Note Loans (Covered loans in non-performing status and accruing loans past-due 90 days or more by loan class) (Detail) - Covered loans - USD ($) $ in Thousands		Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	[1]	$ 3,406	$ 3,915
Accruing loans past-due 90 days or more	[1]	0	0
Mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans		3,210	3,794
Accruing loans past-due 90 days or more		0	0
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans		196	121
Accruing loans past-due 90 days or more		$ 0	$ 0

[1] Covered loans accounted for under ASC Subtopic 310-30 are excluded from the above table as they are considered to be performing due to the application of the accretion method, in which these loans will accrete interest income over the remaining life of the loans using estim a ted cash flow analyses.