BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	1 Months Ended	0 Months Ended	12 Months Ended
	May 30, 2012	May 31, 2014	Feb. 16, 2011	Dec. 31, 2014 subsidiaries	Dec. 31, 2013	Dec. 31, 2012
Disclosure Basisof Presentationand Significant Accounting Policies Additional Information [Abstract]
Purchased credit cards portfolio	$ 406
Statement [Line Items]
Subordinated interest in CPS/GS by Bank			35.00%
Materiality threshold for Rule 3-09						20.00%
Financing receivable, individually evaluated for impairment				1
Loan Value Deliquency Threshold To Be Valued At Fair Value Percent				60.00%
Fair value of loans purchased						353.2
Discount onf loans purchased						18.2
Discount rate used for calculation of mortgage servicing rights value				14.50%	14.50%
Impairment of Intangible Assets (Excluding Goodwill)						24.5
Rewards liability				9.0	8.1
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Forefeited					58,985
Nature Of Business [Line Items]
Period For Other Than Temporary Impairment				1 year 0 months 0 days
Guaranteed Loans Past Due				0 years 2 months 29 days
Period Of Residential Mortgage Loan That Are No Longer Accruing Interest				1 year 6 months 0 days	1 year 6 months 0 days
Loans Considered To Be Defaulted If Borrower Has Failed To Make Payment For Period Or More Than Period				0 years 2 months 29 days	0 years 2 months 29 days
Loans Past Due				0 years 0 months 30 days
Resdiential Mortgage Loans Charge Off				0 years 5 months 27 days
Rule 1-02(w)						50.00%
Changes In Allowance For Loan Losses		(4.8)
Modified Repurchase Agreements Threshold				10.00%
Investment In Subsidiaries Other Real Estate Owned				2
Wholy Owned Investments Subsidiaries				2
Base Rate Historical Charge Offs Period				1 year 0 months 0 days
Cummulative Charge Offs Period				2 years 0 months 0 days
Troubled Debt Restructurings Sustained Performance Period				0 years 6 months 0 days
Open End Loans [Member]
Nature Of Business [Line Items]
Consumer Loans Charge Off				0 years 5 months 27 days
Consumer Auto Loans And Finance Leases [Member]
Nature Of Business [Line Items]
Consumer Loans Reserved				0 years 3 months 28 days
Consumer Loans Charge Off				1 year 0 months 0 days
Puerto Rico [Member]
Nature Of Business [Line Items]
Offices				44
Virgin Islands [Member]
Nature Of Business [Line Items]
Offices				12
United States [Member]
Nature Of Business [Line Items]
Offices				10
Subsidiaries [Member]
Nature Of Business [Line Items]
Offices				6
First Express Subsidiary [Member]
Nature Of Business [Line Items]
Offices				2
Money Express Subsidiary [Member]
Nature Of Business [Line Items]
Offices				27
Cpg Gs [Member]
Statement [Line Items]
Sale of loans to CPG/GS			269.3