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Commitments and Contingencies - Additional Information (Details) - USD ($)
3 Months Ended
Mar. 31, 2021
Aug. 31, 2020
Jul. 31, 2020
Commitments And Contingencies [Line Items]      
General amount of guarantee (as a percent) 2.00%    
Amount outstanding $ 243,280,000    
Standby Letters of Credit | APC      
Commitments And Contingencies [Line Items]      
Amount outstanding 300,000    
Standby Letters of Credit      
Commitments And Contingencies [Line Items]      
Amount outstanding 0    
Standby Letters of Credit | APAACO | Preferred Bank      
Commitments And Contingencies [Line Items]      
Maximum loan availability   $ 14,800,000 $ 14,800,000
Standby Letters of Credit | APC      
Commitments And Contingencies [Line Items]      
Maximum loan availability 300,000    
Standby Letters of Credit | Alpha Care Medical Group, Inc.      
Commitments And Contingencies [Line Items]      
Standby letters of credit assumed 3,800,000    
Standby Letters of Credit | Alpha Care Medical Group, Inc. | Preferred Bank      
Commitments And Contingencies [Line Items]      
Maximum loan availability $ 3,800,000