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Additional Balance Sheet Information (Tables) | 9 Months Ended
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Sep. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Components of Balance Sheet Amounts | Certain balance sheet amounts are comprised of the following:
(Thousands of dollars) |  | September 30, 2014 |  |  | December 31, 2013 |
Accounts Receivable: |  |  |  |  |  |  |  |
Joint interest billing |  | $ | 3,322 |  |  | $ | 6,287 |
Trade receivables |  |  | 2,120 |  |  |  | 2,014 |
Oil and gas sales |  |  | 9,441 |  |  |  | 9,604 |
Other |  |  | 2,285 |  |  |  | 122 |
|  |  | 17,168 |  |  |  | 18,027 |
Less: Allowance for doubtful accounts |  |  | (543 | ) |  |  | (334 | )
Total |  | $ | 16,625 |  |  | $ | 17,693 |
Accounts Payable: |  |  |  |  |  |  |  |
Trade |  | $ | 3,534 |  |  | $ | 1,596 |
Royalty and other owners |  |  | 9,106 |  |  |  | 7,391 |
Partner advances |  |  | 3,160 |  |  |  | 3,378 |
Prepaid drilling deposits |  |  | 340 |  |  |  | 978 |
Other |  |  | 1,754 |  |  |  | 2,906 |
Total |  | $ | 17,894 |  |  | $ | 16,249 |
Accrued Liabilities: |  |  |  |  |  |  |  |
Compensation and related expenses |  | $ | 6,909 |  |  | $ | 3,062 |
Property costs |  |  | 7,725 |  |  |  | 3,119 |
Income tax |  |  | 322 |  |  |  | 268 |
Other |  |  | 422 |  |  |  | 383 |
Total |  | $ | 15,378 |  |  | $ | 6,832 |

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