Intangible Assets - Schedule of Identifiable Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Cost	$ 168,409	$ 171,473
Accumulated Amortization	136,275	126,413
Net Carrying Value	32,134	45,060
Franchise-related Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	77,377	77,377
Accumulated Amortization	57,524	50,658
Net Carrying Value	19,853	26,719
Customer Lists and Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	62,002	62,144
Accumulated Amortization	49,739	45,940
Net Carrying Value	12,263	16,204
Copyrights and Designs [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	29,030	31,453
Accumulated Amortization	29,012	29,416
Net Carrying Value	$ 18	2,037
Non-compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Cost		500
Accumulated Amortization		400
Net Carrying Value		$ 100
Useful lives		5 years
Minimum [Member] | Franchise-related Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives	4 years	4 years
Minimum [Member] | Customer Lists and Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives	2 years	2 years
Minimum [Member] | Copyrights and Designs [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives	5 years	5 years
Maximum [Member] | Franchise-related Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives	19 years	19 years
Maximum [Member] | Customer Lists and Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives	20 years	20 years
Maximum [Member] | Copyrights and Designs [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives	7 years	7 years