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USD ($)

USD ($) / shares

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USD ($)

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1/1/2011 - 3/31/2011
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1/1/2011 - 3/31/2011
USD ($)
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11/1/2008 - 11/30/2008
USD ($)
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7/1/2010 - 9/30/2010
USD ($)
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1/1/2010 - 12/31/2010
USD ($)
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3/24/2010
USD ($)
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1/1/2005 - 12/31/2005
USD ($)
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1/1/2009 - 12/31/2009
USD ($)
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1/1/2009 - 12/31/2009
USD ($)
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loss contingencies.</ElementDefenition><ElementReferences>Reference 1: http://www.xbrl.org/2003/role/presentationRef
 -Publisher AICPA
 -Name Statement of Position (SOP)
 -Number 96-1
 -Paragraph 161
 -Subparagraph a

Reference 2: http://www.xbrl.org/2003/role/presentationRef
 -Publisher FASB
 -Name Statement of Financial Accounting Standard (FAS)
 -Number 5
 -Paragraph 9

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value of the obligation (known or estimated) arising from requirements to perform activities to remediate one or more sites, payable in twelve months or in the next operating cycle if longer.</ElementDefenition><ElementReferences>Reference 1: http://www.xbrl.org/2003/role/presentationRef
 -Publisher AICPA
 -Name Statement of Position (SOP)
 -Number 96-1
 -Paragraph 161, 163

Reference 2: http://www.xbrl.org/2003/role/presentationRef
 -Publisher FASB
 -Name Statement of Financial Accounting Standard (FAS)
 -Number 5
 -Paragraph 9

Reference 3: http://www.xbrl.org/2003/role/presentationRef
 -Publisher SEC
 -Name Regulation S-X (SX)
 -Number 210
 -Section 02
 -Paragraph 20
 -Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef
 -Publisher AICPA
 -Name Accounting Research Bulletin (ARB)
 -Number 43
 -Chapter 3
 -Section A
 -Paragraph 8

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financial statements into the reporting currency. Adjustment shall not be included in determining net income, but shall be reported in other comprehensive income.</ElementDefenition><ElementReferences>Reference 1: http://www.xbrl.org/2003/role/presentationRef
 -Publisher FASB
 -Name Statement of Financial Accounting Standard (FAS)
 -Number 52
 -Paragraph 31
 -Subparagraph b

Reference 2: http://www.xbrl.org/2003/role/presentationRef
 -Publisher FASB
 -Name Statement of Financial Accounting Standard (FAS)
 -Number 52
 -Paragraph 13

Reference 3: http://www.xbrl.org/2003/role/presentationRef
 -Publisher FASB
 -Name Statement of Financial Accounting Standard (FAS)
 -Number 130
 -Paragraph 23, 24, 25

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