CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 116,728	$ 115,710
Unrealized gains and losses on available for sale securities
Net losses arising during the period	(38,892)	(10,436)
Less reclassification adjustment for net (gains) losses included in net income	(10)	44
Total	(38,902)	(10,392)
Unrealized gains and losses on derivatives (cash flow hedges)
Net gains on derivatives arising during the period	218	174
Less reclassification adjustment for net losses included in net income	386	651
Total	604	825
Defined benefit pension plan
Amortization of actuarial net loss	132	280
Other comprehensive (loss) income, net	(38,166)	(9,287)
Total comprehensive income	$ 78,562	$ 106,423