Intangible Assets - Additional Information (Detail) - USD ($)	3 Months Ended			12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Amortization expense for finite-lived intangible assets				$ 11,362,000	$ 14,100,000	$ 12,271,000
Amortization expense for next twelve months	$ 8,265,000			8,265,000
Amortization expense for two year	5,444,000			5,444,000
Amortization expense for three year	4,126,000			4,126,000
Amortization expense for four year	3,510,000			3,510,000
Amortization expense for five year	2,920,000			$ 2,920,000
Impairment charge on intangible asset		$ 2,423,000
Tangible asset impairment charges	$ 0	31,277,000
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of indefinite-lived intangibles		$ 11,032,000
Party City Holdings Inc [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment charge on intangible asset			$ 131,287,000		0
Halloween City Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment charge on intangible asset			$ 3,925,000		$ 6,575,000