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Earnings Per Share: Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Details
Net Income (Loss)	$ 6,358	$ 4,491	$ 19,423
Weighted average number of shares outstanding, Basic	22,450,252	22,392,744	22,367,174
Basic earnings	$ 0.28	$ 0.20	$ 0.87
Weighted average number of shares outstanding, Diluted	22,494,151	22,431,839	22,369,175
Effect of dilutive stock options	44,000	39,000	2,000
Weighted average common shares and common stock equivalents	22,494,000	22,432,000	22,369,000
Diluted earnings	$ 0.28	$ 0.20	$ 0.87

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