Related Party Transactions (Details) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Related Party Transaction [Line Items]
Related party purchases	$ 0	$ 2,958,000	$ 4,942,000
Officer \| Transportation Brokerage and Logistics Services Vendor
Related Party Transaction [Line Items]
Related party purchases	$ 0	$ 2,900,000	$ 4,700,000

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration