Long-term Debt (Tables)

3 Months Ended

Mar. 31, 2021

Debt Disclosure [Abstract]

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

	March 31, 2021		December 31, 2020
Line of credit, maturing January 2025	$	13,200	$	—
Revenue equipment installment notes with finance companies, weighted average interest rate of 4.0% and 4.0% at March 31, 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 $293.9 million and $317.2 million at March 31, 2021 and December 31, 2020		290,937		315,163
Mortgage note payables, interest rates ranging from 4.17% to 6.99% at March 31, 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 $31.4 million and $31.8 million at March 31, 2021 and December 31, 2020		25,637		25,977
Other		6,406		11,245
		336,180		352,385
Less: Debt issuance costs		(393)		(314)
Less: Current maturities of long-term debt		(87,682)		(99,955)
	$	248,105	$	252,116