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Stock and Incentive Compensation Plans - Narrative (Details)
3 Months Ended 9 Months Ended
Aug. 01, 2022
shares
Sep. 30, 2025
USD ($)
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Sep. 30, 2024
USD ($)
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Sep. 30, 2025
USD ($)
category
shares
Sep. 30, 2024
USD ($)
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Apr. 30, 2024
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Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Stock compensation expense   $ 2,268,000 $ 2,186,000 $ 6,150,000 $ 5,953,000  
BTH | Common Stock            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Stock converted (in shares) | shares 611,676          
Employee Stock            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Maximum number of common stock available for issuance (in shares) | shares   1,000,000   1,000,000    
Shares available for issuance (in shares) | shares   812,472 871,040 812,472 871,040  
Stock repurchase program, discount percentage       15.00%    
Offering period       1 year    
Unrecognized compensation cost   $ 337,000   $ 337,000    
Unrecognized compensation cost weighted average period for recognition       8 months 12 days    
Stock compensation expense   127,000 $ 144,000 $ 371,000 $ 369,000  
PSU            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Unrecognized compensation cost   4,700,000   $ 4,700,000    
Unrecognized compensation cost weighted average period for recognition       10 months 24 days    
Target percentage       100.00%    
Performance period (in years)       3 years    
Expiration period       3 years    
Number of categories | category       2    
Stock compensation expense   907,000 782,000 $ 2,196,000 2,109,000  
PSU | Minimum            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Target percentage       0.00%    
PSU | Maximum            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Target percentage       150.00%    
RSUs            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Unrecognized compensation cost   10,600,000   $ 10,600,000    
Unrecognized compensation cost weighted average period for recognition       2 years 9 months 18 days    
RSUs | Minimum            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Service period in which time-vested awards are earned       1 year    
RSUs | Maximum            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Service period in which time-vested awards are earned       7 years    
RSAs            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Unrecognized compensation cost   273,000   $ 273,000    
Unrecognized compensation cost weighted average period for recognition       7 months 6 days    
RSAs | Minimum            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Service period in which time-vested awards are earned       1 year    
RSAs | Maximum            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Service period in which time-vested awards are earned       7 years    
Stock Options            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Stock compensation expense   $ 0 $ 0 $ 0 $ 0  
2012 Plan and the Omnibus Plan            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Maximum number of common stock available for issuance (in shares) | shares   1,375,000   1,375,000    
Omnibus Plan            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Maximum number of common stock available for issuance (in shares) | shares   315,324   315,324    
Shares available for issuance (in shares) | shares           675,000
2012 Plan            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Shares available for issuance (in shares) | shares           0