Transfers of Financial Assets (Reserve for loan repurchases) (Detail) - SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	$ 633	$ 676	$ 508	$ 674
Provision charged to expense	27	1,813	49	1,820
(Charge-offs/settlements, net) recoveries, net	(5)	(1,805)	98	(1,810)
Ending balance	$ 655	$ 684	$ 655	$ 684