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Income Taxes (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Income Tax Disclosure [Abstract] |  |  |
Estimated REIT taxable income | $ 73,962 | $ 43,988 | $ 24,669
Operating Loss Carryforwards [Line Items] |  |  |
Operating Loss Carryforwards | 135,857 |  |
Operating Loss Carryforward, Limitations on Use | As a result of its common stock offering in February 2012, the Company incurred an "ownership change" under Section 382 of the Internal Revenue Code ("Section 382"). In general, if a company incurs an ownership change under Section 382, the company's ability to utilize an NOL carryforward to offset its taxable income after any required dividend distributions, becomes limited to a certain amount per year. Due to the ownership change, the Company's ability to use its NOL is limited to an estimated $13,451 per year. |  |
Operating Loss Carryforward, Expiration Dates | The NOL will begin to expire principally in the years 2020-2024 to the extent it is not used. |  |
Taxable REIT subsidiary [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Operating Loss Carryforwards | $ 4,208 |  |

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- Definition The sum of domestic, foreign and state and local operating loss carryforwards, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 48 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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