Long-term Debt (Tables)

9 Months Ended

Sep. 30, 2021

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

	September 30, 2021		December 31, 2020
Line of credit, maturing January 2025	$	25,000	$	—
Revenue equipment installment notes with finance companies, weighted average interest rate of 3.8% and 4.0% at September 30, 2021 and December 31, 2020, due in monthly installments with final maturities at various dates through March 2027, secured by related revenue equipment with a net book value of $309.9 million and $317.2 million at September 30, 2021 and December 31, 2020		304,029		315,163
Mortgage note payables, interest rates ranging from 4.17% to 6.99% at September 30, 2021 and December 31, 2020 due in monthly installments with final maturities at various dates through September 2031, secured by real estate with a net book value of $33.1 million and $31.8 million at September 30, 2021 and December 31, 2020		24,943		25,977
Other		255		11,245
		354,227		352,385
Less: Debt issuance costs		(369)		(314)
Less: Current maturities of long-term debt		(82,977)		(99,955)
	$	270,881	$	252,116