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STOCK PLANS AND SHARE BASED COMPENSATION (Performance-based Awards and Restricted Stock Units) (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Performance Based Awards [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of performance-based awards shares released as a percentage of target number, minimum | 0.00% |  |  |
Number of performance-based awards shares released as a percentage of target number, maximum | 200.00% |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments [Roll Forward] |  |  |  |
Outstanding, shares | 99,000 | 11,000 | 0 | 100,000
Granted, shares | 101,000 | 89,000 | 83,000 |
Vested, shares | (11,000) | 0 | (83,000) |
Forfeited or expired, shares | (2,000) | (78,000) | (100,000) |
Outstanding, weighted-average grant date fair value per share, beginning of period | $ 52.35 | $ 0.00 | $ 38.48 |
Granted, weighted-average grant date fair value per share | 46.26 | 52.36 | 53.93 |
Vested, weighted-average grant date fair value per share | 52.35 | 0.00 | 38.48 |
Forfeited or expired, weighted-average grant date fair value per share | 46.87 | 52.35 | 51.30 |
Outstanding, weighted-average grant date fair value per share, end of period | $ 46.25 | $ 52.35 | $ 0.00 |
Outstanding, weighted-average remaining contractual term (in years) | 0 years |  |  |
Share Based Compensation Arrangement By Share Based Payment Award, Equity Instruments Other Than Options, Outstanding, Aggregate Intrinsic Value | $ 6,714 |  |  |
Outstanding and expected to vest, shares | 99,000 |  |  |
Outstanding and expected to vest, weighted-average remaining contractual term (in years) | 0 years |  |  |
Outstanding and expected to vest, aggregate intrinsic value | $ 6,714 |  |  |
Grant date fair value of awards released | $ 600 |  | $ 3,200 |
Long-Term Performance-based Awards [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of performance-based awards shares released as a percentage of target number, minimum | 0.00% |  |  |
Number of performance-based awards shares released as a percentage of target number, maximum | 200.00% |  |  |
Performance based period | 3 years |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments [Roll Forward] |  |  |  |
Outstanding, shares | 150,000 | 129,000 | 61,000 | 0
Granted, shares | 78,000 | 72,000 | 61,000 |
Vested, shares | 0 | 0 | 0 |
Forfeited or expired, shares | (57,000) | (4,000) | 0 |
Outstanding, weighted-average grant date fair value per share, beginning of period | $ 53.75 | $ 55.51 | $ 0.00 |
Granted, weighted-average grant date fair value per share | 43.26 | 52.47 | 55.51 |
Vested, weighted-average grant date fair value per share | 0.00 | 0.00 | 0.00 |
Forfeited or expired, weighted-average grant date fair value per share | 55.35 | 57.76 | 0.00 |
Outstanding, weighted-average grant date fair value per share, end of period | $ 47.65 | $ 53.75 | $ 55.51 |
Outstanding, weighted-average remaining contractual term (in years) | 1 year 6 months 9 days |  |  |
Outstanding, aggregate intrinsic value | $ 10,177 |  |  |
Outstanding and expected to vest, shares | 113,000 |  |  |
Outstanding and expected to vest, weighted-average remaining contractual term (in years) | 1 year 6 months 5 days |  |  |
Outstanding and expected to vest, aggregate intrinsic value | $ 7,659 |  |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Awards vesting period | 4 years |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments [Roll Forward] |  |  |  |
Outstanding, shares | 718,000 | 681,000 | 692,000 | 714,000
Granted, shares | 331,000 | 319,000 | 281,000 |
Vested, shares | (270,000) | (267,000) | (267,000) |
Forfeited or expired, shares | (24,000) | (63,000) | (36,000) |
Outstanding, weighted-average grant date fair value per share, beginning of period | $ 46.98 | $ 43.86 | $ 38.97 |
Granted, weighted-average grant date fair value per share | 46.70 | 49.75 | 51.12 |
Vested, weighted-average grant date fair value per share | 45.13 | 42.49 | 38.57 |
Forfeited or expired, weighted-average grant date fair value per share | 47.21 | 45.71 | 42.74 |
Outstanding, weighted-average grant date fair value per share, end of period | $ 47.54 | $ 46.98 | $ 43.86 |
Outstanding, weighted-average remaining contractual term (in years) | 1 year 3 months |  |  |
Share Based Compensation Arrangement By Share Based Payment Award, Equity Instruments Other Than Options, Outstanding, Aggregate Intrinsic Value | $ 48,684 |  |  |
Outstanding and expected to vest, shares | 674,000 |  |  |
Outstanding and expected to vest, weighted-average remaining contractual term (in years) | 1 year 2 months 10 days |  |  |
Outstanding and expected to vest, aggregate intrinsic value | $ 45,711 |  |  |
Grant date fair value of awards released | $ 12,200 | $ 11,300 | $ 10,300 |
2007 Equity Incentive Plan [Member] | Performance Based Awards [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Reduction in number of shares available for issuance under the 2007 Plan per award granted | 2.0 |  |  |
2007 Equity Incentive Plan [Member] | Long-Term Performance-based Awards [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Reduction in number of shares available for issuance under the 2007 Plan per award granted | 2.0 |  |  |
2007 Equity Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Reduction in number of shares available for issuance under the 2007 Plan per award granted | 2.0 |  |  |
2016 Incentive Award Plan [Member] | Performance Based Awards [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Reduction in number of shares available for issuance under the 2007 Plan per award granted | 1 |  |  |
2016 Incentive Award Plan [Member] | Long-Term Performance-based Awards [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Reduction in number of shares available for issuance under the 2007 Plan per award granted | 1 |  |  |
2016 Incentive Award Plan [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Reduction in number of shares available for issuance under the 2007 Plan per award granted | 1 |  |  |

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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + 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 (c)(2)(iii)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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 (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + 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 (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. + 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 (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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