SECURITIES AVAILABLE FOR SALE - Amortized Cost and Fair Values of Investment Securities Available for Sale (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Total debt securities	$ 392,229
Available for sale securities, debt securities, Fair Value	394,051
Available for sale equity securities - financial services, Amortized Cost	50
Available for sale securities, equity securities - financial services, Fair Value	73
Available for sale securities, Total	392,279	$ 373,775
Available for sale securities, Gross Unrealized Gains	3,885	4,354
Available for sale securities, Gross Unrealized Losses	2,040	1,930
Securities available for sale	394,124	376,199
Debt Securities
Schedule of Available-for-sale Securities [Line Items]
Total debt securities	392,229	373,725
Available for sale securities, Gross Unrealized Gains	3,862	4,337
Available for sale securities, Gross Unrealized Losses	2,040	1,930
Available for sale securities, debt securities, Fair Value	394,051	376,132
Debt Securities \| U.S. Government Agencies
Schedule of Available-for-sale Securities [Line Items]
Total debt securities	47,209	23,910
Available for sale securities, Gross Unrealized Gains	200	71
Available for sale securities, Gross Unrealized Losses	182	23
Available for sale securities, debt securities, Fair Value	47,227	23,958
Debt Securities \| States and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Total debt securities	124,421	52,578
Available for sale securities, Gross Unrealized Gains	2,483	819
Available for sale securities, Gross Unrealized Losses	943	996
Available for sale securities, debt securities, Fair Value	125,961	52,401
Debt Securities \| U.S. Government Sponsored Enterprises (GSE) residential mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Total debt securities	132,389	174,220
Available for sale securities, Gross Unrealized Gains	229	1,573
Available for sale securities, Gross Unrealized Losses	269	197
Available for sale securities, debt securities, Fair Value	132,349	175,596
Debt Securities \| GSE residential collateralized mortgage obligations (CMOs)
Schedule of Available-for-sale Securities [Line Items]
Total debt securities	15,668	57,976
Available for sale securities, Gross Unrealized Gains	215	857
Available for sale securities, Gross Unrealized Losses	40	128
Available for sale securities, debt securities, Fair Value	15,843	58,705
Debt Securities \| GSE commercial CMOs
Schedule of Available-for-sale Securities [Line Items]
Total debt securities	63,598	65,041
Available for sale securities, Gross Unrealized Gains	735	1,017
Available for sale securities, Gross Unrealized Losses	563	586
Available for sale securities, debt securities, Fair Value	63,770	65,472
Debt Securities \| Private label CMOs
Schedule of Available-for-sale Securities [Line Items]
Total debt securities	8,944
Available for sale securities, Gross Unrealized Gains	0
Available for sale securities, Gross Unrealized Losses	43
Available for sale securities, debt securities, Fair Value	8,901
Equity Securities
Schedule of Available-for-sale Securities [Line Items]
Available for sale equity securities - financial services, Amortized Cost	50	50
Available for sale securities, Gross Unrealized Gains	23	17
Available for sale securities, Gross Unrealized Losses	0	0
Available for sale securities, equity securities - financial services, Fair Value	$ 73	$ 67

Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale.

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