Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Interest income
Interest and fees on loans	$ 1,265,522	$ 1,172,162	$ 834,969
Interest on taxable securities	61,518	59,002	34,656
Interest on nontaxable securities	1,338	1,335	1,176
Interest on deposits in other banks	49,906	47,936	23,008
Interest on federal funds sold	0	0	77
Total interest income	1,378,284	1,280,435	893,886
Interest expense
Interest on deposits	484,673	356,017	56,105
Interest on other borrowings	44,421	89,374	36,755
Total interest expense	529,094	445,391	92,860
Net interest income	849,190	835,044	801,026
Provision for loan losses	69,841	153,515	52,610
Provision for unfunded commitments	(11,048)	(10,853)	19,226
Provision for other credit losses	0	(6)	(139)
Provision for credit losses	58,793	142,656	71,697
Net interest income after provision for credit losses	790,397	692,388	729,329
Noninterest income
Service charges on deposit accounts	50,893	46,575	44,499
Mortgage banking activity	160,475	139,885	184,904
Other service charges, commissions and fees	4,758	4,401	3,875
Net gain (loss) on securities	12,304	(304)	203
Equipment finance activity	21,664	23,349	19,178
Other noninterest income	43,163	28,922	31,765
Total noninterest income	293,257	242,828	284,424
Noninterest expense
Salaries and employee benefits	347,641	320,110	319,719
Occupancy and equipment	48,784	51,450	51,361
Advertising and marketing	12,612	11,638	12,032
Amortization of intangible assets	17,189	18,244	19,744
Data processing and communications expenses	59,699	53,486	49,228
Legal and other professional fees	16,737	17,726	16,439
Credit resolution-related expenses	2,487	80	29
Merger and conversion charges	0	0	1,212
FDIC insurance	15,499	26,940	8,063
Loan servicing expenses	36,157	35,283	36,835
Other noninterest expenses	50,989	43,324	45,993
Total noninterest expense	607,794	578,281	560,655
Income before income tax expense	475,860	356,935	453,098
Income tax expense	117,175	87,830	106,558
Net income	$ 358,685	$ 269,105	$ 346,540
Basic earnings per common share (in dollars per share)	$ 5.21	$ 3.90	$ 5.01
Diluted earnings per common share (in dollars per share)	$ 5.19	$ 3.89	$ 4.99
Weighted average common shares outstanding
Basic (in shares)	68,808,830	68,977,453	69,193,591
Diluted (in shares)	69,061,832	69,104,158	69,419,721