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Summary of Significant Accounting Policies and New Accounting Standards (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Accounting Policies [Abstract]
Net income	$ 18,753	$ 18,932
Weighted average number of shares - basic	39,092,000	38,900,000
Dilutive effect of stock options and warrant	920,000	684,000
Weighted average number of shares - diluted	40,012,000	39,584,000
Net income per share:
basic (in dollars per share)	$ 0.48	$ 0.49
diluted (in dollars per share)	$ 0.47	$ 0.48

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