Redeemable Noncontrolling Interests (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balance at beginning			$ 12,244
Share of profit or loss attributable to redeemable noncontrolling interests	$ 1,403	$ 2,683	5,169	$ 7,560
Dividends paid	1,285	143	1,828	2,052
Balance at end	12,108		12,108
Payments to Acquire Additional Interest in Subsidiaries			13,100
Redeemable Noncontrolling Interest
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balance at beginning			99,043	81,806
Acquired through acquisitions during 2019				23,594
Impact of foreign exchange translation			16,268	923
Share of profit or loss attributable to redeemable noncontrolling interests			3,480	5,397
Redemption value adjustment for the current period			(4,964)	(1,593)
Dividends paid			(1,626)	(432)
Measurement period adjustments			(1,426)	5,392
Exercises of redeemable noncontrolling interests			10,770	542
Balance at end	$ 100,005	$ 114,545	$ 100,005	$ 114,545