watched and are either already on nonaccrual status or may be placed on nonaccrual status when management determines there is uncertainty of collectability. A “doubtful” loan is placed on nonaccrual status and has a high probability of loss, but the extent of the loss is difficult to quantify due to dependency upon collateral having a value that is difficult to determine or upon some near-term event which lacks certainty. A loan in the “loss” category is considered generally uncollectible or the timing or amount of payments cannot be determined. “Loss” is not intended to imply that the loan has no recovery value, but rather, it is not practical or desirable to continue to carry the asset. The Corporation’s procedures call for loan ratings and classifications to be revised whenever information becomes available that indicates a change is warranted. On a quarterly basis, management reviews the criticized loan portfolio, which generally consists of commercial loans that are risk-rated special mention or worse, and other selected loans. Management’s review focuses on the current status of the loans and strategies to improve the credit. An annual loan review program is conducted by a third party to provide an independent evaluation of the creditworthiness of the commercial loan portfolio, the quality of the underwriting and credit risk management practices and the appropriateness of the risk rating classifications. This review is supplemented with selected targeted internal reviews of the commercial loan portfolio. The following table presents the commercial loan portfolio, segregated by category of credit quality indicator: (Dollars in thousands) Pass Special Mention Classified Jun 30, Dec 31, Jun 30, Dec 31, Jun 30, Dec 31, Commercial: Commercial real estate $1,460,537 $1,387,666 $17,587 $205 $4,712 $4,537 Commercial & industrial 546,188 559,019 22,234 50,426 15,451 11,259 Total commercial $2,006,725 $1,946,685 $39,821 $50,631 $20,163 $15,796 Residential and Consumer Management monitors the relatively homogeneous residential real estate and consumer loan portfolios on an ongoing basis using delinquency information by loan type. For non-impaired residential real estate and consumer loans, the Corporation assigns loss allocation factors to each respective loan type. Other techniques are utilized to monitor indicators of credit deterioration in the residential real estate loans and consumer loan portfolios. Among these techniques is the periodic tracking of loans with an updated Fair Isaac Corporation (“FICO”) score and an estimated loan to value (“LTV”) ratio. LTV ratio is determined via statistical modeling analyses. The indicated LTV levels are estimated based on such factors as the location, the original LTV ratio, and the date of origination of the loan and do not reflect actual appraisal amounts. The results of these analyses and other loan review procedures are taken into consideration in the determination of loss allocation factors for residential mortgage and home equity consumer credits. The following table presents the residential and consumer loan portfolios, segregated by loan type and credit quality indicator: (Dollars in thousands) Current Past Due Jun 30, Dec 31, Jun 30, Dec 31, Residential Real Estate: Self-originated mortgages $1,239,272 $1,238,402 $10,141 $9,079 Purchased mortgages 101,604 111,465 1,096 1,441 Total residential real estate $1,340,876 $1,349,867 $11,237 $10,520 Consumer: Home equity $285,174 $278,637 $2,904 $1,989 Other 23,337 26,202 102 33 Total consumer $308,511 $304,839 $3,006 $2,022

Allowance for Loan Losses

Allowance for Loan Losses	6 Months Ended
	Jun. 30, 2019
Receivables [Abstract]
Allowance for Loan Losses	Allowance for Loan Losses The allowance for loan losses is management’s best estimate of incurred losses inherent in the loan portfolio as of the balance sheet date. The Corporation uses a methodology to systematically measure the amount of estimated loan loss exposure inherent in the loan portfolio for purposes of establishing a sufficient allowance for loan losses. The methodology includes: (1) the identification of loss allocations for individual loans deemed to be impaired and (2) the application of loss allocation factors for non-impaired loans based on historical loss experience and estimated loss emergence period, with adjustments for various exposures that management believes are not adequately represented by historical loss experience. The following table presents the activity in the allowance for loan losses for the three months ended June 30, 2019 : (Dollars in thousands) Commercial Consumer CRE (1) C&I (2) Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $17,191 $4,498 $21,689 $4,009 $1,589 $357 $1,946 $27,644 Charge-offs — (4 ) (4 ) (486 ) (311 ) (18 ) (329 ) (819 ) Recoveries — 20 20 — 22 6 28 48 Provision (309 ) (61 ) (370 ) 1,334 (387 ) (52 ) (439 ) 525 Ending Balance $16,882 $4,453 $21,335 $4,857 $913 $293 $1,206 $27,398 (1) Commercial real estate loans. (2) Commercial & industrial loans. The following table presents the activity in the allowance for loan losses for the six months ended June 30, 2019 : (Dollars in thousands) Commercial Consumer CRE (1) C&I (2) Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $15,381 $5,847 $21,228 $3,987 $1,603 $254 $1,857 $27,072 Charge-offs — (18 ) (18 ) (486 ) (372 ) (46 ) (418 ) (922 ) Recoveries — 28 28 — 35 10 45 73 Provision 1,501 (1,404 ) 97 1,356 (353 ) 75 (278 ) 1,175 Ending Balance $16,882 $4,453 $21,335 $4,857 $913 $293 $1,206 $27,398 (1) Commercial real estate loans. (2) Commercial & industrial loans. The following table presents the activity in the allowance for loan losses for the three months ended June 30, 2018 : (Dollars in thousands) Commercial Consumer CRE (1) C&I (2) Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $11,819 $5,871 $17,690 $5,494 $2,192 $488 $2,680 $25,864 Charge-offs — (1 ) (1 ) (5 ) (76 ) (21 ) (97 ) (103 ) Recoveries — 4 4 — 3 6 9 13 Provision 624 768 1,392 (175 ) (744 ) (73 ) (817 ) 400 Ending Balance $12,443 $6,642 $19,085 $5,314 $1,375 $400 $1,775 $26,174 (1) Commercial real estate loans. (2) Commercial & industrial loans. The following table presents the activity in the allowance for loan losses for the six months ended June 30, 2018 : (Dollars in thousands) Commercial Consumer CRE (1) C&I (2) Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $12,729 $5,580 $18,309 $5,427 $2,412 $340 $2,752 $26,488 Charge-offs (627 ) (7 ) (634 ) (5 ) (111 ) (43 ) (154 ) (793 ) Recoveries 25 33 58 — 10 11 21 79 Provision 316 1,036 1,352 (108 ) (936 ) 92 (844 ) 400 Ending Balance $12,443 $6,642 $19,085 $5,314 $1,375 $400 $1,775 $26,174 (1) Commercial real estate loans. (2) Commercial & industrial loans. The following table presents the Corporation’s loan portfolio and associated allowance for loan losses by portfolio segment and by impairment methodology: (Dollars in thousands) June 30, 2019 December 31, 2018 Loans Related Allowance Loans Related Allowance Loans Individually Evaluated for Impairment Commercial: Commercial real estate $926 $— $925 $— Commercial & industrial — — 4,714 — Total commercial 926 — 5,639 — Residential Real Estate: Residential real estate 10,969 97 9,710 100 Consumer: Home equity 1,245 20 1,445 24 Other 107 2 22 3 Total consumer 1,352 22 1,467 27 Subtotal 13,247 119 16,816 127 Loans Collectively Evaluated for Impairment Commercial: Commercial real estate 1,481,910 16,882 1,391,483 15,381 Commercial & industrial 583,873 4,453 615,990 5,847 Total commercial 2,065,783 21,335 2,007,473 21,228 Residential Real Estate: Residential real estate 1,341,144 4,760 1,350,677 3,887 Consumer: Home equity 286,833 893 279,182 1,579 Other 23,332 291 26,212 251 Total consumer 310,165 1,184 305,394 1,830 Subtotal 3,717,092 27,279 3,663,544 26,945 Total $3,730,339 $27,398 $3,680,360 $27,072

Federal Home Loan Bank Advances

Federal Home Loan Bank Advances	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Borrowings	Federal Home Loan Bank Advances Advances payable to the FHLB amounted to $1.1 billion and $950.7 million , respectively, at June 30, 2019 and December 31, 2018 . The following table presents maturities and weighted average interest rates on FHLB advances outstanding as of June 30, 2019 : (Dollars in thousands) Scheduled Weighted Average Rate July 1, 2019 to December 31, 2019 $534,996 2.58 % 2020 369,533 2.39 2021 86,222 2.73 2022 55,447 3.65 2023 9,428 4.01 2024 and thereafter 5,334 5.06 Balance at June 30, 2019 $1,060,960 2.60 % As of June 30, 2019 and December 31, 2018 , the Bank had access to a $40.0 million unused line of credit with the FHLB and also had remaining available borrowing capacity of $535.3 million and $628.5 million , respectively. The Bank pledges certain qualified investment securities and loans as collateral to the FHLB.

Shareholders' Equity

Shareholders' Equity	6 Months Ended
	Jun. 30, 2019
Regulatory Capital Requirements [Abstract]
Regulatory Capital Requirements	Shareholders' Equity Regulatory Capital Requirements Capital levels at June 30, 2019 exceeded the regulatory minimum levels to be considered “well capitalized.” The following table presents the Corporation’s and the Bank’s actual capital amounts and ratios, as well as the corresponding minimum and well capitalized regulatory amounts and ratios that were in effect during the respective periods: (Dollars in thousands) Actual For Capital Adequacy Purposes To Be “Well Capitalized” Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio June 30, 2019 Total Capital (to Risk-Weighted Assets): Corporation $475,982 12.80 % $297,470 8.00 % N/A N/A Bank 473,515 12.74 297,426 8.00 $371,783 10.00 % Tier 1 Capital (to Risk-Weighted Assets): Corporation 448,282 12.06 223,102 6.00 N/A N/A Bank 445,815 11.99 223,070 6.00 297,426 8.00 Common Equity Tier 1 Capital (to Risk-Weighted Assets): Corporation 426,284 11.46 167,327 4.50 N/A N/A Bank 445,815 11.99 167,302 4.50 241,659 6.50 Tier 1 Capital (to Average Assets): (1) Corporation 448,282 8.76 204,811 4.00 N/A N/A Bank 445,815 8.71 204,724 4.00 255,906 5.00 December 31, 2018 Total Capital (to Risk-Weighted Assets): Corporation 455,699 12.56 290,146 8.00 N/A N/A Bank 453,033 12.49 290,128 8.00 362,660 10.00 Tier 1 Capital (to Risk-Weighted Assets): Corporation 428,338 11.81 217,609 6.00 N/A N/A Bank 425,672 11.74 217,596 6.00 290,128 8.00 Common Equity Tier 1 Capital (to Risk-Weighted Assets): Corporation 406,340 11.20 163,207 4.50 N/A N/A Bank 425,672 11.74 163,197 4.50 235,729 6.50 Tier 1 Capital (to Average Assets): (1) Corporation 428,338 8.89 192,690 4.00 N/A N/A Bank 425,672 8.84 192,652 4.00 240,815 5.00 (1) Leverage ratio. In addition to the minimum regulatory capital required for capital adequacy purposes included in the table above, the Corporation is required to maintain a minimum capital conservation buffer, in the form of common equity, in order to avoid restrictions on capital distributions and discretionary bonuses. The required amount of the capital conservation buffer was 1.875% on January 1, 2018. The capital conservation buffer increased another 0.625% on January 1, 2019, reaching the full requirement of 2.50%. The Bancorp owns the common stock of two capital trusts, which have issued trust preferred securities. In accordance with GAAP, the capital trusts are treated as unconsolidated subsidiaries. At both June 30, 2019 and December 31, 2018 , $22.0 million in trust preferred securities were included in the Tier 1 Capital of the Corporation for regulatory capital reporting purposes pursuant to the Federal Reserve’s capital adequacy guidelines.

Derivative Financial Instrument

Derivative Financial Instruments	6 Months Ended
	Jun. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments The Corporation’s derivative financial instruments are used to manage differences in the amount, timing and duration of the Corporation’s known or expected cash receipts and its known or expected cash payments principally to manage the Corporation’s interest rate risk. Additionally, the Corporation enters into interest rate derivatives to accommodate the business requirements of its customers. All derivatives are recognized as either assets or liabilities on the balance sheet and are measured at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative and resulting designation. Interest Rate Risk Management Agreements Interest rate risk management agreements, such as caps, swaps, and floors, are used from time to time as part of the Corporation’s interest rate risk management strategy. Interest rate swaps are agreements in which the Corporation and another party agree to exchange interest payments (e.g., fixed-rate for variable-rate payments) computed on a notional principal amount. Interest rate caps and floors represent options purchased by the Corporation to manage the interest rate paid throughout the term of the option contract. The credit risk associated with these transactions is the risk of default by the counterparty. To minimize this risk, the Corporation enters into interest rate agreements only with highly rated counterparties that management believes to be creditworthy. The notional amounts of these agreements do not represent amounts exchanged by the parties and, thus, are not a measure of the potential loss exposure. Cash Flow Hedging Instruments As of June 30, 2019 and December 31, 2018 , the Bancorp had two interest rate caps with a total notional amount of $22.7 million that were designated as cash flow hedges to hedge the interest rate risk associated with our variable rate junior subordinated debentures. For both interest rate caps, the Bancorp obtained the right to receive the difference between 3-month LIBOR and a 4.5% strike. The caps mature in 2020. As of June 30, 2019 and December 31, 2018 , the Bank had two interest rate swap contracts with a total notional amount of $60.0 million that were designated as cash flow hedges to hedge the interest rate risk associated with short-term variable rate FHLB advances. The interest rate swaps mature in 2021 and 2023. As of June 30, 2019 and December 31, 2018 , the Bank had three interest rate floor contracts with a total notional amount of $300.0 million that were designated as cash flow hedges to hedge the interest rate risk associated with a pool of variable rate commercial loans. The Bank obtained the right to receive the difference between 1-month LIBOR and a 1.0% strike for each of the interest rate floors. The floors mature in 2020. The changes in fair value of derivatives designated as cash flow hedges are recorded in other comprehensive income and subsequently reclassified to earnings when gains or losses are realized. Loan Related Derivative Contracts Interest Rate Swap Contracts with Customers The Corporation has entered into interest rate swap contracts to help commercial loan borrowers manage their interest rate risk. The interest rate swap contracts with commercial loan borrowers allow them to convert variable-rate loan payments to fixed-rate loan payments. When we enter into an interest rate swap contract with a commercial loan borrower, we simultaneously enter into a “mirror” swap contract with a third party. The third party exchanges the client’s fixed-rate loan payments for variable-rate loan payments. We retain the risk that is associated with the potential failure of counterparties and the risk inherent in originating loans. As of June 30, 2019 and December 31, 2018 , Washington Trust had interest rate swap contracts with commercial loan borrowers with notional amounts of $678.9 million and $ 648.0 million , respectively, and equal amounts of “mirror” swap contracts with third-party financial institutions. These derivatives are not designated as hedges and therefore, changes in fair value are recognized in earnings. Risk Participation Agreements The Corporation has entered into risk participation agreements with other banks in commercial loan arrangements. Participating banks guarantee the performance on borrower-related interest rate swap contracts. These derivatives are not designated as hedges and therefore, changes in fair value are recognized in earnings. Under a risk participation-out agreement, a derivative asset, the Corporation participates out a portion of the credit risk associated with the interest rate swap position executed with the commercial borrower for a fee paid to the participating bank. Under a risk participation-in agreement, a derivative liability, the Corporation assumes, or participates in, a portion of the credit risk associated with the interest rate swap position with the commercial borrower for a fee received from the other bank. As of June 30, 2019 , the notional amounts of risk participation-out agreements and risk participation-in agreements were $44.7 million and $46.2 million , respectively, compared to $57.3 million and $46.5 million , respectively, as of December 31, 2018 . Foreign Exchange Contracts Foreign exchange contracts represent contractual commitments to buy or sell a foreign currency on a future date at a specified price. The Corporation uses these foreign exchange contracts on a limited basis to reduce its exposure to fluctuations in currency exchange rates associated with a commercial loan that is denominated in a foreign currency. These derivatives are not designated as hedges and therefore changes in fair value are recognized in earnings. The changes in fair value on the foreign exchange contracts substantially offset the foreign currency translation gains and losses on the related commercial loan. The notional amount of foreign exchange contracts was $2.8 million as of both June 30, 2019 and December 31, 2018 . Loan Commitments Interest rate lock commitments are extended to borrowers and relate to the origination of mortgage loans held for sale. To mitigate the interest rate risk and pricing risk associated with rate locks and mortgage loans held for sale, the Corporation enters into forward sale commitments. Forward sale commitments are contracts for delayed delivery or net settlement of the underlying instrument, such as a residential real estate mortgage loan, where the seller agrees to deliver on a specified future date, either a specified instrument at a specified price or yield or the net cash equivalent of an underlying instrument. Both interest rate lock commitments and forward sale commitments are derivative financial instruments, but do not meet criteria for hedge accounting and therefore, the changes in fair value of these commitments are reflected in earnings. As of June 30, 2019 , the notional amounts of interest rate lock commitments and forward sale commitments were $89.7 million and $149.4 million , respectively, compared to $30.8 million and $62.0 million , respectively, as of December 31, 2018 . The following table presents the fair values of derivative instruments in the Corporation’s Unaudited Consolidated Balance Sheets: (Dollars in thousands) Asset Derivatives Liability Derivatives Fair Value Fair Value Balance Sheet Location Jun 30, 2019 Dec 31, 2018 Balance Sheet Location Jun 30, 2019 Dec 31, 2018 Derivatives Designated as Cash Flow Hedging Instruments: Interest rate risk management contracts: Interest rate caps Other assets $— $20 Other liabilities $— $— Interest rate swaps Other assets 7 903 Other liabilities 724 — Interest rate floors Other assets 120 37 Other liabilities — — Derivatives not Designated as Hedging Instruments: Loan related derivative contracts: Interest rate swaps with customers Other assets 25,857 5,340 Other liabilities 429 7,719 Mirror swaps with counterparties Other assets 420 7,592 Other liabilities 25,955 5,392 Risk participation agreements Other assets 1 — Other liabilities 1 — Foreign exchange contracts Other assets 4 — Other liabilities — 7 Forward loan commitments: Interest rate lock commitments Other assets 2,102 806 Other liabilities — — Forward sale commitments Other assets 23 — Other liabilities 1,560 816 Gross amounts 28,534 14,698 28,669 13,934 Less amounts offset in Consolidated Balance Sheets (1) 551 10,732 551 10,732 Net amounts presented in Consolidated Balance Sheets 27,983 3,966 28,118 3,202 Less collateral pledged (2) — — 25,303 1,460 Net amounts $27,983 $3,966 $2,815 $1,742 (1) Interest rate risk management contracts and loan related derivative contracts with counterparties are subject to master netting arrangements. (2) Collateral pledged to derivative counterparties is in the form of cash. Washington Trust may need to post additional collateral in the future in proportion to potential increases in unrealized loss positions. The following tables present the effect of derivative instruments in the Corporation’s Unaudited Consolidated Statements of Changes in Shareholders’ Equity and Unaudited Consolidated Statements of Income: (Dollars in thousands) Gain (Loss) Recognized in Other Comprehensive Income, Net of Tax Three Months Six Months Periods ended June 30, 2019 2018 2019 2018 Derivatives Designated as Cash Flow Hedging Instruments: Interest rate risk management contracts: Interest rate caps $14 $11 $14 $49 Interest rate swaps (765 ) 294 (1,231 ) 1,133 Interest rate floors 129 60 153 72 Total ($622 ) $365 ($1,064 ) $1,254 See Note 15 for additional disclosure pertaining to the amounts reclassified from accumulated other comprehensive income into earnings for derivatives designated as cash flow hedging instruments. (Dollars in thousands) Amount of Gain (Loss) Recognized in Income on Derivatives Three Months Six Months Periods ended June 30, Statement of Income Location 2019 2018 2019 2018 Derivatives not Designated as Hedging Instruments: Loan related derivative contracts: Interest rate swaps with customers Loan related derivative income $16,974 ($3,001 ) 27,284 (12,196 ) Mirror swaps with counterparties Loan related derivative income (16,246 ) 3,645 (25,850 ) 12,969 Risk participation agreements Loan related derivative income — — — — Foreign exchange contracts Loan related derivative income 18 24 36 36 Forward loan commitments: Interest rate lock commitments Mortgage banking revenues 610 191 $1,295 $177 Forward sale commitments Mortgage banking revenues (1,439 ) (82 ) (1,868 ) 1,236 Total ($83 ) $777 $897 $2,222

