Debt (Tables)

12 Months Ended

Dec. 31, 2015

Debt Disclosure [Abstract]

Debt Outstanding Excluding Capital Lease

Debt outstanding, excluding capital lease obligations, consisted of the following:

	December 31, 2015						December 31, 2014
(In thousands)	Principal Balance		Unamortized Discount and Debt Issuance Costs		Net Carrying Amount		Principal Balance		Unamortized Discount and Debt Issuance Costs		Net Carrying Amount
1.25% Cash Convertible Senior Notes	$	345,000	$	61,771	$	283,229	$	345,000	$	73,765	$	271,235
Senior Secured Credit Facility    (long-term portion)		334,375		5,225		329,150		272,410		4,452		267,958
Senior Secured Credit Facility    (current portion)		12,500		479		12,021		28,125		892		27,233
Other debt		183		0		183		0		0		0
Total debt	$	692,058	$	67,475	$	624,583	$	645,535	$	79,109	$	566,426

Interest Expense

Interest expense consisted of the following:

	Year Ended December 31,
(In thousands)	2015		2014		2013
Interest expense	$	16,284	$	16,020	$	14,703
Amortization of discounts and debt issuance costs		13,679		13,277		9,451
Write off of unamortized deferred debt issuance costs		1,433		0		3,901
Total interest expense	$	31,396	$	29,297	$	28,055

Interest Expense Related to Notes

Interest expense related to the 1.25% Notes was comprised of the following:

	Year Ended December 31,
(In thousands)	2015		2014		2013
Coupon interest at 1.25%	$	4,312	$	4,312	$	2,312
Amortization of discounts and debt issuance costs		11,994		11,433		5,910
Total interest expense related to the 1.25% Notes	$	16,306	$	15,745	$	8,222

Summary of Future Payment Obligations under Notes and Senior Secured Credit Facilities

The following table summarizes our future payments under the 1.25% Notes and the Senior Secured Credit Facility as of December 31, 2015:

(In thousands)	Total		2016		2017		2018		2019		2020
1.25% Cash Convertible Senior Notes (1)	$	345,000	$	0	$	0	$	0	$	0	$	345,000
Term Loan		246,875		12,500		15,625		28,125		40,625		150,000
Revolving Facility		100,000		0		0		0		0		100,000
Other debt		183		183		0		0		0		0
Total debt	$	692,058	$	12,683	$	15,625	$	28,125	$	40,625	$	595,000

⁽¹⁾ Assumes no cash conversions of the 1.25% Notes prior to their maturity on July 1, 2020.