Long-Term Debt (Tables)

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Long-term Debt

Long-term debt consisted of the following:

	June 30, 2018		June 30, 2017		Dec. 31, 2017
	(Dollars in thousands)
Bank debt
Bank revolving loans	$	760,000	$	609,593	$	—
U.S. term loans	800,000		800,000		800,000
Canadian term loans	22,937		35,021		27,147
Other foreign bank revolving and term loans	34,914		45,357		76,798
Total bank debt	1,617,851		1,489,971		903,945
5% Senior Notes	—		280,000		280,000
5½% Senior Notes	300,000		300,000		300,000
4¾% Senior Notes	300,000		300,000		300,000
3¼% Senior Notes	759,460		742,105		780,325
Total debt - principal	2,977,311		3,112,076		2,564,270
Less unamortized debt issuance costs	14,639		18,314		16,979
Total debt	2,962,672		3,093,762		2,547,291
Less current portion	788,731		648,850		108,789
	$	2,173,941	$	2,444,912	$	2,438,502