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LONG-TERM DEBT - Summary of Long-Term Debt (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Debt Instrument [Line Items] |  |
Par Value | $ 175,000 | $ 175,000
Unamortized Debt Issuance Cost and Discount | $ (1,521) | (1,579)
Senior Notes | 5.25% Senior Notes Due April 15, 2025 |  |
Debt Instrument [Line Items] |  |
Stated interest rate | 5.25% |
Par Value | $ 175,000 | 175,000
Unamortized Debt Issuance Cost and Discount | $ (1,521) | $ (1,579)

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