NON-CONSOLIDATED VARIABLE INTEREST ENTITIES AND SERVICING ASSETS - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended		1 Months Ended		0 Months Ended	9 Months Ended	0 Months Ended
	Feb. 16, 2011	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Maximum [Member]	Sep. 30, 2014 Minimum [Member]	Apr. 30, 2004 Fbp Statutory Trust One [Member]	Sep. 30, 2004 Fbp Statutory Trust Two [Member]	Feb. 16, 2011 Cpg Gs [Member]	Sep. 30, 2014 Cpg Gs [Member]	Feb. 16, 2011 Prlp [Member]	Feb. 16, 2011 FirstBank [Member]
Servicing Liabilities At Fair Value [Line Items]
Principal amount of corporation serviced loans securitized through GNMA		$ 1,100,000,000
Variable rate trust preferred securities						100,000,000	125,000,000
Proceeds of the issuance, together with proceeds of the purchase						3,100,000	3,900,000
Principal amount of corporation's junior subordinated deferrable debentures						103,100,000	128,900,000
Balance of amortization with third party		48,800,000
Carrying value with third party		36,000,000
Percentage of weighted average yield with third party		2.17%
Loans Sold to CPG								269,300,000
Cash realized on sale of loan								88,500,000
Acquired Equity interest on disposal of loans held for sale											35.00%
Loans acquired on exchange of loan held for sale								136,100,000
Description of loan								30-day LIBOR plus 300 basis points
Percentage of ownership investment in unconsolidated entity										65.00%
Carrying amount of loan provided									37,200,000
Estimated life of investment	5 years 0 months 0 days
Equity in losses of unconsolidated entities related to the amortization									1,800,000
Line of credit facility provided to fund unfunded commitments								80,000,000
Working capital line of credit to fund certain expenses	20,000,000		7,000,000
Revolver agreement of credit facility provided amount outstanding									37,600,000
Working capital line of credit facility provided amount outstanding									0
Percentage of priority interest to be received on invested capital										12.00%	12.00%
Payment to be made on pro rata basis										35.00%	65.00%
Percentage of variation in assumptions				20.00%	10.00%
Working Capital Line Expiration Period		2 years 0 months 0 days
Interest Expense Accrued Trust Preferred Securities		$ 20,100,000