Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Equity Incentive Plan Class A common stock	Members' Capital	Additional Paid-In Capital	Accumulated Other Comprehensive Income	Retained Earnings	Non-Controlling Interests	Class A common stock	Class B common stock	Class C common stock	Class D common stock	Total
Increase (Decrease) in Stockholders' Equity
Financial Designation, Predecessor and Successor [Fixed List]											Predecessor
Members' capital beginning of period at Dec. 31, 2016		$ 1,040,911		$ (16,152)							$ 1,024,759
Comprehensive income:
Adjustment to Class C Shares and Class P© shares in mezzanine capital		(2,109)									(2,109)
Capital distributions		(152,000)									(152,000)
Net income		83,648									83,648
Foreign currency translation adjustments				2,885							2,885
Total comprehensive income		83,648		2,885							86,533
Capital contributions		29,285									29,285
Members' capital end of period at Dec. 31, 2017		999,735		(13,267)							$ 986,468
Increase (Decrease) in Stockholders' Equity
Financial Designation, Predecessor and Successor [Fixed List]											Predecessor
Comprehensive income:
Adjustment to Class C Shares and Class P© shares in mezzanine capital		456									$ 456
Capital distributions		(139,350)									(139,350)
Net income		130,160									130,160
Foreign currency translation adjustments				(3,064)							(3,064)
Vesting of contingent consideration		150,495									150,495
Total comprehensive income		130,160		(3,064)							127,096
Members' capital end of period at Sep. 30, 2018		1,141,496		(16,331)							$ 1,125,165
Increase (Decrease) in Stockholders' Equity
Financial Designation, Predecessor and Successor [Fixed List]											Successor
Members' capital beginning of period at Dec. 31, 2017		999,735		(13,267)							$ 986,468
Members' capital end of period at Dec. 31, 2018		4,573,200		(866)							4,572,334
Equity at end of period at Dec. 31, 2018				(866)							$ 4,572,334
Increase (Decrease) in Stockholders' Equity
Financial Designation, Predecessor and Successor [Fixed List]											Successor
Members' capital beginning of period at Sep. 30, 2018		1,141,496		(16,331)							$ 1,125,165
Comprehensive income:
Net income											29,307
Members' capital end of period at Dec. 31, 2018		4,573,200		(866)							4,572,334
Equity at end of period at Dec. 31, 2018				(866)							4,572,334
Members' capital beginning of period at Oct. 01, 2018		4,562,154									4,562,154
Comprehensive income:
Adjustment to Class C Shares and Class P© shares in mezzanine capital		(1,333)									(1,333)
Capital distributions		(36,000)									(36,000)
Net income		29,307									29,307
Foreign currency translation adjustments				(866)							(866)
Total comprehensive income		29,307		(866)							28,441
Conversion of certain cash-settled PRSUs to equity-settled PRSUs		19,072									19,072
Members' capital end of period at Dec. 31, 2018		4,573,200		(866)							4,572,334
Equity at end of period at Dec. 31, 2018				(866)							$ 4,572,334
Increase (Decrease) in Stockholders' Equity
Financial Designation, Predecessor and Successor [Fixed List]											Successor
Comprehensive income:
Adjustment to Class C Shares and Class P© shares in mezzanine capital		(2,369)									$ (2,369)
Capital distributions		(20,000)									(20,000)
Stock-based compensation		4,674									4,674
Net income		42,352									42,352
Foreign currency translation adjustments				988							988
Members' capital end of period at Mar. 31, 2019		4,597,857
Equity at end of period at Mar. 31, 2019				122							$ 4,597,979
Increase (Decrease) in Stockholders' Equity
Financial Designation, Predecessor and Successor [Fixed List]											Successor
Members' capital beginning of period at Dec. 31, 2018		4,573,200		(866)							$ 4,572,334
Equity at beginning of period at Dec. 31, 2018				(866)							4,572,334
Comprehensive income:
Stock-based compensation expense under the PRSU Plan											19,100
Net income											173,024
Total comprehensive income											85,210
Equity at end of period at Dec. 31, 2019			$ 3,329,386	1,366	$ 47,833	$ 1,214,157	$ 1	$ 1		$ 1	$ 4,592,745
Equity at end of period (in shares) at Dec. 31, 2019							66,408,328	96,933,192	8,328,983	50,853,172
Increase (Decrease) in Stockholders' Equity
Financial Designation, Predecessor and Successor [Fixed List]											Successor
Members' capital beginning of period at Mar. 31, 2019		4,597,857
Equity at beginning of period at Mar. 31, 2019				122							$ 4,597,979
Comprehensive income:
Capital distributions		(100,000)									(100,000)
Effect of the reorganization transactions		$ (4,497,857)	4,521,132								23,275
Issuance of common stock			(18,492)					$ 1		$ 1	(18,490)
Issuance of common stock (in shares)	301,478						46,000,000	96,933,192	10,006,269	69,282,736
Activities related to the follow-on offering and other exchanges of LLC Interests, net of offering costs and cancellations							$ 1				1
Activities related to the follow-on offering and other exchanges of LLC Interests, net of offering costs and cancellations (in shares)							20,106,850		(1,677,286)	(18,429,564)
Tax receivable agreement liability and deferred taxes arising from the reorganization transactions, IPO and follow-on offering and other LLC Interest ownership changes			(4,382)								(4,382)
Allocation of equity to non-controlling interests			(1,607,529)			1,607,529
Adjustments to non-controlling interests			402,424	(197)		(402,227)
Distributions to non-controlling interests						(38,346)					(38,346)
Dividends ($0.24 per share)					(35,936)						(35,936)
Stock-based compensation expense under the PRSU Plan			20,718								20,718
Stock-based compensation expense under the Option Plan			24,432								24,432
Payroll taxes paid for stock-based compensation exercises			(8,917)								(8,917)
Net income					83,769	46,903					130,672
Foreign currency translation adjustments				1,441		298					1,739
Equity at end of period at Dec. 31, 2019			$ 3,329,386	$ 1,366	$ 47,833	$ 1,214,157	$ 1	$ 1		$ 1	$ 4,592,745
Equity at end of period (in shares) at Dec. 31, 2019							66,408,328	96,933,192	8,328,983	50,853,172