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Goodwill And Intangible Assets
12 Months Ended
Dec. 31, 2013
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, 2013 and 2012 are as follows (in thousands):

 

  2013 2012
       
Balance, beginning of period $ 1,652,002 $ 1,229,298
Goodwill acquired, including post acquisition adjustments   112,951   429,504
Goodwill disposed, including impact of deconsolidation transaction  (5,983)   (6,800)
       
 Balance, end of period $ 1,758,970 $ 1,652,002

Amortizable intangible assets at December 31, 2013 and 2012 consisted of the following (in thousands):

     2013 2012
     Gross        Gross       
     Carrying Accumulated    Carrying Accumulated   
     Amount Amortization  Net Amount Amortization  Net
                      
Deferred financing cost  $ 15,814 $ (4,953) $ 10,861 $ 14,523 $ (3,029) $ 11,494
Agreements, contracts and other intangible assets   3,448   (2,472)   976   3,448   (2,250)   1,198
                      
   Total amortizable intangible assets  $ 19,262 $ (7,425) $ 11,837 $ 17,971 $ (5,279) $ 12,692

Amortization of intangible assets for the years ended December 31, 2013, 2012 and 2011 was $2,178,000, $1,415,000 and $1,472,000, respectively. During 2012, deferred financing costs increased approximately $6,200,000 related to the issuance of the senior unsecured notes. Estimated amortization of intangible assets for the five years and thereafter subsequent to December 31, 2013, with a weighted average amortization period of 5.7 years, is $2,243,000, $2,242,000, $2,242,000, $1,988,000, $1,424,000 and $1,698,000.

 

At December 31, 2013 and 2012, other non-amortizable intangible assets related to restrictive covenant arrangements were $9,825,000, respectively.