SECURITIES AVAILABLE FOR SALE - Amortized Cost and Fair Values of Investment Securities Available for Sale (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Amortized Cost
Total debt securities	$ 397,526
Equity securities	50
Totals	397,576	$ 401,919
Gross Unrealized Gains
Totals	6,633	3,138
Gross Unrealized Losses
Totals	2,305	4,903
Fair Value
Total debt securities	401,793
Equity securities	111
Totals	401,904	400,154
Debt Securities
Amortized Cost
Total debt securities	397,526	401,869
Gross Unrealized Gains
Total debt securities	6,572	3,097
Gross Unrealized Losses
Total debt securities	2,305	4,903
Fair Value
Total debt securities	401,793	400,063
Debt Securities \| U.S. Government Agencies
Amortized Cost
Total debt securities	7,311	39,569
Gross Unrealized Gains
Total debt securities	23	147
Gross Unrealized Losses
Total debt securities	0	124
Fair Value
Total debt securities	7,334	39,592
Debt Securities \| States and political subdivisions
Amortized Cost
Total debt securities	159,185	163,677
Gross Unrealized Gains
Total debt securities	4,640	1,782
Gross Unrealized Losses
Total debt securities	394	1,177
Fair Value
Total debt securities	163,431	164,282
Debt Securities \| GSE residential MBSs
Amortized Cost
Total debt securities	103,590	116,022
Gross Unrealized Gains
Total debt securities	1,186	928
Gross Unrealized Losses
Total debt securities	0	6
Fair Value
Total debt securities	104,776	116,944
Debt Securities \| GSE residential CMOs
Amortized Cost
Total debt securities	113,339	72,411
Gross Unrealized Gains
Total debt securities	705	240
Gross Unrealized Losses
Total debt securities	1,723	3,268
Fair Value
Total debt securities	112,321	69,383
Debt Securities \| GSE commercial CMOs
Amortized Cost
Total debt securities	5,141	5,148
Gross Unrealized Gains
Total debt securities	0	0
Gross Unrealized Losses
Total debt securities	168	292
Fair Value
Total debt securities	4,973	4,856
Debt Securities \| Private label CMOs
Amortized Cost
Total debt securities	3,542	5,042
Gross Unrealized Gains
Total debt securities	18	0
Gross Unrealized Losses
Total debt securities	20	36
Fair Value
Total debt securities	3,540	5,006
Debt Securities \| Asset-backed
Amortized Cost
Total debt securities	5,418
Gross Unrealized Gains
Total debt securities	0
Gross Unrealized Losses
Total debt securities	0
Fair Value
Total debt securities	5,418
Equity Securities
Amortized Cost
Equity securities	50	50
Gross Unrealized Gains
Equity securities	61	41
Gross Unrealized Losses
Equity securities	0	0
Fair Value
Equity securities	$ 111	$ 91

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

Name:	us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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