The amount of outstanding funds that the entity is obligated to repay.

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The interest rate on borrowings. [Refer: Borrowings]

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

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No definition available.

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The nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

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The cash outflow for repayments of non-current borrowings. [Refer: Borrowings]

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LONG-TERM DEBT - 2010 Notes (Details) - USD ($) $ in Thousands	Apr. 07, 2017	Dec. 31, 2018	Apr. 07, 2010
2010 Notes
LONG-TERM DEBT
Principal			$ 600,000
Borrowings		$ 485,000
Series A
LONG-TERM DEBT
Interest rate	6.13%
Repayments of non-current borrowings	$ 115,000
Series B
LONG-TERM DEBT
Principal			$ 360,000
Interest rate			6.67%
Series C
LONG-TERM DEBT
Principal			$ 125,000
Interest rate			6.77%