Summary of Significant Accounting Policies - Intangible Assets (Details)	12 Months Ended
	Dec. 31, 2016
Minimum | Trade Names
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	1 year
Minimum | Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	5 years
Minimum | Technology
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	3 years
Maximum | Trade Names
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	15 years
Maximum | Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	10 years
Maximum | Technology
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	10 years