Accrued Expenses - Schedule of Accrued Expenses (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Accrued Liabilities Current And Noncurrent [Abstract]
Employee compensation and related costs	$ 11,712	$ 11,664
Sales and use tax payable	3,192	5,316
Accrued job loss	86	644
Accrued interest	19,703	19,704
Workers' compensation, current	3,037	2,996
Accrued restructuring costs, current	2,280	4,507
Other, current	10,598	9,359
Total accrued expenses, current	50,608	54,190
Workers' compensation, non-current	5,996	5,359
Accrued restructuring & other costs, non-current	1,477	1,483
Total accrued expenses, non-current	$ 7,473	$ 6,842