Certain Balance Sheet Components (Schedule of Accounts Payable and Accrued Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Accounts Payable And Accrued Liabilities Current [Abstract]
Accrued payroll and benefits	$ 13,700	$ 18,110
Accounts payable	14,173	9,361
Accrued interest	9,285	6,385
Accrued taxes	17,818	5,103
Avery Landing accrual (see Note 16: Commitments and Contingencies)	6,000	6,000
Other current liabilities	14,265	10,242
Total accounts payable and accrued liabilities	$ 75,241	$ 55,201