Financial Commitments (Tables)

12 Months Ended

Dec. 31, 2017

Financial Commitments [Abstract]

Long-Term Debt

	As of December 31,
(in thousands)	2017		2016
2017 Senior Notes	$	492,734	$	—
2017 Credit Facility		—		—
2010 Senior Notes		—		298,120
2014 Revolver		—		147,990
Term Loan		—		54,650
Convertible Notes		161,635		152,668
Equipment financing and mortgages		76,820		101,558
Other indebtedness		5,087		4,533
Total debt		736,276		759,519
Less: Current maturities		(30,748)		(85,890)
Long-term debt, net	$	705,528	$	673,629

Reconciliation Of Outstanding Debt Balance To Reported Debt Balance

	As of December 31, 2017						As of December 31, 2016
(in thousands)	Outstanding Long-Term Debt		Unamortized Discount and Issuance Costs		Long-Term Debt, as reported		Outstanding Long-Term Debt		Unamortized Discounts and Issuance Costs		Long-Term Debt, as reported
2017 Senior Notes	$	500,000	$	(7,266)	$	492,734	$	—	$	—	$	—
2010 Senior Notes		—		—		—		300,000		(1,880)		298,120
2014 Revolver		—		—		—		152,500		(4,510)		147,990
Term Loan		—		—		—		57,000		(2,350)		54,650
Convertible Notes		200,000		(38,365)		161,635		200,000		(47,332)		152,668

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

(in thousands)	December 31, 2017		December 31, 2016
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)		13,486		4,519
Net carrying amount	$	161,635	$	152,668
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)
2018	$	30,748
2019		12,194
2020		5,321
2021		218,868
2022		7,457
Thereafter		507,319
		781,907
Less: Unamortized discount and issuance costs		(45,631)
Total	$	736,276

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

	For the year ended December 31,
(in thousands)	2017		2016		2015
Cash interest expense:
Interest on 2017 Senior Notes	$	23,967	$	—	$	—
Interest on 2017 Credit Facility		5,517		—		—
Interest on 2010 Senior Notes		6,926		22,875		22,875
Interest on 2014 Credit Facility		4,455		19,201		14,368
Interest on Convertible Notes		5,750		3,115		—
Other interest		3,261		3,623		5,805
Cash portion of loss on extinguishment		1,913		—		—
Total cash interest expense		51,789		48,814		43,048
Non-cash interest expense(a):
Amortization of debt issuance costs on 2017 Senior Notes		516		—		—
Amortization of debt issuance costs on 2017 Credit Facility		962		—		—
Amortization of discount and debt issuance costs on 2010 Senior Notes		308		1,002		979
Amortization of debt issuance costs on 2014 Credit Facility		1,703		5,447		1,116
Amortization of discount and debt issuance costs on Convertible Notes		8,967		4,519		—
Non-cash portion of loss on extinguishment		5,139		—		—
Total non-cash interest expense		17,595		10,968		2,095
Total interest expense	$	69,384	$	59,782	$	45,143

(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 year ended December 31, 2017.

Future Minimum Rent Payments under Non-Cancelable Operating Leases

Year (in thousands)
2018	$	18,420
2019		12,424
2020		8,980
2021		6,240
2022		5,524
Thereafter		14,898
		66,486
Less: Sublease rental agreements		(2,291)
Total	$	64,195