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The Corporation uses fair value measurements to record fair value adjustments on certain assets and liabilities and to determine fair value disclosures. Items recorded at fair value on a recurring basis include securities available for sale, mortgage loans held for sale and derivatives. Additionally, from time to time, we may be required to record at fair value other assets on a nonrecurring basis, such as collateral dependent impaired loans, property acquired through foreclosure or repossession and mortgage servicing rights. These nonrecurring fair value adjustments typically involve the application of lower of cost or market accounting or write-downs of individual assets. Fair value is a market-based measurement, not an entity-specific measurement. Fair value measurements are determined based on the assumptions the market participants would use in pricing the asset or liability. In addition, GAAP specifies a hierarchy of valuation techniques based on whether the types of valuation information (“inputs”) are observable or unobservable. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect the Corporation’s market assumptions. These two types of inputs have created the following fair value hierarchy: • Level 1 – Quoted prices for identical assets or liabilities in active markets. • Level 2 – Quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in inactive markets; and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets. • Level 3 – Valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable in the markets and which reflect the Corporation’s market assumptions. Fair Value Option Election GAAP allows for the irrevocable option to elect fair value accounting for the initial and subsequent measurement for certain financial assets and liabilities on a contract-by-contract basis. The Corporation has elected the fair value option for mortgage loans held for sale to better match changes in fair value of the loans with changes in the fair value of the forward sale commitment contracts used to economically hedge them. The following table presents a summary of mortgage loans held for sale accounted for under the fair value option: (Dollars in thousands) June 30, December 31, Aggregate fair value $39,996 $20,996 Aggregate principal balance 38,953 20,498 Difference between fair value and principal balance $1,043 $498 Changes in fair value of mortgage loans held for sale accounted for under the fair value option election amounted to an increase of $679 thousand and $544 thousand in the three and six months ended June 30, 2019 , respectively, compared to an increase of $441 thousand and $112 thousand in the three and six months ended June 30, 2018 , respectively. These amounts were partially offset in earnings by the changes in fair value of forward sale commitments used to economically hedge them. The changes in fair value are reported as a component of mortgage banking revenues in the Unaudited Consolidated Statements of Income. There were no mortgage loans held for sale 90 days or more past due as of June 30, 2019 and December 31, 2018 . Valuation Techniques Debt Securities Available for sale debt securities are recorded at fair value on a recurring basis. When available, the Corporation uses quoted market prices to determine the fair value of debt securities; such items are classified as Level 1. There were no Level 1 debt securities held at June 30, 2019 and December 31, 2018 . Level 2 debt securities are traded less frequently than exchange-traded instruments. The fair value of these securities is determined using matrix pricing with inputs that are observable in the market or can be derived principally from or corroborated by observable market data. This category includes obligations of U.S. government-sponsored enterprises, including mortgage-backed securities, obligations of states and political subdivisions, individual name issuer trust preferred debt securities and corporate bonds. Debt securities not actively traded whose fair value is determined through the use of cash flows utilizing inputs that are unobservable are classified as Level 3. There were no Level 3 debt securities held at June 30, 2019 and December 31, 2018 . Mortgage Loans Held for Sale The fair value of mortgage loans held for sale is estimated based on current market prices for similar loans in the secondary market and therefore are classified as Level 2 assets. Collateral Dependent Impaired Loans The fair value of collateral dependent loans that are deemed to be impaired is determined based upon the fair value of the underlying collateral. Such collateral primarily consists of real estate and, to a lesser extent, other business assets. For collateral dependent loans for which repayment is dependent on the sale of the collateral, management adjusts the fair value for estimated costs to sell. For collateral dependent loans for which repayment is dependent on the operation of the collateral, such as accruing troubled debt restructured loans, estimated costs to sell are not incorporated into the measurement. Management may also adjust appraised values to reflect estimated market value declines or apply other discounts to appraised values resulting from its knowledge of the property. Internal valuations are utilized to determine the fair value of other business assets. Collateral dependent impaired loans are categorized as Level 3. Property Acquired Through Foreclosure or Repossession Property acquired through foreclosure or repossession included in other assets in the Unaudited Consolidated Balance Sheets is adjusted to fair value less costs to sell upon transfer out of loans through a charge to allowance for loan losses. Subsequently, it is carried at the lower of carrying value or fair value less costs to sell. Such subsequent valuation charges are charged through earnings. Fair value is generally based upon appraised values of the collateral. Management may adjust appraised values to reflect estimated market value declines or apply other discounts to appraised values for unobservable factors resulting from its knowledge of the property, and such property is categorized as Level 3. Derivatives Interest rate cap, swap and floor contracts are traded in over-the-counter markets where quoted market prices are not readily available. Fair value measurements are determined using independent pricing models that utilize primarily market observable inputs, such as swap rates of different maturities and LIBOR rates. The Corporation also evaluates the credit risk of its counterparties as well as that of the Corporation. Accordingly, factors such as the likelihood of default by the Corporation and its counterparties, its net exposures and remaining contractual life are considered in determining if any fair value adjustments related to credit risk are required. Counterparty exposure is evaluated by netting positions that are subject to master netting agreements, as well as considering the amount of collateral securing the position, if any. Although the Corporation has determined that the majority of the inputs used to value its interest rate swap, cap and floor contracts fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with interest rate contracts and risk participation agreements utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by the Corporation and its counterparties. However, as of June 30, 2019 and December 31, 2018 , the Corporation has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and has determined that the credit valuation adjustments are not significant to the overall valuation of its derivatives. As a result, the Corporation has classified its derivative valuations in their entirety as Level 2. Fair value measurements of forward loan commitments (interest rate lock commitments and forward sale commitments) are primarily based on current market prices for similar assets in the secondary market for mortgage loans and therefore are classified as Level 2 assets. The fair value of interest rate lock commitments is also dependent on the ultimate closing of the loans. Pull-through rates are based on the Corporation’s historical data and reflect the Corporation’s best estimate of the likelihood that a commitment will result in a closed loan. Although the pull-through rates are Level 3 inputs, the Corporation has assessed the significance of the impact of pull-through rates on the overall valuation of its interest rate lock commitments and has determined that they are not significant to the overall valuation. As a result, the Corporation has classified its interest rate lock commitments as Level 2. Contingent Consideration Liability A contingent consideration liability was recognized upon the completion of the Halsey Associates, Inc. acquisition on August 1, 2015 representing the estimated present value of future earn-outs to be paid based on the future revenue growth of the acquired business during the five-year period following the acquisition. The fair value measurement was based upon unobservable inputs; therefore, the contingent liability was classified within Level 3 of the fair value hierarchy. The unobservable inputs included probability estimates regarding the likelihood of achieving revenue growth targets and the discount rates utilized the discounted cash flow calculations applied to the estimated earn-outs to be paid. The contingent consideration liability was remeasured to fair value at each reporting period taking into consideration changes in those unobservable inputs. Changes in the fair value of the contingent consideration liability were included in noninterest expenses in the Consolidated Statements of Income. One of the two earn-out periods associated with this contingent consideration liability ended December 31, 2017 and a payment of $1.2 million was made by the Corporation in the first quarter of 2018. The likelihood of payout on the remaining earn-out period had been deemed remote and as a result the fair value of the contingent consideration liability was reduced to zero in the fourth quarter of 2018 . There have been no changes to the fair value of the contingent consideration liability for the three and six months ended June 30, 2019 . Items Recorded at Fair Value on a Recurring Basis The following tables present the balances of assets and liabilities reported at fair value on a recurring basis: (Dollars in thousands) Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) June 30, 2019 Assets: Available for sale debt securities: Obligations of U.S. government-sponsored enterprises $237,427 $— $237,427 $— Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 707,180 — 707,180 — Obligations of states and political subdivisions 90 — 90 — Individual name issuer trust preferred debt securities 12,301 — 12,301 — Corporate bonds 12,170 — 12,170 — Mortgage loans held for sale 39,996 — 39,996 — Derivative assets 27,983 — 27,983 — Total assets at fair value on a recurring basis $1,037,147 $— $1,037,147 $— Liabilities: Derivative liabilities $28,118 $— $28,118 $— Total liabilities at fair value on a recurring basis $28,118 $— $28,118 $— (Dollars in thousands) Total Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs December 31, 2018 Assets: Available for sale debt securities: Obligations of U.S. government-sponsored enterprises $242,683 $— $242,683 $— Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 660,793 — 660,793 — Obligations of states and political subdivisions 937 — 937 — Individual name issuer trust preferred debt securities 11,772 — 11,772 — Corporate bonds 11,625 — 11,625 — Mortgage loans held for sale 20,996 — 20,996 — Derivative assets 3,966 — 3,966 — Total assets at fair value on a recurring basis $952,772 $— $952,772 $— Liabilities: Derivative liabilities $3,202 $— $3,202 $— Total liabilities at fair value on a recurring basis $3,202 $— $3,202 $— It is the Corporation’s policy to review and reflect transfers between Levels as of the financial statement reporting date. There were no transfers in and/or out of Level 1, 2 or 3 during the six months ended June 30, 2019 and 2018 . Items Recorded at Fair Value on a Nonrecurring Basis The following table presents the carrying value of assets held at June 30, 2019 , which were written down to fair value during the six months ended June 30, 2019 : (Dollars in thousands) Total Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Assets: Collateral dependent impaired loans $768 $— $— $768 Total assets at fair value on a nonrecurring basis $768 $— $— $768 The allowance for loan losses on collateral dependent impaired loans amounted to $20 thousand at June 30, 2019 . The following table presents the carrying value of assets held at December 31, 2018 , which were written down to fair value during the year ended December 31, 2018 : (Dollars in thousands) Total Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Assets: Collateral dependent impaired loans $883 $— $— $883 Property acquired through foreclosure or repossession 2,142 — — 2,142 Total assets at fair value on a nonrecurring basis $3,025 $— $— $3,025 The allowance for loan losses on collateral dependent impaired loans amounted to $24 thousand at December 31, 2018 . The following tables present valuation techniques and unobservable inputs for assets measured at fair value on a nonrecurring basis for which the Corporation has utilized Level 3 inputs to determine fair value: (Dollars in thousands) Fair Value Valuation Technique Unobservable Input Range of Inputs Utilized (Weighted Average) June 30, 2019 Collateral dependent impaired loans $768 Appraisals of collateral Discount for costs to sell 0% - 12% (12%) Appraisal adjustments (1) 0% - 100% (16%) (1) Management may adjust appraisal values to reflect market value declines or other discounts resulting from its knowledge of the property. (Dollars in thousands) Fair Value Valuation Technique Unobservable Input Range of Inputs Utilized (Weighted Average) December 31, 2018 Collateral dependent impaired loans $883 Appraisals of collateral Discount for costs to sell 0% - 10% (10%) Appraisal adjustments (1) 0% - 100% (2%) Property acquired through foreclosure or repossession $2,142 Appraisals of collateral Discount for costs to sell 13% Appraisal adjustments (1) 12% - 28% (20%) (1) Management may adjust appraisal values to reflect market value declines or other discounts resulting from its knowledge of the property. Valuation of Financial Instruments The estimated fair values and related carrying amounts for financial instruments for which fair value is only disclosed are presented below as of the periods indicated. The tables exclude financial instruments for which the carrying value approximates fair value such as cash and cash equivalents, FHLB stock, accrued interest receivable, bank-owned life insurance, non-maturity deposits and accrued interest payable. (Dollars in thousands) June 30, 2019 Carrying Amount Total Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Financial Assets: Loans, net of allowance for loan losses $3,702,941 $3,693,614 $— $— $3,693,614 Financial Liabilities: Time deposits $1,284,538 $1,302,002 $— $1,302,002 $— FHLB advances 1,060,960 1,066,411 — 1,066,411 — Junior subordinated debentures 22,681 19,457 — 19,457 — (Dollars in thousands) December 31, 2018 Carrying Amount Total Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Financial Assets: Held to maturity debt securities $10,415 $10,316 $— $10,316 $— Loans, net of allowance for loan losses 3,653,288 3,598,025 — — 3,598,025 Financial Liabilities: Time deposits $1,255,108 $1,269,433 $— $1,269,433 $— FHLB advances 950,722 950,691 — 950,691 — Junior subordinated debentures 22,681 19,226 — 19,226 —

Revenue from Contracts with Cus

Revenue from Contracts with Customers	6 Months Ended
	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers	Revenue from Contracts with Customers The following tables summarize total revenues as presented in the Unaudited Consolidated Statements of Income and the related amounts which are from contracts with customers within the scope of Topic 606. As shown below, a substantial portion of our revenues are specifically excluded from the scope of Topic 606. For the three months ended June 30, 2019 2018 (Dollars in thousands) As reported in Consolidated Statements of Income Revenue from contracts in scope of Topic 606 As reported in Consolidated Statements of Income Revenue from contracts in scope of Topic 606 Net interest income $33,858 $— $33,111 $— Noninterest income: Asset-based wealth management revenues 9,141 9,141 9,136 9,136 Transaction-based wealth management revenues 408 408 466 466 Total wealth management revenues 9,549 9,549 9,602 9,602 Mortgage banking revenues 3,640 — 2,941 — Card interchange fees 1,018 1,018 961 961 Service charges on deposit accounts 929 929 903 903 Loan related derivative income 746 — 668 — Income from bank-owned life insurance 566 — 537 — Net realized losses on securities (80 ) — — — Other income 385 371 381 366 Total noninterest income 16,753 11,867 15,993 11,832 Total revenues $50,611 $11,867 $49,104 $11,832 For the six months ended June 30, 2019 2018 (Dollars in thousands) As reported in Consolidated Statements of Income Revenue from contracts in scope of Topic 606 As reported in Consolidated Statements of Income Revenue from contracts in scope of Topic 606 Net interest income $68,442 $— $64,963 $— Noninterest income: Asset-based wealth management revenues 18,062 18,062 19,091 19,091 Transaction-based wealth management revenues 739 739 784 784 Total wealth management revenues 18,801 18,801 19,875 19,875 Mortgage banking revenues 6,286 — 5,779 — Card interchange fees 2,015 2,015 1,808 1,808 Service charges on deposit accounts 1,804 1,804 1,766 1,766 Loan related derivative income 1,470 — 809 — Income from bank-owned life insurance 1,215 — 1,052 — Net realized losses on securities (80 ) — — — Other income 609 595 647 632 Total noninterest income 32,120 23,215 31,736 24,081 Total revenues $100,562 $23,215 $96,699 $24,081 The following table presents revenue from contracts with customers based on the timing of revenue recognition: (Dollars in thousands) Three Months Six Months Periods ended June 30, 2019 2018 2019 2018 Revenue recognized at a point in time: Card interchange fees $1,018 $961 $2,015 $1,808 Service charges on deposit accounts 719 703 1,381 1,375 Other income 324 248 503 474 Revenue recognized over time: Wealth management revenues 9,549 9,602 18,801 19,875 Service charges on deposit accounts 210 200 423 391 Other income 47 118 92 158 Total revenues from contracts in scope of Topic 606 $11,867 $11,832 $23,215 $24,081 Receivables primarily consist of amounts due from customers for wealth management services performed for which the Corporation’s performance obligations have been fully satisfied. Receivables amounted to $5.0 million at June 30, 2019 , compared to $4.8 million at December 31, 2018 and were included in other assets in the Unaudited Consolidated Balance Sheets. Deferred revenues, which are considered contract liabilities under Topic 606, represent advance consideration received from customers for which the Corporation has a remaining performance obligation to fulfill. Contract liabilities are recognized as revenue over the life of the contract as the performance obligations are satisfied. The balances of contract liabilities were insignificant at both June 30, 2019 and December 31, 2018 and were included in other liabilities in the Unaudited Consolidated Balance Sheets. For commissions and incentives that are in-scope of Topic 606, such as those paid to employees in our wealth management services and commercial banking segments in order to obtain customer contracts, contract cost assets are established. The contract cost assets are capitalized and amortized over the estimated useful life that the asset is expected to generate benefits. The carrying value of contract cost assets amounted to $580 thousand at June 30, 2019 , compared to $458 thousand at December 31, 2018 and were included in other assets in the Unaudited Consolidated Balance Sheets.

Defined Benefit Pension Plans

Defined Benefit Pension Plans	6 Months Ended
	Jun. 30, 2019
Defined Benefit Plan [Abstract]
Defined Benefit Pension Plans	Defined Benefit Pension Plans Washington Trust maintains a qualified pension plan for the benefit of certain eligible employees who were hired prior to October 1, 2007. Washington Trust also has non-qualified retirement plans to provide supplemental retirement benefits to certain employees, as defined in the plans. The defined benefit pension plans were previously amended to freeze benefit accruals after a 10 -year transition period ending in December 2023. The qualified pension plan is funded on a current basis, in compliance with the requirements of ERISA. The following table presents components of net periodic benefit cost and other amounts recognized in other comprehensive income (loss), on a pre-tax basis: (Dollars in thousands) Qualified Pension Plan Non-Qualified Retirement Plans Three Months Six Months Three Months Six Months Periods ended June 30, 2019 2018 2019 2018 2019 2018 2019 2018 Net Periodic Benefit Cost: Service cost (1) $509 $561 $1,018 $1,122 $32 $27 $63 $54 Interest cost (2) 742 678 1,484 1,357 141 118 282 237 Expected return on plan assets (2) (1,123 ) (1,318 ) (2,247 ) (2,636 ) — — — — Amortization of prior service credit (2) (4 ) (5 ) (8 ) (11 ) — — — — Recognized net actuarial loss (2) 198 374 396 748 101 103 203 205 Net periodic benefit cost $322 $290 $643 $580 $274 $248 $548 $496 (1) Included in salaries and employee benefits expense in the Unaudited Consolidated Statements of Income. (2) Included in other expenses in the Unaudited Consolidated Statements of Income. The following table presents the measurement date and weighted-average assumptions used to determine net periodic benefit cost: Qualified Pension Plan Non-Qualified Retirement Plans For the six months ended June 30, 2019 2018 2019 2018 Measurement date Dec 31, 2018 Dec 31, 2017 Dec 31, 2018 Dec 31, 2017 Equivalent single discount rate for benefit obligations 4.38% 3.69% 4.28% 3.58% Equivalent single discount rate for service cost 4.44 3.76 4.48 3.79 Equivalent single discount rate for interest cost 4.12 3.42 3.98 3.22 Expected long-term return on plan assets 5.75 6.75 N/A N/A Rate of compensation increase 3.75 3.75 3.75 3.75

Share-Based Compensation Arrang

Share-Based Compensation Arrangements	6 Months Ended
	Jun. 30, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Compensation Arrangements	Share-Based Compensation Arrangements During the six months ended June 30, 2019 , the Corporation granted performance share unit awards and nonvested share unit awards. Performance share awards were granted to certain executive and non-executive officers to provide them with the opportunity to earn shares of common stock of the Corporation. The performance share awards were valued at fair market value as determined by the closing price of the Corporation’s common stock on the award date. The weighted average fair value of the performance share awards was $52.83 . The number of shares to be vested will be contingent upon the Corporation’s attainment of certain performance measures as detailed in the performance share award agreements. The performance share awards will earned over a 3 -year performance period and the current performance assumption results in 43,360 shares being earned. The Corporation granted to non-executive officers and directors 10,870 nonvested share units, with 3 -year cliff vesting. The weighted average grant date fair value of the nonvested share units was $51.43 .

Business Segments

Business Segments	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Business Segments	Business Segments Washington Trust segregates financial information in assessing its results among its Commercial Banking and Wealth Management Services operating segments. The amounts in the Corporate unit include activity not related to the segments. Management uses certain methodologies to allocate income and expenses to the business lines. A funds transfer pricing (“FTP”) methodology is used to assign interest income and interest expense to each interest-earning asset and interest-bearing liability on a matched maturity funding basis. The matched maturity funding concept considers the origination date and the earlier of the maturity date or the repricing date of a financial instrument to assign an FTP rate for loans and deposits originated. Loans are assigned a FTP rate for funds used and deposits are assigned a FTP rate for funds provided. Certain indirect expenses are allocated to segments. These include support unit expenses such as technology, operations and other support functions. Commercial Banking The Commercial Banking segment includes commercial, residential and consumer lending activities; mortgage banking activities; deposit generation; cash management activities; and direct banking activities, which include the operation of ATMs, telephone and internet banking services and customer support and sales. Wealth Management Services Wealth Management Services includes investment management; financial planning; personal trust and estate services, including services as trustee, personal representative, custodian and guardian; and settlement of decedents’ estates. Institutional trust services are also provided, including fiduciary services. Corporate Corporate includes the Treasury Unit, which is responsible for managing the wholesale investment portfolio and wholesale funding needs. It also includes income from bank-owned life insurance (“BOLI”), as well as administrative and executive expenses not allocated to the operating segments and the residual impact of methodology allocations such as FTP offsets. The following table presents the statement of operations and total assets for Washington Trust’s reportable segments: (Dollars in thousands) Commercial Banking Wealth Management Services Corporate Consolidated Total Three months ended June 30, 2019 2018 2019 2018 2019 2018 2019 2018 Net interest income (expense) $27,867 $26,644 ($120 ) ($77 ) $6,111 $6,544 $33,858 $33,111 Provision for loan losses 525 400 — — — — 525 400 Net interest income (expense) after provision for loan losses 27,342 26,244 (120 ) (77 ) 6,111 6,544 33,333 32,711 Noninterest income 6,690 5,837 9,557 9,602 506 554 16,753 15,993 Noninterest expenses: Depreciation and amortization expense 672 637 363 370 39 43 1,074 1,050 Other noninterest expenses 16,660 15,509 6,937 6,593 3,480 3,136 27,077 25,238 Total noninterest expenses 17,332 16,146 7,300 6,963 3,519 3,179 28,151 26,288 Income before income taxes 16,700 15,935 2,137 2,562 3,098 3,919 21,935 22,416 Income tax expense 3,603 3,387 582 655 477 700 4,662 4,742 Net income $13,097 $12,548 $1,555 $1,907 $2,621 $3,219 $17,273 $17,674 Total assets at period end $3,916,915 $3,647,649 $77,757 $68,009 $1,195,000 $1,021,584 $5,189,672 $4,737,242 Expenditures for long-lived assets 297 801 — 11 19 52 316 864 (Dollars in thousands) Commercial Banking Wealth Management Services Corporate Consolidated Total Six months ended June 30, 2019 2018 2019 2018 2019 2018 2019 2018 Net interest income (expense) $55,169 $52,620 ($247 ) ($135 ) $13,520 $12,478 $68,442 $64,963 Provision for loan losses 1,175 400 — — — — 1,175 400 Net interest income (expense) after provision for loan losses 53,994 52,220 (247 ) (135 ) 13,520 12,478 67,267 64,563 Noninterest income 12,146 10,773 18,808 19,875 1,166 1,088 32,120 31,736 Noninterest expenses: Depreciation and amortization expense 1,342 1,274 729 766 79 85 2,150 2,125 Other noninterest expenses 32,421 30,975 13,414 13,792 7,130 6,526 52,965 51,293 Total noninterest expenses 33,763 32,249 14,143 14,558 7,209 6,611 55,115 53,418 Income before income taxes 32,377 30,744 4,418 5,182 7,477 6,955 44,272 42,881 Income tax expense 7,024 6,490 1,199 1,298 1,281 1,208 9,504 8,996 Net income $25,353 $24,254 $3,219 $3,884 $6,196 $5,747 $34,768 $33,885 Total assets at period end $3,916,915 $3,647,649 $77,757 $68,009 $1,195,000 $1,021,584 $5,189,672 $4,737,242 Expenditures for long-lived assets 1,597 1,252 292 313 82 110 1,971 1,675

