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GOODWILL AND INTANGIBLE ASSETS (Tables)
 12 Months Ended
Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Change in the Carrying Value of Goodwill
The change in the carrying value of goodwill for the years ended December 31, 2021 and 2020 is summarized below for both the total Company and by the Company's reporting units.
December 31,
(dollars in thousands)20212020
Consolidated
Carrying amount of goodwill at beginning of year$928,005 $931,637 
Additions related to acquisitions in current year84,615 — 
Fair value adjustments related to acquisitions in prior year— (3,632)
Carrying amount of goodwill at end of year$1,012,620 $928,005 
Banking
Carrying amount of goodwill at beginning of year$863,507 $867,139 
Additions related to acquisitions in current year84,615 — 
Fair value adjustments related to acquisitions in prior year— (3,632)
Carrying amount of goodwill at end of year$948,122 $863,507 
Premium Finance Division
Carrying amount of goodwill at beginning of year$64,498 $64,498 
Carrying amount of goodwill at end of year$64,498 $64,498 
Summary of Information Related to Acquired Intangible Assets
The following is a summary of information related to acquired intangible assets:
As of December 31, 2021As of December 31, 2020
(dollars in thousands)
Gross
Amount
Accumulated
Amortization
Gross
Amount
Accumulated
Amortization
Amortized intangible assets:
   Core deposit premiums$103,574 $58,456 $107,958 $50,829 
   Referral relationships88,651 10,943 22,351 8,149 
  Trade names2,734 612 1,094 456 
Patent420 — — — 
   Non-compete agreements732 162 162 157 
$196,111 $70,173 $131,565 $59,591 
Estimated Amortization Expense The estimated amortization expense for each of the next five years and thereafter is as follows (in thousands):
2022$19,744 
202318,244 
202417,189 
202515,937 
202612,394 
Thereafter42,430 
$125,938