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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Statement of Comprehensive Income [Abstract]        
Net income $ 29,007 $ 21,096 $ 58,591 $ 47,656
Available-for-sale investment securities:        
Gross unrealized holding (loss) gain arising during the period (1,422) (12,034) (11,309) 8,328
Related tax benefit (expense) 236 3,154 2,576 (1,493)
Reclassification adjustment for net loss included in net income 353 166 354 2,101
Related tax expense (82) (43) (82) (495)
Net effect on other comprehensive (loss) income (915) (8,757) (8,461) 8,441
Defined benefit plan:        
Amortization of unrecognized loss and service cost on benefit plans 0 7 0 9
Related tax benefit 0 (2) 0 (2)
Net effect on other comprehensive (loss) income 0 5 0 7
Cash flow hedges:        
Net (loss) gain arising during the period (443) 1,073 (187) (283)
Related tax benefit (expense) 105 (262) 45 51
Net effect on other comprehensive (loss) income (338) 811 (142) (232)
Total other comprehensive (loss) income, net of tax (1,253) (7,941) (8,603) 8,216
Total comprehensive income $ 27,754 $ 13,155 $ 49,988 $ 55,872