Fair Value Measurements - Narrative (Detail)	3 Months Ended
Sep. 30, 2012
Weighted average cost of capital	19.00%
Discount rate	12.60%

Fair value assets and liability measured on recurring basis weighted average cost of capital.

No definition available.

Name:	har_FairValueAssetsAndLiabilityMeasuredOnRecurringBasisWeightedAverageCostOfCapital
Namespace Prefix:	har_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration