Income Taxes, Current and Deferred Amounts of Income Tax Expense Table (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ 50,560	$ 20,246	$ 76,525
State	15,327	12,593	11,576
Total current	65,887	32,839	88,101
Deferred:
Federal	14,094	34,941	19,755
State	(261)	12,006	1,647
Total deferred	13,833	46,947	21,402
Total income tax expense	$ 79,720	$ 79,786	$ 109,503