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Note 7. Employee Benefit Plans - Severance Plans - Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2013
Components of Net Periodic Benefit Cost (before tax):      
Service cost $ 327 $ 267 $ 230
Interest cost 50 37 50
Amortization of prior service cost 28 40 40
Amortization of actuarial (gain) loss (146) 53 37
Net periodic benefit cost recognized in the Consolidated Statements of Income $ 259 $ 397 $ 357