STOCK-BASED COMPENSATION - Schedule of Performance Cycles (Details) - USD ($) shares in Millions, $ in Millions	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018
3 year performance cycle, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
TSR Performance Relative to the Peer Group (1% Best)		57.00%
Payout as a Percent of the Base Award		61.00%
Number of Shares Distributed (less than) (in shares)		0.0
Cash Portion		$ 6.9
3 year performance cycle, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
TSR Performance Relative to the Peer Group (1% Best)	78.00%
Payout as a Percent of the Base Award	0.00%
Number of Shares Distributed (less than) (in shares)	0.0
Cash Portion	$ 0.0
2 year performance cycle, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average Payout as a Percent of the Base Award		44.00%
Number of Shares Distributed (less than) (in shares)		0.0
Cash Portion		$ 2.0
2 year performance cycle, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average Payout as a Percent of the Base Award	155.00%
Number of Shares Distributed (less than) (in shares)	0.1
Cash Portion	$ 2.2

Three year performance cycle Payout as a percent of the base award.

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- Definition

Three year performance cycle total shareholder return performance relative to the peer group one percent equal to best.

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- Definition

Two year Performance Cycle Payout As A Percent Of The Base Award

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- Definition

Amount of cash paid to settle liability for award under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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