Other Comprehensive Income (Los

Other Comprehensive Income (Loss)	6 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Other Comprehensive Income (Loss)	Other Comprehensive Income (Loss) The following tables present the activity in other comprehensive income (loss): Three months ended June 30, 2019 2018 (Dollars in thousands) Pre-tax Amounts Income Taxes Net of Tax Pre-tax Amounts Income Taxes Net of Tax Securities available for sale: Changes in fair value of available for sale debt securities $7,807 $1,835 $5,972 ($4,068 ) ($956 ) ($3,112 ) Net losses on debt securities reclassified into earnings (1) 80 19 61 — — — Net change in fair value of available for sale debt securities 7,887 1,854 6,033 (4,068 ) (956 ) (3,112 ) Cash flow hedges: Change in fair value of cash flow hedges (824 ) (194 ) (630 ) 455 107 348 Net cash flow hedge losses reclassified into earnings (2) 10 2 8 21 4 17 Net change in fair value of cash flow hedges (814 ) (192 ) (622 ) 476 111 365 Defined benefit plan obligations: Amortization of net actuarial losses (3) 300 71 229 477 113 364 Amortization of net prior service credits (3) (4 ) (1 ) (3 ) (5 ) (1 ) (4 ) Net change in defined benefit plan obligations 296 70 226 472 112 360 Total other comprehensive income (loss) $7,369 $1,732 $5,637 ($3,120 ) ($733 ) ($2,387 ) (1) The pre-tax amount is reported as net realized losses on securities in the Unaudited Consolidated Statements of Income. (2) The pre-tax amounts are included in interest expense on FHLB advances, interest expense on junior subordinated debentures and interest and fees on loans in the Unaudited Consolidated Statements of Income. (3) The pre-tax amounts are included in other expenses in the Unaudited Consolidated Statements of Income. Six months ended June 30, 2019 2018 (Dollars in thousands) Pre-tax Amounts Income Taxes Net of Tax Pre-tax Amounts Income Taxes Net of Tax Securities available for sale: Changes in fair value of available for sale debt securities $22,213 $5,220 $16,993 ($17,681 ) ($4,155 ) ($13,526 ) Net losses on debt securities reclassified into earnings (1) 80 19 61 — — — Net change in fair value of available for sale debt securities 22,293 5,239 17,054 (17,681 ) (4,155 ) (13,526 ) Cash flow hedges: Change in fair value of cash flow hedges (1,370 ) (322 ) (1,048 ) 1,258 198 1,060 Net cash flow hedge losses reclassified into earnings (2) (21 ) (5 ) (16 ) 252 58 194 Net change in fair value of cash flow hedges (1,391 ) (327 ) (1,064 ) 1,510 256 1,254 Defined benefit plan obligations: Amortization of net actuarial losses (3) 600 141 459 953 225 728 Amortization of net prior service credits (3) (8 ) (2 ) (6 ) (11 ) (3 ) (8 ) Net change in defined benefit plan obligations 592 139 453 942 222 720 Total other comprehensive (loss) income $21,494 $5,051 $16,443 ($15,229 ) ($3,677 ) ($11,552 ) (1) The pre-tax amount is reported as net realized losses on securities in the Unaudited Consolidated Statements of Income. (2) The pre-tax amounts are included in interest expense on FHLB advances, interest expense on junior subordinated debentures and interest and fees on loans in the Unaudited Consolidated Statements of Income. (3) The pre-tax amounts are included in other expenses in the Unaudited Consolidated Statements of Income. The following tables present the changes in accumulated other comprehensive income (loss) by component, net of tax: (Dollars in thousands) Net Unrealized (Losses) Gains on Available For Sale Debt Securities Net Unrealized (Losses) Gains on Cash Flow Hedges Defined Benefit Pension Plan Adjustment Total For the three months ended June 30, 2019 Balance at April 1, 2019 ($5,741 ) ($251 ) ($11,511 ) ($17,503 ) Other comprehensive income (loss) before reclassifications 5,972 (630 ) — 5,342 Amounts reclassified from accumulated other comprehensive income 61 8 226 295 Net other comprehensive income (loss) 6,033 (622 ) 226 5,637 Balance at June 30, 2019 $292 ($873 ) ($11,285 ) ($11,866 ) (Dollars in thousands) Net Unrealized (Losses) Gains on Available For Sale Debt Securities Net Unrealized Gains (Losses) on Cash Flow Hedges Defined Benefit Pension Plan Adjustment Total For the six months ended June 30, 2019 Balance at January 1, 2019 ($16,762 ) $191 ($11,738 ) ($28,309 ) Other comprehensive income (loss) before reclassifications 16,993 (1,048 ) — 15,945 Amounts reclassified from accumulated other comprehensive income 61 (16 ) 453 498 Net other comprehensive income (loss) 17,054 (1,064 ) 453 16,443 Balance at June 30, 2019 $292 ($873 ) ($11,285 ) ($11,866 ) (Dollars in thousands) Net Unrealized Losses on Available For Sale Debt Securities Net Unrealized Gains on Cash Flow Hedges Defined Benefit Pension Plan Adjustment Total For the three months ended June 30, 2018 Balance at April 1, 2018 ($17,948 ) $461 ($15,188 ) ($32,675 ) Other comprehensive (loss) income before reclassifications (3,112 ) 348 — (2,764 ) Amounts reclassified from accumulated other comprehensive income — 17 360 377 Net other comprehensive (loss) income (3,112 ) 365 360 (2,387 ) Balance at June 30, 2018 ($21,060 ) $826 ($14,828 ) ($35,062 ) (Dollars in thousands) Net Unrealized Losses on Available For Sale Debt Securities Net Unrealized (Losses) Gains on Cash Flow Hedges Defined Benefit Pension Plan Adjustment Total For the six months ended June 30, 2018 Balance at January 1, 2018 ($7,534 ) ($428 ) ($15,548 ) ($23,510 ) Other comprehensive (loss) income before reclassifications (13,526 ) 1,060 — (12,466 ) Amounts reclassified from accumulated other comprehensive income — 194 720 914 Net other comprehensive (loss) income (13,526 ) 1,254 720 (11,552 ) Balance at June 30, 2018 ($21,060 ) $826 ($14,828 ) ($35,062 )

Earnings Per Common Share

Earnings Per Common Share	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Earnings Per Common Share	Earnings per Common Share The following table presents the calculation of earnings per common share: (Dollars and shares in thousands, except per share amounts) Three Months Six Months Periods ended June 30, 2019 2018 2019 2018 Earnings per common share - basic: Net income $17,273 $17,674 $34,768 $33,885 Less dividends and undistributed earnings allocated to participating securities (35 ) (38 ) (69 ) (76 ) Net income available to common shareholders $17,238 $17,636 $34,699 $33,809 Weighted average common shares 17,330 17,272 17,317 17,253 Earnings per common share - basic $0.99 $1.02 $2.00 $1.96 Earnings per common share - diluted: Net income $17,273 $17,674 $34,768 $33,885 Less dividends and undistributed earnings allocated to participating securities (35 ) (38 ) (69 ) (76 ) Net income available to common shareholders $17,238 $17,636 $34,699 $33,809 Weighted average common shares 17,330 17,272 17,317 17,253 Dilutive effect of common stock equivalents 75 115 86 131 Weighted average diluted common shares 17,405 17,387 17,403 17,384 Earnings per common share - diluted $0.99 $1.01 $1.99 $1.94 Weighted average common stock equivalents, not included in common stock equivalents above because they were anti-dilutive, totaled 87,950 and 87,863 , respectively for the three and six months ended June 30, 2019 , compared to 43,871 and 48,956 , respectively, for the same periods in 2018 .

Leases

Leases	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Leases	Leases The Corporation has committed to rent premises used in business operations under non-cancelable operating leases and determines if an arrangement meets the definition of a lease upon inception. The Corporation adopted the provisions of ASU 2016-02 (Topic 842) on January 1, 2019. Operating lease right-of-use (“ROU”) assets represent a right to use an underlying asset for the contractual lease term. Operating lease liabilities represent an obligation to make lease payments arising from the lease. Upon adoption, operating lease ROU assets totaling $28.9 million and operating lease liabilities totaling $30.9 million were recognized in our Unaudited Consolidated Balance Sheets for leases that existed at the adoption date, based on the present value of lease payments over the remaining lease term. Operating leases entered into after the adoption date will be recognized as an operating lease ROU asset and operating lease liability at the commencement date of the new lease. The Corporation’s leases do not provide an implicit interest rate, therefore the Corporation used its incremental collateralized borrowing rates commensurate with the underlying lease terms to determine the present value of operating lease liabilities. The weighted average discount rate used to discount operating lease liabilities at June 30, 2019 was 3.66% . The Corporation’s operating lease agreements contain both lease and non-lease components, which are generally accounted for separately. The Corporation’s lease agreements do not contain any residual value guarantees. Operating leases with terms of 12 months or less are included in ROU assets and operating lease liabilities recorded in the Corporation’s Unaudited Consolidated Balance Sheets. Operating lease terms include options to extend when it is reasonably certain that the Corporation will exercise such options, determined on a lease-by-lease basis. As of June 30, 2019 , the Corporation does not have any leases that have not yet commenced. At June 30, 2019 , lease expiration dates ranged from 3 months to 22 years, with additional renewal options on certain leases ranging from 1 to 5 years. At June 30, 2019 , the weighted average remaining lease term for the Corporation’s operating leases was 14.2 years. Rental expense for operating leases is recognized on a straight-line basis over the lease term and amounted to $940 thousand and $1.9 million , respectively, for the three and six months ended June 30, 2019 , compared to $938 thousand and $1.9 million , respectively, for the same periods in 2018 . Variable lease components, such as consumer price index adjustments, are expensed as incurred and not included in ROU assets and operating lease liabilities. The following table presents the undiscounted annual lease payments under the terms of the Corporation’s operating leases at June 30, 2019 , including a reconciliation to the present value of operating lease liabilities recognized in the Corporation’s Unaudited Consolidated Balance Sheets: (Dollars in thousands) July 1, 2019 to December 31, 2019 $1,856 2020 3,515 2021 3,312 2022 3,165 2023 3,090 2024 and thereafter 24,716 Total operating lease payments (1) 39,654 Less interest 9,444 Present value of operating lease liabilities (2) $30,210 (1) Includes $4.2 million related to options to extend lease terms that are reasonably certain of being exercised. (2) Includes short-term operating lease liabilities of $2.5 million . The following table presents the components of total lease expense and operating cash flows: (Dollars in thousands) Periods ended June 30, 2019 Three Months Six Months Lease Expense: Operating lease expense $928 $1,856 Variable lease expense 12 23 Total lease expense (1) $940 $1,879 Cash Paid: Cash paid reducing operating lease liabilities $831 $1,751 (1) Included in net occupancy expenses in the Unaudited Consolidated Income Statement. The following table presents the minimum annual lease payments under the terms of these leases, exclusive of renewal provisions at December 31, 2018 : (Dollars in thousands) Years ending December 31: 2019 $3,544 2020 2,980 2021 2,677 2022 2,293 2023 2,059 2024 and thereafter 22,648 Total minimum lease payments $36,201 At December 31, 2018 , lease expiration dates ranged from 5 months to 22 years, with additional renewal options on certain leases ranging from 1 to 5 years.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Financial Instruments with Off-Balance Sheet Risk The Corporation is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers and to manage the Corporation’s exposure to fluctuations in interest rates. These financial instruments include commitments to extend credit, standby letters of credit, forward loan commitments, loan related derivative contracts and interest rate risk management contracts. These instruments involve, to varying degrees, elements of credit risk in excess of the amount recognized in the Corporation’s Unaudited Consolidated Balance Sheets. The contract or notional amounts of these instruments reflect the extent of involvement the Corporation has in particular classes of financial instruments. The Corporation’s credit policies with respect to interest rate swap agreements with commercial borrowers, commitments to extend credit and financial guarantees are similar to those used for loans. The interest rate swaps with other counterparties are generally subject to bilateral collateralization terms. The following table presents the contractual and notional amounts of financial instruments with off-balance sheet risk: (Dollars in thousands) Jun 30, Dec 31, Financial instruments whose contract amounts represent credit risk: Commitments to extend credit: Commercial loans $480,851 $533,884 Home equity lines 285,601 270,462 Other loans 87,343 46,698 Standby letters of credit 9,189 7,706 Financial instruments whose notional amounts exceed the amount of credit risk: Forward loan commitments: Interest rate lock commitments 89,682 30,766 Forward sale commitments 149,404 61,993 Loan related derivative contracts: Interest rate swaps with customers 678,865 648,050 Mirror swaps with counterparties 678,865 648,050 Risk participation-in agreements 46,205 46,510 Foreign exchange contracts 2,763 2,784 Interest rate risk management contracts: Interest rate swaps 60,000 60,000 See Note 9 for additional disclosure pertaining to derivative financial instruments. Commitments to Extend Credit Commitments to extend credit are agreements to lend to a customer as long as there are no violations of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since some of the commitments are expected to expire without being drawn upon, total commitment amounts do not necessarily represent future cash requirements. Each borrower’s creditworthiness is evaluated on a case-by-case basis. The amount of collateral obtained is based on management’s credit evaluation of the borrower. Standby Letters of Credit Standby letters of credit are conditional commitments issued to guarantee the performance of a customer to a third party. These standby letters of credit are primarily issued to support the financing needs of the Bank’s commercial customers. The credit risk involved in issuing standby letters of credit is essentially the same as that involved in extending loan facilities to customers. The collateral supporting those commitments is essentially the same as for other commitments. Most standby letters of credit extend for one year. The maximum potential amount of undiscounted future payments, not reduced by amounts that may be recovered totaled $9.2 million and $7.7 million , respectively, as of June 30, 2019 and December 31, 2018 . At June 30, 2019 and December 31, 2018 , there were no liabilities to beneficiaries resulting from standby letters of credit. Fee income on standby letters of credit was insignificant for the three and six months ended June 30, 2019 and 2018 . Forward Loan Commitments Interest rate lock commitments are extended to borrowers and relate to the origination of mortgage loans held for sale. To mitigate the interest rate risk and pricing risk associated with these rate locks and mortgage loans held for sale, the Corporation enters into forward sale commitments. Both interest rate lock commitments and forward sale commitments are derivative financial instruments.

Basis of Presentation (Policies

Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Consolidation	The Unaudited Consolidated Financial Statements include the accounts of the Bancorp and its subsidiaries (collectively the “Corporation” or “Washington Trust”). All intercompany balances and transactions have been eliminated. Certain previously reported amounts have been reclassified to conform to current year’s presentation. The Bancorp also owns the common stock of two capital trusts, which have issued trust preferred securities. These capital trusts are variable interest entities in which the Bancorp is not the primary beneficiary and, therefore, are not consolidated. The capital trust’s only assets are junior subordinated debentures issued by the Bancorp, which were acquired by the capital trusts using the proceeds from the issuance of the trust preferred securities and common stock. The Bancorp’s equity interest in the capital trusts, classified in other assets, and the junior subordinated debentures are included in the Unaudited Consolidated Balance Sheets. Interest expense on the junior subordinated debentures is included in the Unaudited Consolidated Statements of Income.
Basis of Accounting	The accounting and reporting policies of the Corporation conform to accounting principles generally accepted in the United States of America (“GAAP”) and to general practices of the banking industry.
Use of Estimates	In preparing the financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheet and revenues and expenses for the period. Actual results could differ from those estimates.

Leases (Policies)

Leases (Policies)	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Leases	The Corporation has committed to rent premises used in business operations under non-cancelable operating leases and determines if an arrangement meets the definition of a lease upon inception. The Corporation adopted the provisions of ASU 2016-02 (Topic 842) on January 1, 2019. Operating lease right-of-use (“ROU”) assets represent a right to use an underlying asset for the contractual lease term. Operating lease liabilities represent an obligation to make lease payments arising from the lease. Upon adoption, operating lease ROU assets totaling $28.9 million and operating lease liabilities totaling $30.9 million were recognized in our Unaudited Consolidated Balance Sheets for leases that existed at the adoption date, based on the present value of lease payments over the remaining lease term. Operating leases entered into after the adoption date will be recognized as an operating lease ROU asset and operating lease liability at the commencement date of the new lease. The Corporation’s leases do not provide an implicit interest rate, therefore the Corporation used its incremental collateralized borrowing rates commensurate with the underlying lease terms to determine the present value of operating lease liabilities. The weighted average discount rate used to discount operating lease liabilities at June 30, 2019 was 3.66% . The Corporation’s operating lease agreements contain both lease and non-lease components, which are generally accounted for separately. The Corporation’s lease agreements do not contain any residual value guarantees. Operating leases with terms of 12 months or less are included in ROU assets and operating lease liabilities recorded in the Corporation’s Unaudited Consolidated Balance Sheets. Operating lease terms include options to extend when it is reasonably certain that the Corporation will exercise such options, determined on a lease-by-lease basis. As of June 30, 2019 , the Corporation does not have any leases that have not yet commenced. At June 30, 2019 , lease expiration dates ranged from 3 months to 22 years, with additional renewal options on certain leases ranging from 1 to 5 years. At June 30, 2019 , the weighted average remaining lease term for the Corporation’s operating leases was 14.2 years. Rental expense for operating leases is recognized on a straight-line basis over the lease term and amounted to $940 thousand and $1.9 million , respectively, for the three and six months ended June 30, 2019 , compared to $938 thousand and $1.9 million , respectively, for the same periods in 2018 . Variable lease components, such as consumer price index adjustments, are expensed as incurred and not included in ROU assets and operating lease liabilities.

Securities (Tables)

Securities (Tables)	6 Months Ended
	Jun. 30, 2019
Investments, Debt and Equity Securities [Abstract]
Summary of Investments	The following tables present the amortized cost, gross unrealized holding gains, gross unrealized holding losses and fair value of securities by major security type and class of security: (Dollars in thousands) June 30, 2019 Amortized Cost Unrealized Gains Unrealized Losses Fair Value Available for Sale Debt Securities: Obligations of U.S. government-sponsored enterprises $236,726 $1,005 ($304 ) $237,427 Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 704,940 6,722 (4,482 ) 707,180 Obligations of states and political subdivisions 90 — — 90 Individual name issuer trust preferred debt securities 13,315 — (1,014 ) 12,301 Corporate bonds 13,713 25 (1,568 ) 12,170 Total available for sale debt securities $968,784 $7,752 ($7,368 ) $969,168 Total securities $968,784 $7,752 ($7,368 ) $969,168 (Dollars in thousands) December 31, 2018 Amortized Cost Unrealized Gains Unrealized Losses Fair Value Available for Sale Debt Securities: Obligations of U.S. government-sponsored enterprises $246,708 $442 ($4,467 ) $242,683 Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 675,368 1,943 (16,518 ) 660,793 Obligations of states and political subdivisions 935 2 — 937 Individual name issuer trust preferred debt securities 13,307 — (1,535 ) 11,772 Corporate bonds 13,402 — (1,777 ) 11,625 Total available for sale debt securities $949,720 $2,387 ($24,297 ) $927,810 Held to Maturity Debt Securities: Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises $10,415 $— ($99 ) $10,316 Total held to maturity debt securities $10,415 $— ($99 ) $10,316 Total securities $960,135 $2,387 ($24,396 ) $938,126
Securities by Contractual Maturity	The schedule of maturities of available for sale debt securities is presented below. Mortgage-backed securities are included based on weighted average maturities, adjusted for anticipated prepayments. All other debt securities are included based on contractual maturities. Actual maturities may differ from amounts presented because certain issuers have the right to call or prepay obligations with or without call or prepayment penalties. (Dollars in thousands) Available for Sale June 30, 2019 Amortized Cost Fair Value Due in one year or less $106,685 $106,963 Due after one year to five years 361,981 362,982 Due after five years to ten years 334,575 334,065 Due after ten years 165,543 165,158 Total debt securities $968,784 $969,168
Securities in a Continuous Unrealized Loss Position	The following tables summarize temporarily impaired securities, segregated by length of time the securities have been in a continuous unrealized loss position: (Dollars in thousands) Less than 12 Months 12 Months or Longer Total June 30, 2019 # Fair Unrealized # Fair Value Unrealized Losses # Fair Value Unrealized Losses Obligations of U.S. government-sponsored enterprises — $— $— 5 $60,697 ($304 ) 5 $60,697 ($304 ) Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises — — — 35 295,954 (4,482 ) 35 295,954 (4,482 ) Individual name issuer trust preferred debt securities — — — 5 12,301 (1,014 ) 5 12,301 (1,014 ) Corporate bonds — — — 4 10,432 (1,568 ) 4 10,432 (1,568 ) Total temporarily impaired securities — $— $— 49 $379,384 ($7,368 ) 49 $379,384 ($7,368 ) (Dollars in thousands) Less than 12 Months 12 Months or Longer Total December 31, 2018 # Fair Value Unrealized Losses # Fair Value Unrealized Losses # Fair Value Unrealized Losses Obligations of U.S. government-sponsored enterprises — $— $— 16 $157,032 ($4,467 ) 16 $157,032 ($4,467 ) Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 10 47,060 (439 ) 51 438,701 (16,178 ) 61 485,761 (16,617 ) Individual name issuer trust preferred debt securities — — — 5 11,772 (1,535 ) 5 11,772 (1,535 ) Corporate bonds 3 1,198 (9 ) 5 10,427 (1,768 ) 8 11,625 (1,777 ) Total temporarily impaired securities 13 $48,258 ($448 ) 77 $617,932 ($23,948 ) 90 $666,190 ($24,396 )
Schedule of Realized Gain (Loss)	The following table summarizes amounts relating to sales of securities: (Dollars in thousands) Three Months Six Months For the periods ended June 30, 2019 2018 2019 2018 Proceeds from sales $9,920 $— $9,920 $— Gross realized gains $— $— $— $— Gross realized losses (80 ) — (80 ) — Net realized losses on securities ($80 ) $— ($80 ) $—

Loans (Tables)

Loans (Tables)	6 Months Ended
	Jun. 30, 2019
Receivables [Abstract]
Summary of Loans	The following is a summary of loans: (Dollars in thousands) June 30, December 31, 2018 Commercial: Commercial real estate (1) $1,482,836 $1,392,408 Commercial & industrial (2) 583,873 620,704 Total commercial 2,066,709 2,013,112 Residential Real Estate: Residential real estate (3) 1,352,113 1,360,387 Consumer: Home equity 288,078 280,626 Other (4) 23,439 26,235 Total consumer 311,517 306,861 Total loans (5) $3,730,339 $3,680,360 (1) Consists of commercial mortgages primarily secured by income-producing property, as well as construction and development loans. Construction and development loans are made to businesses for land development or the on-site construction of industrial, commercial, or residential buildings. (2) Consists of loans to businesses and individuals, a substantial portion of which are fully or partially collateralized by real estate. (3) Consists of mortgage and homeowner construction loans secured by one- to four-family residential properties. (4) Consists of loans to individuals secured by general aviation aircraft and other personal installment loans. (5) Includes net unamortized loan origination costs of $5.3 million and $4.7 million , respectively, at June 30, 2019 and December 31, 2018 and net unamortized premiums on purchased loans of $609 thousand and $703 thousand , respectively, at June 30, 2019 and December 31, 2018 .
Past Due Loans	The following tables present an age analysis of past due loans, segregated by class of loans: (Dollars in thousands) Days Past Due June 30, 2019 30-59 60-89 Over 90 Total Past Due Current Total Loans Commercial: Commercial real estate $2,744 $— $926 $3,670 $1,479,166 $1,482,836 Commercial & industrial 1 — — 1 583,872 583,873 Total commercial 2,745 — 926 3,671 2,063,038 2,066,709 Residential Real Estate: Residential real estate 4,006 2,758 4,473 11,237 1,340,876 1,352,113 Consumer: Home equity 1,763 351 790 2,904 285,174 288,078 Other 13 1 88 102 23,337 23,439 Total consumer 1,776 352 878 3,006 308,511 311,517 Total loans $8,527 $3,110 $6,277 $17,914 $3,712,425 $3,730,339 (Dollars in thousands) Days Past Due December 31, 2018 30-59 60-89 Over 90 Total Past Due Current Total Loans Commercial: Commercial real estate $155 $925 $— $1,080 $1,391,328 $1,392,408 Commercial & industrial — — — — 620,704 620,704 Total commercial 155 925 — 1,080 2,012,032 2,013,112 Residential Real Estate: Residential real estate 6,318 2,693 1,509 10,520 1,349,867 1,360,387 Consumer: Home equity 1,281 156 552 1,989 278,637 280,626 Other 33 — — 33 26,202 26,235 Total consumer 1,314 156 552 2,022 304,839 306,861 Total loans $7,787 $3,774 $2,061 $13,622 $3,666,738 $3,680,360
Impaired Loans	The following is a summary of impaired loans: (Dollars in thousands) Recorded Investment (1) Unpaid Principal Related Allowance Jun 30, Dec 31, Jun 30, Dec 31, Jun 30, Dec 31, No Related Allowance Recorded Commercial: Commercial real estate $926 $925 $926 $926 $— $— Commercial & industrial — 4,681 — 4,732 — — Total commercial 926 5,606 926 5,658 — — Residential Real Estate: Residential real estate 9,825 9,347 10,662 9,695 — — Consumer: Home equity 1,224 1,360 1,224 1,360 — — Other 88 — 88 — — — Total consumer 1,312 1,360 1,312 1,360 — — Subtotal 12,063 16,313 12,900 16,713 — — With Related Allowance Recorded Commercial: Commercial real estate $— $— $— $— $— $— Commercial & industrial — 52 — 73 — — Total commercial — 52 — 73 — — Residential Real Estate: Residential real estate 1,145 364 1,171 390 97 100 Consumer: Home equity 21 85 21 85 20 24 Other 19 22 19 22 2 3 Total consumer 40 107 40 107 22 27 Subtotal 1,185 523 1,211 570 119 127 Total impaired loans $13,248 $16,836 $14,111 $17,283 $119 $127 Total: Commercial $926 $5,658 $926 $5,731 $— $— Residential real estate 10,970 9,711 11,833 10,085 97 100 Consumer 1,352 1,467 1,352 1,467 22 27 Total impaired loans $13,248 $16,836 $14,111 $17,283 $119 $127 (1) The recorded investment in impaired loans consists of unpaid principal balance, net of charge-offs, interest payments received applied to principal and unamortized deferred loan origination fees and costs. For accruing impaired loans (troubled debt restructurings for which management has concluded that the collectibility of the loan is not in doubt), the recorded investment also includes accrued interest. The following tables present the average recorded investment balance of impaired loans and interest income recognized on impaired loans segregated by loan class. (Dollars in thousands) Average Recorded Investment Interest Income Recognized Three months ended June 30, 2019 2018 2019 2018 Commercial: Commercial real estate $926 $— $— $— Commercial & industrial 3,868 5,983 49 73 Total commercial 4,794 5,983 49 73 Residential Real Estate: Residential real estate 10,728 10,017 107 85 Consumer: Home equity 1,332 1,036 13 10 Other 35 88 — 2 Total consumer 1,367 1,124 13 12 Totals $16,889 $17,124 $169 $170 (Dollars in thousands) Average Recorded Investment Interest Income Recognized Six months ended June 30, 2019 2018 2019 2018 Commercial: Commercial real estate $951 $2,039 $1 $— Commercial & industrial 4,276 5,738 103 139 Total commercial 5,227 7,777 104 139 Residential Real Estate: Residential real estate 10,441 9,934 222 197 Consumer: Home equity 1,406 853 27 19 Other 28 116 — 5 Total consumer 1,434 969 27 24 Totals $17,102 $18,680 $353 $360
Nonaccrual Loans	The following is a summary of nonaccrual loans, segregated by class of loans: (Dollars in thousands) Jun 30, Dec 31, Commercial: Commercial real estate $926 $925 Commercial & industrial — — Total commercial 926 925 Residential Real Estate: Residential real estate 10,610 9,346 Consumer: Home equity 1,243 1,436 Other 88 — Total consumer 1,331 1,436 Total nonaccrual loans $12,867 $11,707 Accruing loans 90 days or more past due $— $—
Credit Quality Indicators Commercial	The following table presents the commercial loan portfolio, segregated by category of credit quality indicator: (Dollars in thousands) Pass Special Mention Classified Jun 30, Dec 31, Jun 30, Dec 31, Jun 30, Dec 31, Commercial: Commercial real estate $1,460,537 $1,387,666 $17,587 $205 $4,712 $4,537 Commercial & industrial 546,188 559,019 22,234 50,426 15,451 11,259 Total commercial $2,006,725 $1,946,685 $39,821 $50,631 $20,163 $15,796
Credit Quality Indicators Residential & Consumer	The following table presents the residential and consumer loan portfolios, segregated by loan type and credit quality indicator: (Dollars in thousands) Current Past Due Jun 30, Dec 31, Jun 30, Dec 31, Residential Real Estate: Self-originated mortgages $1,239,272 $1,238,402 $10,141 $9,079 Purchased mortgages 101,604 111,465 1,096 1,441 Total residential real estate $1,340,876 $1,349,867 $11,237 $10,520 Consumer: Home equity $285,174 $278,637 $2,904 $1,989 Other 23,337 26,202 102 33 Total consumer $308,511 $304,839 $3,006 $2,022

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	6 Months Ended
	Jun. 30, 2019
Receivables [Abstract]
Allowance for Loan Losses Rollforward Analysis	The following table presents the activity in the allowance for loan losses for the three months ended June 30, 2019 : (Dollars in thousands) Commercial Consumer CRE (1) C&I (2) Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $17,191 $4,498 $21,689 $4,009 $1,589 $357 $1,946 $27,644 Charge-offs — (4 ) (4 ) (486 ) (311 ) (18 ) (329 ) (819 ) Recoveries — 20 20 — 22 6 28 48 Provision (309 ) (61 ) (370 ) 1,334 (387 ) (52 ) (439 ) 525 Ending Balance $16,882 $4,453 $21,335 $4,857 $913 $293 $1,206 $27,398 (1) Commercial real estate loans. (2) Commercial & industrial loans. The following table presents the activity in the allowance for loan losses for the six months ended June 30, 2019 : (Dollars in thousands) Commercial Consumer CRE (1) C&I (2) Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $15,381 $5,847 $21,228 $3,987 $1,603 $254 $1,857 $27,072 Charge-offs — (18 ) (18 ) (486 ) (372 ) (46 ) (418 ) (922 ) Recoveries — 28 28 — 35 10 45 73 Provision 1,501 (1,404 ) 97 1,356 (353 ) 75 (278 ) 1,175 Ending Balance $16,882 $4,453 $21,335 $4,857 $913 $293 $1,206 $27,398 (1) Commercial real estate loans. (2) Commercial & industrial loans. The following table presents the activity in the allowance for loan losses for the three months ended June 30, 2018 : (Dollars in thousands) Commercial Consumer CRE (1) C&I (2) Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $11,819 $5,871 $17,690 $5,494 $2,192 $488 $2,680 $25,864 Charge-offs — (1 ) (1 ) (5 ) (76 ) (21 ) (97 ) (103 ) Recoveries — 4 4 — 3 6 9 13 Provision 624 768 1,392 (175 ) (744 ) (73 ) (817 ) 400 Ending Balance $12,443 $6,642 $19,085 $5,314 $1,375 $400 $1,775 $26,174 (1) Commercial real estate loans. (2) Commercial & industrial loans. The following table presents the activity in the allowance for loan losses for the six months ended June 30, 2018 : (Dollars in thousands) Commercial Consumer CRE (1) C&I (2) Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $12,729 $5,580 $18,309 $5,427 $2,412 $340 $2,752 $26,488 Charge-offs (627 ) (7 ) (634 ) (5 ) (111 ) (43 ) (154 ) (793 ) Recoveries 25 33 58 — 10 11 21 79 Provision 316 1,036 1,352 (108 ) (936 ) 92 (844 ) 400 Ending Balance $12,443 $6,642 $19,085 $5,314 $1,375 $400 $1,775 $26,174 (1) Commercial real estate loans. (2) Commercial & industrial loans.
Schedule of Allowance for Loan Loss by Segment & Impairment Methodology	The following table presents the Corporation’s loan portfolio and associated allowance for loan losses by portfolio segment and by impairment methodology: (Dollars in thousands) June 30, 2019 December 31, 2018 Loans Related Allowance Loans Related Allowance Loans Individually Evaluated for Impairment Commercial: Commercial real estate $926 $— $925 $— Commercial & industrial — — 4,714 — Total commercial 926 — 5,639 — Residential Real Estate: Residential real estate 10,969 97 9,710 100 Consumer: Home equity 1,245 20 1,445 24 Other 107 2 22 3 Total consumer 1,352 22 1,467 27 Subtotal 13,247 119 16,816 127 Loans Collectively Evaluated for Impairment Commercial: Commercial real estate 1,481,910 16,882 1,391,483 15,381 Commercial & industrial 583,873 4,453 615,990 5,847 Total commercial 2,065,783 21,335 2,007,473 21,228 Residential Real Estate: Residential real estate 1,341,144 4,760 1,350,677 3,887 Consumer: Home equity 286,833 893 279,182 1,579 Other 23,332 291 26,212 251 Total consumer 310,165 1,184 305,394 1,830 Subtotal 3,717,092 27,279 3,663,544 26,945 Total $3,730,339 $27,398 $3,680,360 $27,072

Federal Home Loan Bank Advance

Federal Home Loan Bank Advance (Tables)	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Federal Home Loan Bank Advances Maturities	The following table presents maturities and weighted average interest rates on FHLB advances outstanding as of June 30, 2019 : (Dollars in thousands) Scheduled Weighted Average Rate July 1, 2019 to December 31, 2019 $534,996 2.58 % 2020 369,533 2.39 2021 86,222 2.73 2022 55,447 3.65 2023 9,428 4.01 2024 and thereafter 5,334 5.06 Balance at June 30, 2019 $1,060,960 2.60 %

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	6 Months Ended
	Jun. 30, 2019
Regulatory Capital Requirements [Abstract]
Regulatory Capital Requirements	The following table presents the Corporation’s and the Bank’s actual capital amounts and ratios, as well as the corresponding minimum and well capitalized regulatory amounts and ratios that were in effect during the respective periods: (Dollars in thousands) Actual For Capital Adequacy Purposes To Be “Well Capitalized” Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio June 30, 2019 Total Capital (to Risk-Weighted Assets): Corporation $475,982 12.80 % $297,470 8.00 % N/A N/A Bank 473,515 12.74 297,426 8.00 $371,783 10.00 % Tier 1 Capital (to Risk-Weighted Assets): Corporation 448,282 12.06 223,102 6.00 N/A N/A Bank 445,815 11.99 223,070 6.00 297,426 8.00 Common Equity Tier 1 Capital (to Risk-Weighted Assets): Corporation 426,284 11.46 167,327 4.50 N/A N/A Bank 445,815 11.99 167,302 4.50 241,659 6.50 Tier 1 Capital (to Average Assets): (1) Corporation 448,282 8.76 204,811 4.00 N/A N/A Bank 445,815 8.71 204,724 4.00 255,906 5.00 December 31, 2018 Total Capital (to Risk-Weighted Assets): Corporation 455,699 12.56 290,146 8.00 N/A N/A Bank 453,033 12.49 290,128 8.00 362,660 10.00 Tier 1 Capital (to Risk-Weighted Assets): Corporation 428,338 11.81 217,609 6.00 N/A N/A Bank 425,672 11.74 217,596 6.00 290,128 8.00 Common Equity Tier 1 Capital (to Risk-Weighted Assets): Corporation 406,340 11.20 163,207 4.50 N/A N/A Bank 425,672 11.74 163,197 4.50 235,729 6.50 Tier 1 Capital (to Average Assets): (1) Corporation 428,338 8.89 192,690 4.00 N/A N/A Bank 425,672 8.84 192,652 4.00 240,815 5.00 (1) Leverage ratio.

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Value of Derivatives by Balance Sheet Location	The following table presents the fair values of derivative instruments in the Corporation’s Unaudited Consolidated Balance Sheets: (Dollars in thousands) Asset Derivatives Liability Derivatives Fair Value Fair Value Balance Sheet Location Jun 30, 2019 Dec 31, 2018 Balance Sheet Location Jun 30, 2019 Dec 31, 2018 Derivatives Designated as Cash Flow Hedging Instruments: Interest rate risk management contracts: Interest rate caps Other assets $— $20 Other liabilities $— $— Interest rate swaps Other assets 7 903 Other liabilities 724 — Interest rate floors Other assets 120 37 Other liabilities — — Derivatives not Designated as Hedging Instruments: Loan related derivative contracts: Interest rate swaps with customers Other assets 25,857 5,340 Other liabilities 429 7,719 Mirror swaps with counterparties Other assets 420 7,592 Other liabilities 25,955 5,392 Risk participation agreements Other assets 1 — Other liabilities 1 — Foreign exchange contracts Other assets 4 — Other liabilities — 7 Forward loan commitments: Interest rate lock commitments Other assets 2,102 806 Other liabilities — — Forward sale commitments Other assets 23 — Other liabilities 1,560 816 Gross amounts 28,534 14,698 28,669 13,934 Less amounts offset in Consolidated Balance Sheets (1) 551 10,732 551 10,732 Net amounts presented in Consolidated Balance Sheets 27,983 3,966 28,118 3,202 Less collateral pledged (2) — — 25,303 1,460 Net amounts $27,983 $3,966 $2,815 $1,742 (1) Interest rate risk management contracts and loan related derivative contracts with counterparties are subject to master netting arrangements. (2) Collateral pledged to derivative counterparties is in the form of cash. Washington Trust may need to post additional collateral in the future in proportion to potential increases in unrealized loss positions.
Derivative Instruments Effect in Statements of Income and Changes in Shareholders' Equity	The following tables present the effect of derivative instruments in the Corporation’s Unaudited Consolidated Statements of Changes in Shareholders’ Equity and Unaudited Consolidated Statements of Income: (Dollars in thousands) Gain (Loss) Recognized in Other Comprehensive Income, Net of Tax Three Months Six Months Periods ended June 30, 2019 2018 2019 2018 Derivatives Designated as Cash Flow Hedging Instruments: Interest rate risk management contracts: Interest rate caps $14 $11 $14 $49 Interest rate swaps (765 ) 294 (1,231 ) 1,133 Interest rate floors 129 60 153 72 Total ($622 ) $365 ($1,064 ) $1,254 See Note 15 for additional disclosure pertaining to the amounts reclassified from accumulated other comprehensive income into earnings for derivatives designated as cash flow hedging instruments. (Dollars in thousands) Amount of Gain (Loss) Recognized in Income on Derivatives Three Months Six Months Periods ended June 30, Statement of Income Location 2019 2018 2019 2018 Derivatives not Designated as Hedging Instruments: Loan related derivative contracts: Interest rate swaps with customers Loan related derivative income $16,974 ($3,001 ) 27,284 (12,196 ) Mirror swaps with counterparties Loan related derivative income (16,246 ) 3,645 (25,850 ) 12,969 Risk participation agreements Loan related derivative income — — — — Foreign exchange contracts Loan related derivative income 18 24 36 36 Forward loan commitments: Interest rate lock commitments Mortgage banking revenues 610 191 $1,295 $177 Forward sale commitments Mortgage banking revenues (1,439 ) (82 ) (1,868 ) 1,236 Total ($83 ) $777 $897 $2,222

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Fair value of Mortgage Loans Held for Sale	The following table presents a summary of mortgage loans held for sale accounted for under the fair value option: (Dollars in thousands) June 30, December 31, Aggregate fair value $39,996 $20,996 Aggregate principal balance 38,953 20,498 Difference between fair value and principal balance $1,043 $498
Items Recorded at Fair Value on a Recurring Basis	The following tables present the balances of assets and liabilities reported at fair value on a recurring basis: (Dollars in thousands) Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) June 30, 2019 Assets: Available for sale debt securities: Obligations of U.S. government-sponsored enterprises $237,427 $— $237,427 $— Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 707,180 — 707,180 — Obligations of states and political subdivisions 90 — 90 — Individual name issuer trust preferred debt securities 12,301 — 12,301 — Corporate bonds 12,170 — 12,170 — Mortgage loans held for sale 39,996 — 39,996 — Derivative assets 27,983 — 27,983 — Total assets at fair value on a recurring basis $1,037,147 $— $1,037,147 $— Liabilities: Derivative liabilities $28,118 $— $28,118 $— Total liabilities at fair value on a recurring basis $28,118 $— $28,118 $— (Dollars in thousands) Total Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs December 31, 2018 Assets: Available for sale debt securities: Obligations of U.S. government-sponsored enterprises $242,683 $— $242,683 $— Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 660,793 — 660,793 — Obligations of states and political subdivisions 937 — 937 — Individual name issuer trust preferred debt securities 11,772 — 11,772 — Corporate bonds 11,625 — 11,625 — Mortgage loans held for sale 20,996 — 20,996 — Derivative assets 3,966 — 3,966 — Total assets at fair value on a recurring basis $952,772 $— $952,772 $— Liabilities: Derivative liabilities $3,202 $— $3,202 $— Total liabilities at fair value on a recurring basis $3,202 $— $3,202 $—
Items Recorded at Fair Value on a Nonrecurring Basis	The following table presents the carrying value of assets held at June 30, 2019 , which were written down to fair value during the six months ended June 30, 2019 : (Dollars in thousands) Total Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Assets: Collateral dependent impaired loans $768 $— $— $768 Total assets at fair value on a nonrecurring basis $768 $— $— $768 The allowance for loan losses on collateral dependent impaired loans amounted to $20 thousand at June 30, 2019 . The following table presents the carrying value of assets held at December 31, 2018 , which were written down to fair value during the year ended December 31, 2018 : (Dollars in thousands) Total Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Assets: Collateral dependent impaired loans $883 $— $— $883 Property acquired through foreclosure or repossession 2,142 — — 2,142 Total assets at fair value on a nonrecurring basis $3,025 $— $— $3,025 The allowance for loan losses on collateral dependent impaired loans amounted to $24 thousand at December 31, 2018 .
Quantitative Information About Level 3 Assets Measured at Fair Value on a Nonrecurring Basis	The following tables present valuation techniques and unobservable inputs for assets measured at fair value on a nonrecurring basis for which the Corporation has utilized Level 3 inputs to determine fair value: (Dollars in thousands) Fair Value Valuation Technique Unobservable Input Range of Inputs Utilized (Weighted Average) June 30, 2019 Collateral dependent impaired loans $768 Appraisals of collateral Discount for costs to sell 0% - 12% (12%) Appraisal adjustments (1) 0% - 100% (16%) (1) Management may adjust appraisal values to reflect market value declines or other discounts resulting from its knowledge of the property. (Dollars in thousands) Fair Value Valuation Technique Unobservable Input Range of Inputs Utilized (Weighted Average) December 31, 2018 Collateral dependent impaired loans $883 Appraisals of collateral Discount for costs to sell 0% - 10% (10%) Appraisal adjustments (1) 0% - 100% (2%) Property acquired through foreclosure or repossession $2,142 Appraisals of collateral Discount for costs to sell 13% Appraisal adjustments (1) 12% - 28% (20%) (1) Management may adjust appraisal values to reflect market value declines or other discounts resulting from its knowledge of the property.
Carrying Amounts and Estimated Fair Values of Financial Instruments	The estimated fair values and related carrying amounts for financial instruments for which fair value is only disclosed are presented below as of the periods indicated. The tables exclude financial instruments for which the carrying value approximates fair value such as cash and cash equivalents, FHLB stock, accrued interest receivable, bank-owned life insurance, non-maturity deposits and accrued interest payable. (Dollars in thousands) June 30, 2019 Carrying Amount Total Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Financial Assets: Loans, net of allowance for loan losses $3,702,941 $3,693,614 $— $— $3,693,614 Financial Liabilities: Time deposits $1,284,538 $1,302,002 $— $1,302,002 $— FHLB advances 1,060,960 1,066,411 — 1,066,411 — Junior subordinated debentures 22,681 19,457 — 19,457 — (Dollars in thousands) December 31, 2018 Carrying Amount Total Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Financial Assets: Held to maturity debt securities $10,415 $10,316 $— $10,316 $— Loans, net of allowance for loan losses 3,653,288 3,598,025 — — 3,598,025 Financial Liabilities: Time deposits $1,255,108 $1,269,433 $— $1,269,433 $— FHLB advances 950,722 950,691 — 950,691 — Junior subordinated debentures 22,681 19,226 — 19,226 —

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	6 Months Ended
	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following tables summarize total revenues as presented in the Unaudited Consolidated Statements of Income and the related amounts which are from contracts with customers within the scope of Topic 606. As shown below, a substantial portion of our revenues are specifically excluded from the scope of Topic 606. For the three months ended June 30, 2019 2018 (Dollars in thousands) As reported in Consolidated Statements of Income Revenue from contracts in scope of Topic 606 As reported in Consolidated Statements of Income Revenue from contracts in scope of Topic 606 Net interest income $33,858 $— $33,111 $— Noninterest income: Asset-based wealth management revenues 9,141 9,141 9,136 9,136 Transaction-based wealth management revenues 408 408 466 466 Total wealth management revenues 9,549 9,549 9,602 9,602 Mortgage banking revenues 3,640 — 2,941 — Card interchange fees 1,018 1,018 961 961 Service charges on deposit accounts 929 929 903 903 Loan related derivative income 746 — 668 — Income from bank-owned life insurance 566 — 537 — Net realized losses on securities (80 ) — — — Other income 385 371 381 366 Total noninterest income 16,753 11,867 15,993 11,832 Total revenues $50,611 $11,867 $49,104 $11,832 For the six months ended June 30, 2019 2018 (Dollars in thousands) As reported in Consolidated Statements of Income Revenue from contracts in scope of Topic 606 As reported in Consolidated Statements of Income Revenue from contracts in scope of Topic 606 Net interest income $68,442 $— $64,963 $— Noninterest income: Asset-based wealth management revenues 18,062 18,062 19,091 19,091 Transaction-based wealth management revenues 739 739 784 784 Total wealth management revenues 18,801 18,801 19,875 19,875 Mortgage banking revenues 6,286 — 5,779 — Card interchange fees 2,015 2,015 1,808 1,808 Service charges on deposit accounts 1,804 1,804 1,766 1,766 Loan related derivative income 1,470 — 809 — Income from bank-owned life insurance 1,215 — 1,052 — Net realized losses on securities (80 ) — — — Other income 609 595 647 632 Total noninterest income 32,120 23,215 31,736 24,081 Total revenues $100,562 $23,215 $96,699 $24,081 The following table presents revenue from contracts with customers based on the timing of revenue recognition: (Dollars in thousands) Three Months Six Months Periods ended June 30, 2019 2018 2019 2018 Revenue recognized at a point in time: Card interchange fees $1,018 $961 $2,015 $1,808 Service charges on deposit accounts 719 703 1,381 1,375 Other income 324 248 503 474 Revenue recognized over time: Wealth management revenues 9,549 9,602 18,801 19,875 Service charges on deposit accounts 210 200 423 391 Other income 47 118 92 158 Total revenues from contracts in scope of Topic 606 $11,867 $11,832 $23,215 $24,081

Defined Benefit Pension Plans (

Defined Benefit Pension Plans (Tables)	6 Months Ended
	Jun. 30, 2019
Defined Benefit Plan [Abstract]
Components of Net Periodic Benefit Cost	The following table presents components of net periodic benefit cost and other amounts recognized in other comprehensive income (loss), on a pre-tax basis: (Dollars in thousands) Qualified Pension Plan Non-Qualified Retirement Plans Three Months Six Months Three Months Six Months Periods ended June 30, 2019 2018 2019 2018 2019 2018 2019 2018 Net Periodic Benefit Cost: Service cost (1) $509 $561 $1,018 $1,122 $32 $27 $63 $54 Interest cost (2) 742 678 1,484 1,357 141 118 282 237 Expected return on plan assets (2) (1,123 ) (1,318 ) (2,247 ) (2,636 ) — — — — Amortization of prior service credit (2) (4 ) (5 ) (8 ) (11 ) — — — — Recognized net actuarial loss (2) 198 374 396 748 101 103 203 205 Net periodic benefit cost $322 $290 $643 $580 $274 $248 $548 $496 (1) Included in salaries and employee benefits expense in the Unaudited Consolidated Statements of Income. (2) Included in other expenses in the Unaudited Consolidated Statements of Income.
Schedule of Assumptions Used for Net Periodic Benefit Cost	The following table presents the measurement date and weighted-average assumptions used to determine net periodic benefit cost: Qualified Pension Plan Non-Qualified Retirement Plans For the six months ended June 30, 2019 2018 2019 2018 Measurement date Dec 31, 2018 Dec 31, 2017 Dec 31, 2018 Dec 31, 2017 Equivalent single discount rate for benefit obligations 4.38% 3.69% 4.28% 3.58% Equivalent single discount rate for service cost 4.44 3.76 4.48 3.79 Equivalent single discount rate for interest cost 4.12 3.42 3.98 3.22 Expected long-term return on plan assets 5.75 6.75 N/A N/A Rate of compensation increase 3.75 3.75 3.75 3.75

Business Segments (Tables)

Business Segments (Tables)	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Statement of Operations and Total Assets by Reportable Segment	The following table presents the statement of operations and total assets for Washington Trust’s reportable segments: (Dollars in thousands) Commercial Banking Wealth Management Services Corporate Consolidated Total Three months ended June 30, 2019 2018 2019 2018 2019 2018 2019 2018 Net interest income (expense) $27,867 $26,644 ($120 ) ($77 ) $6,111 $6,544 $33,858 $33,111 Provision for loan losses 525 400 — — — — 525 400 Net interest income (expense) after provision for loan losses 27,342 26,244 (120 ) (77 ) 6,111 6,544 33,333 32,711 Noninterest income 6,690 5,837 9,557 9,602 506 554 16,753 15,993 Noninterest expenses: Depreciation and amortization expense 672 637 363 370 39 43 1,074 1,050 Other noninterest expenses 16,660 15,509 6,937 6,593 3,480 3,136 27,077 25,238 Total noninterest expenses 17,332 16,146 7,300 6,963 3,519 3,179 28,151 26,288 Income before income taxes 16,700 15,935 2,137 2,562 3,098 3,919 21,935 22,416 Income tax expense 3,603 3,387 582 655 477 700 4,662 4,742 Net income $13,097 $12,548 $1,555 $1,907 $2,621 $3,219 $17,273 $17,674 Total assets at period end $3,916,915 $3,647,649 $77,757 $68,009 $1,195,000 $1,021,584 $5,189,672 $4,737,242 Expenditures for long-lived assets 297 801 — 11 19 52 316 864 (Dollars in thousands) Commercial Banking Wealth Management Services Corporate Consolidated Total Six months ended June 30, 2019 2018 2019 2018 2019 2018 2019 2018 Net interest income (expense) $55,169 $52,620 ($247 ) ($135 ) $13,520 $12,478 $68,442 $64,963 Provision for loan losses 1,175 400 — — — — 1,175 400 Net interest income (expense) after provision for loan losses 53,994 52,220 (247 ) (135 ) 13,520 12,478 67,267 64,563 Noninterest income 12,146 10,773 18,808 19,875 1,166 1,088 32,120 31,736 Noninterest expenses: Depreciation and amortization expense 1,342 1,274 729 766 79 85 2,150 2,125 Other noninterest expenses 32,421 30,975 13,414 13,792 7,130 6,526 52,965 51,293 Total noninterest expenses 33,763 32,249 14,143 14,558 7,209 6,611 55,115 53,418 Income before income taxes 32,377 30,744 4,418 5,182 7,477 6,955 44,272 42,881 Income tax expense 7,024 6,490 1,199 1,298 1,281 1,208 9,504 8,996 Net income $25,353 $24,254 $3,219 $3,884 $6,196 $5,747 $34,768 $33,885 Total assets at period end $3,916,915 $3,647,649 $77,757 $68,009 $1,195,000 $1,021,584 $5,189,672 $4,737,242 Expenditures for long-lived assets 1,597 1,252 292 313 82 110 1,971 1,675

Other Comprehensive Income (L_2

Other Comprehensive Income (Loss) (Tables)	6 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Activity in Other Comprehensive Income (Loss)	The following tables present the activity in other comprehensive income (loss): Three months ended June 30, 2019 2018 (Dollars in thousands) Pre-tax Amounts Income Taxes Net of Tax Pre-tax Amounts Income Taxes Net of Tax Securities available for sale: Changes in fair value of available for sale debt securities $7,807 $1,835 $5,972 ($4,068 ) ($956 ) ($3,112 ) Net losses on debt securities reclassified into earnings (1) 80 19 61 — — — Net change in fair value of available for sale debt securities 7,887 1,854 6,033 (4,068 ) (956 ) (3,112 ) Cash flow hedges: Change in fair value of cash flow hedges (824 ) (194 ) (630 ) 455 107 348 Net cash flow hedge losses reclassified into earnings (2) 10 2 8 21 4 17 Net change in fair value of cash flow hedges (814 ) (192 ) (622 ) 476 111 365 Defined benefit plan obligations: Amortization of net actuarial losses (3) 300 71 229 477 113 364 Amortization of net prior service credits (3) (4 ) (1 ) (3 ) (5 ) (1 ) (4 ) Net change in defined benefit plan obligations 296 70 226 472 112 360 Total other comprehensive income (loss) $7,369 $1,732 $5,637 ($3,120 ) ($733 ) ($2,387 ) (1) The pre-tax amount is reported as net realized losses on securities in the Unaudited Consolidated Statements of Income. (2) The pre-tax amounts are included in interest expense on FHLB advances, interest expense on junior subordinated debentures and interest and fees on loans in the Unaudited Consolidated Statements of Income. (3) The pre-tax amounts are included in other expenses in the Unaudited Consolidated Statements of Income. Six months ended June 30, 2019 2018 (Dollars in thousands) Pre-tax Amounts Income Taxes Net of Tax Pre-tax Amounts Income Taxes Net of Tax Securities available for sale: Changes in fair value of available for sale debt securities $22,213 $5,220 $16,993 ($17,681 ) ($4,155 ) ($13,526 ) Net losses on debt securities reclassified into earnings (1) 80 19 61 — — — Net change in fair value of available for sale debt securities 22,293 5,239 17,054 (17,681 ) (4,155 ) (13,526 ) Cash flow hedges: Change in fair value of cash flow hedges (1,370 ) (322 ) (1,048 ) 1,258 198 1,060 Net cash flow hedge losses reclassified into earnings (2) (21 ) (5 ) (16 ) 252 58 194 Net change in fair value of cash flow hedges (1,391 ) (327 ) (1,064 ) 1,510 256 1,254 Defined benefit plan obligations: Amortization of net actuarial losses (3) 600 141 459 953 225 728 Amortization of net prior service credits (3) (8 ) (2 ) (6 ) (11 ) (3 ) (8 ) Net change in defined benefit plan obligations 592 139 453 942 222 720 Total other comprehensive (loss) income $21,494 $5,051 $16,443 ($15,229 ) ($3,677 ) ($11,552 ) (1) The pre-tax amount is reported as net realized losses on securities in the Unaudited Consolidated Statements of Income. (2) The pre-tax amounts are included in interest expense on FHLB advances, interest expense on junior subordinated debentures and interest and fees on loans in the Unaudited Consolidated Statements of Income. (3) The pre-tax amounts are included in other expenses in the Unaudited Consolidated Statements of Income.
Components of Accumulated Other Comprehensive Income (Loss)	The following tables present the changes in accumulated other comprehensive income (loss) by component, net of tax: (Dollars in thousands) Net Unrealized (Losses) Gains on Available For Sale Debt Securities Net Unrealized (Losses) Gains on Cash Flow Hedges Defined Benefit Pension Plan Adjustment Total For the three months ended June 30, 2019 Balance at April 1, 2019 ($5,741 ) ($251 ) ($11,511 ) ($17,503 ) Other comprehensive income (loss) before reclassifications 5,972 (630 ) — 5,342 Amounts reclassified from accumulated other comprehensive income 61 8 226 295 Net other comprehensive income (loss) 6,033 (622 ) 226 5,637 Balance at June 30, 2019 $292 ($873 ) ($11,285 ) ($11,866 ) (Dollars in thousands) Net Unrealized (Losses) Gains on Available For Sale Debt Securities Net Unrealized Gains (Losses) on Cash Flow Hedges Defined Benefit Pension Plan Adjustment Total For the six months ended June 30, 2019 Balance at January 1, 2019 ($16,762 ) $191 ($11,738 ) ($28,309 ) Other comprehensive income (loss) before reclassifications 16,993 (1,048 ) — 15,945 Amounts reclassified from accumulated other comprehensive income 61 (16 ) 453 498 Net other comprehensive income (loss) 17,054 (1,064 ) 453 16,443 Balance at June 30, 2019 $292 ($873 ) ($11,285 ) ($11,866 ) (Dollars in thousands) Net Unrealized Losses on Available For Sale Debt Securities Net Unrealized Gains on Cash Flow Hedges Defined Benefit Pension Plan Adjustment Total For the three months ended June 30, 2018 Balance at April 1, 2018 ($17,948 ) $461 ($15,188 ) ($32,675 ) Other comprehensive (loss) income before reclassifications (3,112 ) 348 — (2,764 ) Amounts reclassified from accumulated other comprehensive income — 17 360 377 Net other comprehensive (loss) income (3,112 ) 365 360 (2,387 ) Balance at June 30, 2018 ($21,060 ) $826 ($14,828 ) ($35,062 ) (Dollars in thousands) Net Unrealized Losses on Available For Sale Debt Securities Net Unrealized (Losses) Gains on Cash Flow Hedges Defined Benefit Pension Plan Adjustment Total For the six months ended June 30, 2018 Balance at January 1, 2018 ($7,534 ) ($428 ) ($15,548 ) ($23,510 ) Other comprehensive (loss) income before reclassifications (13,526 ) 1,060 — (12,466 ) Amounts reclassified from accumulated other comprehensive income — 194 720 914 Net other comprehensive (loss) income (13,526 ) 1,254 720 (11,552 ) Balance at June 30, 2018 ($21,060 ) $826 ($14,828 ) ($35,062 )

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Calculation of Earnings Per Share	The following table presents the calculation of earnings per common share: (Dollars and shares in thousands, except per share amounts) Three Months Six Months Periods ended June 30, 2019 2018 2019 2018 Earnings per common share - basic: Net income $17,273 $17,674 $34,768 $33,885 Less dividends and undistributed earnings allocated to participating securities (35 ) (38 ) (69 ) (76 ) Net income available to common shareholders $17,238 $17,636 $34,699 $33,809 Weighted average common shares 17,330 17,272 17,317 17,253 Earnings per common share - basic $0.99 $1.02 $2.00 $1.96 Earnings per common share - diluted: Net income $17,273 $17,674 $34,768 $33,885 Less dividends and undistributed earnings allocated to participating securities (35 ) (38 ) (69 ) (76 ) Net income available to common shareholders $17,238 $17,636 $34,699 $33,809 Weighted average common shares 17,330 17,272 17,317 17,253 Dilutive effect of common stock equivalents 75 115 86 131 Weighted average diluted common shares 17,405 17,387 17,403 17,384 Earnings per common share - diluted $0.99 $1.01 $1.99 $1.94

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Schedule of remaining operating lease payments, inclusive of renewal options	The following table presents the undiscounted annual lease payments under the terms of the Corporation’s operating leases at June 30, 2019 , including a reconciliation to the present value of operating lease liabilities recognized in the Corporation’s Unaudited Consolidated Balance Sheets: (Dollars in thousands) July 1, 2019 to December 31, 2019 $1,856 2020 3,515 2021 3,312 2022 3,165 2023 3,090 2024 and thereafter 24,716 Total operating lease payments (1) 39,654 Less interest 9,444 Present value of operating lease liabilities (2) $30,210 (1) Includes $4.2 million related to options to extend lease terms that are reasonably certain of being exercised. (2) Includes short-term operating lease liabilities of $2.5 million .
Schedule of total lease expense	The following table presents the components of total lease expense and operating cash flows: (Dollars in thousands) Periods ended June 30, 2019 Three Months Six Months Lease Expense: Operating lease expense $928 $1,856 Variable lease expense 12 23 Total lease expense (1) $940 $1,879 Cash Paid: Cash paid reducing operating lease liabilities $831 $1,751 (1) Included in net occupancy expenses in the Unaudited Consolidated Income Statement.
Schedule of future minimum lease payments	The following table presents the minimum annual lease payments under the terms of these leases, exclusive of renewal provisions at December 31, 2018 : (Dollars in thousands) Years ending December 31: 2019 $3,544 2020 2,980 2021 2,677 2022 2,293 2023 2,059 2024 and thereafter 22,648 Total minimum lease payments $36,201

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Financial Instruments with Off Balance Sheet Risk	The following table presents the contractual and notional amounts of financial instruments with off-balance sheet risk: (Dollars in thousands) Jun 30, Dec 31, Financial instruments whose contract amounts represent credit risk: Commitments to extend credit: Commercial loans $480,851 $533,884 Home equity lines 285,601 270,462 Other loans 87,343 46,698 Standby letters of credit 9,189 7,706 Financial instruments whose notional amounts exceed the amount of credit risk: Forward loan commitments: Interest rate lock commitments 89,682 30,766 Forward sale commitments 149,404 61,993 Loan related derivative contracts: Interest rate swaps with customers 678,865 648,050 Mirror swaps with counterparties 678,865 648,050 Risk participation-in agreements 46,205 46,510 Foreign exchange contracts 2,763 2,784 Interest rate risk management contracts: Interest rate swaps 60,000 60,000

Recently Issued Accounting Pr_2

Recently Issued Accounting Pronouncements (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Jun. 30, 2019		Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets	$ 28,900	$ 28,174			$ 0
Operating lease liabilities	30,900	30,210	[1]		0
Rent-related liabilities	2,900
Cumulative effect on retained earnings, tax	222
Cumulative effect on retained earnings, net of tax	722
Held to maturity debt securities, at amortized cost		0			10,415
Held to maturity debt securities, fair value		0			10,316
Unrealized losses on held to maturity securities, net of tax		$ (11,866)		$ (17,503)	$ (28,309)	$ (35,062)	$ (32,675)	$ (23,510)
Retained Earnings [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect on retained earnings, net of tax	$ 722
[1]	Includes short-term operating lease liabilities of $2.5 million .

Cash and Due from Banks (Narrat

Cash and Due from Banks (Narrative) (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Cash and Cash Equivalents [Abstract]
Average reserve deposited with the Board of Governors of the Federal Reserve Bank	$ 25.5	$ 21.6
Interest-bearing deposits in other banks	$ 61.7	$ 33.7

Securities (Narrative) (Details

Securities (Narrative) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)security	Mar. 31, 2019USD ($)	Jan. 01, 2019USD ($)	Dec. 31, 2018USD ($)security	Jun. 30, 2018USD ($)	Mar. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Held to maturity debt securities, at amortized cost	$ 0			$ 10,415
Held to maturity debt securities, fair value	0			10,316
Unrealized losses on held to maturity securities, net of tax	(11,866)	$ (17,503)		(28,309)	$ (35,062)	$ (32,675)	$ (23,510)
Fair value of available for sale and held to maturity securities pledged as collateral	451,500			$ 439,700
Amortized cost of callable debt securities	262,500
Fair value of callable debt securities	$ 260,600
Number of securities in a continuous unrealized loss position total | security	49			90
Unrealized losses of securities in a continuous unrealized loss position total	$ (7,368)			$ (24,396)
Individual name issuer trust preferred debt securities
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Number of securities in a continuous unrealized loss position total | security	5			5
Securities in unrealized loss position, number of companies issuing securities | security	4
Amortized cost of trust preferred securities of individual name issuers that are below investment grade	$ 6,100
Unrealized losses of trust preferred securities of individual name issuers that are below investment grade	518
Unrealized losses of securities in a continuous unrealized loss position total	$ (1,014)			$ (1,535)
Corporate bonds [Member]
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Number of securities in a continuous unrealized loss position total | security	4			8
Unrealized losses of securities in a continuous unrealized loss position total	$ (1,568)			$ (1,777)
Minimum [Member]
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Maturity period of callable debt securities	3 months
Call features of callable debt securities	1 month
Maximum [Member]
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Maturity period of callable debt securities	18 years
Call features of callable debt securities	4 years
Adjustments for Change in Accounting Principle [Domain]
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Held to maturity debt securities, at amortized cost			$ 10,400
Held to maturity debt securities, fair value			10,300
Unrealized losses on held to maturity securities, net of tax			$ (75)

Securities (Summary of Investme

Securities (Summary of Investments) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Available for sale debt securities amortized cost basis	$ 968,784	$ 949,720
Available for sale debt securities unrealized gains	7,752	2,387
Available for sale debt securities unrealized losses	(7,368)	(24,297)
Available for sale debt securities, at fair value	969,168	927,810
Held to maturity debt securities	0	10,415
Held to maturity debt securities unrealized gains		0
Held to maturity debt securities unrealized losses		(99)
Held to maturity debt securities, fair value	0	10,316
Total securities amortized cost	968,784	960,135
Total securities unrealized gains	7,752	2,387
Total securities unrealized losses	(7,368)	(24,396)
Total securities fair value	969,168	938,126
Obligations of U.S. government-sponsored enterprises [Member]
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Available for sale debt securities amortized cost basis	236,726	246,708
Available for sale debt securities unrealized gains	1,005	442
Available for sale debt securities unrealized losses	(304)	(4,467)
Available for sale debt securities, at fair value	237,427	242,683
Mortgage-backed securities issued by U.S. government-sponsored agencies and U.S. government-sponsored enterprises [Member]
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Available for sale debt securities amortized cost basis	704,940	675,368
Available for sale debt securities unrealized gains	6,722	1,943
Available for sale debt securities unrealized losses	(4,482)	(16,518)
Available for sale debt securities, at fair value	707,180	660,793
Held to maturity debt securities		10,415
Held to maturity debt securities unrealized gains		0
Held to maturity debt securities unrealized losses		(99)
Held to maturity debt securities, fair value		10,316
Obligations of states and political subdivisions [Member]
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Available for sale debt securities amortized cost basis	90	935
Available for sale debt securities unrealized gains	0	2
Available for sale debt securities unrealized losses	0	0
Available for sale debt securities, at fair value	90	937
Individual name issuer trust preferred debt securities
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Available for sale debt securities amortized cost basis	13,315	13,307
Available for sale debt securities unrealized gains	0	0
Available for sale debt securities unrealized losses	(1,014)	(1,535)
Available for sale debt securities, at fair value	12,301	11,772
Corporate bonds [Member]
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Available for sale debt securities amortized cost basis	13,713	13,402
Available for sale debt securities unrealized gains	25	0
Available for sale debt securities unrealized losses	(1,568)	(1,777)
Available for sale debt securities, at fair value	$ 12,170	$ 11,625

