Earnings Per Share - Additional Information (Detail) In Millions, unless otherwise specified	6 Months Ended
Jun. 30, 2014
Earnings Per Share Disclosure [Line Items]
Restricted share awards excluded from the computation diluted earnings per share	5.2

Number Of Performance Based Restricted Share Awards Excluded From Diluted Earnings Per Share

No definition available.

Name:	jah_NumberOfPerformanceBasedRestrictedShareAwardsExcludedFromDilutedEarningsPerShare
Namespace Prefix:	jah_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration