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Note 12. Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Net income $ 10,122 $ 4,475
Weighted Average Number of Shares Outstanding, Basic 28,078 29,292
Dilutive effect of average outstanding performance shares 17 57
Weighted Average Number of Shares Outstanding, Diluted 28,095 29,349
Earnings Per Share, Basic $ 0.36 $ 0.15
Earnings Per Share, Diluted $ 0.36 $ 0.15