Securities (Securities by Contr

Securities (Securities by Contractual Maturity) (Details) $ in Thousands	Jun. 30, 2019USD ($)
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Available for sale debt securities maturities within 1 year amortized cost	$ 106,685
Available for sale debt securities maturities 1-5 years amortized cost	361,981
Available for sale debt securities maturities 5-10 years amortized cost	334,575
Available for sale debt securities maturities after 10 years amortized cost	165,543
Available for sale debt securities maturities total amortized cost	968,784
Available for sale debt securities maturities within 1 year fair value	106,963
Available for sale debt securities maturities 1-5 years fair value	362,982
Available for sale debt securities maturities 5-10 years fair value	334,065
Available for sale debt securities maturities after 10 years fair value	165,158
Available for sale debt securities fair value	$ 969,168

Securities (Securities in a Con

Securities (Securities in a Continuous Unrealized Loss Position) (Details) $ in Thousands	Jun. 30, 2019USD ($)security	Dec. 31, 2018USD ($)security
Debt Securities, Available-for-sale [Line Items]
Number of securities in a continuous unrealized loss position for less than 12 months | security	0	13
Fair value of securities in a continuous unrealized loss position for less than 12 months	$ 0	$ 48,258
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	$ 0	$ (448)
Number of securities in a continuous unrealized loss position for 12 months or longer | security	49	77
Fair value of securities in a continuous unrealized loss position for 12 months or longer	$ 379,384	$ 617,932
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	$ (7,368)	$ (23,948)
Number of securities in a continuous unrealized loss position total | security	49	90
Fair value of securities in a continuous unrealized loss position total	$ 379,384	$ 666,190
Unrealized losses of securities in a continuous unrealized loss position total	$ (7,368)	$ (24,396)
Obligations of U.S. government-sponsored enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Number of securities in a continuous unrealized loss position for less than 12 months | security	0	0
Fair value of securities in a continuous unrealized loss position for less than 12 months	$ 0	$ 0
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	$ 0	$ 0
Number of securities in a continuous unrealized loss position for 12 months or longer | security	5	16
Fair value of securities in a continuous unrealized loss position for 12 months or longer	$ 60,697	$ 157,032
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	$ (304)	$ (4,467)
Number of securities in a continuous unrealized loss position total | security	5	16
Fair value of securities in a continuous unrealized loss position total	$ 60,697	$ 157,032
Unrealized losses of securities in a continuous unrealized loss position total	$ (304)	$ (4,467)
Mortgage-backed securities issued by U.S. government-sponsored agencies and U.S. government-sponsored enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Number of securities in a continuous unrealized loss position for less than 12 months | security	0	10
Fair value of securities in a continuous unrealized loss position for less than 12 months	$ 0	$ 47,060
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	$ 0	$ (439)
Number of securities in a continuous unrealized loss position for 12 months or longer | security	35	51
Fair value of securities in a continuous unrealized loss position for 12 months or longer	$ 295,954	$ 438,701
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	$ (4,482)	$ (16,178)
Number of securities in a continuous unrealized loss position total | security	35	61
Fair value of securities in a continuous unrealized loss position total	$ 295,954	$ 485,761
Unrealized losses of securities in a continuous unrealized loss position total	$ (4,482)	$ (16,617)
Individual name issuer trust preferred debt securities
Debt Securities, Available-for-sale [Line Items]
Number of securities in a continuous unrealized loss position for less than 12 months | security	0	0
Fair value of securities in a continuous unrealized loss position for less than 12 months	$ 0	$ 0
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	$ 0	$ 0
Number of securities in a continuous unrealized loss position for 12 months or longer | security	5	5
Fair value of securities in a continuous unrealized loss position for 12 months or longer	$ 12,301	$ 11,772
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	$ (1,014)	$ (1,535)
Number of securities in a continuous unrealized loss position total | security	5	5
Fair value of securities in a continuous unrealized loss position total	$ 12,301	$ 11,772
Unrealized losses of securities in a continuous unrealized loss position total	$ (1,014)	$ (1,535)
Corporate bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Number of securities in a continuous unrealized loss position for less than 12 months | security	0	3
Fair value of securities in a continuous unrealized loss position for less than 12 months	$ 0	$ 1,198
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	$ 0	$ (9)
Number of securities in a continuous unrealized loss position for 12 months or longer | security	4	5
Fair value of securities in a continuous unrealized loss position for 12 months or longer	$ 10,432	$ 10,427
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	$ (1,568)	$ (1,768)
Number of securities in a continuous unrealized loss position total | security	4	8
Fair value of securities in a continuous unrealized loss position total	$ 10,432	$ 11,625
Unrealized losses of securities in a continuous unrealized loss position total	$ (1,568)	$ (1,777)

Securities Schedule of Amounts

Securities Schedule of Amounts from Sales of Securities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Gain (Loss) on Securities [Line Items]
Proceeds from sales	$ 9,920	$ 0	$ 9,920	$ 0
Gross realized gains	0	0	0	0
Gross realized losses	(80)	0	(80)	0
Net realized losses on securities	$ (80)	$ 0	$ (80)	$ 0

Loans (Narrative) (Details)

Loans (Narrative) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Receivables [Abstract]
Loans Receivable Net Deferred Cost Originated	$ 5,300	$ 4,700
Loans Receivable Net Deferred Premium on Purchased Loans	609	703
Loans Pledged as Collateral	2,000,000	2,000,000
Past due loans included in nonaccrual loans	8,600	8,600
Mortgage Loans in Process of Foreclosure	$ 3,500	$ 761

Loans (Summary of Loans) (Detai

Loans (Summary of Loans) (Details) - USD ($) $ in Thousands		Jun. 30, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	[1]	$ 3,730,339	$ 3,680,360
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	[2]	1,482,836	1,392,408
Commercial & Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	[3]	583,873	620,704
Total Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		2,066,709	2,013,112
Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	[4]	1,352,113	1,360,387
Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		288,078	280,626
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	[5]	23,439	26,235
Total Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		$ 311,517	$ 306,861
[1]	Includes net unamortized loan origination costs of $5.3 million and $4.7 million , respectively, at June 30, 2019 and December 31, 2018 and net unamortized premiums on purchased loans of $609 thousand and $703 thousand , respectively, at June 30, 2019 and December 31, 2018 .
[2]	Consists of commercial mortgages primarily secured by income-producing property, as well as construction and development loans. Construction and development loans are made to businesses for land development or the on-site construction of industrial, commercial, or residential buildings.
[3]	Consists of loans to businesses and individuals, a substantial portion of which are fully or partially collateralized by real estate.
[4]	Consists of mortgage and homeowner construction loans secured by one- to four-family residential properties.
[5]	Consists of loans to individuals secured by general aviation aircraft and other personal installment loans.

Loans (Past Due Loans) (Details

Loans (Past Due Loans) (Details) - USD ($) $ in Thousands		Jun. 30, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		$ 17,914	$ 13,622
Current		3,712,425	3,666,738
Total loans	[1]	3,730,339	3,680,360
30-59
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		8,527	7,787
60-89
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		3,110	3,774
Over 90
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		6,277	2,061
Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		3,670	1,080
Current		1,479,166	1,391,328
Total loans	[2]	1,482,836	1,392,408
Commercial Real Estate | 30-59
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		2,744	155
Commercial Real Estate | 60-89
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		0	925
Commercial Real Estate | Over 90
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		926	0
Commercial & Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		1	0
Current		583,872	620,704
Total loans	[3]	583,873	620,704
Commercial & Industrial | 30-59
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		1	0
Commercial & Industrial | 60-89
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		0	0
Commercial & Industrial | Over 90
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		0	0
Total Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		3,671	1,080
Current		2,063,038	2,012,032
Total loans		2,066,709	2,013,112
Total Commercial | 30-59
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		2,745	155
Total Commercial | 60-89
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		0	925
Total Commercial | Over 90
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		926	0
Residential Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		11,237	10,520
Current		1,340,876	1,349,867
Total loans	[4]	1,352,113	1,360,387
Residential Real Estate | 30-59
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		4,006	6,318
Residential Real Estate | 60-89
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		2,758	2,693
Residential Real Estate | Over 90
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		4,473	1,509
Home Equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		2,904	1,989
Current		285,174	278,637
Total loans		288,078	280,626
Home Equity | 30-59
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		1,763	1,281
Home Equity | 60-89
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		351	156
Home Equity | Over 90
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		790	552
Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		102	33
Current		23,337	26,202
Total loans	[5]	23,439	26,235
Other | 30-59
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		13	33
Other | 60-89
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		1	0
Other | Over 90
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		88	0
Total Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		3,006	2,022
Current		308,511	304,839
Total loans		311,517	306,861
Total Consumer | 30-59
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		1,776	1,314
Total Consumer | 60-89
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		352	156
Total Consumer | Over 90
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		$ 878	$ 552
[1]	Includes net unamortized loan origination costs of $5.3 million and $4.7 million , respectively, at June 30, 2019 and December 31, 2018 and net unamortized premiums on purchased loans of $609 thousand and $703 thousand , respectively, at June 30, 2019 and December 31, 2018 .
[2]	Consists of commercial mortgages primarily secured by income-producing property, as well as construction and development loans. Construction and development loans are made to businesses for land development or the on-site construction of industrial, commercial, or residential buildings.
[3]	Consists of loans to businesses and individuals, a substantial portion of which are fully or partially collateralized by real estate.
[4]	Consists of mortgage and homeowner construction loans secured by one- to four-family residential properties.
[5]	Consists of loans to individuals secured by general aviation aircraft and other personal installment loans.

Loans (Impaired Loans) (Details

Loans (Impaired Loans) (Details) - USD ($)		Jun. 30, 2019	Dec. 31, 2018
Financing Receivable, Impaired [Line Items]
Recorded Investment of Impaired Loans with No Related Allowance	[1]	$ 12,063,000	$ 16,313,000
Recorded Investment of Impaired Loans with Related Allowance	[1]	1,185,000	523,000
Total Recorded Investment of Impaired Loans	[1]	13,248,000	16,836,000
Unpaid Principal of Impaired Loans with No Related Allowance		12,900,000	16,713,000
Unpaid Principal of Impaired Loans with Related Allowance		1,211,000	570,000
Total Unpaid Principal of Impaired Loans		14,111,000	17,283,000
No Related Allowance on Impaired Loans		0	0
Related Allowance on Impaired Loans		119,000	127,000
Commercial Real Estate
Financing Receivable, Impaired [Line Items]
Recorded Investment of Impaired Loans with No Related Allowance	[1]	926,000	925,000
Recorded Investment of Impaired Loans with Related Allowance	[1]	0	0
Unpaid Principal of Impaired Loans with No Related Allowance		926,000	926,000
Unpaid Principal of Impaired Loans with Related Allowance		0	0
No Related Allowance on Impaired Loans		0	0
Related Allowance on Impaired Loans		0	0
Commercial & Industrial
Financing Receivable, Impaired [Line Items]
Recorded Investment of Impaired Loans with No Related Allowance	[1]	0	4,681,000
Recorded Investment of Impaired Loans with Related Allowance	[1]	0	52,000
Unpaid Principal of Impaired Loans with No Related Allowance		0	4,732,000
Unpaid Principal of Impaired Loans with Related Allowance		0	73,000
No Related Allowance on Impaired Loans		0	0
Related Allowance on Impaired Loans		0	0
Total Commercial
Financing Receivable, Impaired [Line Items]
Recorded Investment of Impaired Loans with No Related Allowance	[1]	926,000	5,606,000
Recorded Investment of Impaired Loans with Related Allowance	[1]	0	52,000
Total Recorded Investment of Impaired Loans	[1]	926,000	5,658,000
Unpaid Principal of Impaired Loans with No Related Allowance		926,000	5,658,000
Unpaid Principal of Impaired Loans with Related Allowance		0	73,000
Total Unpaid Principal of Impaired Loans		926,000	5,731,000
No Related Allowance on Impaired Loans		0	0
Related Allowance on Impaired Loans		0	0
Residential Real Estate
Financing Receivable, Impaired [Line Items]
Recorded Investment of Impaired Loans with No Related Allowance	[1]	9,825,000	9,347,000
Recorded Investment of Impaired Loans with Related Allowance	[1]	1,145,000	364,000
Total Recorded Investment of Impaired Loans	[1]	10,970,000	9,711,000
Unpaid Principal of Impaired Loans with No Related Allowance		10,662,000	9,695,000
Unpaid Principal of Impaired Loans with Related Allowance		1,171,000	390,000
Total Unpaid Principal of Impaired Loans		11,833,000	10,085,000
No Related Allowance on Impaired Loans		0	0
Related Allowance on Impaired Loans		97,000	100,000
Home Equity
Financing Receivable, Impaired [Line Items]
Recorded Investment of Impaired Loans with No Related Allowance	[1]	1,224,000	1,360,000
Recorded Investment of Impaired Loans with Related Allowance	[1]	21,000	85,000
Unpaid Principal of Impaired Loans with No Related Allowance		1,224,000	1,360,000
Unpaid Principal of Impaired Loans with Related Allowance		21,000	85,000
No Related Allowance on Impaired Loans		0	0
Related Allowance on Impaired Loans		20,000	24,000
Other
Financing Receivable, Impaired [Line Items]
Recorded Investment of Impaired Loans with No Related Allowance	[1]	88,000	0
Recorded Investment of Impaired Loans with Related Allowance	[1]	19,000	22,000
Unpaid Principal of Impaired Loans with No Related Allowance		88,000	0
Unpaid Principal of Impaired Loans with Related Allowance		19,000	22,000
No Related Allowance on Impaired Loans		0	0
Related Allowance on Impaired Loans		2,000	3,000
Total Consumer
Financing Receivable, Impaired [Line Items]
Recorded Investment of Impaired Loans with No Related Allowance	[1]	1,312,000	1,360,000
Recorded Investment of Impaired Loans with Related Allowance	[1]	40,000	107,000
Total Recorded Investment of Impaired Loans	[1]	1,352,000	1,467,000
Unpaid Principal of Impaired Loans with No Related Allowance		1,312,000	1,360,000
Unpaid Principal of Impaired Loans with Related Allowance		40,000	107,000
Total Unpaid Principal of Impaired Loans		1,352,000	1,467,000
No Related Allowance on Impaired Loans		0	0
Related Allowance on Impaired Loans		$ 22,000	$ 27,000
[1]	The recorded investment in impaired loans consists of unpaid principal balance, net of charge-offs, interest payments received applied to principal and unamortized deferred loan origination fees and costs. For accruing impaired loans (troubled debt restructurings for which management has concluded that the collectibility of the loan is not in doubt), the recorded investment also includes accrued interest.

Loans (Impaired Loans Interest

Loans (Impaired Loans Interest Income Recognized) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Financing Receivable, Impaired [Line Items]
Average Recorded Investment of Impaired Loans	$ 16,889	$ 17,124	$ 17,102	$ 18,680
Interest Income Recognized on Impaired Loans	169	170	353	360
Commercial Real Estate
Financing Receivable, Impaired [Line Items]
Average Recorded Investment of Impaired Loans	926	0	951	2,039
Interest Income Recognized on Impaired Loans	0	0	1	0
Commercial & Industrial
Financing Receivable, Impaired [Line Items]
Average Recorded Investment of Impaired Loans	3,868	5,983	4,276	5,738
Interest Income Recognized on Impaired Loans	49	73	103	139
Total Commercial
Financing Receivable, Impaired [Line Items]
Average Recorded Investment of Impaired Loans	4,794	5,983	5,227	7,777
Interest Income Recognized on Impaired Loans	49	73	104	139
Residential Real Estate
Financing Receivable, Impaired [Line Items]
Average Recorded Investment of Impaired Loans	10,728	10,017	10,441	9,934
Interest Income Recognized on Impaired Loans	107	85	222	197
Home Equity
Financing Receivable, Impaired [Line Items]
Average Recorded Investment of Impaired Loans	1,332	1,036	1,406	853
Interest Income Recognized on Impaired Loans	13	10	27	19
Other
Financing Receivable, Impaired [Line Items]
Average Recorded Investment of Impaired Loans	35	88	28	116
Interest Income Recognized on Impaired Loans	0	2	0	5
Total Consumer
Financing Receivable, Impaired [Line Items]
Average Recorded Investment of Impaired Loans	1,367	1,124	1,434	969
Interest Income Recognized on Impaired Loans	$ 13	$ 12	$ 27	$ 24

Loans (Nonaccrual Loans) (Detai

Loans (Nonaccrual Loans) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 12,867	$ 11,707
Accruing loans 90 days or more past due	0	0
Current Payment Status [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans current on payment	4,300	3,100
Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	926	925
Commercial & Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	0	0
Total Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	926	925
Residential Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	10,610	9,346
Home Equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	1,243	1,436
Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	88	0
Total Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 1,331	$ 1,436

Loans (Narrative - Troubled Deb

Loans (Narrative - Troubled Debt Restructurings) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Receivables [Abstract]
Recorded investment in Troubled Debt Restructuring, Recorded Investment	$ 882	$ 5,600
Specific Reserves on Troubled Debt Restructurings	$ 100	$ 103

Loans Loans (Troubled Debt Rest

Loans Loans (Troubled Debt Restructurings Type of Modification) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019USD ($)loan	Jun. 30, 2018USD ($)loan	Jun. 30, 2019USD ($)loan	Jun. 30, 2018USD ($)loan
Financing Receivable, Modifications [Line Items]
Number of loans modified as a troubled debt restructuring | loan	0	0	0	1
Troubled debt restructuring, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 608
Troubled debt restructuring, post-modification recorded investment	$ 0	$ 0	$ 0	$ 608

Loans Loans (Troubled Debt Re_2

Loans Loans (Troubled Debt Restructurings Subsequent Default) (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019USD ($)loan	Jun. 30, 2018USD ($)loan	Jun. 30, 2019USD ($)loan	Jun. 30, 2018USD ($)loan
Financing Receivable, Modifications [Line Items]
Number of loans modified as a troubled debt restructuring	0	0	0	1
Payment Default [Member]
Financing Receivable, Modifications [Line Items]
Number of loans modified as a troubled debt restructuring	0	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0	$ 0	$ 0

Loans (Credit Quality Indicator

Loans (Credit Quality Indicators - Commercial) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Commercial Real Estate | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	$ 1,460,537	$ 1,387,666
Commercial Real Estate | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	17,587	205
Commercial Real Estate | Classified [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	4,712	4,537
Commercial & Industrial | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	546,188	559,019
Commercial & Industrial | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	22,234	50,426
Commercial & Industrial | Classified [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	15,451	11,259
Total Commercial | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	2,006,725	1,946,685
Total Commercial | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	39,821	50,631
Total Commercial | Classified [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable	$ 20,163	$ 15,796

Loans (Credit Quality Indicat_2

Loans (Credit Quality Indicators - Residential, Consumer) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment [Line Items]
Current	$ 3,712,425	$ 3,666,738
Total past due	17,914	13,622
Self-originated Mortgages
Financing Receivable, Recorded Investment [Line Items]
Current	1,239,272	1,238,402
Total past due	10,141	9,079
Purchased Mortgages
Financing Receivable, Recorded Investment [Line Items]
Current	101,604	111,465
Total past due	1,096	1,441
Residential Real Estate
Financing Receivable, Recorded Investment [Line Items]
Current	1,340,876	1,349,867
Total past due	11,237	10,520
Home Equity
Financing Receivable, Recorded Investment [Line Items]
Current	285,174	278,637
Total past due	2,904	1,989
Other
Financing Receivable, Recorded Investment [Line Items]
Current	23,337	26,202
Total past due	102	33
Total Consumer
Financing Receivable, Recorded Investment [Line Items]
Current	308,511	304,839
Total past due	$ 3,006	$ 2,022

Allowance for Loan Losses (All

Allowance for Loan Losses (Allowance for Loan Losses Rollforward Analysis) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, Beginning Balance		$ 27,644	$ 25,864	$ 27,072	$ 26,488
Charge-offs		(819)	(103)	(922)	(793)
Recoveries		48	13	73	79
Provision		525	400	1,175	400
Allowance, Ending Balance		27,398	26,174	27,398	26,174
Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, Beginning Balance	[1]	17,191	11,819	15,381	12,729
Charge-offs	[1]	0	0	0	(627)
Recoveries	[1]	0	0	0	25
Provision	[1]	(309)	624	1,501	316
Allowance, Ending Balance	[1]	16,882	12,443	16,882	12,443
Commercial & Industrial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, Beginning Balance	[2]	4,498	5,871	5,847	5,580
Charge-offs	[2]	(4)	(1)	(18)	(7)
Recoveries	[2]	20	4	28	33
Provision	[2]	(61)	768	(1,404)	1,036
Allowance, Ending Balance	[2]	4,453	6,642	4,453	6,642
Total Commercial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, Beginning Balance		21,689	17,690	21,228	18,309
Charge-offs		(4)	(1)	(18)	(634)
Recoveries		20	4	28	58
Provision		(370)	1,392	97	1,352
Allowance, Ending Balance		21,335	19,085	21,335	19,085
Residential Real Estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, Beginning Balance		4,009	5,494	3,987	5,427
Charge-offs		(486)	(5)	(486)	(5)
Recoveries		0	0	0	0
Provision		1,334	(175)	1,356	(108)
Allowance, Ending Balance		4,857	5,314	4,857	5,314
Home Equity
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, Beginning Balance		1,589	2,192	1,603	2,412
Charge-offs		(311)	(76)	(372)	(111)
Recoveries		22	3	35	10
Provision		(387)	(744)	(353)	(936)
Allowance, Ending Balance		913	1,375	913	1,375
Other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, Beginning Balance		357	488	254	340
Charge-offs		(18)	(21)	(46)	(43)
Recoveries		6	6	10	11
Provision		(52)	(73)	75	92
Allowance, Ending Balance		293	400	293	400
Total Consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, Beginning Balance		1,946	2,680	1,857	2,752
Charge-offs		(329)	(97)	(418)	(154)
Recoveries		28	9	45	21
Provision		(439)	(817)	(278)	(844)
Allowance, Ending Balance		$ 1,206	$ 1,775	$ 1,206	$ 1,775
[1]	Commercial real estate loans.
[2]	Commercial & industrial loans.

