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Debt (Amended, Restated And Consolidated Credit Facility) (Details) (USD $)
Mar. 31, 2013
Line of Credit Facility [Line Items]  
Term loan amount $ 75,000,000
Basis spread on borrowings variable rate 250.00%
Weighted-average interest rate 2.80%
Additional borrowing capacity under accordion feature 500,000,000
Revolving credit facility, amount outstanding 90,200,000
Remaining borrowing capacity 73,400,000
Revolving Credit Facility [Member]
 
Line of Credit Facility [Line Items]  
Credit facility borrowing capacity 225,000,000
Term Loan [Member]
 
Line of Credit Facility [Line Items]  
Credit facility borrowing capacity 75,000,000
Minimum [Member]
 
Line of Credit Facility [Line Items]  
Basis spread on borrowings variable rate 200.00%
Maximum [Member]
 
Line of Credit Facility [Line Items]  
Basis spread on borrowings variable rate 300.00%
New [Member]
 
Line of Credit Facility [Line Items]  
Credit facility borrowing capacity $ 300,000,000