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, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	$ 676	$ 664	$ 674	$ 872
Provision (benefit) charged to expense	1,813	13	1,820	(190)
Repurchased loans and settlements charged off	(1,805)	(3)	(1,810)	(8)
Ending balance	$ 684	$ 674	$ 684	$ 674