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(3) Income Taxes (in thousands) (Details) - Deferred tax assets and liabilities (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets and liabilities [Abstract]
Stock-based compensation	$ 372	$ 582
Investment in Savoy	1,885	1,582
Oil and gas properties	913	1,778
Net long-term deferred tax assets	3,170	3,942
Coal properties	(46,474)	(39,805)
Net deferred tax liability	$ 43,304	$ 35,863

Amount after allocation of valuation allowances of noncurrent deferred tax asset attributable to deductible temporary differences and carryforwards. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer).

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