Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2020

Debt Disclosure [Abstract]

Schedule of Long-Term Debt

Long-term debt at December 31, 2020 and 2019 consisted of the following:

(in thousands)	December 31, 2020			December 31, 2019
Current portion of long-term debt:
Current portion of 5-year term loan facility expires 2022	$	40,000		$	40,000
Current portion of 5-year term loan credit agreement expires 2023		30,000			15,000
Total current portion of long-term debt		70,000			55,000
Long-term debt:
Note agreements:
4.200% Senior Notes, semi-annual interest payments, balloon due 2024		499,416			499,259
4.500% Senior Notes, semi-annual interest payments, balloon due 2029		349,540			349,484
2.375% Senior Note due 2031, semi-annual interest payments, balloon due 2031		699,252			—
Total notes		1,548,208			848,743
Credit agreements:
5-year term loan facility, periodic interest and principal payments, LIBOR plus up to 1.750%, expires June 28, 2022		250,000			290,000
5-year revolving loan facility, periodic interest payments, currently LIBOR plus up to 1.500%, plus commitment fees up to 0.250%, expires June 28, 2022		—			100,000
5-year term loan facility, periodic interest and principal payments, LIBOR plus up to 1.750%, expires December 21, 2023		240,000			270,000
Total credit agreements		490,000			660,000
Debt issuance costs (contra)		(12,302	)		(8,400	)
Total long-term debt less unamortized discount and debt issuance costs		2,025,906			1,500,343
Current portion of long-term debt		70,000			55,000
Total debt	$	2,095,906		$	1,555,343