Income Taxes, Current and Deferred Amounts of Income Tax Expense Table (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal	$ 33,020	$ 50,560	$ 20,246
State	16,193	15,327	12,593
Total current	49,213	65,887	32,839
Deferred:
Federal	(25,895)	14,094	34,941
State	(3,118)	(261)	12,006
Total deferred	(29,013)	13,833	46,947
Total income tax expense	$ 20,200	$ 79,720	$ 79,786