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Derivative Financial Instruments - Information about Fair Values of Derivative Instruments in Consolidated Statement of Income (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]      
Derivatives not designated as hedging instruments, Derivatives $ (2,204) $ 13,707 $ 33,212
Interest Rate Swap Agreements [Member] | Fixed Rate Long-Term Borrowings [Member] | Derivatives Designated and Qualifying as Hedging Instruments [Member] | Fair Value Hedges [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivatives in fair value hedging relationships, Derivatives (58,599) 57,611 95,006
Derivatives in fair value hedging relationships, Hedged item 57,716 (57,686) (94,742)
Interest Rate Contracts [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivatives not designated as hedging instruments, Derivatives (11,268) 6,344 24,701
Foreign Exchange and Other Option and Futures Contracts [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivatives not designated as hedging instruments, Derivatives $ 9,064 $ 7,363 $ 8,511