Deposits (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Balance:
Non-interest-bearing	$ 13,529,277	$ 14,179,980	$ 13,255,417
NOW and interest-bearing demand deposits	5,676,122	4,646,944	4,255,940
Wealth management deposits	2,988,195	2,612,759	2,300,818
Money market	12,538,489	12,840,432	12,148,541
Savings	3,988,790	3,846,681	3,861,296
Time certificates of deposit	4,076,318	3,968,789	4,130,546
Total deposits	$ 42,797,191	$ 42,095,585	$ 39,952,558
Mix:
Non-interest-bearing	32.00%	34.00%	33.00%
NOW and interest-bearing demand deposits	13.00%	11.00%	11.00%
Wealth management deposits	7.00%	6.00%	6.00%
Money market	29.00%	31.00%	30.00%
Savings	9.00%	9.00%	10.00%
Time certificates of deposit	10.00%	9.00%	10.00%
Total deposits	100.00%	100.00%	100.00%