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Basis of Presentation (Details)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Dec. 31, 2015
USD ($)
$ / shares
shares
Dec. 31, 2014
USD ($)
$ / shares
shares
Dec. 31, 2015
USD ($)
item
$ / shares
shares
Dec. 31, 2014
USD ($)
$ / shares
shares
Description of Business        
Number of operating segments | item     3  
Computation of basic and diluted earnings per share        
Net income for diluted earnings per share calculation | $ $ 108 $ 18,241 $ 10,913 $ 29,490
Weighted average shares outstanding-for basic earnings per share calculation 19,740 19,811 19,737 19,815
Dilutive effect of stock awards (in shares) 646 676 690 691
Weighted average shares outstanding-for diluted earnings per share calculation 20,386 20,487 20,427 20,506
Basic net income per share (in dollars per share) | $ / shares $ 0.01 $ 0.92 $ 0.55 $ 1.49
Diluted net income per share (in dollars per share) | $ / shares $ 0.01 $ 0.89 $ 0.53 $ 1.44