CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 20,471	$ 11,901
Other comprehensive income (loss), net of tax:
Net change in fair value of available for sale debt securities	(13,319)	12,806
Net change in fair value of cash flow hedges	297	(1,050)
Net change in defined benefit plan obligations	407	410
Total other comprehensive income (loss), net of tax	(12,615)	12,166
Total comprehensive income	$ 7,856	$ 24,067