Deposit Accounts (Tables)

12 Months Ended

Dec. 31, 2022

Deposits Liabilities [Abstract]

Schedule of Components of Deposit Accounts and Weighted Average Interest Rates

Deposit accounts and the end-of-period weighted average interest rates paid consisted of the following at December 31:

	2022						2021
(Dollars in thousands)	Amount		% of Total Deposits		Weighted Average Interest Rate		Amount		% of Total Deposits		Weighted Average Interest Rate
Noninterest-bearing checking	$	6,306,825	36.4	%	—	%	$	6,757,259	39.4	%	—	%
Interest-bearing checking	3,119,850		18.0	%	0.63	%	3,493,331		20.4	%	0.02	%
Money market	4,946,019		28.5	%	0.85	%	5,387,168		31.5	%	0.07	%
Savings	476,588		2.7	%	0.49	%	419,558		2.5	%	0.02	%
Total transaction accounts	14,849,282		85.6	%	0.43	%	16,057,316		93.8	%	0.03	%
Time deposit accounts
$250,000 or less	525,299		3.00	%	1.35	%	565,272		3.3	%	0.29	%
Greater than $250,000	1,977,820		11.4	%	3.37	%	493,001		2.9	%	0.19	%
Total time deposit accounts	2,503,119		14.4	%	2.95	%	1,058,273		6.2	%	0.24	%
Total deposits	$	17,352,401	100.0	%	0.79	%	$	17,115,589	100.0	%	0.04	%

Schedule of Aggregate Annual Maturities of Certificates of Deposit Accounts

The aggregate annual maturities of certificates of deposit accounts at December 31, 2022 are as follows:

	2022
(Dollars in thousands)	Amount		Weighted Average Interest Rate
Within 3 months	$	488,062	2.13	%
4 to 6 months	529,373		2.62	%
7 to 12 months	876,046		3.45	%
13 to 24 months	519,884		3.55	%
25 to 36 months	6,912		0.61	%
37 to 60 months	7,262		0.27	%
Over 60 months	75,580		1.04	%
Total	$	2,503,119	2.95	%

Schedule of Interest Expense on Deposit Accounts

Interest expense on deposit accounts for the years ended December 31 is summarized as follows:

(Dollars in thousands)	2022		2021		2020
Checking accounts	$	6,351	$	1,270	$	3,295
Money market accounts	12,735		6,824		19,903
Savings	391		251		393
Certificates of deposit accounts	20,616		3,472		10,745
Total	$	40,093	$	11,817	$	34,336