FAIR VALUE - Assets and Liabilities Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Investment securities available-for-sale:
Discount rate used for calculation of mortgage servicing rights value	14.50%	14.50%
Fair value input prepayment rate	31.00%	29.00%
Securities available for sale
Discount rate used for calculation of mortgage servicing rights value	14.50%	14.50%
Fair value input prepayment rate	31.00%	29.00%
Private Label Mbs [Member]
Investment securities available-for-sale:
Fair Value	$ 36,116
Discount rate used for calculation of mortgage servicing rights value	14.50%
Securities available for sale
Fair Value	36,116
Discount rate used for calculation of mortgage servicing rights value	14.50%
US States And Political Subdivisions Member [Member]
Investment securities available-for-sale:
Fair Value	2,766
Unobservable input prepayment rate	5.57%
Securities available for sale
Fair Value	$ 2,766
Unobservable input prepayment rate	5.57%
Discounted Cash Flow [Member] | Private Label Mbs [Member]
Investment securities available-for-sale:
Valuation technique	Discounted cash flow
Securities available for sale
Valuation technique	Discounted cash flow
Discounted Cash Flow [Member] | US States And Political Subdivisions Member [Member]
Investment securities available-for-sale:
Valuation technique	Discounted cash flow
Securities available for sale
Valuation technique	Discounted cash flow
Minimum [Member]
Investment securities available-for-sale:
Fair value input prepayment rate	19.21%	15.86%
Securities available for sale
Fair value input prepayment rate	19.21%	15.86%
Minimum [Member] | Private Label Mbs [Member]
Investment securities available-for-sale:
Unobservable input prepayment rate	19.21%
Fair value projected Cumulative Loss Rate	0.94%
Securities available for sale
Unobservable input prepayment rate	19.21%
Fair value projected Cumulative Loss Rate	0.94%
Maximum [Member]
Investment securities available-for-sale:
Fair value input prepayment rate	100.00%	100.00%
Securities available for sale
Fair value input prepayment rate	100.00%	100.00%
Maximum [Member] | Private Label Mbs [Member]
Investment securities available-for-sale:
Unobservable input prepayment rate	100.00%
Fair value projected Cumulative Loss Rate	80.00%
Securities available for sale
Unobservable input prepayment rate	100.00%
Fair value projected Cumulative Loss Rate	80.00%