Allowance for Loan Losses (Allo

Allowance for Loan Losses (Allowance for Loan Losses by Segment & Impairment Methodology) (Details) - USD ($) $ in Thousands		Jun. 30, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment		$ 13,247	$ 16,816
Loans related allowance individually evaluated for impairment		119	127
Loans collectively evaluated for impairment		3,717,092	3,663,544
Loans related allowance collectively evaluated for impairment		27,279	26,945
Total loans	[1]	3,730,339	3,680,360
Allowance		27,398	27,072
Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment		926	925
Loans related allowance individually evaluated for impairment		0	0
Loans collectively evaluated for impairment		1,481,910	1,391,483
Loans related allowance collectively evaluated for impairment		16,882	15,381
Total loans	[2]	1,482,836	1,392,408
Commercial & Industrial
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment		0	4,714
Loans related allowance individually evaluated for impairment		0	0
Loans collectively evaluated for impairment		583,873	615,990
Loans related allowance collectively evaluated for impairment		4,453	5,847
Total loans	[3]	583,873	620,704
Total Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment		926	5,639
Loans related allowance individually evaluated for impairment		0	0
Loans collectively evaluated for impairment		2,065,783	2,007,473
Loans related allowance collectively evaluated for impairment		21,335	21,228
Total loans		2,066,709	2,013,112
Residential Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment		10,969	9,710
Loans related allowance individually evaluated for impairment		97	100
Loans collectively evaluated for impairment		1,341,144	1,350,677
Loans related allowance collectively evaluated for impairment		4,760	3,887
Total loans	[4]	1,352,113	1,360,387
Home Equity
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment		1,245	1,445
Loans related allowance individually evaluated for impairment		20	24
Loans collectively evaluated for impairment		286,833	279,182
Loans related allowance collectively evaluated for impairment		893	1,579
Total loans		288,078	280,626
Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment		107	22
Loans related allowance individually evaluated for impairment		2	3
Loans collectively evaluated for impairment		23,332	26,212
Loans related allowance collectively evaluated for impairment		291	251
Total loans	[5]	23,439	26,235
Total Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment		1,352	1,467
Loans related allowance individually evaluated for impairment		22	27
Loans collectively evaluated for impairment		310,165	305,394
Loans related allowance collectively evaluated for impairment		1,184	1,830
Total loans		$ 311,517	$ 306,861
[1]	Includes net unamortized loan origination costs of $5.3 million and $4.7 million , respectively, at June 30, 2019 and December 31, 2018 and net unamortized premiums on purchased loans of $609 thousand and $703 thousand , respectively, at June 30, 2019 and December 31, 2018 .
[2]	Consists of commercial mortgages primarily secured by income-producing property, as well as construction and development loans. Construction and development loans are made to businesses for land development or the on-site construction of industrial, commercial, or residential buildings.
[3]	Consists of loans to businesses and individuals, a substantial portion of which are fully or partially collateralized by real estate.
[4]	Consists of mortgage and homeowner construction loans secured by one- to four-family residential properties.
[5]	Consists of loans to individuals secured by general aviation aircraft and other personal installment loans.

Federal Home Loan Bank Advanc_2

Federal Home Loan Bank Advances (Narrative Federal Home Loan Bank Advances) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Federal Home Loan Bank, Advances, Branch of FHLBB Bank [Line Items]
Federal Home Loan Bank advances	$ 1,060,960	$ 950,722
Federal Home Loan Bank of Boston [Member]
Federal Home Loan Bank, Advances, Branch of FHLBB Bank [Line Items]
Federal Home Loan Bank advances	1,060,960	950,700
Unused line of credit with FHLBB	40,000	40,000
Unused remaining available borrowing capacity with FHLBB	$ 535,300	$ 628,500

Federal Home Loan Bank Advanc_3

Federal Home Loan Bank Advances (Federal Home Loan Bank Advances Maturity Schedule) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Federal Home Loan Bank, Advances, Branch of FHLBB Bank [Line Items]
Federal Home Loan Bank advances	$ 1,060,960	$ 950,722
Federal Home Loan Bank of Boston [Member]
Federal Home Loan Bank, Advances, Branch of FHLBB Bank [Line Items]
Scheduled maturity through the end of the current year	$ 534,996
Weighted average rate for scheduled maturity through the end of the current year	2.58%
Scheduled maturity in year two	$ 369,533
Weighted average rate for scheduled maturity in year two	2.39%
Scheduled maturity in year three	$ 86,222
Weighted average rate for scheduled maturity in year three	2.73%
Scheduled maturity in year four	$ 55,447
Weighted average rate for scheduled maturity in year four	3.65%
Scheduled maturity in year five	$ 9,428
Weighted average rate for scheduled maturity in year five	4.01%
Scheduled maturity after year five	$ 5,334
Weighted average rate for scheduled maturity after year five	5.06%
Federal Home Loan Bank advances	$ 1,060,960	$ 950,700
Total weighted average rate	2.60%

Shareholders' Equity (Narrative

Shareholders' Equity (Narrative) (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Statement of Stockholders' Equity [Abstract]
Trust preferred securities included in Tier 1 Capital	$ 22	$ 22

Shareholders' Equity (Regulator

Shareholders' Equity (Regulatory Captial Requirements) (Details) - USD ($) $ in Thousands		Jun. 30, 2019	Dec. 31, 2018
Corporation [Member]
Total Capital (to Risk-Weighted Assets):
Total Capital		$ 475,982	$ 455,699
Total Capital to Risk-Weighted Assets		12.80%	12.56%
Total Capital for Capital Adequacy Purposes		$ 297,470	$ 290,146
Total Capital for Capital Adequacy Purposes to Risk-Weighted Assets		8.00%	8.00%
Tier 1 Capital (to Risk-Weighted Assets):
Tier 1 Capital		$ 448,282	$ 428,338
Tier 1 Capital to Risk Weighted-Assets		12.06%	11.81%
Tier 1 Capital Required For Capital Adequacy Purposes		$ 223,102	$ 217,609
Tier 1 Capital Required for Capital Adequacy Purposes to Risk Weighted-Assets		6.00%	6.00%
Common Equity Tier 1 Capital [Abstract]
Common Equity Tier 1 Capital		$ 426,284	$ 406,340
Common Equity Tier 1 Capital to Risk Weighted Assets		11.46%	11.20%
Common Equity Tier 1 Capital Required for Capital Adequacy		$ 167,327	$ 163,207
Common Equity Tier 1 Capital for Capital Adequacy to Risk Weighted Assets		4.50%	4.50%
Tier 1 Capital (to Average Assets):
Tier 1 Leverage Capital	[1]	$ 448,282	$ 428,338
Tier 1 Leverage Capital to Average Assets	[1]	8.76%	8.89%
Tier 1 Leverage Capital Required for Capital Adequacy Purposes	[1]	$ 204,811	$ 192,690
Tier 1 Leverage Capital Required for Capital Adequacy Purposes to Average Assets	[1]	4.00%	4.00%
Bank [Member]
Total Capital (to Risk-Weighted Assets):
Total Capital		$ 473,515	$ 453,033
Total Capital to Risk-Weighted Assets		12.74%	12.49%
Total Capital for Capital Adequacy Purposes		$ 297,426	$ 290,128
Total Capital for Capital Adequacy Purposes to Risk-Weighted Assets		8.00%	8.00%
Total Capital To Be Well Capitalized		$ 371,783	$ 362,660
Total Capital To Be Well Capitalized to Risk Weighted-Assets		10.00%	10.00%
Tier 1 Capital (to Risk-Weighted Assets):
Tier 1 Capital		$ 445,815	$ 425,672
Tier 1 Capital to Risk Weighted-Assets		11.99%	11.74%
Tier 1 Capital Required For Capital Adequacy Purposes		$ 223,070	$ 217,596
Tier 1 Capital Required for Capital Adequacy Purposes to Risk Weighted-Assets		6.00%	6.00%
Tier 1 Capital Required To Be Well Capitalized		$ 297,426	$ 290,128
Tier 1 Capital Required To Be Well Capitalized to Risk Weighted-Assets		8.00%	8.00%
Common Equity Tier 1 Capital [Abstract]
Common Equity Tier 1 Capital		$ 445,815	$ 425,672
Common Equity Tier 1 Capital to Risk Weighted Assets		11.99%	11.74%
Common Equity Tier 1 Capital Required for Capital Adequacy		$ 167,302	$ 163,197
Common Equity Tier 1 Capital for Capital Adequacy to Risk Weighted Assets		4.50%	4.50%
Common Equity Tier 1 Capital Required to be Well Capitalized		$ 241,659	$ 235,729
Common Equity Tier 1 Capital Required to be Well Capitalized to Risk Weighted Assets		6.50%	6.50%
Tier 1 Capital (to Average Assets):
Tier 1 Leverage Capital	[1]	$ 445,815	$ 425,672
Tier 1 Leverage Capital to Average Assets	[1]	8.71%	8.84%
Tier 1 Leverage Capital Required for Capital Adequacy Purposes	[1]	$ 204,724	$ 192,652
Tier 1 Leverage Capital Required for Capital Adequacy Purposes to Average Assets	[1]	4.00%	4.00%
Tier 1 Leverage Capital Required To Be Well Capitalized	[1]	$ 255,906	$ 240,815
Tier 1 Leverage Capital Required To Be Well Capitalized to Average Assets	[1]	5.00%	5.00%
[1]	Leverage ratio.

Derivative Financial Instrume_3

Derivative Financial Instruments (Narrative) (Details) $ in Thousands	Jun. 30, 2019USD ($)derivative_instrument	Dec. 31, 2018USD ($)derivative_instrument
Interest rate swaps [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	$ 60,000	$ 60,000
Interest rate swaps with customers [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	678,865	648,050
Mirror swaps with counterparties [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	678,865	648,050
Risk participation-in agreement [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	46,205	46,510
Foreign exchange contracts [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	2,763	2,784
Interest rate lock commitments [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	89,682	30,766
Forward sale commitments [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	$ 149,404	$ 61,993
Derivatives Designated as Cash Flow Hedging Instruments [Member] | Interest rate caps [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Number of instruments held | derivative_instrument	2	2
Notional amount	$ 22,700	$ 22,700
Interest rate cap interest rate	4.50%	4.50%
Derivatives Designated as Cash Flow Hedging Instruments [Member] | Interest rate swaps [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Number of instruments held | derivative_instrument	2	2
Notional amount	$ 60,000	$ 60,000
Derivatives Designated as Cash Flow Hedging Instruments [Member] | Interest rate floors [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Number of instruments held | derivative_instrument	3	3
Notional amount	$ 300,000	$ 300,000
Interest rate floor interest rate	1.00%	1.00%
Not Designated as Hedging Instrument [Member] | Interest rate swaps with customers [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	$ 678,900	$ 648,000
Not Designated as Hedging Instrument [Member] | Mirror swaps with counterparties [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	678,900	648,000
Not Designated as Hedging Instrument [Member] | Risk participation-out agreement [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	44,700	57,300
Not Designated as Hedging Instrument [Member] | Risk participation-in agreement [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	46,200	46,500
Not Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	$ 2,800	$ 2,800

Derivative Financial Instrume_4

Derivative Financial Instruments (Fair Value of Derivatives by Balance Sheet Location) (Details) - USD ($) $ in Thousands		Jun. 30, 2019	Dec. 31, 2018
Derivative Financial Instruments, Assets [Member]
Derivatives, Fair Value [Line Items]
Gross derivative positions		$ 28,534	$ 14,698
Amounts offset in balance sheet	[1]	551	10,732
Net amounts presented in balance sheet		27,983	3,966
Collateral pledged	[2]	0	0
Net amounts		27,983	3,966
Derivative Financial Instruments, Liabilities [Member]
Derivatives, Fair Value [Line Items]
Gross derivative positions		28,669	13,934
Amounts offset in balance sheet	[1]	551	10,732
Net amounts presented in balance sheet		28,118	3,202
Collateral pledged	[2]	25,303	1,460
Net amounts		2,815	1,742
Derivatives Designated as Cash Flow Hedging Instruments [Member] | Interest rate caps [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets designated as a cash flow hedge		0	20
Derivatives Designated as Cash Flow Hedging Instruments [Member] | Interest rate caps [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities designated as a cash flow hedge		0	0
Derivatives Designated as Cash Flow Hedging Instruments [Member] | Interest rate swaps [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets designated as a cash flow hedge		7	903
Derivatives Designated as Cash Flow Hedging Instruments [Member] | Interest rate swaps [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities designated as a cash flow hedge		724	0
Derivatives Designated as Cash Flow Hedging Instruments [Member] | Interest rate floors [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets designated as a cash flow hedge		120	37
Derivatives Designated as Cash Flow Hedging Instruments [Member] | Interest rate floors [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities designated as a cash flow hedge		0	0
Not Designated as Hedging Instrument [Member] | Interest rate swaps with customers [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets not designated		25,857	5,340
Not Designated as Hedging Instrument [Member] | Interest rate swaps with customers [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities not designated		429	7,719
Not Designated as Hedging Instrument [Member] | Mirror swaps with counterparties [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets not designated		420	7,592
Not Designated as Hedging Instrument [Member] | Mirror swaps with counterparties [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities not designated		25,955	5,392
Not Designated as Hedging Instrument [Member] | Risk participation agreements [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets not designated		1	0
Not Designated as Hedging Instrument [Member] | Risk participation agreements [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities not designated		1	0
Not Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets not designated		4	0
Not Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities not designated		0	7
Not Designated as Hedging Instrument [Member] | Interest rate lock commitments [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets not designated		2,102	806
Not Designated as Hedging Instrument [Member] | Interest rate lock commitments [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities not designated		0	0
Not Designated as Hedging Instrument [Member] | Forward sale commitments [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets not designated		23	0
Not Designated as Hedging Instrument [Member] | Forward sale commitments [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities not designated		$ 1,560	$ 816
[1]	Interest rate risk management contracts and loan related derivative contracts with counterparties are subject to master netting arrangements.
[2]	Collateral pledged to derivative counterparties is in the form of cash. Washington Trust may need to post additional collateral in the future in proportion to potential increases in unrealized loss positions.

Derivative Financial Instrume_5

Derivative Financial Instruments (Derivatives in Cash Flow Hedging Relationships, Effect in Statements of Income and Changes in Shareholders' Equity) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Net change in fair value of cash flow hedges	$ (622)	$ 365	$ (1,064)	$ 1,254
Interest rate caps [Member] | Cash Flow Hedge [Member] | Other Comprehensive Income (Loss) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net change in fair value of cash flow hedges	14	11	14	49
Interest rate swaps [Member] | Cash Flow Hedge [Member] | Other Comprehensive Income (Loss) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net change in fair value of cash flow hedges	(765)	294	(1,231)	1,133
Interest rate floors [Member] | Cash Flow Hedge [Member] | Other Comprehensive Income (Loss) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net change in fair value of cash flow hedges	$ 129	$ 60	$ 153	$ 72

Derivative Financial Instrume_6

Derivative Financial Instruments (Derivatives not Designated as Hedging Instruments, Effect in Statements of Income) (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	$ (83)	$ 777	$ 897	$ 2,222
Interest rate swaps with customers [Member] | Loan related derivative income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	16,974	(3,001)	27,284	(12,196)
Mirror swaps with counterparties [Member] | Loan related derivative income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	(16,246)	3,645	(25,850)	12,969
Risk participation agreements [Member] | Loan related derivative income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	0	0	0	0
Foreign exchange contracts [Member] | Loan related derivative income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	18	24	36	36
Interest rate lock commitments [Member] | Mortgage banking revenues [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	610	191	1,295	177
Forward sale commitments [Member] | Mortgage banking revenues [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	$ (1,439)	$ (82)	$ (1,868)	$ 1,236

Fair Value Measurements (Narrat

Fair Value Measurements (Narrative) (Details) - USD ($) $ in Thousands		Aug. 01, 2015	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Payment of contingent consideration liability			$ 0	$ 1,217
Contingent consideration liability					$ 0
Recorded Investment of Impaired Loans with Related Allowance	[1]		1,185		523
Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Recorded Investment of Impaired Loans with Related Allowance			768		883
Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Recorded Investment of Impaired Loans with Related Allowance			768		883
Allowance For Loan Loss Allocation on Collateral Dependent Impaired Loans			$ 20		$ 24
Contingent Consideration [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Earn-out period post acquisition		5 years
[1]	The recorded investment in impaired loans consists of unpaid principal balance, net of charge-offs, interest payments received applied to principal and unamortized deferred loan origination fees and costs. For accruing impaired loans (troubled debt restructurings for which management has concluded that the collectibility of the loan is not in doubt), the recorded investment also includes accrued interest.

Fair Value Measurements (Fair V

Fair Value Measurements (Fair Value Mortgage Loans Held For Sale Disclosures) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Mortgage loans held for sale, measured at fair value	$ 39,996		$ 39,996		$ 20,996
Mortgage loans held for sale, amortized cost	38,953		38,953		20,498
Mortgage loans held for sale, difference between fair value and amortized cost	1,043		1,043		$ 498
Mortgage Loans Held for Sale [Member]
Change in fair value under fair value option election	$ 679	$ 441	$ 544	$ 112

Fair Value Measurements (Assets

Fair Value Measurements (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	$ 969,168	$ 927,810
Mortgage loans held for sale, measured at fair value	39,996	20,996
Obligations of U.S. government-sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	237,427	242,683
Mortgage-backed securities issued by U.S. government-sponsored agencies and U.S. government-sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	707,180	660,793
Obligations of states and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	90	937
Individual name issuer trust preferred debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	12,301	11,772
Corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	12,170	11,625
Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale, measured at fair value	39,996	20,996
Derivative assets	27,983	3,966
Total assets at fair value on a recurring basis	1,037,147	952,772
Derivative liabilities	28,118	3,202
Total liabilities at fair value on a recurring basis	28,118	3,202
Recurring [Member] | Obligations of U.S. government-sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	237,427	242,683
Recurring [Member] | Mortgage-backed securities issued by U.S. government-sponsored agencies and U.S. government-sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	707,180	660,793
Recurring [Member] | Obligations of states and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	90	937
Recurring [Member] | Individual name issuer trust preferred debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	12,301	11,772
Recurring [Member] | Corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	12,170	11,625
Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale, measured at fair value	0	0
Derivative assets	0	0
Total assets at fair value on a recurring basis	0	0
Derivative liabilities	0	0
Total liabilities at fair value on a recurring basis	0	0
Recurring [Member] | Level 1 [Member] | Obligations of U.S. government-sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	0	0
Recurring [Member] | Level 1 [Member] | Mortgage-backed securities issued by U.S. government-sponsored agencies and U.S. government-sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	0	0
Recurring [Member] | Level 1 [Member] | Obligations of states and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	0	0
Recurring [Member] | Level 1 [Member] | Individual name issuer trust preferred debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	0	0
Recurring [Member] | Level 1 [Member] | Corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	0	0
Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale, measured at fair value	39,996	20,996
Derivative assets	27,983	3,966
Total assets at fair value on a recurring basis	1,037,147	952,772
Derivative liabilities	28,118	3,202
Total liabilities at fair value on a recurring basis	28,118	3,202
Recurring [Member] | Level 2 [Member] | Obligations of U.S. government-sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	237,427	242,683
Recurring [Member] | Level 2 [Member] | Mortgage-backed securities issued by U.S. government-sponsored agencies and U.S. government-sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	707,180	660,793
Recurring [Member] | Level 2 [Member] | Obligations of states and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	90	937
Recurring [Member] | Level 2 [Member] | Individual name issuer trust preferred debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	12,301	11,772
Recurring [Member] | Level 2 [Member] | Corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	12,170	11,625
Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale, measured at fair value	0	0
Derivative assets	0	0
Total assets at fair value on a recurring basis	0	0
Derivative liabilities	0	0
Total liabilities at fair value on a recurring basis	0	0
Recurring [Member] | Level 3 [Member] | Obligations of U.S. government-sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	0	0
Recurring [Member] | Level 3 [Member] | Mortgage-backed securities issued by U.S. government-sponsored agencies and U.S. government-sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	0	0
Recurring [Member] | Level 3 [Member] | Obligations of states and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	0	0
Recurring [Member] | Level 3 [Member] | Individual name issuer trust preferred debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	0	0
Recurring [Member] | Level 3 [Member] | Corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	$ 0	$ 0

Fair Value Measurements (Asset

Fair Value Measurements (Asset and Liabilities Measured on a Nonrecurring Basis) (Details) - USD ($) $ in Thousands		Jun. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	[1]	$ 1,185	$ 523
Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans		768	883
Property acquired through foreclosure or repossession			2,142
Total assets at fair value on a nonrecurring basis		768	3,025
Nonrecurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans		0	0
Property acquired through foreclosure or repossession			0
Total assets at fair value on a nonrecurring basis		0	0
Nonrecurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans		0	0
Property acquired through foreclosure or repossession			0
Total assets at fair value on a nonrecurring basis		0	0
Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans		768	883
Property acquired through foreclosure or repossession			2,142
Total assets at fair value on a nonrecurring basis		$ 768	$ 3,025
[1]	The recorded investment in impaired loans consists of unpaid principal balance, net of charge-offs, interest payments received applied to principal and unamortized deferred loan origination fees and costs. For accruing impaired loans (troubled debt restructurings for which management has concluded that the collectibility of the loan is not in doubt), the recorded investment also includes accrued interest.

