INVESTMENTS (Gross Unrealized Losses and Fair Value by Length of Time of Available-For-Sale Securities) (Detail) $ in Thousands	Sep. 30, 2016 USD ($) Securities	Dec. 31, 2015 USD ($) Securities
Schedule Of Available For Sale Securities [Line Items]
Number of Securities \| Securities	13	34
Fair Value	$ 29,190	$ 220,134
Less than 12 months	42	1,736
More than 12 months	117	2,210
Total Unrealized Losses	$ 159	$ 3,946
Us Government Agencies Debt Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Number of Securities \| Securities		7
Fair Value		$ 78,555
Less than 12 months		1,020
More than 12 months		314
Total Unrealized Losses		$ 1,334
U S States and Political Subdivisions [Member]
Schedule Of Available For Sale Securities [Line Items]
Number of Securities \| Securities	4
Fair Value	$ 4,004
Less than 12 months	1
More than 12 months	25
Total Unrealized Losses	$ 26
Mortgage Backed Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Number of Securities \| Securities	8	26
Fair Value	$ 24,163	$ 140,556
Less than 12 months	41	716
More than 12 months	26	1,830
Total Unrealized Losses	$ 67	$ 2,546
Trust Preferred Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Number of Securities \| Securities	1	1
Fair Value	$ 1,023	$ 1,023
Less than 12 months	0	0
More than 12 months	66	66
Total Unrealized Losses	$ 66	$ 66

Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27290-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27337-111563

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Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27337-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27290-111563

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Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for less than twelve months.

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