Note 18. Earnings Per Share Statement (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Net Income (Loss)	$ (1,273)	$ 6,259	$ 6,612	$ 6,598	$ 7,525	$ 11,849	$ 7,115	$ 5,069	$ 18,196	$ 31,558	$ 16,752
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic									24	32	9
Net Income (Loss) Available to Common Stockholders, Basic									$ 18,172	$ 31,526	$ 16,743
Weighted Average Number of Shares Outstanding, Basic									25,243	25,857	26,745
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements									165	200	255
Incremental Common Shares Attributable to Participating Nonvested Shares with Non-forfeitable Dividend Rights									20	25	7
Weighted Average Number of Shares Outstanding, Diluted									25,428	26,082	27,007
Earnings Per Share, Basic	$ (0.05)	$ 0.25	$ 0.26	$ 0.26	$ 0.30	$ 0.46	$ 0.27	$ 0.19	$ 0.72	$ 1.22	$ 0.63
Earnings Per Share, Diluted	$ (0.05)	$ 0.25	$ 0.26	$ 0.26	$ 0.29	$ 0.46	$ 0.27	$ 0.19	$ 0.71	$ 1.21	$ 0.62