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ADDITIONAL BALANCE SHEET INFORMATION (Details) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013
--- | --- | ---
Accounts receivable, net |  |
Trade accounts | $ 190,328 | $ 215,361
Joint interest billing | 1,493 | 7,261
Income taxes receivable | 0 | 922
Other accounts | 439 | 746
Accounts receivable, gross | 192,260 | 224,290
Allowance for doubtful accounts | (990) | (1,814)
Accounts receivable, net | 191,270 | 222,476
Inventories |  |
Natural gas in storage | 3,596 | 9,056
Tubular goods and well equipment | 10,080 | 8,396
Other accounts | 55 | 16
Inventory, net | 13,731 | 17,468
Other current assets |  |
Prepaid balances and other | 2,730 | 2,587
Derivative instruments | 16,503 | 3,019
Other current assets | 19,233 | 5,606
Other assets |  |
Deferred compensation plan | 12,815 | 12,507
Debt issuance cost | 18,725 | 16,476
Other accounts | 70 | 79
Other assets | 31,610 | 29,062
Accounts payable |  |
Trade accounts | 53,938 | 26,023
Natural gas purchases | 6,813 | 2,052
Royalty and other owners | 102,933 | 79,150
Accrued capital costs | 185,525 | 146,899
Taxes other than income | 12,906 | 13,677
Drilling advances | 89 | 14,093
Other accounts | 17,583 | 6,907
Accounts payable current | 379,787 | 288,801
Accrued liabilities |  |
Employee benefits | 18,798 | 43,599
Taxes other than income | 10,459 | 6,894
Interest payable | 12,833 | 20,211
Derivative instruments | 102 | 13,912
Other accounts | 2,651 | 2,897
Accrued liabilities | 44,843 | 87,513
Other liabilities |  |
Deferred compensation plan | 30,277 | 33,211
Derivative instruments | 549 | 0
Other accounts | 6,963 | 13,043
Other liabilities | $ 37,789 | $ 46,254

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