Income Taxes (Income Tax Provision (Benefit)) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current taxes:
Federal		$ 0	$ 9	$ 820
Foreign		0	48	0
State		1,043	590	151
Deferred taxes:
Federal		15,642	27,625	11,338
Foreign		(63)	0	0
State		2,973	3,396	1,085
Total deferred tax expense		18,552	(28,923)	12,423
Total income tax expense from continuing operations		19,595	(28,276)	13,394
Income tax expense (benefit) from discontinued operations		434	(1,848)	1,384
2017 Tax Cuts and Jobs Act [Member]
Deferred taxes:
Federal	$ 59,900	$ 0	$ (59,944)	$ 0