Convertible Notes (Tables)

12 Months Ended

Dec. 31, 2020

Debt Disclosure [Abstract]

Schedule of Components of Net Carrying Amount of Convertible Notes

The following table sets forth the net carrying amount of the convertible notes:

	December 31, 2020			December 31, 2019
5.00% convertible notes	$	277,857		$	475,000
Unamortized discount		(15,229	)		(34,219	)
Unamortized transaction costs		(4,839	)		(10,571	)
Net carrying amount	$	257,789		$	430,210

Schedule of Interest Expenses

The following table sets forth total interest expenses recognized related to the convertible notes:

	Year Ended December 31,
	2020		2019		2018
Contractual coupon interest	$	22,929	$	23,750	$	5,302
Amortization of discount		7,863		7,468		2,152
Amortization of direct issue costs		2,454		2,375		28
Total	$	33,246	$	33,593	$	7,482