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Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Line Items]
Balance at beginning of the period		$ 43,208	$ 44,199
Adjustments to goodwill for foreign currency translation		464	(991)
Impairment	$ 8,300	8,288	0
Goodwill Ending Balance		35,384	43,208
U.S. and Canada
Goodwill [Line Items]
Balance at beginning of the period		29,540	30,218
Adjustments to goodwill for foreign currency translation		317	(678)
Impairment		(6,053)
Goodwill Ending Balance		23,804	29,540
International
Goodwill [Line Items]
Balance at beginning of the period		11,455	11,717
Adjustments to goodwill for foreign currency translation		125	(262)
Goodwill Ending Balance		11,580	11,455
Halloween
Goodwill [Line Items]
Balance at beginning of the period		2,213	2,264
Adjustments to goodwill for foreign currency translation		22	(51)
Impairment		$ (2,235)
Goodwill Ending Balance			$ 2,213

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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X

- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (f)
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- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Topic 350
-SubTopic 20
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-Topic 230
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