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Significant Accounting Policies (Tables)
 6 Months Ended
Jun. 30, 2012
Significant Accounting Policies  
Details of carrying amount of noncontrolling interests

 

 

 
   As of
June 30,
2012 		  As of
December 31,
2011

Limited partners' interests in the Operating Partnership

   $ 1,186,052   $ 953,622

Nonredeemable noncontrolling deficit interests in properties, net

     (634)     (59,000)
         

Total noncontrolling interests reflected in equity

   $ 1,185,418   $ 894,622
         

 
Rollforward of noncontrolling interests reflected in equity

 

 

 
   For the Three Months
Ended June 30, 		  For the Six Months
Ended June 30,
 
   2012   2011   2012   2011

Noncontrolling interests, beginning of period

   $ 1,215,628   $ 771,152   $ 894,622   $ 802,972

Net Income attributable to noncontrolling interests after preferred distributions and income attributable to redeemable noncontrolling interests in consolidated properties

     42,308     44,088     175,318     83,029

Distributions to noncontrolling interest holders

     (61,107)     (49,993)     (119,205)     (120,386)

Other comprehensive income (loss) allocable to noncontrolling interests:

                        

Unrealized (loss) gain on interest rate hedge agreements

     (1,395)     (1,294)     1,006     (3,194)

Net loss on derivative instruments reclassified from accumulated comprehensive loss into interest expense

     858     647     1,716     1,318

Currency translation adjustments

     (10,957)     1,489     (3,433)     5,228

Changes in available-for-sale securities and other

     (138)     4,334     3,819     4,677
                 

 

     (11,632)     5,176     3,108     8,029
                 

Adjustment to limited partners' interest from (decreased) increased ownership in the Operating Partnership

     (7,547)     (947)     156,299     (6,585)

Units issued to limited partners

     —     —     —     202

Units exchanged for common shares

     (2,600)     (3,712)     (4,018)     (5,923)

Purchase of noncontrolling interest and other

     10,368     8,130     79,294     12,556
                 

Noncontrolling interests, end of period

   $ 1,185,418   $ 773,894   $ 1,185,418   $ 773,894
                 
Outstanding interest rate derivatives related to interest rate risk:

 

 

Interest Rate Derivative
  Number of
Instruments 		  Notional Amount
Interest Rate Swaps     3   $484.7 million
Interest Rate Caps     6   $444.4 million