CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Interest income:
Interest and fees on loans	$ 63,589	$ 56,762	$ 186,839	$ 138,595
Interest and dividends on investment securities:
Taxable interest income	8,006	4,689	21,250	12,339
Non-taxable interest income	1,166	1,068	3,630	2,521
Total interest income	72,761	62,519	211,719	153,455
Interest expense:
Deposits	8,946	3,851	21,837	8,058
Federal funds purchased and securities sold under agreements to repurchase	426	291	1,139	618
Short-term borrowings	324	447	1,257	521
Long-term debt	245	141	622	421
Senior notes	400	400	1,199	562
Subordinated notes	792	799	2,379	1,098
Junior subordinated debt owed to unconsolidated trusts	854	649	2,383	1,857
Total interest expense	11,987	6,578	30,816	13,135
Net interest income	60,774	55,941	180,903	140,320
Provision for loan losses	758	1,494	4,024	2,494
Net interest income after provision for loan losses	60,016	54,447	176,879	137,826
Non-interest income:
Mortgage revenue	1,272	3,526	4,488	8,430
Security gains, net		290	160	1,143
Other income	2,406	1,730	6,896	4,774
Total non-interest income	21,853	20,837	67,141	60,913
Non-interest expense:
Salaries, wages and employee benefits	26,024	25,497	80,315	67,448
Net occupancy expense of premises	3,761	3,714	11,271	10,025
Furniture and equipment expenses	1,715	1,785	5,418	5,123
Data processing	4,016	5,113	12,391	11,348
Amortization of intangible assets	1,445	1,286	4,450	3,675
Other expense	8,968	9,544	30,429	23,707
Total non-interest expense	45,929	46,939	144,274	121,326
Income before income taxes	35,940	28,345	99,746	77,413
Income taxes	9,081	9,561	26,108	26,980
Net income	$ 26,859	$ 18,784	$ 73,638	$ 50,433
Basic earnings per common share (in dollars per share)	$ 0.55	$ 0.41	$ 1.51	$ 1.24
Diluted earnings per common share (in dollars per share)	0.55	0.41	1.50	1.23
Dividends declared per share of common stock (in dollars per share)	$ 0.20	$ 0.18	$ 0.60	$ 0.54
Trust fees
Non-interest income:
Non-interest income	$ 6,324	$ 5,071	$ 20,573	$ 17,088
Commissions and brokers fees, net
Non-interest income:
Non-interest income	881	766	2,860	2,239
Remittance processing
Non-interest income:
Non-interest income	3,630	2,877	10,588	8,581
Fees for customer services
Non-interest income:
Non-interest income	$ 7,340	$ 6,577	$ 21,576	$ 18,658