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Consolidated Statements of Change in Accumulated Other Comprehensive Income (Loss) - Schedule of Consolidated Statements of Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |  |  |  |  |  |
Beginning balance | $ 780,935 | $ 762,667 | $ 750,115 | $ 735,866 | $ 717,675 | $ 668,749 | $ 650,672 | $ 750,115 | $ 650,672
Cumulative-effect adjustment (ASU 2016-01) |  |  |  |  |  |  |  |  | (1,440)
Other comprehensive income (loss), net of tax | (709) | 9,685 | 11,048 | (1,661) | 2,309 | 5,071 | 4,519 | 20,024 | 11,899
Ending balance | 794,696 | 780,935 | 762,667 | 750,115 | 735,866 | 717,675 | 668,749 | 794,696 | 735,866
Unrealized Gains (Losses) on Cash Flow Hedges |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |  |  |  |  |  |
Beginning balance |  |  | (366) | (379) |  |  | 4,763 | (366) | 4,763
Other comprehensive income (loss), net of tax |  |  |  |  |  |  |  | 46 | (5,142)
Ending balance | (320) |  |  | (366) | (379) |  |  | (320) | (379)
Unrealized Gains (Losses) on Available-for-Sale Securities |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |  |  |  |  |  |
Beginning balance |  |  | (334) | 1,340 |  |  | (14,261) | (334) | (14,261)
Cumulative-effect adjustment (ASU 2016-01) |  |  |  |  |  |  |  |  | (1,440)
Other comprehensive income (loss), net of tax |  |  |  |  |  |  |  | 19,978 | 17,041
Ending balance | 19,644 |  |  | (334) | 1,340 |  |  | 19,644 | 1,340
Accumulated Other Comprehensive Income (Loss) |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |  |  |  |  |  |
Beginning balance | 20,033 | 10,348 | (700) | 961 | (1,348) | (6,419) | (9,498) | (700) | (9,498)
Cumulative-effect adjustment (ASU 2016-01) |  |  |  |  |  |  | (1,440) |  |
Other comprehensive income (loss), net of tax | (709) | 9,685 | 11,048 | (1,661) | 2,309 | 5,071 | 4,519 |  |
Ending balance | $ 19,324 | $ 20,033 | $ 10,348 | $ (700) | $ 961 | $ (1,348) | $ (6,419) | $ 19,324 | $ 961

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