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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	Mar. 31, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Total temporarily impaired securities, less than 12 months, fair value	$ 29,174	$ 183,310
Total temporarily impaired securities, less than 12 months, unrealized losses	191	1,430
Total temporarily impaired securities, 12 months or more, fair value	7,868	18,376
Total temporarily impaired securities, 12 months or more, unrealized losses	385	610
Total temporarily impaired securities, total, fair value	37,042	201,686
Total temporarily impaired securities, total, unrealized losses	576	2,040
U.S. Government Agencies
Schedule of Available-for-sale Securities [Line Items]
Total temporarily impaired securities, less than 12 months, fair value	19,951	27,640
Total temporarily impaired securities, less than 12 months, unrealized losses	121	182
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	19,951	27,640
Total temporarily impaired securities, total, unrealized losses	121	182
States and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Total temporarily impaired securities, less than 12 months, fair value	1,205	30,252
Total temporarily impaired securities, less than 12 months, unrealized losses	2	373
Total temporarily impaired securities, 12 months or more, fair value	5,313	14,139
Total temporarily impaired securities, 12 months or more, unrealized losses	365	570
Total temporarily impaired securities, total, fair value	6,518	44,391
Total temporarily impaired securities, total, unrealized losses	367	943
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
Total temporarily impaired securities, less than 12 months, unrealized losses		269
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		82,911
Total temporarily impaired securities, total, unrealized losses		269
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	0
Total temporarily impaired securities, less than 12 months, unrealized losses	0	0
Total temporarily impaired securities, 12 months or more, fair value	2,555	4,237
Total temporarily impaired securities, 12 months or more, unrealized losses	20	40
Total temporarily impaired securities, total, fair value	2,555	4,237
Total temporarily impaired securities, total, unrealized losses	20	40
GSE commercial CMOs
Schedule of Available-for-sale Securities [Line Items]
Total temporarily impaired securities, less than 12 months, fair value		33,606
Total temporarily impaired securities, less than 12 months, unrealized losses		563
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		33,606
Total temporarily impaired securities, total, unrealized losses		563
Private label CMOs
Schedule of Available-for-sale Securities [Line Items]
Total temporarily impaired securities, less than 12 months, fair value	8,018	8,901
Total temporarily impaired securities, less than 12 months, unrealized losses	68	43
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	8,018	8,901
Total temporarily impaired securities, total, unrealized losses	$ 68	$ 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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Amount of accumulated pre-tax unrealized loss on securities classified as available-for-sale in Accumulated Other Comprehensive Income (AOCI).

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This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
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-Section 50
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-Publisher FASB
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