Loans held-for-sale, by main loan categories (Detail) (USD $)	Sep. 30, 2014		Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held-for-sale	$ 178,008,000	[1]	$ 110,426,000
Commercial Portfolio Segment Member
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held-for-sale	38,072,000	[1]	603,000
Commercial Real Estate Construction Financing Receivable Member
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held-for-sale	0	[1]	0
Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held-for-sale	106,832,000	[1]	109,823,000
Legacy [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held-for-sale	27,409	[1]	0
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held-for-sale	$ 5,695,000	[1]	$ 0

[1] Loans held-for-sale from discontinued operations are presented as part of "Assets from Discontinued Operations" in the Consolidated Statement of Condition. Refer to Note 3 to the consolidated financial statements for further information on the discontinued operations.