Goodwill and Intangible Assets - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Goodwill And Intangible Assets [Line Items]
Impairment of goodwill	$ 0	$ 0
Impairment of intangible assets related to certain customer relationship	0	6,000,000
Expected amortization expense, year 2017	2,400,000
Expected amortization expense, year 2018	2,300,000
Expected amortization expense, year 2019	2,300,000
Expected amortization expense, year 2020	2,300,000
Expected amortization expense, year 2021	$ 2,300,000
Intangible assets, weighted average useful life	8 years 8 months 12 days
Customer Relationships
Goodwill And Intangible Assets [Line Items]
Fair value of Intangible assets		$ 0