Operating Segments and Related Information - Results of Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2017	Jun. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting [Abstract]
Sales Revenue, Services, Net	$ 42,467	$ 35,137	$ 35,137	$ 114,546	$ 101,661
Revenue	0	5		0	(11)
Cost of sales	337	(128)		1,013	712
Selling, general and administrative expense	5	(4)		10	180
Depreciation and amortization	2	4		6	11
(Loss) income from discontinued operations before income taxes	(344)	133		(1,029)	(914)
Income tax expense	0	0		0	0
Net (loss) income from discontinued operations	$ (344)	$ 133		$ (1,029)	$ (914)