Common Stock (Details) - shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Member Units | Bold Contribution Agreement
Capital Unit [Line Items]
Stock conversion (in shares)	1
Class A Common Stock
Capital Unit [Line Items]
Common stock, shares issued (in shares)	44,104,541		30,343,421
Common stock, shares outstanding (in shares)	44,104,541		30,343,421
Class A Common Stock | Bold Contribution Agreement
Capital Unit [Line Items]
Stock conversion (in shares)	1
Class A Common Stock | 2014 Plan
Capital Unit [Line Items]
Common shares issued during period under stock plan (in shares)	721,259	307,529
Common stock repurchased (in shares)	257,764	75,695
Class B Common Stock
Capital Unit [Line Items]
Common stock, shares issued (in shares)	34,431,340		35,009,371
Common stock, shares outstanding (in shares)	34,431,340		35,009,371
EEH units and class B common stock converted to class A common stock (in shares)	578,031	199,993