Selected Quarterly Financial Data (Unaudited) (Details Textual) (USD $)	3 Months Ended		9 Months Ended	12 Months Ended
	Sep. 30, 2014	Mar. 31, 2013	Sep. 30, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Impairment charge	$ 27,000,000			$ 27,019,000	$ 0	$ 123,573,000
Impairment charge, per diluted share	$ 0.20
Debt expense related to new credit facility	1,700,000
Debt expense related to new credit facility, per diluted share	$ 0.01
Inventory adjustments			2,800,000		2,800,000
Inventory adjustment, per diluted share			$ 0.02
Vacant property value adjustment		1,800,000
Vacant property adjustment, per diluted share		$ 0.01
Accrued lease cost adjustment		$ 2,000,000
Accrued lease cost adjustment, per diluted share		$ 0.01