Business Segment Information - Long-lived assets by geographic area (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2025	Dec. 31, 2024
Segment Reporting Information [Line Items]
Total Long-Lived Assets	$ 480,994	$ 428,728
US
Segment Reporting Information [Line Items]
Total Long-Lived Assets	374,173	332,162
GB
Segment Reporting Information [Line Items]
Total Long-Lived Assets	27,632	27,003
CN
Segment Reporting Information [Line Items]
Total Long-Lived Assets	33,841	36,315
Other
Segment Reporting Information [Line Items]
Total Long-Lived Assets	$ 45,348	$ 33,248