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INVESTMENT SECURITIES - Additional Information (Detail) $ in Thousands	Jun. 30, 2015 USD ($) security	Dec. 31, 2014 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Securities available for sale, pledged | $	$ 32,700	$ 27,100
Securities available for sale portfolio	100
Available for sale securities in unrealized loss position	39
Securities held to maturity portfolio	6
Held to maturity securities in unrealized loss position	1
Amount of rated securities portfolio | $	$ 487,293	$ 345,695
AAA, AA or A
Schedule of Available-for-sale Securities [Line Items]
Amount of rated securities portfolio | $	486,200
BBB
Schedule of Available-for-sale Securities [Line Items]
Amount of rated securities portfolio | $	$ 1,100

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Number of available for sale securities in portfolio.

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Amount of debt securities categorized neither as held-to-maturity nor trading.

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The fair value of available-for-sale securities that serve as collateral for borrowings.

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Number of investment positions in available-for-sale investments in a continuous unrealized loss position for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement.

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