Long-Term Debt (Tables)

9 Months Ended

Sep. 30, 2018

Long-Term Debt

Schedule Of Long-Term Debt

	September 30, 2018		December 31, 2017
	(In thousands)
Revolving credit facility, including swingline credit facility (weighted average combined interest rate of 3.0% and 3.2% as of September 30, 2018 and December 31, 2017, respectively)	$	30,930	$	122,461
1.00% Convertible Senior Notes due 2020, net of unamortized discount and capitalized debt issuance costs		260,563		251,973
5.125% Senior Notes due 2022, net of capitalized debt issuance costs		248,562		248,038
5.50% Senior Notes due 2025, net of capitalized debt issuance costs		295,735		295,249
Total long-term debt	$	835,790	$	917,721

Schedule of Interest Expense Related to Convertible Notes

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
	(In thousands)				(In thousands)
Cash interest per contractual coupon rate	$	719	$	719	$	2,157	$	2,157
Amortization of note discount		2,708		2,569		8,018		7,608
Amortization of debt issuance costs		196		176		572		513
Total interest expense related to Convertible Notes	$	3,623	$	3,464	$	10,747	$	10,278

Schedule of Convertible Debt

	September 30, 2018		December 31, 2017
	(In thousands)
Principal balance	$	287,500	$	287,500
Unamortized discount and capitalized debt issuance costs		(26,937)		(35,527)
Net carrying amount of Convertible Notes	$	260,563	$	251,973