Nature of Operations and Basis of Presentation (Details)	3 Months Ended
Dec. 31, 2011	Dec. 31, 2010
Nature of Operations and Basis of Presentation
Percentage of total revenue and cost of revenue for services	13.00%	14.00%

Represents the percentage of total revenue and cost of revenue for services.

No definition available.

Name:	hw_PercentageOfTotalRevenueAndCostOfRevenueForServices
Namespace Prefix:	hw_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration