Long-Term Debt, Summary of Long-term Debt, Net of Unamortized Deferred Loan Costs (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Debt, Long-term and Short-term, Combined Amount [Abstract]
Long-term debt, net of unamortized discount	$ 149,740	$ 212,629
Less: deferred loan costs	(721)	(2,286)
Total debt including debt held for sale as discontinued operations	149,019	210,343
Less: current portion	(144,064)	(46,046)
Long-term debt, excluding current portion	4,955	164,297
Cash Convertible Notes, Net of Unamortized Discount [Member]
Debt, Long-term and Short-term, Combined Amount [Abstract]
Long-term debt, net of unamortized discount	143,801	137,859
Capital Lease Obligations and Other [Member]
Debt, Long-term and Short-term, Combined Amount [Abstract]
Long-term debt, net of unamortized discount	939	1,270
Prior Credit Agreement [Member] | Term Loan [Member]
Debt, Long-term and Short-term, Combined Amount [Abstract]
Long-term debt, net of unamortized discount	0	60,000
Prior Credit Agreement [Member] | Revolver [Member]
Debt, Long-term and Short-term, Combined Amount [Abstract]
Long-term debt, net of unamortized discount	0	13,500
Credit Agreement [Member] | Term Loan [Member]
Debt, Long-term and Short-term, Combined Amount [Abstract]
Long-term debt, net of unamortized discount	$ 5,000	$ 0