Troubled Debts Restructured Defaulted (Detail) (Defaulted Loans, USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2012 Investment
Commercial | Real estate
Financing Receivable, Modifications [Line Items]
No. of Loans	1
Post-Modification Outstanding Recorded Balance	$ 109
Commercial | Other
Financing Receivable, Modifications [Line Items]
No. of Loans	1
Post-Modification Outstanding Recorded Balance	518
Residential Mortgage
Financing Receivable, Modifications [Line Items]
No. of Loans	1
Post-Modification Outstanding Recorded Balance	31
Consumer loans | Other
Financing Receivable, Modifications [Line Items]
No. of Loans	1
Post-Modification Outstanding Recorded Balance	$ 14