Loans - Loans in Process of Foreclosure (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014
Financing Receivable Impaired [Line Items]
Unpaid Principal Balance		$ 59,989	$ 61,863
Total Recorded Investment	$ 43,854	45,897	$ 47,080
Residential Mortgage Loans [Member]
Financing Receivable Impaired [Line Items]
Total Recorded Investment	19,239	19,209
Residential Mortgage Loans [Member] | Loans In Process Of Foreclosure
Financing Receivable Impaired [Line Items]
Unpaid Principal Balance	2,176	1,714
Total Recorded Investment	2,105	1,661
Consumer Loans [Member]
Financing Receivable Impaired [Line Items]
Total Recorded Investment	11,023	11,843
Consumer Loans [Member] | Loans In Process Of Foreclosure
Financing Receivable Impaired [Line Items]
Unpaid Principal Balance	1,035	707
Total Recorded Investment	$ 846	$ 489