Interest Expense (Tables)

3 Months Ended

Mar. 31, 2018

Interest Expense [Abstract]

Interest Expense Schedule

The following table presents the components of the Company’s interest expense:

	Three Months Ended March 31,
	2018		2017
	(In thousands)
Contractual interest on Subordinated Convertible Debentures	$	14,948	$	10,156
Contractual interest on Senior Notes	21,766		15,235
Amortization of debt discount on Subordinated Convertible Debentures	3,161		2,911
Amortization of debt issuance costs and other interest expense	913		721
Total interest expense	$	40,788	$	29,023