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Summary of Significant Accounting Policies and New Accounting Standards (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Jun. 30, 2015
Mar. 31, 2015
 [1]
Dec. 31, 2014
 [2]
Sep. 30, 2014
 [2]
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2013
Accounting Policies [Abstract]                      
Net income $ 10,404 $ 16,696 $ 14,248 $ 18,932 $ (17,642) $ 6,370 $ 2,302 $ 5,843 $ 60,280 $ (3,127) $ 24,891
Weighted average number of shares - basic                 38,969 32,193 30,458
Dilutive effect of stock options and warrant                 846    
Weighted average number of shares - diluted                 39,815 32,193 30,458
Net income per share:                      
basic (in dollars per share) $ 0.27 $ 0.43 $ 0.37 $ 0.49         $ 1.55 $ (0.10) $ 0.82
diluted (in dollars per share) $ 0.26 $ 0.42 $ 0.36 $ 0.48         $ 1.51 $ (0.10) $ 0.82
[1] (Restated)
[2] (Revised)