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Summary of Significant Accounting Policies - Schedule of Reclassification out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Other comprehensive income/(loss) before taxes: |  |  |
Unrealized holding (losses)/gains on available-for-sale-securities, before tax | $ 41,442 | $ (18,958) | $ (24,241)
Other comprehensive income/(loss) before tax | 2,834 | (52,047) | (33,109)
Other Comprehensive Income (Loss), Tax [Abstract] |  |  |
Unrealized holding gains/(losses) on available-for-sale securities, provision (benefit) | 8,703 | (3,982) | (5,090)
Other comprehensive income/(loss), provision (benefit) | 596 | (10,930) | (6,953)
Other Comprehensive Income (Loss), Net of Tax [Abstract] |  |  |
Unrealized holding gains/(losses) on available-for-sale securities, after tax | 32,739 | (14,976) | (19,151)
Reclassification adjustments, after tax | (8,895) | (14,580) | (9,576)
Unrealized gains/(losses) on cash flow hedges | 11,133 | (26,537) | (16,580)
Other comprehensive income/(loss) net of tax | 2,238 | (41,117) | (26,156)
Cash Flow Hedges |  |  |
Other comprehensive income/(loss) before taxes: |  |  |
Unrealized gain/(losses) on cash flow hedges, before taxes | (27,350) | (14,635) | 3,254
Other comprehensive income/(loss) before tax | (21,780) | (15,801) | 2,938
Other Comprehensive Income (Loss), Tax [Abstract] |  |  |
Unrealized gains/(losses) on cash flow hedges, provision (benefit) | (5,744) | (3,074) | 683
Other comprehensive income/(loss), provision (benefit) | (4,574) | (3,319) | 617
Other Comprehensive Income (Loss), Net of Tax [Abstract] |  |  |
Reclassification adjustments, after tax | 4,400 | (921) | (250)
Unrealized gains/(losses) on cash flow hedges | (21,606) | (11,561) | 2,571
Other comprehensive income/(loss) net of tax | (17,206) | (12,482) | 2,321
Available-for-Sale Securities | Accumulated Net Investment Gain (Loss) Including Portion Attributable to Noncontrolling Interest |  |  |
Other comprehensive income/(loss) before taxes: |  |  |
Other comprehensive income/(loss) before tax | 37,291 | (22,831) | (29,980)
Other Comprehensive Income (Loss), Tax [Abstract] |  |  |
Other comprehensive income/(loss), provision (benefit) | 7,831 | (4,794) | (6,296)
Other Comprehensive Income (Loss), Net of Tax [Abstract] |  |  |
Reclassification adjustments, after tax | (3,279) | (3,061) | (4,533)
Unrealized gains/(losses) on cash flow hedges | 32,739 | (14,976) | (19,151)
Other comprehensive income/(loss) net of tax | 29,460 | (18,037) | (23,684)
Held-to-Maturity Securities | Accumulated Net Investment Gain (Loss) Including Portion Attributable to Noncontrolling Interest |  |  |
Other comprehensive income/(loss) before taxes: |  |  |
Other comprehensive income/(loss) before tax | (12,677) | (13,415) | (6,067)
Other Comprehensive Income (Loss), Tax [Abstract] |  |  |
Other comprehensive income/(loss), provision (benefit) | (2,661) | (2,817) | (1,274)
Other Comprehensive Income (Loss), Net of Tax [Abstract] |  |  |
Reclassification adjustments, after tax | (10,016) | (10,598) | (4,793)
Unrealized gains/(losses) on cash flow hedges | 0 | 0 | 0
Other comprehensive income/(loss) net of tax | (10,016) | (10,598) | (4,793)
Net Interest Income | Available-for-Sale Securities | Accumulated Net Investment Gain (Loss) Including Portion Attributable to Noncontrolling Interest | Reclassification adjustments |  |  |
Other comprehensive income/(loss) before taxes: |  |  |
Reclassification adjustments, before tax | (3,895) | (3,834) | (5,784)
Other Comprehensive Income (Loss), Tax [Abstract] |  |  |
Reclassification adjustments, provision (benefit) | (818) | (805) | (1,215)
Other Comprehensive Income (Loss), Net of Tax [Abstract] |  |  |
Reclassification adjustments, after tax | (3,077) | (3,029) | (4,569)
Net Interest Income | Held-to-Maturity Securities | Accumulated Net Investment Gain (Loss) Including Portion Attributable to Noncontrolling Interest | Reclassification adjustments |  |  |
Other comprehensive income/(loss) before taxes: |  |  |
Reclassification adjustments, before tax | (12,677) | (13,415) | (6,067)
Other Comprehensive Income (Loss), Tax [Abstract] |  |  |
Reclassification adjustments, provision (benefit) | (2,661) | (2,817) | (1,274)
Other Comprehensive Income (Loss), Net of Tax [Abstract] |  |  |
Reclassification adjustments, after tax | (10,016) | (10,598) | (4,793)
Other income | Available-for-Sale Securities | Accumulated Net Investment Gain (Loss) Including Portion Attributable to Noncontrolling Interest | Reclassification adjustments |  |  |
Other comprehensive income/(loss) before taxes: |  |  |
Reclassification adjustments, before tax | (256) | (275) | 45
Other Comprehensive Income (Loss), Tax [Abstract] |  |  |
Reclassification adjustments, provision (benefit) | (54) | (57) | 9
Other Comprehensive Income (Loss), Net of Tax [Abstract] |  |  |
Reclassification adjustments, after tax | (202) | (218) | 36
Net interest income | Cash Flow Hedges | Reclassification adjustments |  |  |
Other comprehensive income/(loss) before taxes: |  |  |
Reclassification adjustments, before tax | 5,570 | (1,166) | (316)
Other Comprehensive Income (Loss), Tax [Abstract] |  |  |
Reclassification adjustments, provision (benefit) | 1,170 | (245) | (66)
Other Comprehensive Income (Loss), Net of Tax [Abstract] |  |  |
Reclassification adjustments, after tax | 4,400 | (921) | (250)
Gain (Loss) on Investments | Available-for-Sale Securities | Accumulated Net Investment Gain (Loss) Including Portion Attributable to Noncontrolling Interest | Reclassification adjustments |  |  |
Other comprehensive income/(loss) before taxes: |  |  |
Reclassification adjustments, before tax | 0 | (236) | 0
Other Comprehensive Income (Loss), Tax [Abstract] |  |  |
Reclassification adjustments, provision (benefit) | 0 | (50) | 0
Other Comprehensive Income (Loss), Net of Tax [Abstract] |  |  |
Reclassification adjustments, after tax | $ 0 | $ 186 | $ 0

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