Financial Commitments (Tables)

12 Months Ended

Dec. 31, 2019

Financial Commitments [Abstract]

Long-Term Debt

	As of December 31,
(in thousands)	2019		2018
2017 Senior Notes	$	494,365	$	493,521
2017 Credit Facility		114,000		41,000
Convertible Notes		182,292		171,481
Equipment financing and mortgages		39,159		50,904
Other indebtedness		4,660		4,598
Total debt		834,476		761,504
Less: Current maturities		124,054		16,767
Long-term debt, net	$	710,422	$	744,737

Reconciliation Of Outstanding Debt Balance To Reported Debt Balance

	As of December 31, 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	$	(5,635)	$	494,365	$	500,000	$	(6,479)	$	493,521
Convertible Notes		200,000		(17,708)		182,292		200,000		(28,519)		171,481

Summary Of Information Related To The Liability And Equity Components Of The Convertible Notes

(in thousands)	December 31, 2019		December 31, 2018
Liability component:
Principal	$	200,000	$	200,000
Conversion feature		(46,800)		(46,800)
Allocated debt issuance costs		(5,051)		(5,051)
Amortization of discount and debt issuance costs (non-cash interest expense)		34,143		23,332
Net carrying amount	$	182,292	$	171,481
Equity component:
Conversion feature	$	46,800	$	46,800
Allocated debt issuance costs		(1,543)		(1,543)
Deferred taxes		(18,815)		(18,815)
Net carrying amount	$	26,442	$	26,442

Principal Payments of Long-Term Debt

Year (in thousands)
2020	$	124,054
2021		218,967
2022		7,546
2023		7,164
2024		88
Thereafter		500,000
		857,819
Less: Unamortized discount and issuance costs		23,343
Total	$	834,476

Summary Of Interest Expense As Reported In The Consolidated Statements of Operations

	For the year ended December 31,
(in thousands)	2019		2018		2017
Cash interest expense:
Interest on 2017 Senior Notes	$	34,375	$	34,375	$	23,967
Interest on 2017 Credit Facility		11,990		8,575		5,517
Interest on Convertible Notes		5,750		5,750		5,750
Interest on 2010 Senior Notes		—		—		6,926
Interest on 2014 Credit Facility		—		—		4,455
Other interest		2,172		2,747		3,261
Cash portion of loss on extinguishment		—		—		1,913
Total cash interest expense		54,287		51,447		51,789
Non-cash interest expense(a):
Amortization of discount and debt issuance costs on Convertible Notes		10,811		9,846		8,967
Amortization of debt issuance costs on 2017 Credit Facility		1,552		1,439		962
Amortization of debt issuance costs on 2017 Senior Notes		844		787		516
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		13,207		12,072		17,595
Total interest expense	$	67,494	$	63,519	$	69,384

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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 year ended December 31, 2019.