Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net income	$ 250,178	$ 202,820	$ 154,244
Unrealized gain (loss) from securities:
Net unrealized holding gain (loss) from available for sale debt securities arising during the period, net of tax	(536,262)	(137,482)	130,355
Reclassification adjustment of net gain from available for sale debt securities arising during the period, net of tax	7	(242)	(219)
OCI, Debt Securities, Available-for-Sale, Transfer to Held-to-Maturity, Adjustment from AOCI for Amortization of Gain (Loss), after Tax	(6,074)	(2,316)	0
Net unrealized gain (loss) from available for sale debt securities, net of reclassification adjustment	(542,329)	(140,040)	130,136
Pension plan liability adjustment:
Unrecognized net actuarial gain (loss) and plan amendments during the period, net of tax	4,533	562	(2,177)
Amortization of unrecognized net actuarial losses included in net periodic pension cost, net of tax	(402)	(459)	(318)
Pension plan liability adjustment, net	(4,935)	(1,021)	1,859
Unrealized gain from cash flow hedging instruments:
Net unrealized gain in cash flow hedging instruments arising during the period, net of tax	0	0	20,012
Reclassification adjustment for net gain in cash flow hedging instruments included in income, net of tax	(8,263)	(8,014)	(6,461)
Net unrealized gain form cash flow hedging instruments, net of reclassification adjustment	(8,263)	(8,014)	13,551
Other comprehensive income (loss)	(545,657)	(147,033)	141,828
Total comprehensive income (loss)	$ (295,479)	$ 55,787	$ 296,072