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DEBT - Convertible Debt (Details) - 2019 Notes - Senior Notes	Mar. 19, 2019 USD ($) day $ / shares
Debt Instrument [Line Items]
Face amount	$ 230,000,000.0
Interest rate, stated percentage	2.50%
Proceeds from issuance of debt	$ 222,900,000
Commissions and expenses related to offering of debt	$ 7,100,000
Convertible, conversion ratio	0.0541082
Convertible, conversion price (in dollars per share) | $ / shares	$ 18.48
Convertible, threshold trading days | day	20
Convertible, threshold consecutive trading days | day	30
Convertible, threshold percentage of stock price trigger	130.00%

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The price per share of the conversion feature embedded in the debt instrument.

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