Business Segments (Statement of Operations and Total Assets by Reportable Segment) (Details) - USD ($)
$ in Thousands

3 Months Ended

6 Months Ended

Jun. 30, 2025

Jun. 30, 2024

Jun. 30, 2025

Jun. 30, 2024

Dec. 31, 2024

Segment Reporting Information [Line Items]

Total interest income and dividend income

$ 78,846

$ 85,997

$ 158,309

$ 171,253

Total interest expense

41,661

54,412

84,702

108,003

Net interest income

^[1]

37,185

31,585

73,607

63,250

Provision for credit losses

600

500

1,800

1,200

Net interest income (expense) after provision for credit losses

36,585

31,085

71,807

62,050

Noninterest income

^[1]

17,078

16,660

39,721

33,823

Salaries and employee benefits

23,025

21,260

45,447

43,035

Outsourced services

4,404

4,096

8,750

7,876

Net occupancy

2,662

2,397

5,403

4,958

Equipment

930

958

1,821

1,978

Legal, audit and professional fees

726

741

1,476

1,447

FDIC deposit insurance costs

1,235

1,404

2,497

2,845

Advertising and promotion

717

661

1,127

1,209

Amortization of intangibles

203

208

407

416

Other Expenses

2,628

2,185

11,798

4,509

Total noninterest expenses

36,530

33,910

78,726

68,273

Income before income taxes

17,133

13,835

32,802

27,600

Income tax expense

3,888

3,020

7,378

5,849

Net income

13,245

10,815

25,424

21,751

Total assets at period end

6,745,167

7,184,360

6,745,167

7,184,360

$ 6,930,647

Expenditures for long-lived assets

401

1,620

489

2,246

Depreciation expense

876

^[2]

996

^[2]

1,770

1,998

Commercial Banking

Segment Reporting Information [Line Items]

Total interest income and dividend income

78,846

85,997

158,309

171,253

Total interest expense

41,661

54,412

84,702

108,003

Net interest income

37,185

31,585

73,607

63,250

Provision for credit losses

600

500

1,800

1,200

Net interest income (expense) after provision for credit losses

36,585

31,085

71,807

62,050

Noninterest income

6,720

6,651

19,355

12,223

Salaries and employee benefits

17,434

16,443

34,413

33,013

Outsourced services

3,374

3,115

6,639

5,963

Net occupancy

2,393

2,131

4,864

4,437

Equipment

855

877

1,670

1,778

Legal, audit and professional fees

525

633

1,052

1,223

FDIC deposit insurance costs

1,235

1,404

2,497

2,845

Advertising and promotion

601

564

949

1,030

Amortization of intangibles

Other Expenses

2,095

1,752

8,974

3,663

Total noninterest expenses

28,512

26,919

61,058

53,952

Income before income taxes

14,793

10,817

30,104

20,321

Income tax expense

3,283

2,342

6,630

4,248

Net income

11,510

8,475

23,474

16,073

Total assets at period end

6,683,840

7,125,943

6,683,840

7,125,943

Expenditures for long-lived assets

388

1,598

475

2,156

Depreciation expense

790

^[2]

893

^[2]

1,598

1,786

Wealth Management Services

Segment Reporting Information [Line Items]

Total interest income and dividend income

Total interest expense

Net interest income

Provision for credit losses

Net interest income (expense) after provision for credit losses

Noninterest income

10,358

10,009

20,366

21,600

Salaries and employee benefits

5,591

4,817

11,034

10,022

Outsourced services

1,030

981

2,111

1,913

Net occupancy

269

266

539

521

Equipment

151

200

Legal, audit and professional fees

201

108

424

224

FDIC deposit insurance costs

Advertising and promotion

116

178

179

Amortization of intangibles

203

208

407

416

Other Expenses

533

433

2,824

846

Total noninterest expenses

8,018

6,991

17,668

14,321

Income before income taxes

2,340

3,018

2,698

7,279

Income tax expense

605

678

748

1,601

Net income

1,735

2,340

1,950

5,678

Total assets at period end

61,327

58,417

61,327

58,417

Expenditures for long-lived assets

Depreciation expense

$ 86

^[2]

$ 103

^[2]

$ 172

$ 212

[1]	As reported in the Unaudited Consolidated Statements of Income.
[2]	Included in net occupancy and equipment expenses in the table above.

WASHINGTON TRUST BANCORP INC 10-Q