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Summary of Significant Accounting Policies - Schedule of Reclassification out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Other comprehensive (loss)/incomes: |  |
Other comprehensive (loss)/income before tax | $ (55,086) | $ 83,123
Other Comprehensive Income (Loss), Tax [Abstract] |  |
Other comprehensive income/(loss), Provision (Benefit) | (11,568) | 17,456
Other Comprehensive Income (Loss), Net of Tax [Abstract] |  |
Unrealized gains/(losses), After Tax | (45,086) | 66,773
Less reclassification adjustments, Provision (Benefit) | 1,568 | (1,106)
Other comprehensive (loss)/income net of tax | (43,518) | 65,667
Securities | Available-for-Sale Securities |  |
Other comprehensive (loss)/incomes: |  |
Unrealized gain/(losses), Before Tax | (86,263) | 67,356
Other comprehensive (loss)/income before tax | (86,267) | 66,364
Other Comprehensive Income (Loss), Tax [Abstract] |  |
Unrealized gains/(losses), Provision (Benefit) | (18,115) | 14,145
Other comprehensive income/(loss), Provision (Benefit) | (18,116) | 13,936
Other Comprehensive Income (Loss), Net of Tax [Abstract] |  |
Unrealized gains/(losses), After Tax | (68,148) | 53,211
Other comprehensive (loss)/income net of tax | (68,151) | 52,428
Securities | Held-to-Maturity Securities |  |
Other comprehensive (loss)/incomes: |  |
Less reclassification adjustments, Before Tax | (23) | (2,157)
Other comprehensive (loss)/income before tax | (23) | (2,157)
Other Comprehensive Income (Loss), Tax [Abstract] |  |
Less reclassification adjustments, Provision (Benefit) | (4) | (453)
Other comprehensive income/(loss), Provision (Benefit) | (4) | (453)
Other Comprehensive Income (Loss), Net of Tax [Abstract] |  |
Less reclassification adjustments, Provision (Benefit) | (19) | (1,704)
Other comprehensive (loss)/income net of tax | (19) | (1,704)
Securities | Net interest income | Available-for-Sale Securities |  |
Other comprehensive (loss)/incomes: |  |
Less reclassification adjustments, Before Tax | 0 | (984)
Other Comprehensive Income (Loss), Tax [Abstract] |  |
Less reclassification adjustments, Provision (Benefit) | 0 | (207)
Other Comprehensive Income (Loss), Net of Tax [Abstract] |  |
Less reclassification adjustments, Provision (Benefit) | 0 | (777)
Securities | Other income | Available-for-Sale Securities |  |
Other comprehensive (loss)/incomes: |  |
Less reclassification adjustments, Before Tax | (4) | (8)
Other Comprehensive Income (Loss), Tax [Abstract] |  |
Less reclassification adjustments, Provision (Benefit) | (1) | (2)
Other Comprehensive Income (Loss), Net of Tax [Abstract] |  |
Less reclassification adjustments, Provision (Benefit) | (3) | (6)
Cash flow hedges |  |
Other comprehensive (loss)/incomes: |  |
Unrealized gain/(losses), Before Tax | 29,193 | 17,170
Less reclassification adjustments, Before Tax | 2,011 | 1,746
Other comprehensive (loss)/income before tax | 31,204 | 18,916
Other Comprehensive Income (Loss), Tax [Abstract] |  |
Unrealized gains/(losses), Provision (Benefit) | 6,131 | 3,608
Less reclassification adjustments, Provision (Benefit) | 421 | 365
Other comprehensive income/(loss), Provision (Benefit) | 6,552 | 3,973
Other Comprehensive Income (Loss), Net of Tax [Abstract] |  |
Unrealized gains/(losses), After Tax | 23,062 | 13,562
Less reclassification adjustments, Provision (Benefit) | 1,590 | 1,381
Other comprehensive (loss)/income net of tax | 24,652 | 14,943
AOCI Attributable to Parent |  |
Other comprehensive (loss)/incomes: |  |
Other comprehensive (loss)/income before tax | (55,086) | 83,123
Other Comprehensive Income (Loss), Tax [Abstract] |  |
Other comprehensive income/(loss), Provision (Benefit) | (11,568) | 17,456
Other Comprehensive Income (Loss), Net of Tax [Abstract] |  |
Other comprehensive (loss)/income net of tax | $ (43,518) | $ 65,667

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