LOAN PORTFOLIO - Breakdown Between Accrual and Nonaccrual Status of TDRs (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014		Mar. 31, 2014
Financing Receivable Modifications [Line Items]
Total TDR loans	$ 705,123	[1]	$ 694,453	[2]	$ 622,320
Performing Financing Receivable [Member] | Non Accrual [Member]
Financing Receivable Modifications [Line Items]
Total TDR loans	$ 121,900		$ 52,800

[1] Excludes TDRs held for sale amounting to $45.7 million as of March 31, 2015.

[2] Excludes TDRs held for sale amounting to $45.7 million as of December 31, 2014.