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Condensed Consolidated Statement of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 33,649	$ 16,121
Other comprehensive income (loss), net of tax:
Unrealized losses on available for sale securities arising during the period	(8,690)	(20,822)
Change in minimum pension liability	0	912
Change in joint beneficiary agreements	(629)	0
Other comprehensive income (loss)	(9,319)	(19,910)
Comprehensive income (loss)	$ 24,330	$ (3,789)

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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