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Commitments and Contingencies - Outstanding Commitments to Extend Credit (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Other Commitments [Line Items]
Total outstanding commitments	$ 1,105,425	$ 1,212,360
Commercial business
Other Commitments [Line Items]
Total outstanding commitments	661,902	637,053
Commercial business | Commercial and industrial
Other Commitments [Line Items]
Total outstanding commitments	640,018	584,287
Commercial business | Owner-occupied CRE
Other Commitments [Line Items]
Total outstanding commitments	3,488	17,193
Commercial business | Non-owner occupied CRE
Other Commitments [Line Items]
Total outstanding commitments	18,396	35,573
Real estate construction and land development
Other Commitments [Line Items]
Total outstanding commitments	180,274	305,409
Real estate construction and land development | Residential
Other Commitments [Line Items]
Total outstanding commitments	52,453	75,066
Real estate construction and land development | Commercial and multifamily
Other Commitments [Line Items]
Total outstanding commitments	127,821	230,343
Consumer
Other Commitments [Line Items]
Total outstanding commitments	$ 263,249	$ 269,898

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Unused amount of commitments to extend credit to customers.

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