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Deposits (Detail) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Banking and Thrift, Other Disclosures [Abstract]    
Savings $ 1,490,624 $ 1,460,541
Money market 2,652,077 2,592,523
NOW 3,705,969 3,722,198
Non-interest bearing 2,825,762 2,766,235
Certificates of deposit 691,655 692,515
Total deposits $ 11,366,087 $ 11,234,012