FAIR VALUE - Assets and Liabilities Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3) (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Sep. 30, 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		13.28%	14.50%
Fair value input prepayment rate		13.70%	25.00%
Private Label Mbs [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value	$ 22,130	$ 22,130
Discount rate used for calculation of mortgage servicing rights value	13.28%
Private Label Mbs [Member] | Discounted Cash Flow [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Valuation technique		Discounted cash flow
US States And Political Subdivisions Member [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value	$ 2,167	$ 2,167
Unobservable input prepayment rate	3.00%	3.00%
US States And Political Subdivisions Member [Member] | Discounted Cash Flow [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Valuation technique		Discounted cash flow
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		12.03%
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]
Unobservable input prepayment rate	6.50%	6.50%
Fair value projected Cumulative Loss Rate	0.20%	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		13.50%
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]
Unobservable input prepayment rate	22.50%	22.50%
Fair value projected Cumulative Loss Rate	9.10%	9.10%