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Share-Based Compensation - Summary of Fair Value of MRI EICP Options and Valuation Assumptions (Detail) - MRI EICP [Member]
12 Months Ended
Dec. 31, 2021
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Risk-free interest rate 0.50%
Expected volatility 32.00%
Expected option life 5 years 6 months
Grant-date fair value $ 3.44