Washington Trust Bancorp (WASH) 10-Q 4 May 23 2023 Q1 Quarterly report Financial data

Cover Page

Cover Page - shares	3 Months Ended
	Mar. 31, 2023	Apr. 30, 2023
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, 2023
Document Fiscal Year Focus	2023
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		17,019,236
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, 2023	Dec. 31, 2022
Assets:
Cash and due from banks		$ 134,989	$ 115,492
Short-term investments		3,291	2,930
Mortgage loans held for sale, at fair value		7,445	8,987
Available for sale debt securities, fair value		1,054,747	993,928
Federal Home Loan Bank stock, at cost		42,501	43,463
Loans:
Total loans	[1]	5,227,969	5,110,139
Less: allowance for credit losses on loans		38,780	38,027
Net loans		5,189,189	5,072,112
Premises and equipment, net		31,719	31,550
Operating lease right-of-use assets		26,170	27,156
Investment in bank-owned life insurance		101,782	102,182
Goodwill		63,909	63,909
Identifiable intangible assets, net		4,342	4,554
Other assets		199,098	193,788
Total assets		6,859,182	6,660,051
Liabilities:
Noninterest-bearing deposits		829,763	858,953
Interest-bearing deposits		4,438,751	4,160,009
Total deposits		5,268,514	5,018,962
Federal Home Loan Bank advances		925,000	980,000
Junior subordinated debentures		22,681	22,681
Operating lease liabilities		28,622	29,558
Other liabilities		149,382	155,181
Total liabilities		6,394,199	6,206,382
Commitments and contingencies (Note 16)
Shareholders' Equity:
Common stock		1,085	1,085
Paid-in capital		127,734	127,056
Retained earnings		495,231	492,043
Accumulated other comprehensive income (loss)		(141,760)	(157,800)
Treasury stock, at cost		(17,307)	(8,715)
Total shareholders' equity		464,983	453,669
Total liabilities and shareholders’ equity		$ 6,859,182	$ 6,660,051
[1]Includes net unamortized loan origination costs of $11.9 million and $11.6 million, respectively, at March 31, 2023 and December 31, 2022 and net unamortized premiums on loans purchased from and serviced by other financial institutions of $310 thousand and $318 thousand, respectively, at March 31, 2023 and December 31, 2022.

CONSOLIDATED BALANCE SHEETS (_2

CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Available for sale debt securities, amortized cost	$ 1,209,794	$ 1,166,340
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	16,985,872	17,182,753
Treasury stock, shares	377,585	180,704

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Interest income:
Interest and fees on loans		$ 59,749	$ 33,930
Interest on mortgage loans held for sale		152	232
Taxable interest on debt securities		7,194	4,230
Dividends on Federal Home Loan Bank stock		597	67
Other interest income		1,070	78
Total interest and dividend income		68,762	38,537
Interest expense:
Deposits		19,589	3,103
Federal Home Loan Bank advances		11,626	244
Junior subordinated debentures		354	99
Total interest expense		31,569	3,446
Net interest income	[1]	37,193	35,091
Provision for credit losses		800	100
Net interest income after provision for credit losses		36,393	34,991
Noninterest income:
Wealth management revenues	[1]	8,663	10,531
Mortgage banking revenues	[1]	1,245	3,501
Card interchange fees	[1]	1,132	1,164
Service charges on deposit accounts	[1]	777	668
Loan related derivative income	[1]	(51)	301
Income from bank-owned life insurance	[1]	1,165	601
Other income	[1]	352	393
Total noninterest income	[1]	13,283	17,159
Noninterest expense:
Salaries and employee benefits		21,784	21,002
Outsourced services		3,496	3,242
Net occupancy		2,437	2,300
Equipment		1,028	918
Legal, audit and professional fees		896	770
FDIC deposit insurance costs		872	366
Advertising and promotion		408	351
Amortization of intangibles		212	217
Other expenses		2,431	2,053
Total noninterest expense		33,564	31,219
Income (loss) before income taxes		16,112	20,931
Income tax expense		3,300	4,448
Net income		12,812	16,483
Net income available to common shareholders		$ 12,783	$ 16,429
Weighted average common shares outstanding - basic		17,074	17,331
Weighted average common shares outstanding - diluted		17,170	17,482
Per share information:
Basic earnings per common share		$ 0.75	$ 0.95
Diluted earnings per common share		$ 0.74	$ 0.94
[1]As reported in the Unaudited Consolidated Statements of Income.

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 12,812	$ 16,483
Other comprehensive income (loss), net of tax:
Net change in fair value of available for sale debt securities	13,198	(49,460)
Net change in fair value of cash flow hedges	2,797	(10,335)
Net change in fair value of defined benefit plan obligations	45	325
Total other comprehensive income (loss), net of tax	16,040	(59,470)
Total comprehensive income (loss)	$ 28,852	$ (42,987)

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]
Common stock, shares outstanding at Dec. 31, 2021		17,331,000
Shareholders' equity at Dec. 31, 2021	$ 564,808	$ 1,085	$ 126,511	$ 458,310	$ (19,981)	$ (1,117)
Net income	16,483			16,483
Total other comprehensive income (loss), net of tax	(59,470)				(59,470)
Cash dividends declared	(9,498)			(9,498)
Share-based compensation	888		888
Exercise of stock options and issuance of other compensation-related equity awards, net of awards surrendered, shares		1,000
Exercise of stock options and issuance of other compensation-related equity awards, net of awards surrendered, value	(19)	$ 0	(44)			25
Common stock, shares outstanding at Mar. 31, 2022		17,332,000
Shareholders' equity at Mar. 31, 2022	$ 513,192	$ 1,085	127,355	465,295	(79,451)	(1,092)
Common stock, shares outstanding at Dec. 31, 2022	17,182,753	17,183,000
Shareholders' equity at Dec. 31, 2022	$ 453,669	$ 1,085	127,056	492,043	(157,800)	(8,715)
Net income	12,812			12,812
Total other comprehensive income (loss), net of tax	16,040				16,040
Cash dividends declared	(9,624)			(9,624)
Share-based compensation	858		858
Exercise of stock options and issuance of other compensation-related equity awards, net of awards surrendered, shares		3,000
Exercise of stock options and issuance of other compensation-related equity awards, net of awards surrendered, value	(31)	$ 0	(180)			149
Treasury stock repurchased		(200,000)
Treasury stock purchased under Stock Repurchase Program, amount acquired	$ (8,741)					(8,741)
Common stock, shares outstanding at Mar. 31, 2023	16,985,872	16,986,000
Shareholders' equity at Mar. 31, 2023	$ 464,983	$ 1,085	$ 127,734	$ 495,231	$ (141,760)	$ (17,307)

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Stockholders' Equity [Abstract]
Cash dividends declared per share	$ 0.56	$ 0.54

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net income		$ 12,812	$ 16,483
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses		800	100
Depreciation of premises and equipment		975	838
Net amortization of premiums and discounts on securities and loans		324	966
Amortization of intangibles		212	217
Share-based compensation		858	888
Tax benefit (expense) from stock option exercises and other equity awards		(1)	10
Income from bank-owned life insurance	[1]	(1,165)	(601)
Net gains on loan sales, including changes in fair value		(662)	(3,085)
Proceeds from sales of loans, net		25,378	122,165
Loans originated for sale		(23,394)	(95,644)
(Increase) decrease in operating lease right-of-use assets		986	(2,124)
Increase (decrease) in operating lease liabilities		(936)	2,160
(Increase) decrease in other assets		(4,917)	21,289
Increase (decrease) in other liabilities		(176)	(25,100)
Net cash provided by (used in) operating activities		11,094	38,562
Cash flows from investing activities:
Purchases of mortgage-backed securities available for sale		(39,966)	(74,919)
Purchases of other debt securities available for sale		(20,221)	(250)
Maturities, calls and principal payments of mortgage-backed securities available for sale		16,136	43,334
Maturities, calls and principal payments of other debt securities available for sale		250	0
Net redemption (purchases) of Federal Home Loan Bank stock		962	4,579
Purchases of other equity investments		0	(188)
Net (increase) decrease in loans		(116,609)	(8,700)
Purchases of loans		(1,709)	(465)
Purchases of premises and equipment		(1,144)	(834)
Proceeds from surrender of bank-owned life insurance		1,566	0
Equity investment in real estate limited partnership		(6,632)	0
Net cash provided by (used in) investing activities		(167,367)	(37,443)
Cash flows from financing activities:
Net increase (decrease) in deposits		249,552	147,899
Proceeds from Federal Home Loan Bank advances		1,005,000	197,000
Repayment of Federal Home Loan Bank advances		(1,060,000)	(287,000)
Treasury stock purchased		(8,741)	0
Net proceeds from stock option exercises and issuance of other equity awards, net of awards surrendered		(31)	(19)
Cash dividends paid		(9,649)	(9,396)
Net cash provided by (used in) financing activities		176,131	48,484
Net increase (decrease) in cash and cash equivalents		19,858	49,603
Cash and cash equivalents at beginning of period		118,422	178,493
Cash and cash equivalents at end of period		138,280	228,096
Noncash Activities:
Loans charged off		61	36
Loans transferred to property acquired through foreclosure or repossession		683	0
Commitment for equity investment in real estate limited partnership		1,728	0
Supplemental Disclosures:
Interest payments		27,585	3,458
Income tax payments		$ 936	$ 931
[1]As reported in the Unaudited Consolidated Statements of Income.

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation Nature of Operations The Bancorp is a publicly-owned registered bank holding company that has elected to be a financial holding company. The Bancorp’s principal subsidiary is the Bank, a Rhode Island chartered financial institution founded in 1800. The Bank is the oldest community bank in the nation and the largest state-chartered bank headquartered in Rhode Island. Washington Trust offers a full range of financial services, including commercial, residential and consumer lending, retail and commercial deposit products, and wealth management and trust services through its offices in Rhode Island, Massachusetts and Connecticut. Basis of Presentation The accounting and reporting policies of the Washington Trust conform to GAAP and to general practices of the banking industry. The Unaudited Consolidated Financial Statements of the Corporation presented herein have been prepared pursuant to the rules of the SEC for quarterly reports on Form 10-Q and do not include all of the information and note disclosures required by GAAP for complete financial statements. 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, 2022. The Unaudited Consolidated Financial Statements include the accounts of the Bancorp and its wholly-owned subsidiaries, except subsidiaries that are not deemed necessary to be consolidated. Intercompany balances and transactions have been eliminated in consolidation. The Bancorp 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 trusts’ 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, which is classified in other assets, and the junior subordinated debentures are included in the Unaudited Consolidated Balance Sheets. Interest expense on the junior subordinated debentures is included in the Unaudited Consolidated Statements of Income. 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. Management considers the ACL on loans to be a material estimate that is particularly susceptible to change.

Recently Issued Accounting Pron

Recently Issued Accounting Pronouncements	3 Months Ended
	Mar. 31, 2023
Accounting Standards Update and Change in Accounting Principle [Abstract]
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements Accounting Standards Adopted in 2023 Financial Instruments - Credit Losses - ASC 326 ASU No. 2022-02, “Troubled Debt Restructurings and Vintage Disclosures” (“ASU 2022-02”), was issued in March 2022 to provide updates on the accounting treatment for TDRs and related disclosures requirements, as well as modifying the disclosure requirement associated with the existing credit quality indicators “vintage” disclosure. With respect to TDRs, ASU 2022-02 eliminates the recognition and measurement guidance for TDRs under current GAAP and instead requires that the Corporation evaluate whether the modification represents a new loan or a continuation of an existing loan, consistent with the current GAAP treatment for other loan modifications. In addition, ASU 2022-02 eliminates existing disclosure requirements on TDRs and replaces with enhanced disclosure requirements related to certain loan modifications made to borrowers experiencing financial difficulty. ASU 2022-02 also provides an update to the existing credit quality indicators “vintage” tabular disclosure requiring current period gross write-offs to be disclosed by year of origination for each loan segment. The provisions of ASU 2022-02 were effective January 1, 2023 and the Corporation adopted the provisions on a prospective basis. Historical disclosures on TDRs were removed from this report in accordance with the provisions of this ASU. The adoption of this ASU did not have a material impact on the consolidated financial statements. Business Combinations - ASC 805 ASU No. 2021-08, “Accounting for Contract Assets and Contract Liabilities from Contracts with Customers” (“ASU 2021-08”), was issued in October 2021 to clarify the accounting for contract cost assets and contract liabilities acquired in a business combination. Under current GAAP, an acquirer generally recognizes assets acquired and liabilities assumed in a business combination at fair value on the acquisition date. The provisions of ASU 2021-08 clarify that contract cost assets and contract liabilities acquired in a business combination should be accounted for in accordance with ASC 606, as if the acquirer had originated the contracts. The provisions of ASU 2021-08 were effective January 1, 2023 and the Corporation adopted the provisions on a prospective basis. The adoption of ASU 2021-08 did not have a material impact on the Corporation’s consolidated financial statements. Accounting Standards Pending Adoption There were no new accounting standards issued in 2023 that are applicable to the Corporation and pending adoption.

Securities

Securities	3 Months Ended
	Mar. 31, 2023
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, ACL on securities and fair value of securities by major security type and class of security: (Dollars in thousands) March 31, 2023 Amortized Cost Unrealized Gains Unrealized Losses ACL Fair Value Available for Sale Debt Securities: Obligations of U.S. government-sponsored enterprises $250,952 $— ($28,288) $— $222,664 Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 936,280 352 (124,762) — 811,870 Individual name issuer trust preferred debt securities 9,390 — (690) — 8,700 Corporate bonds 13,172 — (1,659) — 11,513 Total available for sale debt securities $1,209,794 $352 ($155,399) $— $1,054,747 (Dollars in thousands) December 31, 2022 Amortized Cost Unrealized Gains Unrealized Losses ACL Fair Value Available for Sale Debt Securities: Obligations of U.S. government-sponsored enterprises $231,203 $1 ($31,622) $— $199,582 Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 912,581 269 (138,748) — 774,102 Individual name issuer trust preferred debt securities 9,387 — (627) — 8,760 Corporate bonds 13,169 — (1,685) — 11,484 Total available for sale debt securities $1,166,340 $270 ($172,682) $— $993,928 Accrued interest receivable on available for sale debt securities totaled $3.1 million as of both March 31, 2023 and December 31, 2022. As of March 31, 2023 and December 31, 2022, securities with a fair value of $306.6 million and $294.8 million, respectively, were pledged as collateral for FHLB borrowings, potential borrowings with the FRBB, certain public deposits and for other purposes. See Note 9 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, 2023 Amortized Cost Fair Value Due in one year or less $106,939 $92,740 Due after one year to five years 464,167 405,495 Due after five years to ten years 381,590 333,522 Due after ten years 257,098 222,990 Total debt securities $1,209,794 $1,054,747 Included in the above table are debt securities with an amortized cost balance of $273.0 million and a fair value of $242.4 million at March 31, 2023 that are callable at the discretion of the issuers. Final maturities of the callable securities range from 1 year to 14 years, with call features ranging from 1 month to 16 months. 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, volatility 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. The following tables summarize available for sale debt securities in an unrealized loss position, for which an ACL 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, 2023 # Fair Unrealized # Fair Unrealized # Fair Unrealized Obligations of U.S. government-sponsored enterprises 4 $49,449 ($551) 19 $173,215 ($27,737) 23 $222,664 ($28,288) Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 44 180,541 (5,539) 121 618,269 (119,223) 165 798,810 (124,762) Individual name issuer trust preferred debt securities — — — 3 8,700 (690) 3 8,700 (690) Corporate bonds — — — 4 11,513 (1,659) 4 11,513 (1,659) Total 48 $229,990 ($6,090) 147 $811,697 ($149,309) 195 $1,041,687 ($155,399) (Dollars in thousands) Less than 12 Months 12 Months or Longer Total December 31, 2022 # Fair Unrealized # Fair Unrealized # Fair Unrealized Obligations of U.S. government-sponsored enterprises 4 $20,115 ($638) 18 $169,466 ($30,984) 22 $189,581 ($31,622) Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 95 288,777 (24,960) 66 471,355 (113,788) 161 760,132 (138,748) Individual name issuer trust preferred debt securities — — — 3 8,760 (627) 3 8,760 (627) Corporate bonds — — — 4 11,484 (1,685) 4 11,484 (1,685) Total 99 $308,892 ($25,598) 91 $661,065 ($147,084) 190 $969,957 ($172,682) There were no debt securities on nonaccrual status at March 31, 2023 and 2022 and, therefore there was no accrued interest related to debt securities reversed against interest income for the three months ended March 31, 2023 and 2022. As of March 31, 2023, the Corporation does not intend to sell these debt securities and has determined that it is more-likely-than-not that the Corporation would not be required to sell each security before the recovery of its amortized cost basis. In addition, management does not believe that any of these debt securities are impaired due to reasons of credit quality. As further described below, management believes the unrealized losses on these debt securities are primarily attributable to changes in the investment spreads and interest rates. As a result, there was no ACL recorded at both March 31, 2023 and December 31, 2022. Obligations of U.S. Government Agency and U.S. Government-Sponsored Enterprise Securities, including Mortgage-Backed Securities The contractual cash flows for these securities are either explicitly or implicitly guaranteed by the U.S. government, are highly rated by major credit rating agencies and have a long history of no credit losses. The issuers of these securities continue to make timely principal and interest payments and none of these securities were past due at March 31, 2023. Additionally, the Corporation utilizes a zero credit loss estimate for these securities. Individual Name Issuer Trust Preferred Debt Securities These securities in an unrealized loss position at March 31, 2023 included three trust preferred securities issued by three individual companies in the banking sector. 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, 2023, there was one individual name issuer trust preferred debt security with an amortized cost of $2.0 million and unrealized losses of $135 thousand that was rated below investment grade by S&P. We noted no downgrades to below investment grade between March 31, 2023 and the filing date of this report. Based on the information available through the filing date of this report, all individual name issuer trust preferred debt securities continue to accrue interest and make payments as expected with no payment deferrals or defaults on the part of the issuers. Corporate Bonds These securities in an unrealized loss position at March 31, 2023 included four corporate bond holdings issued by three individual companies in the financial services industry. 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, 2023, there was one corporate bond debt security with an amortized cost of $2.0 million and unrealized losses of $160 thousand that was rated below investment grade by S&P. We noted no downgrades to below investment grade between March 31, 2023 and the filing date of this report. Based on the information available through the filing date of this report, all corporate bond debt securities continue to accrue interest and make payments as expected with no payment deferrals or defaults on the part of the issuers.

