Premises and equipment
 12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment [Abstract]  
Premises and equipment Premises and equipment:
Premises and equipment and related accumulated depreciation as of December 31, 2020 and 2019, are as follows:
 20202019
Land$33,151 $26,283 
Premises108,579 65,569 
Furniture and fixtures26,729 23,545 
Leasehold improvements18,429 12,989 
Equipment16,904 15,575 
Construction in process1,501 800 
Finance lease 1,588 — 
206,881 144,761 
Less: accumulated depreciation and amortization(61,766)(54,630)
Total Premises and Equipment$145,115 $90,131 
Depreciation and amortization expense was $7,009, $5,176 and $4,334 for the years ended December 31, 2020, 2019 and 2018, respectively.