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Accumulated Other Comprehensive Income (Loss) (Tables) | 6 Months Ended
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Jun. 30, 2022
Accumulated Other Comprehensive Income (Loss). |
Accumulated Other Comprehensive Income (Loss) | The following table represents changes in AOCI by component, net of tax, for the period below (dollars in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Three Months Ended June 30,
​ |  | 2022 | ​ | 2021
​ | ​ | ​ | Before Tax | ​ | ​ | Tax Effect | ​ | ​ | Net of Tax | ​ | ​ | Before Tax | ​ | ​ | Tax Effect | ​ | ​ | Net of Tax
Unrealized gains (losses) on debt securities available for sale | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at beginning of period | ​ | $ | (184,233) | ​ | $ | 52,515 | ​ | $ | (131,718) | ​ | $ | 7,547 | ​ | $ | (2,151) | ​ | $ | 5,396
Unrealized holding gains (losses) on debt securities available for sale, net | ​ | ​ | (95,288) | ​ | ​ | 27,162 | ​ | ​ | (68,126) | ​ | ​ | 9,469 | ​ | ​ | (2,700) | ​ | ​ | 6,769
Amounts reclassified from AOCI, net | ​ | ​ | 4 | ​ | ​ | (1) | ​ | ​ | 3 | ​ | ​ | (3) | ​ | ​ | 1 | ​ | ​ | (2)
Amortization of unrealized losses on securities transferred to held to maturity | ​ | ​ | 2,207 | ​ | ​ | (629) | ​ | ​ | 1,578 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
Balance at end of period | ​ | $ | (277,310) | ​ | $ | 79,047 | ​ | $ | (198,263) | ​ | $ | 17,013 | ​ | $ | (4,850) | ​ | $ | 12,163
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unrealized gains (losses) on cash flow hedges | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at beginning of period | ​ | $ | (8,234) | ​ | $ | 2,347 | ​ | $ | (5,887) | ​ | $ | (2,203) | ​ | $ | 628 | ​ | $ | (1,575)
Unrealized holding gains (losses) on cash flow hedges, net | ​ | ​ | (9,162) | ​ | ​ | 2,612 | ​ | ​ | (6,550) | ​ | ​ | (97) | ​ | ​ | 28 | ​ | ​ | (69)
Amounts reclassified from AOCI, net | ​ | ​ | (567) | ​ | ​ | 160 | ​ | ​ | (407) | ​ | ​ | 288 | ​ | ​ | (82) | ​ | ​ | 206
Balance at end of period | ​ | $ | (17,963) | ​ | $ | 5,119 | ​ | $ | (12,844) | ​ | $ | (2,012) | ​ | $ | 574 | ​ | $ | (1,438)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total AOCI | ​ | $ | (295,273) | ​ | $ | 84,166 | ​ | $ | (211,107) | ​ | $ | 15,001 | ​ | $ | (4,276) | ​ | $ | 10,725
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Six Months Ended June 30,
​ |  | 2022 | ​ | 2021
​ | ​ | ​ | Before Tax | ​ | ​ | Tax Effect | ​ | ​ | Net of Tax | ​ | ​ | Before Tax | ​ | ​ | Tax Effect | ​ | ​ | Net of Tax
Unrealized gains (losses) on debt securities available for sale | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at beginning of period | ​ | $ | (32,272) | ​ | $ | 9,199 | ​ | $ | (23,073) | ​ | $ | 49,644 | ​ | $ | (14,151) | ​ | $ | 35,493
Unrealized holding gains (losses) on debt securities available for sale, net | ​ | ​ | (199,570) | ​ | ​ | 56,888 | ​ | ​ | (142,682) | ​ | ​ | (32,603) | ​ | ​ | 9,293 | ​ | ​ | (23,310)
Unrealized losses on debt securities transferred to held to maturity from available for sale | ​ | ​ | (48,456) | ​ | ​ | 13,812 | ​ | ​ | (34,644) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
Amounts reclassified from AOCI, net | ​ | ​ | (102) | ​ | ​ | 29 | ​ | ​ | (73) | ​ | ​ | (28) | ​ | ​ | 8 | ​ | ​ | (20)
Amortization of unrealized losses on securities transferred to held to maturity | ​ | ​ | 3,090 | ​ | ​ | (881) | ​ | ​ | 2,209 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
Balance at end of period | ​ | $ | (277,310) | ​ | $ | 79,047 | ​ | $ | (198,263) | ​ | $ | 17,013 | ​ | $ | (4,850) | ​ | $ | 12,163
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unrealized gains (losses) on cash flow hedges | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at beginning of period | ​ | $ | (958) | ​ | $ | 273 | ​ | $ | (685) | ​ | $ | (3,055) | ​ | $ | 871 | ​ | $ | (2,184)
Unrealized holding gains (losses) on cash flow hedges, net | ​ | ​ | (15,938) | ​ | ​ | 4,543 | ​ | ​ | (11,395) | ​ | ​ | 477 | ​ | ​ | (136) | ​ | ​ | 341
Amounts reclassified from AOCI, net | ​ | ​ | (1,067) | ​ | ​ | 303 | ​ | ​ | (764) | ​ | ​ | 566 | ​ | ​ | (161) | ​ | ​ | 405
Balance at end of period | ​ | $ | (17,963) | ​ | $ | 5,119 | ​ | $ | (12,844) | ​ | $ | (2,012) | ​ | $ | 574 | ​ | $ | (1,438)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total AOCI | ​ | $ | (295,273) | ​ | $ | 84,166 | ​ | $ | (211,107) | ​ | $ | 15,001 | ​ | $ | (4,276) | ​ | $ | 10,725

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