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Basic and Diluted Earnings per Share - Narrative (Details) (USD $) In Millions, except Share data, unless otherwise specified | 1 Months Ended |  | 12 Months Ended |
--- | --- | --- | --- | ---
Mar. 31, 2012 | Dec. 31, 2012 | Dec. 31, 2013 Convertible Notes Payable [Member] | Sep. 30, 2012 Convertible Notes Payable [Member]
Debt Instrument [Line Items] |  |  |  |
Stated percentage of convertible notes |  | 3.25% |  | 3.25%
Debt Conversion, Converted Instrument, Shares Issued | 4,635,159 |  | 4,635,159 |
Debt Conversion, Original Debt, Amount |  |  | $ 56.4 |

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- Definition The amount of the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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