Organization and Significant Accounting Policies - Disaggregation Of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 3,566,324	$ 3,900,125	$ 3,646,342
Branded Services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,306,336	1,758,417	1,764,076
Branded Services [Member] | Brokerage Services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	495,302	534,670	554,226
Branded Services [Member] | Branded Merchandising Services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	428,821	444,859	429,873
Branded Services [Member] | Omni Commerce Marketing Services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	382,213	404,522	408,494
Branded Services [Member] | International Joint Venture [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	374,366	371,483
Experiential Services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,295,029	1,159,449	904,230
Retail Services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	964,959	982,259	978,036
Retail Services [Member] | Retail Merchandising Services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	701,709	714,052	712,189
Retail Services [Member] | Advisory Services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	197,506	207,675	217,992
Retail Services [Member] | Agency Services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 65,744	$ 60,532	$ 47,855