CONVERTIBLE SENIOR NOTES (Tables)

3 Months Ended

Mar. 31, 2018

Debt Disclosure [Abstract]

Debt Net of Discount and Deferred Financing Costs

Debt, net of discounts and deferred financing costs at March 31, 2018 and December 31, 2017, consisted of the following (in thousands):

	March 31, 2018			December 31, 2017
Principal	$	517,500		$	517,500
Deferred financing costs		(9,326	)		(9,652	)
Debt discount, net		(133,965	)		(138,230	)
Net carrying amount	$	374,209		$	369,618