Income Taxes - Schedule of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits, Beginning Balance	$ 1,425	$ 2,195	$ 943
Additions for tax positions taken in prior years	31	43	1,295
Reductions for lapse of applicable statutes	(1,086)	(813)	(43)
Unrecognized Tax Benefits, Ending Balance	370	1,425	2,195
Continuing Operations
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits, Beginning Balance	1,425	1,559	307
Additions for tax positions taken in prior years	31	43	1,295
Reductions for lapse of applicable statutes	(1,086)	(177)	(43)
Unrecognized Tax Benefits, Ending Balance	370	1,425	1,559
Discontinued Operations
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits, Beginning Balance	0	636	636
Additions for tax positions taken in prior years	0	0	0
Reductions for lapse of applicable statutes	0	(636)	0
Unrecognized Tax Benefits, Ending Balance	$ 0	$ 0	$ 636