Financial Commitments (Tables)

3 Months Ended

Mar. 31, 2018

Financial Commitments [Abstract]

Long-term Debt

	As of March 31,		As of December 31,
(in thousands)	2018		2017
2017 Senior Notes	$	492,926	$	492,734
Convertible Notes		164,010		161,635
2017 Credit Facility		86,500		—
Equipment financing and mortgages		70,629		76,820
Other indebtedness		3,219		5,087
Total debt		817,284		736,276
Less: Current maturities		27,165		30,748
Long-term debt, net	$	790,119	$	705,528

Reconciliation Of Outstanding Debt Balance To Reported Debt Balance

	As of March 31, 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	$	(7,074)	$	492,926	$	500,000	$	(7,266)	$	492,734
Convertible Notes		200,000		(35,990)		164,010		200,000		(38,365)		161,635

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

	Three Months Ended
	March 31,
(in thousands)	2018		2017
Cash interest expense:
Interest on 2017 Senior Notes	$	8,594	$	—
Interest on Convertible Notes		1,438		1,438
Interest on 2017 Credit Facility		1,349		—
Interest on 2010 Senior Notes		—		5,719
Interest on 2014 Credit Facility		—		3,709
Other interest		757		862
Total cash interest expense		12,138		11,728
Non-cash interest expense:(a)
Amortization of discount and debt issuance costs on Convertible Notes		2,376		2,164
Amortization of debt issuance costs on 2017 Credit Facility		360		—
Amortization of debt issuance costs on 2017 Senior Notes		191		—
Amortization of debt issuance costs on 2014 Credit Facility		—		1,418
Amortization of discount and debt issuance costs on 2010 Senior Notes		—		254
Total non-cash interest expense		2,927		3,836
Total interest expense	$	15,065	$	15,564

(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 three months ended March 31, 2018.