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Other Intangible Assets and Goodwill (Tables)
 12 Months Ended
Dec. 31, 2019
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,
2019		December 31,
2018		December 31,
2017
Gross carrying value$85,506  62,977  21,649  
Accumulated amortization(22,220) (13,735) (7,465) 
Net carrying value$63,286  49,242  14,184  
Aggregate amortization expense$8,485  6,270  2,494  
Estimated amortization expense for the years ending December 31,
2020$9,978  
20219,519  
20229,029  
20238,276  
20247,535  
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,
2019		December 31,
2018		December 31,
2017
Net carrying value at beginning of period$289,586  177,811  147,053  
Acquisitions and adjustments166,832  111,775  30,758  
Net carrying value at end of period$456,418  289,586  177,811