Accounts Receivable, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	$ 286,329	$ 205,644
Allowance for Doubtful Accounts Receivable, Current	(946)	(1,309)
Accounts Receivable, Net, Current	285,383	204,335
Trade Accounts Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	166,516	137,065
Joint Interest Accounts Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	75,175	40,322
Other Accounts Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	$ 44,638	$ 28,257