Parent Company Income Statement (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Expenses
Interest expense		$ 13,717	$ 34,341	$ 53,879
Income tax benefit		35,683	31,669	52,933
Net Income		120,992	121,167	165,175
Parent Company [Member]
Income
Dividend Income, Operating	[1]	77,673	166,033	181,790
Total income		77,673	166,033	181,790
Expenses
Interest expense		4,493	5,432	8,236
Total expenses		4,493	5,432	8,236
Income before income taxes and equity in undistributed income of subsidiaries		73,180	160,601	173,554
Income tax benefit		(1,241)	(1,499)	(2,262)
Income of parent company		74,421	162,100	175,816
Equity (deficit) in undistributed income of subsidiaries		46,571	(40,933)	(10,641)
Net Income		$ 120,992	$ 121,167	$ 165,175

[1] Majority of balance eliminates in consolidation.