Repurchase of Non-Controlling Interests - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended			11 Months Ended	12 Months Ended
	Nov. 30, 2020	Oct. 31, 2020	Sep. 30, 2020	Nov. 19, 2020	Dec. 31, 2020
Noncontrolling Interest [Line Items]
Purchase of noncontrolling interest in MLSC				$ 166,427	$ 166,400
Conversion of LLC units to common stock (in shares)	1,000
Non-Controlling Interest
Noncontrolling Interest [Line Items]
Purchase of noncontrolling interest in MLSC				4,812	4,800
Member's Equity
Noncontrolling Interest [Line Items]
Purchase of noncontrolling interest in MLSC				$ 161,615	$ 161,600
Topco LLC And MLSH 1 | Investors
Noncontrolling Interest [Line Items]
Value of shares purchased in noncontrolling interest			$ 120,000
Topco LLC
Noncontrolling Interest [Line Items]
Payments for repurchase of shares		$ 120,000
Common units outstanding (in shares)				253,916,941
Investors
Noncontrolling Interest [Line Items]
Preferred units outstanding (in shares)		16,736
Common units outstanding (in shares)		7,112,794
Value of stock converted in period		$ 46,600
Preferred Class B | Topco LLC And MLSH 1 | Investors
Noncontrolling Interest [Line Items]
Shares purchased in noncontrolling interest (in shares)			43,264
Common Units | Topco LLC And MLSH 1 | Investors
Noncontrolling Interest [Line Items]
Shares purchased in noncontrolling interest (in shares)			18,387,206