Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net Income	$ 53,017	$ 44,734	$ 159,909	$ 95,944
Unrealized gain from securities
Net unrealized holding gain (loss) from available for sale debt securities arising during the period, net of tax	(22,022)	(1,442)	(102,777)	121,114
Reclassification adjustment of net gain from sale of available for sale debt securities included in income, net of tax			(241)	(191)
Amortization of net unrealized gain for the reclassification of available for sale securities to held to maturity, after Tax	465	0	810	0
Net unrealized gain (loss) from securities, net of reclassification adjustment	(22,487)	(1,442)	(103,828)	120,923
Pension plan liability adjustment:
Amortization of unrecognized net actuarial loss included in net periodic pension cost, net of tax	114	80	344	239
Pension plan liability adjustment, net	114	80	344	239
Unrealized gain from cash flow hedging instruments
Net unrealized gain (loss) in cash flow hedging instruments arising during the period, net of tax	0	(62)	0	20,526
Reclassification adjustment for net gain in cash flow hedging instruments included in income, net of tax	2,019	2,052	5,994	4,454
Net unrealized gain (loss) from cash flow hedging instruments, net of reclassification adjustment	(2,019)	(2,114)	(5,994)	16,072
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent, Total	(24,392)	(3,476)	(109,478)	137,234
Total comprehensive income	$ 28,625	$ 41,258	$ 50,431	$ 233,178