Transactions with Affiliates (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($) truck	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)
Transactions with Affiliates [Abstract]
Billings to affiliates	$ 476,472	$ 143,674	$ 795,415	$ 479,647
Asset acquisition			0	9,137
Affiliated entities
Transactions with Affiliates [Abstract]
Affiliate billings to us	0	15	12	32
Billings to affiliates	5	1	6	2
Rentals paid to affiliate	$ 143	$ 122	$ 317	$ 244
Number of pickup tracks purchased | truck	8
Asset acquisition	$ 400