Financial Commitments (Tables)

9 Months Ended

Sep. 30, 2018

Financial Commitments [Abstract]

Long-term Debt

	As of September 30,		As of December 31,
(in thousands)	2018		2017
2017 Senior Notes	$	493,319	$	492,734
Convertible Notes		168,932		161,635
2017 Credit Facility		78,000		—
Equipment financing and mortgages		56,227		76,820
Other indebtedness		4,846		5,087
Total debt		801,324		736,276
Less: Current maturities		20,601		30,748
Long-term debt, net	$	780,723	$	705,528

Reconciliation Of Outstanding Debt Balance To Reported Debt Balance

	As of September 30, 2018						As of December 31, 2017
(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	$	(6,681)	$	493,319	$	500,000	$	(7,266)	$	492,734
Convertible Notes		200,000		(31,068)		168,932		200,000		(38,365)		161,635

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)	2018		2017		2018		2017
Cash interest expense:
Interest on 2017 Senior Notes	$	8,594	$	8,593	$	25,781	$	15,373
Interest on 2017 Credit Facility		2,596		2,035		6,300		3,526
Interest on Convertible Notes		1,437		1,438		4,312		4,313
Interest on 2010 Senior Notes		—		—		—		6,926
Interest on 2014 Credit Facility		—		—		—		4,455
Other interest		736		802		2,119		2,495
Cash portion of loss on extinguishment		—		—		—		1,913
Total cash interest expense		13,363		12,868		38,512		39,001
Non-cash interest expense:(a)
Amortization of discount and debt issuance costs on Convertible Notes		2,490		2,268		7,298		6,646
Amortization of debt issuance costs on 2017 Credit Facility		360		322		1,080		603
Amortization of debt issuance costs on 2017 Senior Notes		198		185		584		326
Amortization of debt issuance costs on 2014 Credit Facility		—		—		—		1,703
Amortization of discount and debt issuance costs on 2010 Senior Notes		—		—		—		308
Non-cash portion of loss on extinguishment		—		—		—		5,139
Total non-cash interest expense		3,048		2,775		8,962		14,725
Total interest expense	$	16,411	$	15,643	$	47,474	$	53,726

(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 were7.13% and 9.39%, respectively, for the nine months ended September 30, 2018.