Accumulated Other Comprehensive Income - AOCI Reclass to IS (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Provision for Income Tax	$ (12,171)	$ (11,973)
Net Income	43,985	36,391
Other Noninterest Expense	15,651	14,024
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Net Income	(4,417)	(4,727)
Reclassification out of Accumulated Other Comprehensive Income | Amortization of Unrealized Gains(Losses) of Investment Securities Transferred from AFS to HTM
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Interest Income	(5,694)	(6,202)
Provision for Income Tax	1,509	1,644
Net Income	(4,185)	(4,558)
Reclassification out of Accumulated Other Comprehensive Income | Prior Service Credit
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Other Noninterest Expense	61	61
Reclassification out of Accumulated Other Comprehensive Income | Net Actuarial Losses
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Other Noninterest Expense	(378)	(291)
Reclassification out of Accumulated Other Comprehensive Income | Amortization of Defined Benefit Plans Items
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Provision for Income Tax	85	61
Net Income	(232)	(169)
Other Noninterest Expense	$ (317)	$ (230)