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Income Taxes (Details Textual) (USD $) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Income Tax (Additional Textual) [Abstract] |  |  |  |
Change in valuation allowance related to deferred tax assets | $ 4,500,000 |  | $ 51,000,000 |
Income Taxes (Textual) [Abstract] |  |  |  |
Gross deferred tax assets related to state net operating loss carryforwards | 294,300,000 |  |  |
Valuation allowance related to certain state net operating loss carryforward deferred tax assets | 6,300,000 |  |  |
Liabilities recorded related to unrecognized tax benefits |  | 18,600,000 |  |
Liabilities related to interest and penalties | 2,400,000 | 4,900,000 |  |
Unorganized tax benefit would affect income tax rate if recognized | 5,500,000 | 11,600,000 |  |
Income tax examination range Upper limit | 2006 |  |  |
Income tax examination range lower limit | 2012 |  |  |
Accrued interest and penalties | 2,400,000 | 4,900,000 | 5,100,000 | 6,400,000
Net short-term deferred tax asset | 16,500,000 | 2,300,000 |  |
Net long-term deferred tax asset | 4,300,000 | 17,600,000 |  |
Net long-term deferred tax liability | 10,768,000 | 1,419,000 |  |
State and Local Jurisdiction [Member] |  |  |  |
Income Tax (Additional Textual) [Abstract] |  |  |  |
Operating loss expiration date | net operating loss carryforwards that will expire between 2015 and 2032 |  |  |
Continuing Operations [Member] |  |  |  |
Income Tax (Additional Textual) [Abstract] |  |  |  |
Change in valuation allowance related to deferred tax assets |  |  | 48,800,000 |
Discontinued Operations [Member] |  |  |  |
Income Tax (Additional Textual) [Abstract] |  |  |  |
Change in valuation allowance related to deferred tax assets |  |  | $ 2,200,000 |

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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards expected to be realized or consumed within one year or operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=21917399&loc=d3e31928-109318 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=21917399&loc=d3e31917-109318 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=21917399&loc=d3e31958-109318 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=21917399&loc=d3e31931-109318 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 41, 42, 43 -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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