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Income Taxes (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Jun. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Income Tax Contingency [Line Items] |  |  |  |  |
Income tax credits and adjustments |  | $ 880 |  |  |
Provision for income taxes | 15,731 |  | 5,803 | 19,384 | 11,924
Federal Tax Authority |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Income tax credits and adjustments | 41,171 |  |  |  |
Other deferred tax liabilities | 14,410 |  |  | 14,410 |
State Tax Authority |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Income tax credits and adjustments |  |  |  | 83,524 |
Provision for income taxes |  |  |  | 4,799 |
2014 Federal and State Repairs and Maintenance Deduction [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Income tax credits and adjustments |  |  |  | 19,395 |
2014 Federal and State Repairs and Maintenance Deduction [Member] | Federal Tax Authority |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Other deferred tax liabilities | 5,091 |  |  | 5,091 |
2014 Federal and State Repairs and Maintenance Deduction [Member] | State Tax Authority |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Provision for income taxes |  |  |  | $ (853) |

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- Definition A credit or adjustment for government or taxing authority authorized decrease in taxes owed as a result of meeting certain tax policy conditions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Income Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6515339 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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