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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Changes in accumulated other comprehensive income (loss) by component, net of tax        
Beginning balance $ 1,218,025 $ 1,265,822 $ 1,319,112 $ 1,270,069
Unrealized gains (losses) on debt securities available for sale:        
Unrealized holding gains (losses) on debt securities available for sale, Tax Effect (27,162) 2,700 (56,888) (9,293)
Unrealized holding gains (losses) on debt securities available for sale, Net of Tax (68,126) 6,769 (142,682) (23,310)
Unrealized losses on debt securities transferred to held to maturity from available for sale, Tax Effect     13,812  
Unrealized losses on debt securities transferred to held to maturity from available for sale, Net of Tax     (34,644)  
Amounts reclassified from AOCI, Tax Effect (1) 1 29 8
Amounts reclassified from AOCI, Net of Tax 3 (2) (73) (20)
Amortization of unrealized losses on securities transferred to held to maturity, Tax Effect 629   881  
Amortization of unrealized losses on securities transferred to held to maturity, Net of Tax (1,578)   (2,209)  
Unrealized gains (losses) on cash flow hedges:        
Unrealized holding gains (losses) on cash flow hedges, Tax Effect (2,612) (28) (4,543) 136
Unrealized holding gains (losses) on cash flow hedges, Net of Tax (6,550) (69) (11,395) 341
Amounts reclassified from AOCI, Tax Effect (160) 82 (303) 161
Amounts reclassified from AOCI, Net of Tax (407) 206 (764) 405
Ending balance 1,161,957 1,345,691 1,161,957 1,345,691
AOCI        
Changes in accumulated other comprehensive income (loss) by component, net of tax        
Beginning balance (137,605) 3,821 (23,758) 33,309
Unrealized gains (losses) on cash flow hedges:        
Accumulated other comprehensive income (loss) ending balance period, Before Tax (295,273) 15,001 (295,273) 15,001
Accumulated other comprehensive income (loss) ending balance period, Tax Effect 84,166 (4,276) 84,166 (4,276)
Ending balance (211,107) 10,725 (211,107) 10,725
Unrealized gains (losses) on debt securities available for sale        
Changes in accumulated other comprehensive income (loss) by component, net of tax        
Accumulated other comprehensive income (loss) beginning balance period, Before Tax (184,233) 7,547 (32,272) 49,644
Accumulated other comprehensive income (loss) beginning balance period, Tax Effect 52,515 (2,151) 9,199 (14,151)
Beginning balance (131,718) 5,396 (23,073) 35,493
Unrealized gains (losses) on debt securities available for sale:        
Unrealized holding gains (losses) on debt securities available for sale, Before Tax (95,288) 9,469 (199,570) (32,603)
Unrealized holding gains (losses) on debt securities available for sale, Tax Effect 27,162 (2,700) 56,888 9,293
Unrealized holding gains (losses) on debt securities available for sale, Net of Tax (68,126) 6,769 (142,682) (23,310)
Unrealized losses on debt securities transferred to held to maturity from available for sale, Before Tax     (48,456)  
Unrealized losses on debt securities transferred to held to maturity from available for sale, Tax Effect     13,812  
Unrealized losses on debt securities transferred to held to maturity from available for sale, Net of Tax     (34,644)  
Amounts reclassified from AOCI, Before Tax 4 (3) (102) (28)
Amounts reclassified from AOCI, Tax Effect (1) 1 29 8
Amounts reclassified from AOCI, Net of Tax 3 (2) (73) (20)
Amortization of unrealized losses on securities transferred to held to maturity, Before Tax 2,207   3,090  
Amortization of unrealized losses on securities transferred to held to maturity, Tax Effect (629)   (881)  
Amortization of unrealized losses on securities transferred to held to maturity, Net of Tax 1,578   2,209  
Unrealized gains (losses) on cash flow hedges:        
Accumulated other comprehensive income (loss) ending balance period, Before Tax (277,310) 17,013 (277,310) 17,013
Accumulated other comprehensive income (loss) ending balance period, Tax Effect 79,047 (4,850) 79,047 (4,850)
Ending balance (198,263) 12,163 (198,263) 12,163
Unrealized gains (losses) on cash flow hedges        
Changes in accumulated other comprehensive income (loss) by component, net of tax        
Accumulated other comprehensive income (loss) beginning balance period, Before Tax (8,234) (2,203) (958) (3,055)
Accumulated other comprehensive income (loss) beginning balance period, Tax Effect 2,347 628 273 871
Beginning balance (5,887) (1,575) (685) (2,184)
Unrealized gains (losses) on cash flow hedges:        
Unrealized holding gains (losses) on cash flow hedges, Before Tax (9,162) (97) (15,938) 477
Unrealized holding gains (losses) on cash flow hedges, Tax Effect 2,612 28 4,543 (136)
Unrealized holding gains (losses) on cash flow hedges, Net of Tax (6,550) (69) (11,395) 341
Amounts reclassified from AOCI, Before Tax (567) 288 (1,067) 566
Amounts reclassified from AOCI, Tax Effect 160 (82) 303 (161)
Amounts reclassified from AOCI, Net of Tax (407) 206 (764) 405
Accumulated other comprehensive income (loss) ending balance period, Before Tax (17,963) (2,012) (17,963) (2,012)
Accumulated other comprehensive income (loss) ending balance period, Tax Effect 5,119 574 5,119 574
Ending balance $ (12,844) $ (1,438) $ (12,844) $ (1,438)