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Equity Investment in Savoy (Condensed Balance Sheet - Savoy) (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Current assets | $ 66,615 | $ 84,409
Other | 16,528 | 18,849
Total assets | 545,490 | 579,585
Total liabilities | 338,670 | 389,710
Total liabilities and stockholders' equity | 545,490 | 579,585
Savoy [Member] |  |
Current assets | 11,795 | 14,863
Oil and gas properties, net | 21,659 | 27,549
Other | 1,015 | 852
Total assets | 34,469 | 43,264
Total liabilities | 4,909 | 10,079
Partners' capital | 29,560 | 33,185
Total liabilities and stockholders' equity | $ 34,469 | $ 43,264

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