CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Pension and other post retirement obligations:
Amortization of actuarial losses included in net periodic pension cost, gross	$ 911	$ 820
Tax effect	(219)	(197)
Amortization of actuarial losses included in net periodic pension cost, net	692	623
Amortization of prior service cost included in net periodic pension cost, gross	50	15
Tax effect	(12)	(3)
Amortization of prior service cost included in net periodic pension cost, net	38	12
Other comprehensive income related to pension and other post retirement obligations, net of taxes	730	635
Unrealized (losses) gains on available-for-sale securities:
Net unrealized holding (losses) gains arising during period, gross	(227,427)	122,428
Tax effect	54,663	(29,393)
Net unrealized holding (losses) gains arising during period, net	(172,764)	93,035
Other comprehensive (loss) income related to unrealized gains on available-for-sale securities, net of taxes	(172,764)	93,035
Other comprehensive (loss) income, net of tax	(172,034)	93,670
Net income	52,850	40,134
Comprehensive (loss) income	(119,184)	$ 133,804
Accumulated Other Comprehensive (Loss) Income By Component:
Unrealized (loss) for pension and other postretirement obligations	(37,306)		$ (38,267)
Tax effect	9,163		9,394
Net unrealized (loss) for pension and other postretirement obligations	(28,143)		(28,873)
Unrealized (loss) gain on available-for-sale securities	(107,313)		120,114
Tax effect	25,499		(29,164)
Net unrealized (loss) gain on available-for-sale securities	(81,814)		90,950
Accumulated other comprehensive (loss) income	$ (109,957)		$ 62,077