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SECURITIES AVAILABLE FOR SALE - Gross Unrealized Losses and Fair Value of Company's Available for Sale Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Total temporarily impaired securities, Less Than 12 Months, Fair Value	$ 183,310	$ 77,404
Total temporarily impaired securities, Less Than 12 Months, Unrealized Losses	1,430	325
Total temporarily impaired securities, 12 Months or More, Fair Value	18,376	74,814
Total temporarily impaired securities, 12 Months or More, Unrealized Losses	610	1,605
Total temporarily impaired securities, Total, Fair Value	201,686	152,218
Total temporarily impaired securities, Total, Unrealized Losses	2,040	1,930
U.S. Government Agencies
Schedule of Available-for-sale Securities [Line Items]
Total temporarily impaired securities, Less Than 12 Months, Fair Value	27,640	0
Total temporarily impaired securities, Less Than 12 Months, Unrealized Losses	182	0
Total temporarily impaired securities, 12 Months or More, Fair Value	0	9,012
Total temporarily impaired securities, 12 Months or More, Unrealized Losses	0	23
Total temporarily impaired securities, Total, Fair Value	27,640	9,012
Total temporarily impaired securities, Total, Unrealized Losses	182	23
States and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Total temporarily impaired securities, Less Than 12 Months, Fair Value	30,252	0
Total temporarily impaired securities, Less Than 12 Months, Unrealized Losses	373	0
Total temporarily impaired securities, 12 Months or More, Fair Value	14,139	35,833
Total temporarily impaired securities, 12 Months or More, Unrealized Losses	570	996
Total temporarily impaired securities, Total, Fair Value	44,391	35,833
Total temporarily impaired securities, Total, Unrealized Losses	943	996
U.S. Government Sponsored Enterprises (GSE) residential mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Total temporarily impaired securities, Less Than 12 Months, Fair Value	82,911	65,474
Total temporarily impaired securities, Less Than 12 Months, Unrealized Losses	269	197
Total temporarily impaired securities, 12 Months or More, Fair Value	0	0
Total temporarily impaired securities, 12 Months or More, Unrealized Losses	0	0
Total temporarily impaired securities, Total, Fair Value	82,911	65,474
Total temporarily impaired securities, Total, Unrealized Losses	269	197
GSE residential collateralized mortgage obligations (CMOs)
Schedule of Available-for-sale Securities [Line Items]
Total temporarily impaired securities, Less Than 12 Months, Fair Value	0	11,930
Total temporarily impaired securities, Less Than 12 Months, Unrealized Losses	0	128
Total temporarily impaired securities, 12 Months or More, Fair Value	4,237	0
Total temporarily impaired securities, 12 Months or More, Unrealized Losses	40	0
Total temporarily impaired securities, Total, Fair Value	4,237	11,930
Total temporarily impaired securities, Total, Unrealized Losses	40	128
GSE commercial CMOs
Schedule of Available-for-sale Securities [Line Items]
Total temporarily impaired securities, Less Than 12 Months, Fair Value	33,606	0
Total temporarily impaired securities, Less Than 12 Months, Unrealized Losses	563	0
Total temporarily impaired securities, 12 Months or More, Fair Value	0	29,969
Total temporarily impaired securities, 12 Months or More, Unrealized Losses	0	586
Total temporarily impaired securities, Total, Fair Value	33,606	29,969
Total temporarily impaired securities, Total, Unrealized Losses	563	$ 586
Private label CMOs
Schedule of Available-for-sale Securities [Line Items]
Total temporarily impaired securities, Less Than 12 Months, Fair Value	8,901
Total temporarily impaired securities, Less Than 12 Months, Unrealized Losses	43
Total temporarily impaired securities, 12 Months or More, Fair Value	0
Total temporarily impaired securities, 12 Months or More, Unrealized Losses	0
Total temporarily impaired securities, Total, Fair Value	8,901
Total temporarily impaired securities, Total, Unrealized Losses	$ 43

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Amount of accumulated pre-tax unrealized loss on securities classified as available-for-sale that have been in a loss position for twelve months or longer recognized in Accumulated Other Comprehensive Income (AOCI).

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