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Concentration of Credit Risk - Additional Information (Detail) $ in Millions	Dec. 31, 2017 USD ($)
Toys 'R' Us
Concentration Risk [Line Items]
Pre-petition consolidated accounts receivable, reserved	$ 8.9

X

- Definition

Prepetition Bankruptcy Receivables, Reserve

+ References

No definition available.

+ Details

Name:	jakk_PrepetitionBankruptcyReceivablesReserve
Namespace Prefix:	jakk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ConcentrationRiskLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_MajorCustomersAxis=jakk_CustomerTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: