Long-Term Debt - Schedule of Federal Home Loan Bank Advances (Parenthetical) (Detail) (Long-term debt, Federal Home Loan Bank of Boston, USD $)	12 Months Ended
	Jun. 30, 2014
Long-term debt | Federal Home Loan Bank of Boston
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Amortizing advances	$ 19,600,000
Combined monthly principal and interest payments required for amortizing advances	$ 360,000