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Share-based Payment Arrangements - Summary of Fair Value using Trinomial Tree Model and Inputs (Detail)
 12 Months Ended
Dec. 31, 2024
Years
$ / shares
Dec. 31, 2023
Years
$ / shares
USISH Two Thousand And Twenty Three Share Options Plan [Member]    
Disclosure of terms and conditions of share-based payment arrangement [Line Items]    
Share price at the grant date   $ 15.16
Exercise price   14.54
Trinomial Tree Model [member] | The Company Two Thousand And Twenty Three Share Options Plan [Member]    
Disclosure of terms and conditions of share-based payment arrangement [Line Items]    
Share price at the grant date $ 108  
Exercise price 107  
Binomial Method [Member] | Usish Employee Stock Ownership Plan Restricted Shares Two Thousand And Twenty Four [Member]    
Disclosure of terms and conditions of share-based payment arrangement [Line Items]    
Share price at the grant date   14.19
Exercise price 14.35  
Binomial Method [Member] | Usish Employee Stock Ownership Plan Restricted Shares Two Thousand And Twenty Three [Member]    
Disclosure of terms and conditions of share-based payment arrangement [Line Items]    
Share price at the grant date   $ 15.02
Exercise price $ 14.54  
Bottom of range [member] | USISH Two Thousand And Twenty Three Share Options Plan [Member]    
Disclosure of terms and conditions of share-based payment arrangement [Line Items]    
Expected volatility   38.51%
Expected lives | Years   2
Risk free interest rate   2.35%
Bottom of range [member] | Trinomial Tree Model [member] | The Company Two Thousand And Twenty Three Share Options Plan [Member]    
Disclosure of terms and conditions of share-based payment arrangement [Line Items]    
Expected volatility 31.02%  
Expected lives | Years 3.9  
Risk free interest rate 1.06%  
Bottom of range [member] | Binomial Method [Member] | Usish Employee Stock Ownership Plan Restricted Shares Two Thousand And Twenty Four [Member]    
Disclosure of terms and conditions of share-based payment arrangement [Line Items]    
Expected volatility 35.02%  
Lock-up periods | Years 1  
Risk free interest rate 2.11%  
Bottom of range [member] | Binomial Method [Member] | Usish Employee Stock Ownership Plan Restricted Shares Two Thousand And Twenty Three [Member]    
Disclosure of terms and conditions of share-based payment arrangement [Line Items]    
Expected volatility   36.56%
Lock-up periods | Years   1
Risk free interest rate   2.33%
Top of range [member] | USISH Two Thousand And Twenty Three Share Options Plan [Member]    
Disclosure of terms and conditions of share-based payment arrangement [Line Items]    
Expected volatility   39.09%
Expected lives   3
Risk free interest rate   2.45%
Top of range [member] | Trinomial Tree Model [member] | The Company Two Thousand And Twenty Three Share Options Plan [Member]    
Disclosure of terms and conditions of share-based payment arrangement [Line Items]    
Expected volatility 33.03%  
Expected lives | Years 6.1  
Risk free interest rate 1.12%  
Top of range [member] | Binomial Method [Member] | Usish Employee Stock Ownership Plan Restricted Shares Two Thousand And Twenty Four [Member]    
Disclosure of terms and conditions of share-based payment arrangement [Line Items]    
Expected volatility 37.02%  
Lock-up periods | Years 2  
Risk free interest rate 2.27%  
Top of range [member] | Binomial Method [Member] | Usish Employee Stock Ownership Plan Restricted Shares Two Thousand And Twenty Three [Member]    
Disclosure of terms and conditions of share-based payment arrangement [Line Items]    
Expected volatility   38.77%
Lock-up periods | Years   2
Risk free interest rate   2.44%