Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Other Liabilities Disclosure [Abstract]
Payroll and related employee benefits	$ 56,860	$ 36,888
Accrued insurance	41,154	44,585
Performance guarantees	65,514	75,820
Other	37,407	43,359
Total	$ 200,935	$ 200,652