Loans - Loans in Process of Foreclosure (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Financing Receivable Impaired [Line Items]
Unpaid Principal Balance	$ 51,616	$ 59,989	$ 61,642
Total Recorded Investment	39,113	45,897
Residential Mortgage Loans [Member] | Loans In Process Of Foreclosure [Member]
Financing Receivable Impaired [Line Items]
Unpaid Principal Balance	2,130	1,714
Total Recorded Investment	2,051	1,661
Consumer Loans [Member] | Loans In Process Of Foreclosure [Member]
Financing Receivable Impaired [Line Items]
Unpaid Principal Balance	980	707
Total Recorded Investment	$ 685	$ 489