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Summary of Significant Accounting Policies and New Accounting Standards (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Summary of Significant Accounting Policies and New Accounting Standards
Net income	$ 2,515	$ 16,314
Weighted average number of shares - basic (in shares)	40,454	40,369
Dilutive effect of stock options and restricted stock units	50	191
Weighted average number of shares - diluted (in shares)	40,504	40,560
Net income per share
basic (in dollars per share)	$ 0.06	$ 0.40
diluted diluted (in dollars per share)	$ 0.06	$ 0.40

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