Washington Trust Bancorp (WASH) 10-Q 8 Nov 21 2021 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2021	Oct. 31, 2021
Cover [Abstract]
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	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	Sep. 30, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
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		17,327,584
Entity Tax Identification Number	05-0404671
Entity Address, Postal Zip Code	02891

CONSOLIDATED BALANCE SHEETS (Un

CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands		Sep. 30, 2021		Dec. 31, 2020
Assets:
Cash and due from banks		$ 297,039		$ 194,143
Short-term investments		3,349		8,125
Mortgage loans held for sale, at fair value		48,705		61,614
Available for sale debt securities, fair value		1,045,833		894,571
Federal Home Loan Bank stock, at cost		15,094		30,285
Loans:
Total loans	[1]	4,286,404		4,195,990
Less: allowance for credit losses on loans		41,711		44,106
Net loans		4,244,693		4,151,884
Premises and equipment, net		28,488		28,870
Operating lease right-of-use assets		27,518		29,521
Investment in bank-owned life insurance		92,974		84,193
Goodwill		63,909		63,909
Identifiable intangible assets, net		5,631		6,305
Other assets		129,410		159,749
Total assets		6,002,643		5,713,169
Liabilities:
Noninterest-bearing deposits		950,974		832,287
Interest-bearing deposits		4,107,168		3,546,066
Total deposits		5,058,142		4,378,353
Federal Home Loan Bank advances		222,592		593,859
Junior subordinated debentures		22,681		22,681
Operating lease liabilities		29,810	[2]	31,717
Other liabilities		114,100		152,364
Total liabilities		5,447,325		5,178,974
Commitments and contingencies (Note 18)
Shareholders' Equity:
Common stock		1,085		1,085
Paid-in capital		126,265		125,610
Retained earnings		447,566		418,246
Accumulated other comprehensive income (loss)		(18,128)		(7,391)
Treasury stock, at cost		(1,470)		(3,355)
Total shareholders' equity		555,318		534,195
Total liabilities and shareholders’ equity		$ 6,002,643		$ 5,713,169
[1]	Includes net unamortized loan origination costs of $5.0 million and $1.5 million, respectively, at September 30, 2021 and December 31, 2020 and net unamortized premiums on purchased loans of $489 thousand and $787 thousand, respectively, at September 30, 2021 and December 31, 2020.
[2]	Includes short-term operating lease liabilities of $3.1 million.

CONSOLIDATED BALANCE SHEETS (_2

CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Available for sale debt securities, amortized cost	$ 1,049,044	$ 881,570
Available for sale debt securities, allowance for credit losses	$ 0	$ 0
Common stock, par value	$ 0.0625	$ 0.0625
Common stock, shares authorized	60,000,000	60,000,000
Common stock, shares issued	17,363,457	17,363,457
Common stock, shares outstanding	17,320,449	17,265,337
Treasury stock, shares	43,008	98,120

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Interest income:
Interest and fees on loans		$ 35,691	$ 34,925	$ 104,670	$ 110,938
Interest on mortgage loans held for sale		298	468	1,144	1,193
Taxable interest on debt securities		3,683	4,870	10,366	16,181
Dividends on Federal Home Loan Bank stock		95	532	338	1,826
Other interest income		56	39	121	424
Total interest and dividend income		39,823	40,834	116,639	130,562
Interest expense:
Deposits		2,789	5,532	9,413	21,180
Federal Home Loan Bank advances		872	3,354	3,253	13,501
Junior subordinated debentures		92	135	278	519
Other interest expense		0	159	0	161
Total interest expense		3,753	9,180	12,944	35,361
Net interest income	[1]	36,070	31,654	103,695	95,201
Provision for credit losses		0	1,325	(2,000)	10,561
Net interest income after provision for credit losses		36,070	30,329	105,695	84,640
Noninterest income:
Wealth management revenues	[1]	10,455	8,954	30,778	26,248
Mortgage banking revenues	[1]	6,373	12,353	24,294	33,300
Card interchange fees	[1]	1,265	1,161	3,714	3,139
Service charges on deposit accounts	[1]	673	598	1,917	1,975
Loan related derivative income	[1]	728	1,264	2,370	3,818
Income from bank-owned life insurance	[1]	618	567	1,781	1,922
Other income	[1]	408	571	2,233	1,313
Total noninterest income	[1]	20,520	25,468	67,087	71,715
Noninterest expense:
Salaries and employee benefits		22,162	21,892	65,771	60,824
Outsourced services		3,294	3,160	9,711	8,944
Net occupancy		2,134	2,012	6,304	5,940
Equipment		977	934	2,946	2,806
Legal, audit and professional fees		767	1,252	2,042	2,733
FDIC deposit insurance costs		482	392	1,201	1,488
Advertising and promotion		559	384	1,341	829
Amortization of intangibles		223	228	674	688
Debt prepayment penalties		0	0	4,230	0
Other expenses		1,922	2,090	6,025	7,023
Total noninterest expense		32,520	32,344	100,245	91,275
Income (loss) before income taxes		24,070	23,453	72,537	65,080
Income tax expense		5,319	5,131	15,855	13,817
Net income		18,751	18,322	56,682	51,263
Net income available to common shareholders		$ 18,697	$ 18,285	$ 56,520	$ 51,154
Weighted average common shares outstanding - basic		17,320	17,260	17,303	17,287
Weighted average common shares outstanding - diluted		17,444	17,317	17,451	17,369
Per share information:
Basic earnings per common share		$ 1.08	$ 1.06	$ 3.27	$ 2.96
Diluted earnings per common share		$ 1.07	$ 1.06	$ 3.24	$ 2.95
[1]	As reported in the Consolidated Statements of Income.

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 18,751	$ 18,322	$ 56,682	$ 51,263
Other comprehensive income (loss), net of tax:
Net change in fair value of available for sale debt securities	(3,137)	(3,505)	(12,322)	7,493
Net change in fair value of cash flow hedges, net of tax	(403)	154	(36)	(888)
Net change in defined benefit plan obligations	540	410	1,621	1,229
Total other comprehensive income (loss), net of tax	(3,000)	(2,941)	(10,737)	7,834
Total comprehensive income	$ 15,751	$ 15,381	$ 45,945	$ 59,097

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]
Common stock, shares outstanding at Dec. 31, 2019		17,363,000
Shareholders' equity at Dec. 31, 2019	$ 503,492	$ 1,085	$ 123,281	$ 390,363	$ (11,237)	$ 0
Shareholders' equity (Accounting Standards Update 2016-13) at Dec. 31, 2019	(6,108)			(6,108)
Net income	51,263			51,263
Total other comprehensive income (loss), net of tax	7,834				7,834
Cash dividends declared	(26,745)			(26,745)
Share-based compensation	2,696		2,696
Exercise of stock options and issuance of other compensation-related equity awards, net of awards surrendered, shares		22,000
Exercise of stock options and issuance of other compensation-related equity awards, net of awards surrendered, value	(417)	$ 0	(1,209)			792
Treasury stock purchased under 2019 Stock Repurchase Program, shares acquired		(125,000)
Treasury stock purchased under 2019 Stock Repurchase Program, amount acquired	(4,322)					(4,322)
Common stock, shares outstanding at Sep. 30, 2020		17,260,000
Shareholders' equity at Sep. 30, 2020	527,693	$ 1,085	124,768	408,773	(3,403)	(3,530)
Common stock, shares outstanding at Jun. 30, 2020		17,260,000
Shareholders' equity at Jun. 30, 2020	520,163	$ 1,085	123,684	399,386	(462)	(3,530)
Net income	18,322			18,322
Total other comprehensive income (loss), net of tax	(2,941)				(2,941)
Cash dividends declared	(8,935)			(8,935)
Share-based compensation	1,083		1,083
Exercise of stock options and issuance of other compensation-related equity awards, net of awards surrendered, shares		0
Exercise of stock options and issuance of other compensation-related equity awards, net of awards surrendered, value	1	$ 0	1			0
Common stock, shares outstanding at Sep. 30, 2020		17,260,000
Shareholders' equity at Sep. 30, 2020	$ 527,693	$ 1,085	124,768	408,773	(3,403)	(3,530)
Common stock, shares outstanding at Dec. 31, 2020	17,265,337	17,265,000
Shareholders' equity at Dec. 31, 2020	$ 534,195	$ 1,085	125,610	418,246	(7,391)	(3,355)
Net income	56,682			56,682
Total other comprehensive income (loss), net of tax	(10,737)				(10,737)
Cash dividends declared	(27,362)			(27,362)
Share-based compensation	2,705		2,705
Exercise of stock options and issuance of other compensation-related equity awards, net of awards surrendered, shares		55,000
Exercise of stock options and issuance of other compensation-related equity awards, net of awards surrendered, value	$ (165)	$ 0	(2,050)			1,885
Common stock, shares outstanding at Sep. 30, 2021	17,320,449	17,320,000
Shareholders' equity at Sep. 30, 2021	$ 555,318	$ 1,085	126,265	447,566	(18,128)	(1,470)
Common stock, shares outstanding at Jun. 30, 2021		17,320,000
Shareholders' equity at Jun. 30, 2021	547,856	$ 1,085	125,442	437,927	(15,128)	(1,470)
Net income	18,751			18,751
Total other comprehensive income (loss), net of tax	(3,000)				(3,000)
Cash dividends declared	(9,112)			(9,112)
Share-based compensation	823		823
Exercise of stock options and issuance of other compensation-related equity awards, net of awards surrendered, shares		0
Exercise of stock options and issuance of other compensation-related equity awards, net of awards surrendered, value	$ 0	$ 0	0			0
Common stock, shares outstanding at Sep. 30, 2021	17,320,449	17,320,000
Shareholders' equity at Sep. 30, 2021	$ 555,318	$ 1,085	$ 126,265	$ 447,566	$ (18,128)	$ (1,470)

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Stockholders' Equity [Abstract]
Cash dividends declared per share	$ 0.52	$ 0.51	$ 1.56	$ 1.53

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net income		$ 56,682	$ 51,263
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses		(2,000)	10,561
Depreciation of premises and equipment		2,549	2,318
Net amortization of premiums and discounts on securities and loans		2,742	4,101
Amortization of intangibles		674	688
Share-based compensation		2,705	2,696
Tax benefit (expense) from stock option exercises and other equity awards		135	(70)
Income from bank-owned life insurance	[1]	(1,781)	(1,922)
Net gains on loan sales, including changes in fair value		(24,093)	(33,799)
Proceeds from sales of loans, net		706,253	586,677
Loans originated for sale		(634,451)	(599,789)
(Increase) decrease in operating lease right-of-use assets		2,003	(3,069)
Increase (decrease) in operating lease liabilities		(1,907)	3,151
(Increase) decrease in other assets		34,107	(67,262)
Increase (decrease) in other liabilities		(36,698)	62,634
Net cash provided by (used in) operating activities		106,920	18,178
Cash flows from investing activities:
Purchases of mortgage-backed securities available for sale		(297,810)	(247,957)
Purchases of other debt securities available for sale		(221,166)	(129,000)
Maturities, calls and principal payments of mortgage-backed securities available for sale		274,169	228,268
Maturities, calls and principal payments of other debt securities available for sale		70,500	140,500
Net redemption (purchases) of Federal Home Loan Bank stock		15,191	13,384
Net (increase) decrease in loans		(80,021)	(332,850)
Purchases of loans		(41,546)	(51,081)
Proceeds from the sale of property acquired through foreclosure or repossession		0	1,107
Purchases of premises and equipment		(2,166)	(1,331)
Purchases of bank-owned life insurance		(7,000)	0
Proceeds from surrender of bank-owned life insurance		0	787
Net cash provided by (used in) investing activities		(289,849)	(378,173)
Cash flows from financing activities:
Net increase (decrease) in deposits		679,789	786,811
Proceeds from Federal Home Loan Bank advances		1,173,000	1,592,500
Repayment of Federal Home Loan Bank advances		(1,544,267)	(2,020,096)
Proceeds from Payment Protection Program Lending Facility		0	200,628
Repayment of Payment Protection Program Lending Facility		0	(94,882)
Treasury stock purchased		0	(4,322)
Net proceeds from stock option exercises and issuance of other equity awards, net of awards surrendered		(165)	(417)
Cash dividends paid		(27,308)	(26,667)
Net cash provided by (used in) financing activities		281,049	433,555
Net increase (decrease) in cash and cash equivalents		98,120	73,560
Cash and cash equivalents at beginning of period		202,268	138,455
Cash and cash equivalents at end of period		300,388	212,015
Noncash Activities:
Loans charged off		630	1,072
Loans transferred to property acquired through foreclosure or repossession		0	28
Supplemental Disclosures:
Interest payments		14,675	36,868
Income tax payments		$ 15,551	$ 15,039
[1]	As reported in the Consolidated Statements of Income.

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	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 financial institution 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. 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 in consolidation. 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 investment in the capital trusts, which is 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. Material estimates that are particularly susceptible to change are the determination of the allowance for credit losses on loans, the valuation of goodwill and identifiable intangible assets and the accounting for defined benefit pension plans. 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, 2020.

Recently Issued Accounting Pron

Recently Issued Accounting Pronouncements	9 Months Ended
	Sep. 30, 2021
Accounting Standards Update and Change in Accounting Principle [Abstract]
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements Accounting Standards Adopted in 2021 Income Taxes - ASC 745 Accounting Standards Update No. 2019-12, “Income Taxes - Simplifying the Accounting for Income Taxes” (“ASU 2019-12”), was issued in December 2019 to simplify the accounting for income taxes. ASU 2019-12 is effective for fiscal years beginning after December 15, 2020, with early adoption permitted. Certain provisions under ASU 2019-12 require prospective application, some require modified retrospective application through a cumulative-effect adjustment to retained earnings as of the beginning of the year of adoption, while other provisions require retrospective application to all periods presented in the consolidated financial statements upon adoption. The Corporation adopted the provisions of ASU 2019-12 effective January 1, 2021 and the adoption did not have a material impact on the Corporation’s consolidated financial statements. Receivables - ASC 310 Accounting Standards Update No. 2020-08, “Codification Improvements to Subtopic 310-20, Receivables – Nonrefundable Fees and Other Costs” (“ASU 2020-08”), was issued in October 2020 to provide further clarification and update the previously issued guidance in ASU 2017-08, “Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20: Premium Amortization on Purchased Callable Debt Securities” (“ASU 2017-08”). ASU 2017-08 shortened the amortization period for certain callable debt securities purchased at a premium by requiring that the premium be amortized to the earliest call date. The Corporation early adopted the provisions of ASU 2017-08, effective January 1, 2017. ASU 2020-08 requires that at each reporting period, to the extent that the amortized cost of an individual callable debt security exceeds the amount repayable by the issuer at the next call date, the excess premium shall be amortized to the next call date. ASU 2020-08 is effective for fiscal years ending after December 15, 2020 and early adoption is not permitted. The provisions under ASU 2020-08 are required to be applied prospectively. The Corporation adopted the provisions of ASU 2020-08 effective January 1, 2021 and the adoption did not have an impact on the Corporation’s consolidated financial statements. Accounting Standards Pending Adoption There were no recently issued accounting pronouncements, applicable to the Corporation, that are pending adoption as of September 30, 2021.

Cash and Due from Banks

Cash and Due from Banks	9 Months Ended
	Sep. 30, 2021
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 Federal Reserve Bank of Boston (“FRB”). Some or all of these reserve requirements may be satisfied with vault cash. Effective March 26, 2020, the FRB reduced the reserve requirement ratios to zero percent to eliminate the need for depository institutions, such as the Bank, to maintain balances in accounts at the FRB to satisfy reserve requirements. As a result, there were no reserve balances included in cash and due from banks in the Unaudited Consolidated Balance Sheets at September 30, 2021 and December 31, 2020. Cash and due from banks included interest-bearing deposits in other banks of $260.3 million and $138.4 million, respectively, at September 30, 2021 and December 31, 2020. Cash and due from banks balances also include cash collateral pledged to derivative counterparties. See Note 10 for additional disclosure regarding cash collateral pledged to derivative counterparties.

Securities

Securities	9 Months Ended
	Sep. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Securities	Securities Available for Sale Debt Securities The following tables present the amortized cost, gross unrealized holding gains, gross unrealized holding losses, allowance for credit losses (“ACL”) on securities and fair value of securities by major security type and class of security: (Dollars in thousands) September 30, 2021 Amortized Cost Unrealized Gains Unrealized Losses Allowance for Credit Losses Fair Value Available for Sale Debt Securities: Obligations of U.S. government-sponsored enterprises $181,044 $63 ($2,502) $— $178,605 Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 843,485 9,532 (9,315) — 843,702 Individual name issuer trust preferred debt securities 11,363 6 (213) — 11,156 Corporate bonds 13,152 — (782) — 12,370 Total available for sale debt securities $1,049,044 $9,601 ($12,812) $— $1,045,833 (Dollars in thousands) December 31, 2020 Amortized Cost Unrealized Gains Unrealized Losses Allowance for Credit Losses Fair Value Available for Sale Debt Securities: Obligations of U.S. government-sponsored enterprises $131,186 $628 ($145) $— $131,669 Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 725,890 14,942 (527) — 740,305 Individual name issuer trust preferred debt securities 13,341 — (672) — 12,669 Corporate bonds 11,153 — (1,225) — 9,928 Total available for sale debt securities $881,570 $15,570 ($2,569) $— $894,571 Amortized cost of available for sale debt securities excludes accrued interest receivable of $2.2 million and $2.4 million, respectively, as of September 30, 2021 and December 31, 2020. Accrued interest receivable is included in other assets in the Unaudited Consolidated Balance Sheets. As of September 30, 2021 and December 31, 2020, debt securities with a fair value of $344.3 million and $291.9 million, respectively, were pledged as collateral for Federal Home Loan Bank of Boston (“FHLB”) borrowings, potential borrowings with the FRB’s discount window, certain public deposits and for other purposes. See Note 8 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) September 30, 2021 Amortized Cost Fair Value Due in one year or less $177,689 $177,731 Due after one year to five years 410,399 410,341 Due after five years to ten years 366,885 364,137 Due after ten years 94,071 93,624 Total debt securities $1,049,044 $1,045,833 Included in the above table are debt securities with an amortized cost balance of $204.8 million and a fair value of $201.3 million at September 30, 2021 that are callable at the discretion of the issuers. Final maturities of the callable securities range from 3 years to 15 years, with call features ranging from 1 month to 1 year. Assessment of Available for Sale Debt Securities for Impairment Management assesses the decline in fair value of investment securities 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, vol atility of earnings of a specific issuer, or deterioration in credit quality of the issuer. Management evaluates both qualitative and quantitative factors to assess whether an impairment exists. A debt security is placed on nonaccrual status at the time any principal or interest payments become more than 90 days delinquent or if full collection of interest or principal becomes uncertain. Accrued interest for a debt security placed on nonaccrual is reversed against interest income. There were no debt securities on nonaccrual status at September 30, 2021 and 2020 and, therefore there was no accrued interest related to debt securities reversed against interest income for the three and nine months ended September 30, 2021 and 2020. The following tables summarize available for sale debt securities in an unrealized loss position, for which an allowance for credit losses on securities has not been recorded, segregated by length of time that the securities have been in a continuous unrealized loss position: (Dollars in thousands) Less than 12 Months 12 Months or Longer Total September 30, 2021 # Fair Unrealized # Fair Unrealized # Fair Unrealized Obligations of U.S. government-sponsored enterprises 14 $167,238 ($2,499) 1 $497 ($3) 15 $167,735 ($2,502) Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 36 506,511 (8,472) 12 46,265 (843) 48 552,776 (9,315) Individual name issuer trust preferred debt securities — — — 3 9,157 (213) 3 9,157 (213) Corporate bonds — — — 4 12,370 (782) 4 12,370 (782) Total 50 $673,749 ($10,971) 20 $68,289 ($1,841) 70 $742,038 ($12,812) (Dollars in thousands) Less than 12 Months 12 Months or Longer Total December 31, 2020 # Fair Unrealized # Fair Unrealized # Fair Unrealized Obligations of U.S. government-sponsored enterprises 6 $63,856 ($145) — $— $— 6 $63,856 ($145) Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 16 107,283 (527) — — — 16 107,283 (527) Individual name issuer trust preferred debt securities — — — 5 12,669 (672) 5 12,669 (672) Corporate bonds — — — 3 9,928 (1,225) 3 9,928 (1,225) Total 22 $171,139 ($672) 8 $22,597 ($1,897) 30 $193,736 ($2,569) 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 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 credit losses, 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. The issuers of these securities continue to make timely principal and interest payments and none of these securities were past due at September 30, 2021. Management believes that the unrealized losses on these debt securities 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 likely that the Corporation will not be required to sell these securities before recovery of their cost basis, which may be maturity. Therefore, no allowance for credits losses on securities was recorded at September 30, 2021. Individual Name Issuer Trust Preferred Debt Securities Included in debt securities in an unrealized loss position at September 30, 2021 were three trust preferred securities issued by three individual companies in the banking sector. Based on the information available through the filing date of this report, all individual name issuer trust preferred debt securities held in our portfolio continue to accrue interest and make payments as expected with no payment deferrals or defaults on the part of the issuers. Management reviewed the collectability 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. As of September 30, 2021, there were two individual name issuer trust preferred debt securities with an amortized cost of $4.0 million and unrealized losses of $140 thousand that were rated below investment grade by Standard & Poors, Inc. (“S&P”). We noted no additional downgrades to below investment grade between September 30, 2021 and the filing date of this report. Management believes the unrealized losses on these debt securities 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 likely that the Corporation will not be required to sell these securities before recovery of their cost basis, which may be maturity. Therefore, no allowance for credit losses on securities was recorded at September 30, 2021. Corporate Bonds At September 30, 2021, the Corporation had four corporate bond holdings with unrealized losses totaling $782 thousand. These investment grade corporate bonds were issued by large corporations in the financial services industry. The issuers of these securities continue to make timely principal and interest payments and none of these securities were past due at September 30, 2021. Management reviewed the collectability 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. Management believes the unrealized losses on these debt securities are primarily attributable

