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Term Loan Facility and Line of Credit (Term Loan Facility) (Details) (USD $)
0 Months Ended 3 Months Ended 1 Months Ended 6 Months Ended
Oct. 26, 2012
Term Loan Facility [Member]
Jul. 27, 2012
Term Loan Facility [Member]
May 16, 2012
Term Loan Facility [Member]
May 04, 2013
Term Loan Facility [Member]
May 04, 2013
2013 Term Loan [Member]
May 04, 2013
2014 Term Loan [Member]
May 04, 2013
2014 And Thereafter [Member]
May 04, 2013
Federal Funds Effective Rate Plus [Member]
Term Loan Facility [Member]
May 04, 2013
Federal Funds Effective Rate Plus Margin [Member]
Term Loan Facility [Member]
May 04, 2013
LIBOR-Based Rate [Member]
Term Loan Facility [Member]
May 04, 2013
LIBOR Plus Margin [Member]
Term Loan Facility [Member]
May 04, 2013
Secured Debt [Member]
Term Loan Facility [Member]
May 31, 2013
Subsequent Event [Member]
Term Loan Facility [Member]
Aug. 03, 2013
Subsequent Event [Member]
Term Loan Facility [Member]
Debt Instrument [Line Items]                            
Borrowing under term loan facility       $ 100,000,000                    
Convertible preferred stock, dividends     99,500,000                      
Effective interest rate               0.50% 3.25% 1.00% 4.25%      
Interest rate (percent)       2.00%               5.25%    
Cash and cash equivalents       10,000,000                    
Consolidated leverage ratio, maximum         2.75                  
Consolidated leverage ratio, minimum         2.50                  
Leverage ratio on credit facility           2.00 1.75              
Term loan facility subject to repayment   50,000,000                        
Repayment of Term Loan Facility 300,000 65,300,000                        
Interest expense   700,000                   500,000    
Term loan facility outstanding amount                       34,500,000    
Repayments of debt                         15,000,000  
Deferred financing costs incurred in connection with Term Loan Facility     2,700,000                      
Write off of deferred financing costs   $ 1,600,000                       $ 300,000