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Securities Available For Sale (Tables) | 6 Months Ended
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Jun. 30, 2013
Schedule of Available-for-sale Securities [Line Items] |
Fair Value Of Auction Rate Securities By Security Type And Underlying Credit Rating | The following tables set forth the fair values of the Company’s auction rate securities by type of security and underlying credit rating as of the dates indicated (in millions):
| Underlying Credit Rating (1)
As of June 30, 2013 | AA- |  | BB |  | CCC |  | Total
Student loan auction rate securities | $ | 6.7 |  |  | $ | 2.6 |  |  |  |  | $ | 9.3 |
| Underlying Credit Rating (1)
As of December 31, 2012 | AA- |  | BB |  | CCC |  | Total
Student loan auction rate securities | $ | 9.1 |  |  | $ | 2.6 |  |  |  |  | $ | 11.7 |
Structured finance auction rate securities |  |  |  |  | 2.7 |  |  | 2.7 |
Total auction rate securities | $ | 9.1 |  |  | $ | 2.6 |  |  | $ | 2.7 |  |  | $ | 14.4 |
(1) | The Company’s auction rate securities maintain split ratings. For purposes of this table, securities are categorized according to their lowest rating.
Auction Rate Securities Reconciliation Of Cost Basis To Fair Value | The following table presents the cost basis, gross cumulative unrealized (losses) gains and estimated fair values of the Company’s auction rate securities as of the dates indicated (in millions):
| June 30, 2013
| Adjusted Cost Basis (1) |  | Gross Cumulative Unrealized (Losses)/Gains |  | Fair Value
Student loan auction rate securities | $ | 10.3 |  |  | $ | (1.0 | ) |  | $ | 9.3 |
| December 31, 2012
| Adjusted Cost Basis (1) |  | Gross Cumulative Unrealized (Losses)/Gains |  | Fair Value
Student loan auction rate securities | $ | 12.9 |  |  | $ | (1.2 | ) |  | $ | 11.7 |
Structured finance auction rate securities | 1.7 |  |  | 1.0 |  |  | 2.7 |
Total auction rate securities | $ | 14.6 |  |  | $ | (0.2 | ) |  | $ | 14.4 |
(1) | Adjusted cost basis reflects adjustments for credit and other losses recognized in earnings on our structured finance security. There were no adjustments to the cost basis of securities held as of June 30, 2013. Cumulative adjustments to the cost basis of securities held as of December 31, 2012 totaled $3.3 million. Par value of securities held as of June 30, 2013 and December 31, 2012 totaled $10.3 million and $17.9 million, respectively.
Auction Rate Securities [Member] | Securities Redeemed or Sold [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Auction Rate Securites Redeemed and Sold | Details of the second quarter 2013 redemption and sale transactions, as well as the corresponding securities, are as follows (in millions):
| Par Value |  | Cumulative Credit Losses |  | Adjusted Cost Basis |  | Gross Unrealized (Losses) Gains |  | Fair Value |  | Redemption or Sale Price |  | Reversal of Gross Unrealized Losses (Gains) |  | Realized Gain on Disposal
Student loan auction rate security | $ | 2.6 |  |  | $ | — |  |  | $ | 2.6 |  |  | $ | (0.2 | ) |  | $ | 2.4 |  |  | $ | 2.6 |  |  | $ | 0.2 |  |  | $ | — |
Structured finance auction rate security | 5.0 |  |  | (3.3 | ) |  | 1.7 |  |  | 1.3 |  |  | 3.0 |  |  | 2.4 |  |  | (0.6 | ) |  | (0.7 | )
Total | $ | 7.6 |  |  | $ | (3.3 | ) |  | $ | 4.3 |  |  | $ | 1.1 |  |  | $ | 5.4 |  |  | $ | 5.0 |  |  | $ | (0.4 | ) |  | $ | (0.7 | )
The gross unrealized gain of $1.1 million, net, was comprised of $0.7 million of unrealized gains in other comprehensive income and a deferred tax liability of $0.4 million.

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- Definition Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 03-1 -Paragraph 21 -Subparagraph a, b -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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27337-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27198-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27161-111563 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27357-111563 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 19, 20, 21 -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. Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 17 -Subparagraph a, b -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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- Definition Tabular disclosure of all significant concentrations of risk, including credit risk and market risk, arising from all financial instruments (as defined), whether from an individual counterparty or groups of counterparties. The disclosure concerning concentrations of risk may consist of the following information: (1) for concentrations of credit risk disclosure may include: (a) information about the (shared) activity, region, or economic characteristic that identifies the concentration, (b) the maximum amount of loss due to credit risk that, based on the gross fair value of the financial instrument, the entity would incur if parties to the financial instruments that make up the concentration failed completely to perform according to the terms of the contracts and the collateral or other security, if any, for the amount due proved to be of no value to the entity, (c) the policy of requiring collateral or other security to support financial instruments subject to credit risk, information about the entity's access to that collateral or other security, and the nature and a brief description of the collateral or other security supporting those financial instruments, and (d) the policy of entering into master netting arrangements to mitigate the credit risk of financial instruments, information about the arrangements for which the entity is a party, and a brief description of the terms of those arrangements, including the extent to which they would reduce the entity's maximum amount of loss due to credit risk and (2) for disclosure of quantitative information about the market risks of financial instruments that is consistent with the way the company manages or adjusts those risks, disclosure may include: (a) more details about current positions and perhaps activity during the period, (b) the hypothetical effects on comprehensive income (or net assets), or annual income, of several possible changes in market prices, (c) a gap analysis of interest rate re-pricing or maturity dates, (d) the duration of the financial instruments, (e) the entity's value at risk from derivatives and from other positions at the end of the reporting period and the average value at risk during the year, or (f) other ways of reporting quantitative information as internally developed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13531-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13537-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13572-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13587-108611 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15A, 15B, 15C, 15D -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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