Loans

Loans	3 Months Ended
	Mar. 31, 2023
Receivables [Abstract]
Loans	Loans The following table presents a summary of loans: (Dollars in thousands) March 31, December 31, 2022 Commercial: Commercial real estate (1) $1,909,136 $1,829,304 Commercial & industrial (2) 609,720 656,397 Total commercial 2,518,856 2,485,701 Residential Real Estate: Residential real estate (3) 2,403,255 2,323,002 Consumer: Home equity 288,878 285,715 Other (4) 16,980 15,721 Total consumer 305,858 301,436 Total loans (5) $5,227,969 $5,110,139 (1) 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) C&I consists of loans to businesses and individuals, a portion of which are fully or partially collateralized by real estate. (3) Residential real estate consists of mortgage and homeowner construction loans secured by one- to four-family residential properties. (4) Other consists of loans to individuals secured by general aviation aircraft and other personal installment loans. (5) Includes net unamortized loan origination costs of $11.9 million and $11.6 million, respectively, at March 31, 2023 and December 31, 2022 and net unamortized premiums on loans purchased from and serviced by other financial institutions of $310 thousand and $318 thousand, respectively, at March 31, 2023 and December 31, 2022. Loan balances exclude accrued interest receivable of $19.0 million and $17.6 million, respectively, as of March 31, 2023 and December 31, 2022. As of March 31, 2023 and December 31, 2022, loans amounting to $2.6 billion and $2.4 billion, respectively, were pledged as collateral to the FHLB under a blanket pledge agreement and to the FRBB for the discount window. See Note 9 for additional disclosure regarding borrowings. 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 aging analysis of past due loans, segregated by class of loans: (Dollars in thousands) Days Past Due March 31, 2023 30-59 60-89 Over 90 Total Past Due Current Total Loans Commercial: Commercial real estate $1,188 $— $— $1,188 $1,907,948 $1,909,136 Commercial & industrial 5 — 224 229 609,491 609,720 Total commercial 1,193 — 224 1,417 2,517,439 2,518,856 Residential Real Estate: Residential real estate 2,581 643 2,506 5,730 2,397,525 2,403,255 Consumer: Home equity 770 63 — 833 288,045 288,878 Other 15 — — 15 16,965 16,980 Total consumer 785 63 — 848 305,010 305,858 Total loans $4,559 $706 $2,730 $7,995 $5,219,974 $5,227,969 (Dollars in thousands) Days Past Due December 31, 2022 30-59 60-89 Over 90 Total Past Due Current Total Loans Commercial: Commercial real estate $1,187 $— $— $1,187 $1,828,117 $1,829,304 Commercial & industrial 265 — — 265 656,132 656,397 Total commercial 1,452 — — 1,452 2,484,249 2,485,701 Residential Real Estate: Residential real estate 4,793 303 3,779 8,875 2,314,127 2,323,002 Consumer: Home equity 1,103 132 — 1,235 284,480 285,715 Other 16 — — 16 15,705 15,721 Total consumer 1,119 132 — 1,251 300,185 301,436 Total loans $7,364 $435 $3,779 $11,578 $5,098,561 $5,110,139 Included in past due loans as of March 31, 2023 and December 31, 2022, were nonaccrual loans of $5.6 million and $7.2 million, respectively. In addition, all loans 90 days or more past due at March 31, 2023 and December 31, 2022 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 is a summary of nonaccrual loans, segregated by class of loans: (Dollars in thousands) Mar 31, Dec 31, Commercial: Commercial real estate $1,601 $— Commercial & industrial 920 — Total commercial 2,521 — Residential Real Estate: Residential real estate 10,470 11,894 Consumer: Home equity 989 952 Other — — Total consumer 989 952 Total nonaccrual loans $13,980 $12,846 Accruing loans 90 days or more past due $— $— No ACL was deemed necessary on nonaccrual loans with carrying values of $7.1 million and $6.5 million, respectively, as of March 31, 2023 and December 31, 2022. Nonaccrual loans of $8.3 million and $5.7 million, respectively, at March 31, 2023 and December 31, 2022 were current as to the payment of principal and interest. As of March 31, 2023 and December 31, 2022, nonaccrual loans secured by one- to four-family residential property amounting to $763 thousand and $2.9 million, respectively, were in process of foreclosure. There were no significant commitments to lend additional funds to borrowers whose loans were on nonaccrual status at March 31, 2023. The following table presents interest income recognized on nonaccrual loans: (Dollars in thousands) Three months ended March 31, 2023 2022 Commercial: Commercial real estate $27 $— Commercial & industrial 13 — Total commercial 40 — Residential Real Estate: Residential real estate 173 101 Consumer: Home equity 22 7 Other 1 — Total consumer 23 7 Total $236 $108 Troubled Loan Modifications As disclosed in Note 2, the Corporation adopted ASU 2022-02, which eliminated the accounting guidance for TDRs and added enhanced disclosures with respect to certain modifications for borrowers experiencing financial difficulty. Effective January 1, 2023, a loan that has been modified is considered a troubled loan modification, or TLM, when the following conditions are met: (1) the modification is considered a continuation of an existing loan and not a new loan in accordance with GAAP, (2) the modification is made to a borrower experiencing financial difficulty and (3) the modification has a direct impact to the contractual cash flows. Modifications with direct impact to contractual cash flows are defined as: principal forgiveness, interest rate reductions, maturity extensions, other-than-insignificant payment delays, or any combination thereof. If each of the aforementioned criteria are met, then the modification is considered a TLM and subject to the enhanced disclosure requirements. During the three months ended March 31, 2023, there were no TLMs. Individually Analyzed Loans Individually analyzed loans include nonaccrual commercial loans, as well as certain other loans based on the underlying risk characteristics and the discretion of management to individually analyze such loans. Prior to January 1, 2023, individually analyzed loans also included TDRs. As of March 31, 2023, individually analyzed loans amounted to $8.2 million, all of which were considered collateral dependent. As of December 31, 2022, individually analyzed loans amounted to $10.0 million, of which $8.5 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 7 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, 2023 December 31, 2022 Carrying Value Related Allowance Carrying Value Related Allowance Commercial: Commercial real estate (1) $2,096 $308 $2,103 $— Commercial & industrial (2) 920 224 — — Total commercial 3,016 532 2,103 — Residential Real Estate: Residential real estate (3) 4,614 — 5,760 — Consumer: Home equity (3) 592 — 592 — Other — — — — Total consumer 592 — 592 — Total $8,222 $532 $8,455 $— (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 ACL on loans. See Note 5 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 SBA guarantees. Special Mention - Loans with potential weaknesses that deserve management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the asset or in the Bank’s position as creditor at some future date. Special Mention assets are not adversely classified and do not expose the Bank to sufficient risk to warrant adverse classification. Examples of these conditions include but are not limited to outdated or poor quality financial data, strains on liquidity and leverage, losses or negative trends in operating results, marginal cash flow, weaknesses in occupancy rates or trends in the case of commercial real estate and frequent delinquencies. Classified - Loans identified as “substandard,” “doubtful” or “loss” based on criteria consistent with guidelines provided by banking regulators. A “substandard” loan has defined weaknesses which make payment default or principal exposure likely, but not yet certain. Such loans are apt to be dependent upon collateral liquidation, a secondary source of repayment or an event outside of the normal course of business. The loans are closely watched and are either already on nonaccrual status or may be placed on nonaccrual status when management determines there is uncertainty of collectability. A “doubtful” loan is placed on nonaccrual status and has a high probability of loss, but the extent of the loss is difficult to quantify due to dependency upon collateral having a value that is difficult to determine or upon some near-term event which lacks certainty. A loan in the “loss” category is considered generally uncollectible or the timing or amount of payments cannot be determined. “Loss” is not intended to imply that the loan has no recovery value, but rather, it is not practical or desirable to continue to carry the asset. The Corporation’s procedures call for loan risk ratings and classifications to be revised whenever information becomes available that indicates a change is warranted. On a quarterly basis, management reviews a watched asset list, which generally consists of commercial loans that are risk-rated 6 or worse, highly leveraged transaction loans, high-volatility commercial real estate 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 (commonly known as “FICO”) score and an updated estimated LTV ratio. LTV is estimated based on such factors as geographic location, the original appraised value and changes in median home prices, and takes into consideration the age of the loan. The results of these analyses and other credit review procedures, including selected targeted internal reviews, are taken into account in the determination of qualitative loss factors for residential real estate and home equity consumer credits. The following table includes information on credit quality indicators and gross charge-offs for the Corporation’s loan portfolio, segregated by class of loans as of March 31, 2023: (Dollars in thousands) Term Loans Amortized Cost by Origination Year 2023 2022 2021 2020 2019 Prior Revolving Loans Amortized Cost Revolving Loans Converted to Term Loans Total Commercial: CRE: Pass $74,365 $556,396 $394,005 $179,602 $168,940 $413,854 $8,931 $1,154 $1,797,247 Special Mention 20,487 — 22,302 668 27,761 38,968 102 — 110,288 Classified — — — — — 1,601 — — 1,601 Total CRE 94,852 556,396 416,307 180,270 196,701 454,423 9,033 1,154 1,909,136 CRE gross charge-offs — — — — — — — — — C&I: Pass 4,116 120,221 59,156 67,621 82,807 167,451 91,060 979 593,411 Special Mention 11,529 836 — — 185 1,412 1,427 — 15,389 Classified — — 224 — 696 — — — 920 Total C&I 15,645 121,057 59,380 67,621 83,688 168,863 92,487 979 609,720 C&I gross charge-offs (1) 11 — — — — — — — 11 Residential Real Estate: Residential real estate: Current 108,758 836,112 700,923 272,006 120,896 358,830 — — 2,397,525 Past Due — — 392 530 1,406 3,402 — — 5,730 Total residential real estate 108,758 836,112 701,315 272,536 122,302 362,232 — — 2,403,255 Residential real estate gross charge-offs — — — — — — — — — Consumer: Home equity: Current 5,140 18,965 7,993 3,585 2,319 5,344 234,279 10,420 288,045 Past Due — — — — — 63 317 453 833 Total home equity 5,140 18,965 7,993 3,585 2,319 5,407 234,596 10,873 288,878 Home equity gross charge-offs — — — — — — — — — Other: Current 1,951 4,180 4,204 1,427 217 4,764 222 — 16,965 Past Due 15 — — — — — — — 15 Total other 1,966 4,180 4,204 1,427 217 4,764 222 — 16,980 Other gross charge-offs (1) 42 — 8 — — — — — 50 Total loans $226,361 $1,536,710 $1,189,199 $525,439 $405,227 $995,689 $336,338 $13,006 $5,227,969 Total gross charge-offs $53 $— $8 $— $— $— $— $— $61 (1) Gross charge-offs in 2023 represent charge-offs of business and consumer account overdraft balances. The following table includes information on credit quality indicators for the Corporation’s loan portfolio, segregated by class of loans as of December 31, 2022: (Dollars in thousands) Term Loans Amortized Cost by Origination Year 2022 2021 2020 2019 2018 Prior Revolving Loans Amortized Cost Revolving Loans Converted to Term Loans Total Commercial: CRE: Pass $591,596 $383,062 $177,286 $170,259 $148,371 $242,061 $6,243 $1,437 $1,720,315 Special Mention 20,579 22,324 328 24,270 28,676 10,564 146 — 106,887 Classified — — 503 — 1,187 412 — — 2,102 Total CRE 612,175 405,386 178,117 194,529 178,234 253,037 6,389 1,437 1,829,304 C&I: Pass 127,152 63,180 71,265 86,470 85,011 114,241 90,987 745 639,051 Special Mention 13,566 — — — 1,427 — 1,426 — 16,419 Classified — 225 — 7 — — 695 — 927 Total C&I 140,718 63,405 71,265 86,477 86,438 114,241 93,108 745 656,397 Residential Real Estate: Residential real estate: Current 838,566 707,760 277,613 123,098 72,541 294,549 — — 2,314,127 Past Due — 600 — 266 2,315 5,694 — — 8,875 Total residential real estate 838,566 708,360 277,613 123,364 74,856 300,243 — — 2,323,002 Consumer: Home equity: Current 20,665 8,308 3,742 2,406 1,947 3,139 235,004 9,268 284,479 Past Due — — — — 68 98 548 522 1,236 Total home equity 20,665 8,308 3,742 2,406 2,015 3,237 235,552 9,790 285,715 Other: Current 4,231 4,287 1,676 299 235 4,726 251 — 15,705 Past Due 16 — — — — — — — 16 Total other 4,247 4,287 1,676 299 235 4,726 251 — 15,721 Total Loans $1,616,371 $1,189,746 $532,413 $407,075 $341,778 $675,484 $335,300 $11,972 $5,110,139 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, 2023
Credit Loss [Abstract]
Allowance for Credit Losses on Loans	Allowance for Credit Losses on Loans The ACL on loans is management’s estimate of expected lifetime credit losses on loans carried at amortized cost. 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. The following table presents the activity in the ACL on loans for the three months ended March 31, 2023: (Dollars in thousands) Commercial Consumer CRE C&I Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $18,435 $10,356 $28,791 $7,740 $1,115 $381 $1,496 $38,027 Charge-offs — (11) (11) — — (50) (50) (61) Recoveries — 5 5 — 1 8 9 14 Provision 2,939 (517) 2,422 (1,501) (138) 17 (121) 800 Ending Balance $21,374 $9,833 $31,207 $6,239 $978 $356 $1,334 $38,780 The following table presents the activity in the ACL on loans for the three months ended March 31, 2022: (Dollars in thousands) Commercial Consumer CRE C&I Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $18,933 $10,832 $29,765 $7,860 $1,069 $394 $1,463 $39,088 Charge-offs — (5) (5) — — (31) (31) (36) Recoveries 145 6 151 21 2 10 12 184 Provision (618) 389 (229) 185 27 17 44 — Ending Balance $18,460 $11,222 $29,682 $8,066 $1,098 $390 $1,488 $39,236

Derivative Financial Instrument

Derivative Financial Instruments	3 Months Ended
	Mar. 31, 2023
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. Derivative assets are included in other assets and derivative liabilities are included in other liabilities in the Unaudited Consolidated Balance Sheets. 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, 2023 and December 31, 2022, the Corporation had an interest rate swap contract that was designated as a cash flow hedge to hedge the interest rate risk associated with short-term variable rate FHLB advances. The interest rate swap on borrowings matures in December 2023. In addition, at December 31, 2022, the Corporation had an interest rate swap contract that was designated as a cash flow hedge to hedge the interest rate risk associated with a pool of variable rate commercial loans. On March 31, 2023, the Corporation terminated this interest rate swap contract and the derivative liability was derecognized. The loss on this interest rate swap included in the AOCL component of shareholders’ equity was updated to its termination date fair value of $26.5 million, or $20.1 million after tax. This loss will be amortized into earnings as a reduction of interest income on a straight-line basis over the remaining life of the original interest rate swap term, or through May 1, 2026. The changes in fair value of derivatives designated as cash flow hedges are recorded in other comprehensive income (loss) and subsequently reclassified to earnings when gains or losses are realized. Loan Related Derivative Contracts Interest Rate Derivative Contracts with Customers The Corporation enters into interest rate swap and interest rate cap contracts to help commercial loan borrowers manage their interest rate risk. These interest rate swap contracts allow borrowers to convert variable-rate loan payments to fixed-rate loan payments, while interest rate cap contracts allow borrowers to limit their interest rate exposure in a rising rate environment. When the Corporation enters into an interest rate derivative contract with a commercial loan borrower, it simultaneously enters into a “mirror” interest rate contract with a third party. For interest rate swaps, 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. 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. 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 recognized in earnings. The following table presents the notional amounts and fair values of derivative instruments in the Unaudited Consolidated Balance Sheets: (Dollars in thousands) March 31, 2023 December 31, 2022 Fair Value Fair Value Notional Amounts Derivative Assets Derivative Liabilities Notional Amounts Derivative Assets Derivative Liabilities Derivatives Designated as Cash Flow Hedging Instruments: Interest rate risk management contracts: Interest rate swaps (1) $20,000 $405 $— $320,000 $548 $31,178 Derivatives not Designated as Hedging Instruments: Loan related derivative contracts: Interest rate contracts with customers 933,832 1,131 53,185 935,099 32 68,137 Mirror contracts with counterparties 933,832 52,875 1,260 935,099 67,797 61 Risk participation agreements 284,325 — 2 282,191 — 2 Mortgage loan commitments: Interest rate lock commitments 26,489 404 — 12,201 144 4 Forward sale commitments 38,810 12 305 23,150 58 150 Gross amounts 54,827 $54,752 68,579 99,532 Less: amounts offset (2) 1,260 1,260 23,524 23,524 Derivative balances, net of offset 53,567 53,492 45,055 76,008 Less: collateral pledged (3) — — — 7,716 Net amounts $53,567 $53,492 $45,055 $68,292 (1) The fair value of derivative assets includes accrued interest receivable of $25 thousand and $24 thousand, respectively, at March 31, 2023 and December 31, 2022. The fair value of derivative liabilities includes accrued interest payable $856 thousand at December 31, 2022. (2) Interest rate risk management contracts and loan related derivative contracts with counterparties are subject to master netting arrangements. (3) Collateral pledged to derivative counterparties is in the form of cash. Washington Trust may need to post additional collateral in the future in proportion to potential increases in unrealized loss positions. The following table presents the effect of derivative instruments in the Unaudited Consolidated Statements of Changes in Shareholders’ Equity: (Dollars in thousands) Gain (Loss) Recognized in Three months ended March 31, 2023 2022 Derivatives Designated as Cash Flow Hedging Instruments: Interest rate risk management contracts: Interest rate swaps $2,797 ($10,335) Total $2,797 ($10,335) For derivatives designated as cash flow hedging instruments, see Note 14 for additional disclosure pertaining to the amounts and location of reclassifications from AOCL into earnings. The following table presents the effect of derivative instruments in the Unaudited Consolidated Statements of Income: (Dollars in thousands) Amount of Gain (Loss) Three months ended March 31, Statement of Income Location 2023 2022 Derivatives not Designated as Hedging Instruments: Loan related derivative contracts: Interest rate contracts with customers Loan related derivative income $11,132 ($40,822) Mirror interest rate contracts with counterparties Loan related derivative income (11,171) 41,122 Risk participation agreements Loan related derivative income (11) 1 Mortgage loan commitments: Interest rate lock commitments Mortgage banking revenues 263 (934) Forward sale commitments Mortgage banking revenues (124) 2,991 Total $89 $2,358