Loans

Loans	9 Months Ended
	Sep. 30, 2021
Receivables [Abstract]
Loans	Loans The following is a summary of loans: (Dollars in thousands) September 30, December 31, 2020 Commercial: Commercial real estate (1) $1,661,785 $1,633,024 Commercial & industrial (2) 682,774 817,408 Total commercial 2,344,559 2,450,432 Residential Real Estate: Residential real estate (3) 1,672,364 1,467,312 Consumer: Home equity 249,874 259,185 Other (4) 19,607 19,061 Total consumer 269,481 278,246 Total loans (5) $4,286,404 $4,195,990 (1) Commercial real estate (“CRE”) 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) Commercial and industrial (“C&I”) consists of loans to businesses and individuals, a portion of which are fully or partially collateralized by real estate. C&I also includes $77.4 million and $199.8 million, respectively, of PPP loans as of September 30, 2021 and December 31, 2020. (3) Residential real estate consists of mortgage and homeowner construction loans secured by one- to four-family residential properties. (4) Other consists of loans to individuals secured by general aviation aircraft and other personal installment loans. (5) Includes net unamortized loan origination costs of $5.0 million and $1.5 million, respectively, at September 30, 2021 and December 31, 2020 and net unamortized premiums on purchased loans of $489 thousand and $787 thousand, respectively, at September 30, 2021 and December 31, 2020. Loan balances exclude accrued interest receivable of $11.1 million and $11.3 million, respectively, as of September 30, 2021 and December 31, 2020. Accrued interest receivable is included in other assets in the Unaudited Consolidated Balance Sheets. As of September 30, 2021 and December 31, 2020, loans amounting to $2.2 billion and $2.1 billion, respectively, were pledged as collateral to the FHLB under a blanket pledge agreement and to the FRB. See Note 8 for additional disclosure regarding borrowings. Loan Modifications Under the CARES Act The Corporation elected to account for eligible loan modifications under Section 4013 of the Coronavirus Aid, Relief and Economic Security Act (the “CARES Act”), as amended by the Coronavirus Response and Relief Supplemental Appropriations Act. To be eligible, a loan modification must be (1) related to the COVID-19 pandemic; (2) executed on a loan that was not more than 30 days past due as of December 31, 2019; and (3) executed between March 1, 2020, and the earlier of (A) 60 days after the date of termination of the national emergency declared by the President on March 13, 2020 concerning the COVID-19 outbreak (the “national emergency”) or (B) January 1, 2022. Eligible loan modifications are not required to be classified as troubled debt restructurings (“TDRs”) and are not reported as past due provided that they are performing in accordance with the modified terms. Interest income will continue to be recognized unless the loan is placed on nonaccrual status in accordance with the nonaccrual loans accounting policy described below. Washington Trust has processed loan payment deferral modifications, or "deferments", on 654 loans totaling $728 million since the beginning of the second quarter of 2020, in response to the COVID-19 pandemic. The majority of these deferments qualified as eligible loan modifications under Section 4013 of the CARES Act, as amended. As of September 30, 2021, we had active deferments on five loans totaling $38.0 million, or 1% of total loans excluding Paycheck Protection Program (“PPP”) loans. Concentrations of Credit Risk A significant portion of our loan portfolio is concentrated among borrowers in southern New England and a substantial portion of the portfolio is collateralized by real estate in this area. The ability of single family residential and consumer borrowers to honor their repayment commitments is generally dependent on the level of overall economic activity within the market area and real estate values. The ability of commercial borrowers to honor their repayment commitments is dependent on the general economy, as well as the health of the real estate economic sector in the Corporation’s market area. Past Due Loans Past due status is based on the contractual payment terms of the loan. The following tables present an age analysis of loans, segregated by class of loans: (Dollars in thousands) Days Past Due September 30, 2021 30-59 60-89 Over 90 Total Past Due Current Total Loans Commercial: Commercial real estate $— $— $— $— $1,661,785 $1,661,785 Commercial & industrial 1 1 — 2 682,772 682,774 Total commercial 1 1 — 2 2,344,557 2,344,559 Residential Real Estate: Residential real estate 3,452 2,319 2,927 8,698 1,663,666 1,672,364 Consumer: Home equity 398 323 103 824 249,050 249,874 Other 19 5 — 24 19,583 19,607 Total consumer 417 328 103 848 268,633 269,481 Total loans $3,870 $2,648 $3,030 $9,548 $4,276,856 $4,286,404 (Dollars in thousands) Days Past Due December 31, 2020 30-59 60-89 Over 90 Total Past Due Current Total Loans Commercial: Commercial real estate $265 $— $— $265 $1,632,759 $1,633,024 Commercial & industrial 1 2 — 3 817,405 817,408 Total commercial 266 2 — 268 2,450,164 2,450,432 Residential Real Estate: Residential real estate 4,466 701 5,172 10,339 1,456,973 1,467,312 Consumer: Home equity 894 129 644 1,667 257,518 259,185 Other 23 7 88 118 18,943 19,061 Total consumer 917 136 732 1,785 276,461 278,246 Total loans $5,649 $839 $5,904 $12,392 $4,183,598 $4,195,990 Included in past due loans as of September 30, 2021 and December 31, 2020, were nonaccrual loans of $6.9 million and $8.5 million, respectively. All loans 90 days or more past due at September 30, 2021 and December 31, 2020 were classified as nonaccrual. 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 table presents the carrying value of nonaccrual loans: (Dollars in thousands) Sep 30, Dec 31, Commercial: Commercial real estate $— $— Commercial & industrial — — Total commercial — — Residential Real Estate: Residential real estate 10,321 11,981 Consumer: Home equity 655 1,128 Other — 88 Total consumer 655 1,216 Total nonaccrual loans $10,976 $13,197 Accruing loans 90 days or more past due $— $— Nonaccrual loans of $4.0 million and $4.7 million, respectively, at September 30, 2021 and December 31, 2020 were current as to the payment of principal and interest. No ACL was deemed necessary on nonaccrual loans with a carrying value of $4.0 million and $3.0 million, respectively, as of September 30, 2021 and December 31, 2020. As of September 30, 2021 and December 31, 2020, nonaccrual loans secured by one- to four-family residential property amounting to $1.5 million and $3.4 million, respectively, were in process of foreclosure. There were no significant commitments to lend additional funds to borrowers whose loans were on nonaccrual status at September 30, 2021. The following table presents interest income recognized on nonaccrual loans: (Dollars in thousands) Three Months Nine Months Periods ended September 30, 2021 2020 2021 2020 Commercial: Commercial real estate $— $— $— $— Commercial & industrial — — — — Total commercial — — — — Residential Real Estate: Residential real estate 131 70 288 341 Consumer: Home equity 9 11 44 51 Other — — — — Total consumer 9 11 44 51 Total $140 $81 $332 $392 Troubled Debt Restructurings A loan that has been modified or renewed is considered to be a TDR when two conditions are met: (1) the borrower is experiencing financial difficulty and (2) concessions are made for the borrower’s benefit that would not otherwise be considered for a borrower or a transaction with similar credit risk characteristics. 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. The Corporation's ACL reflects the effects of a TDR when management reasonably expects at the reporting date that a TDR will be executed with an individual borrower. A TDR is considered reasonably expected no later than the point when management concludes that modification is the best course of action and it is at least reasonably possible that the troubled borrower will accept some form of concession to avoid a default. Reasonably expected TDRs and executed TDRs are evaluated individually to determine the required ACL. TDRs that did not involve a below-market rate concession and perform in accordance with their modified contractual terms for a reasonable period of time may be included in the Corporation’s existing pools based on the underlying risk characteristics of the loan to measure the ACL. TDRs are classified as accruing or non-accruing based on management’s assessment of the collectability of the loan. Loans that 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 and full collection of principal and interest is in doubt. TDRs are reported as such for at least one year from the date of the restructuring. In years after the restructuring, TDRs are removed from this classification if the restructuring did not involve a below-market rate concession and the loan is performing in accordance with their modified contractual terms for a reasonable period of time. The recorded investment in TDRs consists of unpaid principal balance, net of charge-offs and unamortized deferred loan origination fees and costs. For accruing TDRs, the recorded investment also includes accrued interest. The following table presents the recorded investment in TDRs and other pertinent information: (Dollars in thousands) Sep 30, Dec 31, Accruing TDRs $8,047 $13,418 Nonaccrual TDRs 1,732 2,345 Total TDRs $9,779 $15,763 Specific reserves on TDRs included in the ACL on loans $195 $159 Additional commitments to lend to borrowers with TDRs $— $— The following tables present TDRs occurring during the period indicated and the recorded investment pre- and post- modification: (Dollars in thousands) Outstanding Recorded Investment # of Loans Pre-Modifications Post-Modifications Three months ended September 30, 2021 2020 2021 2020 2021 2020 Commercial: Commercial real estate — — $— $— $— $— Commercial & industrial — — — — — — Total commercial — — — — — — Residential Real Estate: Residential real estate — 4 — 2,092 — 2,092 Consumer: Home equity — 1 — 71 — 71 Other — — — — — — Total consumer — 1 $— $71 $— $71 Total — 5 $— $2,163 $— $2,163 (Dollars in thousands) Outstanding Recorded Investment # of Loans Pre-Modifications Post-Modifications Nine months ended September 30, 2021 2020 2021 2020 2021 2020 Commercial: Commercial real estate — 1 $— $841 $— $841 Commercial & industrial — 2 — 460 — 460 Total commercial — 3 — 1,301 — 1,301 Residential Real Estate: Residential real estate — 10 — 5,604 — 5,604 Consumer: Home equity — 4 — 873 — 873 Other — — — — — — Total consumer — 4 $— $873 $— $873 Total — 17 $— $7,778 $— $7,778 The following table presents TDRs occurring during the period indicated by type of modification: (Dollars in thousands) Three Months Nine Months Periods ended September 30, 2021 2020 2021 2020 Below-market interest rate concession $— $— $— $— Payment deferral — 2,163 — 7,365 Maturity / amortization concession — — — — Interest only payments — — — — Combination (1) — — — 413 Total $— $2,163 $— $7,778 (1) Loans included in this classification were modified with a combination of any two of the concessions listed in this table. The following tables present information on TDRs modified within the previous 12 months for which there was a payment default: (Dollars in thousands) # of Loans Recorded Investment Three months ended September 30, 2021 2020 2021 2020 TDRs with a Payment Default: Residential real estate 1 1 $330 $903 Home equity — 1 — 47 Totals 1 2 $330 $950 (Dollars in thousands) # of Loans Recorded Investment Nine months ended September 30, 2021 2020 2021 2020 TDRs with a Payment Default: Residential real estate 1 1 $330 $903 Home equity — 1 — 47 Totals 1 2 $330 $950 Individually Analyzed Loans Individually analyzed loans include nonaccrual commercial loans, reasonably expected TDRs and executed TDRs, as well as certain other loans based on the underlying risk characteristics and the discretion of management to individually analyze such loans. As of September 30, 2021, the carrying value of individually analyzed loans amounted to $15.5 million, of which $7.7 million were considered collateral dependent. As of December 31, 2020, the carrying value of individually analyzed loans amounted to $18.3 million, of which $8.4 million were considered collateral dependent. For collateral dependent loans where management has determined that foreclosure of the collateral is probable, or where the borrower is experiencing financial difficulty and repayment of the loan is to be provided substantially through the operation or sale of the collateral, the ACL is measured based on the difference between the fair value of the collateral and the amortized cost basis of the loan as of the measurement date. See Note 11 for additional disclosure regarding fair value of individually analyzed collateral dependent loans. The following table presents the carrying value of collateral dependent individually analyzed loans: (Dollars in thousands) September 30, 2021 December 31, 2020 Carrying Value Related Allowance Carrying Value Related Allowance Commercial: Commercial real estate (1) $4,009 $321 $1,792 $— Commercial & industrial (2) — — 451 — Total commercial 4,009 321 2,243 — Residential Real Estate: Residential real estate (3) 3,716 538 5,947 38 Consumer: Home equity (3) — — 254 183 Other — — — — Total consumer — — 254 183 Total $7,725 $859 $8,444 $221 (1) Secured by income-producing property. (2) Secured by business assets. (3) Secured by one- to four-family residential properties. 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 risk 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. The Corporation takes the risk rating into consideration along with other credit attributes in the establishment of an appropriate allowance for credit losses on loans. 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 may exhibit some weakness in various credit metrics such as collateral adequacy, cash flow, performance or may be in an industry or of a loan type known to have a higher degree of risk. These weaknesses may be mitigated by secondary sources of repayment, including Small Business Administration (“SBA”) guarantees. 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 risk ratings and classifications to be revised whenever information becomes available that indicates a change is warranted. On a quarterly basis, management reviews a watched asset list, which generally consists of commercial loans that are risk-rated 6 or worse, highly leveraged transaction loans, high-volatility commercial real estate, loans with active deferrals resulting from the COVID-19 pandemic, and other selected loans. Management’s review focuses on the current status of the loans, the appropriateness of risk ratings and strategies to improve the credit. An annual credit review program is conducted by a third party to provide an independent evaluation of the creditworthiness of the commercial loan portfolio, the quality of the underwriting and credit risk management practices and the appropriateness of the risk rating classifications. This review is supplemented with selected targeted internal reviews of the commercial loan portfolio. Residential and Consumer Management monitors the relatively homogeneous residential real estate and consumer loan portfolios on an ongoing basis using delinquency information by loan type. In addition, other techniques are utilized to monitor indicators of credit deterioration in the residential real estate loans and home equity consumer loans. Among these techniques is the periodic tracking of loans with an updated Fair Isaac Corporation (“FICO”) score and an updated estimated loan to value (“LTV”) ratio. LTV is estimated based on such factors as geographic location, the original appraised value and changes in median home prices, and takes into consideration the age of the loan. The results of these analyses and other credit review procedures, including selected targeted internal reviews, are taken into account in the determination of qualitative loss factors for residential real estate and home equity consumer credits. The following table summarizes the Corporation’s loan portfolio by credit quality indicator and loan portfolio segment as of September 30, 2021: (Dollars in thousands) Term Loans Amortized Cost by Origination Year 2021 2020 2019 2018 2017 Prior Revolving Loans Amortized Cost Revolving Loans Converted to Term Loans Total Commercial: CRE: Pass $260,038 $250,606 $305,492 $215,877 $179,618 $322,267 $8,466 $2,279 $1,544,643 Special Mention 6,002 786 29,670 37,010 16,091 23,209 364 — 113,132 Classified — 4,010 — — — — — — 4,010 Total CRE 266,040 255,402 335,162 252,887 195,709 345,476 8,830 2,279 1,661,785 C&I: Pass 120,412 96,441 106,652 90,595 52,440 99,439 87,001 1,096 654,076 Special Mention — — 642 4,641 6,419 13,019 1,186 — 25,907 Classified — — — — — 2,791 — — 2,791 Total C&I 120,412 96,441 107,294 95,236 58,859 115,249 88,187 1,096 682,774 Residential Real Estate: Residential real estate: Current 573,380 387,179 174,478 99,480 95,794 333,355 — — 1,663,666 Past Due — 1,407 272 1,299 763 4,957 — — 8,698 Total residential real estate 573,380 388,586 174,750 100,779 96,557 338,312 — — 1,672,364 Consumer: Home equity: Current 8,170 7,294 4,315 2,682 1,125 3,939 213,010 8,515 249,050 Past Due — — — — — 185 241 398 824 Total home equity 8,170 7,294 4,315 2,682 1,125 4,124 213,251 8,913 249,874 Other: Current 6,128 3,936 1,381 708 784 6,360 286 — 19,583 Past Due 14 10 — — — — — — 24 Total other 6,142 3,946 1,381 708 784 6,360 286 — 19,607 Total Loans $974,144 $751,669 $622,902 $452,292 $353,034 $809,521 $310,554 $12,288 $4,286,404 The following table summarizes the Corporation’s loan portfolio by credit quality indicator and loan portfolio segment as of December 31, 2020: (Dollars in thousands) Term Loans Amortized Cost by Origination Year 2020 2019 2018 2017 2016 Prior Revolving Loans Amortized Cost Revolving Loans Converted to Term Loans Total Commercial: CRE: Pass $283,341 $353,875 $260,917 $236,310 $136,490 $249,359 $10,333 $2,386 $1,533,011 Special Mention 756 20,235 39,387 16,222 11,318 10,367 771 — 99,056 Classified 957 — — — — — — — 957 Total CRE 285,054 374,110 300,304 252,532 147,808 259,726 11,104 2,386 1,633,024 C&I: Pass 293,493 95,775 98,146 56,792 44,445 91,128 95,817 1,296 776,892 Special Mention 1,123 722 3,210 6,839 3,141 14,853 3,806 56 33,750 Classified 403 — — — — 6,363 — — 6,766 Total C&I 295,019 96,497 101,356 63,631 47,586 112,344 99,623 1,352 817,408 Residential Real Estate: Residential real estate: Current 463,477 253,228 146,839 155,976 128,139 309,314 — — 1,456,973 Past Due 238 1,698 1,310 886 110 6,097 — — 10,339 Total residential real estate 463,715 254,926 148,149 156,862 128,249 315,411 — — 1,467,312 Consumer: Home equity: Current 9,838 6,771 3,898 1,474 1,217 3,955 219,085 11,280 257,518 Past Due — 35 24 — — 186 310 1,112 1,667 Total home equity 9,838 6,806 3,922 1,474 1,217 4,141 219,395 12,392 259,185 Other: Current 5,214 2,241 1,237 1,544 548 7,850 308 1 18,943 Past Due 19 1 — — 88 7 3 — 118 Total other 5,233 2,242 1,237 1,544 636 7,857 311 1 19,061 Total Loans $1,058,859 $734,581 $554,968 $476,043 $325,496 $699,479 $330,433 $16,131 $4,195,990 Consistent with industry practice, Washington Trust may renew commercial loans at or immediately prior to their maturity. In the tables above, renewals subject to full credit evaluation before being granted are reported as originations in the period renewed.

Allowance for Credit Losses on

Allowance for Credit Losses on Loans	9 Months Ended
	Sep. 30, 2021
Receivables [Abstract]
Allowance for Credit Losses on Loans	Allowance for Credit Losses on Loans The ACL on loans is management’s current estimate of expected credit losses over the expected life of the loans. The level of the ACL on loans is based on management’s ongoing review of all relevant information, from internal and external sources, relating to past events, current conditions and reasonable and supportable forecasts. Historical credit loss experience provides the basis for the calculation of loss given default and the estimation of expected credit losses. Qualitative adjustments are made for differences in specific risk characteristics, such as differences in underwriting standards, portfolio mix, delinquency level, or term, as well as for changes in environmental conditions, that may not be reflected in historical loss rates. In accordance with the ACL policy, the methodology is reviewed no less than annually. In the first quarter of 2021, management updated its ACL methodology for pooled loans to incorporate additional econometric factors in the determination of the probability of default for each loan portfolio segment. Econometric factors are selected based on the correlation of the factor to credit losses for each loan portfolio segment. Effective January 1, 2021, the following econometric factors are utilized in the determination of the probability of default for each loan portfolio segment: the national unemployment rate (“NUR”) and gross domestic product (“GDP”) econometric factors are utilized for the commercial real estate and other consumer loan portfolio segments; the NUR and national home price index (“HPI”) econometric factors are utilized for the residential real estate and home equity portfolio segments; and the NUR econometric factor is utilized for the commercial & industrial loan portfolio segment. Prior to January 1, 2021, solely the NUR was used in the determination of the probability of default for each loan portfolio segment. The following table presents the activity in the ACL on loans for the three months ended September 30, 2021: (Dollars in thousands) Commercial Consumer CRE C&I Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $21,450 $11,717 $33,167 $6,877 $1,340 $495 $1,835 $41,879 Charge-offs — 2 2 (57) (183) (11) (194) (249) Recoveries — — — 5 73 3 76 81 Provision (613) (392) (1,005) 1,131 (112) (14) (126) — Ending Balance $20,837 $11,327 $32,164 $7,956 $1,118 $473 $1,591 $41,711 The following table presents the activity in the ACL on loans for the nine months ended September 30, 2021: (Dollars in thousands) Commercial Consumer CRE C&I Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $22,065 $12,228 $34,293 $8,042 $1,300 $471 $1,771 $44,106 Charge-offs — (304) (304) (107) (183) (36) (219) (630) Recoveries — 3 3 85 79 19 98 186 Provision (1,228) (600) (1,828) (64) (78) 19 (59) (1,951) Ending Balance $20,837 $11,327 $32,164 $7,956 $1,118 $473 $1,591 $41,711 The following table presents the activity in the allowance for loan losses for the three months ended September 30, 2020: (Dollars in thousands) Commercial Consumer CRE C&I Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $20,283 $11,278 $31,561 $8,053 $1,394 $433 $1,827 $41,441 Charge-offs — (2) (2) (99) — (10) (10) (111) Recoveries — 2 2 — 4 9 13 15 Provision 1,474 (93) 1,381 (35) (51) 5 (46) 1,300 Ending Balance $21,757 $11,185 $32,942 $7,919 $1,347 $437 $1,784 $42,645 The following table presents the activity in the allowance for loan losses for the nine months ended September 30, 2020: (Dollars in thousands) Commercial Consumer CRE C&I Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $14,741 $3,921 $18,662 $6,615 $1,390 $347 $1,737 $27,014 Adoption of ASC 326 3,405 3,029 6,434 221 (106) (48) (154) 6,501 Charge-offs (172) (585) (757) (99) (174) (42) (216) (1,072) Recoveries — 11 11 — 11 23 34 45 Provision 3,783 4,809 8,592 1,182 226 157 383 10,157 Ending Balance $21,757 $11,185 $32,942 $7,919 $1,347 $437 $1,784 $42,645

Leases

Leases	9 Months Ended
	Sep. 30, 2021
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. Operating lease right-of-use (“ROU”) assets amounted to $27.5 million and $29.5 million, respectively, as of September 30, 2021 and December 31, 2020. Operating lease liabilities totaled $29.8 million and $31.7 million, respectively, as of September 30, 2021 and December 31, 2020. As of September 30, 2021, there were three operating leases that had not yet commenced. As of December 31, 2020, there were no operating leases that had not yet commenced. Rental expense for operating leases is recognized on a straight-line bas is over the lease term and amounted to $1.0 million and $3.1 million respectively, for the three and nine months ended September 30, 2021, compared to $1.0 million and $3.0 million, respectively, for the same periods in 2020. V ariable 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 information regarding the Corporation’s operating leases: Sep 30, 2021 Dec 31, 2020 Weighted average discount rate 3.35 % 3.34 % Range of lease expiration dates 10 months - 19 years 7 months - 20 years Range of lease renewal options 1 year - 5 years 1 year - 5 years Weighted average remaining lease term 13.0 years 13.4 years The following table presents the undiscounted annual lease payments under the terms of the Corporation’s operating leases at September 30, 2021, including a reconciliation to the present value of operating lease liabilities recognized in the Unaudited Consolidated Balance Sheets: (Dollars in thousands) October 1, 2021 to December 31, 2021 $978 2022 3,981 2023 3,881 2024 3,670 2025 2,932 2026 and thereafter 22,099 Total operating lease payments (1) 37,541 Less: interest 7,731 Present value of operating lease liabilities (2) $29,810 (1) Includes $1.4 million related to options to extend lease terms that are reasonably certain of being exercised. (2) Includes short-term operating lease liabilities of $3.1 million. The following table presents the components of total lease expense and operating cash flows: (Dollars in thousands) Three Months Nine Months Periods ended September 30, 2021 2020 2021 2020 Lease Expense: Operating lease expense $1,004 $1,005 $3,011 $2,915 Variable lease expense 10 14 44 41 Total lease expense (1) $1,014 $1,019 $3,055 $2,956 Cash Paid: Cash paid reducing operating lease liabilities $932 $956 $2,910 $2,831 (1) Included in net occupancy expenses in the Unaudited Consolidated Income Statement.

