Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Interest income
Interest and fees on loans	$ 171,242	$ 112,401
Interest on taxable securities	10,082	9,043
Interest on nontaxable securities	157	156
Interest on deposits in other banks and federal funds sold	1,287	3,329
Total interest income	182,768	124,929
Interest expense
Interest on deposits	24,102	21,684
Interest on other borrowings	10,721	3,850
Total interest expense	34,823	25,534
Net interest income	147,945	99,395
Provision for loan losses	37,047	3,408
Provision for unfunded commitments	4,000	0
Provision for credit losses	41,047	3,408
Net interest income after provision for credit losses	106,898	95,987
Noninterest income
Service charges on deposit accounts	11,844	11,646
Mortgage banking activity	35,333	14,677
Other service charges, commissions and fees	1,128	789
Net gain (loss) on securities	(9)	66
Other noninterest income	6,083	3,593
Total noninterest income	54,379	30,771
Noninterest expense
Salaries and employee benefits	75,946	38,332
Occupancy and equipment expense	12,028	8,204
Data processing and communications expenses	11,954	8,391
Credit resolution-related expenses	2,198	911
Advertising and marketing expense	2,358	1,741
Amortization of intangible assets	5,631	3,132
Merger and conversion charges	540	2,057
Other noninterest expenses	27,398	12,657
Total noninterest expense	138,053	75,425
Income before income tax expense	23,224	51,333
Income tax expense	3,902	11,428
Net income	19,322	39,905
Other comprehensive income
Net unrealized holding gains arising during period on investment securities available for sale, net of tax expense of $5,756 and $1,028	21,653	3,867
Reclassification adjustment for gains on investment securities included in earnings, net of tax of $0 and $(12)	0	(46)
Unrealized losses on cash flow hedges arising during period, net of tax benefit of $(26) and $(46)	(97)	(173)
Other comprehensive income	21,556	3,648
Total comprehensive income	$ 40,878	$ 43,553
Basic earnings per common share (in dollars per share)	$ 0.28	$ 0.84
Diluted earnings per common share (in dollars per share)	$ 0.28	$ 0.84
Weighted average common shares outstanding (in thousands)
Basic (in shares)	69,248	47,366
Diluted (in shares)	69,502	47,456