Long-Term Debt

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Long-Term Debt

Note 7 – Long-Term Debt

  Convertible Notes

The Company incurred approximately $10.0 million of debt issuance costs during the first quarter of 2016 relating to the issuance of $325 million aggregate principal amount of convertible senior unsecured notes that will mature on February 1, 2023 (the “Notes”), which were recorded as a reduction to the Notes on the consolidated balance sheet. The $10.0 million of debt issuance costs is being amortized and recognized as additional interest expense over the seven-year contractual term of the Notes on a straight-line basis, which approximates the effective interest rate method.

Total convertible notes payable consisted of the following at (in thousands):

	June 30, 2018			December 31,  2017
Principal amount of the Notes	$	325,000		$	325,000
Unamortized debt issuance costs		(6,525	)		(7,237	)
Total convertible notes payable	$	318,475		$	317,763

Interest expense incurred in connection with the Notes consisted of the following (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Coupon interest	$	3,047	$	3,047	$	6,094	$	6,094
Amortization of debt issuance costs		356		356		712		712
Total interest expense on the Notes	$	3,403	$	3,403	$	6,806	$	6,806