STOCK-BASED COMPENSATION (Details 4)	Dec. 31, 2016 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Sub-limit for all types of stock awards included in available to be issued stock options (in shares)	3,287,550
2000 Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Long Term Incentive Plan authorized additional shares reserved for issuance (in shares)	245,486
Number of shares available for grant or purchase (in shares)	97,444
2003 Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Long Term Incentive Plan authorized additional shares reserved for issuance (in shares)	365,005
Number of shares available for grant or purchase (in shares)	235,305
2006 Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Long Term Incentive Plan authorized additional shares reserved for issuance (in shares)	1,360,312
Number of shares available for grant or purchase (in shares)	87,116
2009 Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Long Term Incentive Plan authorized additional shares reserved for issuance (in shares)	2,660,662
Number of shares available for grant or purchase (in shares)	122,710
2014 Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Long Term Incentive Plan authorized additional shares reserved for issuance (in shares)	3,000,000
Number of shares available for grant or purchase (in shares)	244,975
2016 Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Long Term Incentive Plan authorized additional shares reserved for issuance (in shares)	6,000,000
Number of shares available for grant or purchase (in shares)	6,000,000
Long Term Incentive Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Long Term Incentive Plan authorized additional shares reserved for issuance (in shares)	13,631,465
Long Term Incentive Stock Option Plan Expired And Assumed
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant or purchase (in shares)	6,787,550
1997 Stock Plan For Non Employee Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Long Term Incentive Plan authorized additional shares reserved for issuance (in shares)	553,402
Number of shares available for grant or purchase (in shares)	460,663
Employee deferral Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Long Term Incentive Plan authorized additional shares reserved for issuance (in shares)	45,627
Number of shares available for grant or purchase (in shares)	45,623
Stock Purchase Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Long Term Incentive Plan authorized additional shares reserved for issuance (in shares)	599,029
Number of shares available for grant or purchase (in shares)	506,286
Committed shares reserved under the stock purchase plans for non employee Directors	92,739

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No definition available.

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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