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Intangible Assets and Liabilities
9 Months Ended
Sep. 30, 2011
Intangible Assets and Liabilities [Abstract] 
Intangible Assets and Liabilities
5.      Intangible Assets and Liabilities

The following table sets forth total intangible assets and liabilities, net of accumulated amortization:

   
September 30,
2011
 
December 31,
2010
 
Assets:
             
Deferred financing costs
 
$
19,168
 
$
16,412
 
Less accumulated amortization
   
(6,192
)
 
(7,054
)
     
12,976
   
9,358
 
Deferred leasing costs (including lease incentives and acquisition-related intangible assets)
   
171,093
   
127,949
 
Less accumulated amortization
   
(54,758
)
 
(52,306
)
     
116,335
   
75,643
 
Deferred financing and leasing costs, net
 
$
129,311
 
$
85,001
 
               
Liabilities (in accounts payable, accrued expenses and other liabilities):
             
Acquisition-related intangible liabilities
 
$
16,455
 
$
658
 
Less accumulated amortization
   
(425
)
 
(125
)
   
$
16,030
 
$
533
 

The following table sets forth amortization of intangible assets and liabilities:

   
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
   
2011
 
2010
 
2011
 
2010
 
Amortization of deferred financing costs
 
$
806
 
$
858
 
$
2,448
 
$
2,528
 
Amortization of deferred leasing costs and acquisition-related intangible assets (in depreciation and amortization)
 
$
5,188
 
$
3,912
 
$
13,945
 
$
11,495
 
Amortization of lease incentives (in rental and other revenues)
 
$
368
 
$
270
 
$
1,009
 
$
807
 
Amortization of acquisition-related intangible assets (in rental and other revenues)
 
$
240
 
$
200
 
$
618
 
$
318
 
Amortization of acquisition-related intangible liabilities (in rental and other revenues)
 
$
(229
)
$
(27
)
$
(280
)
$
(69
)

The following table sets forth scheduled future amortization of intangible assets and liabilities:

   
Amortization of Deferred Financing Costs
 
Amortization of Deferred Leasing Costs and Acquisition-Related Intangible Assets (in Depreciation and Amortization)
 
Amortization of Lease Incentives (in Rental and Other Revenues)
 
Amortization of Acquisition-Related Intangible Assets (in Rental and Other Revenues)
 
Amortization of Acquisition-Related Intangible Liabilities (in Rental and Other Revenues)
 
October 1, 2011 through December 31, 2011
 
$
931
 
$
6,263
 
$
323
 
$
271
 
$
(141
)
2012                                                 
   
3,192
   
22,604
   
1,234
   
1,049
   
(556
)
2013                                                 
   
2,956
   
17,849
   
1,080
   
802
   
(542
)
2014                                                 
   
2,660
   
13,609
   
913
   
505
   
(467
)
2015                                                 
   
2,064
   
9,950
   
695
   
335
   
(421
)
Thereafter                                                 
   
1,173
   
35,214
   
2,536
   
1,103
   
(13,903
)
   
$
12,976
 
$
105,489
 
$
6,781
 
$
4,065
 
$
(16,030
)
 
The weighted average remaining amortization periods for deferred financing costs, deferred leasing costs and acquisition-related intangible assets (in depreciation and amortization), lease incentives (in rental and other revenues), acquisition-related intangible assets (in rental and other revenues) and acquisition-related intangible liabilities (in rental and other revenues) were 3.9 years, 6.4 years, 8.1 years, 5.8 years and 8.8 years, respectively, as of September 30, 2011.

In connection with the acquisitions of office properties in Atlanta, GA and Pittsburgh, PA in the third quarter of 2011, we recorded $1.6 million of above market lease intangible assets, $38.1 million of in-place lease intangible assets and $15.6 million of below market lease intangible liabilities with weighted average amortization periods of 5.4 years, 6.7 years and 8.8 years, respectively.