Discontinued Operation (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Gateway facility	Dec. 31, 2012 Gateway facility	Dec. 31, 2011 Gateway facility
Summarized results of operations for Gateway facility
Revenues	$ 129,000	$ 21,470,000	$ 24,465,000	$ 116,000	$ 129,000	$ 22,773,000	$ 23,719,000	$ 126,000				$ 2,000
Loss from discontinued operation before income taxes												(109,000)
Income tax benefit of discontinued operation												38,000
Loss from discontinued operation									(71,000)	0	0	(71,000)
Assets of the discontinued operation										0	0
Liabilities of the discontinued operation										$ 0	$ 0