Loans - Loans in Process of Foreclosure (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Financing Receivable Impaired [Line Items]
Unpaid Principal Balance	$ 57,378	$ 51,902	$ 58,271
Total Recorded Investment	42,611	39,659
Residential Mortgage Loans [Member] | Loans In Process Of Foreclosure [Member]
Financing Receivable Impaired [Line Items]
Unpaid Principal Balance	2,690	1,294
Total Recorded Investment	2,360	1,162
Consumer Loans [Member] | Loans In Process Of Foreclosure [Member]
Financing Receivable Impaired [Line Items]
Unpaid Principal Balance	1,036	845
Total Recorded Investment	$ 799	$ 643