Fair Value Disclosure - Assets Measured on Recurring Basis Roll Forward (Details) - Fair Value, Inputs, Level 3 - Fair Value, Measurements, Recurring - Auction Rate Securities - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance as of beginning of year	$ 2,633	$ 2,647
Total realized gains or (losses) included in net income	0	0
Total unrealized gains or (losses) included in other comprehensive income	10	(14)
Sales and settlements at par	0	0
Transfers in and/or out of Level 3	0	0
Balance as of end of year	$ 2,643	$ 2,633