SECURITIES AVAILABLE FOR SALE - Amortized Cost and Fair Values of Investment Securities Available for Sale (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Amortized Cost
Total debt securities	$ 423,699
Equity securities	50
Totals	423,749	$ 401,919
Gross Unrealized Gains
Totals	3,962	3,138
Gross Unrealized Losses
Totals	4,110	4,903
Fair Value
Total debt securities	423,499
Equity securities	102
Totals	423,601	400,154
Debt Securities
Amortized Cost
Total debt securities	423,699	401,869
Gross Unrealized Gains
Total debt securities	3,910	3,097
Gross Unrealized Losses
Total debt securities	4,110	4,903
Fair Value
Total debt securities	423,499	400,063
Debt Securities \| U.S. Government Agencies
Amortized Cost
Total debt securities	8,541	39,569
Gross Unrealized Gains
Total debt securities	0	147
Gross Unrealized Losses
Total debt securities	50	124
Fair Value
Total debt securities	8,491	39,592
Debt Securities \| States and political subdivisions
Amortized Cost
Total debt securities	182,221	163,677
Gross Unrealized Gains
Total debt securities	2,522	1,782
Gross Unrealized Losses
Total debt securities	867	1,177
Fair Value
Total debt securities	183,876	164,282
Debt Securities \| GSE residential MBSs
Amortized Cost
Total debt securities	107,928	116,022
Gross Unrealized Gains
Total debt securities	983	928
Gross Unrealized Losses
Total debt securities	0	6
Fair Value
Total debt securities	108,911	116,944
Debt Securities \| GSE residential CMOs
Amortized Cost
Total debt securities	115,645	72,411
Gross Unrealized Gains
Total debt securities	400	240
Gross Unrealized Losses
Total debt securities	2,961	3,268
Fair Value
Total debt securities	113,084	69,383
Debt Securities \| GSE commercial CMOs
Amortized Cost
Total debt securities	5,144	5,148
Gross Unrealized Gains
Total debt securities	0	0
Gross Unrealized Losses
Total debt securities	205	292
Fair Value
Total debt securities	4,939	4,856
Debt Securities \| Private label CMOs
Amortized Cost
Total debt securities	4,220	5,042
Gross Unrealized Gains
Total debt securities	5	0
Gross Unrealized Losses
Total debt securities	27	36
Fair Value
Total debt securities	4,198	5,006
Equity Securities
Amortized Cost
Equity securities	50	50
Gross Unrealized Gains
Equity securities	52	41
Gross Unrealized Losses
Equity securities	0	0
Fair Value
Equity securities	$ 102	$ 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.