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Fair Value Measurements (Details 5) (ARS, USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2012 | Jun. 30, 2012 item | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012
ARS |  |  |  |  |
Changes in Level 3 assets measured at fair value on recurring basis |  |  |  |  |
Beginning balance | $ 62,311 | $ 62,311 | $ 46,283 | $ 46,283 | $ 46,283
Settlements | (16,553) |  |  |  |
Realized loss included in other income (expense), net | (2,699) |  |  |  |
Reversal of pretax impairment charges included in accumulated other comprehensive income (loss) | 3,224 |  |  |  |
Ending balance | $ 46,283 | $ 46,283 | $ 46,283 | $ 46,283 | $ 46,283
Number of auction rate securities sold or redeemed for full par value |  | 1 |  |  |
Number of auction rate securities (ARS) sold in a secondary market |  | 2 |  |  |
Number of auction rate securities (ARS) settled |  | 3 |  |  |

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- Definition The number of auction rate securities (ARS) sold in a secondary market during the period. + References No definition available. + Details
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- Definition The number of auction rate securities (ARS) sold or redeemed for its full par value during the period. + References No definition available. + Details
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- Definition Amount of gain (loss) recognized in earnings, arising from assets measured at fair value on a recurring basis using unobservable inputs (level 3). + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition Settlements that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy. + 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 (c)(2) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition This element represents an asset measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances. + 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 (c) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c -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. + Details
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