Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Accounts receivable, allowance for doubtful accounts	$ 6,054	$ 2,120
Long-term debt, original issue discount	7,862	31,093
Debt Issuance Costs, Net	$ 10,134	$ 10,197
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common Stock, Shares Authorized	100,000,000	100,000,000
Common stock, shares issued	37,144,000	36,467,000
Common stock, shares outstanding	37,144,000	36,467,000
First-Lien Credit Facility Maturing Twenty Twenty Three [Member] [Domain]
Deferred Gain	$ 18,911	$ 0
Long-term debt, original issue discount	1,228
Debt Issuance Costs, Net	$ 3,445