Federal Home Loan Bank Advances

Federal Home Loan Bank Advances	9 Months Ended
	Sep. 30, 2021
Debt Disclosure [Abstract]
Federal Home Loan Bank Advances	Federal Home Loan Bank Advances Advances payable to the FHLB amounted to $222.6 million and $593.9 million, respectively, at September 30, 2021 and December 31, 2020. As of September 30, 2021 and December 31, 2020, the Bank had access to a $40.0 million unused line of credit and also had remaining available borrowing capacity of $1.5 billion and $969.7 million, respectively, with the FHLB. The Bank pledges certain qualified investment securities and loans as collateral to the FHLB. The following table presents maturities and weighted average interest rates on FHLB advances outstanding as of September 30, 2021: (Dollars in thousands) Scheduled Weighted October 1, 2021 to December 31, 2021 $142,450 0.39 % 2022 — — 2023 35,000 0.45 2024 35,000 2.45 2025 — — 2026 and thereafter 10,142 3.06 Balance at September 30, 2021 $222,592 0.84 %

Shareholders' Equity

Shareholders' Equity	9 Months Ended
	Sep. 30, 2021
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]
Shareholders' Equity	Shareholders' Equity Stock Repurchase Program The Corporation’s Stock Repurchase Program adopted on December 1, 2020 (the “2020 Repurchase Program”) authorizes the repurchase of up to 850,000 shares, or approximately 5%, of the Corporation’s outstanding common stock. This authority may be exercised from time to time and in such amounts as market conditions warrant, and subject to regulatory considerations. The timing and actual number of shares repurchased depend on a variety of factors including price, corporate and regulatory requirements, market conditions, and other corporate liquidity requirements and priorities. The 2020 Repurchase Program expired on October 31, 2021 and no shares were repurchased under this program. Regulatory Capital Requirements Capital levels at September 30, 2021 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 September 30, 2021 Total Capital (to Risk-Weighted Assets): Corporation $569,424 13.83 % $329,407 8.00 % N/A N/A Bank 559,605 13.59 329,378 8.00 $411,723 10.00 % Tier 1 Capital (to Risk-Weighted Assets): Corporation 535,552 13.01 247,055 6.00 N/A N/A Bank 525,733 12.77 247,034 6.00 329,378 8.00 Common Equity Tier 1 Capital (to Risk-Weighted Assets): Corporation 513,553 12.47 185,291 4.50 N/A N/A Bank 525,733 12.77 185,275 4.50 267,620 6.50 Tier 1 Capital (to Average Assets): (1) Corporation 535,552 9.12 234,803 4.00 N/A N/A Bank 525,733 8.96 234,722 4.00 293,403 5.00 December 31, 2020 Total Capital (to Risk-Weighted Assets): Corporation 539,496 13.51 319,532 8.00 N/A N/A Bank 534,288 13.38 319,503 8.00 399,379 10.00 Tier 1 Capital (to Risk-Weighted Assets): Corporation 503,791 12.61 239,649 6.00 N/A N/A Bank 498,583 12.48 239,627 6.00 319,503 8.00 Common Equity Tier 1 Capital (to Risk-Weighted Assets): Corporation 481,792 12.06 179,737 4.50 N/A N/A Bank 498,583 12.48 179,721 4.50 259,596 6.50 Tier 1 Capital (to Average Assets): (1) Corporation 503,791 8.95 225,209 4.00 N/A N/A Bank 498,583 8.86 225,126 4.00 281,407 5.00 (1) Leverage ratio. In addition to the minimum regulatory capital required for capital adequacy purposes outlined in the table above, the Corporation is required to maintain a minimum capital conservation buffer, in the form of common equity, of 2.50% in order to avoid restrictions on capital distributions and discretionary bonuses. The Corporation’s capital levels exceeded the minimum regulatory capital requirements plus the capital conservation buffer at September 30, 2021 and December 31, 2020. 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 September 30, 2021 and December 31, 2020, $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 FRB’s capital adequacy guidelines. In accordance with regulatory capital rules, the Corporation elected the option to delay the estimated impact of Accounting Standards Codification (“ASC”) 326 on its regulatory capital over a two-year deferral and subsequent three-year transition period ending December 31, 2024. As a result, capital ratios and amounts as of September 30, 2021 and December 31, 2020 exclude the impact of the increased ACL on loans and unfunded loan commitments attributed to the adoption of ASC 326, which was effective January 1, 2020, adjusted for an approximation of the after-tax provision for credit losses attributable to

Derivative Financial Instrument

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2021
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 September 30, 2021 and December 31, 2020, the Corporation had 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 on borrowings mature in December of 2021 and December of 2023. As of September 30, 2021, the Corporation had an interest rate swap contract with a total notional amount of $300.0 million that was designated as a cash flow hedge to hedge the interest rate risk associated with a pool of variable rate commercial loans. The interest rate swap on loans was executed in the second quarter of 2021 and matures in May of 2026. 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 enters 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 the Corporation enters into an interest rate swap contract with a commercial loan borrower, it simultaneously enters 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. The Corporation retains the risk that is associated with the potential failure of counterparties and the risk inherent in originating loans. As of September 30, 2021 and December 31, 2020, Washington Trust had interest rate swap contracts with commercial loan borrowers with notional amounts of $998.5 million and $991.0 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 September 30, 2021, the notional amounts of risk participation-out agreements and risk participation-in agreements were $74.6 million and $147.4 million, respectively, compared to $61.6 million and $92.7 million, respectively, as of December 31, 2020. Mortgage 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 September 30, 2021, the notional amounts of interest rate lock commitments and forward sale commitments were $97.9 million and $195.1 million, respectively, compared to $167.7 million and $279.7 million, respectively, as of December 31, 2020. The following table presents the fair values of derivative instruments in the Unaudited Consolidated Balance Sheets: (Dollars in thousands) Derivative Assets Derivative Liabilities Fair Value Fair Value Balance Sheet Location Sep 30, 2021 Dec 31, 2020 Balance Sheet Location Sep 30, 2021 Dec 31, 2020 Derivatives Designated as Cash Flow Hedging Instruments: Interest rate risk management contracts: Interest rate swaps Other assets $180 $— Other liabilities $2,006 $1,958 Derivatives not Designated as Hedging Instruments: Loan related derivative contracts: Interest rate swaps with customers Other assets 42,873 75,804 Other liabilities 1,667 68 Mirror swaps with counterparties Other assets 1,649 67 Other liabilities 42,996 76,248 Risk participation agreements Other assets 1 22 Other liabilities 2 2 Mortgage loan commitments: Interest rate lock commitments Other assets 2,344 7,202 Other liabilities — — Forward sale commitments Other assets 703 — Other liabilities 1,024 2,914 Gross amounts 47,750 83,095 47,695 81,190 Less: amounts offset (1) 1,828 67 1,828 67 Derivative balances, net of offset 45,922 83,028 45,867 81,123 Less: collateral pledged (2) — — 39,109 74,698 Net amounts $45,922 $83,028 $6,758 $6,425 (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 table presents the effect of derivative instruments in the Unaudited Consolidated Statements of Changes in Shareholders’ Equity: (Dollars in thousands) Gain (Loss) Recognized in Three Months Nine Months Periods ended September 30, 2021 2020 2021 2020 Derivatives Designated as Cash Flow Hedging Instruments: Interest rate risk management contracts: Interest rate swaps ($403) $214 ($36) ($1,109) Interest rate caps — 25 — 71 Interest rate floors — (85) — 150 Total ($403) $154 ($36) ($888) Interest rate cap and interest rate floor contracts designated as cash flow hedges matured in 2020. For derivatives designated as cash flow hedging instruments, see Note 16 for additional disclosure pertaining to the amounts and location of reclassifications from accumulated other comprehensive income into earnings. The following table presents the effect of derivative instruments in the Corporation’s Unaudited Consolidated Statements of Income: (Dollars in thousands) Amount of Gain (Loss) Three Months Nine Months Periods ended September 30, Statement of Income Location 2021 2020 2021 2020 Derivatives not Designated as Hedging Instruments: Loan related derivative contracts: Interest rate swaps with customers Loan related derivative income ($2,715) $767 ($21,281) $67,258 Mirror swaps with counterparties Loan related derivative income 3,558 499 23,173 (63,655) Risk participation agreements Loan related derivative income (115) (2) 478 215 Mortgage loan commitments: Interest rate lock commitments Mortgage banking revenues (17) (1,499) (4,859) 5,785 Forward sale commitments Mortgage banking revenues (361) (4,743) 4,994 (10,733) Total $350 ($4,978) $2,505 ($1,130)

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2021
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 individually analyzed 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) September 30, December 31, Aggregate fair value $48,705 $61,614 Aggregate principal balance 47,464 59,313 Difference between fair value and principal balance $1,241 $2,301 Changes in fair value of mortgage loans held for sale accounted for under the fair value option election are included in mortgage banking revenues in the Unaudited Consolidated Statements of Income. Changes in fair value amounted to an increase to mortgage banking revenues of $372 thousand for the three months ended September 30, 2021 and a decrease to mortgage banking revenues of $1.1 million for the nine months ended September 30, 2021. This compared to increases to mortgage banking revenues of $1.1 million and $2.2 million, respectively, in the three and nine months ended September 30, 2020. There were no mortgage loans held for sale 90 days or more past due as of September 30, 2021 and December 31, 2020. 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 September 30, 2021 and December 31, 2020. 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, 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 September 30, 2021 and December 31, 2020. 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 Individually Analyzed Loans The fair value of collateral dependent individually analyzed loans is determined based upon the appraised 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 that are expected to be repaid substantially through the sale of the collateral, management adjusts the fair value for estimated costs to sell. 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 collateral. Internal valuations may be utilized to determine the fair value of other business assets. Collateral dependent individually analyzed loans are categorized as Level 3. Loan Servicing Rights Loans sold with the retention of servicing result in the recognition of loan servicing rights. Loan servicing rights are included in other assets in the Unaudited Consolidated Balance Sheets and are amortized as an offset to mortgage banking revenues over the estimated period of servicing. Loan servicing rights are evaluated quarterly for impairment based on their fair value. Impairment exists if the carrying value exceeds the estimated fair value. Impairment is measured on an aggregated basis by stratifying the loan servicing rights based on homogeneous characteristics such as note rate and loan type. The fair value is estimated using an independent valuation model that estimates the present value of expected cash flows, incorporating assumptions for discount rates and prepayment rates. Any impairment is recognized through a valuation allowance and as a reduction to mortgage banking revenues. Loan servicing rights are categorized as Level 3. Derivatives Interest rate swaps, caps and floors are traded in over-the-counter markets where quoted market prices are not readily available. Fair value measurements are determined using independent valuation software, which utilizes the present value of future cash flows discounted using market observable inputs such as forward rate assumptions. The Corporation 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. The Corporation has determined that the majority of the inputs used to value its derivative positions fall within Level 2 of the fair value hierarchy. However, the credit valuation adjustments utilize Level 3 inputs. As of September 30, 2021 and December 31, 2020, 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. 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 Significant Other Observable Inputs Significant Unobservable Inputs September 30, 2021 Assets: Available for sale debt securities: Obligations of U.S. government-sponsored enterprises $178,605 $— $178,605 $— Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 843,702 — 843,702 — Individual name issuer trust preferred debt securities 11,156 — 11,156 — Corporate bonds 12,370 — 12,370 — Mortgage loans held for sale 48,705 — 48,705 — Derivative assets 45,922 — 45,922 — Total assets at fair value on a recurring basis $1,140,460 $— $1,140,460 $— Liabilities: Derivative liabilities $45,867 $— $45,867 $— Total liabilities at fair value on a recurring basis $45,867 $— $45,867 $— (Dollars in thousands) Total Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs December 31, 2020 Assets: Available for sale debt securities: Obligations of U.S. government-sponsored enterprises $131,669 $— $131,669 $— Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 740,305 — 740,305 — Individual name issuer trust preferred debt securities 12,669 — 12,669 — Corporate bonds 9,928 — 9,928 — Mortgage loans held for sale 61,614 — 61,614 — Derivative assets 83,028 — 83,028 — Total assets at fair value on a recurring basis $1,039,213 $— $1,039,213 $— Liabilities: Derivative liabilities $81,123 $— $81,123 $— Total liabilities at fair value on a recurring basis $81,123 $— $81,123 $— Items Recorded at Fair Value on a Nonrecurring Basis The following table presents the carrying value of assets held at September 30, 2021, which were written down to fair value during the nine months ended September 30, 2021: (Dollars in thousands) Total Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Assets: Collateral dependent individually analyzed loans $3,563 $— $— $3,563 Total assets at fair value on a nonrecurring basis $3,563 $— $— $3,563 The following table presents the carrying value of assets held at December 31, 2020, which were written down to fair value during the year ended December 31, 2020: (Dollars in thousands) Total Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Assets: Collateral dependent individually analyzed loans $1,720 $— $— $1,720 Loan servicing rights 7,434 — — 7,434 Total assets at fair value on a nonrecurring basis $9,154 $— $— $9,154 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 September 30, 2021 Collateral dependent individually analyzed loans $3,563 Appraisals of collateral Discount for costs to sell 0% - 14% (11%) Appraisal adjustments 0% - 100% (15%) (Dollars in thousands) Fair Value Valuation Technique Unobservable Input Range of Inputs Utilized December 31, 2020 Collateral dependent individually analyzed loans $1,720 Appraisals of collateral Discount for costs to sell 0% - 25% (11%) Appraisal adjustments 0% - 100% (15%) Loan servicing rights 7,434 Discounted cash flow Discount rates 10% - 14% (10%) Prepayment rates 18% - 42% (21%) 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) September 30, 2021 Carrying Amount Total Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Financial Assets: Loans, net of allowance for credit losses on loans $4,244,693 $4,174,632 $— $— $4,174,632 Financial Liabilities: Time deposits $1,464,284 $1,468,196 $— $1,468,196 $— FHLB advances 222,592 225,069 — 225,069 — Junior subordinated debentures 22,681 20,136 — 20,136 — (Dollars in thousands) December 31, 2020 Carrying Amount Total Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Financial Assets: Loans, net of allowance for credit losses on loans $4,151,884 $4,114,628 $— $— $4,114,628 Financial Liabilities: Time deposits $1,296,396 $1,302,128 $— $1,302,128 $— FHLB advances 593,859 602,000 — 602,000 — Junior subordinated debentures 22,681 19,422 — 19,422 —

Revenue from Contracts with Cus

Revenue from Contracts with Customers	9 Months Ended
	Sep. 30, 2021
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 that are from contracts with customers within the scope of ASC 606. As shown below, a substantial portion of our revenues are specifically excluded from the scope of ASC 606. For the three months ended September 30, 2021 2020 (Dollars in thousands) Revenue (1) ASC 606 Revenue (2) Revenue (1) ASC 606 Revenue (2) Net interest income $36,070 $— $31,654 $— Noninterest income: Asset-based wealth management revenues 10,224 10,224 8,786 8,786 Transaction-based wealth management revenues 231 231 168 168 Total wealth management revenues 10,455 10,455 8,954 8,954 Mortgage banking revenues 6,373 — 12,353 — Card interchange fees 1,265 1,265 1,161 1,161 Service charges on deposit accounts 673 673 598 598 Loan related derivative income 728 — 1,264 — Income from bank-owned life insurance 618 — 567 — Other income 408 310 571 491 Total noninterest income 20,520 12,703 25,468 11,204 Total revenues $56,590 $12,703 $57,122 $11,204 (1) As reported in the Consolidated Statements of Income. (2) Revenue from contracts with customers in scope of ASC 606. For the nine months ended September 30, 2021 2020 (Dollars in thousands) Revenue (1) ASC 606 Revenue (2) Revenue (1) ASC 606 Revenue (2) Net interest income $103,695 $— $95,201 $— Noninterest income: Asset-based wealth management revenues 29,798 29,798 25,297 25,297 Transaction-based wealth management revenues 980 980 951 951 Total wealth management revenues 30,778 30,778 26,248 26,248 Mortgage banking revenues 24,294 — 33,300 — Card interchange fees 3,714 3,714 3,139 3,139 Service charges on deposit accounts 1,917 1,917 1,975 1,975 Loan related derivative income 2,370 — 3,818 — Income from bank-owned life insurance 1,781 — 1,922 — Other income 2,233 1,834 1,313 1,026 Total noninterest income 67,087 38,243 71,715 32,388 Total revenues $170,782 $38,243 $166,916 $32,388 (1) As reported in the Consolidated Statements of Income. (2) Revenue from contracts with customers in scope of ASC 606. The Corporation recognizes revenue that is transactional in nature and such revenue is earned at a point in time. Revenue that is recognized at a point in time includes card interchange fees (fee income related to debit card transactions), automated teller machine (“ATM”) fees, wire transfer fees, overdraft charge fees, and stop-payment and returned check fees. Such revenue is derived from transactional information and is recognized as revenue immediately as the transactions occur or upon providing the service to complete the customer’s transaction. The Corporation recognizes revenue over a period of time, generally monthly, as services are performed and performance obligations are satisfied. Such revenue includes wealth management revenues and service charges on deposit accounts. Wealth management revenues are categorized as either asset-based revenues or transaction-based revenues. Asset-based revenues include trust and investment management fees that are earned based upon a percentage of asset values under administration. Transaction-based revenues include tax preparation fees, commissions and other service fees. Fee revenue from service charges on deposit accounts represent service charges assessed to customers who hold deposit accounts at the Bank. The following table presents revenue from contracts with customers based on the timing of revenue recognition: (Dollars in thousands) Three Months Nine Months Periods ended September 30, 2021 2020 2021 2020 Revenue recognized at a point in time: Card interchange fees $1,265 $1,161 $3,714 $3,139 Service charges on deposit accounts 531 447 1,516 1,488 Other income 247 441 1,678 895 Revenue recognized over time: Wealth management revenues 10,455 8,954 30,778 26,248 Service charges on deposit accounts 142 151 401 487 Other income 63 50 156 131 Total revenues from contracts in scope of Topic 606 $12,703 $11,204 $38,243 $32,388 Receivables for revenue from contracts with customers primarily consist of amounts due for wealth management services performed for which the Corporation’s performance obligations have been fully satisfied. Receivables amounted to $4.8 million at both September 30, 2021 and December 31, 2020 and were included in other assets in the Unaudited Consolidated Balance Sheets. Deferred revenues, which are considered contract liabilities under ASC 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 September 30, 2021 and December 31, 2020 and were included in other liabilities in the Unaudited Consolidated Balance Sheets. For commissions and incentives that are in scope of ASC 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 $1.6 million at September 30, 2021, compared to $1.5 million at December 31, 2020 and were included in other assets in the Unaudited Consolidated Balance Sheets. The amortization of contract cost assets is recorded within salaries and employee benefits expense in the Unaudited Consolidated Statements of Income.

Defined Benefit Pension Plans

Defined Benefit Pension Plans	9 Months Ended
	Sep. 30, 2021
Retirement Benefits [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 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 Non-Qualified Retirement Plans Three Months Nine Months Three Months Nine Months Periods ended September 30, 2021 2020 2021 2020 2021 2020 2021 2020 Net Periodic Benefit Cost: Service cost (1) $592 $541 $1,777 $1,623 $52 $43 $156 $128 Interest cost (2) 500 626 1,502 1,879 84 116 253 349 Expected return on plan assets (2) (1,203) (1,135) (3,611) (3,404) — — — — Recognized net actuarial loss (2) 531 396 1,591 1,187 180 139 542 419 Net periodic benefit cost $420 $428 $1,259 $1,285 $316 $298 $951 $896 (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 nine months ended September 30, 2021 2020 2021 2020 Measurement date Dec 31, 2020 Dec 31, 2019 Dec 31, 2020 Dec 31, 2019 Equivalent single discount rate for benefit obligations 2.71% 3.42% 2.51% 3.30% Equivalent single discount rate for service cost 2.86 3.54 2.94 3.62 Equivalent single discount rate for interest cost 2.16 3.07 1.97 2.93 Expected long-term return on plan assets 5.75 5.75 N/A N/A Rate of compensation increase 3.75 3.75 3.75 3.75

Share-Based Compensation Arrang

Share-Based Compensation Arrangements	9 Months Ended
	Sep. 30, 2021
Share-based Payment Arrangement [Abstract]
Share-Based Compensation Arrangements	Share-Based Compensation Arrangements During the nine months ended September 30, 2021, the Corporation granted performance share unit awards and nonvested share unit awards. Performance share unit awards were granted to certain key employees providing the opportunity to earn shares of common stock over a 3-year performance period. The weighted average fair value of the performance share unit awards was $46.15. 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. Based on the most recent performance assumption available, it is estimated that 51,156 shares will be earned. In addition, the Corporation granted to certain key employees and non-executive directors 8,360 nonvested share units with 3-year cliff vesting. The weighted average grant date fair value of the nonvested share units was $50.81.

Business Segments

Business Segments	9 Months Ended
	Sep. 30, 2021
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 Corporate unit includes activity not allocated to the operating segments. Management uses certain methodologies to allocate income and expenses to the business lines. The methodologies are periodically reviewed and revised. Results may be restated, when necessary, to reflect changes in organizational structure or allocation methodology. 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 indirect expenses such as technology, operations and other support functions. Commercial Banking The Commercial Banking operating 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 banking, internet banking and mobile banking services and customer support and sales. Wealth Management Services The Wealth Management Services operating segment includes investment management; holistic financial planning services; personal trust and estate services, including services as trustee, personal representative, custodian and guardian; settlement of decedents’ estates; and institutional trust services, including custody and 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 September 30, 2021 2020 2021 2020 2021 2020 2021 2020 Net interest income (expense) $35,732 $33,103 ($25) ($24) $363 ($1,425) $36,070 $31,654 Provision for credit losses — 1,325 — — — — — 1,325 Net interest income (expense) after provision for credit losses 35,732 31,778 (25) (24) 363 (1,425) 36,070 30,329 Noninterest income 9,440 15,940 10,455 8,954 625 574 20,520 25,468 Noninterest expenses: Depreciation and amortization expense 718 601 341 350 46 38 1,105 989 Other noninterest expenses 20,108 20,273 7,190 7,178 4,117 3,904 31,415 31,355 Total noninterest expenses 20,826 20,874 7,531 7,528 4,163 3,942 32,520 32,344 Income (loss) before income taxes 24,346 26,844 2,899 1,402 (3,175) (4,793) 24,070 23,453 Income tax expense (benefit) 5,394 5,828 710 403 (785) (1,100) 5,319 5,131 Net income (loss) $18,952 $21,016 $2,189 $999 ($2,390) ($3,693) $18,751 $18,322 Total assets at period end $4,520,169 $4,588,419 $75,438 $74,942 $1,407,036 $1,186,431 $6,002,643 $5,849,792 Expenditures for long-lived assets 309 360 13 20 16 26 338 406 (Dollars in thousands) Commercial Banking Wealth Management Services Corporate Consolidated Total Nine months ended September 30, 2021 2020 2021 2020 2021 2020 2021 2020 Net interest income (expense) $105,579 $94,692 ($72) ($117) ($1,812) $626 $103,695 $95,201 Provision for credit losses (2,000) 10,561 — — — — (2,000) 10,561 Net interest income (expense) after provision for loan losses 107,579 84,131 (72) (117) (1,812) 626 105,695 84,640 Noninterest income 33,510 43,515 31,778 26,248 1,799 1,952 67,087 71,715 Noninterest expenses: Depreciation and amortization expense 2,040 1,832 1,044 1,058 139 116 3,223 3,006 Other noninterest expenses 60,093 56,571 20,594 20,408 16,335 11,290 97,022 88,269 Total noninterest expenses 62,133 58,403 21,638 21,466 16,474 11,406 100,245 91,275 Income (loss) before income taxes 78,956 69,243 10,068 4,665 (16,487) (8,828) 72,537 65,080 Income tax expense (benefit) 17,275 14,769 2,412 1,216 (3,832) (2,168) 15,855 13,817 Net income (loss) $61,681 $54,474 $7,656 $3,449 ($12,655) ($6,660) $56,682 $51,263 Total assets at period end $4,520,169 $4,588,419 $75,438 $74,942 $1,407,036 $1,186,431 $6,002,643 $5,849,792 Expenditures for long-lived assets 2,026 1,147 87 86 53 98 2,166 1,331

Other Comprehensive Income (Los

Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Other Comprehensive Income (Loss)	Other Comprehensive Income (Loss) The following tables present the activity in other comprehensive income (loss): Three months ended September 30, 2021 2020 (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 ($4,127) ($990) ($3,137) ($4,582) ($1,077) ($3,505) Cash flow hedges: Change in fair value of cash flow hedges (288) (69) (219) (146) (39) (107) Net cash flow hedge (losses) gains reclassified into earnings (1) (2) (243) (59) (184) 344 83 261 Net change in fair value of cash flow hedges (531) (128) (403) 198 44 154 Defined benefit plan obligations: Amortization of net actuarial losses (3) 711 171 540 535 125 410 Total other comprehensive loss ($3,947) ($947) ($3,000) ($3,849) ($908) ($2,941) (1) The pre-tax amounts for the three months ended September 30, 2021 are included in interest expense on FHLB advances and interest and fees on loans in the Unaudited Consolidated Statements of Income. (2) The pre-tax amounts for the three months ended September 30, 2020 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. Nine months ended September 30, 2021 2020 (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 ($16,212) ($3,890) ($12,322) $9,794 $2,301 $7,493 Cash flow hedges: Change in fair value of cash flow hedges (21) (5) (16) (1,994) (473) (1,521) Net cash flow hedge (losses) gains reclassified into earnings (1) (2) (27) (7) (20) 829 196 633 Net change in fair value of cash flow hedges (48) (12) (36) (1,165) (277) (888) Defined benefit plan obligations: Amortization of net actuarial losses (3) 2,133 512 1,621 1,606 377 1,229 Total other comprehensive (loss) income ($14,127) ($3,390) ($10,737) $10,235 $2,401 $7,834 (1) The pre-tax amounts for the nine months ended September 30, 2021 are included in interest expense on FHLB advances and interest and fees on loans in the Unaudited Consolidated Statements of Income. (2) The pre-tax amounts for the nine months ended September 30, 2020 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 Gains (Losses) on Available For Sale Debt Securities Net Unrealized Losses on Cash Flow Hedges Defined Benefit Pension Plan Adjustment Total For the three months ended September 30, 2021 Balance at June 30, 2021 $696 ($1,080) ($14,744) ($15,128) Other comprehensive loss before reclassifications (3,137) (219) — (3,356) Amounts reclassified from accumulated other comprehensive income — (184) 540 356 Net other comprehensive (loss) income (3,137) (403) 540 (3,000) Balance at September 30, 2021 ($2,441) ($1,483) ($14,204) ($18,128) (Dollars in thousands) Net Unrealized Gains (Losses) on Available For Sale Debt Securities Net Unrealized Losses on Cash Flow Hedges Defined Benefit Pension Plan Adjustment Total For the nine months ended September 30, 2021 Balance at December 31, 2020 $9,881 ($1,447) ($15,825) ($7,391) Other comprehensive loss before reclassifications (12,322) (16) — (12,338) Amounts reclassified from accumulated other comprehensive income — (20) 1,621 1,601 Net other comprehensive (loss) income (12,322) (36) 1,621 (10,737) Balance at September 30, 2021 ($2,441) ($1,483) ($14,204) ($18,128) (Dollars in thousands) Net Unrealized Gains (Losses) 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 September 30, 2020 Balance at June 30, 2020 $14,224 ($1,835) ($12,851) ($462) Other comprehensive loss before reclassifications (3,505) (107) — (3,612) Amounts reclassified from accumulated other comprehensive income — 261 410 671 Net other comprehensive (loss) income (3,505) 154 410 (2,941) Balance at September 30, 2020 $10,719 ($1,681) ($12,441) ($3,403) (Dollars in thousands) Net Unrealized Gains on Available For Sale Debt Securities Net Unrealized (Losses) Gains on Cash Flow Hedges Defined Benefit Pension Plan Adjustment Total For the nine months ended September 30, 2020 Balance at December 31, 2019 $3,226 ($793) ($13,670) ($11,237) Other comprehensive income (loss) before reclassifications 7,493 (1,521) — 5,972 Amounts reclassified from accumulated other comprehensive income — 633 1,229 1,862 Net other comprehensive income (loss) 7,493 (888) 1,229 7,834 Balance at September 30, 2020 $10,719 ($1,681) ($12,441) ($3,403)

Earnings Per Common Share

Earnings Per Common Share	9 Months Ended
	Sep. 30, 2021
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 Nine Months Periods ended September 30, 2021 2020 2021 2020 Earnings per common share - basic: Net income $18,751 $18,322 $56,682 $51,263 Less: dividends and undistributed earnings allocated to participating securities (55) (37) (163) (109) Net income available to common shareholders $18,696 $18,285 $56,519 $51,154 Weighted average common shares 17,320 17,260 17,303 17,287 Earnings per common share - basic $1.08 $1.06 $3.27 $2.96 Earnings per common share - diluted: Net income $18,751 $18,322 $56,682 $51,263 Less: dividends and undistributed earnings allocated to participating securities (54) (37) (162) (109) Net income available to common shareholders $18,697 $18,285 $56,520 $51,154 Weighted average common shares 17,320 17,260 17,303 17,287 Dilutive effect of common stock equivalents 124 57 148 82 Weighted average diluted common shares 17,444 17,317 17,451 17,369 Earnings per common share - diluted $1.07 $1.06 $3.24 $2.95 Weighted average common stock equivalents, not included in common stock equivalents above because they were anti-dilutive, totaled 148,542 and 149,675, respectively, for the three and nine months ended September 30, 2021, compared to 223,210 and 221,047, respectively, for the same periods in 2020.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2021
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 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. Financial Instruments Whose Contract Amounts Represent Credit Risk (Unfunded Commitments) 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 $12.1 million and $11.7 million, respectively, as of September 30, 2021 and December 31, 2020. At September 30, 2021 and December 31, 2020, 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 nine months ended September 30, 2021 and 2020. A substantial portion of the standby letters of credit were supported by pledged collateral. The collateral obtained is determined based on management’s credit evaluation of the customer. Should the Corporation be required to make payments to the beneficiary, repayment from the customer to the Corporation is required. Financial Instruments Whose Notional Amounts Exceed the Amount of Credit Risk Mortgage 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. Loan Related Derivative Contracts The Corporation’s credit policies with respect to interest rate swap agreements with commercial borrowers 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) Sep 30, Dec 31, Financial instruments whose contract amounts represent credit risk (unfunded commitments): Commitments to extend credit: Commercial loans $483,296 $453,493 Home equity lines 352,999 319,744 Other loans 125,949 89,078 Standby letters of credit 12,146 11,709 Financial instruments whose notional amounts exceed the amounts of credit risk: Mortgage loan commitments: Interest rate lock commitments 97,856 167,671 Forward sale commitments 195,105 279,653 Loan related derivative contracts: Interest rate swaps with customers 998,530 991,002 Mirror swaps with counterparties 998,530 991,002 Risk participation-in agreements 147,404 92,717 Interest rate risk management contracts: Interest rate swaps 360,000 60,000 See Note 10 for additional disclosure pertaining to derivative financial instruments. ACL on Unfunded Commitments The ACL on unfunded commitments is management’s estimate of expected credit losses over the expected contractual term (or life) in which the Corporation is exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by the Corporation. Unfunded commitments for home equity lines of credit and commercial demand loans are considered unconditionally cancellable for regulatory capital purposes and, therefore, are excluded from the calculation to estimate the ACL on unfunded commitments. For each portfolio, estimated loss rates and funding factors are applied to the corresponding balance of unfunded commitments. For each portfolio, the estimated loss rates applied to unfunded commitments are the same quantitative and qualitative loss rates applied to the corresponding on-balance sheet amounts in determining the ACL on loans. The estimated funding factor applied to unfunded commitments represents the likelihood that the funding will occur and is based upon the Corporation’s average historical utilization rate for each portfolio. The ACL on unfunded commitments is included in other liabilities in the Unaudited Consolidated Balance Sheets. The ACL on unfunded commitments is adjusted through a provision for credit losses recognized in the Unaudited Consolidated Statements of Income. The activity in the ACL on unfunded commitments for the three months ended September 30, 2021 is presented below: (Dollars in thousands) Commercial Consumer CRE C&I Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $1,214 $1,045 $2,259 $56 $— $18 $18 $2,333 Provision 4 (8) (4) 4 — — — — Ending Balance $1,218 $1,037 $2,255 $60 $— $18 $18 $2,333 The activity in the ACL on unfunded commitments for the nine months ended September 30, 2021 is presented below: (Dollars in thousands) Commercial Consumer CRE C&I Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $907 $1,402 $2,309 $54 $— $19 $19 $2,382 Provision 311 (365) (54) 6 — (1) (1) (49) Ending Balance $1,218 $1,037 $2,255 $60 $— $18 $18 $2,333 The activity in the ACL on unfunded commitments for the three months ended September 30, 2020 is presented below: (Dollars in thousands) Commercial Consumer CRE C&I Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $887 $1,207 $2,094 $42 $— $19 $19 $2,155 Provision (30) 60 30 (5) — — — 25 Ending Balance $857 $1,267 $2,124 $37 $— $19 $19 $2,180 The activity in the ACL on unfunded commitments for the nine months ended September 30, 2020 is presented below: (Dollars in thousands) Commercial Consumer CRE C&I Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $136 $144 $280 $6 $— $7 $7 $293 Adoption of Topic 326 817 626 1,443 34 — 6 6 1,483 Provision (96) 497 401 (3) — 6 6 404 Ending Balance $857 $1,267 $2,124 $37 $— $19 $19 $2,180 Other Contingencies Litigation The Corporation is involved in various claims and legal proceedings arising out of the ordinary course of business. Management is of the opinion, based on its review with counsel of the development of such matters to date, that the ultimate disposition of such matters will not materially affect the consolidated balance sheets or statements of income of the Corporation.

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2021
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 in consolidation. 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 investment in the capital trusts, which is 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. Material estimates that are particularly susceptible to change are the determination of the allowance for credit losses on loans, the valuation of goodwill and identifiable intangible assets and the accounting for defined benefit pension plans.

Allowance for Credit Losses o_2

Allowance for Credit Losses on Loans (Policies)	9 Months Ended
	Sep. 30, 2021
Receivables [Abstract]
Allowance for Credits Losses on Loans	The ACL on loans is management’s current estimate of expected credit losses over the expected life of the loans. The level of the ACL on loans is based on management’s ongoing review of all relevant information, from internal and external sources, relating to past events, current conditions and reasonable and supportable forecasts. Historical credit loss experience provides the basis for the calculation of loss given default and the estimation of expected credit losses. Qualitative adjustments are made for differences in specific risk characteristics, such as differences in underwriting standards, portfolio mix, delinquency level, or term, as well as for changes in environmental conditions, that may not be reflected in historical loss rates. In accordance with the ACL policy, the methodology is reviewed no less than annually. In the first quarter of 2021, management updated its ACL methodology for pooled loans to incorporate additional econometric factors in the determination of the probability of default for each loan portfolio segment. Econometric factors are selected based on the correlation of the factor to credit losses for each loan portfolio segment. Effective January 1, 2021, the following econometric factors are utilized in the determination of the probability of default for each loan portfolio segment: the national unemployment rate (“NUR”) and gross domestic product (“GDP”) econometric factors are utilized for the commercial real estate and other consumer loan portfolio segments; the NUR and national home price index (“HPI”) econometric factors are utilized for the residential real estate and home equity portfolio segments; and the NUR econometric factor is utilized for the commercial & industrial loan portfolio segment. Prior to January 1, 2021, solely the NUR was used in the determination of the probability of default for each loan portfolio segment.

Securities (Tables)

Securities (Tables)	9 Months Ended
	Sep. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Summary of Investments	The following tables present the amortized cost, gross unrealized holding gains, gross unrealized holding losses, allowance for credit losses (“ACL”) on securities and fair value of securities by major security type and class of security: (Dollars in thousands) September 30, 2021 Amortized Cost Unrealized Gains Unrealized Losses Allowance for Credit Losses Fair Value Available for Sale Debt Securities: Obligations of U.S. government-sponsored enterprises $181,044 $63 ($2,502) $— $178,605 Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 843,485 9,532 (9,315) — 843,702 Individual name issuer trust preferred debt securities 11,363 6 (213) — 11,156 Corporate bonds 13,152 — (782) — 12,370 Total available for sale debt securities $1,049,044 $9,601 ($12,812) $— $1,045,833 (Dollars in thousands) December 31, 2020 Amortized Cost Unrealized Gains Unrealized Losses Allowance for Credit Losses Fair Value Available for Sale Debt Securities: Obligations of U.S. government-sponsored enterprises $131,186 $628 ($145) $— $131,669 Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 725,890 14,942 (527) — 740,305 Individual name issuer trust preferred debt securities 13,341 — (672) — 12,669 Corporate bonds 11,153 — (1,225) — 9,928 Total available for sale debt securities $881,570 $15,570 ($2,569) $— $894,571
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) September 30, 2021 Amortized Cost Fair Value Due in one year or less $177,689 $177,731 Due after one year to five years 410,399 410,341 Due after five years to ten years 366,885 364,137 Due after ten years 94,071 93,624 Total debt securities $1,049,044 $1,045,833
Securities in a Continuous Unrealized Loss Position	The following tables summarize available for sale debt securities in an unrealized loss position, for which an allowance for credit losses on securities has not been recorded, segregated by length of time that the securities have been in a continuous unrealized loss position: (Dollars in thousands) Less than 12 Months 12 Months or Longer Total September 30, 2021 # Fair Unrealized # Fair Unrealized # Fair Unrealized Obligations of U.S. government-sponsored enterprises 14 $167,238 ($2,499) 1 $497 ($3) 15 $167,735 ($2,502) Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 36 506,511 (8,472) 12 46,265 (843) 48 552,776 (9,315) Individual name issuer trust preferred debt securities — — — 3 9,157 (213) 3 9,157 (213) Corporate bonds — — — 4 12,370 (782) 4 12,370 (782) Total 50 $673,749 ($10,971) 20 $68,289 ($1,841) 70 $742,038 ($12,812) (Dollars in thousands) Less than 12 Months 12 Months or Longer Total December 31, 2020 # Fair Unrealized # Fair Unrealized # Fair Unrealized Obligations of U.S. government-sponsored enterprises 6 $63,856 ($145) — $— $— 6 $63,856 ($145) Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 16 107,283 (527) — — — 16 107,283 (527) Individual name issuer trust preferred debt securities — — — 5 12,669 (672) 5 12,669 (672) Corporate bonds — — — 3 9,928 (1,225) 3 9,928 (1,225) Total 22 $171,139 ($672) 8 $22,597 ($1,897) 30 $193,736 ($2,569)

Loans (Tables)

Loans (Tables)	9 Months Ended
	Sep. 30, 2021
Receivables [Abstract]
Summary of Loans	The following is a summary of loans: (Dollars in thousands) September 30, December 31, 2020 Commercial: Commercial real estate (1) $1,661,785 $1,633,024 Commercial & industrial (2) 682,774 817,408 Total commercial 2,344,559 2,450,432 Residential Real Estate: Residential real estate (3) 1,672,364 1,467,312 Consumer: Home equity 249,874 259,185 Other (4) 19,607 19,061 Total consumer 269,481 278,246 Total loans (5) $4,286,404 $4,195,990 (1) Commercial real estate (“CRE”) 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) Commercial and industrial (“C&I”) consists of loans to businesses and individuals, a portion of which are fully or partially collateralized by real estate. C&I also includes $77.4 million and $199.8 million, respectively, of PPP loans as of September 30, 2021 and December 31, 2020. (3) Residential real estate consists of mortgage and homeowner construction loans secured by one- to four-family residential properties. (4) Other consists of loans to individuals secured by general aviation aircraft and other personal installment loans. (5) Includes net unamortized loan origination costs of $5.0 million and $1.5 million, respectively, at September 30, 2021 and December 31, 2020 and net unamortized premiums on purchased loans of $489 thousand and $787 thousand, respectively, at September 30, 2021 and December 31, 2020.
Past Due Loans	The following tables present an age analysis of loans, segregated by class of loans: (Dollars in thousands) Days Past Due September 30, 2021 30-59 60-89 Over 90 Total Past Due Current Total Loans Commercial: Commercial real estate $— $— $— $— $1,661,785 $1,661,785 Commercial & industrial 1 1 — 2 682,772 682,774 Total commercial 1 1 — 2 2,344,557 2,344,559 Residential Real Estate: Residential real estate 3,452 2,319 2,927 8,698 1,663,666 1,672,364 Consumer: Home equity 398 323 103 824 249,050 249,874 Other 19 5 — 24 19,583 19,607 Total consumer 417 328 103 848 268,633 269,481 Total loans $3,870 $2,648 $3,030 $9,548 $4,276,856 $4,286,404 (Dollars in thousands) Days Past Due December 31, 2020 30-59 60-89 Over 90 Total Past Due Current Total Loans Commercial: Commercial real estate $265 $— $— $265 $1,632,759 $1,633,024 Commercial & industrial 1 2 — 3 817,405 817,408 Total commercial 266 2 — 268 2,450,164 2,450,432 Residential Real Estate: Residential real estate 4,466 701 5,172 10,339 1,456,973 1,467,312 Consumer: Home equity 894 129 644 1,667 257,518 259,185 Other 23 7 88 118 18,943 19,061 Total consumer 917 136 732 1,785 276,461 278,246 Total loans $5,649 $839 $5,904 $12,392 $4,183,598 $4,195,990
Nonaccrual Loans	The following table presents the carrying value of nonaccrual loans: (Dollars in thousands) Sep 30, Dec 31, Commercial: Commercial real estate $— $— Commercial & industrial — — Total commercial — — Residential Real Estate: Residential real estate 10,321 11,981 Consumer: Home equity 655 1,128 Other — 88 Total consumer 655 1,216 Total nonaccrual loans $10,976 $13,197 Accruing loans 90 days or more past due $— $— Nonaccrual loans of $4.0 million and $4.7 million, respectively, at September 30, 2021 and December 31, 2020 were current as to the payment of principal and interest. No ACL was deemed necessary on nonaccrual loans with a carrying value of $4.0 million and $3.0 million, respectively, as of September 30, 2021 and December 31, 2020. As of September 30, 2021 and December 31, 2020, nonaccrual loans secured by one- to four-family residential property amounting to $1.5 million and $3.4 million, respectively, were in process of foreclosure. There were no significant commitments to lend additional funds to borrowers whose loans were on nonaccrual status at September 30, 2021. The following table presents interest income recognized on nonaccrual loans: (Dollars in thousands) Three Months Nine Months Periods ended September 30, 2021 2020 2021 2020 Commercial: Commercial real estate $— $— $— $— Commercial & industrial — — — — Total commercial — — — — Residential Real Estate: Residential real estate 131 70 288 341 Consumer: Home equity 9 11 44 51 Other — — — — Total consumer 9 11 44 51 Total $140 $81 $332 $392
Summary of TDRs	The following table presents the recorded investment in TDRs and other pertinent information: (Dollars in thousands) Sep 30, Dec 31, Accruing TDRs $8,047 $13,418 Nonaccrual TDRs 1,732 2,345 Total TDRs $9,779 $15,763 Specific reserves on TDRs included in the ACL on loans $195 $159 Additional commitments to lend to borrowers with TDRs $— $— The following tables present TDRs occurring during the period indicated and the recorded investment pre- and post- modification: (Dollars in thousands) Outstanding Recorded Investment # of Loans Pre-Modifications Post-Modifications Three months ended September 30, 2021 2020 2021 2020 2021 2020 Commercial: Commercial real estate — — $— $— $— $— Commercial & industrial — — — — — — Total commercial — — — — — — Residential Real Estate: Residential real estate — 4 — 2,092 — 2,092 Consumer: Home equity — 1 — 71 — 71 Other — — — — — — Total consumer — 1 $— $71 $— $71 Total — 5 $— $2,163 $— $2,163 (Dollars in thousands) Outstanding Recorded Investment # of Loans Pre-Modifications Post-Modifications Nine months ended September 30, 2021 2020 2021 2020 2021 2020 Commercial: Commercial real estate — 1 $— $841 $— $841 Commercial & industrial — 2 — 460 — 460 Total commercial — 3 — 1,301 — 1,301 Residential Real Estate: Residential real estate — 10 — 5,604 — 5,604 Consumer: Home equity — 4 — 873 — 873 Other — — — — — — Total consumer — 4 $— $873 $— $873 Total — 17 $— $7,778 $— $7,778
TDRs by type of modification	The following table presents TDRs occurring during the period indicated by type of modification: (Dollars in thousands) Three Months Nine Months Periods ended September 30, 2021 2020 2021 2020 Below-market interest rate concession $— $— $— $— Payment deferral — 2,163 — 7,365 Maturity / amortization concession — — — — Interest only payments — — — — Combination (1) — — — 413 Total $— $2,163 $— $7,778 (1) Loans included in this classification were modified with a combination of any two of the concessions listed in this table.
TDRs with payment default	The following tables present information on TDRs modified within the previous 12 months for which there was a payment default: (Dollars in thousands) # of Loans Recorded Investment Three months ended September 30, 2021 2020 2021 2020 TDRs with a Payment Default: Residential real estate 1 1 $330 $903 Home equity — 1 — 47 Totals 1 2 $330 $950 (Dollars in thousands) # of Loans Recorded Investment Nine months ended September 30, 2021 2020 2021 2020 TDRs with a Payment Default: Residential real estate 1 1 $330 $903 Home equity — 1 — 47 Totals 1 2 $330 $950
Collateral Dependent Individually Analyzed Loans	The following table presents the carrying value of collateral dependent individually analyzed loans: (Dollars in thousands) September 30, 2021 December 31, 2020 Carrying Value Related Allowance Carrying Value Related Allowance Commercial: Commercial real estate (1) $4,009 $321 $1,792 $— Commercial & industrial (2) — — 451 — Total commercial 4,009 321 2,243 — Residential Real Estate: Residential real estate (3) 3,716 538 5,947 38 Consumer: Home equity (3) — — 254 183 Other — — — — Total consumer — — 254 183 Total $7,725 $859 $8,444 $221 (1) Secured by income-producing property. (2) Secured by business assets. (3) Secured by one- to four-family residential properties.
Credit Quality Indicators	The following table summarizes the Corporation’s loan portfolio by credit quality indicator and loan portfolio segment as of September 30, 2021: (Dollars in thousands) Term Loans Amortized Cost by Origination Year 2021 2020 2019 2018 2017 Prior Revolving Loans Amortized Cost Revolving Loans Converted to Term Loans Total Commercial: CRE: Pass $260,038 $250,606 $305,492 $215,877 $179,618 $322,267 $8,466 $2,279 $1,544,643 Special Mention 6,002 786 29,670 37,010 16,091 23,209 364 — 113,132 Classified — 4,010 — — — — — — 4,010 Total CRE 266,040 255,402 335,162 252,887 195,709 345,476 8,830 2,279 1,661,785 C&I: Pass 120,412 96,441 106,652 90,595 52,440 99,439 87,001 1,096 654,076 Special Mention — — 642 4,641 6,419 13,019 1,186 — 25,907 Classified — — — — — 2,791 — — 2,791 Total C&I 120,412 96,441 107,294 95,236 58,859 115,249 88,187 1,096 682,774 Residential Real Estate: Residential real estate: Current 573,380 387,179 174,478 99,480 95,794 333,355 — — 1,663,666 Past Due — 1,407 272 1,299 763 4,957 — — 8,698 Total residential real estate 573,380 388,586 174,750 100,779 96,557 338,312 — — 1,672,364 Consumer: Home equity: Current 8,170 7,294 4,315 2,682 1,125 3,939 213,010 8,515 249,050 Past Due — — — — — 185 241 398 824 Total home equity 8,170 7,294 4,315 2,682 1,125 4,124 213,251 8,913 249,874 Other: Current 6,128 3,936 1,381 708 784 6,360 286 — 19,583 Past Due 14 10 — — — — — — 24 Total other 6,142 3,946 1,381 708 784 6,360 286 — 19,607 Total Loans $974,144 $751,669 $622,902 $452,292 $353,034 $809,521 $310,554 $12,288 $4,286,404 The following table summarizes the Corporation’s loan portfolio by credit quality indicator and loan portfolio segment as of December 31, 2020: (Dollars in thousands) Term Loans Amortized Cost by Origination Year 2020 2019 2018 2017 2016 Prior Revolving Loans Amortized Cost Revolving Loans Converted to Term Loans Total Commercial: CRE: Pass $283,341 $353,875 $260,917 $236,310 $136,490 $249,359 $10,333 $2,386 $1,533,011 Special Mention 756 20,235 39,387 16,222 11,318 10,367 771 — 99,056 Classified 957 — — — — — — — 957 Total CRE 285,054 374,110 300,304 252,532 147,808 259,726 11,104 2,386 1,633,024 C&I: Pass 293,493 95,775 98,146 56,792 44,445 91,128 95,817 1,296 776,892 Special Mention 1,123 722 3,210 6,839 3,141 14,853 3,806 56 33,750 Classified 403 — — — — 6,363 — — 6,766 Total C&I 295,019 96,497 101,356 63,631 47,586 112,344 99,623 1,352 817,408 Residential Real Estate: Residential real estate: Current 463,477 253,228 146,839 155,976 128,139 309,314 — — 1,456,973 Past Due 238 1,698 1,310 886 110 6,097 — — 10,339 Total residential real estate 463,715 254,926 148,149 156,862 128,249 315,411 — — 1,467,312 Consumer: Home equity: Current 9,838 6,771 3,898 1,474 1,217 3,955 219,085 11,280 257,518 Past Due — 35 24 — — 186 310 1,112 1,667 Total home equity 9,838 6,806 3,922 1,474 1,217 4,141 219,395 12,392 259,185 Other: Current 5,214 2,241 1,237 1,544 548 7,850 308 1 18,943 Past Due 19 1 — — 88 7 3 — 118 Total other 5,233 2,242 1,237 1,544 636 7,857 311 1 19,061 Total Loans $1,058,859 $734,581 $554,968 $476,043 $325,496 $699,479 $330,433 $16,131 $4,195,990 Consistent with industry practice, Washington Trust may renew commercial loans at or immediately prior to their maturity. In the tables above, renewals subject to full credit evaluation before being granted are reported as originations in the period renewed.

