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Quarterly Supplemental Financial Information (unaudited) Quarterly Supplemental Financial Information (unaudited) (Tables)
 12 Months Ended
Dec. 31, 2012
Quarterly Supplemental Financial Information [Abstract]  
Schedule of quarterly financial information
The following represents the results of operations, for each quarterly period, during 2012 and 2011.
 
 
2012
 
Dec. 31
 
Sept. 30
 
June 30
 
March 31
Total income
$
370,758

 
$
368,639

 
$
378,834

 
$
319,164

Net loss
(2,731
)
 
(12,917
)
 
(17,791
)
 
(30,210
)
Net loss attributable to Company
(3,569
)
 
(17,576
)
 
(17,910
)
 
(30,283
)
Net loss, per common share, basic and diluted (1)
(0.01
)
 
(0.02
)
 
(0.02
)
 
(0.03
)
Weighted average number of common shares outstanding, basic and diluted (1)
886,849,317

 
881,717,879

 
877,188,933

 
872,886,566

 
2011
 
Dec. 31
 
Sept. 30
 
June 30
 
March 31
Total income
$
305,208

 
$
313,418

 
$
314,966

 
$
294,281

Net loss
(182,076
)
 
(48,952
)
 
(26,114
)
 
(52,403
)
Net loss attributable to Company
(182,188
)
 
(51,677
)
 
(27,761
)
 
(54,627
)
Net loss, per common share, basic and diluted (1)
(0.22
)
 
(0.06
)
 
(0.03
)
 
(0.06
)
Weighted average number of common shares outstanding, basic and diluted (1)
867,028,126

 
861,505,671

 
855,953,324

 
849,843,349

 
(1)
Quarterly income per common share amounts may not total to the annual amounts due to rounding and the changes in the number of weighted common shares outstanding