Annual report pursuant to Section 13 and 15(d)

Related Party Transactions (Details)

v2.4.0.6
Related Party Transactions (Details) (USD $)
12 Months Ended 1 Months Ended 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Jan. 31, 1997
Robert Martin [Member]
Dec. 31, 2011
RMC Entity [Member]
Dec. 31, 2010
RMC Entity [Member]
Dec. 31, 2009
RMC Entity [Member]
Dec. 31, 2011
RMC Entities [Member]
Dec. 31, 2010
RMC Entities [Member]
Dec. 31, 2009
RMC Entities [Member]
Dec. 31, 2011
Cali [Member]
Dec. 31, 2010
Cali [Member]
Dec. 31, 2009
Cali [Member]
Dec. 31, 2011
Mack [Member]
Dec. 31, 2010
Mack [Member]
Dec. 31, 2009
Mack [Member]
Related Party Transaction [Line Items]                                
Lease revenue $ 600,163,000 $ 602,357,000 $ 611,061,000   $ 130,000 $ 137,000 $ 140,000       $ 69,000 $ 68,000 $ 68,000 $ 253,000 $ 250,000 $ 255,000
Number of class properties acquired       65                        
Lease of property in square feet 860,246       4,860           2,631     7,801    
Lease expiration date 2033                   December 2014          
Due from related parties         0 0   92,000 75,000   15,000 17,000   0 0  
Revenue under lease               1,200,000 1,400,000 1,600,000            
Reimbursement revenue                     $ 97,000 $ 101,000 $ 115,000