Redeemable Noncontrolling Interests (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balance at beginning	$ 12,244
Share of profit or loss attributable to redeemable noncontrolling interests	2,604	$ 2,385
Dividends paid	39
Balance at end	12,824
Redeemable Noncontrolling Interest
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balance at beginning	99,043	81,806
Acquired through acquisitions during 2019		26,224
Impact of foreign exchange translation	19,255	(190)
Share of profit or loss attributable to redeemable noncontrolling interests	1,987	1,541
Redemption value adjustment for the current period	(5,806)	(370)
Dividends paid		5,700
Measurement period adjustments	(1,426)
Exercises of redeemable noncontrolling interests	10,340
Balance at end	$ 102,713	$ 114,711