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Deposits (Tables)
 3 Months Ended
Mar. 31, 2022
Deposits [Abstract]  
Summary of Balances of Deposits A summary of the balances of deposits follows:
(in thousands)March 31,
2022		December 31,
2021
Noninterest-bearing demand$3,583,269 $2,979,882 
Interest-bearing demand1,788,639 1,568,682 
Savings2,993,873 2,520,959 
Time certificates, $250,000 or more57,126 44,652 
Other time certificates291,570 252,984 
Total deposits$8,714,477 $7,367,159