Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accounts Payable And Accrued Liabilities Current And Noncurrent [Abstract]
Accrued payroll and benefits	$ 13,634	$ 9,509
Accounts payable	8,382	6,351
Accrued interest	6,237	6,797
Accrued taxes	4,956	5,304
Other current liabilities	10,501	11,779
Total accounts payable and accrued liabilities	$ 43,710	$ 39,740