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Share-Based Payments - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Apr. 16, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized stock-based compensation expense	$ 16,815	$ 15,897	$ 13,588	$ 16,800	$ 15,900	$ 13,600
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense	100			100
RSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense	$ 34,500			$ 34,500
LTIP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)							7,000,000
Common stock, shares delivered (in shares)				508,968	433,585	378,855
LTIP | RSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock units vested (in shares)				877,262	730,980	741,210
Adjustments to additional paid in capital, income tax deficiency from share-based compensation				$ 6,500	$ 5,000	$ 4,800

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