Consolidated Statements Of Operations And Comprehensive (Loss) Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues:
Total revenues	$ 2,348,789	$ 2,427,515	$ 2,371,569
Expenses:
Cost of sales	1,500,633	1,435,358	1,395,279
Wholesale selling expenses	67,103	71,502	65,356
Retail operating expenses	440,395	425,996	415,167
Franchise expenses	13,152	13,214	14,957
General and administrative expenses	177,672	172,764	168,369
Art and development costs	23,203	23,388	23,331
Development stage expenses	10,736	7,008	8,974
Gain on sale/leaseback transaction	(58,381)
Store impairment and restructuring charges	29,038
Goodwill and intangibles impairment	562,631	0	0
Total expenses	2,766,182	2,149,230	2,091,433
(Loss) income from operations	(417,393)	278,285	280,136
Interest expense, net	114,899	105,706	87,366
Other expense, net	1,871	10,982	4,626
(Loss) income before income taxes	(534,163)	161,597	188,144
Income tax expense (benefit)	(1,305)	38,778	(27,196)
Net (loss) income	(532,858)	122,819	215,340
Add: Net income attributable to redeemable securities holder		409
Less: Net loss attributable to noncontrolling interests	(363)	(31)
Net (loss) income attributable to common shareholders of Party City Holdco Inc	$ (532,495)	$ 123,259	$ 215,340
Net (loss) income per share attributable to common shareholders of Party City Holdco Inc.-Basic	$ (5.71)	$ 1.28	$ 1.81
Net (loss) income per share attributable to common shareholders of Party City Holdco Inc.-Diluted	$ (5.71)	$ 1.27	$ 1.79
Weighted-average number of common shares-Basic	93,295,692	96,133,144	118,589,421
Weighted-average number of common shares-Diluted	93,295,692	97,271,050	119,894,021
Other comprehensive (loss) income, net of tax:
Foreign currency adjustments	$ 12,599	$ (14,479)	$ 17,561
Cash flow hedges	845	1,063	(1,140)
Other comprehensive income (loss), net	13,444	(13,416)	16,421
Comprehensive (loss) income	(519,414)	109,403	231,761
Add: Comprehensive income attributable to redeemable securities holder		409
Less: Comprehensive loss attributable to noncontrolling interests	(386)	(64)
Comprehensive (loss) income attributable to common shareholders of Party City Holdco Inc.	(519,028)	109,876	231,761
Net Sales [Member]
Revenues:
Revenues	2,339,510	2,416,442	2,357,986
Royalties and Franchise Fees [Member]
Revenues:
Revenues	$ 9,279	$ 11,073	$ 13,583