Condensed Consolidated Statements of Changes in Equity (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Dividends declared per share of common stock	$ 0.01	$ 0.14	$ 0.15	$ 0.28
Dividends declared and paid per share of common stock	$ 0.01	$ 0.14	$ 0.15	$ 0.28
Repurchase of Class A common stock, shares				233,172
Class A Common Stock [Member]
Equity-based compensation, shares	103,167	81,171	799,674	321,506
Grant of exchangeability and redemption of limited partnership interests, shares	1,968,788	3,879,468	4,074,189	5,700,056
Issuance of Class A common stock (net of costs), shares	176,920	46,785	248,583	108,427
Issuance of Class A common stock and RSUs for acquisitions, shares	15,000	481,000	285,000	499,000
Repurchase of Class A common stock, shares	0	0	0	233,000
Class A Common Stock [Member] | Partnership Units [Member]
Redemption of FPUs	1,250	2,755	1,250	5,055
Class A Common Stock [Member] | Smith Mack [Member]
Issuance of Class A common stock and RSUs for acquisitions, shares	14,939	481,232	285,435	499,449