Goodwill and Other Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Amortization of intangible assets	$ 10,043	$ 10,888	$ 12,481
Minimum
Finite-lived intangible asset, useful life	1 year
Maximum
Finite-lived intangible asset, useful life	10 years
Weighted Average
Finite-lived intangible asset, useful life	8 years 4 months 24 days
Weighted Average | Customer Relationships
Finite-lived intangible asset, useful life	8 years 4 months 24 days
Weighted Average | Technology-Based Intangible Assets
Finite-lived intangible asset, useful life	4 years 9 months 18 days