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Additional Balance Sheet Information - Schedule of Additional Balance Sheet Information (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Accounts receivable, net |  |
Trade accounts | $ 162,069 | $ 185,594
Joint interest accounts | 1,208 | 1,359
Other accounts | 425 | 5,335
Accounts receivable, net | 163,702 | 192,288
Allowance for doubtful accounts | (2,012) | (1,243)
Accounts receivable, net | 161,690 | 191,045
Inventories |  |
Tubular goods and well equipment | 12,130 | 11,005
Natural gas in storage | 867 | 2,299
Inventories | 12,997 | 13,304
Other current assets |  |
Prepaid balances and other | 3,587 | 2,692
Derivative instruments | 2,536 | 0
Other current assets | 6,123 | 2,692
Other assets |  |
Deferred compensation plan | 14,336 | 12,587
Debt issuance costs | 8,845 | 11,403
Derivative instruments | 3,763 | 2,991
Other accounts | 101 | 58
Other assets | 27,045 | 27,039
Accounts payable |  |
Trade accounts | 25,851 | 27,355
Natural gas purchases | 3,457 | 2,231
Royalty and other owners | 33,135 | 36,472
Accrued transportation | 48,104 | 48,977
Accrued capital costs | 33,440 | 34,647
Taxes other than income | 12,938 | 13,827
Other accounts | 3,864 | 4,902
Accounts payable | 160,789 | 168,411
Accrued liabilities |  |
Employee benefits | 17,065 | 14,153
Taxes other than income | 4,018 | 3,829
Asset retirement obligations | 6,073 | 2,000
Other accounts | 158 | 1,510
Accrued liabilities | 27,314 | 21,492
Other liabilities |  |
Deferred compensation plan | 27,598 | 24,169
Other accounts | 8,810 | 4,952
Other liabilities | $ 36,408 | $ 29,121

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- Definition The total amount due to the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables, net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(4)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-06(3)) -URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e604059-122996 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(5)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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