Description of Business and Summary of Significant Accounting Policies Deferred Revenue Rollforward (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Revenue Recognition and Deferred Revenue [Abstract]
Deferred revenue included in accounts receivables	$ 6,900	$ 6,400
Change in Contract Liabilities
Balance, beginning of period	37,253	44,660
Revenue recognized from beginning balance	(19,040)	(31,507)
Additions from business acquisitions	0	769
Additions, net of revenue recognized and currency translation	18,134	23,331
Balance, end of period	$ 36,347	$ 37,253