Summary of Significant Accounting Policies (Details)	12 Months Ended
Dec. 31, 2014 ReportingUnit
Goodwill [Line Items]
Total number of the Company's reporting units	5hsc_AggregateNumberOfReportingUnits
Number of reporting units which have goodwill associated with them	3us-gaap_NumberOfReportingUnits

Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Reporting Unit

-URI http://asc.fasb.org/extlink&oid=6523643

Name:	us-gaap_NumberOfReportingUnits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration