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Subsequent Event - Net Income per Share and Weighted Average Shares (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2014
Mar. 31, 2013
Subsequent Events [Abstract]        
Net income $ 6,370 $ 4,180 $ 14,515 $ 18,912
Weighted average number of shares - basic 30,458 [1] 30,458 [1] 30,458 [1] 30,458 [1]
Dilutive effect of stock options 158   53  
Dilutive effect of BFI warrant 41   14  
Weighted average number of shares - diluted 30,657 [1] 30,458 [1] 30,525 [1] 30,458 [1]
Net income per share:        
basic $ 0.21 $ 0.14 $ 0.48 $ 0.62
diluted $ 0.21 $ 0.14 $ 0.48 $ 0.62
[1] after 0.442-for-1 split