Accrued Expenses and other current liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accrued Liabilities, Current [Abstract]
Accrued interest	$ 20,564	$ 25,030
Accrued bonus	14,788	10,444
Accrued insurance	52,280	53,745
Accrued property and other taxes	17,379	16,656
Construction retainage	226	1,463
Other	25,859	28,145
Total	$ 131,096	$ 135,483