Condensed Consolidated Statements of Earnings - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Interest income:
Loans and leases	$ 241,544	$ 242,198	$ 262,278
Investment securities	30,265	28,843	27,446
Deposits in financial institutions	1,528	1,135	1,608
Total interest income	273,337	272,176	291,332
Interest expense:
Deposits	7,500	8,454	28,247
Borrowings	193	37	6,778
Subordinated debentures	4,375	4,477	6,560
Total interest expense	12,068	12,968	41,585
Net interest income	261,269	259,208	249,747
Provision for credit losses	(48,000)	10,000	112,000
Net interest income after provision for credit losses	309,269	249,208	137,747
Noninterest income:
Leased equipment income	9,158	9,974	9,721
Other commissions and fees	11,354	9,440	12,251
Service charges on deposit accounts	2,934	3,119	2,658
Gain on sale of loans and leases	139	1,671	87
Gain on sale of securities	101	4	182
Other income	21,143	15,642	4,201
Total noninterest income	44,829	39,850	29,100
Noninterest expense:
Compensation	79,882	73,171	61,282
Occupancy	14,054	14,083	14,207
Leased equipment depreciation	6,957	6,718	6,454
Data processing	8,969	7,501	7,205
Other professional services	3,079	3,172	3,948
Insurance and assessments	5,126	6,800	4,258
Customer related expense	4,903	5,064	4,249
Acquisition, integration and reorganization costs	4,818	4,430	3,932
Loan expense	3,193	3,926	2,650
Intangible asset amortization	3,425	1,060	0
Foreclosed assets expense (income), net	1	(272)	66
Goodwill impairment	0	0	1,470,000
Other expense	15,729	10,029	9,719
Total noninterest expense	150,136	135,682	1,587,970
Earnings (loss) before income taxes	203,962	153,376	(1,421,123)
Income tax expense	(53,556)	(36,546)	(11,988)
Net earnings (loss)	$ 150,406	$ 116,830	$ (1,433,111)
Earnings (loss) per share:
Basic (usd per share)	$ 1.27	$ 0.99	$ (12.23)
Diluted (usd per share)	$ 1.27	$ 0.99	$ (12.23)