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Earnings Per Share - Basic and diluted earnings per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Numerator:
Net income per consolidated statements of income	$ 813	$ 2,903
Less: Allocation of earnings to participating securities	(14)	(30)
Net income allocated to common stock	799	2,873
Basic earnings per share computation:
Net income allocated to common stock	$ 799	$ 2,873
Weighted average common shares outstanding, including shares considered participating securities	7,851	7,753
Less: Weighted average participating securities outstanding	(131)	(81)
Weighted average shares of common stock	7,720	7,672
Basic earnings per share	$ 0.10	$ 0.37
Diluted earnings per share computation:
Net income allocated to common stock	$ 799	$ 2,873
Undistributed earnings re-allocated to participating securities
Numerator for diluted earnings per share	$ 799	$ 2,873
Weighted average common shares outstanding for basic earnings per share	7,720	7,672
Incremental shares from stock options	53	60
Weighted average shares and dilutive potential common shares	7,773	7,732
Diluted earnings per share	$ 0.10	$ 0.37

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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