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Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Numerator:
Net Income	$ 4,147	$ 14,816
Denominator:
Weighted-average shares, basic (in shares)	25,434,000	25,523,000
Dilutive effect of share-based payments (in shares)	145,000	239,000
Weighted-average shares, diluted (in shares)	25,579,000	25,762,000
Net income per common share, basic (in dollars per share)	$ 0.16	$ 0.58
Net income per common share, diluted (in dollars per share)	$ 0.16	$ 0.58
Weighted average shares excluded from the computation of diluted earnings per share (in shares)	444,588	421,328

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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