FAIR VALUE MEASUREMENTS AFS (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Available for Sale:
Amortized Cost	$ 165,278	$ 135,449
Fair Value	164,183	134,501
Unrealized Losses	(1,095)	(948)
Municipal bonds
Available for Sale:
Amortized Cost	16,046	34,021
Fair Value	15,206	33,977
Unrealized Losses	(840)	(44)
Variable rate demand notes
Available for Sale:
Amortized Cost	19,700
Fair Value	19,700
Corporate bonds
Available for Sale:
Amortized Cost	122,568	95,286
Fair Value	122,298	94,403
Unrealized Losses	(270)	(883)
Government securities
Available for Sale:
Amortized Cost	2,411	2,430
Fair Value	2,426	2,430
Unrealized Gains	15
Certificates of deposit
Available for Sale:
Amortized Cost	4,553	3,692
Fair Value	$ 4,553	3,676
Unrealized Losses		(16)
Mutual funds
Available for Sale:
Amortized Cost		20
Fair Value		15
Unrealized Losses		$ (5)

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=65884222&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (aa)
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26610-111562

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
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-Section 50
-Paragraph 2
-Subparagraph (c)
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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.2)
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