Fair Value Disclosure - Long-term Investments (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Mar. 31, 2016	Jun. 30, 2015
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term and long-term debt	$ 93,795	$ 94,412
Auction rate securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	2,750	2,750
Gross Unrealized Holding Gains	0	0
Gross Unrealized Holding Losses	(117)	(117)
Fair Value	2,633	2,633
Auction rate securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 0	$ 0