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Term Loan And Revolving Credit Facility (Details) (USD $)
0 Months Ended 6 Months Ended
Jul. 18, 2011
Jun. 30, 2011
Apr. 04, 2011
Jan. 03, 2011
Line of credit facility, amount outstanding   $ 15,000,000    
Term loan facility, amount outstanding   100,000,000    
Payments on revolving credit facility 15,000,000 80,000,000    
Maturity date   March 31, 2014    
Term loan facility, maturity date   March 31, 2014    
Maximum borrowing on credit facility     100,000,000 100,000,000
Maximum borrowing on term loan facility     100,000,000  
Interest rate swap, fixed rate     3.60%  
Interest rate swap term, years   3    
Minimum [Member]
       
Margin range for interest if using base rate   2.25%    
Unused commitment fee   0.30%    
Maximum [Member]
       
Margin range for interest if using base rate   2.75%    
Unused commitment fee   0.40%    
Letter of Credit [Member]
       
Maximum borrowing on credit facility     50,000,000  
Due on December 31, 2011 [Member]
       
Repayment of loan   2,500,000    
Due on March 31, 2012 [Member]
       
Repayment of loan   5,000,000    
Due on June 30, 2012 [Member]
       
Repayment of loan   $ 7,500,000