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Fair Value Measurements (Details 3) (ARS, USD $) In Millions, unless otherwise specified |  |  | 9 Months Ended
--- | --- | --- | ---
Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2013 Minimum Income approach valuation model | Sep. 30, 2013 Maximum Income approach valuation model
Fair value inputs, Quantitative information |  |  |  |
Investment in auction rate securities | $ 46.3 | $ 46.3 |  |
Fair value inputs |  |  |  |
Discount rate (as a percent) |  |  | 3.00% | 7.00%
Term of auction rate securities |  |  | 6 years | 8 years

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- Definition This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References No definition available. + Details
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- Definition Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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