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Series B Preferred Stock - Dividends and Redemptions (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  | 3 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 31, 2015 | Dec. 30, 2014 | Jun. 30, 2015 | Mar. 31, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Aug. 14, 2015 | Jul. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Preferred Stock |  |  |  |  |  |  |  |  |  |
Preferred stock |  |  |  |  |  |  |  |  | $ 47,331 |
Preferred Stock, Shares Outstanding |  |  |  |  |  |  |  |  | 47,331 |
Series B Stock |  |  |  |  |  |  |  |  |  |
Preferred Stock |  |  |  |  |  |  |  |  |  |
Repurchase price percentage of liquidation value (as a percent) |  |  |  |  | 94.75% |  |  |  |  |
Payments for repurchase of preferred stock |  |  |  |  | $ 24,300 |  |  |  |  |
Shares redeemed (in shares) | 15,778 |  | 25,669 | 15,778 | 25,669 |  |  |  |  |
Preferred stock |  |  |  |  |  |  |  |  | $ 47,300 | $ 72,900
Shares to be redeemed, percent of issued and outstanding |  | 33.33% |  |  |  |  |  |  |  |
Preferred Stock, Shares Outstanding |  | 47,331 |  | 31,553 |  | 0 |  | 31,553 |  |
Preferred Stock, Redemption Price Per Share |  | $ 1,000 |  |  |  |  | $ 1,000 | $ 1,000 |  |

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- Definition Represents the percentage of issued and outstanding stock redeemed during the period. + References No definition available. + Details
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- Definition The cash outflow to reacquire preferred stock during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The price per share at which the preferred stock of an entity that has priority over common stock in the distribution of dividends and in the event of liquidation of the entity is redeemed or may be called at. The redemption features of this preferred stock are solely within the control of the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21564-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21488-112644 + Details
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