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Heritage Financial Corporation (Parent Company Only) - Condensed Statements of Income (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Condensed Income Statements, Captions [Line Items] |  |  |
Junior subordinated debentures | $ 742 | $ 890 | $ 1,339
Net interest income | 205,789 | 200,997 | 199,682
Other income | 5,759 | 7,474 | 7,358
Total noninterest income | 34,615 | 37,229 | 32,462
Professional services | 4,065 | 5,921 | 5,192
Other expense | 9,408 | 10,830 | 11,049
Total noninterest expense | 149,269 | 148,940 | 146,788
Income tax expense | 22,472 | 6,610 | 13,488
Net income | 98,035 | 46,570 | 67,557
Parent Company |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |
Interest on interest earning deposits | 30 | 16 | 57
Junior subordinated debentures | 742 | 890 | 1,339
Net interest income | (712) | (874) | (1,282)
Dividends from subsidiary bank | 46,000 | 39,000 | 47,000
Equity in undistributed income of subsidiary bank | 57,058 | 12,685 | 25,186
Other income | 117 | 5 | 39
Total noninterest income | 103,175 | 51,690 | 72,225
Professional services | 394 | 495 | 517
Other expense | 5,430 | 5,172 | 4,395
Total noninterest expense | 5,824 | 5,667 | 4,912
Income before income taxes | 96,639 | 45,149 | 66,031
Income tax expense | (1,396) | (1,421) | (1,526)
Net income | $ 98,035 | $ 46,570 | $ 67,557

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