Cash Flow Information - Summary of Cash Flow Information (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Statement of Cash Flows [Abstract]
Interest paid on deposits and other borrowings	$ 31,804	$ 36,340
Income taxes paid	17,000	18,700
Transfers of loans to other real estate owned	7,784	10,856
Financing of other real estate owned sold	$ 287	$ 549