Deposits (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Balance:
Non-interest-bearing	$ 11,236,083	$ 12,668,160	$ 13,748,918
NOW and interest-bearing demand deposits	5,576,558	5,591,986	5,089,724
Wealth management deposits	1,809,933	2,463,833	2,542,995
Money market	13,552,277	12,886,795	13,012,460
Savings	5,192,108	4,556,635	4,089,230
Time certificates of deposit	5,351,252	4,735,135	3,735,995
Total deposits	$ 42,718,211	$ 42,902,544	$ 42,219,322
Mix:
Non-interest-bearing	26.00%	30.00%	32.00%
NOW and interest-bearing demand deposits	13.00%	13.00%	12.00%
Wealth management deposits	4.00%	5.00%	6.00%
Money market	32.00%	30.00%	31.00%
Savings	12.00%	11.00%	10.00%
Time certificates of deposit	13.00%	11.00%	9.00%
Total deposits	100.00%	100.00%	100.00%