Note FDIC loss share asset (Activity in the FDIC loss share indemnification asset) (Parenthetical) (Detail) - USD ($) $ in Thousands	Sep. 30, 2017		Dec. 31, 2016	Sep. 30, 2016
Disclosure Activity In The F D I C Loss Share Indemnification Asset [Abstract]
Balance due to the FDIC for recoveries on covered assets	$ 924	[1]	$ 27,600	$ 7,080	[1]

[1] Balance due to the FDIC for recoveries on covered assets for the quarter and nine months ended September 30, 2016 amounting to $ 7.1 million was included in other liabilities in the accompanying Consolidated Statement of Condition (December 31, 2016 - $27.6 million).