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BASIS OF PRESENTATION (Narrative) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 27, 2014 | Dec. 28, 2013 | Dec. 27, 2014 | Dec. 28, 2013 | Mar. 29, 2014
Term of each fiscal year |  |  | 364 days |  | 364 days
Term of each quarter |  |  | 91 days |  | 91 days
Total operating expenses | $ 93,401 us-gaap_OperatingExpenses | $ 103,769 us-gaap_OperatingExpenses | $ 297,051 us-gaap_OperatingExpenses | $ 318,243 us-gaap_OperatingExpenses |
Operating Expenses Would Be Higher [Member] |  |  |  |  |
Total operating expenses | $ 1,700 us-gaap_OperatingExpenses / us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis = hae_OperatingExpensesWouldBeHigherMember |  | $ 1,700 us-gaap_OperatingExpenses / us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis = hae_OperatingExpensesWouldBeHigherMember |  |

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- Definition Term of Each Quarter + References No definition available. + Details
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Balance Type: | na
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- Definition Duration of a fiscal period, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense. + References No definition available. + Details
Name: | us-gaap_OperatingExpenses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
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Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |