Debt (Tables)

12 Months Ended

Dec. 31, 2021

Debt Disclosure [Abstract]

Debt

Debt comprised the following at December 31, 2021 and 2020:

(In thousands)	Maturity Dates	December 31, 2021		December 31, 2020
Unsecured private placement notes
3.95% (net of unamortized debt issuance cost of $230 and     $273 for 2021 and 2020, respectively)	2022-2027	$	85,485	$	99,727
3.86% (net of unamortized debt issuance cost of 181 and     $236 for 2021 and 2020, respectively)	2022-2025		56,962		71,193
4.86% (net of unamortized debt issuance cost of $69 and     $108 for 2021 and 2020 respectively)	2022-2023		18,502		27,749
2.30% (net of unamortized debt issuance cost of $100 and     $0 for 2021 and 2020, respectively)	2024-2028		49,900		—
2.37% (net of unamortized debt issuance cost of $108 and     $0 for 2021 and 2020, respectively)	2024-2028		49,892		—
2.73% (net of unamortized debt issuance cost of $22 and     $0 for 2021 and 2020, respectively)	2025-2031		99,978		—
Debt of foreign subsidiaries
Unsecured bank debt, foreign currency	2022		2,861		—
Total debt		$	363,580	$	198,669
Less current maturities			40,718		37,857
Long-term debt		$	322,862	$	160,812

Schedule of Net Interest Expense

Net interest expense for the years ended December 31, 2021, 2020 and 2019, comprised the following:  

(In thousands)	2021			2020			2019
Interest expense	$	10,145		$	9,859		$	12,744
Interest income		(1,255	)		(2,171	)		(5,717	)
		8,890			7,688			7,027
Capitalized interest		(3,137	)		(2,279	)		(1,095	)
Interest expense, net	$	5,753		$	5,409		$	5,932