Fair Value Measurements (Qualit

Fair Value Measurements (Qualitative Information About Level 3 Assets Measured at Fair Value on a Nonrecurring Basis) (Details) - USD ($) $ in Thousands		6 Months Ended	12 Months Ended
		Jun. 30, 2019	Dec. 31, 2018
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Collateral dependent impaired loans	[1]	$ 1,185	$ 523
Nonrecurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Collateral dependent impaired loans		768	883
Property acquired through foreclosure or repossession			2,142
Nonrecurring [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Collateral dependent impaired loans		$ 768	883
Property acquired through foreclosure or repossession			$ 2,142
Nonrecurring [Member] | Minimum [Member] | Appraisals Of Collateral [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Appraisal adjustments	[2]		0.00%
Nonrecurring [Member] | Minimum [Member] | Collateral Dependent Impaired Loans [Member] | Appraisals Of Collateral [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Discount for costs to sell		0.00%	0.00%
Appraisal adjustments	[2]	0.00%
Nonrecurring [Member] | Minimum [Member] | Property Acquired Through Foreclosure Or Repossession [Member] | Appraisals Of Collateral [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Discount for costs to sell		0.00%	13.00%
Appraisal adjustments	[2]	0.00%	12.00%
Nonrecurring [Member] | Maximum [Member] | Appraisals Of Collateral [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Appraisal adjustments	[2]		100.00%
Nonrecurring [Member] | Maximum [Member] | Collateral Dependent Impaired Loans [Member] | Appraisals Of Collateral [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Discount for costs to sell		12.00%	10.00%
Appraisal adjustments	[2]	100.00%
Nonrecurring [Member] | Maximum [Member] | Property Acquired Through Foreclosure Or Repossession [Member] | Appraisals Of Collateral [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Discount for costs to sell		0.00%	13.00%
Appraisal adjustments	[2]	0.00%	28.00%
Nonrecurring [Member] | Weighted Average [Member] | Appraisals Of Collateral [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Appraisal adjustments	[2]		2.00%
Nonrecurring [Member] | Weighted Average [Member] | Collateral Dependent Impaired Loans [Member] | Appraisals Of Collateral [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Discount for costs to sell		12.00%	10.00%
Appraisal adjustments	[2]	16.00%
Nonrecurring [Member] | Weighted Average [Member] | Property Acquired Through Foreclosure Or Repossession [Member] | Appraisals Of Collateral [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Discount for costs to sell		0.00%	13.00%
Appraisal adjustments	[2]	0.00%	20.00%
[1]	The recorded investment in impaired loans consists of unpaid principal balance, net of charge-offs, interest payments received applied to principal and unamortized deferred loan origination fees and costs. For accruing impaired loans (troubled debt restructurings for which management has concluded that the collectibility of the loan is not in doubt), the recorded investment also includes accrued interest.
[2]	Management may adjust appraisal values to reflect market value declines or other discounts resulting from its knowledge of the property.

Fair Value Measurements (Carryi

Fair Value Measurements (Carrying Amounts and Estimated Fair Values of Financial Instruments) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held to maturity debt securities	$ 0	$ 10,415
Loans, net of allowance of loan losses	3,702,941	3,653,288
Federal Home Loan Bank advances	1,060,960	950,722
Junior subordinated debentures	22,681	22,681
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held to maturity debt securities		10,415
Loans, net of allowance of loan losses	3,702,941	3,653,288
Time deposits	1,284,538	1,255,108
Federal Home Loan Bank advances	1,060,960	950,722
Junior subordinated debentures	22,681	22,681
Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held to maturity debt securities		10,316
Loans, net of allowance of loan losses	3,693,614	3,598,025
Time deposits	1,302,002	1,269,433
Federal Home Loan Bank advances	1,066,411	950,691
Junior subordinated debentures	19,457	19,226
Fair Value Measurement [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held to maturity debt securities		0
Loans, net of allowance of loan losses	0	0
Time deposits	0	0
Federal Home Loan Bank advances	0	0
Junior subordinated debentures	0	0
Fair Value Measurement [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held to maturity debt securities		10,316
Loans, net of allowance of loan losses	0	0
Time deposits	1,302,002	1,269,433
Federal Home Loan Bank advances	1,066,411	950,691
Junior subordinated debentures	19,457	19,226
Fair Value Measurement [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held to maturity debt securities		0
Loans, net of allowance of loan losses	3,693,614	3,598,025
Time deposits	0	0
Federal Home Loan Bank advances	0	0
Junior subordinated debentures	$ 0	$ 0

Revenue from Contracts with C_3

Revenue from Contracts with Customers (Narrative) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Receivables from contracts with customers	$ 5,000	$ 4,800
Contract cost assets	$ 580	$ 458

Revenue from Contracts with C_4

Revenue from Contracts with Customers (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Net interest income	$ 33,858	$ 33,111	$ 68,442	$ 64,963
Asset-based wealth management revenues	9,141	9,136	18,062	19,091
Transaction-based wealth management revenues	408	466	739	784
Total wealth management revenues	9,549	9,602	18,801	19,875
Mortgage banking revenues	3,640	2,941	6,286	5,779
Card interchange fees	1,018	961	2,015	1,808
Service charges on deposit accounts	929	903	1,804	1,766
Loan related derivative income	746	668	1,470	809
Income from bank-owned life insurance	566	537	1,215	1,052
Net realized losses on securities	(80)	0	(80)	0
Other income	385	381	609	647
Total noninterest income	16,753	15,993	32,120	31,736
Total revenues	50,611	49,104	100,562	96,699
Revenue from Contracts with Customers [Member]
Net interest income	0	0	0	0
Asset-based wealth management revenues	9,141	9,136	18,062	19,091
Transaction-based wealth management revenues	408	466	739	784
Total wealth management revenues	9,549	9,602	18,801	19,875
Mortgage banking revenues	0	0	0	0
Card interchange fees	1,018	961	2,015	1,808
Service charges on deposit accounts	929	903	1,804	1,766
Loan related derivative income	0	0	0	0
Income from bank-owned life insurance	0	0	0	0
Net realized losses on securities	0	0	0	0
Other income	371	366	595	632
Total noninterest income	11,867	11,832	23,215	24,081
Total revenues	$ 11,867	$ 11,832	$ 23,215	$ 24,081

Revenue from Contracts with C_5

Revenue from Contracts with Customers (Disaggregation by Timing of Revenue Recognition) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Card interchange fees	$ 1,018	$ 961	$ 2,015	$ 1,808
Wealth management revenues	9,549	9,602	18,801	19,875
Service charges on deposit accounts	929	903	1,804	1,766
Other income	385	381	609	647
Total revenues	50,611	49,104	100,562	96,699
Revenue from Contracts with Customers [Member]
Card interchange fees	1,018	961	2,015	1,808
Wealth management revenues	9,549	9,602	18,801	19,875
Service charges on deposit accounts	929	903	1,804	1,766
Other income	371	366	595	632
Total revenues	11,867	11,832	23,215	24,081
Transferred at Point in Time [Member] | Revenue from Contracts with Customers [Member]
Card interchange fees	1,018	961	2,015	1,808
Service charges on deposit accounts	719	703	1,381	1,375
Other income	324	248	503	474
Transferred over Time [Member] | Revenue from Contracts with Customers [Member]
Wealth management revenues	9,549	9,602	18,801	19,875
Service charges on deposit accounts	210	200	423	391
Other income	$ 47	$ 118	$ 92	$ 158

Defined Benefit Pension Plans_2

Defined Benefit Pension Plans (Narrative) (Details)	120 Months Ended
	Dec. 30, 2023
Scenario, Forecast [Member]
Transition Period Pension Plan Amendment	10 years

Defined Benefit Pension Plans_3

Defined Benefit Pension Plans (Components of Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Qualified Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	[1]	$ 509	$ 561	$ 1,018	$ 1,122
Interest cost	[2]	742	678	1,484	1,357
Expected return on plan assets	[2]	(1,123)	(1,318)	(2,247)	(2,636)
Amortization of prior service (credit) cost	[2]	(4)	(5)	(8)	(11)
Recognized net actuarial loss	[2]	198	374	396	748
Net periodic benefit cost		322	290	643	580
Non-Qualified Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	[1]	32	27	63	54
Interest cost	[2]	141	118	282	237
Expected return on plan assets	[2]	0	0	0	0
Amortization of prior service (credit) cost	[2]	0	0	0	0
Recognized net actuarial loss	[2]	101	103	203	205
Net periodic benefit cost		$ 274	$ 248	$ 548	$ 496
[1]	Included in salaries and employee benefits expense in the Unaudited Consolidated Statements of Income.
[2]	Included in other expenses in the Unaudited Consolidated Statements of Income.

Defined Benefit Pension Plans_4

Defined Benefit Pension Plans (Weighted-Average Assumptions Used) (Details)	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Qualified Pension Plan [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Equivalent single discount rate for benefit obligations	4.38%	3.69%
Equivalent single discount rate for service cost	4.44%	3.76%
Equivalent single discount rate for interest cost	4.12%	3.42%
Expected long-term return on plan assets	5.75%	6.75%
Rate of compensation increase	3.75%	3.75%
Non-Qualified Retirement Plans [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Equivalent single discount rate for benefit obligations	4.28%	3.58%
Equivalent single discount rate for service cost	4.48%	3.79%
Equivalent single discount rate for interest cost	3.98%	3.22%
Rate of compensation increase	3.75%	3.75%

Share-Based Compensation (Narra

Share-Based Compensation (Narrative) (Details)	6 Months Ended
	Jun. 30, 2019$ / sharesshares
Performance Based Nonvested Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance share awards, grant date fair value | $ / shares	$ 52.83
Award vesting period	3 years
Performance share awards, shares vesting | shares	43,360
Time Based Nonvested Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Nonvested share units granted | shares	10,870
Nonvested share units weighted average grant date fair value | $ / shares	$ 51.43

Business Segments (Statement of

Business Segments (Statement of Operations and Total Assets by Reportable Segment) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Net interest income (expense)	$ 33,858	$ 33,111	$ 68,442	$ 64,963
Provision for loan losses	525	400	1,175	400
Net interest income after provision for loan losses	33,333	32,711	67,267	64,563
Noninterest income	16,753	15,993	32,120	31,736
Depreciation and amortization expense	1,074	1,050	2,150	2,125
Other noninterest expenses related to segments	27,077	25,238	52,965	51,293
Total noninterest expense	28,151	26,288	55,115	53,418
Income before income taxes	21,935	22,416	44,272	42,881
Income tax expense	4,662	4,742	9,504	8,996
Net income	17,273	17,674	34,768	33,885
Total assets	5,189,672	4,737,242	5,189,672	4,737,242	$ 5,010,766
Expenditures for long-lived assets	316	864	1,971	1,675
Commercial Banking [Member]
Segment Reporting Information [Line Items]
Net interest income (expense)	27,867	26,644	55,169	52,620
Provision for loan losses	525	400	1,175	400
Net interest income after provision for loan losses	27,342	26,244	53,994	52,220
Noninterest income	6,690	5,837	12,146	10,773
Depreciation and amortization expense	672	637	1,342	1,274
Other noninterest expenses related to segments	16,660	15,509	32,421	30,975
Total noninterest expense	17,332	16,146	33,763	32,249
Income before income taxes	16,700	15,935	32,377	30,744
Income tax expense	3,603	3,387	7,024	6,490
Net income	13,097	12,548	25,353	24,254
Total assets	3,916,915	3,647,649	3,916,915	3,647,649
Expenditures for long-lived assets	297	801	1,597	1,252
Wealth Management Services [Member]
Segment Reporting Information [Line Items]
Net interest income (expense)	(120)	(77)	(247)	(135)
Provision for loan losses	0	0	0	0
Net interest income after provision for loan losses	(120)	(77)	(247)	(135)
Noninterest income	9,557	9,602	18,808	19,875
Depreciation and amortization expense	363	370	729	766
Other noninterest expenses related to segments	6,937	6,593	13,414	13,792
Total noninterest expense	7,300	6,963	14,143	14,558
Income before income taxes	2,137	2,562	4,418	5,182
Income tax expense	582	655	1,199	1,298
Net income	1,555	1,907	3,219	3,884
Total assets	77,757	68,009	77,757	68,009
Expenditures for long-lived assets	0	11	292	313
Corporate [Member]
Segment Reporting Information [Line Items]
Net interest income (expense)	6,111	6,544	13,520	12,478
Provision for loan losses	0	0	0	0
Net interest income after provision for loan losses	6,111	6,544	13,520	12,478
Noninterest income	506	554	1,166	1,088
Depreciation and amortization expense	39	43	79	85
Other noninterest expenses related to segments	3,480	3,136	7,130	6,526
Total noninterest expense	3,519	3,179	7,209	6,611
Income before income taxes	3,098	3,919	7,477	6,955
Income tax expense	477	700	1,281	1,208
Net income	2,621	3,219	6,196	5,747
Total assets	1,195,000	1,021,584	1,195,000	1,021,584
Expenditures for long-lived assets	$ 19	$ 52	$ 82	$ 110

Other Comprehensive Income (L_3

Other Comprehensive Income (Loss) (Activity in Other Comprehensive Income) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Changes in fair value of available for sale debt securities, before tax		$ 7,807	$ (4,068)	$ 22,213	$ (17,681)
Changes in fair value of available for sale debt securities, tax		1,835	(956)	5,220	(4,155)
Changes in fair value of available for sale debt securities		5,972	(3,112)	16,993	(13,526)
Net gains (losses) on debt securities reclassified into earnings, before tax	[1]	(80)	0	(80)	0
Net gains (losses) on debt securities reclassified into earnings, tax	[1]	(19)	0	(19)	0
Net gains (losses) on debt securities reclassified into earnings	[1]	(61)	0	(61)	0
Net change in fair value of available for sale debt securities, before tax		7,887	(4,068)	22,293	(17,681)
Net change in fair value of available for sale debt securities, tax		1,854	(956)	5,239	(4,155)
Net change in fair value of available for sale debt securities		6,033	(3,112)	17,054	(13,526)
Change in fair value of cash flow hedges, before tax		(824)	455	(1,370)	1,258
Change in fair value of cash flow hedges, tax		(194)	107	(322)	198
Change in fair value of cash flow hedges		(630)	348	(1,048)	1,060
Net cash flow hedge losses reclassified into earnings, before tax	[2]	10	21	(21)	252
Net cash flow hedge losses reclassified into earnings, tax	[2]	2	4	(5)	58
Net cash flow hedge losses reclassified into earnings	[2]	8	17	(16)	194
Net change in fair value of cash flow hedges, before tax		(814)	476	(1,391)	1,510
Net change in fair value of cash flow hedges, tax		(192)	111	(327)	256
Net change in fair value of cash flow hedges		(622)	365	(1,064)	1,254
Amortization of net actuarial losses, before tax	[3]	300	477	600	953
Amortization of net actuarial losses, tax	[3]	71	113	141	225
Amortization of net actuarial losses	[3]	229	364	459	728
Amortization of net prior service credits, before tax	[3]	(4)	(5)	(8)	(11)
Amortization of net prior service credits, tax	[3]	(1)	(1)	(2)	(3)
Amortization of net prior service credits	[3]	(3)	(4)	(6)	(8)
Net change in defined benefit plan obligations, before tax		296	472	592	942
Net change in defined benefit plan obligations, tax		70	112	139	222
Net change in defined benefit plan obligations		226	360	453	720
Total other comprehensive income (loss), before tax		7,369	(3,120)	21,494	(15,229)
Total other comprehensive income (loss), tax		1,732	(733)	5,051	(3,677)
Total other comprehensive income (loss), net of tax		$ 5,637	$ (2,387)	$ 16,443	$ (11,552)
[1]	The pre-tax amount is reported as net realized losses on securities in the Unaudited Consolidated Statements of Income.
[2]	The pre-tax amounts are included in interest expense on FHLB advances, interest expense on junior subordinated debentures and interest and fees on loans in the Unaudited Consolidated Statements of Income.
[3]	The pre-tax amounts are included in other expenses in the Unaudited Consolidated Statements of Income.

Other Comprehensive Income (L_4

Other Comprehensive Income (Loss) (Components of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Accumulated other comprehensive income (loss), beginning balance	$ (17,503)	$ (32,675)	$ (28,309)	$ (23,510)
Other comprehensive income (loss) before reclassifications	5,342	(2,764)	15,945	(12,466)
Amounts reclassed from accumulated other comprehensive income (loss)	295	377	498	914
Total other comprehensive income (loss), net of tax	5,637	(2,387)	16,443	(11,552)
Accumulated other comprehensive income (loss), ending balance	(11,866)	(35,062)	(11,866)	(35,062)
Net Unrealized Gains (Losses) on AFS Securities [Member]
Accumulated other comprehensive income (loss), beginning balance	(5,741)	(17,948)	(16,762)	(7,534)
Other comprehensive income (loss) before reclassifications	5,972	(3,112)	16,993	(13,526)
Amounts reclassed from accumulated other comprehensive income (loss)	61	0	61	0
Total other comprehensive income (loss), net of tax	6,033	(3,112)	17,054	(13,526)
Accumulated other comprehensive income (loss), ending balance	292	(21,060)	292	(21,060)
Net Unrealized Losses on Cash Flow Hedges [Member]
Accumulated other comprehensive income (loss), beginning balance	(251)	461	191	(428)
Other comprehensive income (loss) before reclassifications	(630)	348	(1,048)	1,060
Amounts reclassed from accumulated other comprehensive income (loss)	8	17	(16)	194
Total other comprehensive income (loss), net of tax	(622)	365	(1,064)	1,254
Accumulated other comprehensive income (loss), ending balance	(873)	826	(873)	826
Pension Benefit Adjustment [Member]
Accumulated other comprehensive income (loss), beginning balance	(11,511)	(15,188)	(11,738)	(15,548)
Other comprehensive income (loss) before reclassifications	0	0	0	0
Amounts reclassed from accumulated other comprehensive income (loss)	226	360	453	720
Total other comprehensive income (loss), net of tax	226	360	453	720
Accumulated other comprehensive income (loss), ending balance	$ (11,285)	$ (14,828)	$ (11,285)	$ (14,828)

Earning Per Common Share (Calcu

Earning Per Common Share (Calculation of Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Net income	$ 17,273	$ 17,674	$ 34,768	$ 33,885
Less dividends and undistributed earnings allocated to participating securities	(35)	(38)	(69)	(76)
Net income applicable to common shareholders	$ 17,238	$ 17,636	$ 34,699	$ 33,809
Weighted average common shares outstanding - basic	17,330,000	17,272,000	17,317,000	17,253,000
Basic earnings per common share	$ 0.99	$ 1.02	$ 2	$ 1.96
Less dividends and undistributed earnings allocated to participating securities	$ (35)	$ (38)	$ (69)	$ (76)
Net income applicable to common shareholders	$ 17,238	$ 17,636	$ 34,699	$ 33,809
Dilutive effect of common stock equivalents	75,000	115,000	86,000	131,000
Weighted average common shares outstanding - diluted	17,405,000	17,387,000	17,403,000	17,384,000
Diluted earnings per common share	$ 0.99	$ 1.01	$ 1.99	$ 1.94
Antidilutive common stock equivalents	87,950	43,871	87,863	48,956

Leases (Narrative) (Details)

Leases (Narrative) (Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended			12 Months Ended
		Jun. 30, 2019		Jun. 30, 2018	Jun. 30, 2019		Jun. 30, 2018	Dec. 31, 2018	Jan. 01, 2019
Operating lease right-of-use assets		$ 28,174			$ 28,174			$ 0	$ 28,900
Operating lease liabilities		$ 30,210	[1]		$ 30,210	[1]		$ 0	$ 30,900
Operating lease weighted average discount rate		3.66%			3.66%
Operating leases, weighted average lease term		14 years 2 months 12 days			14 years 2 months 12 days
Operating lease rent expense	[2]	$ 940		$ 938	$ 1,879		$ 1,900
Options to extend reasonably certain of being exercised					4,200
Short-term operating lease liabilities		$ 2,500			$ 2,500
Minimum [Member]
Lease Expiration Period					3 months			5 months
Operating lease renewal term		1 year			1 year
Lease Expiration Period, Renewal Option								1 year
Maximum [Member]
Lease Expiration Period					22 years			22 years
Operating lease renewal term		5 years			5 years
Lease Expiration Period, Renewal Option								5 years
[1]	Includes short-term operating lease liabilities of $2.5 million .
[2]	Included in net occupancy expenses in the Unaudited Consolidated Income Statement.

Leases (Schedule of Operating L

Leases (Schedule of Operating Lease Payments) (Details) - USD ($) $ in Thousands		Jun. 30, 2019		Jan. 01, 2019	Dec. 31, 2018
Leases [Abstract]
Operating lease minimum payments, Due Current Year		$ 1,856
Operating lease minimum payments, Due Year Two		3,515
Operating lease minimum payments, Due Year Three		3,312
Operating lease minimum payments, Due Year Four		3,165
Operating lease minimum payments, Due Year Five		3,090
Operating lease minimum payments, Due after Year Five		24,716
Total operating lease payments	[1]	39,654
Interest		9,444
Present value of operating lease liabilities		$ 30,210	[2]	$ 30,900	$ 0
[1]	Includes $4.2 million related to options to extend lease terms that are reasonably certain of being exercised.
[2]	Includes short-term operating lease liabilities of $2.5 million .

Leases (Lease Cost and Cash Pai

Leases (Lease Cost and Cash Paid) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Leases [Abstract]
Operating lease cost		$ 928		$ 1,856
Variable lease cost		12		23
Total lease cost	[1]	940	$ 938	1,879	$ 1,900
Cash paid reducing operating lease liabilities		$ 831		$ 1,751
[1]	Included in net occupancy expenses in the Unaudited Consolidated Income Statement.

Leases (Future Minimum Lease Pa

Leases (Future Minimum Lease Payments) (Details) $ in Thousands	Dec. 31, 2018USD ($)
Leases [Abstract]
Future minimum lease payments, Next Twelve Months	$ 3,544
Future minimum lease payments, Two Years	2,980
Future minimum lease payments, Three Years	2,677
Future minimum lease payments, Four Years	2,293
Future minimum lease payments, Five Years	2,059
Future minimum lease payments, Thereafter	22,648
Total minimum lease payments	$ 36,201

Commitments and Contingencies_2

Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Commitments to extend credit on standby letters of credit [Member] | Commitments to extend credit [Member]
Commitments and Contingencies Disclosure [Line Items]
Contract amount	$ 9,189	$ 7,706

Commitments and Contingencies_3

Commitments and Contingencies (Financial Instruments with Off Balance Sheet Risk) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Interest rate lock commitments [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	$ 89,682	$ 30,766
Forward sale commitments [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	149,404	61,993
Interest rate swaps with customers [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	678,865	648,050
Mirror swaps with counterparties [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	678,865	648,050
Risk participation-in agreement [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	46,205	46,510
Foreign exchange contracts [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	2,763	2,784
Interest rate swaps [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	60,000	60,000
Commitments to extend credit on commerical loans [Member] | Commitments to extend credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract amount	480,851	533,884
Commitments to extend credit on home equity lines [Member] | Commitments to extend credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract amount	285,601	270,462
Commitments to extend credit on other loans [Member] | Commitments to extend credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract amount	87,343	46,698
Commitments to extend credit on standby letters of credit [Member] | Commitments to extend credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract amount	$ 9,189	$ 7,706