CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - 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	$ 54,178	$ 38,089	$ 88,978	$ 72,830
Net unrealized (losses) gains on investment securities available for sale:
Change in net unrealized losses	(129)	(237)	(387)	(426)
Net unrealized losses reclassified into net income	79	211	103	435
Net unrealized (losses) gains on investment securities available for sale	(50)	(26)	(284)	9
Net change in pension-related amounts:
Amortization of loss	218	244	437	490
Net change in pension-related amounts	218	244	437	490
Other comprehensive income	168	218	153	499
Income tax effect on:
Change in net unrealized losses on investment securities	32	60	97	109
Net unrealized losses reclassified into net income on investment securities	(20)	(54)	(26)	(112)
Pension-related amounts	(55)	(63)	(110)	(126)
Income tax provision on other comprehensive income	(43)	(57)	(39)	(129)
Other comprehensive income, net of tax	125	161	114	370
Comprehensive income	$ 54,303	$ 38,250	$ 89,092	$ 73,200