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		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	$ 684	$ 674	$ 674	$ 872
Provision (benefit) charged to expense	19	18	1,839	(172)
Repurchased loans and settlements charged off	(7)	(10)	(1,817)	(18)
Ending balance	$ 696	$ 682	$ 696	$ 682