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USD ($)
USD ($) / shares
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USD ($)
$eol_PE10216---1010-K0013_STD_0_20091231_0http://www.sec.gov/CIK0001090727instant2009-12-31T00:00:000001-01-01T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170sharesStandardhttp://www.xbrl.org/2003/instanceshares0pureStandardhttp://www.xbrl.org/2003/instancepure0USDUSD$3falsefalseUSDtruefalse{us-gaap_StatementEquityComponentsAxis} : Treasury Stock
1/1/2010 - 12/31/2010
USD ($)
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1/1/2009 - 12/31/2009
USD ($)
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1/1/2008 - 12/31/2008
USD ($)
$eol_PE10216---1010-K0013_STD_366_20081231_0_411810x412372http://www.sec.gov/CIK0001090727duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseTreasury Stockus-gaap_StatementEquityComponentsAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_TreasuryStockMemberus-gaap_StatementEquityComponentsAxisexplicitMembersharesStandardhttp://www.xbrl.org/2003/in
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1/1/2010 - 12/31/2010
USD ($)
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1/1/2009 - 12/31/2009
USD ($)
$eol_PE10216---1010-K0013_STD_365_20091231_0_411810x401822http://www.sec.gov/CIK0001090727duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseDeferred Compensation Obligationsus-gaap_StatementEquityComponentsAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_DeferredCompensationShareBasedPaymentsMemberus-gaap_StatementEquityComponentsAxisexplicitMemberiso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$8falsefalseUSDtruefalse{us-gaap_StatementEquityComponentsAxis} : Deferred Compensation Obligations [Member]
1/1/2008 - 12/31/2008
USD ($)
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-Name Accounting Research Bulletin (ARB)
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-Name Regulation S-X (SX)
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-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-Name Accounting Research Bulletin (ARB)
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-Name Regulation S-X (SX)
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