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2023
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The Corporation uses fair value measurements to record fair value adjustments on certain assets and liabilities and to determine fair value disclosures. Items recorded at fair value on a recurring basis include securities available for sale, mortgage loans held for sale and derivatives. Additionally, from time to time, we may be required to record at fair value other assets on a nonrecurring basis, such as collateral dependent individually analyzed loans, OREO 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, or “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 $7,445 $8,987 Aggregate principal balance 7,295 8,860 Difference between fair value and principal balance $150 $127 Changes in fair value of mortgage loans held for sale accounted for under the fair value option election are included in mortgage banking revenues in the Unaudited Consolidated Statements of Income. Changes in fair value amounted to an increase to mortgage banking revenues of $24 thousand for the three months ended March 31, 2023, compared to a decrease to mortgage banking revenues of $1.1 million for the same period in 2022. There were no mortgage loans held for sale 90 days or more past due as of March 31, 2023 and December 31, 2022. 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, 2023 and December 31, 2022. 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, 2023 and December 31, 2022. Mortgage Loans Held for Sale The Corporation has elected the fair value option for mortgage loans held for sale. The fair value is estimated based on current market prices for similar loans in the secondary market and therefore are classified as Level 2 assets. Collateral Dependent Individually Analyzed Loans Collateral dependent individually analyzed loans are valued based upon the lower of amortized cost or fair value. Fair value is determined based on the appraised value of the underlying collateral. Such collateral primarily consists of real estate and, to a lesser extent, other business assets. For collateral dependent loans that are expected to be repaid substantially through the sale of the collateral, management adjusts the fair value for estimated costs to sell. Management may also adjust appraised values to reflect estimated market value declines or apply other discounts to appraised values resulting from its knowledge of the collateral. Internal valuations may be utilized to determine the fair value of other business assets. Collateral dependent individually analyzed loans are categorized as Level 3. Derivatives Interest rate derivative contracts are traded in over-the-counter markets where quoted market prices are not readily available. Fair value measurements are determined using independent valuation software, which utilizes the present value of future cash flows discounted using market observable inputs such as forward rate assumptions. The Corporation evaluates the credit risk of its counterparties, as well as that of the Corporation. Accordingly, factors such as the likelihood of default by the Corporation and its counterparties, its net exposures and remaining contractual life are considered in determining if any fair value adjustments related to credit risk are required. Counterparty exposure is evaluated by netting positions that are subject to master netting agreements, as well as considering the amount of collateral securing the position, if any. The Corporation has determined that the majority of the inputs used to value its derivative positions fall within Level 2 of the fair value hierarchy. However, the credit valuation adjustments utilize Level 3 inputs. As of March 31, 2023 and December 31, 2022, 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. 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, 2023 Assets: Available for sale debt securities: Obligations of U.S. government-sponsored enterprises $222,664 $— $222,664 $— Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 811,870 — 811,870 — Individual name issuer trust preferred debt securities 8,700 — 8,700 — Corporate bonds 11,513 — 11,513 — Mortgage loans held for sale 7,445 — 7,445 — Derivative assets 53,567 — 53,567 — Total assets at fair value on a recurring basis $1,115,759 $— $1,115,759 $— Liabilities: Derivative liabilities $53,492 $— $53,492 $— Total liabilities at fair value on a recurring basis $53,492 $— $53,492 $— (Dollars in thousands) Total Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs December 31, 2022 Assets: Available for sale debt securities: Obligations of U.S. government-sponsored enterprises $199,582 $— $199,582 $— Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 774,102 — 774,102 — Individual name issuer trust preferred debt securities 8,760 — 8,760 — Corporate bonds 11,484 — 11,484 — Mortgage loans held for sale 8,987 — 8,987 — Derivative assets 45,055 — 45,055 — Total assets at fair value on a recurring basis $1,047,970 $— $1,047,970 $— Liabilities: Derivative liabilities $76,008 $— $76,008 $— Total liabilities at fair value on a recurring basis $76,008 $— $76,008 $— Items Recorded at Fair Value on a Nonrecurring Basis The following table presents the carrying value of assets held at March 31, 2023, which were written down to fair value during the three months ended March 31, 2023: (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 $1,292 $— $— $1,292 Total assets at fair value on a nonrecurring basis $1,292 $— $— $1,292 There were no assets written down to fair value during the twelve months ended December 31, 2022. The following table presents 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, 2023 Collateral dependent individually analyzed loans $1,292 Appraisals of collateral Discount for costs to sell 0% - 47% (43%) Appraisal adjustments 0% - 100% (9%) 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, BOLI, non-maturity deposits and accrued interest payable. The Corporation considers cash and cash equivalents, accrued interest receivable and accrued interest payable as level 1 measurements within the fair value hierarchy. The Corporation considers FHLB stock, BOLI and non-maturity deposits as level 2 measurements. (Dollars in thousands) March 31, 2023 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 $5,189,189 $5,044,231 $— $— $5,044,231 Financial Liabilities: Time deposits $1,531,835 $1,558,899 $— $1,558,899 $— FHLB advances 925,000 925,350 — 925,350 — Junior subordinated debentures 22,681 18,558 — 18,558 — (Dollars in thousands) December 31, 2022 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 $5,072,112 $4,929,449 $— $— $4,929,449 Financial Liabilities: Time deposits $1,122,882 $1,137,219 $— $1,137,219 $— FHLB advances 980,000 978,590 — 978,590 — Junior subordinated debentures 22,681 18,963 — 18,963 —

Deposits

Deposits	3 Months Ended
	Mar. 31, 2023
Deposits [Abstract]
Deposits	Deposits The following table presents a summary of deposits: (Dollars in thousands) Mar 31, 2023 Dec 31, 2022 Noninterest-bearing: Demand deposits $829,763 $858,953 Interest-bearing: Interest-bearing demand deposits (1) 319,598 333,197 NOW accounts 828,700 871,875 Money market accounts 1,214,014 1,255,805 Savings accounts 544,604 576,250 Time deposits (2) 1,531,835 1,122,882 Total interest-bearing deposits $4,438,751 $4,160,009 Total deposits $5,268,514 $5,018,962 (1) Includes wholesale brokered demand deposit balances of $1,233 and $31,153, respectively, as of March 31, 2023 and December 31, 2022. (2) Includes wholesale brokered time deposit balances of $607,329 and $327,044, respectively, as of March 31, 2023 and December 31, 2022. The following table presents scheduled maturities of time certificates of deposit: (Dollars in thousands) Scheduled Maturity Weighted Average Rate April 1, 2023 to December 31, 2023 $945,304 3.44 % 2024 386,027 3.86 2025 112,789 2.99 2026 39,901 1.98 2027 33,817 2.88 2028 and thereafter 13,997 3.68 Balance at December 31, 2023 $1,531,835 3.46 % Time certificates of deposit in denominations of $250 thousand or more totaled $241.8 million and $200.9 million, respectively, at December 31, 2023 and 2022.

Borrowings

Borrowings	3 Months Ended
	Mar. 31, 2023
Debt Disclosure [Abstract]
Borrowings	Borrowings Advances payable to the FHLB amounted to $925.0 million and $980.0 million, respectively, at March 31, 2023 and December 31, 2022. As of March 31, 2023 and December 31, 2022, the Bank had access to a $40.0 million unused line of credit with the FHLB. Additionally, the Bank had a $215.0 million standby letter of credit with the FHLB at March 31, 2023 and December 31, 2022. This standby letter of credit was executed in 2022 to collateralize an institutional deposit. The Bank had remaining available borrowing capacity of $859.6 million and $668.3 million, respectively, with the FHLB at March 31, 2023 and December 31, 2022. 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, 2023: (Dollars in thousands) Scheduled Weighted April 1, 2023 to December 31, 2023 $665,000 4.72 % 2024 40,000 4.56 2025 80,000 4.29 2026 90,000 4.31 2027 20,000 4.13 2028 and thereafter 30,000 4.12 Balance at March 31, 2023 $925,000 4.60 %

Shareholders' Equity

Shareholders' Equity	3 Months Ended
	Mar. 31, 2023
Equity [Abstract]
Shareholders' Equity	Shareholders' Equity Stock Repurchase Program The 2023 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 numbers 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 2023 Repurchase Program commenced on January 1, 2023 and expires on December 31, 2023, and may be modified, suspended, or discontinued at any time. During the three months ended March 31, 2023, the Corporation repurchased 200,000 shares, at an average price of $43.70 and a total cost of $8.7 million. Regulatory Capital Requirements Capital levels at March 31, 2023 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, 2023 Total Capital (to Risk-Weighted Assets): Corporation $601,662 12.01 % $400,831 8.00 % N/A N/A Bank 584,596 11.67 400,723 8.00 $500,904 10.00 % Tier 1 Capital (to Risk-Weighted Assets): Corporation 565,329 11.28 300,623 6.00 N/A N/A Bank 548,263 10.95 300,542 6.00 400,723 8.00 Common Equity Tier 1 Capital (to Risk-Weighted Assets): Corporation 543,333 10.84 225,467 4.50 N/A N/A Bank 548,263 10.95 225,407 4.50 325,587 6.50 Tier 1 Capital (to Average Assets): (1) Corporation 565,329 8.25 273,951 4.00 N/A N/A Bank 548,263 8.01 273,868 4.00 342,336 5.00 December 31, 2022 Total Capital (to Risk-Weighted Assets): Corporation 605,005 12.37 391,363 8.00 N/A N/A Bank 588,090 12.02 391,260 8.00 489,074 10.00 Tier 1 Capital (to Risk-Weighted Assets): Corporation 571,794 11.69 293,522 6.00 N/A N/A Bank 554,879 11.35 293,445 6.00 391,260 8.00 Common Equity Tier 1 Capital (to Risk-Weighted Assets): Corporation 549,798 11.24 220,142 4.50 N/A N/A Bank 554,879 11.35 220,083 4.50 317,898 6.50 Tier 1 Capital (to Average Assets): (1) Corporation 571,794 8.65 264,295 4.00 N/A N/A Bank 554,879 8.40 264,177 4.00 330,222 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, 2023 and December 31, 2022. 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, 2023 and December 31, 2022, $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 capital adequacy guidelines of the Federal Reserve. In accordance with regulatory capital rules, the Corporation elected the option to delay the estimated impact of 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 exclude the full impact of the increased ACL on loans and unfunded loan commitments attributed to the adoption of ASC 326, adjusted for an approximation of the after-tax provision for credit losses attributable to ASC 326 relative to the incurred loss methodology during the two-year deferral period. The cumulative difference at the end of the deferral period is being phased-in to regulatory capital over the three-year transition period, which began January 1, 2022.

Revenue from Contracts with Cus

Revenue from Contracts with Customers	3 Months Ended
	Mar. 31, 2023
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, 2023 2022 (Dollars in thousands) Revenue (1) ASC 606 Revenue (2) Revenue (1) ASC 606 Revenue (2) Net interest income $37,193 $— $35,091 $— Noninterest income: Wealth management revenues 8,663 8,663 10,531 10,531 Mortgage banking revenues 1,245 — 3,501 — Card interchange fees 1,132 1,132 1,164 1,164 Service charges on deposit accounts 777 777 668 668 Loan related derivative income (51) — 301 — Income from bank-owned life insurance 1,165 — 601 — Other income 352 276 393 286 Total noninterest income 13,283 10,848 17,159 12,649 Total revenues $50,476 $10,848 $52,250 $12,649 (1) As reported in the Unaudited Consolidated Statements of Income. (2) Revenue from contracts with customers in scope of ASC 606. The following table presents revenue from contracts with customers based on the timing of revenue recognition: (Dollars in thousands) Three months ended March 31, 2023 2022 Revenue recognized at a point in time: Card interchange fees $1,132 $1,164 Service charges on deposit accounts 558 549 Other income 216 229 Revenue recognized over time: Wealth management revenues 8,663 10,531 Service charges on deposit accounts 219 119 Other income 60 57 Total revenues from contracts in scope of Topic 606 $10,848 $12,649 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 $6.6 million and $5.1 million, respectively, at March 31, 2023 and December 31, 2022 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, 2023 and December 31, 2022 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 $2.0 million and $2.1 million, respectively, at March 31, 2023 and

Defined Benefit Pension Plans

Defined Benefit Pension Plans	3 Months Ended
	Mar. 31, 2023
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, 2023 2022 2023 2022 Net Periodic Benefit Cost: Service cost (1) $351 $516 $39 $54 Interest cost (2) 884 592 176 106 Expected return on plan assets (2) (1,147) (1,159) — — Recognized net actuarial loss (2) — 255 59 173 Net periodic benefit cost $88 $204 $274 $333 (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, 2023 2022 2023 2022 Measurement date Dec 31, 2022 Dec 31, 2021 Dec 31, 2022 Dec 31, 2021 Equivalent single discount rate for benefit obligations 5.54% 3.00% 5.50% 2.89% Equivalent single discount rate for service cost 5.60 3.11 5.61 3.16 Equivalent single discount rate for interest cost 5.43 2.67 5.40 2.48 Expected long-term return on plan assets 5.25 5.25 N/A N/A Rate of compensation increase 5.00 3.75 5.00 3.75

Business Segments

Business Segments	3 Months Ended
	Mar. 31, 2023
Segment Reporting [Abstract]
Business Segments	Business Segments The Corporation manages its operations through two reportable business segments, consisting of Commercial Banking and Wealth Management Services. Management uses an allocation methodology to allocate income and expenses to the business lines. Direct activities are assigned to the appropriate business segment to which the activity relates. Indirect activities, such as corporate, technology and other support functions, are allocated to business segments primarily based upon full-time equivalent employee computations. Commercial Banking The Commercial Banking segment includes commercial, residential and consumer lending activities; mortgage banking activities; deposit generation; cash management activities; banking activities, including customer support and the operation of ATMs, telephone banking, internet banking and mobile banking services; as well as investment portfolio and wholesale funding activities. Wealth Management Services The Wealth Management Services segment includes investment management; holistic financial planning services; personal trust and estate services, including services as trustee, personal representative, custodian and guardian; settlement of decedents’ estates; and institutional trust services, including custody and fiduciary services. 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 Consolidated Total Three months ended March 31, 2023 2022 2023 2022 2023 2022 Net interest income (expense) $37,180 $35,108 $13 ($17) $37,193 $35,091 Provision for credit losses 800 100 — — 800 100 Net interest income (expense) after provision for credit losses 36,380 35,008 13 (17) 36,393 34,991 Noninterest income 4,431 6,512 8,852 10,647 13,283 17,159 Noninterest expenses: Depreciation and amortization expense 831 711 356 344 1,187 1,055 Other noninterest expenses 24,635 22,611 7,742 7,553 32,377 30,164 Total noninterest expenses 25,466 23,322 8,098 7,897 33,564 31,219 Income before income taxes 15,345 18,198 767 2,733 16,112 20,931 Income tax expense 3,087 3,797 213 651 3,300 4,448 Net income $12,258 $14,401 $554 $2,082 $12,812 $16,483 Total assets at period end $6,785,254 $5,773,796 $73,928 $74,203 $6,859,182 $5,847,999 Expenditures for long-lived assets 1,136 730 8 104 1,144 834

Other Comprehensive Income (Los

Other Comprehensive Income (Loss)	3 Months Ended
	Mar. 31, 2023
Equity [Abstract]
Other Comprehensive Income (Loss)	Other Comprehensive Income (Loss) The following table presents the activity in other comprehensive income (loss): Three months ended March 31, 2023 2022 (Dollars in thousands) Pre-tax Amounts Income Tax Benefit (Expense) Net of Tax Pre-tax Amounts Income Tax Benefit (Expense) Net of Tax Available for Sale Debt Securities: Change in fair value of available for sale debt securities $17,365 ($4,167) $13,198 ($65,078) $15,618 ($49,460) Cash Flow Hedges: Change in fair value of cash flow hedges 1,046 (251) 795 (13,201) 3,168 (10,033) Net cash flow hedge losses (gains) reclassified into earnings (1) 2,636 (634) 2,002 (399) 97 (302) Net change in fair value of cash flow hedges 3,682 (885) 2,797 (13,600) 3,265 (10,335) Defined Benefit Plan Obligations: Amortization of net actuarial losses (2) 59 (14) 45 428 (103) 325 Total other comprehensive income (loss) $21,106 ($5,066) $16,040 ($78,250) $18,780 ($59,470) (1) For the three months ended March 31, 2023 and 2022, the pre-tax amounts reclassified into earnings in the Unaudited Consolidated Statements of Income include a reduction of $2.8 million and an increase of $493 thousand, respectively, in interest and fees on loans, as well as a reduction of $127 thousand and an increase of $94 thousand, respectively, in FHLB interest expense. (2) The pre-tax amounts are included in other expenses in the Unaudited Consolidated Statements of Income. The following tables present the changes in AOCL by component, net of tax: (Dollars in thousands) Net Unrealized Losses on Available For Sale Debt Securities Net Unrealized Losses on Cash Flow Hedges Net Unrealized Losses on Defined Benefit Plan Obligations Total For the three months ended March 31, 2023 Balance at December 31, 2022 ($131,033) ($22,645) ($4,122) ($157,800) Other comprehensive income before reclassifications 13,198 795 — 13,993 Amounts reclassified from accumulated other comprehensive loss — 2,002 45 2,047 Net other comprehensive income 13,198 2,797 45 16,040 Balance at March 31, 2023 ($117,835) ($19,848) ($4,077) ($141,760) (Dollars in thousands) Net Unrealized Losses on Available For Sale Debt Securities Net Unrealized Losses on Cash Flow Hedges Net Unrealized Losses on Defined Benefit Plan Obligations Total For the three months ended March 31, 2022 Balance at December 31, 2021 ($6,795) ($4,013) ($9,173) ($19,981) Other comprehensive loss before reclassifications (49,460) (10,033) — (59,493) Amounts reclassified from accumulated other comprehensive loss — (302) 325 23 Net other comprehensive (loss) income (49,460) (10,335) 325 (59,470) Balance at March 31, 2022 ($56,255) ($14,348) ($8,848) ($79,451)

