Subordinated Debt (Detail) - Subordinated Debt Due May Twenty Twenty Five - USD ($)	3 Months Ended
	Sep. 30, 2015	May. 28, 2015
Debt and Financial Instruments [Line Items]
Debt instrument, face amount	$ 7,000,000	$ 7,000,000
Less: Issuance costs	(161,000)
Proceeds from Debt, Net of Issuance Costs	$ 6,839,000