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Stock Repurchase Program (Details) - USD ($)
1 Months Ended 5 Months Ended 6 Months Ended
Jul. 27, 2016
Jun. 30, 2016
Jun. 30, 2016
Jan. 27, 2016
Equity, Class of Treasury Stock [Line Items]        
Aggregate value of share repurchases authorized       $ 100,000,000
Share repurchased (shares)   1,253,021    
Average price of shares repurchased (in dollars per share)   $ 11.73    
Total cost of shares repurchased   $ 14,700,000 $ 14,698,000  
Subsequent Event [Member]        
Equity, Class of Treasury Stock [Line Items]        
Share repurchased (shares) 254,700      
Average price of shares repurchased (in dollars per share) $ 11.71      
Total cost of shares repurchased $ 3,000,000