Common Stock (Details) - shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
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)	29,852,958		29,421,131
Common stock, shares outstanding (in shares)	29,852,958		29,421,131
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)	307,529	225,401
Common stock repurchased (in shares)	75,695	59,261
Class B Common Stock
Capital Unit [Line Items]
Common stock, shares issued (in shares)	35,060,687		35,260,680
Common stock, shares outstanding (in shares)	35,060,687		35,260,680
EEH Units and Class B Common Stock converted to Class A Common Stock (in shares)	199,993