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Goodwill And Intangible Assets
12 Months Ended
Dec. 31, 2011
Goodwill And Intangible Assets  
Goodwill And Intangible Assets

5. Goodwill and Intangible Assets

 

The changes in the carrying amount of goodwill for the years ended December 31, 2011 and 2010 are as follows (in thousands):

 

  2011 2010
       
Balance, beginning of period $ 894,497 $ 813,876
Goodwill acquired, including post acquisition adjustments   344,089   86,539
Disposals   (9,288)   (5,918)
       
 Balance, end of period $ 1,229,298 $ 894,497

Amortizable intangible assets at December 31, 2011 and 2010 consisted of the following (in thousands):

     2011 2010
     Gross        Gross       
     Carrying Accumulated    Carrying Accumulated   
     Amount Amortization  Net Amount Amortization  Net
                      
Deferred financing cost  $ 6,541 $ (1,838) $ 4,703 $ 4,516 $ (567) $ 3,949
Agreements, contracts and other intangible assets   3,448   (2,026)   1,422   3,180   (1,818)   1,362
                      
   Total amortizable intangible assets  $ 9,989 $ (3,864) $ 6,125 $ 7,696 $ (2,385) $ 5,311

Amortization of intangible assets for the years ended December 31, 2011, 2010 and 2009 was $1,472,000, $1,184,000 and $492,000, respectively. Included in amortization expense for the year ended December 31, 2010 is $434,000 of previously unamortized deferred financing costs expensed in conjunction with the refinancing of the revolving credit facility (see note 6). Estimated amortization of intangible assets for the five years and thereafter subsequent to December 31, 2011, with a weighted average amortization period of 5 years, is $1,306,000, $ 1,303,000, $1,297,000, $1,297,000, $701,000 and $221,000.

 

At December 31, 2011 and 2010, other non-amortizable intangible assets related to restrictive covenant arrangements were $9,300,000 and $6,050,000, respectively.