Earnings per Common Share

Earnings per Common Share	3 Months Ended
	Mar. 31, 2023
Earnings Per Share [Abstract]
Earnings per Common Share	Earnings per Common Share The following table presents the calculation of EPS: (Dollars and shares in thousands, except per share amounts) Three months ended March 31, 2023 2022 Earnings for basic and diluted earnings per common share: Net income $12,812 $16,483 Less: dividends and undistributed earnings allocated to participating securities (29) (54) Net income available to common shareholders $12,783 $16,429 Shares: Weighted average common shares outstanding 17,074 17,331 Dilutive effect of common stock equivalents 96 151 Weighted average diluted common shares outstanding 17,170 17,482 Earnings per common share: Basic earnings per common share $0.75 $0.95 Diluted earnings per common share $0.74 $0.94 Weighted average common stock equivalents, not included in common stock equivalents above because they were anti-dilutive, totaled 303,982 for the three months ended March 31, 2023, compared to 94,175 for the same period in 2022.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2023
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. At March 31, 2023 and December 31, 2022, there were no liabilities to beneficiaries resulting from standby letters of credit. 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 contracts with commercial borrowers are similar to those used for loans. The interest rate contracts with other counterparties are generally subject to bilateral collateralization terms. Interest Rate Risk Management Contracts The Corporation’s interest rate risk management contracts consist of interest rate swap 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. 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 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: $1,409,788 $1,308,873 Standby letters of credit 9,696 9,028 Financial instruments whose notional amounts exceed the amounts of credit risk: Mortgage loan commitments: Interest rate lock commitments 26,489 12,201 Forward sale commitments 38,810 23,150 Loan related derivative contracts: Interest rate contracts with customers 933,832 935,099 Mirror interest rate contracts with counterparties 933,832 935,099 Risk participation-in agreements 221,634 221,247 Interest rate risk management contracts: Interest rate swaps 20,000 320,000 See Note 6 for additional disclosure pertaining to derivative financial instruments. ACL on Unfunded Commitments The ACL on unfunded commitments is management’s estimate of expected lifetime credit losses over the expected contractual term 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. 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 activity in the ACL on unfunded commitments for the three months ended March 31, 2023 is presented below: (Dollars in thousands) Commercial Consumer CRE C&I Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $1,236 $988 $2,224 $50 $— $16 $16 $2,290 Provision 132 (105) 27 (25) — (2) (2) — Ending Balance $1,368 $883 $2,251 $25 $— $14 $14 $2,290 The activity in the ACL on unfunded commitments for the three months ended March 31, 2022 is presented below: (Dollars in thousands) Commercial Consumer CRE C&I Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $1,267 $816 $2,083 $62 $— $16 $16 $2,161 Provision 68 21 89 10 — 1 1 100 Ending Balance $1,335 $837 $2,172 $72 $— $17 $17 $2,261 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, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations	Nature of Operations The Bancorp is a publicly-owned registered bank holding company that has elected to be a financial holding company. The Bancorp’s principal subsidiary is the Bank, a Rhode Island chartered financial institution founded in 1800. The Bank is the oldest community bank in the nation and the largest state-chartered bank headquartered in Rhode Island. Washington Trust offers a full range of financial services, including commercial, residential and consumer lending, retail and commercial deposit products, and wealth management and trust services through its offices in Rhode Island, Massachusetts and Connecticut.
Basis of Presentation	Basis of Presentation The accounting and reporting policies of the Washington Trust conform to GAAP and to general practices of the banking industry. The Unaudited Consolidated Financial Statements of the Corporation presented herein have been prepared pursuant to the rules of the SEC for quarterly reports on Form 10-Q and do not include all of the information and note disclosures required by GAAP for complete financial statements. 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, 2022. The Unaudited Consolidated Financial Statements include the accounts of the Bancorp and its wholly-owned subsidiaries, except subsidiaries that are not deemed necessary to be consolidated. Intercompany balances and transactions have been eliminated in consolidation. The Bancorp 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 trusts’ 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, which is classified in other assets, and the junior subordinated debentures are included in the Unaudited Consolidated Balance Sheets. Interest expense on the junior subordinated debentures is included in the Unaudited Consolidated Statements of Income.
Use of Estimates	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. Management considers the ACL on loans to be a material estimate that is particularly susceptible to change.

Securities (Tables)

Securities (Tables)	3 Months Ended
	Mar. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Summary of Investments	The following tables present the amortized cost, gross unrealized holding gains, gross unrealized holding losses, ACL on securities and fair value of securities by major security type and class of security: (Dollars in thousands) March 31, 2023 Amortized Cost Unrealized Gains Unrealized Losses ACL Fair Value Available for Sale Debt Securities: Obligations of U.S. government-sponsored enterprises $250,952 $— ($28,288) $— $222,664 Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 936,280 352 (124,762) — 811,870 Individual name issuer trust preferred debt securities 9,390 — (690) — 8,700 Corporate bonds 13,172 — (1,659) — 11,513 Total available for sale debt securities $1,209,794 $352 ($155,399) $— $1,054,747 (Dollars in thousands) December 31, 2022 Amortized Cost Unrealized Gains Unrealized Losses ACL Fair Value Available for Sale Debt Securities: Obligations of U.S. government-sponsored enterprises $231,203 $1 ($31,622) $— $199,582 Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 912,581 269 (138,748) — 774,102 Individual name issuer trust preferred debt securities 9,387 — (627) — 8,760 Corporate bonds 13,169 — (1,685) — 11,484 Total available for sale debt securities $1,166,340 $270 ($172,682) $— $993,928
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, 2023 Amortized Cost Fair Value Due in one year or less $106,939 $92,740 Due after one year to five years 464,167 405,495 Due after five years to ten years 381,590 333,522 Due after ten years 257,098 222,990 Total debt securities $1,209,794 $1,054,747
Securities in a Continuous Unrealized Loss Position	The following tables summarize available for sale debt securities in an unrealized loss position, for which an ACL 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, 2023 # Fair Unrealized # Fair Unrealized # Fair Unrealized Obligations of U.S. government-sponsored enterprises 4 $49,449 ($551) 19 $173,215 ($27,737) 23 $222,664 ($28,288) Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 44 180,541 (5,539) 121 618,269 (119,223) 165 798,810 (124,762) Individual name issuer trust preferred debt securities — — — 3 8,700 (690) 3 8,700 (690) Corporate bonds — — — 4 11,513 (1,659) 4 11,513 (1,659) Total 48 $229,990 ($6,090) 147 $811,697 ($149,309) 195 $1,041,687 ($155,399) (Dollars in thousands) Less than 12 Months 12 Months or Longer Total December 31, 2022 # Fair Unrealized # Fair Unrealized # Fair Unrealized Obligations of U.S. government-sponsored enterprises 4 $20,115 ($638) 18 $169,466 ($30,984) 22 $189,581 ($31,622) Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 95 288,777 (24,960) 66 471,355 (113,788) 161 760,132 (138,748) Individual name issuer trust preferred debt securities — — — 3 8,760 (627) 3 8,760 (627) Corporate bonds — — — 4 11,484 (1,685) 4 11,484 (1,685) Total 99 $308,892 ($25,598) 91 $661,065 ($147,084) 190 $969,957 ($172,682)

Loans (Tables)

Loans (Tables)	3 Months Ended
	Mar. 31, 2023
Receivables [Abstract]
Summary of Loans	The following table presents a summary of loans: (Dollars in thousands) March 31, December 31, 2022 Commercial: Commercial real estate (1) $1,909,136 $1,829,304 Commercial & industrial (2) 609,720 656,397 Total commercial 2,518,856 2,485,701 Residential Real Estate: Residential real estate (3) 2,403,255 2,323,002 Consumer: Home equity 288,878 285,715 Other (4) 16,980 15,721 Total consumer 305,858 301,436 Total loans (5) $5,227,969 $5,110,139 (1) 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) C&I consists of loans to businesses and individuals, a portion of which are fully or partially collateralized by real estate. (3) Residential real estate consists of mortgage and homeowner construction loans secured by one- to four-family residential properties. (4) Other consists of loans to individuals secured by general aviation aircraft and other personal installment loans. (5) Includes net unamortized loan origination costs of $11.9 million and $11.6 million, respectively, at March 31, 2023 and December 31, 2022 and net unamortized premiums on loans purchased from and serviced by other financial institutions of $310 thousand and $318 thousand, respectively, at March 31, 2023 and December 31, 2022.
Past Due Loans	The following tables present an aging analysis of past due loans, segregated by class of loans: (Dollars in thousands) Days Past Due March 31, 2023 30-59 60-89 Over 90 Total Past Due Current Total Loans Commercial: Commercial real estate $1,188 $— $— $1,188 $1,907,948 $1,909,136 Commercial & industrial 5 — 224 229 609,491 609,720 Total commercial 1,193 — 224 1,417 2,517,439 2,518,856 Residential Real Estate: Residential real estate 2,581 643 2,506 5,730 2,397,525 2,403,255 Consumer: Home equity 770 63 — 833 288,045 288,878 Other 15 — — 15 16,965 16,980 Total consumer 785 63 — 848 305,010 305,858 Total loans $4,559 $706 $2,730 $7,995 $5,219,974 $5,227,969 (Dollars in thousands) Days Past Due December 31, 2022 30-59 60-89 Over 90 Total Past Due Current Total Loans Commercial: Commercial real estate $1,187 $— $— $1,187 $1,828,117 $1,829,304 Commercial & industrial 265 — — 265 656,132 656,397 Total commercial 1,452 — — 1,452 2,484,249 2,485,701 Residential Real Estate: Residential real estate 4,793 303 3,779 8,875 2,314,127 2,323,002 Consumer: Home equity 1,103 132 — 1,235 284,480 285,715 Other 16 — — 16 15,705 15,721 Total consumer 1,119 132 — 1,251 300,185 301,436 Total loans $7,364 $435 $3,779 $11,578 $5,098,561 $5,110,139 Included in past due loans as of March 31, 2023 and December 31, 2022, were nonaccrual loans of $5.6 million and $7.2 million, respectively. In addition, all loans 90 days or more past due at March 31, 2023 and December 31, 2022 were classified as nonaccrual.
Nonaccrual Loans	The following table is a summary of nonaccrual loans, segregated by class of loans: (Dollars in thousands) Mar 31, Dec 31, Commercial: Commercial real estate $1,601 $— Commercial & industrial 920 — Total commercial 2,521 — Residential Real Estate: Residential real estate 10,470 11,894 Consumer: Home equity 989 952 Other — — Total consumer 989 952 Total nonaccrual loans $13,980 $12,846 Accruing loans 90 days or more past due $— $— The following table presents interest income recognized on nonaccrual loans: (Dollars in thousands) Three months ended March 31, 2023 2022 Commercial: Commercial real estate $27 $— Commercial & industrial 13 — Total commercial 40 — Residential Real Estate: Residential real estate 173 101 Consumer: Home equity 22 7 Other 1 — Total consumer 23 7 Total $236 $108
Collateral Dependent Individually Analyzed Loans	The following table presents the carrying value of collateral dependent individually analyzed loans: (Dollars in thousands) March 31, 2023 December 31, 2022 Carrying Value Related Allowance Carrying Value Related Allowance Commercial: Commercial real estate (1) $2,096 $308 $2,103 $— Commercial & industrial (2) 920 224 — — Total commercial 3,016 532 2,103 — Residential Real Estate: Residential real estate (3) 4,614 — 5,760 — Consumer: Home equity (3) 592 — 592 — Other — — — — Total consumer 592 — 592 — Total $8,222 $532 $8,455 $— (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 includes information on credit quality indicators and gross charge-offs for the Corporation’s loan portfolio, segregated by class of loans as of March 31, 2023: (Dollars in thousands) Term Loans Amortized Cost by Origination Year 2023 2022 2021 2020 2019 Prior Revolving Loans Amortized Cost Revolving Loans Converted to Term Loans Total Commercial: CRE: Pass $74,365 $556,396 $394,005 $179,602 $168,940 $413,854 $8,931 $1,154 $1,797,247 Special Mention 20,487 — 22,302 668 27,761 38,968 102 — 110,288 Classified — — — — — 1,601 — — 1,601 Total CRE 94,852 556,396 416,307 180,270 196,701 454,423 9,033 1,154 1,909,136 CRE gross charge-offs — — — — — — — — — C&I: Pass 4,116 120,221 59,156 67,621 82,807 167,451 91,060 979 593,411 Special Mention 11,529 836 — — 185 1,412 1,427 — 15,389 Classified — — 224 — 696 — — — 920 Total C&I 15,645 121,057 59,380 67,621 83,688 168,863 92,487 979 609,720 C&I gross charge-offs (1) 11 — — — — — — — 11 Residential Real Estate: Residential real estate: Current 108,758 836,112 700,923 272,006 120,896 358,830 — — 2,397,525 Past Due — — 392 530 1,406 3,402 — — 5,730 Total residential real estate 108,758 836,112 701,315 272,536 122,302 362,232 — — 2,403,255 Residential real estate gross charge-offs — — — — — — — — — Consumer: Home equity: Current 5,140 18,965 7,993 3,585 2,319 5,344 234,279 10,420 288,045 Past Due — — — — — 63 317 453 833 Total home equity 5,140 18,965 7,993 3,585 2,319 5,407 234,596 10,873 288,878 Home equity gross charge-offs — — — — — — — — — Other: Current 1,951 4,180 4,204 1,427 217 4,764 222 — 16,965 Past Due 15 — — — — — — — 15 Total other 1,966 4,180 4,204 1,427 217 4,764 222 — 16,980 Other gross charge-offs (1) 42 — 8 — — — — — 50 Total loans $226,361 $1,536,710 $1,189,199 $525,439 $405,227 $995,689 $336,338 $13,006 $5,227,969 Total gross charge-offs $53 $— $8 $— $— $— $— $— $61 (1) Gross charge-offs in 2023 represent charge-offs of business and consumer account overdraft balances. The following table includes information on credit quality indicators for the Corporation’s loan portfolio, segregated by class of loans as of December 31, 2022: (Dollars in thousands) Term Loans Amortized Cost by Origination Year 2022 2021 2020 2019 2018 Prior Revolving Loans Amortized Cost Revolving Loans Converted to Term Loans Total Commercial: CRE: Pass $591,596 $383,062 $177,286 $170,259 $148,371 $242,061 $6,243 $1,437 $1,720,315 Special Mention 20,579 22,324 328 24,270 28,676 10,564 146 — 106,887 Classified — — 503 — 1,187 412 — — 2,102 Total CRE 612,175 405,386 178,117 194,529 178,234 253,037 6,389 1,437 1,829,304 C&I: Pass 127,152 63,180 71,265 86,470 85,011 114,241 90,987 745 639,051 Special Mention 13,566 — — — 1,427 — 1,426 — 16,419 Classified — 225 — 7 — — 695 — 927 Total C&I 140,718 63,405 71,265 86,477 86,438 114,241 93,108 745 656,397 Residential Real Estate: Residential real estate: Current 838,566 707,760 277,613 123,098 72,541 294,549 — — 2,314,127 Past Due — 600 — 266 2,315 5,694 — — 8,875 Total residential real estate 838,566 708,360 277,613 123,364 74,856 300,243 — — 2,323,002 Consumer: Home equity: Current 20,665 8,308 3,742 2,406 1,947 3,139 235,004 9,268 284,479 Past Due — — — — 68 98 548 522 1,236 Total home equity 20,665 8,308 3,742 2,406 2,015 3,237 235,552 9,790 285,715 Other: Current 4,231 4,287 1,676 299 235 4,726 251 — 15,705 Past Due 16 — — — — — — — 16 Total other 4,247 4,287 1,676 299 235 4,726 251 — 15,721 Total Loans $1,616,371 $1,189,746 $532,413 $407,075 $341,778 $675,484 $335,300 $11,972 $5,110,139 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_2

Allowance for Credit Losses on Loans (Tables)	3 Months Ended
	Mar. 31, 2023
Credit Loss [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, 2023: (Dollars in thousands) Commercial Consumer CRE C&I Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $18,435 $10,356 $28,791 $7,740 $1,115 $381 $1,496 $38,027 Charge-offs — (11) (11) — — (50) (50) (61) Recoveries — 5 5 — 1 8 9 14 Provision 2,939 (517) 2,422 (1,501) (138) 17 (121) 800 Ending Balance $21,374 $9,833 $31,207 $6,239 $978 $356 $1,334 $38,780 The following table presents the activity in the ACL on loans for the three months ended March 31, 2022: (Dollars in thousands) Commercial Consumer CRE C&I Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $18,933 $10,832 $29,765 $7,860 $1,069 $394 $1,463 $39,088 Charge-offs — (5) (5) — — (31) (31) (36) Recoveries 145 6 151 21 2 10 12 184 Provision (618) 389 (229) 185 27 17 44 — Ending Balance $18,460 $11,222 $29,682 $8,066 $1,098 $390 $1,488 $39,236

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Value of Derivatives by Balance Sheet Location	The following table presents the notional amounts and fair values of derivative instruments in the Unaudited Consolidated Balance Sheets: (Dollars in thousands) March 31, 2023 December 31, 2022 Fair Value Fair Value Notional Amounts Derivative Assets Derivative Liabilities Notional Amounts Derivative Assets Derivative Liabilities Derivatives Designated as Cash Flow Hedging Instruments: Interest rate risk management contracts: Interest rate swaps (1) $20,000 $405 $— $320,000 $548 $31,178 Derivatives not Designated as Hedging Instruments: Loan related derivative contracts: Interest rate contracts with customers 933,832 1,131 53,185 935,099 32 68,137 Mirror contracts with counterparties 933,832 52,875 1,260 935,099 67,797 61 Risk participation agreements 284,325 — 2 282,191 — 2 Mortgage loan commitments: Interest rate lock commitments 26,489 404 — 12,201 144 4 Forward sale commitments 38,810 12 305 23,150 58 150 Gross amounts 54,827 $54,752 68,579 99,532 Less: amounts offset (2) 1,260 1,260 23,524 23,524 Derivative balances, net of offset 53,567 53,492 45,055 76,008 Less: collateral pledged (3) — — — 7,716 Net amounts $53,567 $53,492 $45,055 $68,292 (1) The fair value of derivative assets includes accrued interest receivable of $25 thousand and $24 thousand, respectively, at March 31, 2023 and December 31, 2022. The fair value of derivative liabilities includes accrued interest payable $856 thousand at December 31, 2022. (2) Interest rate risk management contracts and loan related derivative contracts with counterparties are subject to master netting arrangements. (3) Collateral pledged to derivative counterparties is in the form of cash. Washington Trust may need to post additional collateral in the future in proportion to potential increases in unrealized loss positions.
Derivative Instruments Effect in Statements of Income and Changes in Shareholders' Equity	The following table presents the effect of derivative instruments in the Unaudited Consolidated Statements of Changes in Shareholders’ Equity: (Dollars in thousands) Gain (Loss) Recognized in Three months ended March 31, 2023 2022 Derivatives Designated as Cash Flow Hedging Instruments: Interest rate risk management contracts: Interest rate swaps $2,797 ($10,335) Total $2,797 ($10,335) For derivatives designated as cash flow hedging instruments, see Note 14 for additional disclosure pertaining to the amounts and location of reclassifications from AOCL into earnings. The following table presents the effect of derivative instruments in the Unaudited Consolidated Statements of Income: (Dollars in thousands) Amount of Gain (Loss) Three months ended March 31, Statement of Income Location 2023 2022 Derivatives not Designated as Hedging Instruments: Loan related derivative contracts: Interest rate contracts with customers Loan related derivative income $11,132 ($40,822) Mirror interest rate contracts with counterparties Loan related derivative income (11,171) 41,122 Risk participation agreements Loan related derivative income (11) 1 Mortgage loan commitments: Interest rate lock commitments Mortgage banking revenues 263 (934) Forward sale commitments Mortgage banking revenues (124) 2,991 Total $89 $2,358

