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Subsequent Event (Details) - USD ($)
$ in Thousands
Oct. 31, 2015
Sep. 30, 2015
Subsequent Event [Line Items]    
Maximum borrowing capacity   $ 250,000
Fixed Assets Included in Borrowing Base [Member]    
Subsequent Event [Line Items]    
Borrowing base $ 31,250  
Borrowing base percentage 12.50%  
Fixed Assets Not Included in Borrowing Base [Member]    
Subsequent Event [Line Items]    
Borrowing base $ 25,000  
Borrowing base percentage 10.00%  
Subsequent Event [Member]    
Subsequent Event [Line Items]    
Write off of deferred debt issuance cost $ 800  
Subsequent Event [Member] | LIBOR [Member] | Minimum [Member]    
Subsequent Event [Line Items]    
Variable interest rate 1.25%  
Subsequent Event [Member] | LIBOR [Member] | Maximum [Member]    
Subsequent Event [Line Items]    
Variable interest rate 1.75%  
Subsequent Event [Member] | Alternate Base Rate [Member] | Minimum [Member]    
Subsequent Event [Line Items]    
Variable interest rate 0.25%  
Subsequent Event [Member] | Alternate Base Rate [Member] | Maximum [Member]    
Subsequent Event [Line Items]    
Variable interest rate 0.75%  
Subsequent Event [Member] | Line of Credit [Member]    
Subsequent Event [Line Items]    
Maximum borrowing capacity $ 250,000  
Maturity date Oct. 28, 2020  
Debt issuance cost $ 800  
Subsequent Event [Member] | Line of Credit [Member] | Pay Cash dividend [Member]    
Subsequent Event [Line Items]    
Agreement permissions 20,000  
Subsequent Event [Member] | Line of Credit [Member] | Stock Repurchase [Member]    
Subsequent Event [Line Items]    
Agreement permissions 20,000  
Subsequent Event [Member] | Line of Credit [Member] | The Credit Agreement Also Permits Acquisitions, Permissible Debt, Cash Dividend Payments And Stock Repurchases [Member]    
Subsequent Event [Line Items]    
Agreement permissions 20,000  
Subsequent Event [Member] | Line of Credit [Member] | Minimum [Member] | Stock Repurchase [Member]    
Subsequent Event [Line Items]    
Borrowing base 25,000  
Subsequent Event [Member] | Accordion Feature [Member]    
Subsequent Event [Line Items]    
Maximum borrowing capacity $ 50,000