Business Acquisitions - Narratives (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition
Payments for acquisitions, net of cash acquired									$ 73,906	$ 0	$ 19,121
Business Combination, Contingent Consideration, Liability	$ 1,056								1,056
Business Acquisition, Goodwill, Expected Tax Deductible Amount	34,999								34,999
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets	6,221								6,221
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	2,567								2,567
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	29								29
Goodwill	106,056				$ 71,057				106,056	71,057	71,057
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	(2,710)								(2,710)
Net Income (Loss) Attributable to Parent	$ 10,062	$ 2,722	$ 11,943	$ 11,419	$ 17,564	$ 10,211	$ 7,209	$ 11,548	36,146	$ 46,532	$ 14,448
Developed technology and other intangible assets
Business Acquisition
Finite-lived Intangible Assets Acquired									$ 1,800
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life									5 years