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Subsequent Event (Details) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended		1 Months Ended
	Jun. 30, 2013 Fabrication USD ($)	Jun. 30, 2013 Canada USD ($)	Jun. 30, 2012 Canada USD ($)	Jun. 30, 2013 Canada USD ($)	Jun. 30, 2012 Canada USD ($)	Jul. 31, 2013 Subsequent event Canada USD ($)	Jul. 31, 2013 Subsequent event Canada CAD
Subsequent event
Cash proceeds						$ 12.4
Note receivable							6.6
Contingent consideration							5.0
Potential tax refund							1.6
Impairment charges	$ 11.9	$ 3.9	$ 40.8	$ 6.0	$ 40.8

X

- Definition

Amount of potential cash receipts that may be received from the contingent consideration arrangement for selling an asset or business.

+ References

No definition available.

+ Details

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X

- Definition

Amount of note receivable received as partial consideration for selling an asset or business.

+ References

No definition available.

+ Details

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X

- Definition

Amount of potential tax refund that may be received as partial consideration for selling an asset or business.

+ References

No definition available.

+ Details

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X

- Definition

The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 45

-Paragraph 15

-URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2611-110228



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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 144

-Paragraph 27, 28, 29, 30

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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X

- Definition

The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3179-108585



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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 15, 16

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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