Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Payables And Accruals [Abstract]
Insurance	$ 21,996	$ 18,114
Surety bond claim	20,900
Accumulated deficit in joint ventures	17,016	17,016
Payroll and employee benefits	5,258	10,028
Interest	3,918	8,660
Income and other taxes	2,117	3,208
Percentage of completion adjustment	1,546	3,322
Fuel hedge contracts	468
Other	7,562	8,695
Total accrued expenses	$ 80,781	$ 69,043