Securities - Narrative (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Jun. 30, 2014
Schedule of Investments [Line Items]
Proceeds from Sale of Available-for-sale Securities, Debt	$ 0	$ 0
Gross realized gains on sale of available-for-sale securities	0	0
Other than temporary impairment of available-for-sale security	0	0
Securities Pledged as Collateral for Deposits in Excess of FDIC Insurance Limits, Fair Value	205.4		210.0
Securities Pledged as Collateral for Potential Borrowings at the Federal Reserve Bank Discount Window	4.9		4.9
Federal Home Loan Bank Stock [Member]
Schedule of Investments [Line Items]
Other than temporary impairment of available-for-sale security	$ 0	$ 0