Summary of Significant Accounting Policies (Details) (USD $)		12 Months Ended
	Jan. 15, 2009	Dec. 31, 2012 Facilities Minimum	Dec. 31, 2012 Facilities Maximum	Dec. 31, 2012 Furniture, fixtures and equipment Minimum	Dec. 31, 2012 Furniture, fixtures and equipment Maximum
Derivative Instruments and Hedging Activities
Amount of interest rate swap agreement	$ 35,000,000
Property and equipment
Estimated useful lives		10 years	40 years	3 years	10 years