federal realty investment trust schedule iii summary of real estate and accumulated depreciation 2014continued three years ended december 31 , 2007 reconciliation of accumulated depreciation and amortization ( in thousands ) .
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Balance, December 31, 2004 $595,338
Additions during period—depreciation and amortization expense 83,656
Deductions during period—disposition and retirements of property (15,244)
Balance, December 31, 2005 $663,750
Additions during period—depreciation and amortization expense 89,564
Deductions during period—disposition and retirements of property (12,807)
Balance, December 31, 2006 $740,507
Additions during period—depreciation and amortization expense 96,454
Deductions during period—disposition and retirements of property (80,258)
Balance, December 31, 2007 $756,703
balance december 31 2004 $ 595338
additions during period 2014depreciation and amortization expense 83656
deductions during period 2014disposition and retirements of property -15244 ( 15244 )
balance december 31 2005 $ 663750
additions during period 2014depreciation and amortization expense 89564
deductions during period 2014disposition and retirements of property -12807 ( 12807 )
balance december 31 2006 $ 740507
additions during period 2014depreciation and amortization expense 96454
deductions during period 2014disposition and retirements of property -80258 ( 80258 )
balance december 31 2007 $ 756703