v3.25.2
Shareholders' Equity - Changes in Balances of Component of Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance $ 2,021,227 $ 1,682,599 $ 1,962,327 $ 1,661,847
Other comprehensive income (loss) before reclassification     49,082 (16,361)
Amounts reclassified from accumulated other comprehensive income (loss)     4,088 144,527
Other comprehensive income (loss), net of tax amount 18,213 135,597 53,170 128,166
Balance 2,070,789 1,879,141 2,070,789 1,879,141
Securities Available for Sale and Transferred Securities [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance     (66,885) (204,670)
Other comprehensive income (loss) before reclassification     40,099 (736)
Amounts reclassified from accumulated other comprehensive income (loss)     0 137,094
Other comprehensive income (loss), net of tax amount     40,099 136,358
Balance (26,786) (68,312) (26,786) (68,312)
Defined Benefit Pension Items [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance     (4,721) (6,075)
Other comprehensive income (loss) before reclassification     0 0
Amounts reclassified from accumulated other comprehensive income (loss)     67 166
Other comprehensive income (loss), net of tax amount     67 166
Balance (4,654) (5,909) (4,654) (5,909)
Cash Flow Hedge Derivatives [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance     (12,053) (8,978)
Other comprehensive income (loss) before reclassification     8,983 (15,625)
Amounts reclassified from accumulated other comprehensive income (loss)     4,021 7,267
Other comprehensive income (loss), net of tax amount     13,004 (8,358)
Balance 951 (17,336) 951 (17,336)
Accumulated Other Comprehensive (Loss) [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance (48,702) (227,154) (83,659) (219,723)
Balance $ (30,489) $ (91,557) $ (30,489) $ (91,557)