Share-Based Compensation - Unrecognized Share-based Compensation Expense (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021 USD ($)
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total unrecognized share-based compensation expense	$ 12,528
Weighted Average Amortization Period	3 years 3 days
Time-Based Restricted Stock Units
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Unrecognized expense, restricted stock	$ 7,571
Weighted Average Amortization Period	3 years 2 months 4 days
Stock Options
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Unrecognized expense, stock options	$ 2,467
Weighted Average Amortization Period	3 years 3 months
Performance-Based Restricted Stock Units
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Unrecognized expense, restricted stock	$ 2,490
Weighted Average Amortization Period	2 years 3 months