Selected Quarterly Financial Data (Unaudited) (Details Textual) (USD $)	3 Months Ended					12 Months Ended
	Sep. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Jun. 30, 2012	Mar. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Quarterly Financial Information Disclosure [Abstract]
Inventory Adjustments	$ 2,800,000
diluted earnings per share, inventory adjustment	$ 0.02
Vacant Property Value Adjustment		1,800,000
diluted earnings per share, vacant property adjustment		$ 0.01
Accrued lease cost adjustment		2,000,000
diluted earnings per share, accrued lease costs		$ 0.01
Selected quarterly financial data (Textual) [Abstract]
Diluted per share impact of business combination gain					$ 0.06
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain					5,700,000	0	5,719,000	0
Diluted per share impact of depreciation expense adjustment				$ 0.02
Gains (Losses) on Extinguishment of Debt						0	0	(2,764,000)
Depreciation expense adjustment				3,100,000			3,100,000
Diluted per share impact of non-cash, goodwill impairment charge			$ 0.90
Goodwill impairment			123,600,000				99,501,000	21,310,000
Asset Impairment Charges						$ 0