Financial Commitments (Tables)

9 Months Ended

Sep. 30, 2019

Financial Commitments [Abstract]

Long-term Debt

	As of September 30,		As of December 31,
(in thousands)	2019		2018
2017 Senior Notes	$	494,148	$	493,521
2017 Credit Facility		117,000		41,000
Convertible Notes		179,494		171,481
Equipment financing and mortgages		40,475		50,904
Other indebtedness		5,127		4,598
Total debt		836,244		761,504
Less: Current maturities		10,862		16,767
Long-term debt, net	$	825,382	$	744,737

Reconciliation of Outstanding Debt Balance to Reported Debt Balance

	As of September 30, 2019						As of December 31, 2018
(in thousands)	Outstanding Long-Term Debt		Unamortized Discount and Issuance Costs		Long-Term Debt, as reported		Outstanding Long-Term Debt		Unamortized Discount and Issuance Costs		Long-Term Debt, as reported
2017 Senior Notes	$	500,000	$	(5,852)	$	494,148	$	500,000	$	(6,479)	$	493,521
Convertible Notes		200,000		(20,506)		179,494		200,000		(28,519)		171,481

Summary of Interest Expense as Reported in the Condensed Consolidated Statements of Income

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(in thousands)	2019		2018		2019		2018
Cash interest expense:
Interest on 2017 Senior Notes	$	8,594	$	8,594	$	25,781	$	25,781
Interest on 2017 Credit Facility		3,385		2,596		9,712		6,300
Interest on Convertible Notes		1,438		1,437		4,313		4,312
Other interest		540		736		1,656		2,119
Total cash interest expense		13,957		13,363		41,462		38,512
Non-cash interest expense:(a)
Amortization of discount and debt issuance costs on Convertible Notes		2,734		2,490		8,013		7,298
Amortization of debt issuance costs on 2017 Credit Facility		401		360		1,150		1,080
Amortization of debt issuance costs on 2017 Senior Notes		213		198		627		584
Total non-cash interest expense		3,348		3,048		9,790		8,962
Total interest expense	$	17,305	$	16,411	$	51,252	$	47,474

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(a)The combination of cash and non-cash interest expense produces effective interest rates that are higher than contractual rates. Accordingly, the effective interest rates for the 2017 Senior Notes and the Convertible Notes were 7.13% and 9.39%, respectively, for the nine months ended September 30, 2019.