Long-term Debt (Details 1) (USD $)	9 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2011	Mar. 18, 2011
Line of Credit Facility [Line Items]
Payments of Debt Issuance Costs		1,727,000
Interest Expense		25,500,000
Amortization of loan fees		2,351,000
Wells Fargo Capital Finance, LLC and certain other lenders [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			100,000,000
Payments of Debt Issuance Costs	1,700,000
Interest Expense	300,000
Amortization of loan fees	$ 400,000
LIBOR-based loans initial applicable margin		2.00%
Base Rate loans initial applicable margin		1.00%
LIBOR [Member] | Wells Fargo Capital Finance, LLC and certain other lenders [Member]
Line of Credit Facility [Line Items]
Interest rate percent above LIBOR	1.00%	1.00%
Federal Funds Rate [Member] | Wells Fargo Capital Finance, LLC and certain other lenders [Member]
Line of Credit Facility [Line Items]
Interest rate percent above LIBOR	0.05%	0.05%