Loans Receivable, Net (Summary of Impaired Loans) (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Financing Receivable, Impaired [Line Items]
Impaired loans with no allocated allowance for loan losses	$ 18,612	$ 19,186
Impaired loans with allocated allowance for loan losses	11,397	9,305
Total	30,009	28,491
Amount of the allowance for loan losses allocated	$ 2,195	$ 2,165