Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Interest Income
Loans		$ 448,041		$ 428,197		$ 324,229
Taxable securities		69,864		55,969		38,659
Tax-exempt securities		10,735		12,201		11,045
Deposits in banks		1,312		702		813
Total interest income		529,952		497,069		374,746
Interest Expense
Deposits		22,146		12,105		4,800
FHLB advances		11,861		3,750		1,078
Subordinated debentures		1,871		1,871		304
Other borrowings		669		504		575
Total interest expense		36,547		18,230		6,757
Net Interest Income		493,405		478,839		367,989
Provision for loan and lease losses		3,493		14,769		8,631
Net interest income after provision for loan and lease losses		489,912		464,070		359,358
Noninterest Income
Deposit account and treasury management fees		35,695		36,072		30,381
Card revenue		15,198		19,719		25,627
Financial services and trust revenue		12,799		12,135		11,478
Loan revenue		13,465		11,866		12,399
Merchant processing revenue		0		0		4,283
Bank owned life insurance		6,294		6,007		5,380
Investment securities gains (losses), net		2,132		(89)		(11)
Gain on sale of merchant card services portfolio		0		0		14,000
Change in FDIC loss sharing asset		0		0		(447)
Other		11,598		2,546		6,552
Total noninterest income		97,181		88,256		109,642
Noninterest Expense
Compensation and employee benefits		212,867		200,199		169,674
Occupancy		35,176		36,576		32,407
Data processing		19,164		20,235		18,205
Legal and professional fees		21,645		18,044		15,151
Amortization of intangibles		10,479		12,236		6,333
Business and Occupation taxes	[1]	5,846		5,664		4,326
Advertising and promotion		4,925		5,584		4,466
Regulatory premiums		1,920		3,710		3,183
Merchant processing		0		0		2,196
Net cost (benefit) of operation of OREO		(692)		1,218		468
Other	[1]	34,152		37,024		34,608
Total noninterest expense		345,482		340,490		291,017
Income before income taxes		241,611		211,836		177,983
Income tax provision		47,160		38,954		65,155
Net Income		$ 194,451		$ 172,882		$ 112,828
Per Common Share
Basic earnings per common share		$ 2.68	[2]	$ 2.36	[2]	$ 1.86
Diluted earnings per common share		$ 2.68	[2]	$ 2.36	[2]	$ 1.86
Weighted average number of common shares outstanding		71,999		72,385		59,882
Weighted average number of diluted common shares outstanding		72,032		72,390		59,888

[1] Beginning January 1, 2019, B&O taxes are reported separately from other taxes, licenses and fees, which are now reported under “other noninterest expense.” Prior periods have been reclassified to conform to current period presentation.

[2] Due to averaging of shares, quarterly EPS may not add up to the totals reported for the full year.