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Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-In Capital
Retained Earnings
Treasury Stock
Accumulated Other Comprehensive Income (Loss)
Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Beginning equity balances, as adjusted $ 315,566 $ 279 $ 127,058 $ 223,157 $ (26,907) $ (6,845) $ (1,176)
Retrospective adjustment upon adoption of ASU 2016-09 0   100 (100)      
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Jun. 30, 2016 315,566 279 126,958 223,257 (26,907) (6,845) (1,176)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Noncontrolling Interest, Increase from Subsidiary Equity Issuance 855           855
Net income (loss) 1,092     771     321
Other comprehensive income (loss) (962)         (962)  
Treasury shares sold to Employee Stock Purchase Plan 253   18   235    
Exercise of stock options 234   (290)   524    
Issuance of deferred shares 0   (5,740)   5,740    
Other treasury share purchases (2,288)       (2,288)    
Stock-based compensation expense 5,467   5,467        
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Mar. 31, 2017 320,217 279 126,513 223,928 (22,696) (7,807) 0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Jun. 30, 2017 321,809 279 128,419 222,974 (22,539) (7,324) 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income (loss) 3,203     3,203     0
Other comprehensive income (loss) 826         826  
Treasury shares sold to Employee Stock Purchase Plan 224   (110)   334    
Issuance of deferred shares 0   (4,467)   4,467    
Other treasury share purchases (627)       (627)    
Stock-based compensation expense 6,488   6,488        
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Mar. 31, 2018 $ 331,923 $ 279 $ 130,330 $ 226,177 $ (18,365) $ (6,498) $ 0