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
Loans and lease financing	$ 135,394	$ 118,986	$ 389,228	$ 342,431
Available-for-sale securities	25,196	24,195	81,586	75,683
Other	3,462	2,089	7,193	4,096
Total interest income	164,052	145,270	478,007	422,210
Interest expense
Deposits	20,205	11,949	52,824	28,279
Short-term and long-term borrowings	2,589	2	2,850	13
Total interest expense	22,794	11,951	55,674	28,292
Net interest income	141,258	133,319	422,333	393,918
Provision for loan and lease losses	4,460	4,500	16,430	13,400
Net interest income after provision for loan and lease losses	136,798	128,819	405,903	380,518
Noninterest income:
Service charges on deposit accounts	7,933	8,929	23,609	27,548
Credit and debit card fees	16,535	16,126	48,961	48,450
Other service charges and fees	9,578	8,510	28,553	25,717
Trust and investment services income	7,487	7,672	23,429	22,536
Bank-owned life insurance	3,692	3,119	8,131	10,624
Other	2,180	5,308	13,219	16,406
Total noninterest income	47,405	49,664	145,902	151,281
Noninterest expense:
Salaries and employee benefits	41,959	38,687	125,755	119,459
Contracted services and professional fees	11,478	10,834	36,770	33,530
Occupancy	6,757	6,238	20,149	17,382
Equipment	4,181	4,174	13,104	12,898
Regulatory assessment and fees	3,966	3,668	12,164	11,192
Advertising and marketing	1,060	2,005	3,126	5,255
Card rewards program	5,805	5,438	17,882	17,107
Other	17,941	13,740	46,649	40,881
Total noninterest expense	93,147	84,784	275,599	257,704
Income before provision for income taxes	91,056	93,699	276,206	274,095
Provision for income taxes	23,668	35,336	71,807	102,097
Net income	$ 67,388	$ 58,363	$ 204,399	$ 171,998
Basic earnings per share (in dollars per share)	$ 0.50	$ 0.42	$ 1.48	$ 1.23
Diluted earnings per share (in dollars per share)	0.50	0.42	1.48	1.23
Dividends declared per share (in dollars per share)	$ 0.24	$ 0.22	$ 0.72	$ 0.66
Basic weighted-average outstanding shares (in shares)	135,466,669	139,556,532	137,643,005	139,549,665
Diluted weighted-average outstanding shares (in shares)	135,675,498	139,696,330	137,809,573	139,670,487