FAIR VALUE - Assets and Liabilities Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Discount rate used for calculation of mortgage servicing rights value	14.10%	14.50%
Fair value input prepayment rate	13.80%	25.00%
Unobservable input projected cumulative loss rate	4.00%
Private Label Mbs [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value	$ 20,693
Discount rate used for calculation of mortgage servicing rights value	14.10%
Puerto Rico Government Obligations [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value	$ 2,121
Unobservable input prepayment rate	3.00%
Discounted Cash Flow [Member] | Private Label Mbs [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Valuation technique	Discounted cash flows
Discounted Cash Flow [Member] | Puerto Rico Government Obligations [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Valuation technique	Discounted cash flows
Minimum [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Discount rate used for calculation of mortgage servicing rights value	12.88%
Fair value input prepayment rate	6.50%	15.92%
Minimum [Member] | Private Label Mbs [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value input prepayment rate	6.50%
Fair value projected Cumulative Loss Rate	0.20%
Maximum [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Discount rate used for calculation of mortgage servicing rights value	14.43%
Fair value input prepayment rate	22.50%	31.25%
Maximum [Member] | Private Label Mbs [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value input prepayment rate	22.50%
Fair value projected Cumulative Loss Rate	8.60%