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Earnings Per Share (Details)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2013
Mar. 31, 2012
Earnings Per Share [Abstract]        
Basic 7,090 6,777 7,019 6,756
Stock options 293 165 250 136
Long-term incentive plan 25 75 28 78
Potential common shares, total 318 240 278 214
Diluted 7,408 7,017 7,297 6,970
Anti-dilutive shares   420 10 420