| Commitments And Contingencies (Future Minimum Rental Payments Of Ground Leases) (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2012 | 
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| Commitments And Contingencies [Abstract] | |
| April 1 through December 31, 2012 | $ 275 | 
| 2013 | 351 | 
| 2014 | 367 | 
| 2015 | 371 | 
| 2016 | 371 | 
| 2017 through 2084 | 16,318 | 
| Total | $ 18,053 | 
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- Details 
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- Definition The total of future contractually required payments on leases defined as operating. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within one year of the balance sheet date relating to leases defined as operating. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the fifth year of the balance sheet date relating to leases defined as operating. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the fourth year of the balance sheet date relating to leases defined as operating. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the third year of the balance sheet date relating to leases defined as operating. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the second year of the balance sheet date relating to leases defined as operating. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due after the fifth year from the balance sheet date on leases defined as operating. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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