Description of Business - Additional Information (Detail) $ in Thousands	1 Months Ended		9 Months Ended
	Mar. 31, 2016 USD ($)	Jan. 31, 2016 USD ($) Franchised_Stores	Sep. 30, 2016 Store
Festival S A [Member]
Basis Of Presentation [Line Items]
Total consideration amount | $	$ 5,000
PC Nextco [Member]
Basis Of Presentation [Line Items]
Ownership percentage			100.00%
Reportable Legal Entity Pc Intermediate Holdings Inc [Member]
Basis Of Presentation [Line Items]
Ownership percentage			100.00%
Party City Holdings Inc [Member]
Basis Of Presentation [Line Items]
Ownership percentage			100.00%
Arizona and New Mexico [Member]
Basis Of Presentation [Line Items]
Number of franchise stores acquired | Franchised_Stores		19
Total consideration amount | $		$ 26,500
United States and Canada [Member]
Basis Of Presentation [Line Items]
Number of specialty retail party supply stores | Store			900
Number of franchise stores included in retail operation | Store			180