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Business Combinations - Additional Information (Details)
$ in Thousands
 12 Months Ended
Jan. 01, 2020
USD ($)
Jan. 31, 2019
USD ($)
Dec. 31, 2021
USD ($)
property
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Business Acquisition [Line Items]          
Merger related expenses     $ 1,503 $ 15,947 $ 10,503
Weighted average useful life (years)     10 years    
Two River Bancorp Acquisition          
Business Acquisition [Line Items]          
Purchase accounting adjustments, assets $ 1,111,621        
Purchase accounting adjustments, loans 940,072        
Liabilities assumed, deposits 941,750        
Consideration paid 197,050        
Cash consideration paid for outstanding warrants and fractional shares 48,400        
Number of properties in lease agreements | property     14    
Core deposit intangible 12,130        
Country Bank Holding Company, Inc. Acquisition          
Business Acquisition [Line Items]          
Purchase accounting adjustments, assets 793,680        
Purchase accounting adjustments, loans 618,408        
Liabilities assumed, deposits 652,653        
Consideration paid 112,836        
Number of properties in lease agreements | property     5    
Core deposit intangible 2,117        
Capital Bank          
Business Acquisition [Line Items]          
Purchase accounting adjustments, assets   $ 494,416      
Purchase accounting adjustments, loans   307,300      
Liabilities assumed, deposits   449,018      
Consideration paid   76,834      
Cash consideration paid for outstanding warrants and fractional shares   353      
Number of properties in lease agreements | property     1    
Core deposit intangible $ 2,700 $ 2,662