Fair Value Disclosure - Assets Measured on Recurring Basis Roll Forward (Details) (Fair Value, Inputs, Level 3 [Member], Fair Value, Measurements, Recurring [Member], Auction rate securities [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Auction rate securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of the period	$ 2,647	$ 2,637	$ 2,647	$ 2,637
Total realized gains or (losses) included in net income	0	0	0	0
Total unrealized gains or (losses) included in other comprehensive income	0	0	0	0
Sales and settlements at par	0	0	0	0
Transfers in and/or out of Level 3	0	0	0	0
Balance, ending of the period	$ 2,647	$ 2,637	$ 2,647	$ 2,637