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STOCK-BASED COMPENSATION - Narrative (Details) $ in Millions | 6 Months Ended
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Jun. 30, 2017 USD ($) plan shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Share-based compensation arrangement by share-based payment award, number of plans | plan | 2
Grants in period, net of forfeitures (in shares) | 186,853
Requisite service periods of awards, in years | 3 years
Stock options |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Total unrecognized compensation costs | $ | $ 5.3
Weighted-average period for cost recognition, in years | 3 years
Stock options | Minimum |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Stock options exercisable, vesting period, in years | 3 years
Stock options | Maximum |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Stock options exercisable, vesting period, in years | 4 years
Stock options | Director |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Stock options exercisable, vesting period, in years | 1 year
Stock options | Employee |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Expiration period, in years | 8 years
Stock options | Directors and certain executive officers | Minimum |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Expiration period, in years | 8 years
Stock options | Directors and certain executive officers | Maximum |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Expiration period, in years | 10 years
Restricted stock awards/stock units |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Stock options exercisable, vesting period, in years | 3 years
Total unrecognized compensation costs | $ | $ 27.8
Weighted-average period for cost recognition, in years | 2 years
Awards granted during the period (in shares) | 340,078
Performance shares |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Awards granted during the period (in shares) | 133,333

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- Definition Unrecognized cost of unvested share-based compensation awards. + 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 (i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition 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. + 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)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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