LOAN PORTFOLIO - Corporation's TDR Activity (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014		Sep. 30, 2014
Schedule Of Financing Receivables [Line Items]
Beginning Balance of TDRs	$ 628,233		$ 630,258	[1]
New TDRs	94,864		149,609
Increases to existing TDRs (disbursements)	1,197		1,331
Charge-offs post modification	(12,598)		(39,246)
Sales	0		0
Foreclosures	(768)		(3,369)
Removed from TDR classification	0		0
TDRs transferred to loans held for sale	0		0
Paid-off and partial payments	(9,785)		(37,440)
Ending balance of TDRs	$ 701,143	[2]	$ 701,143	[2]

[1]  Excludes TDRs held for sale amounting to $45.9 million as of December 31, 2013.

[2]  Excludes TDRs held for sale amounting to $45.7 million as of September 30, 2014