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2023
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 $7,445 $8,987 Aggregate principal balance 7,295 8,860 Difference between fair value and principal balance $150 $127
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, 2023 Assets: Available for sale debt securities: Obligations of U.S. government-sponsored enterprises $222,664 $— $222,664 $— Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 811,870 — 811,870 — Individual name issuer trust preferred debt securities 8,700 — 8,700 — Corporate bonds 11,513 — 11,513 — Mortgage loans held for sale 7,445 — 7,445 — Derivative assets 53,567 — 53,567 — Total assets at fair value on a recurring basis $1,115,759 $— $1,115,759 $— Liabilities: Derivative liabilities $53,492 $— $53,492 $— Total liabilities at fair value on a recurring basis $53,492 $— $53,492 $— (Dollars in thousands) Total Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs December 31, 2022 Assets: Available for sale debt securities: Obligations of U.S. government-sponsored enterprises $199,582 $— $199,582 $— Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises 774,102 — 774,102 — Individual name issuer trust preferred debt securities 8,760 — 8,760 — Corporate bonds 11,484 — 11,484 — Mortgage loans held for sale 8,987 — 8,987 — Derivative assets 45,055 — 45,055 — Total assets at fair value on a recurring basis $1,047,970 $— $1,047,970 $— Liabilities: Derivative liabilities $76,008 $— $76,008 $— Total liabilities at fair value on a recurring basis $76,008 $— $76,008 $—
Items Recorded at Fair Value on a Nonrecurring Basis	The following table presents the carrying value of assets held at March 31, 2023, which were written down to fair value during the three months ended March 31, 2023: (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 $1,292 $— $— $1,292 Total assets at fair value on a nonrecurring basis $1,292 $— $— $1,292 There were no assets written down to fair value during the twelve months ended December 31, 2022.
Quantitative Information About Level 3 Assets Measured at Fair Value on a Nonrecurring Basis	The following table presents 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, 2023 Collateral dependent individually analyzed loans $1,292 Appraisals of collateral Discount for costs to sell 0% - 47% (43%) Appraisal adjustments 0% - 100% (9%)
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, BOLI, non-maturity deposits and accrued interest payable. The Corporation considers cash and cash equivalents, accrued interest receivable and accrued interest payable as level 1 measurements within the fair value hierarchy. The Corporation considers FHLB stock, BOLI and non-maturity deposits as level 2 measurements. (Dollars in thousands) March 31, 2023 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 $5,189,189 $5,044,231 $— $— $5,044,231 Financial Liabilities: Time deposits $1,531,835 $1,558,899 $— $1,558,899 $— FHLB advances 925,000 925,350 — 925,350 — Junior subordinated debentures 22,681 18,558 — 18,558 — (Dollars in thousands) December 31, 2022 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 $5,072,112 $4,929,449 $— $— $4,929,449 Financial Liabilities: Time deposits $1,122,882 $1,137,219 $— $1,137,219 $— FHLB advances 980,000 978,590 — 978,590 — Junior subordinated debentures 22,681 18,963 — 18,963 —

Deposits (Tables)

Deposits (Tables)	3 Months Ended
	Mar. 31, 2023
Deposits [Abstract]
Summary of Deposits	The following table presents a summary of deposits: (Dollars in thousands) Mar 31, 2023 Dec 31, 2022 Noninterest-bearing: Demand deposits $829,763 $858,953 Interest-bearing: Interest-bearing demand deposits (1) 319,598 333,197 NOW accounts 828,700 871,875 Money market accounts 1,214,014 1,255,805 Savings accounts 544,604 576,250 Time deposits (2) 1,531,835 1,122,882 Total interest-bearing deposits $4,438,751 $4,160,009 Total deposits $5,268,514 $5,018,962 (1) Includes wholesale brokered demand deposit balances of $1,233 and $31,153, respectively, as of March 31, 2023 and December 31, 2022. (2) Includes wholesale brokered time deposit balances of $607,329 and $327,044, respectively, as of March 31, 2023 and December 31, 2022.
Schedule of Time Certificates of Deposit Maturities	The following table presents scheduled maturities of time certificates of deposit: (Dollars in thousands) Scheduled Maturity Weighted Average Rate April 1, 2023 to December 31, 2023 $945,304 3.44 % 2024 386,027 3.86 2025 112,789 2.99 2026 39,901 1.98 2027 33,817 2.88 2028 and thereafter 13,997 3.68 Balance at December 31, 2023 $1,531,835 3.46 %

Borrowings (Tables)

Borrowings (Tables)	3 Months Ended
	Mar. 31, 2023
Debt Disclosure [Abstract]
FHLB Advances Maturity Summary	The following table presents maturities and weighted average interest rates on FHLB advances outstanding as of March 31, 2023: (Dollars in thousands) Scheduled Weighted April 1, 2023 to December 31, 2023 $665,000 4.72 % 2024 40,000 4.56 2025 80,000 4.29 2026 90,000 4.31 2027 20,000 4.13 2028 and thereafter 30,000 4.12 Balance at March 31, 2023 $925,000 4.60 %

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2023
Equity [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, 2023 Total Capital (to Risk-Weighted Assets): Corporation $601,662 12.01 % $400,831 8.00 % N/A N/A Bank 584,596 11.67 400,723 8.00 $500,904 10.00 % Tier 1 Capital (to Risk-Weighted Assets): Corporation 565,329 11.28 300,623 6.00 N/A N/A Bank 548,263 10.95 300,542 6.00 400,723 8.00 Common Equity Tier 1 Capital (to Risk-Weighted Assets): Corporation 543,333 10.84 225,467 4.50 N/A N/A Bank 548,263 10.95 225,407 4.50 325,587 6.50 Tier 1 Capital (to Average Assets): (1) Corporation 565,329 8.25 273,951 4.00 N/A N/A Bank 548,263 8.01 273,868 4.00 342,336 5.00 December 31, 2022 Total Capital (to Risk-Weighted Assets): Corporation 605,005 12.37 391,363 8.00 N/A N/A Bank 588,090 12.02 391,260 8.00 489,074 10.00 Tier 1 Capital (to Risk-Weighted Assets): Corporation 571,794 11.69 293,522 6.00 N/A N/A Bank 554,879 11.35 293,445 6.00 391,260 8.00 Common Equity Tier 1 Capital (to Risk-Weighted Assets): Corporation 549,798 11.24 220,142 4.50 N/A N/A Bank 554,879 11.35 220,083 4.50 317,898 6.50 Tier 1 Capital (to Average Assets): (1) Corporation 571,794 8.65 264,295 4.00 N/A N/A Bank 554,879 8.40 264,177 4.00 330,222 5.00 (1) Leverage ratio.

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	3 Months Ended
	Mar. 31, 2023
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, 2023 2022 (Dollars in thousands) Revenue (1) ASC 606 Revenue (2) Revenue (1) ASC 606 Revenue (2) Net interest income $37,193 $— $35,091 $— Noninterest income: Wealth management revenues 8,663 8,663 10,531 10,531 Mortgage banking revenues 1,245 — 3,501 — Card interchange fees 1,132 1,132 1,164 1,164 Service charges on deposit accounts 777 777 668 668 Loan related derivative income (51) — 301 — Income from bank-owned life insurance 1,165 — 601 — Other income 352 276 393 286 Total noninterest income 13,283 10,848 17,159 12,649 Total revenues $50,476 $10,848 $52,250 $12,649 (1) As reported in the Unaudited Consolidated Statements of Income. (2) Revenue from contracts with customers in scope of ASC 606. The following table presents revenue from contracts with customers based on the timing of revenue recognition: (Dollars in thousands) Three months ended March 31, 2023 2022 Revenue recognized at a point in time: Card interchange fees $1,132 $1,164 Service charges on deposit accounts 558 549 Other income 216 229 Revenue recognized over time: Wealth management revenues 8,663 10,531 Service charges on deposit accounts 219 119 Other income 60 57 Total revenues from contracts in scope of Topic 606 $10,848 $12,649

Defined Benefit Pension Plans (

Defined Benefit Pension Plans (Tables)	3 Months Ended
	Mar. 31, 2023
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, 2023 2022 2023 2022 Net Periodic Benefit Cost: Service cost (1) $351 $516 $39 $54 Interest cost (2) 884 592 176 106 Expected return on plan assets (2) (1,147) (1,159) — — Recognized net actuarial loss (2) — 255 59 173 Net periodic benefit cost $88 $204 $274 $333 (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, 2023 2022 2023 2022 Measurement date Dec 31, 2022 Dec 31, 2021 Dec 31, 2022 Dec 31, 2021 Equivalent single discount rate for benefit obligations 5.54% 3.00% 5.50% 2.89% Equivalent single discount rate for service cost 5.60 3.11 5.61 3.16 Equivalent single discount rate for interest cost 5.43 2.67 5.40 2.48 Expected long-term return on plan assets 5.25 5.25 N/A N/A Rate of compensation increase 5.00 3.75 5.00 3.75

Business Segments (Tables)

Business Segments (Tables)	3 Months Ended
	Mar. 31, 2023
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 Consolidated Total Three months ended March 31, 2023 2022 2023 2022 2023 2022 Net interest income (expense) $37,180 $35,108 $13 ($17) $37,193 $35,091 Provision for credit losses 800 100 — — 800 100 Net interest income (expense) after provision for credit losses 36,380 35,008 13 (17) 36,393 34,991 Noninterest income 4,431 6,512 8,852 10,647 13,283 17,159 Noninterest expenses: Depreciation and amortization expense 831 711 356 344 1,187 1,055 Other noninterest expenses 24,635 22,611 7,742 7,553 32,377 30,164 Total noninterest expenses 25,466 23,322 8,098 7,897 33,564 31,219 Income before income taxes 15,345 18,198 767 2,733 16,112 20,931 Income tax expense 3,087 3,797 213 651 3,300 4,448 Net income $12,258 $14,401 $554 $2,082 $12,812 $16,483 Total assets at period end $6,785,254 $5,773,796 $73,928 $74,203 $6,859,182 $5,847,999 Expenditures for long-lived assets 1,136 730 8 104 1,144 834

Other Comprehensive Income (L_2

Other Comprehensive Income (Loss) (Tables)	3 Months Ended
	Mar. 31, 2023
Equity [Abstract]
Activity in Other Comprehensive Income (Loss)	The following table presents the activity in other comprehensive income (loss): Three months ended March 31, 2023 2022 (Dollars in thousands) Pre-tax Amounts Income Tax Benefit (Expense) Net of Tax Pre-tax Amounts Income Tax Benefit (Expense) Net of Tax Available for Sale Debt Securities: Change in fair value of available for sale debt securities $17,365 ($4,167) $13,198 ($65,078) $15,618 ($49,460) Cash Flow Hedges: Change in fair value of cash flow hedges 1,046 (251) 795 (13,201) 3,168 (10,033) Net cash flow hedge losses (gains) reclassified into earnings (1) 2,636 (634) 2,002 (399) 97 (302) Net change in fair value of cash flow hedges 3,682 (885) 2,797 (13,600) 3,265 (10,335) Defined Benefit Plan Obligations: Amortization of net actuarial losses (2) 59 (14) 45 428 (103) 325 Total other comprehensive income (loss) $21,106 ($5,066) $16,040 ($78,250) $18,780 ($59,470) (1) For the three months ended March 31, 2023 and 2022, the pre-tax amounts reclassified into earnings in the Unaudited Consolidated Statements of Income include a reduction of $2.8 million and an increase of $493 thousand, respectively, in interest and fees on loans, as well as a reduction of $127 thousand and an increase of $94 thousand, respectively, in FHLB interest expense. (2) The pre-tax amounts are included in other expenses in the Unaudited Consolidated Statements of Income.
Changes in Components of Accumulated Other Comprehensive Income (Loss)	The following tables present the changes in AOCL by component, net of tax: (Dollars in thousands) Net Unrealized Losses on Available For Sale Debt Securities Net Unrealized Losses on Cash Flow Hedges Net Unrealized Losses on Defined Benefit Plan Obligations Total For the three months ended March 31, 2023 Balance at December 31, 2022 ($131,033) ($22,645) ($4,122) ($157,800) Other comprehensive income before reclassifications 13,198 795 — 13,993 Amounts reclassified from accumulated other comprehensive loss — 2,002 45 2,047 Net other comprehensive income 13,198 2,797 45 16,040 Balance at March 31, 2023 ($117,835) ($19,848) ($4,077) ($141,760) (Dollars in thousands) Net Unrealized Losses on Available For Sale Debt Securities Net Unrealized Losses on Cash Flow Hedges Net Unrealized Losses on Defined Benefit Plan Obligations Total For the three months ended March 31, 2022 Balance at December 31, 2021 ($6,795) ($4,013) ($9,173) ($19,981) Other comprehensive loss before reclassifications (49,460) (10,033) — (59,493) Amounts reclassified from accumulated other comprehensive loss — (302) 325 23 Net other comprehensive (loss) income (49,460) (10,335) 325 (59,470) Balance at March 31, 2022 ($56,255) ($14,348) ($8,848) ($79,451)

Earnings per Common Share (Tabl

Earnings per Common Share (Tables)	3 Months Ended
	Mar. 31, 2023
Earnings Per Share [Abstract]
Calculation of Earnings per Share	The following table presents the calculation of EPS: (Dollars and shares in thousands, except per share amounts) Three months ended March 31, 2023 2022 Earnings for basic and diluted earnings per common share: Net income $12,812 $16,483 Less: dividends and undistributed earnings allocated to participating securities (29) (54) Net income available to common shareholders $12,783 $16,429 Shares: Weighted average common shares outstanding 17,074 17,331 Dilutive effect of common stock equivalents 96 151 Weighted average diluted common shares outstanding 17,170 17,482 Earnings per common share: Basic earnings per common share $0.75 $0.95 Diluted earnings per common share $0.74 $0.94

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2023
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: $1,409,788 $1,308,873 Standby letters of credit 9,696 9,028 Financial instruments whose notional amounts exceed the amounts of credit risk: Mortgage loan commitments: Interest rate lock commitments 26,489 12,201 Forward sale commitments 38,810 23,150 Loan related derivative contracts: Interest rate contracts with customers 933,832 935,099 Mirror interest rate contracts with counterparties 933,832 935,099 Risk participation-in agreements 221,634 221,247 Interest rate risk management contracts: Interest rate swaps 20,000 320,000
Allowance for Credit Losses on Unfunded Commitments Rollforward	The activity in the ACL on unfunded commitments for the three months ended March 31, 2023 is presented below: (Dollars in thousands) Commercial Consumer CRE C&I Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $1,236 $988 $2,224 $50 $— $16 $16 $2,290 Provision 132 (105) 27 (25) — (2) (2) — Ending Balance $1,368 $883 $2,251 $25 $— $14 $14 $2,290 The activity in the ACL on unfunded commitments for the three months ended March 31, 2022 is presented below: (Dollars in thousands) Commercial Consumer CRE C&I Total Commercial Residential Real Estate Home Equity Other Total Consumer Total Beginning Balance $1,267 $816 $2,083 $62 $— $16 $16 $2,161 Provision 68 21 89 10 — 1 1 100 Ending Balance $1,335 $837 $2,172 $72 $— $17 $17 $2,261

Securities (Narrative) (Details

Securities (Narrative) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($) security	Dec. 31, 2022 USD ($) security
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Accrued interest receivable	$ 3,100	$ 3,100
Amortized cost of callable debt securities	273,000
Fair value of callable debt securities	$ 242,400
Available for sale debt securities, securities in continuous unrealized loss position, number of securities | security	195	190
Available for sale debt securities, fair value	$ 1,054,747	$ 993,928
Asset Pledged as Collateral
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Available for sale debt securities, fair value	$ 306,600	$ 294,800
Individual name issuer trust preferred debt securities
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Available for sale debt securities, securities in continuous unrealized loss position, number of securities | security	3	3
Securities in unrealized loss position, number of companies issuing securities | security	3
Number of debt securities below investment grade | security	1
Amortized cost of securities below investment grade	$ 2,000
Unrealized losses on securities below investment grade	(135)
Available for sale debt securities, fair value	$ 8,700	$ 8,760
Corporate bonds [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Available for sale debt securities, securities in continuous unrealized loss position, number of securities | security	4	4
Securities in unrealized loss position, number of companies issuing securities | security	3
Number of debt securities below investment grade | security	1
Amortized cost of securities below investment grade	$ 2,000
Unrealized losses on securities below investment grade	(160)
Available for sale debt securities, fair value	$ 11,513	$ 11,484
Minimum [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Maturity period of callable debt securities	1 year
Call features of callable debt securities	1 month
Maximum [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Maturity period of callable debt securities	14 years
Call features of callable debt securities	16 months

Securities (Summary of Investme

Securities (Summary of Investments) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Available for sale debt securities, amortized cost	$ 1,209,794	$ 1,166,340
Available for sale debt securities, unrealized gains	352	270
Available for sale debt securities, unrealized losses	(155,399)	(172,682)
Available for sale debt securities, allowance for credit losses	0	0
Available for sale debt securities, fair value	1,054,747	993,928
Obligations of U.S. government-sponsored enterprises [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Available for sale debt securities, amortized cost	250,952	231,203
Available for sale debt securities, unrealized gains	0	1
Available for sale debt securities, unrealized losses	(28,288)	(31,622)
Available for sale debt securities, allowance for credit losses	0	0
Available for sale debt securities, fair value	222,664	199,582
Mortgage-backed securities issued by U.S. government-sponsored agencies and U.S. government-sponsored enterprises [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Available for sale debt securities, amortized cost	936,280	912,581
Available for sale debt securities, unrealized gains	352	269
Available for sale debt securities, unrealized losses	(124,762)	(138,748)
Available for sale debt securities, allowance for credit losses	0	0
Available for sale debt securities, fair value	811,870	774,102
Individual name issuer trust preferred debt securities
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Available for sale debt securities, amortized cost	9,390	9,387
Available for sale debt securities, unrealized gains	0	0
Available for sale debt securities, unrealized losses	(690)	(627)
Available for sale debt securities, allowance for credit losses	0	0
Available for sale debt securities, fair value	8,700	8,760
Corporate bonds [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Available for sale debt securities, amortized cost	13,172	13,169
Available for sale debt securities, unrealized gains	0	0
Available for sale debt securities, unrealized losses	(1,659)	(1,685)
Available for sale debt securities, allowance for credit losses	0	0
Available for sale debt securities, fair value	$ 11,513	$ 11,484

Securities (Securities by Contr

Securities (Securities by Contractual Maturity) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Available for sale debt securities maturities within 1 year amortized cost	$ 106,939
Available for sale debt securities maturities 1-5 years amortized cost	464,167
Available for sale debt securities maturities 5-10 years amortized cost	381,590
Available for sale debt securities maturities after 10 years amortized cost	257,098
Available for sale debt securities maturities total amortized cost	1,209,794	$ 1,166,340
Available for sale debt securities maturities within 1 year fair value	92,740
Available for sale debt securities maturities 1-5 years fair value	405,495
Available for sale debt securities maturities 5-10 years fair value	333,522
Available for sale debt securities maturities after 10 years fair value	222,990
Available for sale debt securities, fair value	$ 1,054,747	$ 993,928

Securities (Securities in a Con

Securities (Securities in a Continuous Unrealized Loss Position) (Details) $ in Thousands	Mar. 31, 2023 USD ($) security	Dec. 31, 2022 USD ($) security
Debt Securities, Available-for-sale [Line Items]
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, number of securities | security	48	99
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, fair value	$ 229,990	$ 308,892
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, unrealized losses	$ 6,090	$ 25,598
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, number of securities | security	147	91
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, fair value	$ 811,697	$ 661,065
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, unrealized losses	$ 149,309	$ 147,084
Available for sale debt securities, securities in continuous unrealized loss position, number of securities | security	195	190
Available for sale debt securities, securities in continuous unrealized loss position, fair value	$ 1,041,687	$ 969,957
Available for sale debt securities, securities in continuous unrealized loss position, unrealized losses	$ 155,399	$ 172,682
Obligations of U.S. government-sponsored enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, number of securities | security	4	4
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, fair value	$ 49,449	$ 20,115
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, unrealized losses	$ 551	$ 638
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, number of securities | security	19	18
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, fair value	$ 173,215	$ 169,466
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, unrealized losses	$ 27,737	$ 30,984
Available for sale debt securities, securities in continuous unrealized loss position, number of securities | security	23	22
Available for sale debt securities, securities in continuous unrealized loss position, fair value	$ 222,664	$ 189,581
Available for sale debt securities, securities in continuous unrealized loss position, unrealized losses	$ 28,288	$ 31,622
Mortgage-backed securities issued by U.S. government-sponsored agencies and U.S. government-sponsored enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, number of securities | security	44	95
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, fair value	$ 180,541	$ 288,777
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, unrealized losses	$ 5,539	$ 24,960
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, number of securities | security	121	66
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, fair value	$ 618,269	$ 471,355
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, unrealized losses	$ 119,223	$ 113,788
Available for sale debt securities, securities in continuous unrealized loss position, number of securities | security	165	161
Available for sale debt securities, securities in continuous unrealized loss position, fair value	$ 798,810	$ 760,132
Available for sale debt securities, securities in continuous unrealized loss position, unrealized losses	$ 124,762	$ 138,748
Individual name issuer trust preferred debt securities
Debt Securities, Available-for-sale [Line Items]
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, number of securities | security	0	0
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, fair value	$ 0	$ 0
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, unrealized losses	$ 0	$ 0
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, number of securities | security	3	3
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, fair value	$ 8,700	$ 8,760
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, unrealized losses	$ 690	$ 627
Available for sale debt securities, securities in continuous unrealized loss position, number of securities | security	3	3
Available for sale debt securities, securities in continuous unrealized loss position, fair value	$ 8,700	$ 8,760
Available for sale debt securities, securities in continuous unrealized loss position, unrealized losses	$ 690	$ 627
Corporate bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, number of securities | security	0	0
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, fair value	$ 0	$ 0
Available for sale debt securities, securities in continuous unrealized loss position, less than 12 months, unrealized losses	$ 0	$ 0
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, number of securities | security	4	4
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, fair value	$ 11,513	$ 11,484
Available for sale debt securities, securities in continuous unrealized loss position, greater than 12 months, unrealized losses	$ 1,659	$ 1,685
Available for sale debt securities, securities in continuous unrealized loss position, number of securities | security	4	4
Available for sale debt securities, securities in continuous unrealized loss position, fair value	$ 11,513	$ 11,484
Available for sale debt securities, securities in continuous unrealized loss position, unrealized losses	$ 1,659	$ 1,685

Loans (Narrative) (Details)

Loans (Narrative) (Details) - USD ($) $ in Thousands		Mar. 31, 2023	Dec. 31, 2022
Accrued interest receivable on loans		$ 19,000	$ 17,600
Total loans	[1]	5,227,969	5,110,139
Nonaccrual loans included in past due loans		5,600	7,200
Nonaccrual loans with no ACL		7,100	6,500
Residential loans in process of foreclosure		763	2,900
Nonaccrual loans current on payment		8,300	5,700
Individually analyzed loans		8,200	10,000
Asset Pledged as Collateral
Total loans		2,600,000	2,400,000
Collateral Dependent Individually Analyzed
Total loans		$ 8,222	$ 8,455
[1]Includes net unamortized loan origination costs of $11.9 million and $11.6 million, respectively, at March 31, 2023 and December 31, 2022 and net unamortized premiums on loans purchased from and serviced by other financial institutions of $310 thousand and $318 thousand, respectively, at March 31, 2023 and December 31, 2022.

Loans (Summary of Loans) (Detai

Loans (Summary of Loans) (Details) - USD ($) $ in Thousands		Mar. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	[1]	$ 5,227,969	$ 5,110,139
Net unamortized loan origination costs		11,900	11,600
Net unamortized premiums on purchased loans		310	318
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	[2]	1,909,136	1,829,304
Commercial & Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	[3]	609,720	656,397
Total Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		2,518,856	2,485,701
Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	[4]	2,403,255	2,323,002
Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		288,878	285,715
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	[5]	16,980	15,721
Total Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		$ 305,858	$ 301,436
[1]Includes net unamortized loan origination costs of $11.9 million and $11.6 million, respectively, at March 31, 2023 and December 31, 2022 and net unamortized premiums on loans purchased from and serviced by other financial institutions of $310 thousand and $318 thousand, respectively, at March 31, 2023 and December 31, 2022.[2]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]C&I consists of loans to businesses and individuals, a portion of which are fully or partially collateralized by real estate.[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, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Past due		$ 7,995	$ 11,578
Current		5,219,974	5,098,561
Total loans	[1]	5,227,969	5,110,139
30-59
Financing Receivable, Past Due [Line Items]
Past due		4,559	7,364
60-89
Financing Receivable, Past Due [Line Items]
Past due		706	435
Over 90
Financing Receivable, Past Due [Line Items]
Past due		2,730	3,779
Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Past due		1,188	1,187
Current		1,907,948	1,828,117
Total loans	[2]	1,909,136	1,829,304
Commercial Real Estate | 30-59
Financing Receivable, Past Due [Line Items]
Past due		1,188	1,187
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		229	265
Current		609,491	656,132
Total loans	[3]	609,720	656,397
Commercial & Industrial | 30-59
Financing Receivable, Past Due [Line Items]
Past due		5	265
Commercial & Industrial | 60-89
Financing Receivable, Past Due [Line Items]
Past due		0	0
Commercial & Industrial | Over 90
Financing Receivable, Past Due [Line Items]
Past due		224	0
Total Commercial
Financing Receivable, Past Due [Line Items]
Past due		1,417	1,452
Current		2,517,439	2,484,249
Total loans		2,518,856	2,485,701
Total Commercial | 30-59
Financing Receivable, Past Due [Line Items]
Past due		1,193	1,452
Total Commercial | 60-89
Financing Receivable, Past Due [Line Items]
Past due		0	0
Total Commercial | Over 90
Financing Receivable, Past Due [Line Items]
Past due		224	0
Residential Real Estate
Financing Receivable, Past Due [Line Items]
Past due		5,730	8,875
Current		2,397,525	2,314,127
Total loans	[4]	2,403,255	2,323,002
Residential Real Estate | 30-59
Financing Receivable, Past Due [Line Items]
Past due		2,581	4,793
Residential Real Estate | 60-89
Financing Receivable, Past Due [Line Items]
Past due		643	303
Residential Real Estate | Over 90
Financing Receivable, Past Due [Line Items]
Past due		2,506	3,779
Home Equity
Financing Receivable, Past Due [Line Items]
Past due		833	1,235
Current		288,045	284,480
Total loans		288,878	285,715
Home Equity | 30-59
Financing Receivable, Past Due [Line Items]
Past due		770	1,103
Home Equity | 60-89
Financing Receivable, Past Due [Line Items]
Past due		63	132
Home Equity | Over 90
Financing Receivable, Past Due [Line Items]
Past due		0	0
Other
Financing Receivable, Past Due [Line Items]
Past due		15	16
Current		16,965	15,705
Total loans	[5]	16,980	15,721
Other | 30-59
Financing Receivable, Past Due [Line Items]
Past due		15	16
Other | 60-89
Financing Receivable, Past Due [Line Items]
Past due		0	0
Other | Over 90
Financing Receivable, Past Due [Line Items]
Past due		0	0
Total Consumer
Financing Receivable, Past Due [Line Items]
Past due		848	1,251
Current		305,010	300,185
Total loans		305,858	301,436
Total Consumer | 30-59
Financing Receivable, Past Due [Line Items]
Past due		785	1,119
Total Consumer | 60-89
Financing Receivable, Past Due [Line Items]
Past due		63	132
Total Consumer | Over 90
Financing Receivable, Past Due [Line Items]
Past due		$ 0	$ 0
[1]Includes net unamortized loan origination costs of $11.9 million and $11.6 million, respectively, at March 31, 2023 and December 31, 2022 and net unamortized premiums on loans purchased from and serviced by other financial institutions of $310 thousand and $318 thousand, respectively, at March 31, 2023 and December 31, 2022.[2]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]C&I consists of loans to businesses and individuals, a portion of which are fully or partially collateralized by real estate.[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, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	$ 13,980	$ 12,846
Accruing loans 90 days or more past due	0	0
Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	1,601	0
Commercial & Industrial
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	920	0
Total Commercial
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	2,521	0
Residential Real Estate
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	10,470	11,894
Home Equity
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	989	952
Other
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	0	0
Total Consumer
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	$ 989	$ 952

Loans (Interest Income on Nonac

Loans (Interest Income on Nonaccrual Loans) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Interest income on nonaccrual loans	$ 236	$ 108
Commercial Real Estate
Interest income on nonaccrual loans	27	0
Commercial & Industrial
Interest income on nonaccrual loans	13	0
Total Commercial
Interest income on nonaccrual loans	40	0
Residential Real Estate
Interest income on nonaccrual loans	173	101
Home Equity
Interest income on nonaccrual loans	22	7
Other
Interest income on nonaccrual loans	1	0
Total Consumer
Interest income on nonaccrual loans	$ 23	$ 7

Loans (Collateral Dependent Ind

Loans (Collateral Dependent Individually Analyzed Loans) (Details) - USD ($) $ in Thousands		Mar. 31, 2023	Dec. 31, 2022
Loans and Leases Receivable Disclosure [Line Items]
Total loans	[1]	$ 5,227,969	$ 5,110,139
Collateral Dependent Individually Analyzed
Loans and Leases Receivable Disclosure [Line Items]
Total loans		8,222	8,455
Related allowance		532	0
Commercial Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans	[2]	1,909,136	1,829,304
Commercial Real Estate | Collateral Dependent Individually Analyzed
Loans and Leases Receivable Disclosure [Line Items]
Total loans	[3]	2,096	2,103
Related allowance	[3]	308	0
Commercial & Industrial
Loans and Leases Receivable Disclosure [Line Items]
Total loans	[4]	609,720	656,397
Commercial & Industrial | Collateral Dependent Individually Analyzed
Loans and Leases Receivable Disclosure [Line Items]
Total loans	[5]	920	0
Related allowance	[5]	224	0
Total Commercial
Loans and Leases Receivable Disclosure [Line Items]
Total loans		2,518,856	2,485,701
Total Commercial | Collateral Dependent Individually Analyzed
Loans and Leases Receivable Disclosure [Line Items]
Total loans		3,016	2,103
Related allowance		532	0
Residential Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans	[6]	2,403,255	2,323,002
Residential Real Estate | Collateral Dependent Individually Analyzed
Loans and Leases Receivable Disclosure [Line Items]
Total loans	[7]	4,614	5,760
Related allowance	[7]	0	0
Home Equity
Loans and Leases Receivable Disclosure [Line Items]
Total loans		288,878	285,715
Home Equity | Collateral Dependent Individually Analyzed
Loans and Leases Receivable Disclosure [Line Items]
Total loans	[7]	592	592
Related allowance	[7]	0	0
Other
Loans and Leases Receivable Disclosure [Line Items]
Total loans	[8]	16,980	15,721
Other | Collateral Dependent Individually Analyzed
Loans and Leases Receivable Disclosure [Line Items]
Total loans		0	0
Related allowance		0	0
Total Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans		305,858	301,436
Total Consumer | Collateral Dependent Individually Analyzed
Loans and Leases Receivable Disclosure [Line Items]
Total loans		592	592
Related allowance		$ 0	$ 0
[1]Includes net unamortized loan origination costs of $11.9 million and $11.6 million, respectively, at March 31, 2023 and December 31, 2022 and net unamortized premiums on loans purchased from and serviced by other financial institutions of $310 thousand and $318 thousand, respectively, at March 31, 2023 and December 31, 2022.[2]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]C&I consists of loans to businesses and individuals, a portion of which are fully or partially collateralized by real estate.[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		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year		$ 226,361		$ 1,616,371
Term loans amortized cost, prior year		1,536,710		1,189,746
Term loans amortized cost, two years ago		1,189,199		532,413
Term loans amortized cost, three years ago		525,439		407,075
Term loans amortized cost, four years ago		405,227		341,778
Term loans amortized cost, five years ago or more		995,689		675,484
Revolving loans amortized cost		336,338		335,300
Revolving loans converted to term loans		13,006		11,972
Total		5,227,969		5,110,139
Gross charge-offs, current year		53
Gross charge-offs, prior year		0
Gross charge-offs, two years ago		8
Gross charge-offs, three years ago		0
Gross charge-offs, four years ago		0
Gross charge-offs, five years ago or more		0
Gross charge-offs, revolving loans		0
Gross charge-offs, revolving loans converted to term loans		0
Total gross charge-offs		61	$ 36
Commercial Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year		94,852		612,175
Term loans amortized cost, prior year		556,396		405,386
Term loans amortized cost, two years ago		416,307		178,117
Term loans amortized cost, three years ago		180,270		194,529
Term loans amortized cost, four years ago		196,701		178,234
Term loans amortized cost, five years ago or more		454,423		253,037
Revolving loans amortized cost		9,033		6,389
Revolving loans converted to term loans		1,154		1,437
Total		1,909,136		1,829,304
Gross charge-offs, current year		0
Gross charge-offs, prior year		0
Gross charge-offs, two years ago		0
Gross charge-offs, three years ago		0
Gross charge-offs, four years ago		0
Gross charge-offs, five years ago or more		0
Gross charge-offs, revolving loans		0
Gross charge-offs, revolving loans converted to term loans		0
Total gross charge-offs		0	0
Commercial Real Estate | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year		74,365		591,596
Term loans amortized cost, prior year		556,396		383,062
Term loans amortized cost, two years ago		394,005		177,286
Term loans amortized cost, three years ago		179,602		170,259
Term loans amortized cost, four years ago		168,940		148,371
Term loans amortized cost, five years ago or more		413,854		242,061
Revolving loans amortized cost		8,931		6,243
Revolving loans converted to term loans		1,154		1,437
Total		1,797,247		1,720,315
Commercial Real Estate | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year		20,487		20,579
Term loans amortized cost, prior year		0		22,324
Term loans amortized cost, two years ago		22,302		328
Term loans amortized cost, three years ago		668		24,270
Term loans amortized cost, four years ago		27,761		28,676
Term loans amortized cost, five years ago or more		38,968		10,564
Revolving loans amortized cost		102		146
Revolving loans converted to term loans		0		0
Total		110,288		106,887
Commercial Real Estate | Classified [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year		0		0
Term loans amortized cost, prior year		0		0
Term loans amortized cost, two years ago		0		503
Term loans amortized cost, three years ago		0		0
Term loans amortized cost, four years ago		0		1,187
Term loans amortized cost, five years ago or more		1,601		412
Revolving loans amortized cost		0		0
Revolving loans converted to term loans		0		0
Total		1,601		2,102
Commercial & Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year		15,645		140,718
Term loans amortized cost, prior year		121,057		63,405
Term loans amortized cost, two years ago		59,380		71,265
Term loans amortized cost, three years ago		67,621		86,477
Term loans amortized cost, four years ago		83,688		86,438
Term loans amortized cost, five years ago or more		168,863		114,241
Revolving loans amortized cost		92,487		93,108
Revolving loans converted to term loans		979		745
Total		609,720		656,397
Gross charge-offs, current year	[1]	11
Gross charge-offs, prior year		0
Gross charge-offs, two years ago		0
Gross charge-offs, three years ago		0
Gross charge-offs, four years ago		0
Gross charge-offs, five years ago or more		0
Gross charge-offs, revolving loans		0
Gross charge-offs, revolving loans converted to term loans		0
Total gross charge-offs		11	5
Commercial & Industrial | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year		4,116		127,152
Term loans amortized cost, prior year		120,221		63,180
Term loans amortized cost, two years ago		59,156		71,265
Term loans amortized cost, three years ago		67,621		86,470
Term loans amortized cost, four years ago		82,807		85,011
Term loans amortized cost, five years ago or more		167,451		114,241
Revolving loans amortized cost		91,060		90,987
Revolving loans converted to term loans		979		745
Total		593,411		639,051
Commercial & Industrial | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year		11,529		13,566
Term loans amortized cost, prior year		836		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		185		1,427
Term loans amortized cost, five years ago or more		1,412		0
Revolving loans amortized cost		1,427		1,426
Revolving loans converted to term loans		0		0
Total		15,389		16,419
Commercial & Industrial | Classified [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year		0		0
Term loans amortized cost, prior year		0		225
Term loans amortized cost, two years ago		224		0
Term loans amortized cost, three years ago		0		7
Term loans amortized cost, four years ago		696		0
Term loans amortized cost, five years ago or more		0		0
Revolving loans amortized cost		0		695
Revolving loans converted to term loans		0		0
Total		920		927
Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year		108,758		838,566
Term loans amortized cost, prior year		836,112		708,360
Term loans amortized cost, two years ago		701,315		277,613
Term loans amortized cost, three years ago		272,536		123,364
Term loans amortized cost, four years ago		122,302		74,856
Term loans amortized cost, five years ago or more		362,232		300,243
Revolving loans amortized cost		0		0
Revolving loans converted to term loans		0		0
Total		2,403,255		2,323,002
Gross charge-offs, current year		0
Gross charge-offs, prior year		0
Gross charge-offs, two years ago		0
Gross charge-offs, three years ago		0
Gross charge-offs, four years ago		0
Gross charge-offs, five years ago or more		0
Gross charge-offs, revolving loans		0
Gross charge-offs, revolving loans converted to term loans		0
Total gross charge-offs		0	0
Residential Real Estate | Current [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year		108,758		838,566
Term loans amortized cost, prior year		836,112		707,760
Term loans amortized cost, two years ago		700,923		277,613
Term loans amortized cost, three years ago		272,006		123,098
Term loans amortized cost, four years ago		120,896		72,541
Term loans amortized cost, five years ago or more		358,830		294,549
Revolving loans amortized cost		0		0
Revolving loans converted to term loans		0		0
Total		2,397,525		2,314,127
Residential Real Estate | 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		600
Term loans amortized cost, two years ago		392		0
Term loans amortized cost, three years ago		530		266
Term loans amortized cost, four years ago		1,406		2,315
Term loans amortized cost, five years ago or more		3,402		5,694
Revolving loans amortized cost		0		0
Revolving loans converted to term loans		0		0
Total		5,730		8,875
Home Equity
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year		5,140		20,665
Term loans amortized cost, prior year		18,965		8,308
Term loans amortized cost, two years ago		7,993		3,742
Term loans amortized cost, three years ago		3,585		2,406
Term loans amortized cost, four years ago		2,319		2,015
Term loans amortized cost, five years ago or more		5,407		3,237
Revolving loans amortized cost		234,596		235,552
Revolving loans converted to term loans		10,873		9,790
Total		288,878		285,715
Gross charge-offs, current year		0
Gross charge-offs, prior year		0
Gross charge-offs, two years ago		0
Gross charge-offs, three years ago		0
Gross charge-offs, four years ago		0
Gross charge-offs, five years ago or more		0
Gross charge-offs, revolving loans		0
Gross charge-offs, revolving loans converted to term loans		0
Total gross charge-offs		0	0
Home Equity | Current [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year		5,140		20,665
Term loans amortized cost, prior year		18,965		8,308
Term loans amortized cost, two years ago		7,993		3,742
Term loans amortized cost, three years ago		3,585		2,406
Term loans amortized cost, four years ago		2,319		1,947
Term loans amortized cost, five years ago or more		5,344		3,139
Revolving loans amortized cost		234,279		235,004
Revolving loans converted to term loans		10,420		9,268
Total		288,045		284,479
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		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		68
Term loans amortized cost, five years ago or more		63		98
Revolving loans amortized cost		317		548
Revolving loans converted to term loans		453		522
Total		833		1,236
Other
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year		1,966		4,247
Term loans amortized cost, prior year		4,180		4,287
Term loans amortized cost, two years ago		4,204		1,676
Term loans amortized cost, three years ago		1,427		299
Term loans amortized cost, four years ago		217		235
Term loans amortized cost, five years ago or more		4,764		4,726
Revolving loans amortized cost		222		251
Revolving loans converted to term loans		0		0
Total		16,980		15,721
Gross charge-offs, current year	[1]	42
Gross charge-offs, prior year		0
Gross charge-offs, two years ago		8
Gross charge-offs, three years ago		0
Gross charge-offs, four years ago		0
Gross charge-offs, five years ago or more		0
Gross charge-offs, revolving loans		0
Gross charge-offs, revolving loans converted to term loans		0
Total gross charge-offs		50	$ 31
Other | Current [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year		1,951		4,231
Term loans amortized cost, prior year		4,180		4,287
Term loans amortized cost, two years ago		4,204		1,676
Term loans amortized cost, three years ago		1,427		299
Term loans amortized cost, four years ago		217		235
Term loans amortized cost, five years ago or more		4,764		4,726
Revolving loans amortized cost		222		251
Revolving loans converted to term loans		0		0
Total		16,965		15,705
Other | Past Due [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Term loans amortized cost, current year		15		16
Term loans amortized cost, prior year		0		0
Term loans amortized cost, two years ago		0		0
Term loans amortized cost, three years ago		0		0
Term loans amortized cost, four years ago		0		0
Term loans amortized cost, five years ago or more		0		0
Revolving loans amortized cost		0		0
Revolving loans converted to term loans		0		0
Total		$ 15		$ 16
[1]Gross charge-offs in 2023 represent charge-offs of business and consumer account overdraft balances.

Allowance for Credit Losses o_3

Allowance for Credit Losses on Loans (Allowance for Loan Losses Rollforward Analysis) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance, Beginning Balance	$ 38,027	$ 39,088
Charge-offs	(61)	(36)
Recoveries	14	184
Provision	800	0
Allowance, Ending Balance	38,780	39,236
Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance, Beginning Balance	18,435	18,933
Charge-offs	0	0
Recoveries	0	145
Provision	2,939	(618)
Allowance, Ending Balance	21,374	18,460
Commercial & Industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance, Beginning Balance	10,356	10,832
Charge-offs	(11)	(5)
Recoveries	5	6
Provision	(517)	389
Allowance, Ending Balance	9,833	11,222
Total Commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance, Beginning Balance	28,791	29,765
Charge-offs	(11)	(5)
Recoveries	5	151
Provision	2,422	(229)
Allowance, Ending Balance	31,207	29,682
Residential Real Estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance, Beginning Balance	7,740	7,860
Charge-offs	0	0
Recoveries	0	21
Provision	(1,501)	185
Allowance, Ending Balance	6,239	8,066
Home Equity
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance, Beginning Balance	1,115	1,069
Charge-offs	0	0
Recoveries	1	2
Provision	(138)	27
Allowance, Ending Balance	978	1,098
Other
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance, Beginning Balance	381	394
Charge-offs	(50)	(31)
Recoveries	8	10
Provision	17	17
Allowance, Ending Balance	356	390
Total Consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance, Beginning Balance	1,496	1,463
Charge-offs	(50)	(31)
Recoveries	9	12
Provision	(121)	44
Allowance, Ending Balance	$ 1,334	$ 1,488

Derivative Financial Instrume_3

Derivative Financial Instruments (Narrative) (Details) $ in Millions	Mar. 31, 2023 USD ($)
Statement of Financial Position [Abstract]
Loss on cash flow hedge included in AOCI(L) upon termination	$ 26.5
Loss on cash flow hedge included in AOCI(L) upon termination, net of tax	$ 20.1

Derivative Financial Instrume_4

Derivative Financial Instruments (Fair Value of Derivatives by Balance Sheet Location) (Details) - USD ($) $ in Thousands		Mar. 31, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Accrued interest receivable		$ 19,000	$ 17,600
Interest rate swaps [Member]
Derivatives, Fair Value [Line Items]
Notional amount		20,000	320,000
Interest rate swaps [Member] | Designated as Cash Flow Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Notional amount		20,000	320,000
Interest rate swaps [Member] | Designated as Cash Flow Hedging Instruments [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Interest rate cash flow hedge asset at fair value	[1]	405	548
Accrued interest receivable		25	24
Interest rate swaps [Member] | Designated as Cash Flow Hedging Instruments [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Interest rate cash flow hedge liability at fair value	[1]	0	31,178
Accrued interest payable			856
Interest rate contracts with customers [Member]
Derivatives, Fair Value [Line Items]
Notional amount		933,832	935,099
Interest rate contracts with customers [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional amount		933,832	935,099
Interest rate contracts with customers [Member] | Not Designated as Hedging Instrument [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets not designated		1,131	32
Interest rate contracts with customers [Member] | Not Designated as Hedging Instrument [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities not designated		53,185	68,137
Mirror interest rate contracts with counterparties [Member]
Derivatives, Fair Value [Line Items]
Notional amount		933,832	935,099
Mirror interest rate contracts with counterparties [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional amount		933,832	935,099
Mirror interest rate contracts with counterparties [Member] | Not Designated as Hedging Instrument [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets not designated		52,875	67,797
Mirror interest rate contracts with counterparties [Member] | Not Designated as Hedging Instrument [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities not designated		1,260	61
Risk participation agreements [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional amount		284,325	282,191
Risk participation agreements [Member] | Not Designated as Hedging Instrument [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets not designated		0	0
Risk participation agreements [Member] | Not Designated as Hedging Instrument [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities not designated		2	2
Interest rate lock commitments [Member]
Derivatives, Fair Value [Line Items]
Notional amount		26,489	12,201
Interest rate lock commitments [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional amount		26,489	12,201
Interest rate lock commitments [Member] | Not Designated as Hedging Instrument [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets not designated		404	144
Interest rate lock commitments [Member] | Not Designated as Hedging Instrument [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities not designated		0	4
Forward sale commitments [Member]
Derivatives, Fair Value [Line Items]
Notional amount		38,810	23,150
Forward sale commitments [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional amount		38,810	23,150
Forward sale commitments [Member] | Not Designated as Hedging Instrument [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets not designated		12	58
Forward sale commitments [Member] | Not Designated as Hedging Instrument [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities not designated		305	150
Derivative assets[Member]
Derivatives, Fair Value [Line Items]
Gross derivative asset positions		54,827	68,579
Less: derivative asset amounts offset	[2]	1,260	23,524
Derivative asset balances, net of offset		53,567	45,055
Less: collateral pledged	[3]	0	0
Net amounts		53,567	45,055
Derivative liabilities [Member]
Derivatives, Fair Value [Line Items]
Gross derivative liability positions		54,752	99,532
Less: derivative liability amounts offset	[2]	1,260	23,524
Derivative liability balances, net of offset		53,492	76,008
Less: collateral pledged	[3]	0	7,716
Net amounts		$ 53,492	$ 68,292
[1]The fair value of derivative assets includes accrued interest receivable of $25 thousand and $24 thousand, respectively, at March 31, 2023 and December 31, 2022. The fair value of derivative liabilities includes accrued interest payable $856 thousand at December 31, 2022.[2]Interest rate risk management contracts and loan related derivative contracts with counterparties are subject to master netting arrangements.[3]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, 2023	Mar. 31, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Net change in fair value of cash flow hedges, net of tax	$ 2,797	$ (10,335)
Interest rate swaps [Member] | Cash Flow Hedge [Member] | Other Comprehensive Income (Loss) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net change in fair value of cash flow hedges, net of tax	$ 2,797	$ (10,335)

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, 2023	Mar. 31, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Noninterest Income	$ 89	$ 2,358
Interest rate contracts with customers [Member] | Loan Related Derivative Income
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Noninterest Income	11,132	(40,822)
Mirror interest rate contracts with counterparties [Member] | Loan Related Derivative Income
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Noninterest Income	(11,171)	41,122
Risk participation agreements [Member] | Loan Related Derivative Income
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Noninterest Income	(11)	1
Interest rate lock commitments [Member] | Mortgage banking revenues [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Noninterest Income	263	(934)
Forward sale commitments [Member] | Mortgage banking revenues [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Noninterest Income	$ (124)	$ 2,991

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, 2023	Mar. 31, 2022	Dec. 31, 2022
Mortgage loans held for sale, measured at fair value	$ 7,445		$ 8,987
Mortgage loans held for sale, amortized cost	7,295		8,860
Mortgage loans held for sale, difference between fair value and amortized cost	150		$ 127
Mortgage Loans Held for Sale [Member]
Change in fair value under fair value option election	$ 24	$ (1,100)

Fair Value Measurements (Assets

Fair Value Measurements (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, fair value	$ 1,054,747	$ 993,928
Mortgage loans held for sale, measured at fair value	7,445	8,987
Obligations of U.S. government-sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, fair value	222,664	199,582
Mortgage-backed securities issued by U.S. government-sponsored agencies and U.S. government-sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, fair value	811,870	774,102
Individual name issuer trust preferred debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, fair value	8,700	8,760
Corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, fair value	11,513	11,484
Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale, measured at fair value	7,445	8,987
Derivative assets	53,567	45,055
Total assets at fair value on a recurring basis	1,115,759	1,047,970
Derivative liabilities	53,492	76,008
Total liabilities at fair value on a recurring basis	53,492	76,008
Recurring [Member] | Obligations of U.S. government-sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, fair value	222,664	199,582
Recurring [Member] | Mortgage-backed securities issued by U.S. government-sponsored agencies and U.S. government-sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, fair value	811,870	774,102
Recurring [Member] | Individual name issuer trust preferred debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, fair value	8,700	8,760
Recurring [Member] | Corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, fair value	11,513	11,484
Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale, measured at fair value	0	0
Derivative assets	0	0
Total assets at fair value on a recurring basis	0	0
Derivative liabilities	0	0
Total liabilities at fair value on a recurring basis	0	0
Recurring [Member] | Level 1 [Member] | Obligations of U.S. government-sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, fair value	0	0
Recurring [Member] | Level 1 [Member] | Mortgage-backed securities issued by U.S. government-sponsored agencies and U.S. government-sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, fair value	0	0
Recurring [Member] | Level 1 [Member] | Individual name issuer trust preferred debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, fair value	0	0
Recurring [Member] | Level 1 [Member] | Corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, fair value	0	0
Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale, measured at fair value	7,445	8,987
Derivative assets	53,567	45,055
Total assets at fair value on a recurring basis	1,115,759	1,047,970
Derivative liabilities	53,492	76,008
Total liabilities at fair value on a recurring basis	53,492	76,008
Recurring [Member] | Level 2 [Member] | Obligations of U.S. government-sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, fair value	222,664	199,582
Recurring [Member] | Level 2 [Member] | Mortgage-backed securities issued by U.S. government-sponsored agencies and U.S. government-sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, fair value	811,870	774,102
Recurring [Member] | Level 2 [Member] | Individual name issuer trust preferred debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, fair value	8,700	8,760
Recurring [Member] | Level 2 [Member] | Corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, fair value	11,513	11,484
Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale, measured at fair value	0	0
Derivative assets	0	0
Total assets at fair value on a recurring basis	0	0
Derivative liabilities	0	0
Total liabilities at fair value on a recurring basis	0	0
Recurring [Member] | Level 3 [Member] | Obligations of U.S. government-sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, fair value	0	0
Recurring [Member] | Level 3 [Member] | Mortgage-backed securities issued by U.S. government-sponsored agencies and U.S. government-sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, fair value	0	0
Recurring [Member] | Level 3 [Member] | Individual name issuer trust preferred debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, fair value	0	0
Recurring [Member] | Level 3 [Member] | Corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt securities, fair value	$ 0	$ 0

Fair Value Measurements (Asset

Fair Value Measurements (Asset and Liabilities Measured on a Nonrecurring Basis) (Details) - Nonrecurring [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2022	Mar. 31, 2023 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of collateral dependent individually analyzed loans written down to fair value	0
Total assets at fair value on a nonrecurring basis		$ 1,292
Collateral Dependent Individually Analyzed Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent individually analyzed loans		1,292
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent individually analyzed loans		0
Total assets at fair value on a nonrecurring basis		0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent individually analyzed loans		0
Total assets at fair value on a nonrecurring basis		0
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value on a nonrecurring basis		1,292
Level 3 [Member] | Collateral Dependent Individually Analyzed Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent individually analyzed loans		$ 1,292

Fair Value Measurements (Qualit

Fair Value Measurements (Qualitative Information About Level 3 Assets Measured at Fair Value on a Nonrecurring Basis) (Details) - Nonrecurring [Member] - Collateral Dependent Individually Analyzed Loans [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Collateral dependent individually analyzed loans	$ 1,292
Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Collateral dependent individually analyzed loans	$ 1,292
Minimum [Member] | Appraisals Of Collateral [Member] | Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Discount for costs to sell	0%
Appraisal adjustments	0%
Maximum [Member] | Appraisals Of Collateral [Member] | Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Discount for costs to sell	47%
Appraisal adjustments	100%
Weighted Average [Member] | Appraisals Of Collateral [Member] | Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Discount for costs to sell	43%
Appraisal adjustments	9%

Fair Value Measurements (Carryi

Fair Value Measurements (Carrying Amounts and Estimated Fair Values of Financial Instruments) (Details) - USD ($) $ in Thousands		Mar. 31, 2023	Dec. 31, 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans, net of allowance for credit losses on loans		$ 5,189,189	$ 5,072,112
Time deposits	[1]	1,531,835	1,122,882
Federal Home Loan Bank advances		925,000	980,000
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		5,189,189	5,072,112
Time deposits		1,531,835	1,122,882
Federal Home Loan Bank advances		925,000	980,000
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		5,044,231	4,929,449
Time deposits		1,558,899	1,137,219
Federal Home Loan Bank advances		925,350	978,590
Junior subordinated debentures		18,558	18,963
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		1,558,899	1,137,219
Federal Home Loan Bank advances		925,350	978,590
Junior subordinated debentures		18,558	18,963
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		5,044,231	4,929,449
Time deposits		0	0
Federal Home Loan Bank advances		0	0
Junior subordinated debentures		$ 0	$ 0
[1]Includes wholesale brokered time deposit balances of $607,329 and $327,044, respectively, as of March 31, 2023 and December 31, 2022.

