Long-Term Debt (Tables)

3 Months Ended

Mar. 31, 2018

Long-Term Debt

Schedule Of Long-Term Debt

	March 31, 2018		December 31, 2017
	(In thousands)
Revolving credit facility, including swingline credit facility (weighted average combined interest rate of 3.4% and 3.2% as of March 31, 2018 and December 31, 2017, respectively)	$	117,168	$	122,461
1.00% Convertible Senior Notes due 2020, net of unamortized discount and capitalized debt issuance costs		254,797		251,973
5.125% Senior Notes due 2022, net of capitalized debt issuance costs		248,210		248,038
5.50% Senior Notes due 2025, net of capitalized debt issuance costs		295,411		295,249
Total long-term debt	$	915,586	$	917,721

Schedule of Interest Expense Related to Convertible Notes

	Three Months Ended
	March 31,
	2018		2017
	(In thousands)
Cash interest per contractual coupon rate	$	719	$	719
Amortization of note discount		2,638		2,503
Amortization of debt issuance costs		186		166
Total interest expense related to Convertible Notes	$	3,543	$	3,388

Schedule of Convertible Debt

	March 31, 2018		December 31, 2017
	(In thousands)
Principal balance	$	287,500	$	287,500
Unamortized discount and capitalized debt issuance costs		(32,703)		(35,527)
Net carrying amount of Convertible Notes	$	254,797	$	251,973