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Earnings per Common Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share, Basic [Abstract]
Net income	$ 9,342	$ 9,941
Weighted average shares outstanding - basic (shares)	26,387	26,476
Basic EPS (US$ per share)	$ 0.35	$ 0.38
Earnings Per Share, Diluted [Abstract]
Dilutive stock options	50	86
Dilutive nonvested deferred shares	359	488
Diluted weighted average shares (shares)	26,796	27,050
Diluted EPS (US$ per share)	$ 0.35	$ 0.37

X

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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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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Nonvested equity-based payment awards that contain forfeitable rights to dividends or dividend equivalents (whether paid or unpaid) that result in incremental common shares.

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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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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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