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Commitments and Contingencies (Details) - USD ($)	Feb. 28, 2017	Sep. 30, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Loss contingency accrual		$ 0	$ 0
UniRush, LLC
Business Acquisition [Line Items]
Contingent consideration, earn-out payable	$ 20,000,000
Contingent consideration, earn-out period	5 years

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- Definition

Business Combination, Contingent Consideration, Earn-out Payable

+ References

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- Definition

Business Combination, Contingent Consideration, Earn-out Period

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- Definition

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.

+ References

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- Definition

Amount of loss contingency liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14326-108349

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