Allowance for Credit Losses o_3

Allowance for Credit Losses on Loans (Tables)	9 Months Ended
	Sep. 30, 2021
Receivables [Abstract]
Allowance for Credit Losses on Loans Rollforward	The following table presents the activity in the ACL on loans for the three months ended September 30, 2021: (Dollars in thousands) Commercial Consumer CRE C&I Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $21,450 $11,717 $33,167 $6,877 $1,340 $495 $1,835 $41,879 Charge-offs — 2 2 (57) (183) (11) (194) (249) Recoveries — — — 5 73 3 76 81 Provision (613) (392) (1,005) 1,131 (112) (14) (126) — Ending Balance $20,837 $11,327 $32,164 $7,956 $1,118 $473 $1,591 $41,711 The following table presents the activity in the ACL on loans for the nine months ended September 30, 2021: (Dollars in thousands) Commercial Consumer CRE C&I Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $22,065 $12,228 $34,293 $8,042 $1,300 $471 $1,771 $44,106 Charge-offs — (304) (304) (107) (183) (36) (219) (630) Recoveries — 3 3 85 79 19 98 186 Provision (1,228) (600) (1,828) (64) (78) 19 (59) (1,951) Ending Balance $20,837 $11,327 $32,164 $7,956 $1,118 $473 $1,591 $41,711 The following table presents the activity in the allowance for loan losses for the three months ended September 30, 2020: (Dollars in thousands) Commercial Consumer CRE C&I Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $20,283 $11,278 $31,561 $8,053 $1,394 $433 $1,827 $41,441 Charge-offs — (2) (2) (99) — (10) (10) (111) Recoveries — 2 2 — 4 9 13 15 Provision 1,474 (93) 1,381 (35) (51) 5 (46) 1,300 Ending Balance $21,757 $11,185 $32,942 $7,919 $1,347 $437 $1,784 $42,645 The following table presents the activity in the allowance for loan losses for the nine months ended September 30, 2020: (Dollars in thousands) Commercial Consumer CRE C&I Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $14,741 $3,921 $18,662 $6,615 $1,390 $347 $1,737 $27,014 Adoption of ASC 326 3,405 3,029 6,434 221 (106) (48) (154) 6,501 Charge-offs (172) (585) (757) (99) (174) (42) (216) (1,072) Recoveries — 11 11 — 11 23 34 45 Provision 3,783 4,809 8,592 1,182 226 157 383 10,157 Ending Balance $21,757 $11,185 $32,942 $7,919 $1,347 $437 $1,784 $42,645

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2021
Leases [Abstract]
Schedule of Operating Lease Terms	The following table presents information regarding the Corporation’s operating leases: Sep 30, 2021 Dec 31, 2020 Weighted average discount rate 3.35 % 3.34 % Range of lease expiration dates 10 months - 19 years 7 months - 20 years Range of lease renewal options 1 year - 5 years 1 year - 5 years Weighted average remaining lease term 13.0 years 13.4 years
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 September 30, 2021, including a reconciliation to the present value of operating lease liabilities recognized in the Unaudited Consolidated Balance Sheets: (Dollars in thousands) October 1, 2021 to December 31, 2021 $978 2022 3,981 2023 3,881 2024 3,670 2025 2,932 2026 and thereafter 22,099 Total operating lease payments (1) 37,541 Less: interest 7,731 Present value of operating lease liabilities (2) $29,810 (1) Includes $1.4 million related to options to extend lease terms that are reasonably certain of being exercised. (2) Includes short-term operating lease liabilities of $3.1 million.
Schedule of Total Lease Expense	The following table presents the components of total lease expense and operating cash flows: (Dollars in thousands) Three Months Nine Months Periods ended September 30, 2021 2020 2021 2020 Lease Expense: Operating lease expense $1,004 $1,005 $3,011 $2,915 Variable lease expense 10 14 44 41 Total lease expense (1) $1,014 $1,019 $3,055 $2,956 Cash Paid: Cash paid reducing operating lease liabilities $932 $956 $2,910 $2,831 (1) Included in net occupancy expenses in the Unaudited Consolidated Income Statement.

Federal Home Loan Bank Advanc_2

Federal Home Loan Bank Advances (Tables)	9 Months Ended
	Sep. 30, 2021
Debt Disclosure [Abstract]
Federal Home Loan Bank Advances Maturity Summary	The following table presents maturities and weighted average interest rates on FHLB advances outstanding as of September 30, 2021: (Dollars in thousands) Scheduled Weighted October 1, 2021 to December 31, 2021 $142,450 0.39 % 2022 — — 2023 35,000 0.45 2024 35,000 2.45 2025 — — 2026 and thereafter 10,142 3.06 Balance at September 30, 2021 $222,592 0.84 %

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2021
Broker-Dealer, Net Capital Requirement, SEC Regulation [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 September 30, 2021 Total Capital (to Risk-Weighted Assets): Corporation $569,424 13.83 % $329,407 8.00 % N/A N/A Bank 559,605 13.59 329,378 8.00 $411,723 10.00 % Tier 1 Capital (to Risk-Weighted Assets): Corporation 535,552 13.01 247,055 6.00 N/A N/A Bank 525,733 12.77 247,034 6.00 329,378 8.00 Common Equity Tier 1 Capital (to Risk-Weighted Assets): Corporation 513,553 12.47 185,291 4.50 N/A N/A Bank 525,733 12.77 185,275 4.50 267,620 6.50 Tier 1 Capital (to Average Assets): (1) Corporation 535,552 9.12 234,803 4.00 N/A N/A Bank 525,733 8.96 234,722 4.00 293,403 5.00 December 31, 2020 Total Capital (to Risk-Weighted Assets): Corporation 539,496 13.51 319,532 8.00 N/A N/A Bank 534,288 13.38 319,503 8.00 399,379 10.00 Tier 1 Capital (to Risk-Weighted Assets): Corporation 503,791 12.61 239,649 6.00 N/A N/A Bank 498,583 12.48 239,627 6.00 319,503 8.00 Common Equity Tier 1 Capital (to Risk-Weighted Assets): Corporation 481,792 12.06 179,737 4.50 N/A N/A Bank 498,583 12.48 179,721 4.50 259,596 6.50 Tier 1 Capital (to Average Assets): (1) Corporation 503,791 8.95 225,209 4.00 N/A N/A Bank 498,583 8.86 225,126 4.00 281,407 5.00 (1) Leverage ratio.

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2021
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 Unaudited Consolidated Balance Sheets: (Dollars in thousands) Derivative Assets Derivative Liabilities Fair Value Fair Value Balance Sheet Location Sep 30, 2021 Dec 31, 2020 Balance Sheet Location Sep 30, 2021 Dec 31, 2020 Derivatives Designated as Cash Flow Hedging Instruments: Interest rate risk management contracts: Interest rate swaps Other assets $180 $— Other liabilities $2,006 $1,958 Derivatives not Designated as Hedging Instruments: Loan related derivative contracts: Interest rate swaps with customers Other assets 42,873 75,804 Other liabilities 1,667 68 Mirror swaps with counterparties Other assets 1,649 67 Other liabilities 42,996 76,248 Risk participation agreements Other assets 1 22 Other liabilities 2 2 Mortgage loan commitments: Interest rate lock commitments Other assets 2,344 7,202 Other liabilities — — Forward sale commitments Other assets 703 — Other liabilities 1,024 2,914 Gross amounts 47,750 83,095 47,695 81,190 Less: amounts offset (1) 1,828 67 1,828 67 Derivative balances, net of offset 45,922 83,028 45,867 81,123 Less: collateral pledged (2) — — 39,109 74,698 Net amounts $45,922 $83,028 $6,758 $6,425 (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 table presents the effect of derivative instruments in the Unaudited Consolidated Statements of Changes in Shareholders’ Equity: (Dollars in thousands) Gain (Loss) Recognized in Three Months Nine Months Periods ended September 30, 2021 2020 2021 2020 Derivatives Designated as Cash Flow Hedging Instruments: Interest rate risk management contracts: Interest rate swaps ($403) $214 ($36) ($1,109) Interest rate caps — 25 — 71 Interest rate floors — (85) — 150 Total ($403) $154 ($36) ($888) Interest rate cap and interest rate floor contracts designated as cash flow hedges matured in 2020. For derivatives designated as cash flow hedging instruments, see Note 16 for additional disclosure pertaining to the amounts and location of reclassifications from accumulated other comprehensive income into earnings. The following table presents the effect of derivative instruments in the Corporation’s Unaudited Consolidated Statements of Income: (Dollars in thousands) Amount of Gain (Loss) Three Months Nine Months Periods ended September 30, Statement of Income Location 2021 2020 2021 2020 Derivatives not Designated as Hedging Instruments: Loan related derivative contracts: Interest rate swaps with customers Loan related derivative income ($2,715) $767 ($21,281) $67,258 Mirror swaps with counterparties Loan related derivative income 3,558 499 23,173 (63,655) Risk participation agreements Loan related derivative income (115) (2) 478 215 Mortgage loan commitments: Interest rate lock commitments Mortgage banking revenues (17) (1,499) (4,859) 5,785 Forward sale commitments Mortgage banking revenues (361) (4,743) 4,994 (10,733) Total $350 ($4,978) $2,505 ($1,130)

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2021
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) September 30, December 31, Aggregate fair value $48,705 $61,614 Aggregate principal balance 47,464 59,313 Difference between fair value and principal balance $1,241 $2,301
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 Significant Other Observable Inputs Significant Unobservable Inputs September 30, 2021 Assets: Available for sale debt securities: Obligations of U.S. government-sponsored enterprises $178,605 $— $178,605 $— Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 843,702 — 843,702 — Individual name issuer trust preferred debt securities 11,156 — 11,156 — Corporate bonds 12,370 — 12,370 — Mortgage loans held for sale 48,705 — 48,705 — Derivative assets 45,922 — 45,922 — Total assets at fair value on a recurring basis $1,140,460 $— $1,140,460 $— Liabilities: Derivative liabilities $45,867 $— $45,867 $— Total liabilities at fair value on a recurring basis $45,867 $— $45,867 $— (Dollars in thousands) Total Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs December 31, 2020 Assets: Available for sale debt securities: Obligations of U.S. government-sponsored enterprises $131,669 $— $131,669 $— Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 740,305 — 740,305 — Individual name issuer trust preferred debt securities 12,669 — 12,669 — Corporate bonds 9,928 — 9,928 — Mortgage loans held for sale 61,614 — 61,614 — Derivative assets 83,028 — 83,028 — Total assets at fair value on a recurring basis $1,039,213 $— $1,039,213 $— Liabilities: Derivative liabilities $81,123 $— $81,123 $— Total liabilities at fair value on a recurring basis $81,123 $— $81,123 $—
Items Recorded at Fair Value on a Nonrecurring Basis	The following table presents the carrying value of assets held at September 30, 2021, which were written down to fair value during the nine months ended September 30, 2021: (Dollars in thousands) Total Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Assets: Collateral dependent individually analyzed loans $3,563 $— $— $3,563 Total assets at fair value on a nonrecurring basis $3,563 $— $— $3,563 The following table presents the carrying value of assets held at December 31, 2020, which were written down to fair value during the year ended December 31, 2020: (Dollars in thousands) Total Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Assets: Collateral dependent individually analyzed loans $1,720 $— $— $1,720 Loan servicing rights 7,434 — — 7,434 Total assets at fair value on a nonrecurring basis $9,154 $— $— $9,154
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 September 30, 2021 Collateral dependent individually analyzed loans $3,563 Appraisals of collateral Discount for costs to sell 0% - 14% (11%) Appraisal adjustments 0% - 100% (15%) (Dollars in thousands) Fair Value Valuation Technique Unobservable Input Range of Inputs Utilized December 31, 2020 Collateral dependent individually analyzed loans $1,720 Appraisals of collateral Discount for costs to sell 0% - 25% (11%) Appraisal adjustments 0% - 100% (15%) Loan servicing rights 7,434 Discounted cash flow Discount rates 10% - 14% (10%) Prepayment rates 18% - 42% (21%)
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) September 30, 2021 Carrying Amount Total Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Financial Assets: Loans, net of allowance for credit losses on loans $4,244,693 $4,174,632 $— $— $4,174,632 Financial Liabilities: Time deposits $1,464,284 $1,468,196 $— $1,468,196 $— FHLB advances 222,592 225,069 — 225,069 — Junior subordinated debentures 22,681 20,136 — 20,136 — (Dollars in thousands) December 31, 2020 Carrying Amount Total Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Financial Assets: Loans, net of allowance for credit losses on loans $4,151,884 $4,114,628 $— $— $4,114,628 Financial Liabilities: Time deposits $1,296,396 $1,302,128 $— $1,302,128 $— FHLB advances 593,859 602,000 — 602,000 — Junior subordinated debentures 22,681 19,422 — 19,422 —

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	9 Months Ended
	Sep. 30, 2021
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 that are from contracts with customers within the scope of ASC 606. As shown below, a substantial portion of our revenues are specifically excluded from the scope of ASC 606. For the three months ended September 30, 2021 2020 (Dollars in thousands) Revenue (1) ASC 606 Revenue (2) Revenue (1) ASC 606 Revenue (2) Net interest income $36,070 $— $31,654 $— Noninterest income: Asset-based wealth management revenues 10,224 10,224 8,786 8,786 Transaction-based wealth management revenues 231 231 168 168 Total wealth management revenues 10,455 10,455 8,954 8,954 Mortgage banking revenues 6,373 — 12,353 — Card interchange fees 1,265 1,265 1,161 1,161 Service charges on deposit accounts 673 673 598 598 Loan related derivative income 728 — 1,264 — Income from bank-owned life insurance 618 — 567 — Other income 408 310 571 491 Total noninterest income 20,520 12,703 25,468 11,204 Total revenues $56,590 $12,703 $57,122 $11,204 (1) As reported in the Consolidated Statements of Income. (2) Revenue from contracts with customers in scope of ASC 606. For the nine months ended September 30, 2021 2020 (Dollars in thousands) Revenue (1) ASC 606 Revenue (2) Revenue (1) ASC 606 Revenue (2) Net interest income $103,695 $— $95,201 $— Noninterest income: Asset-based wealth management revenues 29,798 29,798 25,297 25,297 Transaction-based wealth management revenues 980 980 951 951 Total wealth management revenues 30,778 30,778 26,248 26,248 Mortgage banking revenues 24,294 — 33,300 — Card interchange fees 3,714 3,714 3,139 3,139 Service charges on deposit accounts 1,917 1,917 1,975 1,975 Loan related derivative income 2,370 — 3,818 — Income from bank-owned life insurance 1,781 — 1,922 — Other income 2,233 1,834 1,313 1,026 Total noninterest income 67,087 38,243 71,715 32,388 Total revenues $170,782 $38,243 $166,916 $32,388 (1) As reported in the Consolidated Statements of Income. (2) Revenue from contracts with customers in scope of ASC 606. The Corporation recognizes revenue that is transactional in nature and such revenue is earned at a point in time. Revenue that is recognized at a point in time includes card interchange fees (fee income related to debit card transactions), automated teller machine (“ATM”) fees, wire transfer fees, overdraft charge fees, and stop-payment and returned check fees. Such revenue is derived from transactional information and is recognized as revenue immediately as the transactions occur or upon providing the service to complete the customer’s transaction. The Corporation recognizes revenue over a period of time, generally monthly, as services are performed and performance obligations are satisfied. Such revenue includes wealth management revenues and service charges on deposit accounts. Wealth management revenues are categorized as either asset-based revenues or transaction-based revenues. Asset-based revenues include trust and investment management fees that are earned based upon a percentage of asset values under administration. Transaction-based revenues include tax preparation fees, commissions and other service fees. Fee revenue from service charges on deposit accounts represent service charges assessed to customers who hold deposit accounts at the Bank. The following table presents revenue from contracts with customers based on the timing of revenue recognition: (Dollars in thousands) Three Months Nine Months Periods ended September 30, 2021 2020 2021 2020 Revenue recognized at a point in time: Card interchange fees $1,265 $1,161 $3,714 $3,139 Service charges on deposit accounts 531 447 1,516 1,488 Other income 247 441 1,678 895 Revenue recognized over time: Wealth management revenues 10,455 8,954 30,778 26,248 Service charges on deposit accounts 142 151 401 487 Other income 63 50 156 131 Total revenues from contracts in scope of Topic 606 $12,703 $11,204 $38,243 $32,388

Defined Benefit Pension Plans (

Defined Benefit Pension Plans (Tables)	9 Months Ended
	Sep. 30, 2021
Retirement Benefits [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 Non-Qualified Retirement Plans Three Months Nine Months Three Months Nine Months Periods ended September 30, 2021 2020 2021 2020 2021 2020 2021 2020 Net Periodic Benefit Cost: Service cost (1) $592 $541 $1,777 $1,623 $52 $43 $156 $128 Interest cost (2) 500 626 1,502 1,879 84 116 253 349 Expected return on plan assets (2) (1,203) (1,135) (3,611) (3,404) — — — — Recognized net actuarial loss (2) 531 396 1,591 1,187 180 139 542 419 Net periodic benefit cost $420 $428 $1,259 $1,285 $316 $298 $951 $896 (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 nine months ended September 30, 2021 2020 2021 2020 Measurement date Dec 31, 2020 Dec 31, 2019 Dec 31, 2020 Dec 31, 2019 Equivalent single discount rate for benefit obligations 2.71% 3.42% 2.51% 3.30% Equivalent single discount rate for service cost 2.86 3.54 2.94 3.62 Equivalent single discount rate for interest cost 2.16 3.07 1.97 2.93 Expected long-term return on plan assets 5.75 5.75 N/A N/A Rate of compensation increase 3.75 3.75 3.75 3.75

Business Segments (Tables)

Business Segments (Tables)	9 Months Ended
	Sep. 30, 2021
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 September 30, 2021 2020 2021 2020 2021 2020 2021 2020 Net interest income (expense) $35,732 $33,103 ($25) ($24) $363 ($1,425) $36,070 $31,654 Provision for credit losses — 1,325 — — — — — 1,325 Net interest income (expense) after provision for credit losses 35,732 31,778 (25) (24) 363 (1,425) 36,070 30,329 Noninterest income 9,440 15,940 10,455 8,954 625 574 20,520 25,468 Noninterest expenses: Depreciation and amortization expense 718 601 341 350 46 38 1,105 989 Other noninterest expenses 20,108 20,273 7,190 7,178 4,117 3,904 31,415 31,355 Total noninterest expenses 20,826 20,874 7,531 7,528 4,163 3,942 32,520 32,344 Income (loss) before income taxes 24,346 26,844 2,899 1,402 (3,175) (4,793) 24,070 23,453 Income tax expense (benefit) 5,394 5,828 710 403 (785) (1,100) 5,319 5,131 Net income (loss) $18,952 $21,016 $2,189 $999 ($2,390) ($3,693) $18,751 $18,322 Total assets at period end $4,520,169 $4,588,419 $75,438 $74,942 $1,407,036 $1,186,431 $6,002,643 $5,849,792 Expenditures for long-lived assets 309 360 13 20 16 26 338 406 (Dollars in thousands) Commercial Banking Wealth Management Services Corporate Consolidated Total Nine months ended September 30, 2021 2020 2021 2020 2021 2020 2021 2020 Net interest income (expense) $105,579 $94,692 ($72) ($117) ($1,812) $626 $103,695 $95,201 Provision for credit losses (2,000) 10,561 — — — — (2,000) 10,561 Net interest income (expense) after provision for loan losses 107,579 84,131 (72) (117) (1,812) 626 105,695 84,640 Noninterest income 33,510 43,515 31,778 26,248 1,799 1,952 67,087 71,715 Noninterest expenses: Depreciation and amortization expense 2,040 1,832 1,044 1,058 139 116 3,223 3,006 Other noninterest expenses 60,093 56,571 20,594 20,408 16,335 11,290 97,022 88,269 Total noninterest expenses 62,133 58,403 21,638 21,466 16,474 11,406 100,245 91,275 Income (loss) before income taxes 78,956 69,243 10,068 4,665 (16,487) (8,828) 72,537 65,080 Income tax expense (benefit) 17,275 14,769 2,412 1,216 (3,832) (2,168) 15,855 13,817 Net income (loss) $61,681 $54,474 $7,656 $3,449 ($12,655) ($6,660) $56,682 $51,263 Total assets at period end $4,520,169 $4,588,419 $75,438 $74,942 $1,407,036 $1,186,431 $6,002,643 $5,849,792 Expenditures for long-lived assets 2,026 1,147 87 86 53 98 2,166 1,331

Other Comprehensive Income (L_2

Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Activity in Other Comprehensive Income (Loss)	The following tables present the activity in other comprehensive income (loss): Three months ended September 30, 2021 2020 (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 ($4,127) ($990) ($3,137) ($4,582) ($1,077) ($3,505) Cash flow hedges: Change in fair value of cash flow hedges (288) (69) (219) (146) (39) (107) Net cash flow hedge (losses) gains reclassified into earnings (1) (2) (243) (59) (184) 344 83 261 Net change in fair value of cash flow hedges (531) (128) (403) 198 44 154 Defined benefit plan obligations: Amortization of net actuarial losses (3) 711 171 540 535 125 410 Total other comprehensive loss ($3,947) ($947) ($3,000) ($3,849) ($908) ($2,941) (1) The pre-tax amounts for the three months ended September 30, 2021 are included in interest expense on FHLB advances and interest and fees on loans in the Unaudited Consolidated Statements of Income. (2) The pre-tax amounts for the three months ended September 30, 2020 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. Nine months ended September 30, 2021 2020 (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 ($16,212) ($3,890) ($12,322) $9,794 $2,301 $7,493 Cash flow hedges: Change in fair value of cash flow hedges (21) (5) (16) (1,994) (473) (1,521) Net cash flow hedge (losses) gains reclassified into earnings (1) (2) (27) (7) (20) 829 196 633 Net change in fair value of cash flow hedges (48) (12) (36) (1,165) (277) (888) Defined benefit plan obligations: Amortization of net actuarial losses (3) 2,133 512 1,621 1,606 377 1,229 Total other comprehensive (loss) income ($14,127) ($3,390) ($10,737) $10,235 $2,401 $7,834 (1) The pre-tax amounts for the nine months ended September 30, 2021 are included in interest expense on FHLB advances and interest and fees on loans in the Unaudited Consolidated Statements of Income. (2) The pre-tax amounts for the nine months ended September 30, 2020 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) Rollforward	The following tables present the changes in accumulated other comprehensive income (loss) by component, net of tax: (Dollars in thousands) Net Unrealized Gains (Losses) on Available For Sale Debt Securities Net Unrealized Losses on Cash Flow Hedges Defined Benefit Pension Plan Adjustment Total For the three months ended September 30, 2021 Balance at June 30, 2021 $696 ($1,080) ($14,744) ($15,128) Other comprehensive loss before reclassifications (3,137) (219) — (3,356) Amounts reclassified from accumulated other comprehensive income — (184) 540 356 Net other comprehensive (loss) income (3,137) (403) 540 (3,000) Balance at September 30, 2021 ($2,441) ($1,483) ($14,204) ($18,128) (Dollars in thousands) Net Unrealized Gains (Losses) on Available For Sale Debt Securities Net Unrealized Losses on Cash Flow Hedges Defined Benefit Pension Plan Adjustment Total For the nine months ended September 30, 2021 Balance at December 31, 2020 $9,881 ($1,447) ($15,825) ($7,391) Other comprehensive loss before reclassifications (12,322) (16) — (12,338) Amounts reclassified from accumulated other comprehensive income — (20) 1,621 1,601 Net other comprehensive (loss) income (12,322) (36) 1,621 (10,737) Balance at September 30, 2021 ($2,441) ($1,483) ($14,204) ($18,128) (Dollars in thousands) Net Unrealized Gains (Losses) 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 September 30, 2020 Balance at June 30, 2020 $14,224 ($1,835) ($12,851) ($462) Other comprehensive loss before reclassifications (3,505) (107) — (3,612) Amounts reclassified from accumulated other comprehensive income — 261 410 671 Net other comprehensive (loss) income (3,505) 154 410 (2,941) Balance at September 30, 2020 $10,719 ($1,681) ($12,441) ($3,403) (Dollars in thousands) Net Unrealized Gains on Available For Sale Debt Securities Net Unrealized (Losses) Gains on Cash Flow Hedges Defined Benefit Pension Plan Adjustment Total For the nine months ended September 30, 2020 Balance at December 31, 2019 $3,226 ($793) ($13,670) ($11,237) Other comprehensive income (loss) before reclassifications 7,493 (1,521) — 5,972 Amounts reclassified from accumulated other comprehensive income — 633 1,229 1,862 Net other comprehensive income (loss) 7,493 (888) 1,229 7,834 Balance at September 30, 2020 $10,719 ($1,681) ($12,441) ($3,403)

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2021
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 Nine Months Periods ended September 30, 2021 2020 2021 2020 Earnings per common share - basic: Net income $18,751 $18,322 $56,682 $51,263 Less: dividends and undistributed earnings allocated to participating securities (55) (37) (163) (109) Net income available to common shareholders $18,696 $18,285 $56,519 $51,154 Weighted average common shares 17,320 17,260 17,303 17,287 Earnings per common share - basic $1.08 $1.06 $3.27 $2.96 Earnings per common share - diluted: Net income $18,751 $18,322 $56,682 $51,263 Less: dividends and undistributed earnings allocated to participating securities (54) (37) (162) (109) Net income available to common shareholders $18,697 $18,285 $56,520 $51,154 Weighted average common shares 17,320 17,260 17,303 17,287 Dilutive effect of common stock equivalents 124 57 148 82 Weighted average diluted common shares 17,444 17,317 17,451 17,369 Earnings per common share - diluted $1.07 $1.06 $3.24 $2.95

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2021
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) Sep 30, Dec 31, Financial instruments whose contract amounts represent credit risk (unfunded commitments): Commitments to extend credit: Commercial loans $483,296 $453,493 Home equity lines 352,999 319,744 Other loans 125,949 89,078 Standby letters of credit 12,146 11,709 Financial instruments whose notional amounts exceed the amounts of credit risk: Mortgage loan commitments: Interest rate lock commitments 97,856 167,671 Forward sale commitments 195,105 279,653 Loan related derivative contracts: Interest rate swaps with customers 998,530 991,002 Mirror swaps with counterparties 998,530 991,002 Risk participation-in agreements 147,404 92,717 Interest rate risk management contracts: Interest rate swaps 360,000 60,000
Allowance for Credit Losses on Unfunded Commitments Rollforward	The activity in the ACL on unfunded commitments for the three months ended September 30, 2021 is presented below: (Dollars in thousands) Commercial Consumer CRE C&I Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $1,214 $1,045 $2,259 $56 $— $18 $18 $2,333 Provision 4 (8) (4) 4 — — — — Ending Balance $1,218 $1,037 $2,255 $60 $— $18 $18 $2,333 The activity in the ACL on unfunded commitments for the nine months ended September 30, 2021 is presented below: (Dollars in thousands) Commercial Consumer CRE C&I Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $907 $1,402 $2,309 $54 $— $19 $19 $2,382 Provision 311 (365) (54) 6 — (1) (1) (49) Ending Balance $1,218 $1,037 $2,255 $60 $— $18 $18 $2,333 The activity in the ACL on unfunded commitments for the three months ended September 30, 2020 is presented below: (Dollars in thousands) Commercial Consumer CRE C&I Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $887 $1,207 $2,094 $42 $— $19 $19 $2,155 Provision (30) 60 30 (5) — — — 25 Ending Balance $857 $1,267 $2,124 $37 $— $19 $19 $2,180 The activity in the ACL on unfunded commitments for the nine months ended September 30, 2020 is presented below: (Dollars in thousands) Commercial Consumer CRE C&I Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $136 $144 $280 $6 $— $7 $7 $293 Adoption of Topic 326 817 626 1,443 34 — 6 6 1,483 Provision (96) 497 401 (3) — 6 6 404 Ending Balance $857 $1,267 $2,124 $37 $— $19 $19 $2,180

Cash and Due from Banks (Narrat

Cash and Due from Banks (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Cash and Cash Equivalents [Abstract]
Average reserve deposited with the Board of Governors of the Federal Reserve Bank	$ 0	$ 0
Interest-bearing deposits in other banks	$ 260.3	$ 138.4

Securities (Narrative) (Details

Securities (Narrative) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021USD ($)security	Dec. 31, 2020USD ($)security
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Accrued interest receivable	$ 2,200	$ 2,400
Fair value of available for sale and held to maturity securities pledged as collateral	344,300	$ 291,900
Amortized cost of callable debt securities	204,800
Fair value of callable debt securities	$ 201,300
Available for sale debt securities, securities in continuous unrealized loss position, number of securities | security	70	30
Number of debt securities below investment grade | security	2
Individual name issuer trust preferred debt securities
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Available for sale debt securities, securities in continuous unrealized loss position, number of securities | security	3	5
Securities in unrealized loss position, number of companies issuing securities | security	3
Amortized cost of trust preferred securities of individual name issuers that are below investment grade	$ 4,000
Unrealized losses of trust preferred securities of individual name issuers that are below investment grade	$ 140
Corporate bonds [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Available for sale debt securities, securities in continuous unrealized loss position, number of securities | security	4	3
Available for Sale Securities, Continuous Unrealized Loss Position, Aggregate Losses, Accumulated Investments	$ (782)
Minimum [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Maturity period of callable debt securities	3 years
Call features of callable debt securities	1 month
Maximum [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Maturity period of callable debt securities	15 years
Call features of callable debt securities	1 year

Securities (Summary of Investme

Securities (Summary of Investments) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Available for sale debt securities, amortized cost	$ 1,049,044	$ 881,570
Available for sale debt securities, unrealized gains	9,601	15,570
Available for sale debt securities, unrealized losses	12,812	2,569
Available for sale debt securities, allowance for credit losses	0	0
Available for sale debt securities, fair value	1,045,833	894,571
Obligations of U.S. government-sponsored enterprises [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Available for sale debt securities, amortized cost	181,044	131,186
Available for sale debt securities, unrealized gains	63	628
Available for sale debt securities, unrealized losses	2,502	145
Available for sale debt securities, allowance for credit losses	0	0
Available for sale debt securities, fair value	178,605	131,669
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 Maturity Securities [Line Items]
Available for sale debt securities, amortized cost	843,485	725,890
Available for sale debt securities, unrealized gains	9,532	14,942
Available for sale debt securities, unrealized losses	9,315	527
Available for sale debt securities, allowance for credit losses	0	0
Available for sale debt securities, fair value	843,702	740,305
Individual name issuer trust preferred debt securities
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Available for sale debt securities, amortized cost	11,363	13,341
Available for sale debt securities, unrealized gains	6	0
Available for sale debt securities, unrealized losses	213	672
Available for sale debt securities, allowance for credit losses	0	0
Available for sale debt securities, fair value	11,156	12,669
Corporate bonds [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Available for sale debt securities, amortized cost	13,152	11,153
Available for sale debt securities, unrealized gains	0	0
Available for sale debt securities, unrealized losses	782	1,225
Available for sale debt securities, allowance for credit losses	0	0
Available for sale debt securities, fair value	$ 12,370	$ 9,928

Securities (Securities by Contr

Securities (Securities by Contractual Maturity) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Available for sale debt securities maturities within 1 year amortized cost	$ 177,689
Available for sale debt securities maturities 1-5 years amortized cost	410,399
Available for sale debt securities maturities 5-10 years amortized cost	366,885
Available for sale debt securities maturities after 10 years amortized cost	94,071
Available for sale debt securities maturities total amortized cost	1,049,044	$ 881,570
Available for sale debt securities maturities within 1 year fair value	177,731
Available for sale debt securities maturities 1-5 years fair value	410,341
Available for sale debt securities maturities 5-10 years fair value	364,137
Available for sale debt securities maturities after 10 years fair value	93,624
Available for sale debt securities, fair value	$ 1,045,833	$ 894,571

Securities (Securities in a Con

Securities (Securities in a Continuous Unrealized Loss Position) (Details) $ in Thousands	Sep. 30, 2021USD ($)security	Dec. 31, 2020USD ($)security
Debt Securities, Available-for-sale [Line Items]
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, number of securities | security	50	22
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, fair value	$ 673,749	$ 171,139
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, unrealized losses	$ 10,971	$ 672
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, number of securities | security	20	8
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, fair value	$ 68,289	$ 22,597
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, unrealized losses	$ 1,841	$ 1,897
Available for sale debt securities, securities in continuous unrealized loss position, number of securities | security	70	30
Available for sale debt securities, securities in continuous unrealized loss position, fair value	$ 742,038	$ 193,736
Available for sale debt securities, securities in continuous unrealized loss position, unrealized losses	$ 12,812	$ 2,569
Obligations of U.S. government-sponsored enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, number of securities | security	14	6
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, fair value	$ 167,238	$ 63,856
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, unrealized losses	$ 2,499	$ 145
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, number of securities | security	1	0
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, fair value	$ 497	$ 0
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, unrealized losses	$ 3	$ 0
Available for sale debt securities, securities in continuous unrealized loss position, number of securities | security	15	6
Available for sale debt securities, securities in continuous unrealized loss position, fair value	$ 167,735	$ 63,856
Available for sale debt securities, securities in continuous unrealized loss position, unrealized losses	$ 2,502	$ 145
Mortgage-backed securities issued by U.S. government-sponsored agencies and U.S. government-sponsored enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, number of securities | security	36	16
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, fair value	$ 506,511	$ 107,283
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, unrealized losses	$ 8,472	$ 527
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, number of securities | security	12	0
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, fair value	$ 46,265	$ 0
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, unrealized losses	$ 843	$ 0
Available for sale debt securities, securities in continuous unrealized loss position, number of securities | security	48	16
Available for sale debt securities, securities in continuous unrealized loss position, fair value	$ 552,776	$ 107,283
Available for sale debt securities, securities in continuous unrealized loss position, unrealized losses	$ 9,315	$ 527
Individual name issuer trust preferred debt securities
Debt Securities, Available-for-sale [Line Items]
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, number of securities | security	0	0
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, fair value	$ 0	$ 0
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, unrealized losses	$ 0	$ 0
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, number of securities | security	3	5
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, fair value	$ 9,157	$ 12,669
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, unrealized losses	$ 213	$ 672
Available for sale debt securities, securities in continuous unrealized loss position, number of securities | security	3	5
Available for sale debt securities, securities in continuous unrealized loss position, fair value	$ 9,157	$ 12,669
Available for sale debt securities, securities in continuous unrealized loss position, unrealized losses	$ 213	$ 672
Corporate bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, number of securities | security	0	0
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, fair value	$ 0	$ 0
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, unrealized losses	$ 0	$ 0
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, number of securities | security	4	3
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, fair value	$ 12,370	$ 9,928
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, unrealized losses	$ 782	$ 1,225
Available for sale debt securities, securities in continuous unrealized loss position, number of securities | security	4	3
Available for sale debt securities, securities in continuous unrealized loss position, fair value	$ 12,370	$ 9,928
Available for sale debt securities, securities in continuous unrealized loss position, unrealized losses	$ 782	$ 1,225

Loans (Narrative) (Details)

Loans (Narrative) (Details) $ in Thousands		Sep. 30, 2021USD ($)loan	Dec. 31, 2020USD ($)
Carrying value of PPP loans		$ 77,400	$ 199,800
Loans Receivable Net Deferred Cost Originated		5,000	1,500
Loans Receivable Net Deferred Premium on Purchased Loans		489	787
Accrued interest receivable on loans		11,100	11,300
Loans pledged as collateral		$ 2,200,000	2,100,000
Number of executed loan modifications due to COVID-19 | loan		654
Balance of executed loan modifications due to COVID-19		$ 728,000
Number of active deferments due to COVID-19 | loan		5
Balance of active deferments due to COVID-19		$ 38,000
Past due loans included in nonaccrual loans		6,900	8,500
Nonaccrual loans with no ACL		4,000	3,000
Residential loans in process of foreclosure		1,500	3,400
Nonaccrual loans current on payment		4,000	4,700
Individually analyzed loans		15,500	18,300
Collateral dependent loans	[1]	$ 4,286,404	4,195,990
Active deferments as % of total loans excl PPP loans		1.00%
Collateral Dependent Individually Analyzed
Collateral dependent loans		$ 7,725	$ 8,444
[1]	Includes net unamortized loan origination costs of $5.0 million and $1.5 million, respectively, at September 30, 2021 and December 31, 2020 and net unamortized premiums on purchased loans of $489 thousand and $787 thousand, respectively, at September 30, 2021 and December 31, 2020.

Loans (Summary of Loans) (Detai

Loans (Summary of Loans) (Details) - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	[1]	$ 4,286,404	$ 4,195,990
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	[2]	1,661,785	1,633,024
Commercial & Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	[3]	682,774	817,408
Total Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		2,344,559	2,450,432
Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	[4]	1,672,364	1,467,312
Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		249,874	259,185
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	[5]	19,607	19,061
Total Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		$ 269,481	$ 278,246
[1]	Includes net unamortized loan origination costs of $5.0 million and $1.5 million, respectively, at September 30, 2021 and December 31, 2020 and net unamortized premiums on purchased loans of $489 thousand and $787 thousand, respectively, at September 30, 2021 and December 31, 2020.
[2]	Commercial real estate (“CRE”) 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]	Commercial and industrial (“C&I”) consists of loans to businesses and individuals, a portion of which are fully or partially collateralized by real estate. C&I also includes $77.4 million and $199.8 million, respectively, of PPP loans as of September 30, 2021 and December 31, 2020.
[4]	Residential real estate consists of mortgage and homeowner construction loans secured by one- to four-family residential properties.
[5]	Other 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		Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Past due		$ 9,548	$ 12,392
Current		4,276,856	4,183,598
Total loans	[1]	4,286,404	4,195,990
30-59
Financing Receivable, Past Due [Line Items]
Past due		3,870	5,649
60-89
Financing Receivable, Past Due [Line Items]
Past due		2,648	839
Over 90
Financing Receivable, Past Due [Line Items]
Past due		3,030	5,904
Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Past due		0	265
Current		1,661,785	1,632,759
Total loans	[2]	1,661,785	1,633,024
Commercial Real Estate | 30-59
Financing Receivable, Past Due [Line Items]
Past due		0	265
Commercial Real Estate | 60-89
Financing Receivable, Past Due [Line Items]
Past due		0	0
Commercial Real Estate | Over 90
Financing Receivable, Past Due [Line Items]
Past due		0	0
Commercial & Industrial
Financing Receivable, Past Due [Line Items]
Past due		2	3
Current		682,772	817,405
Total loans	[3]	682,774	817,408
Commercial & Industrial | 30-59
Financing Receivable, Past Due [Line Items]
Past due		1	1
Commercial & Industrial | 60-89
Financing Receivable, Past Due [Line Items]
Past due		1	2
Commercial & Industrial | Over 90
Financing Receivable, Past Due [Line Items]
Past due		0	0
Total Commercial
Financing Receivable, Past Due [Line Items]
Past due		2	268
Current		2,344,557	2,450,164
Total loans		2,344,559	2,450,432
Total Commercial | 30-59
Financing Receivable, Past Due [Line Items]
Past due		1	266
Total Commercial | 60-89
Financing Receivable, Past Due [Line Items]
Past due		1	2
Total Commercial | Over 90
Financing Receivable, Past Due [Line Items]
Past due		0	0
Residential Real Estate
Financing Receivable, Past Due [Line Items]
Past due		8,698	10,339
Current		1,663,666	1,456,973
Total loans	[4]	1,672,364	1,467,312
Residential Real Estate | 30-59
Financing Receivable, Past Due [Line Items]
Past due		3,452	4,466
Residential Real Estate | 60-89
Financing Receivable, Past Due [Line Items]
Past due		2,319	701
Residential Real Estate | Over 90
Financing Receivable, Past Due [Line Items]
Past due		2,927	5,172
Home Equity
Financing Receivable, Past Due [Line Items]
Past due		824	1,667
Current		249,050	257,518
Total loans		249,874	259,185
Home Equity | 30-59
Financing Receivable, Past Due [Line Items]
Past due		398	894
Home Equity | 60-89
Financing Receivable, Past Due [Line Items]
Past due		323	129
Home Equity | Over 90
Financing Receivable, Past Due [Line Items]
Past due		103	644
Other
Financing Receivable, Past Due [Line Items]
Past due		24	118
Current		19,583	18,943
Total loans	[5]	19,607	19,061
Other | 30-59
Financing Receivable, Past Due [Line Items]
Past due		19	23
Other | 60-89
Financing Receivable, Past Due [Line Items]
Past due		5	7
Other | Over 90
Financing Receivable, Past Due [Line Items]
Past due		0	88
Total Consumer
Financing Receivable, Past Due [Line Items]
Past due		848	1,785
Current		268,633	276,461
Total loans		269,481	278,246
Total Consumer | 30-59
Financing Receivable, Past Due [Line Items]
Past due		417	917
Total Consumer | 60-89
Financing Receivable, Past Due [Line Items]
Past due		328	136
Total Consumer | Over 90
Financing Receivable, Past Due [Line Items]
Past due		$ 103	$ 732
[1]	Includes net unamortized loan origination costs of $5.0 million and $1.5 million, respectively, at September 30, 2021 and December 31, 2020 and net unamortized premiums on purchased loans of $489 thousand and $787 thousand, respectively, at September 30, 2021 and December 31, 2020.
[2]	Commercial real estate (“CRE”) 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]	Commercial and industrial (“C&I”) consists of loans to businesses and individuals, a portion of which are fully or partially collateralized by real estate. C&I also includes $77.4 million and $199.8 million, respectively, of PPP loans as of September 30, 2021 and December 31, 2020.
[4]	Residential real estate consists of mortgage and homeowner construction loans secured by one- to four-family residential properties.
[5]	Other consists of loans to individuals secured by general aviation aircraft and other personal installment loans.

Loans (Nonaccrual Loans) (Detai

Loans (Nonaccrual Loans) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	$ 10,976	$ 13,197
Accruing loans 90 days or more past due	0	0
Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	0	0
Commercial & Industrial
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	0	0
Total Commercial
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	0	0
Residential Real Estate
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	10,321	11,981
Home Equity
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	655	1,128
Other
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	0	88
Total Consumer
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	$ 655	$ 1,216

Loans (Interest Income on Nonac

Loans (Interest Income on Nonaccrual Loans) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Interest income on nonaccrual loans	$ 140	$ 81	$ 332	$ 392
Commercial Real Estate
Interest income on nonaccrual loans	0	0	0	0
Commercial & Industrial
Interest income on nonaccrual loans	0	0	0	0
Total Commercial
Interest income on nonaccrual loans	0	0	0	0
Residential Real Estate
Interest income on nonaccrual loans	131	70	288	341
Home Equity
Interest income on nonaccrual loans	9	11	44	51
Other
Interest income on nonaccrual loans	0	0	0	0
Total Consumer
Interest income on nonaccrual loans	$ 9	$ 11	$ 44	$ 51

Loans (Troubled Debt Restructur

Loans (Troubled Debt Restructurings) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2021USD ($)	Sep. 30, 2020USD ($)	Dec. 31, 2020USD ($)
TDRs, Recorded Investment	$ 9,779		$ 9,779		$ 15,763
Specific Reserves on Troubled Debt Restructurings	195		195		159
TDRs, Commitment to Lend	$ 0		$ 0		0
Number of loans modified as a troubled debt restructuring	0	5	0	17
Pre-modifications TDR	$ 0	$ 2,163	$ 0	$ 7,778
Post-modifications TDR	$ 0	$ 2,163	$ 0	$ 7,778
Commercial Real Estate
Number of loans modified as a troubled debt restructuring	0	0	0	1
Pre-modifications TDR	$ 0	$ 0	$ 0	$ 841
Post-modifications TDR	$ 0	$ 0	$ 0	$ 841
Commercial & Industrial
Number of loans modified as a troubled debt restructuring	0	0	0	2
Pre-modifications TDR	$ 0	$ 0	$ 0	$ 460
Post-modifications TDR	$ 0	$ 0	$ 0	$ 460
Total Commercial
Number of loans modified as a troubled debt restructuring	0	0	0	3
Pre-modifications TDR	$ 0	$ 0	$ 0	$ 1,301
Post-modifications TDR	$ 0	$ 0	$ 0	$ 1,301
Residential Real Estate
Number of loans modified as a troubled debt restructuring	0	4	0	10
Pre-modifications TDR	$ 0	$ 2,092	$ 0	$ 5,604
Post-modifications TDR	$ 0	$ 2,092	$ 0	$ 5,604
Home Equity
Number of loans modified as a troubled debt restructuring	0	1	0	4
Pre-modifications TDR	$ 0	$ 71	$ 0	$ 873
Post-modifications TDR	$ 0	$ 71	$ 0	$ 873
Other
Number of loans modified as a troubled debt restructuring	0	0	0	0
Pre-modifications TDR	$ 0	$ 0	$ 0	$ 0
Post-modifications TDR	$ 0	$ 0	$ 0	$ 0
Total Consumer
Number of loans modified as a troubled debt restructuring	0	1	0	4
Pre-modifications TDR	$ 0	$ 71	$ 0	$ 873
Post-modifications TDR	0	$ 71	0	$ 873
Performing Financial Instruments
TDRs, Recorded Investment	8,047		8,047		13,418
Nonperforming Financial Instruments
TDRs, Recorded Investment	$ 1,732		$ 1,732		$ 2,345

Loans (Troubled Debt Restruct_2

Loans (Troubled Debt Restructurings Type of Modification (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Financing Receivable, Troubled Debt Restructuring [Line Items]
Pre-modifications TDR	$ 0	$ 2,163	$ 0	$ 7,778
Below market interest rate concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Pre-modifications TDR	0	0	0	0
Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Pre-modifications TDR	0	2,163	0	7,365
Maturity / amortization concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Pre-modifications TDR	0	0	0	0
Interest only payments
Financing Receivable, Troubled Debt Restructuring [Line Items]
Pre-modifications TDR	0	0	0	0
Combination of concessions
Financing Receivable, Troubled Debt Restructuring [Line Items]
Pre-modifications TDR	$ 0	$ 0	$ 0	$ 413

Loans (Troubled Debt Restruct_3

Loans (Troubled Debt Restructurings Subsequent Default) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021USD ($)loan	Sep. 30, 2020USD ($)loan	Sep. 30, 2021USD ($)loan	Sep. 30, 2020USD ($)loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans modified as a troubled debt restructuring	0	5	0	17
TDR, subsequent default		$ 950		$ 950
Residential Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans modified as a troubled debt restructuring	0	4	0	10
Home Equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans modified as a troubled debt restructuring	0	1	0	4
Payment Default [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans modified as a troubled debt restructuring | loan	1	2	1	2
TDR, subsequent default	$ 330		$ 330
Payment Default [Member] | Residential Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans modified as a troubled debt restructuring | loan	1	1	1	1
TDR, subsequent default	$ 330	$ 903	$ 330	$ 903
Payment Default [Member] | Home Equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans modified as a troubled debt restructuring | loan	0	1	0	1
TDR, subsequent default	$ 0	$ 47	$ 0	$ 47

Loans (Collateral Dependent Ind

Loans (Collateral Dependent Individually Analyzed Loans) (Details) - USD ($) $ in Thousands		Sep. 30, 2021		Dec. 31, 2020
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans	[1]	$ 4,286,404		$ 4,195,990
Collateral Dependent Individually Analyzed
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans		7,725		8,444
Related allowance		859		221
Commercial Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans	[2]	1,661,785		1,633,024
Commercial Real Estate | Collateral Dependent Individually Analyzed
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans		4,009	[3]	1,792
Related allowance		321	[3]	0
Commercial & Industrial
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans	[4]	682,774		817,408
Commercial & Industrial | Collateral Dependent Individually Analyzed
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans		0	[5]	451
Related allowance		0	[5]	0
Total Commercial
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans		2,344,559		2,450,432
Total Commercial | Collateral Dependent Individually Analyzed
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans		4,009		2,243
Related allowance		321		0
Residential Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans	[6]	1,672,364		1,467,312
Residential Real Estate | Collateral Dependent Individually Analyzed
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans		3,716	[7]	5,947
Related allowance		538	[7]	38
Home Equity
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans		249,874		259,185
Home Equity | Collateral Dependent Individually Analyzed
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans		0	[7]	254
Related allowance		0	[7]	183
Other
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans	[8]	19,607		19,061
Other | Collateral Dependent Individually Analyzed
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans		0		0
Related allowance		0		0
Total Consumer
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans		269,481		278,246
Total Consumer | Collateral Dependent Individually Analyzed
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans		0		254
Related allowance		$ 0		$ 183
[1]	Includes net unamortized loan origination costs of $5.0 million and $1.5 million, respectively, at September 30, 2021 and December 31, 2020 and net unamortized premiums on purchased loans of $489 thousand and $787 thousand, respectively, at September 30, 2021 and December 31, 2020.
[2]	Commercial real estate (“CRE”) 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]	Secured by income-producing property.
[4]	Commercial and industrial (“C&I”) consists of loans to businesses and individuals, a portion of which are fully or partially collateralized by real estate. C&I also includes $77.4 million and $199.8 million, respectively, of PPP loans as of September 30, 2021 and December 31, 2020.
[5]	Secured by business assets.
[6]	Residential real estate consists of mortgage and homeowner construction loans secured by one- to four-family residential properties.
[7]	Secured by one- to four-family residential properties.
[8]	Other consists of loans to individuals secured by general aviation aircraft and other personal installment loans.

