Accrued Expenses - Schedule of Accrued Expenses (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Accrued Liabilities Current And Noncurrent [Abstract]
Employee compensation and related costs	$ 22,204	$ 27,125
Sales and use tax payable	5,187	8,782
Accrued job loss	838	1,375
Accrued interest	9,871	19,723
Guarantee of indebtedness		4,000
Workers' compensation, current	3,149	4,259
Accrued restructuring costs, current	4,263	1,714
Other, current	5,835	6,596
Total accrued expenses, current	51,347	73,574
Contingent consideration, non-current		726
Workers' compensation, non-current	6,188	7,071
Accrued restructuring & other costs, non-current	1,690	687
Total accrued expenses, non-current	$ 7,878	$ 8,484