XML 112 R93.htm IDEA: XBRL DOCUMENT v3.22.0.1
Borrowings - Narrative (Details)
1 Months Ended 12 Months Ended
Oct. 29, 2021
USD ($)
Oct. 31, 2020
USD ($)
Feb. 29, 2020
USD ($)
Dec. 31, 2021
USD ($)
trust
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Oct. 05, 2018
USD ($)
Debt Instrument [Line Items]                
Proceeds of issuance debt       $ 0 $ 147,374,000 $ 0    
Number of wholly-owned, unconsolidated subsidiary grantor trusts | trust       2        
FHLB                
Debt Instrument [Line Items]                
Net amounts available under the blanket floating lien       $ 982,200,000 456,900,000      
Line of credit | Federal Reserve Bank of Dallas                
Debt Instrument [Line Items]                
Current borrowing capacity       856,800,000 793,200,000      
Commercial and industrial loans pledged as collateral       1,090,000,000.00 999,700,000      
Line of credit outstanding, long-term       $ 0 $ 0      
FHLB advances | Minimum                
Debt Instrument [Line Items]                
Interest Rate       1.65% 1.65%      
FHLB advances | Maximum                
Debt Instrument [Line Items]                
Interest Rate       4.57% 5.72%      
Line of credit | Revolving credit loans                
Debt Instrument [Line Items]                
Maximum borrowing capacity $ 100,000,000           $ 50,000,000 $ 50,000,000
Line of credit outstanding, long-term       $ 0 $ 0      
Incremental revolving loan maximum $ 50,000,000              
Debt instrument, option to extend, term 364 days              
Line of credit | Revolving credit loans | SOFR                
Debt Instrument [Line Items]                
Basis spread on variable rate 3.35%              
Subordinated indebtedness, net                
Debt Instrument [Line Items]                
Interest Rate   4.50% 4.25%          
Basis spread on variable rate   4.32%            
Principal amount   $ 80,000,000 $ 70,000,000          
Term of floating rate   3 months            
Proceeds of issuance debt   $ 78,600,000            
Subordinated indebtedness, net | Origin Bank | Origin Bank                
Debt Instrument [Line Items]                
Principal amount         51,000,000      
Subordinated indebtedness, net | LIBOR                
Debt Instrument [Line Items]                
Basis spread on variable rate     2.82%          
Junior subordinated debt                
Debt Instrument [Line Items]                
Remaining purchase discount       3,400,000 3,600,000      
Line of credit                
Debt Instrument [Line Items]                
Maximum borrowing capacity       140,000,000 190,000,000      
Line of credit outstanding, short-term       0 0      
Amount held on deposit       250,000        
secured repurchase line of credit                
Debt Instrument [Line Items]                
Maximum borrowing capacity       $ 75,000,000 $ 75,000,000      
Overnight repurchase agreements with depositors                
Debt Instrument [Line Items]                
Daily average interest rate       0.08% 0.22%