Organization, Description of Business and Basis of Presentation - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2019 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 stores	875