Financial Commitments (Tables)

6 Months Ended

Jun. 30, 2018

Financial Commitments [Abstract]

Long-term Debt

	As of June 30,		As of December 31,
(in thousands)	2018		2017
2017 Senior Notes	$	493,121	$	492,734
Convertible Notes		166,442		161,635
2017 Credit Facility		92,000		—
Equipment financing and mortgages		64,434		76,820
Other indebtedness		6,617		5,087
Total debt		822,614		736,276
Less: Current maturities		28,105		30,748
Long-term debt, net	$	794,509	$	705,528

Reconciliation Of Outstanding Debt Balance To Reported Debt Balance

	As of June 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	$	(6,879)	$	493,121	$	500,000	$	(7,266)	$	492,734
Convertible Notes		200,000		(33,558)		166,442		200,000		(38,365)		161,635

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

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands)	2018		2017		2018		2017
Cash interest expense:
Interest on 2017 Senior Notes	$	8,594	$	6,780	$	17,187	$	6,780
Interest on 2017 Credit Facility		2,354		1,491		3,704		1,491
Interest on Convertible Notes		1,437		1,437		2,875		2,875
Interest on 2010 Senior Notes		—		1,207		—		6,926
Interest on 2014 Credit Facility		—		746		—		4,455
Other interest		626		831		1,383		1,693
Cash portion of loss on extinguishment		—		1,913		—		1,913
Total cash interest expense		13,011		14,405		25,149		26,133
Non-cash interest expense:(a)
Amortization of discount and debt issuance costs on Convertible Notes		2,432		2,214		4,808		4,378
Amortization of debt issuance costs on 2017 Credit Facility		360		281		720		281
Amortization of debt issuance costs on 2017 Senior Notes		195		141		386		141
Amortization of debt issuance costs on 2014 Credit Facility		—		285		—		1,703
Amortization of discount and debt issuance costs on 2010 Senior Notes		—		54		—		308
Non-cash portion of loss on extinguishment		—		5,139		—		5,139
Total non-cash interest expense		2,987		8,114		5,914		11,950
Total interest expense	$	15,998	$	22,519	$	31,063	$	38,083

(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 six months ended June 30, 2018.