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Intangible Assets
12 Months Ended
Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets Intangible Assets
Intangible assets at December 31, 2019 and 2018 are summarized as follows (in thousands):
20192018
Goodwill$420,562  411,600  
Core deposit premiums1,753  2,539  
Customer relationship and other intangibles14,142  3,410  
Mortgage servicing rights562  629  
Total intangible assets$437,019  418,178  
Amortization expense of intangible assets for the years ended December 31, 2019, 2018 and 2017 is as follows (in thousands):
201920182017
Core deposit premiums$786  931  1,076  
Customer relationship and other intangibles1,869  1,073  1,474  
Mortgage servicing rights85  123  120  
Total amortization expense of intangible assets$2,740  2,127  2,670  
Scheduled amortization of core deposit premiums and customer relationship and other intangibles for each of the next five years is as follows (in thousands): 
Year ended December 31,Scheduled Amortization
2020$2,675  
20212,380  
20222,085  
20231,793  
20241,517