Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Interest and Dividend Income
Loans receivable	$ 261,179	$ 166,094
Investment securities	11,764	4,828
Federal Home Loan Bank stock	304	261
Deposits with banks	12,139	763
Total interest and dividend income	285,386	171,946
Interest Expense
Time deposits	64,174	6,060
Other deposits	23,817	5,128
Advances from Federal Home Loan Bank	2,598	143
Long-term debt	1,443	1,424
Short-term debt	919	0
Total interest expense	92,951	12,755
Net interest income before provision for credit losses	192,435	159,191
Provision for credit losses	(8,100)	(8,643)
Net interest income after provision for credit losses	184,335	150,548
Non-Interest Income
Net gains from equity securities	4,853	5,974
Securities losses, net	(3,000)	0
Letters of credit commissions	1,570	1,556
Other operating income	5,092	6,677
Total non-interest income	14,244	20,232
Non-Interest Expense
Salaries and employee benefits	38,226	35,475
Occupancy expense	5,504	5,613
Computer and equipment expense	4,285	2,956
Professional services expense	7,406	6,697
Data processing service expense	3,724	2,909
FDIC and regulatory assessments	3,155	1,802
Marketing expense	774	947
Other real estate owned expense	50	71
Amortization of investments in low income housing and alternative energy partnerships	15,594	8,287
Amortization of core deposit intangibles	250	224
Acquisition, integration and restructuring costs	0	3,936
Other operating expense	4,218	3,780
Total non-interest expense	83,186	72,697
Income before income tax expense	115,393	98,083
Income tax expense	19,386	23,055
Net income	96,007	75,028
Other Comprehensive Income/(Loss), net of tax
Net holding gains/(losses) on securities available-for-sale	11,659	(45,966)
Net holding (losses)/gains on cash flow hedge derivatives	(441)	3,054
Total other comprehensive income/(loss), net of tax	11,218	(42,912)
Total other comprehensive income	$ 107,225	$ 32,116
Net Income Per Common Share:
Basic (in dollars per share)	$ 1.32	$ 1.00
Diluted (in dollars per share)	1.32	0.99
Cash dividends paid per common share (in dollars per share)	$ 0.34	$ 0.34
Average Common Shares Outstanding:
Basic (in shares)	72,533,239	75,331,976
Diluted (in shares)	72,899,662	75,719,375
Deposit Account [Member]
Non-Interest Income
Non-Interest Income	$ 1,832	$ 1,671
Asset Management [Member]
Non-Interest Income
Non-Interest Income	$ 3,897	$ 4,354