Note FDIC loss share (expense) income (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
F D I C Loss Share Expense Income [Line Items]
(Amortization) accretion of indemnification asset	$ (4,042)	$ (27,316)
80% mirror accounting on credit impairment losses	(2,093)	8,246
80% mirror accounting on reimbursable expenses	3,950	21,545
80% mirror accounting on recoveries on covered assets, including rental income on OREOs, subject to reimbursement to the FDIC	(645)	(2,619)
Change in true-up payment obligation	(443)	4,164
Other	127	119
Continuing Operations
F D I C Loss Share Expense Income [Line Items]
FDIC loss share (expense) income	$ (3,146)	$ 4,139