Revenues - Narrative (Details)	3 Months Ended
	Mar. 31, 2021
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Payment period after invoice date	15 days
Expected period to recognized unearned portion of revenue for freight services in transit	The Company expects to recognize the unearned portion of revenue for freight services in transit within one week of the reporting date.
Minimum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Average transit time to complete a shipment	2 days
Maximum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Average transit time to complete a shipment	8 days