Intangible Assets - Summary of Intangible Assets (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($)
Finite-Lived Intangible Assets [Line Items]
Total	$ 310,202
Weighted average useful life	11 years
Customer Contracts and Relationships
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross	$ 339,760
Accumulated Amortization	29,558
Total	$ 310,202
Customer Contracts and Relationships | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful Life	7 years
Customer Contracts and Relationships | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful Life	13 years