Loans (Credit Quality Indicator

Loans (Credit Quality Indicators Vintage) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	$ 974,144	$ 1,058,859
Term loans amortized cost, prior year	751,669	734,581
Term loans amortized cost, two years ago	622,902	554,968
Term loans amortized cost, three years ago	452,292	476,043
Term loans amortized cost, four years ago	353,034	325,496
Term loans amortized cost, five years ago or more	809,521	699,479
Revolving loans amortized cost	310,554	330,433
Revolving loans converted to term loans	12,288	16,131
Total	4,286,404	4,195,990
Commercial Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	266,040	285,054
Term loans amortized cost, prior year	255,402	374,110
Term loans amortized cost, two years ago	335,162	300,304
Term loans amortized cost, three years ago	252,887	252,532
Term loans amortized cost, four years ago	195,709	147,808
Term loans amortized cost, five years ago or more	345,476	259,726
Revolving loans amortized cost	8,830	11,104
Revolving loans converted to term loans	2,279	2,386
Total	1,661,785	1,633,024
Commercial Real Estate | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	260,038	283,341
Term loans amortized cost, prior year	250,606	353,875
Term loans amortized cost, two years ago	305,492	260,917
Term loans amortized cost, three years ago	215,877	236,310
Term loans amortized cost, four years ago	179,618	136,490
Term loans amortized cost, five years ago or more	322,267	249,359
Revolving loans amortized cost	8,466	10,333
Revolving loans converted to term loans	2,279	2,386
Total	1,544,643	1,533,011
Commercial Real Estate | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	6,002	756
Term loans amortized cost, prior year	786	20,235
Term loans amortized cost, two years ago	29,670	39,387
Term loans amortized cost, three years ago	37,010	16,222
Term loans amortized cost, four years ago	16,091	11,318
Term loans amortized cost, five years ago or more	23,209	10,367
Revolving loans amortized cost	364	771
Revolving loans converted to term loans	0	0
Total	113,132	99,056
Commercial Real Estate | Classified [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	0	957
Term loans amortized cost, prior year	4,010	0
Term loans amortized cost, two years ago	0	0
Term loans amortized cost, three years ago	0	0
Term loans amortized cost, four years ago	0	0
Term loans amortized cost, five years ago or more	0	0
Revolving loans amortized cost	0	0
Revolving loans converted to term loans	0	0
Total	4,010	957
Commercial & Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	120,412	295,019
Term loans amortized cost, prior year	96,441	96,497
Term loans amortized cost, two years ago	107,294	101,356
Term loans amortized cost, three years ago	95,236	63,631
Term loans amortized cost, four years ago	58,859	47,586
Term loans amortized cost, five years ago or more	115,249	112,344
Revolving loans amortized cost	88,187	99,623
Revolving loans converted to term loans	1,096	1,352
Total	682,774	817,408
Commercial & Industrial | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	120,412	293,493
Term loans amortized cost, prior year	96,441	95,775
Term loans amortized cost, two years ago	106,652	98,146
Term loans amortized cost, three years ago	90,595	56,792
Term loans amortized cost, four years ago	52,440	44,445
Term loans amortized cost, five years ago or more	99,439	91,128
Revolving loans amortized cost	87,001	95,817
Revolving loans converted to term loans	1,096	1,296
Total	654,076	776,892
Commercial & Industrial | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	0	1,123
Term loans amortized cost, prior year	0	722
Term loans amortized cost, two years ago	642	3,210
Term loans amortized cost, three years ago	4,641	6,839
Term loans amortized cost, four years ago	6,419	3,141
Term loans amortized cost, five years ago or more	13,019	14,853
Revolving loans amortized cost	1,186	3,806
Revolving loans converted to term loans	0	56
Total	25,907	33,750
Commercial & Industrial | Classified [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	0	403
Term loans amortized cost, prior year	0	0
Term loans amortized cost, two years ago	0	0
Term loans amortized cost, three years ago	0	0
Term loans amortized cost, four years ago	0	0
Term loans amortized cost, five years ago or more	2,791	6,363
Revolving loans amortized cost	0	0
Revolving loans converted to term loans	0	0
Total	2,791	6,766
Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	573,380	463,715
Term loans amortized cost, prior year	388,586	254,926
Term loans amortized cost, two years ago	174,750	148,149
Term loans amortized cost, three years ago	100,779	156,862
Term loans amortized cost, four years ago	96,557	128,249
Term loans amortized cost, five years ago or more	338,312	315,411
Revolving loans amortized cost	0	0
Revolving loans converted to term loans	0	0
Total	1,672,364	1,467,312
Residential Real Estate | Current [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	573,380	463,477
Term loans amortized cost, prior year	387,179	253,228
Term loans amortized cost, two years ago	174,478	146,839
Term loans amortized cost, three years ago	99,480	155,976
Term loans amortized cost, four years ago	95,794	128,139
Term loans amortized cost, five years ago or more	333,355	309,314
Revolving loans amortized cost	0	0
Revolving loans converted to term loans	0	0
Total	1,663,666	1,456,973
Residential Real Estate | Past Due [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	0	238
Term loans amortized cost, prior year	1,407	1,698
Term loans amortized cost, two years ago	272	1,310
Term loans amortized cost, three years ago	1,299	886
Term loans amortized cost, four years ago	763	110
Term loans amortized cost, five years ago or more	4,957	6,097
Revolving loans amortized cost	0	0
Revolving loans converted to term loans	0	0
Total	8,698	10,339
Home Equity
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	8,170	9,838
Term loans amortized cost, prior year	7,294	6,806
Term loans amortized cost, two years ago	4,315	3,922
Term loans amortized cost, three years ago	2,682	1,474
Term loans amortized cost, four years ago	1,125	1,217
Term loans amortized cost, five years ago or more	4,124	4,141
Revolving loans amortized cost	213,251	219,395
Revolving loans converted to term loans	8,913	12,392
Total	249,874	259,185
Home Equity | Current [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	8,170	9,838
Term loans amortized cost, prior year	7,294	6,771
Term loans amortized cost, two years ago	4,315	3,898
Term loans amortized cost, three years ago	2,682	1,474
Term loans amortized cost, four years ago	1,125	1,217
Term loans amortized cost, five years ago or more	3,939	3,955
Revolving loans amortized cost	213,010	219,085
Revolving loans converted to term loans	8,515	11,280
Total	249,050	257,518
Home Equity | Past Due [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	0	0
Term loans amortized cost, prior year	0	35
Term loans amortized cost, two years ago	0	24
Term loans amortized cost, three years ago	0	0
Term loans amortized cost, four years ago	0	0
Term loans amortized cost, five years ago or more	185	186
Revolving loans amortized cost	241	310
Revolving loans converted to term loans	398	1,112
Total	824	1,667
Other
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	6,142	5,233
Term loans amortized cost, prior year	3,946	2,242
Term loans amortized cost, two years ago	1,381	1,237
Term loans amortized cost, three years ago	708	1,544
Term loans amortized cost, four years ago	784	636
Term loans amortized cost, five years ago or more	6,360	7,857
Revolving loans amortized cost	286	311
Revolving loans converted to term loans	0	1
Total	19,607	19,061
Other | Current [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	6,128	5,214
Term loans amortized cost, prior year	3,936	2,241
Term loans amortized cost, two years ago	1,381	1,237
Term loans amortized cost, three years ago	708	1,544
Term loans amortized cost, four years ago	784	548
Term loans amortized cost, five years ago or more	6,360	7,850
Revolving loans amortized cost	286	308
Revolving loans converted to term loans	0	1
Total	19,583	18,943
Other | Past Due [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	14	19
Term loans amortized cost, prior year	10	1
Term loans amortized cost, two years ago	0	0
Term loans amortized cost, three years ago	0	0
Term loans amortized cost, four years ago	0	88
Term loans amortized cost, five years ago or more	0	7
Revolving loans amortized cost	0	3
Revolving loans converted to term loans	0	0
Total	$ 24	$ 118

Allowance for Credit Losses o_4

Allowance for Credit Losses on Loans (Allowance for Loan Losses Rollforward Analysis) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Jan. 01, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance, Beginning Balance	$ 41,879	$ 41,441	$ 44,106	$ 27,014
Adoption of Topic 326					$ 6,501
Charge-offs	(249)	(111)	(630)	(1,072)
Recoveries	81	15	186	45
Provision	0	1,300	(1,951)	10,157
Allowance, Ending Balance	41,711	42,645	41,711	42,645
Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance, Beginning Balance	21,450	20,283	22,065	14,741
Adoption of Topic 326					3,405
Charge-offs	0	0	0	(172)
Recoveries	0	0	0	0
Provision	(613)	1,474	(1,228)	3,783
Allowance, Ending Balance	20,837	21,757	20,837	21,757
Commercial & Industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance, Beginning Balance	11,717	11,278	12,228	3,921
Adoption of Topic 326					3,029
Charge-offs	2	(2)	(304)	(585)
Recoveries	0	2	3	11
Provision	(392)	(93)	(600)	4,809
Allowance, Ending Balance	11,327	11,185	11,327	11,185
Total Commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance, Beginning Balance	33,167	31,561	34,293	18,662
Adoption of Topic 326					6,434
Charge-offs	2	(2)	(304)	(757)
Recoveries	0	2	3	11
Provision	(1,005)	1,381	(1,828)	8,592
Allowance, Ending Balance	32,164	32,942	32,164	32,942
Residential Real Estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance, Beginning Balance	6,877	8,053	8,042	6,615
Adoption of Topic 326					221
Charge-offs	(57)	(99)	(107)	(99)
Recoveries	5	0	85	0
Provision	1,131	(35)	(64)	1,182
Allowance, Ending Balance	7,956	7,919	7,956	7,919
Home Equity
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance, Beginning Balance	1,340	1,394	1,300	1,390
Adoption of Topic 326					(106)
Charge-offs	(183)	0	(183)	(174)
Recoveries	73	4	79	11
Provision	(112)	(51)	(78)	226
Allowance, Ending Balance	1,118	1,347	1,118	1,347
Other
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance, Beginning Balance	495	433	471	347
Adoption of Topic 326					(48)
Charge-offs	(11)	(10)	(36)	(42)
Recoveries	3	9	19	23
Provision	(14)	5	19	157
Allowance, Ending Balance	473	437	473	437
Total Consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance, Beginning Balance	1,835	1,827	1,771	1,737
Adoption of Topic 326					$ (154)
Charge-offs	(194)	(10)	(219)	(216)
Recoveries	76	13	98	34
Provision	(126)	(46)	(59)	383
Allowance, Ending Balance	$ 1,591	$ 1,784	$ 1,591	$ 1,784

Leases (Narrative) (Details)

Leases (Narrative) (Details) $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2021USD ($)		Sep. 30, 2020USD ($)	Sep. 30, 2021USD ($)		Sep. 30, 2020USD ($)	Dec. 31, 2020USD ($)
Number of operating leases not yet commenced		3			3			0
Operating lease rent expense	[1]	$ 1,014		$ 1,019	$ 3,055		$ 2,956
Options to extend reasonably certain of being exercised					1,400
Short-term operating lease liabilities		3,100			3,100
Operating lease right-of-use assets		27,518			27,518			$ 29,521
Operating lease liabilities		$ 29,810	[2]		$ 29,810	[2]		$ 31,717
[1]	Included in net occupancy expenses in the Unaudited Consolidated Income Statement.
[2]	Includes short-term operating lease liabilities of $3.1 million.

Leases (Schedule of Certain Lea

Leases (Schedule of Certain Lease Terms) (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Weighted average discount rate	3.35%	3.34%
Weighted average remaining lease term	13 years	13 years 4 months 24 days
Minimum [Member]
Lease Expiration Period	10 months	7 months
Range of lease renewal options	1 year	1 year
Maximum [Member]
Lease Expiration Period	19 years	20 years
Range of lease renewal options	5 years	5 years

Leases (Schedule of Operating L

Leases (Schedule of Operating Lease Payments) (Details) - USD ($) $ in Thousands		Sep. 30, 2021		Dec. 31, 2020
Leases [Abstract]
Operating lease minimum payments, Due Current Year		$ 978
Operating lease minimum payments, Due Year Two		3,981
Operating lease minimum payments, Due Year Three		3,881
Operating lease minimum payments, Due Year Four		3,670
Operating lease minimum payments, Due Year Five		2,932
Operating lease minimum payments, Due after Year Five		22,099
Total operating lease payments	[1]	37,541
Interest		7,731
Present value of operating lease liabilities		$ 29,810	[2]	$ 31,717
[1]	Includes $1.4 million related to options to extend lease terms that are reasonably certain of being exercised.
[2]	Includes short-term operating lease liabilities of $3.1 million.

Leases (Lease Cost and Cash Pai

Leases (Lease Cost and Cash Paid) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Leases [Abstract]
Operating lease expense		$ 1,004	$ 1,005	$ 3,011	$ 2,915
Variable lease expense		10	14	44	41
Total lease expense	[1]	1,014	1,019	3,055	2,956
Cash paid reducing operating lease liabilities		$ 932	$ 956	$ 2,910	$ 2,831
[1]	Included in net occupancy expenses in the Unaudited Consolidated Income Statement.

Federal Home Loan Bank Advanc_3

Federal Home Loan Bank Advances (Narrative) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Federal Home Loan Bank, Advances, Branch of FHLBB Bank [Line Items]
Federal Home Loan Bank advances	$ 222,592	$ 593,859
Federal Home Loan Bank of Boston [Member]
Federal Home Loan Bank, Advances, Branch of FHLBB Bank [Line Items]
Federal Home Loan Bank advances	222,592	593,900
Unused line of credit with FHLBB	40,000	40,000
Unused remaining available borrowing capacity with FHLBB	$ 1,500,000	$ 969,700

Federal Home Loan Bank Advanc_4

Federal Home Loan Bank Advances (Federal Home Loan Bank Advances Maturity Schedule) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Federal Home Loan Bank, Advances, Branch of FHLBB Bank [Line Items]
Federal Home Loan Bank advances	$ 222,592	$ 593,859
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	$ 142,450
Weighted average rate for scheduled maturity through the end of the current year	0.39%
Scheduled maturity in year two	$ 0
Weighted average rate for scheduled maturity in year two	0.00%
Scheduled maturity in year three	$ 35,000
Weighted average rate for scheduled maturity in year three	0.45%
Scheduled maturity in year four	$ 35,000
Weighted average rate for scheduled maturity in year four	2.45%
Scheduled maturity in year five	$ 0
Weighted average rate for scheduled maturity in year five	0.00%
Scheduled maturity after year five	$ 10,142
Weighted average rate for scheduled maturity after year five	3.06%
Federal Home Loan Bank advances	$ 222,592	$ 593,900
Total weighted average rate	0.84%

Shareholders' Equity (Narrative

Shareholders' Equity (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Equity Additional Information [Table] [Line Items]
Trust preferred securities included in Tier 1 Capital	$ 22	$ 22
2020 Stock Repurchase Program
Equity Additional Information [Table] [Line Items]
2020 Repurchase Program, number of shares authorized	850,000
2020 Repurchase Program, authorized amount, percentage of common stock	5.00%
Treasury stock, shares acquired	0

Shareholders' Equity (Regulator

Shareholders' Equity (Regulatory Captial Requirements) (Details) $ in Thousands		Sep. 30, 2021USD ($)	Dec. 31, 2020USD ($)
Corporation [Member]
Total Capital (to Risk-Weighted Assets):
Total Capital		$ 569,424	$ 539,496
Total Capital to Risk-Weighted Assets		0.1383	0.1351
Total Capital for Capital Adequacy Purposes		$ 329,407	$ 319,532
Total Capital for Capital Adequacy Purposes to Risk-Weighted Assets		0.0800	0.0800
Tier 1 Capital (to Risk-Weighted Assets):
Tier 1 Capital		$ 535,552	$ 503,791
Tier 1 Capital to Risk Weighted-Assets		0.1301	0.1261
Tier 1 Capital Required For Capital Adequacy Purposes		$ 247,055	$ 239,649
Tier 1 Capital Required for Capital Adequacy Purposes to Risk Weighted-Assets		0.0600	0.0600
Common Equity Tier 1 Capital [Abstract]
Common Equity Tier 1 Capital		$ 513,553	$ 481,792
Common Equity Tier 1 Capital to Risk-Weighted Assets		0.1247	0.1206
Common Equity Tier 1 Capital Required for Capital Adequacy		$ 185,291	$ 179,737
Common Equity Tier 1 Capital for Capital Adequacy Purposes to Risk-Weighted Assets		0.0450	0.0450
Tier 1 Capital (to Average Assets):
Tier 1 Leverage Capital	[1]	$ 535,552	$ 503,791
Tier 1 Leverage Capital to Average Assets	[1]	0.0912	0.0895
Tier 1 Leverage Capital Required for Capital Adequacy Purposes	[1]	$ 234,803	$ 225,209
Tier 1 Leverage Capital Required for Capital Adequacy Purposes to Average Assets	[1]	0.0400	0.0400
Bank [Member]
Total Capital (to Risk-Weighted Assets):
Total Capital		$ 559,605	$ 534,288
Total Capital to Risk-Weighted Assets		0.1359	0.1338
Total Capital for Capital Adequacy Purposes		$ 329,378	$ 319,503
Total Capital for Capital Adequacy Purposes to Risk-Weighted Assets		0.0800	0.0800
Total Capital To Be Well Capitalized		$ 411,723	$ 399,379
Total Capital To Be Well Capitalized to Risk Weighted-Assets		0.1000	0.1000
Tier 1 Capital (to Risk-Weighted Assets):
Tier 1 Capital		$ 525,733	$ 498,583
Tier 1 Capital to Risk Weighted-Assets		0.1277	0.1248
Tier 1 Capital Required For Capital Adequacy Purposes		$ 247,034	$ 239,627
Tier 1 Capital Required for Capital Adequacy Purposes to Risk Weighted-Assets		0.0600	0.0600
Tier 1 Capital Required To Be Well Capitalized		$ 329,378	$ 319,503
Tier 1 Capital Required To Be Well Capitalized to Risk Weighted-Assets		0.0800	0.0800
Common Equity Tier 1 Capital [Abstract]
Common Equity Tier 1 Capital		$ 525,733	$ 498,583
Common Equity Tier 1 Capital to Risk-Weighted Assets		0.1277	0.1248
Common Equity Tier 1 Capital Required for Capital Adequacy		$ 185,275	$ 179,721
Common Equity Tier 1 Capital for Capital Adequacy Purposes to Risk-Weighted Assets		0.0450	0.0450
Common Equity Tier 1 Capital To Be Well Capitalized		$ 267,620	$ 259,596
Common Equity Tier 1 Capital To Be Well Capitalized to Risk-Weighted Assets		0.0650	0.0650
Tier 1 Capital (to Average Assets):
Tier 1 Leverage Capital	[1]	$ 525,733	$ 498,583
Tier 1 Leverage Capital to Average Assets	[1]	0.0896	0.0886
Tier 1 Leverage Capital Required for Capital Adequacy Purposes	[1]	$ 234,722	$ 225,126
Tier 1 Leverage Capital Required for Capital Adequacy Purposes to Average Assets	[1]	0.0400	0.0400
Tier 1 Leverage Capital Required To Be Well Capitalized	[1]	$ 293,403	$ 281,407
Tier 1 Leverage Capital Required To Be Well Capitalized to Average Assets	[1]	0.0500	0.0500
[1]	Leverage ratio.

