Note 6. Employee Benefit Plans - Severance Plans - Components of Net Periodic Benefit Cost (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Components of Net Periodic Benefit Cost (before tax):
Service cost	$ 811	$ 934	$ 854
Interest cost	189	264	408
Amortization of prior service cost	286	286	285
Amortization of actuarial (gain) loss	633	774	753
Net periodic benefit cost recognized in the Consolidated Statements of Income	$ 1,919	$ 2,258	$ 2,300