Quarterly report pursuant to Section 13 or 15(d)

Components of Selected Balance Sheet Accounts (Detail)

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Components of Selected Balance Sheet Accounts (Detail) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Bankruptcy Claims, amount reserved for outstanding claims $ 3,922 $ 3,922
Other current assets:    
Tubular inventory and well materials 1,931 2,125
Prepaid expenses 1,179 903
Other Assets, Current 3,110 3,028
Other assets:    
Deferred issuance costs of the Revolver 2,597 2,785
Other 2,579 2,544
Other assets 5,176 5,329
Accounts payable and accrued liabilities:    
Trade accounts payable 6,617 9,825
Drilling costs 4,741 2,479
Royalties and revenue – related 29,839 26,116
Compensation – related 1,345 2,557
Interest 57 55
Other 4,603 4,743
Accounts payable and accrued liabilities 51,124 49,697
Other liabilities:    
Asset retirement obligations 2,532 2,459
Defined benefit pension obligations 998 1,025
Postretirement health care benefit obligations 506 488
Other 100 100
Other liabilities $ 4,136 $ 4,072