Derivative Financial Instrume_3

Derivative Financial Instruments (Narrative) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Interest rate swaps [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	$ 360,000	$ 60,000
Interest rate swaps with customers [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	998,530	991,002
Mirror swaps with counterparties [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	998,530	991,002
Risk participation-in agreement [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	147,404	92,717
Interest rate lock commitments [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	97,856	167,671
Forward sale commitments [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	195,105	279,653
Derivatives Designated as Cash Flow Hedging Instruments [Member] | Interest rate swaps [Member] | Commercial Loan
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	300,000
Derivatives Designated as Cash Flow Hedging Instruments [Member] | Interest rate swaps [Member] | Federal Home Loan Bank Advances
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	60,000	60,000
Not Designated as Hedging Instrument [Member] | Interest rate swaps with customers [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	998,500	991,000
Not Designated as Hedging Instrument [Member] | Mirror swaps with counterparties [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	998,500	991,000
Not Designated as Hedging Instrument [Member] | Risk participation-out agreement [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	74,600	61,600
Not Designated as Hedging Instrument [Member] | Risk participation-in agreement [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	$ 147,400	$ 92,700

Derivative Financial Instrume_4

Derivative Financial Instruments (Fair Value of Derivatives by Balance Sheet Location) (Details) - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020
Derivative Financial Instruments, Assets [Member]
Derivatives, Fair Value [Line Items]
Gross derivative asset positions		$ 47,750	$ 83,095
Amounts offset in balance sheet	[1]	1,828	67
Net amounts presented in balance sheet		45,922	83,028
Collateral pledged	[2]	0	0
Net amounts		45,922	83,028
Derivative Financial Instruments, Liabilities [Member]
Derivatives, Fair Value [Line Items]
Gross derivative liability positions		47,695	81,190
Amounts offset in balance sheet	[1]	1,828	67
Net amounts presented in balance sheet		45,867	81,123
Collateral pledged	[2]	39,109	74,698
Net amounts		6,758	6,425
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		180	0
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		2,006	1,958
Not Designated as Hedging Instrument [Member] | Interest rate swaps with customers [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets not designated		42,873	75,804
Not Designated as Hedging Instrument [Member] | Interest rate swaps with customers [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities not designated		1,667	68
Not Designated as Hedging Instrument [Member] | Mirror swaps with counterparties [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets not designated		1,649	67
Not Designated as Hedging Instrument [Member] | Mirror swaps with counterparties [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities not designated		42,996	76,248
Not Designated as Hedging Instrument [Member] | Risk participation agreements [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets not designated		1	22
Not Designated as Hedging Instrument [Member] | Risk participation agreements [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities not designated		2	2
Not Designated as Hedging Instrument [Member] | Interest rate lock commitments [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets not designated		2,344	7,202
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		703	0
Not Designated as Hedging Instrument [Member] | Forward sale commitments [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities not designated		$ 1,024	$ 2,914
[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		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Net change in fair value of cash flow hedges, net of tax	$ (403)	$ 154	$ (36)	$ (888)
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, net of tax	(403)	214	(36)	(1,109)
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, net of tax	0	25	0	71
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, net of tax	$ 0	$ (85)	$ 0	$ 150

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		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	$ 350	$ (4,978)	$ 2,505	$ (1,130)
Interest rate swaps with customers [Member] | Loan related derivative income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	(2,715)	767	(21,281)	67,258
Mirror swaps with counterparties [Member] | Loan related derivative income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	3,558	499	23,173	(63,655)
Risk participation agreements [Member] | Loan related derivative income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	(115)	(2)	478	215
Interest rate lock commitments [Member] | Mortgage banking revenues [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	(17)	(1,499)	(4,859)	5,785
Forward sale commitments [Member] | Mortgage banking revenues [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	$ (361)	$ (4,743)	$ 4,994	$ (10,733)

Fair Value Measurements (Fair V

Fair Value Measurements (Fair Value Mortgage Loans Held For Sale Disclosures) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Mortgage loans held for sale, measured at fair value	$ 48,705		$ 48,705		$ 61,614
Mortgage loans held for sale, amortized cost	47,464		47,464		59,313
Mortgage loans held for sale, difference between fair value and amortized cost	1,241		1,241		$ 2,301
Mortgage Loans Held for Sale [Member]
Change in fair value under fair value option election	$ 372	$ 1,100	$ (1,100)	$ 2,200

Fair Value Measurements (Assets

Fair Value Measurements (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, fair value	$ 1,045,833	$ 894,571
Mortgage loans held for sale, measured at fair value	48,705	61,614
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, fair value	178,605	131,669
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, fair value	843,702	740,305
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, fair value	11,156	12,669
Corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, fair value	12,370	9,928
Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale, measured at fair value	48,705	61,614
Derivative assets	45,922	83,028
Total assets at fair value on a recurring basis	1,140,460	1,039,213
Derivative liabilities	45,867	81,123
Total liabilities at fair value on a recurring basis	45,867	81,123
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, fair value	178,605	131,669
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, fair value	843,702	740,305
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, fair value	11,156	12,669
Recurring [Member] | Corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, fair value	12,370	9,928
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, 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, 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, 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, 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	48,705	61,614
Derivative assets	45,922	83,028
Total assets at fair value on a recurring basis	1,140,460	1,039,213
Derivative liabilities	45,867	81,123
Total liabilities at fair value on a recurring basis	45,867	81,123
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, fair value	178,605	131,669
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, fair value	843,702	740,305
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, fair value	11,156	12,669
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, fair value	12,370	9,928
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, 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, 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, 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, fair value	0	0
Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value on a recurring basis	3,563	9,154
Loan servicing rights		7,434
Nonrecurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value on a recurring basis	0	0
Loan servicing rights		0
Nonrecurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value on a recurring basis	0	0
Loan servicing rights		0
Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value on a recurring basis	$ 3,563	9,154
Loan servicing rights		$ 7,434

Fair Value Measurements (Asset

Fair Value Measurements (Asset and Liabilities Measured on a Nonrecurring Basis) (Details) - Nonrecurring [Member] - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent individually analyzed loans	$ 3,563	$ 1,720
Loan servicing rights		7,434
Total assets at fair value on a nonrecurring basis	3,563	9,154
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent individually analyzed loans	0	0
Loan servicing rights		0
Total assets at fair value on a nonrecurring basis	0	0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent individually analyzed loans	0	0
Loan servicing rights		0
Total assets at fair value on a nonrecurring basis	0	0
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent individually analyzed loans	3,563	1,720
Loan servicing rights		7,434
Total assets at fair value on a nonrecurring basis	$ 3,563	$ 9,154

Fair Value Measurements (Qualit

Fair Value Measurements (Qualitative Information About Level 3 Assets Measured at Fair Value on a Nonrecurring Basis) (Details) - Nonrecurring [Member] - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Collateral dependent individually analyzed loans	$ 3,563	$ 1,720
Loan servicing rights		7,434
Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Collateral dependent individually analyzed loans	$ 3,563	1,720
Loan servicing rights		$ 7,434
Minimum [Member] | Collateral Dependent Individually Analyzed Loans [Member] | Appraisals Of Collateral [Member] | Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Discount for costs to sell	0.00%	0.00%
Appraisal adjustments	0.00%	0.00%
Minimum [Member] | Loan Servicing Rights [Member] | Valuation Technique, Discounted Cash Flow [Member] | Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Discount rates		10.00%
Prepayment rates		18.00%
Maximum [Member] | Collateral Dependent Individually Analyzed Loans [Member] | Appraisals Of Collateral [Member] | Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Discount for costs to sell	14.00%	25.00%
Appraisal adjustments	100.00%	100.00%
Maximum [Member] | Loan Servicing Rights [Member] | Valuation Technique, Discounted Cash Flow [Member] | Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Discount rates		14.00%
Prepayment rates		42.00%
Weighted Average [Member] | Collateral Dependent Individually Analyzed Loans [Member] | Appraisals Of Collateral [Member] | Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Discount for costs to sell	11.00%	11.00%
Appraisal adjustments	15.00%	15.00%
Weighted Average [Member] | Loan Servicing Rights [Member] | Valuation Technique, Discounted Cash Flow [Member] | Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Discount rates		10.00%
Prepayment rates		21.00%

Fair Value Measurements (Carryi

Fair Value Measurements (Carrying Amounts and Estimated Fair Values of Financial Instruments) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans, net of allowance for credit losses on loans	$ 4,244,693	$ 4,151,884
Federal Home Loan Bank advances	222,592	593,859
Junior subordinated debentures	22,681	22,681
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans, net of allowance for credit losses on loans	4,244,693	4,151,884
Time deposits	1,464,284	1,296,396
Federal Home Loan Bank advances	222,592	593,859
Junior subordinated debentures	22,681	22,681
Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans, net of allowance for credit losses on loans	4,174,632	4,114,628
Time deposits	1,468,196	1,302,128
Federal Home Loan Bank advances	225,069	602,000
Junior subordinated debentures	20,136	19,422
Fair Value Measurement [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans, net of allowance for credit losses on loans	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]
Loans, net of allowance for credit losses on loans	0	0
Time deposits	1,468,196	1,302,128
Federal Home Loan Bank advances	225,069	602,000
Junior subordinated debentures	20,136	19,422
Fair Value Measurement [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans, net of allowance for credit losses on loans	4,174,632	4,114,628
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 Millions	Sep. 30, 2021	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Receivables from contracts with customers	$ 4.8	$ 4.8
Contract cost assets	$ 1.6	$ 1.5

Revenue from Contracts with C_4

Revenue from Contracts with Customers (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Net interest income	[1]	$ 36,070	$ 31,654	$ 103,695	$ 95,201
Asset-based wealth management revenues	[1]	10,224	8,786	29,798	25,297
Transaction-based wealth management revenues	[1]	231	168	980	951
Wealth management revenues	[1]	10,455	8,954	30,778	26,248
Mortgage banking revenues	[1]	6,373	12,353	24,294	33,300
Card interchange fees	[1]	1,265	1,161	3,714	3,139
Service charges on deposit accounts	[1]	673	598	1,917	1,975
Loan related derivative income	[1]	728	1,264	2,370	3,818
Income from bank-owned life insurance	[1]	618	567	1,781	1,922
Other income	[1]	408	571	2,233	1,313
Total noninterest income	[1]	20,520	25,468	67,087	71,715
Total revenues	[1]	56,590	57,122	170,782	166,916
Revenue from contracts in scope of Topic 606		12,703	11,204	38,243	32,388
Net Interest Income
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	[2]	0	0	0	0
Asset-based Wealth Management Revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	[2]	10,224	8,786	29,798	25,297
Transaction-based Wealth Management Revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	[2]	231	168	980	951
Total Wealth Management Revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	[2]	10,455	8,954	30,778	26,248
Mortgage Banking Revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	[2]	0	0	0	0
Card Interchange Fees
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	[2]	1,265	1,161	3,714	3,139
Service Charges on Deposit Accounts
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	[2]	673	598	1,917	1,975
Loan Related Derivative Income
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	[2]	0	0	0	0
Income From Bank-owned Life Insurance
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	[2]	0	0	0	0
Other Income
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	[2]	310	491	1,834	1,026
Total Noninterest Income
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	[2]	12,703	11,204	38,243	32,388
Total Revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	[2]	$ 12,703	$ 11,204	$ 38,243	$ 32,388
[1]	As reported in the Consolidated Statements of Income.
[2]	Revenue from contracts with customers in scope of ASC 606.

Revenue from Contracts with C_5

Revenue from Contracts with Customers (Disaggregation by Timing of Revenue Recognition) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue from contracts in scope of Topic 606		$ 12,703	$ 11,204	$ 38,243	$ 32,388
Wealth Management Revenues
Revenue from contracts in scope of Topic 606	[1]	10,455	8,954	30,778	26,248
Wealth Management Revenues | Transferred over Time [Member]
Revenue from contracts in scope of Topic 606		10,455	8,954	30,778	26,248
Card Interchange Fees
Revenue from contracts in scope of Topic 606	[1]	1,265	1,161	3,714	3,139
Card Interchange Fees | Transferred at Point in Time [Member]
Revenue from contracts in scope of Topic 606		1,265	1,161	3,714	3,139
Service Charges on Deposit Accounts
Revenue from contracts in scope of Topic 606	[1]	673	598	1,917	1,975
Service Charges on Deposit Accounts | Transferred at Point in Time [Member]
Revenue from contracts in scope of Topic 606		531	447	1,516	1,488
Service Charges on Deposit Accounts | Transferred over Time [Member]
Revenue from contracts in scope of Topic 606		142	151	401	487
Other Income
Revenue from contracts in scope of Topic 606	[1]	310	491	1,834	1,026
Other Income | Transferred at Point in Time [Member]
Revenue from contracts in scope of Topic 606		247	441	1,678	895
Other Income | Transferred over Time [Member]
Revenue from contracts in scope of Topic 606		$ 63	$ 50	$ 156	$ 131
[1]	Revenue from contracts with customers in scope of ASC 606.

Defined Benefit Pension Plans_2

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

Defined Benefit Pension Plans_3

Defined Benefit Pension Plans (Components of Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Qualified Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	[1]	$ 592	$ 541	$ 1,777	$ 1,623
Interest cost	[2]	500	626	1,502	1,879
Expected return on plan assets	[2]	(1,203)	(1,135)	(3,611)	(3,404)
Recognized net actuarial loss	[2]	531	396	1,591	1,187
Net periodic benefit cost		420	428	1,259	1,285
Non-Qualified Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	[1]	52	43	156	128
Interest cost	[2]	84	116	253	349
Expected return on plan assets	[2]	0	0	0	0
Recognized net actuarial loss	[2]	180	139	542	419
Net periodic benefit cost		$ 316	$ 298	$ 951	$ 896
[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)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
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	2.71%	3.42%
Equivalent single discount rate for service cost	2.86%	3.54%
Equivalent single discount rate for interest cost	2.16%	3.07%
Expected long-term return on plan assets	5.75%	5.75%
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	2.51%	3.30%
Equivalent single discount rate for service cost	2.94%	3.62%
Equivalent single discount rate for interest cost	1.97%	2.93%
Rate of compensation increase	3.75%	3.75%

Share-Based Compensation (Narra

Share-Based Compensation (Narrative) (Details)	9 Months Ended
	Sep. 30, 2021$ / sharesshares
Performance Based Nonvested Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Performance share awards, grant date fair value | $ / shares	$ 46.15
Performance share awards, shares vesting | shares	51,156
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	8,360
Nonvested share units weighted average grant date fair value | $ / shares	$ 50.81

Business Segments (Statement of

Business Segments (Statement of Operations and Total Assets by Reportable Segment) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Net interest income (expense)	[1]	$ 36,070	$ 31,654	$ 103,695	$ 95,201
Provision for credit losses		0	1,325	(2,000)	10,561
Interest Income (Expense), after Provision for Loan Loss		36,070	30,329	105,695	84,640
Noninterest income	[1]	20,520	25,468	67,087	71,715
Depreciation and amortization expense		1,105	989	3,223	3,006
Other noninterest expenses related to segments		31,415	31,355	97,022	88,269
Noninterest Expense		32,520	32,344	100,245	91,275
Income (loss) before income taxes		24,070	23,453	72,537	65,080
Income tax expense		5,319	5,131	15,855	13,817
Net Income (Loss) Attributable to Parent		18,751	18,322	56,682	51,263
Total assets		6,002,643	5,849,792	6,002,643	5,849,792	$ 5,713,169
Expenditures for long-lived assets		338	406	2,166	1,331
Commercial Banking [Member]
Segment Reporting Information [Line Items]
Net interest income (expense)		35,732	33,103	105,579	94,692
Provision for credit losses		0	1,325	(2,000)	10,561
Interest Income (Expense), after Provision for Loan Loss		35,732	31,778	107,579	84,131
Noninterest income		9,440	15,940	33,510	43,515
Depreciation and amortization expense		718	601	2,040	1,832
Other noninterest expenses related to segments		20,108	20,273	60,093	56,571
Noninterest Expense		20,826	20,874	62,133	58,403
Income (loss) before income taxes		24,346	26,844	78,956	69,243
Income tax expense		5,394	5,828	17,275	14,769
Net Income (Loss) Attributable to Parent		18,952	21,016	61,681	54,474
Total assets		4,520,169	4,588,419	4,520,169	4,588,419
Expenditures for long-lived assets		309	360	2,026	1,147
Wealth Management Services [Member]
Segment Reporting Information [Line Items]
Net interest income (expense)		(25)	(24)	(72)	(117)
Provision for credit losses		0	0	0	0
Interest Income (Expense), after Provision for Loan Loss		(25)	(24)	(72)	(117)
Noninterest income		10,455	8,954	31,778	26,248
Depreciation and amortization expense		341	350	1,044	1,058
Other noninterest expenses related to segments		7,190	7,178	20,594	20,408
Noninterest Expense		7,531	7,528	21,638	21,466
Income (loss) before income taxes		2,899	1,402	10,068	4,665
Income tax expense		710	403	2,412	1,216
Net Income (Loss) Attributable to Parent		2,189	999	7,656	3,449
Total assets		75,438	74,942	75,438	74,942
Expenditures for long-lived assets		13	20	87	86
Corporate [Member]
Segment Reporting Information [Line Items]
Net interest income (expense)		363	(1,425)	(1,812)	626
Provision for credit losses		0	0	0	0
Interest Income (Expense), after Provision for Loan Loss		363	(1,425)	(1,812)	626
Noninterest income		625	574	1,799	1,952
Depreciation and amortization expense		46	38	139	116
Other noninterest expenses related to segments		4,117	3,904	16,335	11,290
Noninterest Expense		4,163	3,942	16,474	11,406
Income (loss) before income taxes		(3,175)	(4,793)	(16,487)	(8,828)
Income tax expense		(785)	(1,100)	(3,832)	(2,168)
Net Income (Loss) Attributable to Parent		(2,390)	(3,693)	(12,655)	(6,660)
Total assets		1,407,036	1,186,431	1,407,036	1,186,431
Expenditures for long-lived assets		$ 16	$ 26	$ 53	$ 98
[1]	As reported in the Consolidated Statements of Income.

Other Comprehensive Income (L_3

Other Comprehensive Income (Loss) (Activity in Other Comprehensive Income) (Details) - USD ($) $ in Thousands		3 Months Ended				9 Months Ended
		Sep. 30, 2021		Sep. 30, 2020		Sep. 30, 2021		Sep. 30, 2020
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Changes in fair value of available for sale debt securities, before tax		$ (4,127)		$ (4,582)		$ (16,212)		$ 9,794
Changes in fair value of available for sale debt securities, tax		(990)		(1,077)		(3,890)		2,301
Changes in fair value of available for sale debt securities, net of tax		(3,137)		(3,505)		(12,322)		7,493
Changes in fair value of cash flow hedges, before tax		(288)		(146)		(21)		(1,994)
Changes in fair value of cash flow hedges, tax		(69)		(39)		(5)		(473)
Change in fair value of cash flow hedges , net of tax		(219)		(107)		(16)		(1,521)
Net cash flow hedge gains (losses) reclassified into earnings, before tax		(243)	[1]	344	[2]	(27)	[1]	829	[2]
Net cash flow hedge gains (losses) reclassified into earnings, tax		(59)	[1]	83	[2]	(7)	[1]	196	[2]
Net cash flow hedge gains (losses) reclassified into earnings, net of tax		(184)	[1]	261	[2]	(20)	[1]	633	[2]
Net change in fair value of cash flow hedges, before tax		(531)		198		(48)		(1,165)
Net change in fair value of cash flow hedges, tax		(128)		44		(12)		(277)
Net change in fair value of cash flow hedges, net of tax		(403)		154		(36)		(888)
Amortization of net actuarial losses, before tax	[3]	711		535		2,133		1,606
Amortization of net actuarial losses, tax	[3]	171		125		512		377
Amortization of net actuarial losses, net of tax	[3]	540		410		1,621		1,229
Total other comprehensive income (loss), before tax		(3,947)		(3,849)		(14,127)		10,235
Total other comprehensive income (loss), tax		(947)		(908)		(3,390)		2,401
Total other comprehensive income (loss), net of tax		$ (3,000)		$ (2,941)		$ (10,737)		$ 7,834
[1]	The pre-tax amounts for the three months ended September 30, 2021 are included in interest expense on FHLB advances and interest and fees on loans in the Unaudited Consolidated Statements of Income.
[2]	The pre-tax amounts for the three months ended September 30, 2020 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		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Accumulated other comprehensive income (loss), beginning balance			$ (7,391)
Total other comprehensive income (loss), net of tax	$ (3,000)	$ (2,941)	(10,737)	$ 7,834
Accumulated other comprehensive income (loss), ending balance	(18,128)		(18,128)
Net Unrealized Gains (Losses) on AFS Securities [Member]
Accumulated other comprehensive income (loss), beginning balance	696	14,224	9,881	3,226
Other comprehensive income (loss) before reclassifications	(3,137)	(3,505)	(12,322)	7,493
Amounts reclassed from accumulated other comprehensive income (loss)	0	0	0	0
Total other comprehensive income (loss), net of tax	(3,137)	(3,505)	(12,322)	7,493
Accumulated other comprehensive income (loss), ending balance	(2,441)	10,719	(2,441)	10,719
Net Unrealized Losses on Cash Flow Hedges [Member]
Accumulated other comprehensive income (loss), beginning balance	(1,080)	(1,835)	(1,447)	(793)
Other comprehensive income (loss) before reclassifications	(219)	(107)	(16)	(1,521)
Amounts reclassed from accumulated other comprehensive income (loss)	(184)	261	(20)	633
Total other comprehensive income (loss), net of tax	(403)	154	(36)	(888)
Accumulated other comprehensive income (loss), ending balance	(1,483)	(1,681)	(1,483)	(1,681)
Pension Benefit Adjustment [Member]
Accumulated other comprehensive income (loss), beginning balance	(14,744)	(12,851)	(15,825)	(13,670)
Other comprehensive income (loss) before reclassifications	0	0	0	0
Amounts reclassed from accumulated other comprehensive income (loss)	540	410	1,621	1,229
Total other comprehensive income (loss), net of tax	540	410	1,621	1,229
Accumulated other comprehensive income (loss), ending balance	(14,204)	(12,441)	(14,204)	(12,441)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated other comprehensive income (loss), beginning balance	(15,128)	(462)	(7,391)	(11,237)
Other comprehensive income (loss) before reclassifications	(3,356)	(3,612)	(12,338)	5,972
Amounts reclassed from accumulated other comprehensive income (loss)	356	671	1,601	1,862
Total other comprehensive income (loss), net of tax	(3,000)	(2,941)	(10,737)	7,834
Accumulated other comprehensive income (loss), ending balance	$ (18,128)	$ (3,403)	$ (18,128)	$ (3,403)

Earnings Per Common Share (Calc

Earnings Per Common Share (Calculation of Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Net income	$ 18,751	$ 18,322	$ 56,682	$ 51,263
Less dividends and undistributed earnings allocated to participating securities	(55)	(37)	(163)	(109)
Net income available to common shareholders	$ 18,696	$ 18,285	$ 56,519	$ 51,154
Weighted average common shares outstanding - basic	17,320,000	17,260,000	17,303,000	17,287,000
Basic earnings per common share	$ 1.08	$ 1.06	$ 3.27	$ 2.96
Less dividends and undistributed earnings allocated to participating securities	$ (54)	$ (37)	$ (162)	$ (109)
Net income available to common shareholders	$ 18,697	$ 18,285	$ 56,520	$ 51,154
Dilutive effect of common stock equivalents	124,000	57,000	148,000	82,000
Weighted average common shares outstanding - diluted	17,444,000	17,317,000	17,451,000	17,369,000
Diluted earnings per common share	$ 1.07	$ 1.06	$ 3.24	$ 2.95
Antidilutive common stock equivalents	148,542	223,210	149,675	221,047

Commitments and Contingencies_2

Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Commitments to extend credit on standby letters of credit [Member] | Commitments to extend credit [Member]
Commitments and Contingencies Disclosure [Line Items]
Contract amount	$ 12,146	$ 11,709

Commitments and Contingencies_3

Commitments and Contingencies (Financial Instruments with Off Balance Sheet Risk) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Interest rate lock commitments [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	$ 97,856	$ 167,671
Forward sale commitments [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	195,105	279,653
Interest rate swaps with customers [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	998,530	991,002
Mirror swaps with counterparties [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	998,530	991,002
Risk participation-in agreement [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	147,404	92,717
Interest rate swaps [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	360,000	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	483,296	453,493
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	352,999	319,744
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	125,949	89,078
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	$ 12,146	$ 11,709

Commitments and Contingencies_4

Commitments and Contingencies (ACL on Unfunded Commitments Rollforward) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Jan. 01, 2020
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	$ 2,333,000	$ 2,155,000	$ 2,382,000	$ 293,000
Adoption of Topic 326					$ 1,483,000
Provision	0	25,000	(49,000)	404,000
Ending balance	2,333,000	2,180,000	2,333,000	2,180,000
Commercial Real Estate
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	1,214,000	887,000	907,000	136,000
Adoption of Topic 326					817,000
Provision	4,000	(30,000)	311,000	(96,000)
Ending balance	1,218,000	857,000	1,218,000	857,000
Commercial & Industrial
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	1,045,000	1,207,000	1,402,000	144,000
Adoption of Topic 326					626,000
Provision	(8,000)	60,000	(365,000)	497,000
Ending balance	1,037,000	1,267,000	1,037,000	1,267,000
Total Commercial
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	2,259,000	2,094,000	2,309,000	280,000
Adoption of Topic 326					1,443,000
Provision	(4,000)	30,000	(54,000)	401,000
Ending balance	2,255,000	2,124,000	2,255,000	2,124,000
Residential Real Estate
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	56,000	42,000	54,000	6,000
Adoption of Topic 326					34,000
Provision	4,000	(5,000)	6,000	(3,000)
Ending balance	60,000	37,000	60,000	37,000
Home Equity
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	0	0	0	0
Adoption of Topic 326					0
Provision	0	0	0	0
Ending balance	0	0	0	0
Other
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	18,000	19,000	19,000	7,000
Adoption of Topic 326					6,000
Provision	0	0	(1,000)	6,000
Ending balance	18,000	19,000	18,000	19,000
Total Consumer
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	18,000	19,000	19,000	7,000
Adoption of Topic 326					$ 6,000
Provision	0	0	(1,000)	6,000
Ending balance	$ 18,000	$ 19,000	$ 18,000	$ 19,000