Deposits (Narrative) (Details)

Deposits (Narrative) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Text Block [Abstract]
Time deposits greater than FDIC limit	$ 241.8	$ 200.9

Deposits (Summary of Deposits)

Deposits (Summary of Deposits) (Details) - USD ($) $ in Thousands		Mar. 31, 2023	Dec. 31, 2022
Deposits [Abstract]
Noninterest-bearing deposits		$ 829,763	$ 858,953
Interest-bearing demand deposits	[1]	319,598	333,197
NOW accounts		828,700	871,875
Money market accounts		1,214,014	1,255,805
Savings accounts		544,604	576,250
Time deposits	[2]	1,531,835	1,122,882
Interest-bearing deposits		4,438,751	4,160,009
Total deposits		5,268,514	5,018,962
Wholesale brokered demand deposits		1,233	31,153
Wholesale brokered time deposits		$ 607,329	$ 327,044
[1]Includes wholesale brokered demand deposit balances of $1,233 and $31,153, respectively, as of March 31, 2023 and December 31, 2022.[2]Includes wholesale brokered time deposit balances of $607,329 and $327,044, respectively, as of March 31, 2023 and December 31, 2022.

Deposits (Schedule of Time Depo

Deposits (Schedule of Time Deposits by Maturity) (Details) - USD ($) $ in Thousands		Mar. 31, 2023	Dec. 31, 2022
Maturities of Time Deposits [Abstract]
Time Deposit Maturities, Year One		$ 945,304
Time Deposit Maturities, Year Two		386,027
Time Deposit Maturities, Year Three		112,789
Time Deposit Maturities, Year Four		39,901
Time Deposit Maturities, Year Five		33,817
Time Deposit Maturities, after Year Five		13,997
Time deposits	[1]	$ 1,531,835	$ 1,122,882
Weighted Average Rate of Time Deposits [Abstract]
Time Deposits, Weighted Average Interest Rate, Maturities Year One		3.44%
Time Deposits, Weighted Average Interest Rate, Maturities Year Two		3.86%
Time Deposits, Weighted Average Interest Rate, Maturities Year Three		2.99%
Time Deposits, Weighted Average Interest Rate, Maturities Year Four		1.98%
Time Deposits, Weighted Average Interest Rate, Maturities Year Five		2.88%
Time Deposits, Weighted Average Interest Rate, Maturities Greater than Five Years		3.68%
Weighted Average Rate Domestic Deposit, Time Deposits		3.46%
[1]Includes wholesale brokered time deposit balances of $607,329 and $327,044, respectively, as of March 31, 2023 and December 31, 2022.

Borrowings (Narrative) (Details

Borrowings (Narrative) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Federal Home Loan Bank, Advances, Branch of FHLBB Bank [Line Items]
Federal Home Loan Bank advances	$ 925,000	$ 980,000
Federal Home Loan Bank of Boston [Member]
Federal Home Loan Bank, Advances, Branch of FHLBB Bank [Line Items]
Federal Home Loan Bank advances	925,000	980,000
Unused line of credit with FHLBB	40,000	40,000
Standby letter of credit with FHLB	215,000	215,000
Unused remaining available borrowing capacity with FHLBB	$ 859,600	$ 668,300

Borrowings (Federal Home Loan B

Borrowings (Federal Home Loan Bank Advances Maturity Schedule) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Advance from Federal Home Loan Bank, Fiscal Year Maturity [Abstract]
Federal Home Loan Bank advances	$ 925,000	$ 980,000
Federal Home Loan Bank of Boston [Member]
Advance from Federal Home Loan Bank, Fiscal Year Maturity [Abstract]
Scheduled maturity through the end of the current year	665,000
Scheduled maturity in year two	40,000
Scheduled maturity in year three	80,000
Scheduled maturity in year four	90,000
Scheduled maturity in year five	20,000
Scheduled maturity after year five	30,000
Federal Home Loan Bank advances	$ 925,000	$ 980,000
Federal Home Loan Bank, Advances, Weighted Average Interest Rate [Abstract]
Weighted average rate for scheduled maturity through the end of the current year	4.72%
Weighted average rate for scheduled maturity in year two	4.56%
Weighted average rate for scheduled maturity in year three	4.29%
Weighted average rate for scheduled maturity in year four	4.31%
Weighted average rate for scheduled maturity in year five	4.13%
Weighted average rate for scheduled maturity after year five	4.12%
Total weighted average rate	4.60%

Shareholders' Equity (Narrative

Shareholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Equity Additional Information [Table] [Line Items]
Cost of treasury share repurchases	$ 8,741
Trust preferred securities included in Tier 1 Capital	$ 22,000	$ 22,000
2023 Stock Repurchase Program
Equity Additional Information [Table] [Line Items]
Authorized amount (in shares)	850,000
Authorized amount (as a percentage of total common stock)	5%
Number of treasury shares repurchased	200,000
Average price of treasury share repurchases	$ 43.70
Cost of treasury share repurchases	$ 8,700

Shareholders' Equity (Regulator

Shareholders' Equity (Regulatory Captial Requirements) (Details) $ in Thousands		Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Corporation [Member]
Total Capital (to Risk-Weighted Assets):
Total Capital		$ 601,662	$ 605,005
Total Capital to Risk-Weighted Assets		0.1201	0.1237
Total Capital for Capital Adequacy Purposes		$ 400,831	$ 391,363
Total Capital for Capital Adequacy Purposes to Risk-Weighted Assets		0.0800	0.0800
Tier 1 Capital (to Risk-Weighted Assets):
Tier 1 Capital		$ 565,329	$ 571,794
Tier 1 Capital to Risk Weighted-Assets		0.1128	0.1169
Tier 1 Capital Required For Capital Adequacy Purposes		$ 300,623	$ 293,522
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		$ 543,333	$ 549,798
Common Equity Tier 1 Capital to Risk-Weighted Assets		0.1084	0.1124
Common Equity Tier 1 Capital Required for Capital Adequacy		$ 225,467	$ 220,142
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]	$ 565,329	$ 571,794
Tier 1 Leverage Capital to Average Assets	[1]	0.0825	0.0865
Tier 1 Leverage Capital Required for Capital Adequacy Purposes	[1]	$ 273,951	$ 264,295
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		$ 584,596	$ 588,090
Total Capital to Risk-Weighted Assets		0.1167	0.1202
Total Capital for Capital Adequacy Purposes		$ 400,723	$ 391,260
Total Capital for Capital Adequacy Purposes to Risk-Weighted Assets		0.0800	0.0800
Total Capital To Be Well Capitalized		$ 500,904	$ 489,074
Total Capital To Be Well Capitalized to Risk Weighted-Assets		0.1000	0.1000
Tier 1 Capital (to Risk-Weighted Assets):
Tier 1 Capital		$ 548,263	$ 554,879
Tier 1 Capital to Risk Weighted-Assets		0.1095	0.1135
Tier 1 Capital Required For Capital Adequacy Purposes		$ 300,542	$ 293,445
Tier 1 Capital Required for Capital Adequacy Purposes to Risk Weighted-Assets		0.0600	0.0600
Tier 1 Capital Required To Be Well Capitalized		$ 400,723	$ 391,260
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		$ 548,263	$ 554,879
Common Equity Tier 1 Capital to Risk-Weighted Assets		0.1095	0.1135
Common Equity Tier 1 Capital Required for Capital Adequacy		$ 225,407	$ 220,083
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		$ 325,587	$ 317,898
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]	$ 548,263	$ 554,879
Tier 1 Leverage Capital to Average Assets	[1]	0.0801	0.0840
Tier 1 Leverage Capital Required for Capital Adequacy Purposes	[1]	$ 273,868	$ 264,177
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]	$ 342,336	$ 330,222
Tier 1 Leverage Capital Required To Be Well Capitalized to Average Assets	[1]	0.0500	0.0500
[1]Leverage ratio.

Revenue from Contracts with C_3

Revenue from Contracts with Customers (Narrative) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Revenue from Contract with Customer [Abstract]
Receivables from contracts with customers	$ 6.6	$ 5.1
Contract cost assets	$ 2	$ 2.1

Revenue from Contracts with C_4

Revenue from Contracts with Customers (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Net interest income	[1]	$ 37,193	$ 35,091
Wealth management revenues	[1]	8,663	10,531
Mortgage banking revenues	[1]	1,245	3,501
Card interchange fees	[1]	1,132	1,164
Service charges on deposit accounts	[1]	777	668
Loan related derivative income	[1]	(51)	301
Income from bank-owned life insurance	[1]	1,165	601
Other income	[1]	352	393
Total noninterest income	[1]	13,283	17,159
Total revenues	[1]	50,476	52,250
Revenue from contracts with customers		10,848	12,649
Net Interest Income
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	[2]	0	0
Wealth Management Revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	[2]	8,663	10,531
Mortgage Banking Revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	[2]	0	0
Card Interchange Fees
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	[2]	1,132	1,164
Service Charges on Deposit Accounts
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	[2]	777	668
Loan Related Derivative Income
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	[2]	0	0
Income From Bank-owned Life Insurance
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	[2]	0	0
Other Income
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	[2]	276	286
Total Noninterest Income
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	[2]	10,848	12,649
Total Revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	[2]	$ 10,848	$ 12,649
[1]As reported in the Unaudited 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, 2023	Mar. 31, 2022
Revenue from contracts with customers		$ 10,848	$ 12,649
Wealth Management Revenues
Revenue from contracts with customers	[1]	8,663	10,531
Wealth Management Revenues | Transferred over Time [Member]
Revenue from contracts with customers		8,663	10,531
Card Interchange Fees
Revenue from contracts with customers	[1]	1,132	1,164
Card Interchange Fees | Transferred at Point in Time [Member]
Revenue from contracts with customers		1,132	1,164
Service Charges on Deposit Accounts
Revenue from contracts with customers	[1]	777	668
Service Charges on Deposit Accounts | Transferred at Point in Time [Member]
Revenue from contracts with customers		558	549
Service Charges on Deposit Accounts | Transferred over Time [Member]
Revenue from contracts with customers		219	119
Other Income
Revenue from contracts with customers	[1]	276	286
Other Income | Transferred at Point in Time [Member]
Revenue from contracts with customers		216	229
Other Income | Transferred over Time [Member]
Revenue from contracts with customers		$ 60	$ 57
[1]Revenue from contracts with customers in scope of ASC 606.

Defined Benefit Pension Plans_2

Defined Benefit Pension Plans (Components of Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Qualified Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	[1]	$ 351	$ 516
Interest cost	[2]	884	592
Expected return on plan assets	[2]	(1,147)	(1,159)
Recognized net actuarial loss	[2]	0	255
Net periodic benefit cost		88	204
Non-Qualified Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	[1]	39	54
Interest cost	[2]	176	106
Expected return on plan assets	[2]	0	0
Recognized net actuarial loss	[2]	59	173
Net periodic benefit cost		$ 274	$ 333
[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_3

Defined Benefit Pension Plans (Weighted-Average Assumptions Used) (Details)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
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	5.54%	3%
Equivalent single discount rate for service cost	5.60%	3.11%
Equivalent single discount rate for interest cost	5.43%	2.67%
Expected long-term return on plan assets	5.25%	5.25%
Rate of compensation increase	5%	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	5.50%	2.89%
Equivalent single discount rate for service cost	5.61%	3.16%
Equivalent single discount rate for interest cost	5.40%	2.48%
Rate of compensation increase	5%	3.75%

Business Segments (Statement of

Business Segments (Statement of Operations and Total Assets by Reportable Segment) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Net interest income (expense)	[1]	$ 37,193	$ 35,091
Provision for credit losses		800	100
Net interest income (expense) after provision for credit losses		36,393	34,991
Noninterest income	[1]	13,283	17,159
Depreciation and amortization expense		1,187	1,055
Other noninterest expenses		32,377	30,164
Total noninterest expenses		33,564	31,219
Income (loss) before income taxes		16,112	20,931
Income tax expense		3,300	4,448
Net income		12,812	16,483
Total assets		6,859,182	5,847,999	$ 6,660,051
Expenditures for long-lived assets		1,144	834
Commercial Banking [Member]
Segment Reporting Information [Line Items]
Net interest income (expense)		37,180	35,108
Provision for credit losses		800	100
Net interest income (expense) after provision for credit losses		36,380	35,008
Noninterest income		4,431	6,512
Depreciation and amortization expense		831	711
Other noninterest expenses		24,635	22,611
Total noninterest expenses		25,466	23,322
Income (loss) before income taxes		15,345	18,198
Income tax expense		3,087	3,797
Net income		12,258	14,401
Total assets		6,785,254	5,773,796
Expenditures for long-lived assets		1,136	730
Wealth Management Services [Member]
Segment Reporting Information [Line Items]
Net interest income (expense)		13	(17)
Provision for credit losses		0	0
Net interest income (expense) after provision for credit losses		13	(17)
Noninterest income		8,852	10,647
Depreciation and amortization expense		356	344
Other noninterest expenses		7,742	7,553
Total noninterest expenses		8,098	7,897
Income (loss) before income taxes		767	2,733
Income tax expense		213	651
Net income		554	2,082
Total assets		73,928	74,203
Expenditures for long-lived assets		$ 8	$ 104
[1]As reported in the Unaudited 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, 2023	Mar. 31, 2022
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Changes in fair value of available for sale debt securities, before tax		$ 17,365	$ (65,078)
Changes in fair value of available for sale debt securities, tax		(4,167)	15,618
Changes in fair value of available for sale debt securities, net of tax		13,198	(49,460)
Changes in fair value of cash flow hedges, before tax		1,046	(13,201)
Changes in fair value of cash flow hedges, tax		(251)	3,168
Change in fair value of cash flow hedges , net of tax		795	(10,033)
Net cash flow hedge (gains) losses reclassified into earnings, before tax	[1]	2,636	(399)
Net cash flow hedge (gains) losses reclassified into earnings, tax		(634)	97
Net cash flow hedge (gains) losses reclassified into earnings, net of tax		2,002	(302)
Net change in fair value of cash flow hedges, before tax		3,682	(13,600)
Net change in fair value of cash flow hedges, tax		(885)	3,265
Net change in fair value of cash flow hedges, net of tax		2,797	(10,335)
Amortization of net actuarial losses, before tax	[2]	59	428
Amortization of net actuarial losses, tax		(14)	(103)
Amortization of net actuarial losses, net of tax		45	325
Total other comprehensive income (loss), before tax		21,106	(78,250)
Total other comprehensive income (loss), tax		(5,066)	18,780
Total other comprehensive income (loss), net of tax		16,040	(59,470)
Federal Home Loan Bank of Boston [Member]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Net cash flow hedge (gains) losses reclassified into earnings, before tax		(127)	94
Interest Income
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Net cash flow hedge (gains) losses reclassified into earnings, before tax		$ 2,800	$ (493)
[1]For the three months ended March 31, 2023 and 2022, the pre-tax amounts reclassified into earnings in the Unaudited Consolidated Statements of Income include a reduction of $2.8 million and an increase of $493 thousand, respectively, in interest and fees on loans, as well as a reduction of $127 thousand and an increase of $94 thousand, respectively, in FHLB interest expense.[2]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, 2023	Mar. 31, 2022
Accumulated other comprehensive income (loss), beginning balance	$ (157,800)
Total other comprehensive income (loss), net of tax	16,040	$ (59,470)
Accumulated other comprehensive income (loss), ending balance	(141,760)
Net Unrealized Gains (Losses) on AFS Securities [Member]
Accumulated other comprehensive income (loss), beginning balance	(131,033)	(6,795)
Other comprehensive income (loss) before reclassifications	13,198	(49,460)
Amounts reclassed from accumulated other comprehensive income (loss)	0	0
Total other comprehensive income (loss), net of tax	13,198	(49,460)
Accumulated other comprehensive income (loss), ending balance	(117,835)	(56,255)
Net Unrealized Losses on Cash Flow Hedges [Member]
Accumulated other comprehensive income (loss), beginning balance	(22,645)	(4,013)
Other comprehensive income (loss) before reclassifications	795	(10,033)
Amounts reclassed from accumulated other comprehensive income (loss)	2,002	(302)
Total other comprehensive income (loss), net of tax	2,797	(10,335)
Accumulated other comprehensive income (loss), ending balance	(19,848)	(14,348)
Pension Benefit Adjustment [Member]
Accumulated other comprehensive income (loss), beginning balance	(4,122)	(9,173)
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassed from accumulated other comprehensive income (loss)	45	325
Total other comprehensive income (loss), net of tax	45	325
Accumulated other comprehensive income (loss), ending balance	(4,077)	(8,848)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated other comprehensive income (loss), beginning balance	(157,800)	(19,981)
Other comprehensive income (loss) before reclassifications	13,993	(59,493)
Amounts reclassed from accumulated other comprehensive income (loss)	2,047	23
Total other comprehensive income (loss), net of tax	16,040	(59,470)
Accumulated other comprehensive income (loss), ending balance	$ (141,760)	$ (79,451)

Earnings per Common Share (Calc

Earnings per Common Share (Calculation of Earnings per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share [Abstract]
Net income	$ 12,812	$ 16,483
Less dividends and undistributed earnings allocated to participating securities	(29)	(54)
Net income available to common shareholders	$ 12,783	$ 16,429
Weighted average common shares outstanding - basic	17,074,000	17,331,000
Dilutive effect of common stock equivalents	96,000	151,000
Weighted average common shares outstanding - diluted	17,170,000	17,482,000
Basic earnings per common share	$ 0.75	$ 0.95
Diluted earnings per common share	$ 0.74	$ 0.94
Antidilutive common stock equivalents	303,982	94,175

Commitments and Contingencies_2

Commitments and Contingencies (Financial Instruments with Off Balance Sheet Risk) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Interest rate lock commitments [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	$ 26,489	$ 12,201
Forward sale commitments [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	38,810	23,150
Interest rate contracts with customers [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	933,832	935,099
Mirror interest rate contracts with counterparties [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	933,832	935,099
Risk participation-in agreement [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	221,634	221,247
Interest rate swaps [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	20,000	320,000
Commitments to extend credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract amount	1,409,788	1,308,873
Standby Letters of Credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract amount	$ 9,696	$ 9,028

Commitments and Contingencies_3

Commitments and Contingencies (ACL on Unfunded Commitments Rollforward) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	$ 2,290	$ 2,161
Provision	0	100
Ending balance	2,290	2,261
Commercial Real Estate
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	1,236	1,267
Provision	132	68
Ending balance	1,368	1,335
Commercial & Industrial
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	988	816
Provision	(105)	21
Ending balance	883	837
Total Commercial
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	2,224	2,083
Provision	27	89
Ending balance	2,251	2,172
Residential Real Estate
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	50	62
Provision	(25)	10
Ending balance	25	72
Home Equity
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	0	0
Provision	0	0
Ending balance	0	0
Other
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	16	16
Provision	(2)	1
Ending balance	14	17
Total Consumer
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	16	16
Provision	(2)	1
Ending balance	$ 14	$ 17