Debt (Tables)

12 Months Ended

Dec. 31, 2018

Debt Disclosure [Abstract]

Debt

Debt comprised the following at December 31, 2018 and 2017:

(In thousands)	Maturity Dates	December 31, 2018		December 31, 2017
Unsecured private placement notes
3.95% (net of unamortized debt issuance cost of $360 and     $346 for 2018 and 2017, respectively)	2021-2027	$	99,640	$	99,654
3.86% (net of unamortized debt issuance cost of $347 and     $343 for 2018 and 2017, respectively)	2019-2025		99,653		99,657
4.86% (net of unamortized debt issuance cost of $186 and     $191 for 2018 and 2017, respectively)	2018-2023		46,243		55,523
5.88% (net of unamortized debt issuance cost of $85 and     $95 for 2018 and 2017, respectively)	2018-2022		22,772		28,476
5.69% (net of unamortized debt issuance cost of $0 and     $12 for 2018 and 2017, respectively)	2018		—		5,703
Debt of foreign subsidiaries
Unsecured bank debt, foreign currency	2019		7,772		1,786
Total debt		$	276,080	$	290,799
Less current maturities			37,058		22,500
Long-term debt		$	239,022	$	268,299

Schedule of Net Interest Expense

Net interest expense for the years ended December 31, 2018, 2017 and 2016, comprised the following:  

(In thousands)	2018		2017			2016
Interest expense	$	13,360	$	14,428		$	15,240
Interest income		(1,829)		(2,075	)		(1,247	)
		11,531		12,353			13,993
Capitalized interest		(760)		(909	)		(788	)
Interest expense, net	$	10,771	$	11,444		$	13,205