Debt (Tables)

12 Months Ended

Dec. 31, 2019

Debt Disclosure [Abstract]

Schedule of Long-term Debt

Long-term debt consists of the following at December 31:

(in thousands)	2019			2018
Variable rate term loans1	$	397,500		$	247,500
Fixed rate term loans2		296,000			296,000
7 1/2% Senior notes		—			150,000
Revenue bonds3		65,735			65,735
Medium-term notes4		3,000			3,000
Long-term principal		762,235			762,235
Interest rate swaps		—			(183	)
Debt issuance costs		(2,086	)		(2,143	)
Unamortized discounts		(3,680	)		(4,545	)
Total long-term debt		756,469			755,364
Less current portion of long-term debt		(45,974	)		(39,973	)
Long-term debt	$	710,495		$	715,391

¹ Variable rate term loans are at rates of one or three-month LIBOR plus a spread between 1.85% and 2.15% and mature between 2020 and 2029. At December 31, 2019, the one and three-month LIBOR rates were 1.69% and 2.10%, respectively. We have entered into interest rate swaps for these variable rate term loans to fix the interest rate. See Note 15: Derivative Instruments for additional information.

² Fixed rate term loans are at rates between 3.70% and 4.64% and mature between 2022 and 2025.

³ Revenue bonds have a fixed rate of 2.75% and mature in 2024.

⁴ Medium term notes have a fixed rate of 8.75% and mature in 2022.

Schedule of Maturities of Long-term Debt

Scheduled principal payments due on long-term debt at December 31, 2019 are as follows:

(in thousands)
2020	$	46,000
2021		40,000
2022		43,000
2023		40,000
2024		175,735
Thereafter		417,500
Total	$	762,235