Employee Stock Ownership Plan - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Initial term of employer loan	15 years
Related party transaction, Interest rate	1.67%
Compensation Expense	$ 4.4	$ 3.3	$ 2.1
Difference between cost and market value of committed to be released shares	$ 1.0	$ 0.3	$ 0.1