Deposit Accounts (Tables)

12 Months Ended

Dec. 31, 2021

Deposits Liabilities [Abstract]

Schedule of components of deposit accounts and weighted average interest rates

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

	2021				2020
(Dollars in thousands)	Amount		Weighted Average Interest Rate		Amount		Weighted Average Interest Rate
Noninterest-bearing checking	$	6,757,259	—	%	$	6,011,106	—	%
Interest-bearing checking	3,493,331		0.02		2,913,260		0.06
Money market	5,387,168		0.07		5,302,073		0.23
Savings	419,558		0.02		360,896		0.09
Certificates of deposit accounts
$250,000 or less	565,272		0.29		800,957		0.88
Greater than $250,000	493,001		0.19		825,885		0.88
Total certificates of deposit accounts	1,058,273		0.24	%	1,626,842		0.88	%
Total deposits	$	17,115,589	0.04	%	$	16,214,177	0.18	%

Schedule of aggregate annual maturities of certificates of deposit accounts

The aggregate annual maturities of certificates of deposit accounts at December 31, 2021 are as follows:

	2021
(Dollars in thousands)	Amount		Weighted Average Interest Rate
Within 3 months	$	487,590	0.14	%
4 to 6 months	281,440		0.39
7 to 12 months	214,639		0.19
13 to 24 months	58,101		0.45
25 to 36 months	8,813		0.90
37 to 60 months	7,685		0.60
Over 60 months	5		0.24
Total	$	1,058,273	0.24	%

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)	2021		2020		2019
Checking accounts	$	1,270	$	3,295	$	2,340
Money market accounts	6,824		19,903		28,279
Savings	251		393		382
Certificates of deposit accounts	3,472		10,745		27,296
Total	$	11,817	$	34,336	$	58,297