Description of Business - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2018 outlet Country Store
Minimum [Member]
Basis Of Presentation [Line Items]
Number stores | outlet	40,000
Number of countries in which products available | Country	100
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 | Store	900