Washington Trust Bancorp (WASH) 10-Q 6 May 21 2021 Q1 Quarterly report Financial data

Cover Page

Cover Page - shares	3 Months Ended
	Mar. 31, 2021	Apr. 30, 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	Large Accelerated Filer
Document Type	10-Q
Entity File Number	001-32991
City Area Code	401
Local Phone Number	348-1200
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Document Period End Date	Mar. 31, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
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		17,311,312
Entity Tax Identification Number	05-0404671
Entity Address, Postal Zip Code	02891

CONSOLIDATED BALANCE SHEETS (Un

CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands		Mar. 31, 2021		Dec. 31, 2020
Assets:
Cash and due from banks		$ 166,960		$ 194,143
Short-term investments		3,783		8,125
Mortgage loans held for sale, at fair value		77,450		61,614
Available for sale debt securities, at fair value		948,094		894,571
Federal Home Loan Bank stock, at cost		24,772		30,285
Loans:
Total loans	[1]	4,194,666		4,195,990
Less: allowance for credit losses on loans		42,137		44,106
Net loans		4,152,529		4,151,884
Premises and equipment, net		28,953		28,870
Operating lease right-of-use assets		28,761		29,521
Investment in bank-owned life insurance		84,749		84,193
Goodwill		63,909		63,909
Identifiable intangible assets, net		6,079		6,305
Other assets		133,350		159,749
Total assets		5,719,389		5,713,169
Liabilities:
Noninterest-bearing deposits		932,999		832,287
Interest-bearing deposits		3,616,143		3,546,066
Total deposits		4,549,142		4,378,353
Federal Home Loan Bank advances		466,912		593,859
Junior subordinated debentures		22,681		22,681
Operating lease liabilities		30,974	[2]	31,717
Other liabilities		116,081		152,364
Total liabilities		5,185,790		5,178,974
Commitments and contingencies (Note 18)
Shareholders' Equity:
Common stock		1,085		1,085
Paid-in capital		124,882		125,610
Retained earnings		429,598		418,246
Accumulated other comprehensive income (loss)		(20,006)		(7,391)
Treasury stock, at cost		(1,960)		(3,355)
Total shareholders' equity		533,599		534,195
Total liabilities and shareholders’ equity		$ 5,719,389		$ 5,713,169
[1]	Includes net unamortized loan origination fees of $223 thousand at March 31, 2021 and net unamortized loan origination costs of $1.5 million, at December 31, 2020 and net unamortized premiums on purchased loans of $653 thousand and $787 thousand, respectively, at March 31, 2021 and December 31, 2020.
[2]	Includes short-term operating lease liabilities of $2.9 million.

CONSOLIDATED BALANCE SHEETS (_2

CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Available for sale debt securities amortized cost basis	$ 952,618	$ 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	17,306,129	17,265,337
Treasury stock, shares	57,328	98,120

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Interest income:
Interest and fees on loans		$ 34,159	$ 40,008
Interest on mortgage loans held for sale		441	285
Taxable interest on debt securities		3,242	5,834
Dividends on Federal Home Loan Bank stock		133	640
Other interest income		33	349
Total interest and dividend income		38,008	47,116
Interest expense:
Deposits		3,663	8,536
Federal Home Loan Bank advances		1,380	5,765
Junior subordinated debentures		94	213
Total interest expense		5,137	14,514
Net interest income	[1]	32,871	32,602
Provision for credit losses		(2,000)	7,036
Net interest income after provision for credit losses		34,871	25,566
Noninterest income:
Wealth management revenues	[1]	9,895	8,689
Mortgage banking revenues	[1]	11,927	6,096
Card interchange fees	[1]	1,133	947
Service charges on deposit accounts	[1]	609	860
Loan related derivative income	[1]	467	2,455
Income from bank-owned life insurance	[1]	556	564
Other income	[1]	1,387	316
Total noninterest income	[1]	25,974	19,927
Noninterest expense:
Salaries and employee benefits		21,527	19,468
Outsourced services		3,200	3,000
Net occupancy		2,128	2,019
Equipment		994	977
Legal, audit and professional fees		597	822
FDIC deposit insurance costs		345	422
Advertising and promotion		222	259
Amortization of intangibles		226	230
Debt prepayment penalties		3,335	0
Other expenses		2,139	3,256
Total noninterest expense		34,713	30,453
Income before income taxes		26,132	15,040
Income tax expense		5,661	3,139
Net income		20,471	11,901
Net income available to common shareholders		$ 20,415	$ 11,869
Weighted average common shares outstanding - basic		17,275	17,345
Weighted average common shares outstanding - diluted		17,431	17,441
Per share information:
Basic earnings per common share		$ 1.18	$ 0.68
Diluted earnings per common share		$ 1.17	$ 0.68
[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
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 20,471	$ 11,901
Other comprehensive income (loss), net of tax:
Net change in fair value of available for sale debt securities	(13,319)	12,806
Net change in fair value of cash flow hedges	297	(1,050)
Net change in defined benefit plan obligations	407	410
Total other comprehensive income (loss), net of tax	(12,615)	12,166
Total comprehensive income	$ 7,856	$ 24,067

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock [Member]	Paid-in Capital [Member]	Retained Earnings [Member]	Retained Earnings [Member]Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]
Common Stock, Shares Outstanding, Beginning Balance at Dec. 31, 2019			17,363,000
Shareholders' Equity, Beginning Balance at Dec. 31, 2019	$ 503,492		$ 1,085	$ 123,281	$ 390,363		$ (11,237)	$ 0
Net income	11,901				11,901
Total other comprehensive income (loss), net of tax	12,166						12,166
Cash dividends declared	(8,913)				(8,913)
Share-based compensation	758			758
Exercise of stock options and issuance of other compensation-related equity awards, shares			14,000
Exercise of stock options and issuance of other compensation-related equity awards, value	(377)		$ 0	(872)				495
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, Ending Balance at Mar. 31, 2020			17,252,000
Shareholders' Equity, Ending Balance at Mar. 31, 2020	$ 508,597		$ 1,085	123,167	387,243		929	(3,827)
Shareholders' Equity, Ending Balance (Accounting Standards Update 2016-13) at Mar. 31, 2020		$ (6,108)				$ (6,108)
Common Stock, Shares Outstanding, Beginning Balance at Dec. 31, 2020	17,265,337		17,265,000
Shareholders' Equity, Beginning Balance at Dec. 31, 2020	$ 534,195		$ 1,085	125,610	418,246		(7,391)	(3,355)
Net income	20,471				20,471
Total other comprehensive income (loss), net of tax	(12,615)						(12,615)
Cash dividends declared	(9,119)				(9,119)
Share-based compensation	918			918
Exercise of stock options and issuance of other compensation-related equity awards, shares			41,000
Exercise of stock options and issuance of other compensation-related equity awards, value	$ (251)		$ 0	(1,646)				1,395
Common Stock, Shares Outstanding, Ending Balance at Mar. 31, 2021	17,306,129		17,306,000
Shareholders' Equity, Ending Balance at Mar. 31, 2021	$ 533,599		$ 1,085	$ 124,882	$ 429,598		$ (20,006)	$ (1,960)

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Stockholders' Equity [Abstract]
Cash dividends declared per share	$ 0.52	$ 0.51

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net income		$ 20,471	$ 11,901
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses		(2,000)	7,036
Depreciation of premises and equipment		828	783
Net amortization of premium and discount on securities and loans		882	1,519
Amortization of intangibles		226	230
Share-based compensation		918	758
Tax benefit (expense) from stock option exercises and other equity awards		9	(85)
Income from bank-owned life insurance	[1]	(556)	(564)
Net gains on loan sales, including fair value adjustments		(11,858)	(6,013)
Proceeds from sales of loans		291,789	148,768
Loans originated for sale		(299,051)	(166,408)
(Increase) decrease in operating lease right-of-use assets		760	694
Increase (decrease) in operating lease liabilities		(744)	(677)
(Increase) decrease in other assets		30,504	(57,060)
Increase (decrease) in other liabilities		(35,544)	56,292
Net cash provided by (used in) operating activities		(3,366)	(2,826)
Cash flows from investing activities:
Purchases of mortgage-backed securities available for sale		(130,496)	(70,924)
Purchases of other investment securities available for sale		(77,528)	(45,000)
Maturities and principal payments of mortgage-backed securities available for sale		114,653	43,750
Maturities and principal payments of other investment securities available for sale		20,000	70,000
Net redemption (purchases) of Federal Home Loan Bank stock		5,513	(2,723)
Net (increase) decrease in loans		7,570	(145,740)
Purchases of loans		(1,539)	(51,081)
Proceeds from the sale of property acquired through foreclosure or repossession		0	1,066
Purchases of premises and equipment		(911)	(628)
Net cash provided by (used in) investing activities		(62,738)	(201,280)
Cash flows from financing activities:
Net increase (decrease) in deposits		170,789	207,432
Proceeds from Federal Home Loan Bank advances		414,000	879,000
Repayment of Federal Home Loan Bank advances		(540,947)	(821,930)
Treasury stock purchased		0	(4,322)
Net proceeds from stock option exercises and issuance of other equity awards, net of awards surrendered		(251)	(377)
Cash dividends paid		(9,012)	(8,883)
Net cash provided by (used in) financing activities		34,579	250,920
Net increase (decrease) in cash and cash equivalents		(31,525)	46,814
Cash and cash equivalents at beginning of period		202,268	138,455
Cash and cash equivalents at end of period		170,743	185,269
Noncash Investing and Financing Activities:
Loans charged off		64	635
Loans transferred to property acquired through foreclosure or repossession		0	28
Supplemental Disclosures:
Interest Payments		6,222	14,479
Income tax payments		$ 1,641	$ 1,036
[1]	As reported in the Consolidated Statements of Income.

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 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 commercial bank founded in 1800, and Weston Securities Corporation (“WSC”). Through its subsidiaries, the Bancorp offers a complete product line of financial services, including commercial, residential and consumer lending, retail and commercial deposit products, and wealth management services through its offices in Rhode Island, eastern Massachusetts and Connecticut. 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 in the capital trusts, classified in other assets, and the junior subordinated debentures are included in the Unaudited Consolidated Balance Sheets. Interest expense on the junior subordinated debentures is included in the Unaudited Consolidated Statements of Income. The accounting and reporting policies of the Corporation conform to accounting principles generally accepted in the United States of America (“GAAP”) and to general practices of the banking industry. In preparing the financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheet and revenues and expenses for the period. Actual results could differ from those estimates. 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	3 Months Ended
	Mar. 31, 2021
Accounting Standards Update and Change in Accounting Principle [Abstract]
Accounting Standards Update and Change in Accounting Principle	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, 2020 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 March 31, 2021.

Cash and Due from Banks

Cash and Due from Banks	3 Months Ended
	Mar. 31, 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 March 31, 2021 and December 31, 2020. Cash and due from banks included interest-bearing deposits in other banks of $99.3 million and $138.4 million, respectively, at March 31, 2021 and December 31, 2020. See Note 10 for additional disclosure regarding cash collateral pledged to derivative counterparties.

Securities

Securities	3 Months Ended
	Mar. 31, 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) March 31, 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 $186,193 $380 ($4,622) $— $181,951 Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 741,924 11,479 (10,416) — 742,987 Individual name issuer trust preferred debt securities 13,345 — (437) — 12,908 Corporate bonds 11,156 — (908) — 10,248 Total available for sale debt securities $952,618 $11,859 ($16,383) $— $948,094 (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 $2.1 million and $2.4 million, respectively, as of March 31, 2021 and December 31, 2020. Accrued interest receivable is included in other assets in the Unaudited Consolidated Balance Sheets. As of March 31, 2021 and December 31, 2020, debt securities with a fair value of $280.7 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) March 31, 2021 Amortized Cost Fair Value Due in one year or less $167,840 $168,061 Due after one year to five years 378,248 378,259 Due after five years to ten years 332,266 328,056 Due after ten years 74,264 73,718 Total debt securities $952,618 $948,094 Included in the above table are debt securities with an amortized cost balance of $209.4 million and a fair value of $203.8 million at March 31, 2021 that are callable at the discretion of the issuers. Final maturities of the callable securities range from 3 years to 16 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 March 31, 2021 and 2020 and, therefore there was no accrued interest related to debt securities reversed against interest income for the three months ended March 31, 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 March 31, 2021 # Fair Unrealized # Fair Unrealized # Fair Unrealized Obligations of U.S. government-sponsored enterprises 12 $135,278 ($4,622) — $— $— 12 $135,278 ($4,622) Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 40 415,160 (10,416) — — — 40 415,160 (10,416) Individual name issuer trust preferred debt securities — — — 5 12,908 (437) 5 12,908 (437) Corporate bonds — — — 3 10,248 (908) 3 10,248 (908) Total 52 $550,438 ($15,038) 8 $23,156 ($1,345) 60 $573,594 ($16,383) (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) Further deterioration in credit quality of the underlying issuers of the securities, deterioration in the condition of the financial services industry, worsening of the current economic environment, or additional declines in real estate values, among other things, may further affect the fair value of these securities and increase the potential that certain unrealized losses be designated as 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 March 31, 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 March 31, 2021. Individual Name Issuer Trust Preferred Debt Securities Included in debt securities in an unrealized loss position at March 31, 2021 were five trust preferred securities issued by four 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 March 31, 2021, there were two individual name issuer trust preferred debt securities with an amortized cost of $4.0 million and unrealized losses of $202 thousand that were rated below investment grade by Standard & Poors, Inc. (“S&P”). We noted no additional downgrades to below investment grade between March 31, 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 March 31, 2021. Corporate Bonds At March 31, 2021, the Corporation had three corporate bond holdings with unrealized losses totaling $908 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 March 31, 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 to changes in

Loans

Loans	3 Months Ended
	Mar. 31, 2021
Receivables [Abstract]
Loans	Loans The following is a summary of loans: (Dollars in thousands) March 31, December 31, 2020 Commercial: Commercial real estate (1) $1,618,540 $1,633,024 Commercial & industrial (2) 840,585 817,408 Total commercial 2,459,125 2,450,432 Residential Real Estate: Residential real estate (3) 1,457,490 1,467,312 Consumer: Home equity 256,799 259,185 Other (4) 21,252 19,061 Total consumer 278,051 278,246 Total loans (5) $4,194,666 $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 $228.6 million and $199.8 million, respectively, of PPP loans as of March 31, 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 fees of $223 thousand at March 31, 2021 and net unamortized loan origination costs of $1.5 million, at December 31, 2020 and net unamortized premiums on purchased loans of $653 thousand and $787 thousand, respectively, at March 31, 2021 and December 31, 2020. Loan balances exclude accrued interest receivable of $11.8 million and $11.3 million, respectively, as of March 31, 2021 and December 31, 2020. Accrued interest receivable is included in other assets in the Unaudited Consolidated Balance Sheets. As of both March 31, 2021 and December 31, 2020, loans amounting to $2.1 billion 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 has 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 (the “CRRSA 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. Since the beginning of the COVID-19 pandemic and through March 31, 2021, Washington Trust has processed loan payment deferral modifications, or "deferments", on 652 loans totaling $727 million. The majority of these deferments qualified as eligible loan modifications under Section 4013 of the CARES Act, as amended. As of March 31, 2021, we had active deferments on 88 loans totaling $191.4 million, or 5% 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 March 31, 2021 30-59 60-89 Over 90 Total Past Due Current Total Loans Commercial: Commercial real estate $— $— $— $— $1,618,540 $1,618,540 Commercial & industrial 1 — — 1 840,584 840,585 Total commercial 1 — — 1 2,459,124 2,459,125 Residential Real Estate: Residential real estate 3,156 819 5,686 9,661 1,447,829 1,457,490 Consumer: Home equity 577 68 486 1,131 255,668 256,799 Other 28 3 88 119 21,133 21,252 Total consumer 605 71 574 1,250 276,801 278,051 Total loans $3,762 $890 $6,260 $10,912 $4,183,754 $4,194,666 (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 March 31, 2021 and December 31, 2020, were nonaccrual loans of $8.4 million and $8.5 million, respectively. All loans 90 days or more past due at March 31, 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) Mar 31, Dec 31, Commercial: Commercial real estate $— $— Commercial & industrial — — Total commercial — — Residential Real Estate: Residential real estate 11,748 11,981 Consumer: Home equity 1,147 1,128 Other 88 88 Total consumer 1,235 1,216 Total nonaccrual loans $12,983 $13,197 Accruing loans 90 days or more past due $— $— No ACL was deemed necessary on nonaccrual loans with a carrying value of $4.3 million and $3.0 million, respectively, as of March 31, 2021 and December 31, 2020. As of March 31, 2021 and December 31, 2020, nonaccrual loans secured by one- to four-family residential property amounting to $3.1 million and $3.4 million, respectively, were in process of foreclosure. Nonaccrual loans of $4.6 million and $4.7 million, respectively, were current as to the payment of principal and interest at March 31, 2021 and December 31, 2020. There were no significant commitments to lend additional funds to borrowers whose loans were on nonaccrual status at March 31, 2021. The following table presents interest income recognized on nonaccrual loans: (Dollars in thousands) Interest Income Recognized Three months ended March 31, 2021 2020 Commercial: Commercial real estate $— $— Commercial & industrial 1 — Total commercial 1 — Residential Real Estate: Residential real estate 65 168 Consumer: Home equity 24 23 Other — — Total consumer 24 23 Total $90 $191 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. For the three months ended March 31, 2021 and 2020, there were no loans modified in a TDR. The following table presents the recorded investment in TDRs and certain other information related to TDRs: (Dollars in thousands) Mar 31, Dec 31, Accruing TDRs $12,443 $13,418 Nonaccrual TDRs 1,935 2,345 Total TDRs $14,378 $15,763 Specific reserves on TDRs included in the ACL on loans $161 $159 Additional commitments to lend to borrowers with TDRs $— $— The following table presents 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 March 31, 2021 2020 2021 2020 TDRs with a Payment Default: Residential real estate 1 — $396 $— 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 March 31, 2021, the carrying value of individually analyzed loans amounted to $16.8 million, of which $6.9 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) March 31, 2021 December 31, 2020 Carrying Value Related Allowance Carrying Value Related Allowance Commercial: Commercial real estate (1) $958 $— $1,792 $— Commercial & industrial (2) 398 — 451 — Total commercial 1,356 — 2,243 — Residential Real Estate: Residential real estate (3) 5,332 — 5,947 38 Consumer: Home equity (3) 254 183 254 183 Other — — — — Total consumer 254 183 254 183 Total $6,942 $183 $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 the 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 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 consideration 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 March 31, 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 $54,899 $284,731 $340,081 $223,920 $218,914 $374,800 $7,767 $2,360 $1,507,472 Special Mention — 689 29,726 39,470 16,174 23,324 727 — 110,110 Classified — 958 — — — — — — 958 Total CRE 54,899 286,378 369,807 263,390 235,088 398,124 8,494 2,360 1,618,540 C&I: Pass 99,420 233,508 93,874 95,248 55,001 128,130 96,981 1,237 803,399 Special Mention — 1,105 713 4,722 6,702 13,508 3,675 — 30,425 Classified — 398 — — — 6,363 — — 6,761 Total C&I 99,420 235,011 94,587 99,970 61,703 148,001 100,656 1,237 840,585 Residential Real Estate: Residential real estate: Current 119,706 438,489 227,838 128,283 130,769 402,744 — — 1,447,829 Past Due — 238 1,438 1,309 793 5,883 — — 9,661 Total residential real estate 119,706 438,727 229,276 129,592 131,562 408,627 — — 1,457,490 Consumer: Home equity: Current 1,791 8,710 6,097 3,535 1,222 4,787 219,028 10,498 255,668 Past Due — — — 24 — 68 185 854 1,131 Total home equity 1,791 8,710 6,097 3,559 1,222 4,855 219,213 11,352 256,799 Other: Current 3,799 5,119 1,804 1,147 1,489 7,514 260 1 21,133 Past Due 13 11 — — 7 88 — — 119 Total other 3,812 5,130 1,804 1,147 1,496 7,602 260 1 21,252 Total Loans $279,628 $973,956 $701,571 $497,658 $431,071 $967,209 $328,623 $14,950 $4,194,666 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	3 Months Ended
	Mar. 31, 2021
Receivables [Abstract]
Allowance for Loan Losses	Allowance for Credit Losses on Loans The ACL on loans is management’s estimate of expected credit losses over the expected life of the loans at the reporting date. 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. Adjustments to historical information 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 March 31, 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 — (3) (3) (50) — (11) (11) (64) Recoveries — 2 2 33 2 9 11 46 Provision (768) 162 (606) (1,556) 129 82 211 (1,951) Ending Balance $21,297 $12,389 $33,686 $6,469 $1,431 $551 $1,982 $42,137 The following table presents the activity in the allowance for loan losses for the three months ended March 31, 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 (153) (294) (447) — (173) (15) (188) (635) Recoveries — 4 4 — 1 7 8 12 Provision 1,743 3,671 5,414 893 323 143 466 6,773 Ending Balance $19,736 $10,331 $30,067 $7,729 $1,435 $434 $1,869 $39,665

Leases

Leases	3 Months Ended
	Mar. 31, 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 $28.8 million and $29.5 million, respectively, as of March 31, 2021 and December 31, 2020. Operating lease liabilities totaled $31.0 million and $31.7 million, respectively, as of March 31, 2021 and December 31, 2020. As of March 31, 2021 and December 31, 2020, there were no operating leases that had not yet commenced. Rental expense for operating leases is recognized on a straight-line basis over the lease term and amounted to $1.0 million and $964 thousand, respectively, for the three months ended March 31, 2021 and 2020. Variable lease components, such as consumer price index adjustments, are expensed as incurred and not included in ROU assets and operating lease liabilities. The following table presents information regarding the Corporation’s operating leases: Mar 31, 2021 Dec 31, 2020 Weighted average discount rate 3.35 % 3.34 % Range of lease expiration dates 4 months - 20 years 7 months - 20 years Range of lease renewal options 1 year - 5 years 1 year - 5 years Weighted average remaining lease term 13.2 years 13.4 years The following table presents the undiscounted annual lease payments under the terms of the Corporation’s operating leases at March 31, 2021, including a reconciliation to the present value of operating lease liabilities recognized in the Unaudited Consolidated Balance Sheets: (Dollars in thousands) April 1, 2021 to December 31, 2021 $2,932 2022 3,889 2023 3,828 2024 3,617 2025 2,879 2026 and thereafter 22,046 Total operating lease payments (1) 39,191 Less: interest 8,217 Present value of operating lease liabilities (2) $30,974 (1) Includes $2.1 million related to options to extend lease terms that are reasonably certain of being exercised. (2) Includes short-term operating lease liabilities of $2.9 million. The following table presents the components of total lease expense and operating cash flows: (Dollars in thousands) Three months ended March 31, 2021 2020 Lease Expense: Operating lease expense $1,005 $951 Variable lease expense 15 13 Total lease expense (1) $1,020 $964 Cash Paid: Cash paid reducing operating lease liabilities $989 $934 (1) Included in net occupancy expenses in the Unaudited Consolidated Income Statement.

Federal Home Loan Bank Advances

Federal Home Loan Bank Advances	3 Months Ended
	Mar. 31, 2021
Debt Disclosure [Abstract]
Federal Home Loan Bank Advances	Federal Home Loan Bank Advances Advances payable to the FHLB amounted to $466.9 million and $593.9 million, respectively, at March 31, 2021 and December 31, 2020. As of March 31, 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 $1.0 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 March 31, 2021: (Dollars in thousands) Scheduled Weighted April 1, 2021 to December 31, 2021 $416,787 0.41 % 2022 471 4.96 2023 495 4.96 2024 35,519 2.49 2025 2,349 4.98 2026 and thereafter 11,291 3.25 Balance at March 31, 2021 $466,912 0.67 %

Shareholders' Equity

Shareholders' Equity	3 Months Ended
	Mar. 31, 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 will 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 expires on October 31, 2021 and may be modified, suspended, or discontinued at any time. As of March 31, 2021, no shares have been repurchased under the 2020 Repurchase Program. Regulatory Capital Requirements Capital levels at March 31, 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 March 31, 2021 Total Capital (to Risk-Weighted Assets): Corporation $549,669 13.85 % $317,554 8.00 % N/A N/A Bank 544,695 13.72 317,526 8.00 $396,907 10.00 % Tier 1 Capital (to Risk-Weighted Assets): Corporation 515,478 12.99 238,165 6.00 N/A N/A Bank 510,504 12.86 238,144 6.00 317,526 8.00 Common Equity Tier 1 Capital (to Risk-Weighted Assets): Corporation 493,479 12.43 178,624 4.50 N/A N/A Bank 510,504 12.86 178,608 4.50 257,990 6.50 Tier 1 Capital (to Average Assets): (1) Corporation 515,478 9.11 226,336 4.00 N/A N/A Bank 510,504 9.03 226,255 4.00 282,819 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 March 31, 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 March 31, 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 has 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 March 31, 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

Derivative Financial Instrument

Derivative Financial Instruments	3 Months Ended
	Mar. 31, 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 March 31, 2021 and December 31, 2020, the Corporation had two interest rate swap contracts with a total notional amount of $60.0 million that were designated as cash flow hedges to hedge the interest rate risk associated with short-term variable rate FHLB advances. The interest rate swaps mature in 2021 and 2023. 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 March 31, 2021 and December 31, 2020, Washington Trust had interest rate swap contracts with commercial loan borrowers with notional amounts of $983.6 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 March 31, 2021, the notional amounts of risk participation-out agreements and risk participation-in agreements were $62.0 million and $107.5 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 March 31, 2021, the notional amounts of interest rate lock commitments and forward sale commitments were $155.8 million and $291.0 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 Mar 31, 2021 Dec 31, 2020 Balance Sheet Location Mar 31, 2021 Dec 31, 2020 Derivatives Designated as Cash Flow Hedging Instruments: Interest rate risk management contracts: Interest rate swaps Other assets $— $— Other liabilities $1,569 $1,958 Derivatives not Designated as Hedging Instruments: Loan related derivative contracts: Interest rate swaps with customers Other assets 44,732 75,804 Other liabilities 3,589 68 Mirror swaps with counterparties Other assets 3,497 67 Other liabilities 44,903 76,248 Risk participation agreements Other assets 2 22 Other liabilities 1 2 Mortgage loan commitments: Interest rate lock commitments Other assets 2,776 7,202 Other liabilities 102 — Forward sale commitments Other assets 3,193 — Other liabilities 666 2,914 Gross amounts 54,200 83,095 50,830 81,190 Less: amounts offset (1) 3,495 67 3,495 67 Derivative balances, net of offset 50,705 83,028 47,335 81,123 Less: collateral pledged (2) — — 39,945 74,698 Net amounts $50,705 $83,028 $7,390 $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 tables present the effect of derivative instruments in the Unaudited Consolidated Statements of Changes in Shareholders’ Equity and Unaudited Consolidated Statements of Income: (Dollars in thousands) Gain (Loss) Recognized in Three months ended March 31, 2021 2020 Derivatives Designated as Cash Flow Hedging Instruments: Interest rate risk management contracts: Interest rate caps $— $22 Interest rate swaps 297 (1,325) Interest rate floors — 253 Total $297 ($1,050) The Corporation previously had interest rate cap and interest rate floor contracts designated as cash flow hedges. During 2020, the interest rate caps and interest rate floors matured. 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. (Dollars in thousands) Amount of Gain (Loss) Three months ended March 31, Statement of Income Location 2021 2020 Derivatives not Designated as Hedging Instruments: Loan related derivative contracts: Interest rate swaps with customers Loan related derivative income ($30,231) $58,531 Mirror swaps with counterparties Loan related derivative income 30,683 (56,190) Risk participation agreements Loan related derivative income 15 114 Mortgage loan commitments: Interest rate lock commitments Mortgage banking revenues (4,529) 3,736 Forward sale commitments Mortgage banking revenues 7,285 (3,634) Total $3,223 $2,557

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 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 / impaired loans, property acquired through foreclosure or repossession and mortgage servicing rights. These nonrecurring fair value adjustments typically involve the application of lower of cost or market accounting or write-downs of individual assets. Fair value is a market-based measurement, not an entity-specific measurement. Fair value measurements are determined based on the assumptions the market participants would use in pricing the asset or liability. In addition, GAAP specifies a hierarchy of valuation techniques based on whether the types of valuation information (“inputs”) are observable or unobservable. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect the Corporation’s market assumptions. These two types of inputs have created the following fair value hierarchy: • Level 1 – Quoted prices for identical assets or liabilities in active markets. • Level 2 – Quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in inactive markets; and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets. • Level 3 – Valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable in the markets and which reflect the Corporation’s market assumptions. Fair Value Option Election GAAP allows for the irrevocable option to elect fair value accounting for the initial and subsequent measurement for certain financial assets and liabilities on a contract-by-contract basis. The Corporation has elected the fair value option for mortgage loans held for sale to better match changes in fair value of the loans with changes in the fair value of the forward sale commitment contracts used to economically hedge them. The following table presents a summary of mortgage loans held for sale accounted for under the fair value option: (Dollars in thousands) March 31, December 31, Aggregate fair value $77,450 $61,614 Aggregate principal balance 76,619 59,313 Difference between fair value and principal balance $831 $2,301 Changes in fair value of mortgage loans held for sale accounted for under the fair value option election (“fair value option adjustments”) are included in mortgage banking revenues in the Unaudited Consolidated Statements of Income. Fair value option adjustments amounted to a decrease of $1.5 million three months ended March 31, 2021, compared to an increase of $887 thousand in the three months ended March 31, 2020. There were no mortgage loans held for sale 90 days or more past due as of March 31, 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 March 31, 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 March 31, 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 / Impaired Loans The fair value of collateral dependent loans that are individually analyzed or were previously deemed impaired 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 / impaired 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 caps, swaps and floors are traded in over-the-counter markets where quoted market prices are not readily available. Fair value measurements are determined using independent pricing models that utilize primarily market observable inputs, such as swap rates of different maturities and LIBOR rates. The Corporation 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 March 31, 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 March 31, 2021 Assets: Available for sale debt securities: Obligations of U.S. government-sponsored enterprises $181,951 $— $181,951 $— Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 742,987 — 742,987 — Individual name issuer trust preferred debt securities 12,908 — 12,908 — Corporate bonds 10,248 — 10,248 — Mortgage loans held for sale 77,450 — 77,450 — Derivative assets 50,705 — 50,705 — Total assets at fair value on a recurring basis $1,076,249 $— $1,076,249 $— Liabilities: Derivative liabilities $47,335 $— $47,335 $— Total liabilities at fair value on a recurring basis $47,335 $— $47,335 $— (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 March 31, 2021, which were written down to fair value during the three months ended March 31, 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 $944 $— $— $944 Total assets at fair value on a nonrecurring basis $944 $— $— $944 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 March 31, 2021 Collateral dependent individually analyzed loans $944 Appraisals of collateral Discount for costs to sell 10% Appraisal adjustments 0% (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) March 31, 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 $4,152,529 $4,087,720 $— $— $4,087,720 Financial Liabilities: Time deposits $1,237,024 $1,241,936 $— $1,241,936 $— FHLB advances 466,912 470,727 — 470,727 — Junior subordinated debentures 22,681 19,805 — 19,805 — (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	3 Months Ended
	Mar. 31, 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 March 31, 2021 2020 (Dollars in thousands) Revenue (1) ASC 606 Revenue (2) Revenue (1) ASC 606 Revenue (2) Net interest income $32,871 $— $32,602 $— Noninterest income: Asset-based wealth management revenues 9,583 9,583 8,355 8,355 Transaction-based wealth management revenues 312 312 334 334 Total wealth management revenues 9,895 9,895 8,689 8,689 Mortgage banking revenues 11,927 — 6,096 — Card interchange fees 1,133 1,133 947 947 Service charges on deposit accounts 609 609 860 860 Loan related derivative income 467 — 2,455 — Income from bank-owned life insurance 556 — 564 — Other income 1,387 1,245 316 247 Total noninterest income 25,974 12,882 19,927 10,743 Total revenues $58,845 $12,882 $52,529 $10,743 (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 ended March 31, 2021 2020 Revenue recognized at a point in time: Card interchange fees $1,133 $947 Service charges on deposit accounts 481 667 Other income 1,203 200 Revenue recognized over time: Wealth management revenues 9,895 8,689 Service charges on deposit accounts 128 193 Other income 42 47 Total revenues from contracts in scope of Topic 606 $12,882 $10,743 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 $5.2 million at March 31, 2021, compared to $4.8 million at 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 March 31, 2021 and March 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 $1.4 million at March 31, 2021, compared to $1.5 million at December 31, 2020 and were included in other assets in the Unaudited Consolidated Balance Sheets.

Defined Benefit Pension Plans

Defined Benefit Pension Plans	3 Months Ended
	Mar. 31, 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 ended March 31, 2021 2020 2021 2020 Net Periodic Benefit Cost: Service cost (1) $592 $541 $52 $43 Interest cost (2) 645 626 84 116 Expected return on plan assets (2) (1,204) (1,135) — — Recognized net actuarial loss (2) 387 396 158 140 Net periodic benefit cost $420 $428 $294 $299 (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 three months ended March 31, 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	3 Months Ended
	Mar. 31, 2021
Share-based Payment Arrangement [Abstract]
Share-Based Compensation Arrangements	Share-Based Compensation Arrangements During the three months ended March 31, 2021, the Corporation granted performance share unit awards and nonvested share unit awards. The Corporation granted performance share unit awards 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. The Corporation granted to certain key employees 1,760 nonvested share units with 3-year cliff vesting. The weighted average grant date fair value of the nonvested share units was $46.15.

Business Segments

Business Segments	3 Months Ended
	Mar. 31, 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 amounts in the Corporate unit include activity not related to the segments. Management uses certain methodologies to allocate income and expenses to the business lines. 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 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 Wealth Management Services 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 March 31, 2021 2020 2021 2020 2021 2020 2021 2020 Net interest income (expense) $34,520 $29,009 ($23) ($67) ($1,626) $3,660 $32,871 $32,602 Provision for credit losses (2,000) 7,036 — — — — (2,000) 7,036 Net interest income (expense) after provision for credit losses 36,520 21,973 (23) (67) (1,626) 3,660 34,871 25,566 Noninterest income 14,515 10,665 10,895 8,689 564 573 25,974 19,927 Noninterest expenses: Depreciation and amortization expense 657 619 351 354 46 40 1,054 1,013 Other noninterest expenses 20,001 18,842 6,386 6,846 7,272 3,752 33,659 29,440 Total noninterest expenses 20,658 19,461 6,737 7,200 7,318 3,792 34,713 30,453 Income (loss) before income taxes 30,377 13,177 4,135 1,422 (8,380) 441 26,132 15,040 Income tax expense (benefit) 6,592 2,764 954 356 (1,885) 19 5,661 3,139 Net income (loss) $23,785 $10,413 $3,181 $1,066 ($6,495) $422 $20,471 $11,901 Total assets at period end $4,491,675 $4,367,469 $74,902 $74,283 $1,152,812 $1,179,227 $5,719,389 $5,620,979 Expenditures for long-lived assets 835 526 58 53 18 49 911 628

Other Comprehensive Income (Los

Other Comprehensive Income (Loss)	3 Months Ended
	Mar. 31, 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 March 31, 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 ($17,525) ($4,206) ($13,319) $16,740 $3,934 $12,806 Cash flow hedges: Change in fair value of cash flow hedges 109 26 83 (1,402) (330) (1,072) Net cash flow hedge gains reclassified into earnings (1) (2) 281 67 214 29 7 22 Net change in fair value of cash flow hedges 390 93 297 (1,373) (323) (1,050) Defined benefit plan obligations: Amortization of net actuarial losses (3) 545 138 407 536 126 410 Total other comprehensive (loss) income ($16,590) ($3,975) ($12,615) $15,903 $3,737 $12,166 (1) The pre-tax amounts for the three months ended March 31, 2021 are included in interest expense on FHLB advances. (2) The pre-tax amounts for the three months ended March 31, 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) Gains on Cash Flow Hedges Defined Benefit Pension Plan Adjustment Total For the three months ended March 31, 2021 Balance at December 31, 2020 $9,881 ($1,447) ($15,825) ($7,391) Other comprehensive (loss) income before reclassifications (13,319) 83 — (13,236) Amounts reclassified from accumulated other comprehensive income — 214 407 621 Net other comprehensive (loss) income (13,319) 297 407 (12,615) Balance at March 31, 2021 ($3,438) ($1,150) ($15,418) ($20,006) (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 three months ended March 31, 2020 Balance at December 31, 2019 $3,226 ($793) ($13,670) ($11,237) Other comprehensive income (loss) before reclassifications 12,806 (1,072) — 11,734 Amounts reclassified from accumulated other comprehensive income — 22 410 432 Net other comprehensive income (loss) 12,806 (1,050) 410 12,166 Balance at March 31, 2020 $16,032 ($1,843) ($13,260) $929

Earnings Per Common Share

Earnings Per Common Share	3 Months Ended
	Mar. 31, 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 ended March 31, 2021 2020 Earnings per common share - basic: Net income $20,471 $11,901 Less: dividends and undistributed earnings allocated to participating securities (56) (32) Net income available to common shareholders $20,415 $11,869 Weighted average common shares 17,275 17,345 Earnings per common share - basic $1.18 $0.68 Earnings per common share - diluted: Net income $20,471 $11,901 Less: dividends and undistributed earnings allocated to participating securities (56) (32) Net income available to common shareholders $20,415 $11,869 Weighted average common shares 17,275 17,345 Dilutive effect of common stock equivalents 156 96 Weighted average diluted common shares 17,431 17,441 Earnings per common share - diluted $1.17 $0.68 Weighted average common stock equivalents, not included in common stock equivalents above because they were anti-dilutive, totaled 149,575 and 152,010, respectively, for the three months ended March 31, 2021 and 2020.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 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 $11.6 million and $11.7 million, respectively, as of March 31, 2021 and December 31, 2020. At March 31, 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 months ended March 31, 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) Mar 31, Dec 31, Financial instruments whose contract amounts represent credit risk (unfunded commitments): Commitments to extend credit: Commercial loans $438,236 $453,493 Home equity lines 331,717 319,744 Other loans 129,540 89,078 Standby letters of credit 11,570 11,709 Financial instruments whose notional amounts exceed the amounts of credit risk: Mortgage loan commitments: Interest rate lock commitments 155,800 167,671 Forward sale commitments 290,989 279,653 Loan related derivative contracts: Interest rate swaps with customers 983,619 991,002 Mirror swaps with counterparties 983,619 991,002 Risk participation-in agreements 107,493 92,717 Interest rate risk management contracts: Interest rate swaps 60,000 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 March 31, 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 46 (88) (42) (8) — 1 1 (49) Ending Balance $953 $1,314 $2,267 $46 $— $20 $20 $2,333 The activity in the ACL on unfunded commitments for the three months ended March 31, 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 ASC 326 817 626 1,443 34 — 6 6 1,483 Provision 179 77 256 2 — 5 5 263 Ending Balance $1,132 $847 $1,979 $42 $— $18 $18 $2,039 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)	3 Months Ended
	Mar. 31, 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 in the capital trusts, classified in other assets, and the junior subordinated debentures are included in the Unaudited Consolidated Balance Sheets. Interest expense on the junior subordinated debentures is included in the Unaudited Consolidated Statements of Income.
Basis of Accounting	The accounting and reporting policies of the Corporation conform to accounting principles generally accepted in the United States of America (“GAAP”) and to general practices of the banking industry.
Use of Estimates	In preparing the financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheet and revenues and expenses for the period.  Actual results could differ from those estimates. 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)	3 Months Ended
	Mar. 31, 2021
Receivables [Abstract]
Allowance for Credits Losses on Loans	The ACL on loans is management’s estimate of expected credit losses over the expected life of the loans at the reporting date. 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. Adjustments to historical information 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)	3 Months Ended
	Mar. 31, 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) March 31, 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 $186,193 $380 ($4,622) $— $181,951 Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 741,924 11,479 (10,416) — 742,987 Individual name issuer trust preferred debt securities 13,345 — (437) — 12,908 Corporate bonds 11,156 — (908) — 10,248 Total available for sale debt securities $952,618 $11,859 ($16,383) $— $948,094 (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) March 31, 2021 Amortized Cost Fair Value Due in one year or less $167,840 $168,061 Due after one year to five years 378,248 378,259 Due after five years to ten years 332,266 328,056 Due after ten years 74,264 73,718 Total debt securities $952,618 $948,094
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 March 31, 2021 # Fair Unrealized # Fair Unrealized # Fair Unrealized Obligations of U.S. government-sponsored enterprises 12 $135,278 ($4,622) — $— $— 12 $135,278 ($4,622) Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 40 415,160 (10,416) — — — 40 415,160 (10,416) Individual name issuer trust preferred debt securities — — — 5 12,908 (437) 5 12,908 (437) Corporate bonds — — — 3 10,248 (908) 3 10,248 (908) Total 52 $550,438 ($15,038) 8 $23,156 ($1,345) 60 $573,594 ($16,383) (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)	3 Months Ended
	Mar. 31, 2021
Receivables [Abstract]
Summary of Loans	The following is a summary of loans: (Dollars in thousands) March 31, December 31, 2020 Commercial: Commercial real estate (1) $1,618,540 $1,633,024 Commercial & industrial (2) 840,585 817,408 Total commercial 2,459,125 2,450,432 Residential Real Estate: Residential real estate (3) 1,457,490 1,467,312 Consumer: Home equity 256,799 259,185 Other (4) 21,252 19,061 Total consumer 278,051 278,246 Total loans (5) $4,194,666 $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 $228.6 million and $199.8 million, respectively, of PPP loans as of March 31, 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 fees of $223 thousand at March 31, 2021 and net unamortized loan origination costs of $1.5 million, at December 31, 2020 and net unamortized premiums on purchased loans of $653 thousand and $787 thousand, respectively, at March 31, 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 March 31, 2021 30-59 60-89 Over 90 Total Past Due Current Total Loans Commercial: Commercial real estate $— $— $— $— $1,618,540 $1,618,540 Commercial & industrial 1 — — 1 840,584 840,585 Total commercial 1 — — 1 2,459,124 2,459,125 Residential Real Estate: Residential real estate 3,156 819 5,686 9,661 1,447,829 1,457,490 Consumer: Home equity 577 68 486 1,131 255,668 256,799 Other 28 3 88 119 21,133 21,252 Total consumer 605 71 574 1,250 276,801 278,051 Total loans $3,762 $890 $6,260 $10,912 $4,183,754 $4,194,666 (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) Mar 31, Dec 31, Commercial: Commercial real estate $— $— Commercial & industrial — — Total commercial — — Residential Real Estate: Residential real estate 11,748 11,981 Consumer: Home equity 1,147 1,128 Other 88 88 Total consumer 1,235 1,216 Total nonaccrual loans $12,983 $13,197 Accruing loans 90 days or more past due $— $— No ACL was deemed necessary on nonaccrual loans with a carrying value of $4.3 million and $3.0 million, respectively, as of March 31, 2021 and December 31, 2020. As of March 31, 2021 and December 31, 2020, nonaccrual loans secured by one- to four-family residential property amounting to $3.1 million and $3.4 million, respectively, were in process of foreclosure. Nonaccrual loans of $4.6 million and $4.7 million, respectively, were current as to the payment of principal and interest at March 31, 2021 and December 31, 2020. There were no significant commitments to lend additional funds to borrowers whose loans were on nonaccrual status at March 31, 2021. The following table presents interest income recognized on nonaccrual loans: (Dollars in thousands) Interest Income Recognized Three months ended March 31, 2021 2020 Commercial: Commercial real estate $— $— Commercial & industrial 1 — Total commercial 1 — Residential Real Estate: Residential real estate 65 168 Consumer: Home equity 24 23 Other — — Total consumer 24 23 Total $90 $191
Summary of TDRs	The following table presents the recorded investment in TDRs and certain other information related to TDRs: (Dollars in thousands) Mar 31, Dec 31, Accruing TDRs $12,443 $13,418 Nonaccrual TDRs 1,935 2,345 Total TDRs $14,378 $15,763 Specific reserves on TDRs included in the ACL on loans $161 $159 Additional commitments to lend to borrowers with TDRs $— $—
TDRs with payment default	The following table presents 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 March 31, 2021 2020 2021 2020 TDRs with a Payment Default: Residential real estate 1 — $396 $—
Collateral Dependent Individually Analyzed Loans	The following table presents the carrying value of collateral dependent individually analyzed loans: (Dollars in thousands) March 31, 2021 December 31, 2020 Carrying Value Related Allowance Carrying Value Related Allowance Commercial: Commercial real estate (1) $958 $— $1,792 $— Commercial & industrial (2) 398 — 451 — Total commercial 1,356 — 2,243 — Residential Real Estate: Residential real estate (3) 5,332 — 5,947 38 Consumer: Home equity (3) 254 183 254 183 Other — — — — Total consumer 254 183 254 183 Total $6,942 $183 $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 March 31, 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 $54,899 $284,731 $340,081 $223,920 $218,914 $374,800 $7,767 $2,360 $1,507,472 Special Mention — 689 29,726 39,470 16,174 23,324 727 — 110,110 Classified — 958 — — — — — — 958 Total CRE 54,899 286,378 369,807 263,390 235,088 398,124 8,494 2,360 1,618,540 C&I: Pass 99,420 233,508 93,874 95,248 55,001 128,130 96,981 1,237 803,399 Special Mention — 1,105 713 4,722 6,702 13,508 3,675 — 30,425 Classified — 398 — — — 6,363 — — 6,761 Total C&I 99,420 235,011 94,587 99,970 61,703 148,001 100,656 1,237 840,585 Residential Real Estate: Residential real estate: Current 119,706 438,489 227,838 128,283 130,769 402,744 — — 1,447,829 Past Due — 238 1,438 1,309 793 5,883 — — 9,661 Total residential real estate 119,706 438,727 229,276 129,592 131,562 408,627 — — 1,457,490 Consumer: Home equity: Current 1,791 8,710 6,097 3,535 1,222 4,787 219,028 10,498 255,668 Past Due — — — 24 — 68 185 854 1,131 Total home equity 1,791 8,710 6,097 3,559 1,222 4,855 219,213 11,352 256,799 Other: Current 3,799 5,119 1,804 1,147 1,489 7,514 260 1 21,133 Past Due 13 11 — — 7 88 — — 119 Total other 3,812 5,130 1,804 1,147 1,496 7,602 260 1 21,252 Total Loans $279,628 $973,956 $701,571 $497,658 $431,071 $967,209 $328,623 $14,950 $4,194,666 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)	3 Months Ended
	Mar. 31, 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 March 31, 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 — (3) (3) (50) — (11) (11) (64) Recoveries — 2 2 33 2 9 11 46 Provision (768) 162 (606) (1,556) 129 82 211 (1,951) Ending Balance $21,297 $12,389 $33,686 $6,469 $1,431 $551 $1,982 $42,137 The following table presents the activity in the allowance for loan losses for the three months ended March 31, 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 (153) (294) (447) — (173) (15) (188) (635) Recoveries — 4 4 — 1 7 8 12 Provision 1,743 3,671 5,414 893 323 143 466 6,773 Ending Balance $19,736 $10,331 $30,067 $7,729 $1,435 $434 $1,869 $39,665

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2021
Leases [Abstract]
Schedule of operating lease terms	The following table presents information regarding the Corporation’s operating leases: Mar 31, 2021 Dec 31, 2020 Weighted average discount rate 3.35 % 3.34 % Range of lease expiration dates 4 months - 20 years 7 months - 20 years Range of lease renewal options 1 year - 5 years 1 year - 5 years Weighted average remaining lease term 13.2 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 March 31, 2021, including a reconciliation to the present value of operating lease liabilities recognized in the Unaudited Consolidated Balance Sheets: (Dollars in thousands) April 1, 2021 to December 31, 2021 $2,932 2022 3,889 2023 3,828 2024 3,617 2025 2,879 2026 and thereafter 22,046 Total operating lease payments (1) 39,191 Less: interest 8,217 Present value of operating lease liabilities (2) $30,974 (1) Includes $2.1 million related to options to extend lease terms that are reasonably certain of being exercised. (2) Includes short-term operating lease liabilities of $2.9 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 ended March 31, 2021 2020 Lease Expense: Operating lease expense $1,005 $951 Variable lease expense 15 13 Total lease expense (1) $1,020 $964 Cash Paid: Cash paid reducing operating lease liabilities $989 $934 (1) Included in net occupancy expenses in the Unaudited Consolidated Income Statement.

Federal Home Loan Bank Advanc_2

Federal Home Loan Bank Advances (Tables)	3 Months Ended
	Mar. 31, 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 March 31, 2021: (Dollars in thousands) Scheduled Weighted April 1, 2021 to December 31, 2021 $416,787 0.41 % 2022 471 4.96 2023 495 4.96 2024 35,519 2.49 2025 2,349 4.98 2026 and thereafter 11,291 3.25 Balance at March 31, 2021 $466,912 0.67 %

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	3 Months Ended
	Mar. 31, 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 March 31, 2021 Total Capital (to Risk-Weighted Assets): Corporation $549,669 13.85 % $317,554 8.00 % N/A N/A Bank 544,695 13.72 317,526 8.00 $396,907 10.00 % Tier 1 Capital (to Risk-Weighted Assets): Corporation 515,478 12.99 238,165 6.00 N/A N/A Bank 510,504 12.86 238,144 6.00 317,526 8.00 Common Equity Tier 1 Capital (to Risk-Weighted Assets): Corporation 493,479 12.43 178,624 4.50 N/A N/A Bank 510,504 12.86 178,608 4.50 257,990 6.50 Tier 1 Capital (to Average Assets): (1) Corporation 515,478 9.11 226,336 4.00 N/A N/A Bank 510,504 9.03 226,255 4.00 282,819 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)	3 Months Ended
	Mar. 31, 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 Mar 31, 2021 Dec 31, 2020 Balance Sheet Location Mar 31, 2021 Dec 31, 2020 Derivatives Designated as Cash Flow Hedging Instruments: Interest rate risk management contracts: Interest rate swaps Other assets $— $— Other liabilities $1,569 $1,958 Derivatives not Designated as Hedging Instruments: Loan related derivative contracts: Interest rate swaps with customers Other assets 44,732 75,804 Other liabilities 3,589 68 Mirror swaps with counterparties Other assets 3,497 67 Other liabilities 44,903 76,248 Risk participation agreements Other assets 2 22 Other liabilities 1 2 Mortgage loan commitments: Interest rate lock commitments Other assets 2,776 7,202 Other liabilities 102 — Forward sale commitments Other assets 3,193 — Other liabilities 666 2,914 Gross amounts 54,200 83,095 50,830 81,190 Less: amounts offset (1) 3,495 67 3,495 67 Derivative balances, net of offset 50,705 83,028 47,335 81,123 Less: collateral pledged (2) — — 39,945 74,698 Net amounts $50,705 $83,028 $7,390 $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 tables present the effect of derivative instruments in the Unaudited Consolidated Statements of Changes in Shareholders’ Equity and Unaudited Consolidated Statements of Income: (Dollars in thousands) Gain (Loss) Recognized in Three months ended March 31, 2021 2020 Derivatives Designated as Cash Flow Hedging Instruments: Interest rate risk management contracts: Interest rate caps $— $22 Interest rate swaps 297 (1,325) Interest rate floors — 253 Total $297 ($1,050) The Corporation previously had interest rate cap and interest rate floor contracts designated as cash flow hedges. During 2020, the interest rate caps and interest rate floors matured. 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. (Dollars in thousands) Amount of Gain (Loss) Three months ended March 31, Statement of Income Location 2021 2020 Derivatives not Designated as Hedging Instruments: Loan related derivative contracts: Interest rate swaps with customers Loan related derivative income ($30,231) $58,531 Mirror swaps with counterparties Loan related derivative income 30,683 (56,190) Risk participation agreements Loan related derivative income 15 114 Mortgage loan commitments: Interest rate lock commitments Mortgage banking revenues (4,529) 3,736 Forward sale commitments Mortgage banking revenues 7,285 (3,634) Total $3,223 $2,557

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 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) March 31, December 31, Aggregate fair value $77,450 $61,614 Aggregate principal balance 76,619 59,313 Difference between fair value and principal balance $831 $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 March 31, 2021 Assets: Available for sale debt securities: Obligations of U.S. government-sponsored enterprises $181,951 $— $181,951 $— Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 742,987 — 742,987 — Individual name issuer trust preferred debt securities 12,908 — 12,908 — Corporate bonds 10,248 — 10,248 — Mortgage loans held for sale 77,450 — 77,450 — Derivative assets 50,705 — 50,705 — Total assets at fair value on a recurring basis $1,076,249 $— $1,076,249 $— Liabilities: Derivative liabilities $47,335 $— $47,335 $— Total liabilities at fair value on a recurring basis $47,335 $— $47,335 $— (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 March 31, 2021, which were written down to fair value during the three months ended March 31, 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 $944 $— $— $944 Total assets at fair value on a nonrecurring basis $944 $— $— $944 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 March 31, 2021 Collateral dependent individually analyzed loans $944 Appraisals of collateral Discount for costs to sell 10% Appraisal adjustments 0% (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) March 31, 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 $4,152,529 $4,087,720 $— $— $4,087,720 Financial Liabilities: Time deposits $1,237,024 $1,241,936 $— $1,241,936 $— FHLB advances 466,912 470,727 — 470,727 — Junior subordinated debentures 22,681 19,805 — 19,805 — (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)	3 Months Ended
	Mar. 31, 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 March 31, 2021 2020 (Dollars in thousands) Revenue (1) ASC 606 Revenue (2) Revenue (1) ASC 606 Revenue (2) Net interest income $32,871 $— $32,602 $— Noninterest income: Asset-based wealth management revenues 9,583 9,583 8,355 8,355 Transaction-based wealth management revenues 312 312 334 334 Total wealth management revenues 9,895 9,895 8,689 8,689 Mortgage banking revenues 11,927 — 6,096 — Card interchange fees 1,133 1,133 947 947 Service charges on deposit accounts 609 609 860 860 Loan related derivative income 467 — 2,455 — Income from bank-owned life insurance 556 — 564 — Other income 1,387 1,245 316 247 Total noninterest income 25,974 12,882 19,927 10,743 Total revenues $58,845 $12,882 $52,529 $10,743 (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 ended March 31, 2021 2020 Revenue recognized at a point in time: Card interchange fees $1,133 $947 Service charges on deposit accounts 481 667 Other income 1,203 200 Revenue recognized over time: Wealth management revenues 9,895 8,689 Service charges on deposit accounts 128 193 Other income 42 47 Total revenues from contracts in scope of Topic 606 $12,882 $10,743

Defined Benefit Pension Plans (

Defined Benefit Pension Plans (Tables)	3 Months Ended
	Mar. 31, 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 ended March 31, 2021 2020 2021 2020 Net Periodic Benefit Cost: Service cost (1) $592 $541 $52 $43 Interest cost (2) 645 626 84 116 Expected return on plan assets (2) (1,204) (1,135) — — Recognized net actuarial loss (2) 387 396 158 140 Net periodic benefit cost $420 $428 $294 $299 (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 three months ended March 31, 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)	3 Months Ended
	Mar. 31, 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 March 31, 2021 2020 2021 2020 2021 2020 2021 2020 Net interest income (expense) $34,520 $29,009 ($23) ($67) ($1,626) $3,660 $32,871 $32,602 Provision for credit losses (2,000) 7,036 — — — — (2,000) 7,036 Net interest income (expense) after provision for credit losses 36,520 21,973 (23) (67) (1,626) 3,660 34,871 25,566 Noninterest income 14,515 10,665 10,895 8,689 564 573 25,974 19,927 Noninterest expenses: Depreciation and amortization expense 657 619 351 354 46 40 1,054 1,013 Other noninterest expenses 20,001 18,842 6,386 6,846 7,272 3,752 33,659 29,440 Total noninterest expenses 20,658 19,461 6,737 7,200 7,318 3,792 34,713 30,453 Income (loss) before income taxes 30,377 13,177 4,135 1,422 (8,380) 441 26,132 15,040 Income tax expense (benefit) 6,592 2,764 954 356 (1,885) 19 5,661 3,139 Net income (loss) $23,785 $10,413 $3,181 $1,066 ($6,495) $422 $20,471 $11,901 Total assets at period end $4,491,675 $4,367,469 $74,902 $74,283 $1,152,812 $1,179,227 $5,719,389 $5,620,979 Expenditures for long-lived assets 835 526 58 53 18 49 911 628

Other Comprehensive Income (L_2

Other Comprehensive Income (Loss) (Tables)	3 Months Ended
	Mar. 31, 2021
Equity [Abstract]
Activity in Other Comprehensive Income (Loss)	The following tables present the activity in other comprehensive income (loss): Three months ended March 31, 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 ($17,525) ($4,206) ($13,319) $16,740 $3,934 $12,806 Cash flow hedges: Change in fair value of cash flow hedges 109 26 83 (1,402) (330) (1,072) Net cash flow hedge gains reclassified into earnings (1) (2) 281 67 214 29 7 22 Net change in fair value of cash flow hedges 390 93 297 (1,373) (323) (1,050) Defined benefit plan obligations: Amortization of net actuarial losses (3) 545 138 407 536 126 410 Total other comprehensive (loss) income ($16,590) ($3,975) ($12,615) $15,903 $3,737 $12,166 (1) The pre-tax amounts for the three months ended March 31, 2021 are included in interest expense on FHLB advances. (2) The pre-tax amounts for the three months ended March 31, 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)	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) Gains on Cash Flow Hedges Defined Benefit Pension Plan Adjustment Total For the three months ended March 31, 2021 Balance at December 31, 2020 $9,881 ($1,447) ($15,825) ($7,391) Other comprehensive (loss) income before reclassifications (13,319) 83 — (13,236) Amounts reclassified from accumulated other comprehensive income — 214 407 621 Net other comprehensive (loss) income (13,319) 297 407 (12,615) Balance at March 31, 2021 ($3,438) ($1,150) ($15,418) ($20,006) (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 three months ended March 31, 2020 Balance at December 31, 2019 $3,226 ($793) ($13,670) ($11,237) Other comprehensive income (loss) before reclassifications 12,806 (1,072) — 11,734 Amounts reclassified from accumulated other comprehensive income — 22 410 432 Net other comprehensive income (loss) 12,806 (1,050) 410 12,166 Balance at March 31, 2020 $16,032 ($1,843) ($13,260) $929

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	3 Months Ended
	Mar. 31, 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 ended March 31, 2021 2020 Earnings per common share - basic: Net income $20,471 $11,901 Less: dividends and undistributed earnings allocated to participating securities (56) (32) Net income available to common shareholders $20,415 $11,869 Weighted average common shares 17,275 17,345 Earnings per common share - basic $1.18 $0.68 Earnings per common share - diluted: Net income $20,471 $11,901 Less: dividends and undistributed earnings allocated to participating securities (56) (32) Net income available to common shareholders $20,415 $11,869 Weighted average common shares 17,275 17,345 Dilutive effect of common stock equivalents 156 96 Weighted average diluted common shares 17,431 17,441 Earnings per common share - diluted $1.17 $0.68

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 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) Mar 31, Dec 31, Financial instruments whose contract amounts represent credit risk (unfunded commitments): Commitments to extend credit: Commercial loans $438,236 $453,493 Home equity lines 331,717 319,744 Other loans 129,540 89,078 Standby letters of credit 11,570 11,709 Financial instruments whose notional amounts exceed the amounts of credit risk: Mortgage loan commitments: Interest rate lock commitments 155,800 167,671 Forward sale commitments 290,989 279,653 Loan related derivative contracts: Interest rate swaps with customers 983,619 991,002 Mirror swaps with counterparties 983,619 991,002 Risk participation-in agreements 107,493 92,717 Interest rate risk management contracts: Interest rate swaps 60,000 60,000
Allowance for Credit Losses on Unfunded Commitments Rollforward	The activity in the ACL on unfunded commitments for the three months ended March 31, 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 46 (88) (42) (8) — 1 1 (49) Ending Balance $953 $1,314 $2,267 $46 $— $20 $20 $2,333 The activity in the ACL on unfunded commitments for the three months ended March 31, 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 ASC 326 817 626 1,443 34 — 6 6 1,483 Provision 179 77 256 2 — 5 5 263 Ending Balance $1,132 $847 $1,979 $42 $— $18 $18 $2,039

Cash and Due from Banks (Narrat

Cash and Due from Banks (Narrative) (Details) - USD ($) $ in Millions	Mar. 31, 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	$ 99.3	$ 138.4

Securities (Narrative) (Details

Securities (Narrative) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021USD ($)security	Dec. 31, 2020USD ($)security
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Accrued interest receivable	$ 2,100	$ 2,400
Fair value of available for sale and held to maturity securities pledged as collateral	280,700	$ 291,900
Amortized cost of callable debt securities	209,400
Fair value of callable debt securities	$ 203,800
Number of securities in a continuous unrealized loss position total | security	60	30
Number of debt securities below investment grade | security	2
Unrealized losses of securities in a continuous unrealized loss position total	$ (16,383)	$ (2,569)
Loans pledged as collateral	$ 2,100,000	$ 2,100,000
Individual name issuer trust preferred debt securities
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Number of securities in a continuous unrealized loss position total | security	5	5
Securities in unrealized loss position, number of companies issuing securities | security	4
Amortized cost of trust preferred securities of individual name issuers that are below investment grade	$ 4,000
Unrealized losses of trust preferred securities of individual name issuers that are below investment grade	202
Unrealized losses of securities in a continuous unrealized loss position total	$ (437)	$ (672)
Corporate bonds [Member]
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Number of securities in a continuous unrealized loss position total | security	3	3
Unrealized losses of securities in a continuous unrealized loss position total	$ (908)	$ (1,225)
Minimum [Member]
Schedule of Available for Sale and Held to Maturty 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 Maturty Securities [Line Items]
Maturity period of callable debt securities	16 years
Call features of callable debt securities	1 year

Securities (Summary of Investme

Securities (Summary of Investments) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Available for sale debt securities amortized cost basis	$ 952,618	$ 881,570
Available for sale debt securities unrealized gains	11,859	15,570
Available for sale debt securities unrealized losses	(16,383)	(2,569)
Available for sale debt securities allowance for credit losses	0	0
Available for sale debt securities, at fair value	948,094	894,571
Obligations of U.S. government-sponsored enterprises [Member]
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Available for sale debt securities amortized cost basis	186,193	131,186
Available for sale debt securities unrealized gains	380	628
Available for sale debt securities unrealized losses	(4,622)	(145)
Available for sale debt securities allowance for credit losses	0	0
Available for sale debt securities, at fair value	181,951	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 Maturty Securities [Line Items]
Available for sale debt securities amortized cost basis	741,924	725,890
Available for sale debt securities unrealized gains	11,479	14,942
Available for sale debt securities unrealized losses	(10,416)	(527)
Available for sale debt securities allowance for credit losses	0	0
Available for sale debt securities, at fair value	742,987	740,305
Individual name issuer trust preferred debt securities
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Available for sale debt securities amortized cost basis	13,345	13,341
Available for sale debt securities unrealized gains	0	0
Available for sale debt securities unrealized losses	(437)	(672)
Available for sale debt securities allowance for credit losses	0	0
Available for sale debt securities, at fair value	12,908	12,669
Corporate bonds [Member]
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Available for sale debt securities amortized cost basis	11,156	11,153
Available for sale debt securities unrealized gains	0	0
Available for sale debt securities unrealized losses	(908)	(1,225)
Available for sale debt securities allowance for credit losses	0	0
Available for sale debt securities, at fair value	$ 10,248	$ 9,928

Securities (Securities by Contr

Securities (Securities by Contractual Maturity) (Details) $ in Thousands	Mar. 31, 2021USD ($)
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Available for sale debt securities maturities within 1 year amortized cost	$ 167,840
Available for sale debt securities maturities 1-5 years amortized cost	378,248
Available for sale debt securities maturities 5-10 years amortized cost	332,266
Available for sale debt securities maturities after 10 years amortized cost	74,264
Available for sale debt securities maturities total amortized cost	952,618
Available for sale debt securities maturities within 1 year fair value	168,061
Available for sale debt securities maturities 1-5 years fair value	378,259
Available for sale debt securities maturities 5-10 years fair value	328,056
Available for sale debt securities maturities after 10 years fair value	73,718
Available for sale debt securities fair value	$ 948,094

Securities (Securities in a Con

Securities (Securities in a Continuous Unrealized Loss Position) (Details) $ in Thousands	Mar. 31, 2021USD ($)security	Dec. 31, 2020USD ($)security
Debt Securities, Available-for-sale [Line Items]
Number of securities in a continuous unrealized loss position for less than 12 months | security	52	22
Fair value of securities in a continuous unrealized loss position for less than 12 months	$ 550,438	$ 171,139
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	$ (15,038)	$ (672)
Number of securities in a continuous unrealized loss position for 12 months or longer | security	8	8
Fair value of securities in a continuous unrealized loss position for 12 months or longer	$ 23,156	$ 22,597
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	$ (1,345)	$ (1,897)
Number of securities in a continuous unrealized loss position total | security	60	30
Fair value of securities in a continuous unrealized loss position total	$ 573,594	$ 193,736
Unrealized losses of securities in a continuous unrealized loss position total	$ (16,383)	$ (2,569)
Obligations of U.S. government-sponsored enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Number of securities in a continuous unrealized loss position for less than 12 months | security	12	6
Fair value of securities in a continuous unrealized loss position for less than 12 months	$ 135,278	$ 63,856
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	$ (4,622)	$ (145)
Number of securities in a continuous unrealized loss position for 12 months or longer | security	0	0
Fair value of securities in a continuous unrealized loss position for 12 months or longer	$ 0	$ 0
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	$ 0	$ 0
Number of securities in a continuous unrealized loss position total | security	12	6
Fair value of securities in a continuous unrealized loss position total	$ 135,278	$ 63,856
Unrealized losses of securities in a continuous unrealized loss position total	$ (4,622)	$ (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]
Number of securities in a continuous unrealized loss position for less than 12 months | security	40	16
Fair value of securities in a continuous unrealized loss position for less than 12 months	$ 415,160	$ 107,283
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	$ (10,416)	$ (527)
Number of securities in a continuous unrealized loss position for 12 months or longer | security	0	0
Fair value of securities in a continuous unrealized loss position for 12 months or longer	$ 0	$ 0
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	$ 0	$ 0
Number of securities in a continuous unrealized loss position total | security	40	16
Fair value of securities in a continuous unrealized loss position total	$ 415,160	$ 107,283
Unrealized losses of securities in a continuous unrealized loss position total	$ (10,416)	$ (527)
Individual name issuer trust preferred debt securities
Debt Securities, Available-for-sale [Line Items]
Number of securities in a continuous unrealized loss position for less than 12 months | security	0	0
Fair value of securities in a continuous unrealized loss position for less than 12 months	$ 0	$ 0
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	$ 0	$ 0
Number of securities in a continuous unrealized loss position for 12 months or longer | security	5	5
Fair value of securities in a continuous unrealized loss position for 12 months or longer	$ 12,908	$ 12,669
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	$ (437)	$ (672)
Number of securities in a continuous unrealized loss position total | security	5	5
Fair value of securities in a continuous unrealized loss position total	$ 12,908	$ 12,669
Unrealized losses of securities in a continuous unrealized loss position total	$ (437)	$ (672)
Corporate bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Number of securities in a continuous unrealized loss position for less than 12 months | security	0	0
Fair value of securities in a continuous unrealized loss position for less than 12 months	$ 0	$ 0
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	$ 0	$ 0
Number of securities in a continuous unrealized loss position for 12 months or longer | security	3	3
Fair value of securities in a continuous unrealized loss position for 12 months or longer	$ 10,248	$ 9,928
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	$ (908)	$ (1,225)
Number of securities in a continuous unrealized loss position total | security	3	3
Fair value of securities in a continuous unrealized loss position total	$ 10,248	$ 9,928
Unrealized losses of securities in a continuous unrealized loss position total	$ (908)	$ (1,225)

Loans (Narrative) (Details)

Loans (Narrative) (Details) $ in Thousands		Mar. 31, 2021USD ($)loansecurity	Dec. 31, 2020USD ($)
Carrying value of PPP loans		$ 228,600	$ 199,800
Loans Receivable Net Deferred Cost Originated		(223)	1,500
Loans Receivable Net Deferred Premium on Purchased Loans		653	787
Accrued interest receivable on loans		11,800	11,300
Loans pledged as collateral		$ 2,100,000	2,100,000
Number of executed loan modifications due to COVID-19 | security		652
Balance of executed loan modifications due to COVID-19		$ 727,000
Number of active deferrals due to COVID-19 | loan		88
Balance of active deferments due to COVID-19		$ 191,400
Past due loans included in nonaccrual loans		8,400	8,500
Nonaccrual loans with no ACL		4,300	3,000
Residential loans in process of foreclosure		3,100	3,400
Nonaccrual loans current on payment		4,600	4,700
Individually analyzed loans		16,800	18,300
Collateral dependent loans	[1]	$ 4,194,666	4,195,990
Active deferments as % of total loans excl PPP loans		5.00%
Collateral Dependent Individually Analyzed
Collateral dependent loans		$ 6,942	$ 8,444
[1]	Includes net unamortized loan origination fees of $223 thousand at March 31, 2021 and net unamortized loan origination costs of $1.5 million, at December 31, 2020 and net unamortized premiums on purchased loans of $653 thousand and $787 thousand, respectively, at March 31, 2021 and December 31, 2020.

Loans (Summary of Loans) (Detai

Loans (Summary of Loans) (Details) - USD ($) $ in Thousands		Mar. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	[1]	$ 4,194,666	$ 4,195,990
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	[2]	1,618,540	1,633,024
Commercial & Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	[3]	840,585	817,408
Total Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		2,459,125	2,450,432
Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	[4]	1,457,490	1,467,312
Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		256,799	259,185
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	[5]	21,252	19,061
Total Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		$ 278,051	$ 278,246
[1]	Includes net unamortized loan origination fees of $223 thousand at March 31, 2021 and net unamortized loan origination costs of $1.5 million, at December 31, 2020 and net unamortized premiums on purchased loans of $653 thousand and $787 thousand, respectively, at March 31, 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 $228.6 million and $199.8 million, respectively, of PPP loans as of March 31, 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		Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Past due		$ 10,912	$ 12,392
Current		4,183,754	4,183,598
Total loans	[1]	4,194,666	4,195,990
30-59
Financing Receivable, Past Due [Line Items]
Past due		3,762	5,649
60-89
Financing Receivable, Past Due [Line Items]
Past due		890	839
Over 90
Financing Receivable, Past Due [Line Items]
Past due		6,260	5,904
Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Past due		0	265
Current		1,618,540	1,632,759
Total loans	[2]	1,618,540	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		1	3
Current		840,584	817,405
Total loans	[3]	840,585	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		0	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		1	268
Current		2,459,124	2,450,164
Total loans		2,459,125	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		0	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		9,661	10,339
Current		1,447,829	1,456,973
Total loans	[4]	1,457,490	1,467,312
Residential Real Estate | 30-59
Financing Receivable, Past Due [Line Items]
Past due		3,156	4,466
Residential Real Estate | 60-89
Financing Receivable, Past Due [Line Items]
Past due		819	701
Residential Real Estate | Over 90
Financing Receivable, Past Due [Line Items]
Past due		5,686	5,172
Home Equity
Financing Receivable, Past Due [Line Items]
Past due		1,131	1,667
Current		255,668	257,518
Total loans		256,799	259,185
Home Equity | 30-59
Financing Receivable, Past Due [Line Items]
Past due		577	894
Home Equity | 60-89
Financing Receivable, Past Due [Line Items]
Past due		68	129
Home Equity | Over 90
Financing Receivable, Past Due [Line Items]
Past due		486	644
Other
Financing Receivable, Past Due [Line Items]
Past due		119	118
Current		21,133	18,943
Total loans	[5]	21,252	19,061
Other | 30-59
Financing Receivable, Past Due [Line Items]
Past due		28	23
Other | 60-89
Financing Receivable, Past Due [Line Items]
Past due		3	7
Other | Over 90
Financing Receivable, Past Due [Line Items]
Past due		88	88
Total Consumer
Financing Receivable, Past Due [Line Items]
Past due		1,250	1,785
Current		276,801	276,461
Total loans		278,051	278,246
Total Consumer | 30-59
Financing Receivable, Past Due [Line Items]
Past due		605	917
Total Consumer | 60-89
Financing Receivable, Past Due [Line Items]
Past due		71	136
Total Consumer | Over 90
Financing Receivable, Past Due [Line Items]
Past due		$ 574	$ 732
[1]	Includes net unamortized loan origination fees of $223 thousand at March 31, 2021 and net unamortized loan origination costs of $1.5 million, at December 31, 2020 and net unamortized premiums on purchased loans of $653 thousand and $787 thousand, respectively, at March 31, 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 $228.6 million and $199.8 million, respectively, of PPP loans as of March 31, 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	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	$ 12,983	$ 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	11,748	11,981
Home Equity
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	1,147	1,128
Other
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	88	88
Total Consumer
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	$ 1,235	$ 1,216

Loans (Interest Income on Nonac

Loans (Interest Income on Nonaccrual Loans) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Interest income on nonaccrual loans	$ 90	$ 191
Commercial Real Estate
Interest income on nonaccrual loans	0	0
Commercial & Industrial
Interest income on nonaccrual loans	1	0
Total Commercial
Interest income on nonaccrual loans	1	0
Residential Real Estate
Interest income on nonaccrual loans	65	168
Home Equity
Interest income on nonaccrual loans	24	23
Other
Interest income on nonaccrual loans	0	0
Total Consumer
Interest income on nonaccrual loans	$ 24	$ 23

Loans (Troubled Debt Restructur

Loans (Troubled Debt Restructurings) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021USD ($)	Mar. 31, 2020	Dec. 31, 2020USD ($)
Number of loans modified as a troubled debt restructuring	0	0
TDRs, Recorded Investment	$ 14,378		$ 15,763
Specific Reserves on Troubled Debt Restructurings	161		159
TDRs, Commitment to Lend	0		0
Performing Financial Instruments
TDRs, Recorded Investment	12,443		13,418
Nonperforming Financial Instruments
TDRs, Recorded Investment	$ 1,935		$ 2,345

Loans (Troubled Debt Restruct_2

Loans (Troubled Debt Restructurings Subsequent Default) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021USD ($)loan	Mar. 31, 2020USD ($)loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans modified as a troubled debt restructuring	0	0
Payment Default [Member] | Residential Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans modified as a troubled debt restructuring | loan	1	0
TDR, subsequent default | $	$ 396	$ 0

Loans (Collateral Dependent Ind

Loans (Collateral Dependent Individually Analyzed Loans) (Details) - USD ($) $ in Thousands		Mar. 31, 2021		Dec. 31, 2020
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans	[1]	$ 4,194,666		$ 4,195,990
Collateral Dependent Individually Analyzed
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans		6,942		8,444
Related allowance		183		221
Commercial Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans	[2]	1,618,540		1,633,024
Commercial Real Estate | Collateral Dependent Individually Analyzed
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans		958	[3]	1,792
Related allowance		0	[3]	0
Commercial & Industrial
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans	[4]	840,585		817,408
Commercial & Industrial | Collateral Dependent Individually Analyzed
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans		398	[5]	451
Related allowance		0	[5]	0
Total Commercial
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans		2,459,125		2,450,432
Total Commercial | Collateral Dependent Individually Analyzed
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans		1,356		2,243
Related allowance		0		0
Residential Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans	[6]	1,457,490		1,467,312
Residential Real Estate | Collateral Dependent Individually Analyzed
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans		5,332	[7]	5,947
Related allowance		0	[7]	38
Home Equity
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans		256,799		259,185
Home Equity | Collateral Dependent Individually Analyzed
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans		254	[7]	254
Related allowance		183	[7]	183
Other
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans	[8]	21,252		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		278,051		278,246
Total Consumer | Collateral Dependent Individually Analyzed
Loans and Leases Receivable Disclosure [Line Items]
Collateral dependent loans		254		254
Related allowance		$ 183		$ 183
[1]	Includes net unamortized loan origination fees of $223 thousand at March 31, 2021 and net unamortized loan origination costs of $1.5 million, at December 31, 2020 and net unamortized premiums on purchased loans of $653 thousand and $787 thousand, respectively, at March 31, 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 $228.6 million and $199.8 million, respectively, of PPP loans as of March 31, 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	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	$ 279,628	$ 1,058,859
Term loans amortized cost, prior year	973,956	734,581
Term loans amortized cost, two years ago	701,571	554,968
Term loans amortized cost, three years ago	497,658	476,043
Term loans amortized cost, four years ago	431,071	325,496
Term loans amortized cost, five years ago or more	967,209	699,479
Revolving loans amortized cost	328,623	330,433
Revolving loans converted to term loans	14,950	16,131
Total	4,194,666	4,195,990
Commercial Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	54,899	285,054
Term loans amortized cost, prior year	286,378	374,110
Term loans amortized cost, two years ago	369,807	300,304
Term loans amortized cost, three years ago	263,390	252,532
Term loans amortized cost, four years ago	235,088	147,808
Term loans amortized cost, five years ago or more	398,124	259,726
Revolving loans amortized cost	8,494	11,104
Revolving loans converted to term loans	2,360	2,386
Total	1,618,540	1,633,024
Commercial Real Estate | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	54,899	283,341
Term loans amortized cost, prior year	284,731	353,875
Term loans amortized cost, two years ago	340,081	260,917
Term loans amortized cost, three years ago	223,920	236,310
Term loans amortized cost, four years ago	218,914	136,490
Term loans amortized cost, five years ago or more	374,800	249,359
Revolving loans amortized cost	7,767	10,333
Revolving loans converted to term loans	2,360	2,386
Total	1,507,472	1,533,011
Commercial Real Estate | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	0	756
Term loans amortized cost, prior year	689	20,235
Term loans amortized cost, two years ago	29,726	39,387
Term loans amortized cost, three years ago	39,470	16,222
Term loans amortized cost, four years ago	16,174	11,318
Term loans amortized cost, five years ago or more	23,324	10,367
Revolving loans amortized cost	727	771
Revolving loans converted to term loans	0	0
Total	110,110	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	958	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	958	957
Commercial & Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	99,420	295,019
Term loans amortized cost, prior year	235,011	96,497
Term loans amortized cost, two years ago	94,587	101,356
Term loans amortized cost, three years ago	99,970	63,631
Term loans amortized cost, four years ago	61,703	47,586
Term loans amortized cost, five years ago or more	148,001	112,344
Revolving loans amortized cost	100,656	99,623
Revolving loans converted to term loans	1,237	1,352
Total	840,585	817,408
Commercial & Industrial | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	99,420	293,493
Term loans amortized cost, prior year	233,508	95,775
Term loans amortized cost, two years ago	93,874	98,146
Term loans amortized cost, three years ago	95,248	56,792
Term loans amortized cost, four years ago	55,001	44,445
Term loans amortized cost, five years ago or more	128,130	91,128
Revolving loans amortized cost	96,981	95,817
Revolving loans converted to term loans	1,237	1,296
Total	803,399	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	1,105	722
Term loans amortized cost, two years ago	713	3,210
Term loans amortized cost, three years ago	4,722	6,839
Term loans amortized cost, four years ago	6,702	3,141
Term loans amortized cost, five years ago or more	13,508	14,853
Revolving loans amortized cost	3,675	3,806
Revolving loans converted to term loans	0	56
Total	30,425	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	398	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	6,363	6,363
Revolving loans amortized cost	0	0
Revolving loans converted to term loans	0	0
Total	6,761	6,766
Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	119,706	463,715
Term loans amortized cost, prior year	438,727	254,926
Term loans amortized cost, two years ago	229,276	148,149
Term loans amortized cost, three years ago	129,592	156,862
Term loans amortized cost, four years ago	131,562	128,249
Term loans amortized cost, five years ago or more	408,627	315,411
Revolving loans amortized cost	0	0
Revolving loans converted to term loans	0	0
Total	1,457,490	1,467,312
Residential Real Estate | Current [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	119,706	463,477
Term loans amortized cost, prior year	438,489	253,228
Term loans amortized cost, two years ago	227,838	146,839
Term loans amortized cost, three years ago	128,283	155,976
Term loans amortized cost, four years ago	130,769	128,139
Term loans amortized cost, five years ago or more	402,744	309,314
Revolving loans amortized cost	0	0
Revolving loans converted to term loans	0	0
Total	1,447,829	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	238	1,698
Term loans amortized cost, two years ago	1,438	1,310
Term loans amortized cost, three years ago	1,309	886
Term loans amortized cost, four years ago	793	110
Term loans amortized cost, five years ago or more	5,883	6,097
Revolving loans amortized cost	0	0
Revolving loans converted to term loans	0	0
Total	9,661	10,339
Home Equity
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	1,791	9,838
Term loans amortized cost, prior year	8,710	6,806
Term loans amortized cost, two years ago	6,097	3,922
Term loans amortized cost, three years ago	3,559	1,474
Term loans amortized cost, four years ago	1,222	1,217
Term loans amortized cost, five years ago or more	4,855	4,141
Revolving loans amortized cost	219,213	219,395
Revolving loans converted to term loans	11,352	12,392
Total	256,799	259,185
Home Equity | Current [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	1,791	9,838
Term loans amortized cost, prior year	8,710	6,771
Term loans amortized cost, two years ago	6,097	3,898
Term loans amortized cost, three years ago	3,535	1,474
Term loans amortized cost, four years ago	1,222	1,217
Term loans amortized cost, five years ago or more	4,787	3,955
Revolving loans amortized cost	219,028	219,085
Revolving loans converted to term loans	10,498	11,280
Total	255,668	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	24	0
Term loans amortized cost, four years ago	0	0
Term loans amortized cost, five years ago or more	68	186
Revolving loans amortized cost	185	310
Revolving loans converted to term loans	854	1,112
Total	1,131	1,667
Other
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	3,812	5,233
Term loans amortized cost, prior year	5,130	2,242
Term loans amortized cost, two years ago	1,804	1,237
Term loans amortized cost, three years ago	1,147	1,544
Term loans amortized cost, four years ago	1,496	636
Term loans amortized cost, five years ago or more	7,602	7,857
Revolving loans amortized cost	260	311
Revolving loans converted to term loans	1	1
Total	21,252	19,061
Other | Current [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	3,799	5,214
Term loans amortized cost, prior year	5,119	2,241
Term loans amortized cost, two years ago	1,804	1,237
Term loans amortized cost, three years ago	1,147	1,544
Term loans amortized cost, four years ago	1,489	548
Term loans amortized cost, five years ago or more	7,514	7,850
Revolving loans amortized cost	260	308
Revolving loans converted to term loans	1	1
Total	21,133	18,943
Other | Past Due [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year	13	19
Term loans amortized cost, prior year	11	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	7	88
Term loans amortized cost, five years ago or more	88	7
Revolving loans amortized cost	0	3
Revolving loans converted to term loans	0	0
Total	$ 119	$ 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
	Mar. 31, 2021	Mar. 31, 2020	Jan. 01, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance, Beginning Balance	$ 44,106	$ 27,014
Adoption of Topic 326			$ 6,501
Charge-offs	(64)	(635)
Recoveries	46	12
Provision	(1,951)	6,773
Allowance, Ending Balance	42,137	39,665
Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance, Beginning Balance	22,065	14,741
Adoption of Topic 326			3,405
Charge-offs	0	(153)
Recoveries	0	0
Provision	(768)	1,743
Allowance, Ending Balance	21,297	19,736
Commercial & Industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance, Beginning Balance	12,228	3,921
Adoption of Topic 326			3,029
Charge-offs	(3)	(294)
Recoveries	2	4
Provision	162	3,671
Allowance, Ending Balance	12,389	10,331
Total Commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance, Beginning Balance	34,293	18,662
Adoption of Topic 326			6,434
Charge-offs	(3)	(447)
Recoveries	2	4
Provision	(606)	5,414
Allowance, Ending Balance	33,686	30,067
Residential Real Estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance, Beginning Balance	8,042	6,615
Adoption of Topic 326			221
Charge-offs	(50)	0
Recoveries	33	0
Provision	(1,556)	893
Allowance, Ending Balance	6,469	7,729
Home Equity
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance, Beginning Balance	1,300	1,390
Adoption of Topic 326			(106)
Charge-offs	0	(173)
Recoveries	2	1
Provision	129	323
Allowance, Ending Balance	1,431	1,435
Other
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance, Beginning Balance	471	347
Adoption of Topic 326			(48)
Charge-offs	(11)	(15)
Recoveries	9	7
Provision	82	143
Allowance, Ending Balance	551	434
Total Consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance, Beginning Balance	1,771	1,737
Adoption of Topic 326			$ (154)
Charge-offs	(11)	(188)
Recoveries	11	8
Provision	211	466
Allowance, Ending Balance	$ 1,982	$ 1,869

Leases (Narrative) (Details)

Leases (Narrative) (Details) $ in Thousands		3 Months Ended
		Mar. 31, 2021USD ($)		Mar. 31, 2020USD ($)	Dec. 31, 2020USD ($)
Number of operating leases not yet commenced		0			0
Operating lease rent expense	[1]	$ 1,020		$ 964
Options to extend reasonably certain of being exercised	[2],[3]	2,100
Short-term operating lease liabilities		2,900
Operating lease right-of-use assets		28,761			$ 29,521
Operating lease liabilities		$ 30,974	[3]		$ 31,717
[1]	Included in net occupancy expenses in the Unaudited Consolidated Income Statement.
[2]	Includes $2.1 million related to options to extend lease terms that are reasonably certain of being exercised.
[3]	Includes short-term operating lease liabilities of $2.9 million.

Leases Leases (Schedule of Cert

Leases Leases (Schedule of Certain Lease Terms) (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Weighted average discount rate	3.35%	3.34%
Weighted average remaining lease term	13 years 2 months 12 days	13 years 4 months 24 days
Minimum [Member]
Lease Expiration Period	4 months	7 months
Range of lease renewal options	1 year	1 year
Maximum [Member]
Lease Expiration Period	20 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		Mar. 31, 2021		Dec. 31, 2020
Leases [Abstract]
Operating lease minimum payments, Due Current Year		$ 2,932
Operating lease minimum payments, Due Year Two		3,889
Operating lease minimum payments, Due Year Three		3,828
Operating lease minimum payments, Due Year Four		3,617
Operating lease minimum payments, Due Year Five		2,879
Operating lease minimum payments, Due after Year Five		22,046
Total operating lease payments	[1]	39,191
Interest		8,217
Present value of operating lease liabilities		$ 30,974	[2]	$ 31,717
[1]	Includes $2.1 million related to options to extend lease terms that are reasonably certain of being exercised.
[2]	Includes short-term operating lease liabilities of $2.9 million.

Leases (Lease Cost and Cash Pai

Leases (Lease Cost and Cash Paid) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Leases [Abstract]
Operating lease expense		$ 1,005	$ 951
Variable lease expense		15	13
Total lease expense	[1]	1,020	964
Cash paid reducing operating lease liabilities		$ 989	$ 934
[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	Mar. 31, 2021	Dec. 31, 2020
Federal Home Loan Bank, Advances, Branch of FHLBB Bank [Line Items]
Federal Home Loan Bank advances	$ 466,912	$ 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	466,912	593,900
Unused line of credit with FHLBB	40,000	40,000
Unused remaining available borrowing capacity with FHLBB	$ 1,000,000	$ 969,700

Federal Home Loan Bank Advanc_4

Federal Home Loan Bank Advances (Federal Home Loan Bank Advances Maturity Schedule) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Federal Home Loan Bank, Advances, Branch of FHLBB Bank [Line Items]
Federal Home Loan Bank advances	$ 466,912	$ 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	$ 416,787
Weighted average rate for scheduled maturity through the end of the current year	0.41%
Scheduled maturity in year two	$ 471
Weighted average rate for scheduled maturity in year two	4.96%
Scheduled maturity in year three	$ 495
Weighted average rate for scheduled maturity in year three	4.96%
Scheduled maturity in year four	$ 35,519
Weighted average rate for scheduled maturity in year four	2.49%
Scheduled maturity in year five	$ 2,349
Weighted average rate for scheduled maturity in year five	4.98%
Scheduled maturity after year five	$ 11,291
Weighted average rate for scheduled maturity after year five	3.25%
Federal Home Loan Bank advances	$ 466,912	$ 593,900
Total weighted average rate	0.67%

Shareholders' Equity (Narrative

Shareholders' Equity (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 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		Mar. 31, 2021USD ($)	Dec. 31, 2020USD ($)
Corporation [Member]
Total Capital (to Risk-Weighted Assets):
Total Capital		$ 549,669	$ 539,496
Total Capital to Risk-Weighted Assets		0.1385	0.1351
Total Capital for Capital Adequacy Purposes		$ 317,554	$ 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		$ 515,478	$ 503,791
Tier 1 Capital to Risk Weighted-Assets		0.1299	0.1261
Tier 1 Capital Required For Capital Adequacy Purposes		$ 238,165	$ 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		$ 493,479	$ 481,792
Common Equity Tier 1 Capital to Risk-Weighted Assets		0.1243	0.1206
Common Equity Tier 1 Capital Required for Capital Adequacy		$ 178,624	$ 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]	$ 515,478	$ 503,791
Tier 1 Leverage Capital to Average Assets	[1]	0.0911	0.0895
Tier 1 Leverage Capital Required for Capital Adequacy Purposes	[1]	$ 226,336	$ 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		$ 544,695	$ 534,288
Total Capital to Risk-Weighted Assets		0.1372	0.1338
Total Capital for Capital Adequacy Purposes		$ 317,526	$ 319,503
Total Capital for Capital Adequacy Purposes to Risk-Weighted Assets		0.0800	0.0800
Total Capital To Be Well Capitalized		$ 396,907	$ 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		$ 510,504	$ 498,583
Tier 1 Capital to Risk Weighted-Assets		0.1286	0.1248
Tier 1 Capital Required For Capital Adequacy Purposes		$ 238,144	$ 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		$ 317,526	$ 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		$ 510,504	$ 498,583
Common Equity Tier 1 Capital to Risk-Weighted Assets		0.1286	0.1248
Common Equity Tier 1 Capital Required for Capital Adequacy		$ 178,608	$ 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		$ 257,990	$ 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]	$ 510,504	$ 498,583
Tier 1 Leverage Capital to Average Assets	[1]	0.0903	0.0886
Tier 1 Leverage Capital Required for Capital Adequacy Purposes	[1]	$ 226,255	$ 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]	$ 282,819	$ 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) $ in Thousands	Mar. 31, 2021USD ($)derivative_instrument	Dec. 31, 2020USD ($)derivative_instrument
Interest rate swaps [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	$ 60,000	$ 60,000
Interest rate swaps with customers [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	983,619	991,002
Mirror swaps with counterparties [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	983,619	991,002
Risk participation-in agreement [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	107,493	92,717
Interest rate lock commitments [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	155,800	167,671
Forward sale commitments [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	290,989	279,653
Derivatives Designated as Cash Flow Hedging Instruments [Member] | Interest rate swaps [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	$ 60,000	$ 60,000
Number of instruments held | derivative_instrument	2	2
Not Designated as Hedging Instrument [Member] | Interest rate swaps with customers [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	$ 983,600	$ 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	983,600	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	62,000	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	$ 107,500	$ 92,700

Derivative Financial Instrume_4

Derivative Financial Instruments (Fair Value of Derivatives by Balance Sheet Location) (Details) - USD ($) $ in Thousands		Mar. 31, 2021	Dec. 31, 2020
Derivative Financial Instruments, Assets [Member]
Derivatives, Fair Value [Line Items]
Gross derivative asset positions		$ 54,200	$ 83,095
Amounts offset in balance sheet	[1]	3,495	67
Net amounts presented in balance sheet		50,705	83,028
Collateral pledged	[2]	0	0
Net amounts		50,705	83,028
Derivative Financial Instruments, Liabilities [Member]
Derivatives, Fair Value [Line Items]
Gross derivative liability positions		50,830	81,190
Amounts offset in balance sheet	[1]	3,495	67
Net amounts presented in balance sheet		47,335	81,123
Collateral pledged	[2]	39,945	74,698
Net amounts		7,390	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		0	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		1,569	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		44,732	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		3,589	68
Not Designated as Hedging Instrument [Member] | Mirror swaps with counterparties [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets not designated		3,497	67
Not Designated as Hedging Instrument [Member] | Mirror swaps with counterparties [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities not designated		44,903	76,248
Not Designated as Hedging Instrument [Member] | Risk participation agreements [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets not designated		2	22
Not Designated as Hedging Instrument [Member] | Risk participation agreements [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities not designated		1	2
Not Designated as Hedging Instrument [Member] | Interest rate lock commitments [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets not designated		2,776	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		102	0
Not Designated as Hedging Instrument [Member] | Forward sale commitments [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets not designated		3,193	0
Not Designated as Hedging Instrument [Member] | Forward sale commitments [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities not designated		$ 666	$ 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
	Mar. 31, 2021	Mar. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Net change in fair value of cash flow hedges	$ 297	$ (1,050)
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	0	22
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	297	(1,325)
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	$ 0	$ 253

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
	Mar. 31, 2021	Mar. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	$ 3,223	$ 2,557
Interest rate swaps with customers [Member] | Loan related derivative income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	(30,231)	58,531
Mirror swaps with counterparties [Member] | Loan related derivative income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	30,683	(56,190)
Risk participation agreements [Member] | Loan related derivative income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	15	114
Interest rate lock commitments [Member] | Mortgage banking revenues [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	(4,529)	3,736
Forward sale commitments [Member] | Mortgage banking revenues [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	$ 7,285	$ (3,634)

Fair Value Measurements (Fair V

Fair Value Measurements (Fair Value Mortgage Loans Held For Sale Disclosures) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Mortgage loans held for sale, measured at fair value	$ 77,450		$ 61,614
Mortgage loans held for sale, amortized cost	76,619		59,313
Mortgage loans held for sale, difference between fair value and amortized cost	831		$ 2,301
Mortgage Loans Held for Sale [Member]
Change in fair value under fair value option election	$ (1,500)	$ 887

Fair Value Measurements (Assets

Fair Value Measurements (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	$ 948,094	$ 894,571
Mortgage loans held for sale, measured at fair value	77,450	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, at fair value	181,951	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, at fair value	742,987	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, at fair value	12,908	12,669
Corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	10,248	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	77,450	61,614
Derivative assets	50,705	83,028
Total assets at fair value on a recurring basis	1,076,249	1,039,213
Derivative liabilities	47,335	81,123
Total liabilities at fair value on a recurring basis	47,335	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, at fair value	181,951	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, at fair value	742,987	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, at fair value	12,908	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, at fair value	10,248	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, at fair value	0	0
Recurring [Member] | Level 1 [Member] | Mortgage-backed securities issued by U.S. government-sponsored agencies and U.S. government-sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	0	0
Recurring [Member] | Level 1 [Member] | Individual name issuer trust preferred debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	0	0
Recurring [Member] | Level 1 [Member] | Corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	0	0
Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale, measured at fair value	77,450	61,614
Derivative assets	50,705	83,028
Total assets at fair value on a recurring basis	1,076,249	1,039,213
Derivative liabilities	47,335	81,123
Total liabilities at fair value on a recurring basis	47,335	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, at fair value	181,951	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, at fair value	742,987	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, at fair value	12,908	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, at fair value	10,248	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, at fair value	0	0
Recurring [Member] | Level 3 [Member] | Mortgage-backed securities issued by U.S. government-sponsored agencies and U.S. government-sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	0	0
Recurring [Member] | Level 3 [Member] | Individual name issuer trust preferred debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	0	0
Recurring [Member] | Level 3 [Member] | Corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, at fair value	0	0
Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value on a recurring basis	944	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	$ 944	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	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent individually analyzed loans	$ 944	$ 1,720
Loan servicing rights		7,434
Total assets at fair value on a nonrecurring basis	944	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	944	1,720
Loan servicing rights		7,434
Total assets at fair value on a nonrecurring basis	$ 944	$ 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	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Collateral dependent individually analyzed loans	$ 944	$ 1,720
Loan servicing rights		7,434
Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Collateral dependent individually analyzed loans	$ 944	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	10.00%	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	10.00%	25.00%
Appraisal adjustments	0.00%	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	10.00%	11.00%
Appraisal adjustments	0.00%	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	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans, net of allowance for credit losses on loans	$ 4,152,529	$ 4,151,884
Federal Home Loan Bank advances	466,912	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	4,152,529	4,151,884
Time deposits	1,237,024	1,296,396
Federal Home Loan Bank advances	466,912	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	4,087,720	4,114,628
Time deposits	1,241,936	1,302,128
Federal Home Loan Bank advances	470,727	602,000
Junior subordinated debentures	19,805	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	1,241,936	1,302,128
Federal Home Loan Bank advances	470,727	602,000
Junior subordinated debentures	19,805	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	4,087,720	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 Thousands	Mar. 31, 2021	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Receivables from contracts with customers	$ 5,200	$ 4,800
Contract cost assets	$ 1,400	$ 1,500

Revenue from Contracts with C_4

Revenue from Contracts with Customers (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Net interest income	[1]	$ 32,871	$ 32,602
Asset-based wealth management revenues	[1]	9,583	8,355
Transaction-based wealth management revenues	[1]	312	334
Wealth management revenues	[1]	9,895	8,689
Mortgage banking revenues	[1]	11,927	6,096
Card interchange fees	[1]	1,133	947
Service charges on deposit accounts	[1]	609	860
Loan related derivative income	[1]	467	2,455
Income from bank-owned life insurance	[1]	556	564
Other income	[1]	1,387	316
Total noninterest income	[1]	25,974	19,927
Total revenues	[1]	58,845	52,529
Revenue from contracts in scope of Topic 606		12,882	10,743
Net Interest Income
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	[2]	0	0
Asset-based Wealth Management Revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	[2]	9,583	8,355
Transaction-based Wealth Management Revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	[2]	312	334
Total Wealth Management Revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	[2]	9,895	8,689
Mortgage Banking Revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	[2]	0	0
Card Interchange Fees
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	[2]	1,133	947
Service Charges on Deposit Accounts
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	[2]	609	860
Loan Related Derivative Income
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	[2]	0	0
Income From Bank-owned Life Insurance
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	[2]	0	0
Other Income
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	[2]	1,245	247
Total Noninterest Income
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	[2]	12,882	10,743
Total Revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts in scope of Topic 606	[2]	$ 12,882	$ 10,743
[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
		Mar. 31, 2021	Mar. 31, 2020
Revenue from contracts in scope of Topic 606		$ 12,882	$ 10,743
Wealth Management Revenues
Revenue from contracts in scope of Topic 606	[1]	9,895	8,689
Wealth Management Revenues | Transferred over Time [Member]
Revenue from contracts in scope of Topic 606		9,895	8,689
Card Interchange Fees
Revenue from contracts in scope of Topic 606	[1]	1,133	947
Card Interchange Fees | Transferred at Point in Time [Member]
Revenue from contracts in scope of Topic 606		1,133	947
Service Charges on Deposit Accounts
Revenue from contracts in scope of Topic 606	[1]	609	860
Service Charges on Deposit Accounts | Transferred at Point in Time [Member]
Revenue from contracts in scope of Topic 606		481	667
Service Charges on Deposit Accounts | Transferred over Time [Member]
Revenue from contracts in scope of Topic 606		128	193
Other Income
Revenue from contracts in scope of Topic 606	[1]	1,245	247
Other Income | Transferred at Point in Time [Member]
Revenue from contracts in scope of Topic 606		1,203	200
Other Income | Transferred over Time [Member]
Revenue from contracts in scope of Topic 606		$ 42	$ 47
[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
		Mar. 31, 2021	Mar. 31, 2020
Qualified Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	[1]	$ 592	$ 541
Interest cost	[2]	645	626
Expected return on plan assets	[2]	(1,204)	(1,135)
Recognized net actuarial loss	[2]	387	396
Net periodic benefit cost		420	428
Non-Qualified Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	[1]	52	43
Interest cost	[2]	84	116
Expected return on plan assets	[2]	0	0
Recognized net actuarial loss	[2]	158	140
Net periodic benefit cost		$ 294	$ 299
[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)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 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)	3 Months Ended
	Mar. 31, 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	1,760
Nonvested share units weighted average grant date fair value | $ / shares	$ 46.15

Business Segments (Statement of

Business Segments (Statement of Operations and Total Assets by Reportable Segment) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Net interest income (expense)	[1]	$ 32,871	$ 32,602
Provision for credit losses		(2,000)	7,036
Net interest income after provision for credit losses		34,871	25,566
Noninterest income	[1]	25,974	19,927
Depreciation and amortization expense		1,054	1,013
Other noninterest expenses related to segments		33,659	29,440
Total noninterest expense		34,713	30,453
Income before income taxes		26,132	15,040
Income tax expense		5,661	3,139
Net income		20,471	11,901
Total assets		5,719,389	5,620,979	$ 5,713,169
Expenditures for long-lived assets		911	628
Commercial Banking [Member]
Segment Reporting Information [Line Items]
Net interest income (expense)		34,520	29,009
Provision for credit losses		(2,000)	7,036
Net interest income after provision for credit losses		36,520	21,973
Noninterest income		14,515	10,665
Depreciation and amortization expense		657	619
Other noninterest expenses related to segments		20,001	18,842
Total noninterest expense		20,658	19,461
Income before income taxes		30,377	13,177
Income tax expense		6,592	2,764
Net income		23,785	10,413
Total assets		4,491,675	4,367,469
Expenditures for long-lived assets		835	526
Wealth Management Services [Member]
Segment Reporting Information [Line Items]
Net interest income (expense)		(23)	(67)
Provision for credit losses		0	0
Net interest income after provision for credit losses		(23)	(67)
Noninterest income		10,895	8,689
Depreciation and amortization expense		351	354
Other noninterest expenses related to segments		6,386	6,846
Total noninterest expense		6,737	7,200
Income before income taxes		4,135	1,422
Income tax expense		954	356
Net income		3,181	1,066
Total assets		74,902	74,283
Expenditures for long-lived assets		58	53
Corporate [Member]
Segment Reporting Information [Line Items]
Net interest income (expense)		(1,626)	3,660
Provision for credit losses		0	0
Net interest income after provision for credit losses		(1,626)	3,660
Noninterest income		564	573
Depreciation and amortization expense		46	40
Other noninterest expenses related to segments		7,272	3,752
Total noninterest expense		7,318	3,792
Income before income taxes		(8,380)	441
Income tax expense		(1,885)	19
Net income		(6,495)	422
Total assets		1,152,812	1,179,227
Expenditures for long-lived assets		$ 18	$ 49
[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
		Mar. 31, 2021		Mar. 31, 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		$ (17,525)		$ 16,740
Changes in fair value of available for sale debt securities, tax		(4,206)		3,934
Changes in fair value of available for sale debt securities		(13,319)		12,806
Change in fair value of cash flow hedges, before tax		109		(1,402)
Change in fair value of cash flow hedges, tax		26		(330)
Change in fair value of cash flow hedges		83		(1,072)
Net cash flow hedge losses reclassified into earnings, before tax		281	[1]	29	[2]
Net cash flow hedge losses reclassified into earnings, tax		67	[1]	7	[2]
Net cash flow hedge losses reclassified into earnings		214	[1]	22	[2]
Net change in fair value of cash flow hedges, before tax		390		(1,373)
Net change in fair value of cash flow hedges, tax		93		(323)
Net change in fair value of cash flow hedges		297		(1,050)
Amortization of net actuarial losses, before tax	[3]	545		536
Amortization of net actuarial losses, tax	[3]	138		126
Amortization of net actuarial losses	[3]	407		410
Total other comprehensive income (loss), before tax		(16,590)		15,903
Total other comprehensive income (loss), tax		(3,975)		3,737
Total other comprehensive income (loss), net of tax		$ (12,615)		$ 12,166
[1]	The pre-tax amounts for the three months ended March 31, 2021 are included in interest expense on FHLB advances.
[2]	The pre-tax amounts for the three months ended March 31, 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
	Mar. 31, 2021	Mar. 31, 2020
Accumulated other comprehensive income (loss), beginning balance	$ (7,391)
Total other comprehensive income (loss), net of tax	(12,615)	$ 12,166
Accumulated other comprehensive income (loss), ending balance	(20,006)
Net Unrealized Gains (Losses) on AFS Securities [Member]
Accumulated other comprehensive income (loss), beginning balance	9,881	3,226
Other comprehensive income (loss) before reclassifications	(13,319)	12,806
Amounts reclassed from accumulated other comprehensive income (loss)	0	0
Total other comprehensive income (loss), net of tax	(13,319)	12,806
Accumulated other comprehensive income (loss), ending balance	(3,438)	16,032
Net Unrealized Losses on Cash Flow Hedges [Member]
Accumulated other comprehensive income (loss), beginning balance	(1,447)	(793)
Other comprehensive income (loss) before reclassifications	83	(1,072)
Amounts reclassed from accumulated other comprehensive income (loss)	214	22
Total other comprehensive income (loss), net of tax	297	(1,050)
Accumulated other comprehensive income (loss), ending balance	(1,150)	(1,843)
Pension Benefit Adjustment [Member]
Accumulated other comprehensive income (loss), beginning balance	(15,825)	(13,670)
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassed from accumulated other comprehensive income (loss)	407	410
Total other comprehensive income (loss), net of tax	407	410
Accumulated other comprehensive income (loss), ending balance	(15,418)	(13,260)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated other comprehensive income (loss), beginning balance	(7,391)	(11,237)
Other comprehensive income (loss) before reclassifications	(13,236)	11,734
Amounts reclassed from accumulated other comprehensive income (loss)	621	432
Total other comprehensive income (loss), net of tax	(12,615)	12,166
Accumulated other comprehensive income (loss), ending balance	$ (20,006)	$ 929

Earning Per Common Share (Calcu

Earning Per Common Share (Calculation of Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Net income	$ 20,471	$ 11,901
Less dividends and undistributed earnings allocated to participating securities	(56)	(32)
Net income available to common shareholders	$ 20,415	$ 11,869
Weighted average common shares outstanding - basic	17,275,000	17,345,000
Basic earnings per common share	$ 1.18	$ 0.68
Less dividends and undistributed earnings allocated to participating securities	$ (56)	$ (32)
Net income available to common shareholders	$ 20,415	$ 11,869
Dilutive effect of common stock equivalents	156,000	96,000
Weighted average common shares outstanding - diluted	17,431,000	17,441,000
Diluted earnings per common share	$ 1.17	$ 0.68
Antidilutive common stock equivalents	149,575	152,010

Commitments and Contingencies_2

Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands	Mar. 31, 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	$ 11,570	$ 11,709

Commitments and Contingencies_3

Commitments and Contingencies (Financial Instruments with Off Balance Sheet Risk) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Interest rate lock commitments [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	$ 155,800	$ 167,671
Forward sale commitments [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	290,989	279,653
Interest rate swaps with customers [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	983,619	991,002
Mirror swaps with counterparties [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	983,619	991,002
Risk participation-in agreement [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	107,493	92,717
Interest rate swaps [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	60,000	60,000
Commitments to extend credit on commerical loans [Member] | Commitments to extend credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract amount	438,236	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	331,717	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	129,540	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	$ 11,570	$ 11,709

Commitments and Contingencies_4

Commitments and Contingencies (ACL on Unfunded Commitments Rollforward) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Jan. 01, 2020
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	$ 2,382	$ 293
Adoption of Topic 326			$ 1,483
Provision	(49)	263
Ending balance	2,333	2,039
Commercial Real Estate
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	907	136
Adoption of Topic 326			817
Provision	46	179
Ending balance	953	1,132
Commercial & Industrial
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	1,402	144
Adoption of Topic 326			626
Provision	(88)	77
Ending balance	1,314	847
Total Commercial
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	2,309	280
Adoption of Topic 326			1,443
Provision	(42)	256
Ending balance	2,267	1,979
Residential Real Estate
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	54	6
Adoption of Topic 326			34
Provision	(8)	2
Ending balance	46	42
Home Equity
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	0	0
Adoption of Topic 326			0
Provision	0	0
Ending balance	0	0
Other
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	19	7
Adoption of Topic 326			6
Provision	1	5
Ending balance	20	18
Total Consumer
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	19	7
Adoption of Topic 326			$ 6
Provision	1	5
Ending balance	$ 20	$ 18