Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Net Income	$ 55,039	$ 36,582	$ 106,892	$ 51,210
Unrealized gain from securities
Net unrealized holding gain from available for sale debt securities arising during the period, net of tax	21,850	42,860	(80,755)	122,556
Reclassification adjustment of net gain from sale of available for sale debt securities included in income, net of tax	(241)	0	(241)	(191)
Amortization of net unrealized gain for the reclassification of available for sale securities to held to maturity, after Tax	345	0	345	0
Net unrealized gain from securities, net of reclassification adjustment	21,264	42,860	(81,341)	122,365
Pension plan liability adjustment:
Amortization of unrecognized net actuarial loss included in net periodic pension cost, net of tax	115	79	230	159
Pension plan liability adjustment, net	115	79	230	159
Unrealized gain from cash flow hedging instruments
Net unrealized gain (loss) in cash flow hedging instruments arising during the period, net of tax	0	2,611	0	20,588
Reclassification adjustment for net gain in cash flow hedging instruments included in income, net of tax	1,998	1,680	3,975	2,402
Net unrealized gain from cash flow hedging instruments, net of reclassification adjustment	(1,998)	931	(3,975)	18,186
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent, Total	19,381	43,870	(85,086)	140,710
Total comprehensive income	$ 74,420	$ 80,452	$ 21,806	$ 191,920