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Subsequent Events (Details) - USD ($)
Oct. 12, 2015
Oct. 19, 2015
Sep. 30, 2015
Apr. 27, 2015
Jan. 05, 2015
May. 12, 2014
Subsequent Event [Line Items]            
Authorized share amount for repurchase     $ 30,000,000 $ 30,000,000 $ 20,000,000 $ 10,000,000
Subsequent Event            
Subsequent Event [Line Items]            
Authorized share amount for repurchase   $ 50,000,000        
Subsequent Event | Credit Agreement | Revolving Credit Facility            
Subsequent Event [Line Items]            
Aggregate lender commitment $ 50,000,000          
Uncommitted incremental facility 35,000,000          
Fees paid for initiation of the credit facility $ 400,000          
Subsequent Event | Credit Agreement | Revolving Credit Facility | Minimum | London Interbank Offered Rate (LIBOR)            
Subsequent Event [Line Items]            
Basis spread on variable rate 1.50%          
Subsequent Event | Credit Agreement | Revolving Credit Facility | Maximum | London Interbank Offered Rate (LIBOR)            
Subsequent Event [Line Items]            
Basis spread on variable rate 2.25%