Description of Business- Additional Information (Detail)	6 Months Ended
	Jun. 30, 2021 Store
PC Nextco [Member]
Basis Of Presentation [Line Items]
Ownership percentage	100.00%
PC Intermediate [Member]
Basis Of Presentation [Line Items]
Ownership percentage	100.00%
Party City Holdings Inc [Member]
Basis Of Presentation [Line Items]
Ownership percentage	100.00%
United States and Canada [Member]
Basis Of Presentation [Line Items]
Number of stores	831