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Other Intangible Assets and Goodwill (Tables)
 12 Months Ended
Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Summary of core deposit intangibles
The following table sets forth information regarding the Company’s core deposit intangibles:

 At or for the Years ended
(Dollars in thousands)December 31,
2020		December 31,
2019		December 31,
2018
Gross carrying value$88,099 85,506 62,977 
Accumulated amortization(32,590)(22,220)(13,735)
Net carrying value$55,509 63,286 49,242 
Aggregate amortization expense$10,370 8,485 6,270 
Estimated amortization expense for the years ending December 31,
2021$9,951 
20229,414 
20238,614 
20247,826 
20256,750 
Changes in the carrying value of goodwill
The following schedule discloses the changes in the carrying value of goodwill:

 Years ended
(Dollars in thousands)December 31,
2020		December 31,
2019		December 31,
2018
Net carrying value at beginning of period$456,418 289,586 177,811 
Acquisitions and adjustments57,595 166,832 111,775 
Net carrying value at end of period$514,013 456,418 289,586