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Debt And Other Obligations (Term Loan) (Details) (USD $)
4 Months Ended 0 Months Ended
Apr. 21, 2012
Dec. 31, 2011
May 20, 2011
Term Loans [Member]
Apr. 21, 2012
Term Loans [Member]
Dec. 31, 2011
Term Loans [Member]
May 20, 2011
Term Loans [Member]
Base Rate Loans [Member]
Minimum [Member]
May 20, 2011
Term Loans [Member]
Base Rate Loans [Member]
Maximum [Member]
May 20, 2011
Term Loans [Member]
Eurodollar Loans [Member]
Minimum [Member]
May 20, 2011
Term Loans [Member]
Eurodollar Loans [Member]
Maximum [Member]
Debt Instrument [Line Items]                  
Basis spread on variable rate     0.50%     0.00% 1.375% 0.875% 2.375%
Term loan borrowed amount $ 150,000,000   $ 150,000,000            
Term loan maturity date     Aug. 01, 2013            
Annual amortization of principal balance for first year     10.00%            
Annual amortization of principal balance for second year     10.00%            
Annual amortization of principal balance for third year     15.00%            
Annual amortization of principal balance for fourth year     20.00%            
Annual amortization of principal balance for fifth year     45.00%            
Additional financing costs 3,766,000   100,000            
Unamortized financing costs     800,000            
Amounts outstanding under term loan $ 82,500,000 $ 90,000,000   $ 82,500,000 $ 90,000,000