Stockholders' Equity (Details Textual) $ in Thousands	12 Months Ended
	Jun. 30, 2017 USD ($) shares	Jun. 30, 2016 USD ($) shares	Jun. 30, 2015 USD ($)
Equity, Class of Treasury Stock [Line Items]
Preferred stock shares authorized	5,000,000.0	5,000,000.0
Preferred stock shares issued	0	0
Preferred stock shares outstanding	0	0
Annual maximum purchases authorized under stock buyback program | $	$ 25,000
Cash Dividend and Stock Repurchase Restriction | $	$ 5,000
Leverage Ratio Required to Repurchase Common Stock or Pay Cash Dividends, Maximum	2.50
Leverage Ratio Required to Repurchase Common Stock or Pay Cash Dividends, Minimum	1.00
Payments for Repurchase of Common Stock | $	$ 0	$ (10,461)	$ (5,000)
Treasury stock, shares	1,287,655	1,447,394