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Litigation, Commitments and Contingencies (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Jul. 01, 2012
Commitments and Contingencies Disclosure [Abstract]
Pretax settlement obligation	$ 3.2
Income recorded cost of sales after tax	$ 2.0
Income recorded cost of sales per share value (usd per share)	$ 0.19

X

- Definition

Loss contingency settlement agreement consideration after tax.

+ References

No definition available.

+ Details

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Namespace Prefix:	hwkn_
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Balance Type:	credit
Period Type:	duration

X

- Definition

Loss contingency settlement agreement consideration per share value.

+ References

No definition available.

+ Details

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Namespace Prefix:	hwkn_
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Balance Type:	na
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X

- Details

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Balance Type:	na
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X

- Definition

Amount of consideration the entity has agreed to pay to settle a legal matter.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14326-108349



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14435-108349



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 9

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14557-108349

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