Shareholders’ Equity and Stock Incentive Plans - Additional Information (Details) - USD ($)				1 Months Ended	12 Months Ended
	Dec. 22, 2020	Jan. 01, 2020	Aug. 27, 2015	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Aug. 03, 2021	Mar. 12, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock repurchase, authorized								$ 50,000,000	$ 25,000,000
Shares repurchased (in shares)				226,485
Common stock price per share (USD per share)				$ 46.87	$ 46.87
Repurchases of common stock					$ 10,616,000	$ 950,000
Remaining authorized repurchase amount				$ 39,400,000	39,400,000
Proceeds from exercise of stock options					98,000	0	$ 0
Lyle A. Berman
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares repurchased (in shares)	50,000
Common stock price per share (USD per share)	$ 19.00
Accumulated Deficit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Repurchases of common stock				10,600,000	10,613,000	950,000
Accumulated Deficit | Lyle A. Berman
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Repurchases of common stock	$ 1,000,000
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Intrinsic value of stock options exercised					$ 26,100,000	$ 1,300,000	$ 1,600,000
Dividend rate variable					0.00%
Stock options, unrecognized share-based compensation expense				0	$ 0
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, unrecognized share-based compensation expense				9,200,000	$ 9,200,000
Weighted-average period for recognition					1 year 10 months 24 days
Performance Stock Units (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, unrecognized share-based compensation expense				$ 8,200,000	$ 8,200,000
Weighted-average period for recognition					1 year 10 months 24 days
Performance Stock Units (PSUs) | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period					1 year
Vesting period					2 years
Performance Stock Units (PSUs) | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period					2 years
Vesting period					1 year
2015 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration term					10 years
Number of shares authorized (in shares)			2,250,000
Number of shares annual increase (in shares)		1,126,361	1,800,000
Plan shares annual increase, percentage			4.00%
Maximum number of shares authorized per one participant (in shares)			2,000,000	2,199,632	2,199,632