Unaudited Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023
Stockholders' equity:
Preferred stock, par value	$ 0.01	$ 0.01	$ 0.01
Preferred stock, authorized	20,000,000	20,000,000	20,000,000
Preferred stock, issued	0	0	0
Preferred stock, outstanding	0	0	0
Treasury Stock, (In shares)	4,456,000	4,551,000	5,046,000
Class A common stock
Stockholders' equity:
Common stock, par value	$ 0.01	$ 0.01	$ 0.01
Common stock, authorized	250,000,000	250,000,000	250,000,000
Common stock, issued	49,571,000	49,571,000	49,571,000
Common stock, outstanding	45,115,000	45,020,000	44,525,000
Class B common stock
Stockholders' equity:
Common stock, par value	$ 0.0001	$ 0.0001	$ 0.0001
Common stock, authorized	75,000,000	75,000,000	75,000,000
Common stock, issued	39,466,000	39,466,000	39,466,000
Common stock, outstanding	39,466,000	39,466,000	39,466,000
Class C common stock
Stockholders' equity:
Common stock, par value	$ 0.0001	$ 0.0001	$ 0.0001
Common stock, authorized	1	1	1
Common stock, issued	1	1	1
Common stock, outstanding	1	1	1