Selected Quarterly Financial Data (Unaudited) (Details Textual) (USD $)	3 Months Ended			12 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	Sep. 30, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
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		$ 5,719,000	$ 0	$ 0
Diluted per share impact of depreciation expense adjustment	$ 0.02
Gains (Losses) on Extinguishment of Debt				0	(2,764,000)	(2,131,000)
Depreciation expense adjustment	3,100,000			3,100,000
Diluted per share impact of non-cash, goodwill impairment charge				$ 0.90	$ 0.25
Goodwill impairment				99,501,000	21,310,000	0
Asset Impairment Charges				123,573,000
Cost incurred in conjunction with refinance of senior credit facility			(2,800,000)
Cost incurred in conjunction with refinance of senior credit facility per diluted share			$ 0.02
Tax expenses related to Settlement						$ 3,500,000