Income Taxes (Schedule of Income Tax Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Federal current	$ 29,102	$ 7,428	$ 38,535
State current	9,547	9,841	3,979
Foreign current	(88)	770	102
Current income tax expense (benefit), total	38,561	18,039	42,616
Federal deferred	15,094	37,284	(104,573)
State deferred	1,307	410	3,625
Deferred income tax expense (benefit), total	16,401	37,694	(100,948)
Total income tax expense (benefit)	$ 54,962	$ 55,733	$ (58,332)