Significant Accounting Polices - Income Taxes (Details)	12 Months Ended
	Dec. 31, 2012
Significant Accounting Policies [Abstract]
Discussion of the distribution requirements for REIT compliance	A REIT must generally distribute at least 90% of its REIT taxable income to its stockholders, of which 85% generally must be distributed within the taxable year, in order to avoid the imposition of an excise tax. The remaining balance may be distributed up to the end of the following taxable year, provided the REIT elects to treat such amount as a prior year distribution and meets certain other requirements.
Earliest Tax Year Open to Examination	2009