SHAREHOLDERS’ EQUITY AND SHARE-BASED COMPENSATION RSU (Details)	3 Months Ended
Mar. 31, 2018 $ / shares shares
Restricted Stock
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity [Line Items]
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period, weighted average grant date fair value \| $ / shares	$ 24.54
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Restricted shares and restricted share units outstanding, beginning of period (in shares)	356,509
Restricted shares and restricted share units granted (in shares)	254,619
Restricted shares and restricted share units forfeited/canceled (in shares)	(43,697)
Restricted shares and restricted share units outstanding, end of period (in shares)	567,431
Service-Based \| Restricted Stock
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity [Line Items]
Share-based compensation arrangement by share-based payment award, alternate award vesting period	2 years
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Restricted shares and restricted share units outstanding, end of period (in shares)	565,000
Service-Based \| Minimum \| Employee and non employee stock options
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting period	3 years
Service-Based \| Minimum \| Restricted Stock
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting period	1 year
Service-Based \| Maximum \| Employee and non employee stock options
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting period	4 years
Service-Based \| Maximum \| Restricted Stock
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting period	4 years
Performance-Based \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Restricted shares and restricted share units outstanding, end of period (in shares)	2,000
Performance-Based \| Minimum \| Employee and non employee stock options
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity [Line Items]
Attainment above threshold performance levels, vesting percentage	50.00%
Performance-Based \| Minimum \| Restricted Stock
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity [Line Items]
Attainment above threshold performance levels, vesting percentage	80.00%
Performance-Based \| Maximum \| Employee and non employee stock options
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity [Line Items]
Attainment above threshold performance levels, vesting percentage	200.00%
Performance-Based \| Maximum \| Restricted Stock
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity [Line Items]
Attainment above threshold performance levels, vesting percentage	150.00%
Performance-Based, Vesting Period One \| Employee and non employee stock options
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage	25.00%
Performance-Based, Vesting Period One \| Restricted Stock
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage	33.00%
Performance-Based, Vesting Period Two \| Employee and non employee stock options
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage	25.00%
Performance-Based, Vesting Period Two \| Restricted Stock
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage	33.00%
Performance-Based, Vesting Period Three \| Employee and non employee stock options
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage	25.00%
Performance-Based, Vesting Period Three \| Restricted Stock
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage	33.00%
Performance-Based, Vesting Period Four \| Employee and non employee stock options
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage	25.00%

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Share-based Compensation Arrangement by Share-based Payment Award, Alternate Award Vesting Period

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The weighted average fair value at grant date for nonvested non-option equity-based awards issued during the period.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

+ 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)(1)(i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(ii)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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Percentage of vesting of share-based compensation awards.

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