Indemnification Asset - Summary of Activity in Balance of Indemnification Asset (Detail) - USD ($) $ in Thousands		3 Months Ended
	May 09, 2017	Mar. 31, 2017
FDIC Indemnification Asset [Roll Forward]
Beginning balance		$ (744)
Effect of actual and estimated future covered losses and recoveries		(191)
Reimbursable (revenue) expenses incurred		(32)
Payments made to (received from) FDIC	$ (184)	72
Ending balance		(895)
Amount of indemnification liability recorded in other assets		(179)
Amount of indemnification liability recorded in other liabilities		(716)
Ending balance		$ (895)