Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Interest income
Loans and lease financing	$ 114,179	$ 105,701	$ 223,445	$ 210,058
Available-for-sale securities	25,059	19,453	51,488	36,012
Other	781	1,907	2,007	4,803
Total interest income	140,019	127,061	276,940	250,873
Interest expense
Deposits	8,760	6,541	16,330	12,970
Short-term borrowings and long-term debt	5	93	11	164
Total interest expense	8,765	6,634	16,341	13,134
Net interest income	131,254	120,427	260,599	237,739
Provision for loan and lease losses	4,400	1,900	8,900	2,600
Net interest income after provision for loan and lease losses	126,854	118,527	251,699	235,139
Noninterest income
Service charges on deposit accounts	9,412	9,395	18,967	19,184
Credit and debit card fees	14,157	13,810	28,636	27,629
Other service charges and fees	8,110	8,914	17,207	18,141
Trust and investment services income	7,526	7,323	14,864	14,728
Bank-owned life insurance	2,927	3,792	7,505	6,148
Investment securities gains, net		3		25,731
Other	6,738	3,134	11,098	8,329
Total noninterest income	48,870	46,371	98,277	119,890
Noninterest expense
Salaries and employee benefits	43,257	41,955	86,557	86,656
Contracted services and professional fees	12,388	9,939	22,696	22,694
Occupancy	5,023	4,809	10,344	10,121
Equipment	4,527	4,116	8,724	7,943
Regulatory assessment and fees	3,750	2,846	7,524	5,323
Advertising and marketing	1,222	1,425	3,250	3,049
Card rewards program	4,618	2,729	9,129	6,231
Other	10,456	10,654	21,356	21,520
Total noninterest expense	85,241	78,473	169,580	163,537
Income before provision for income taxes	90,483	86,425	180,396	191,492
Provision for income taxes	33,588	31,565	66,761	71,101
Net income	$ 56,895	$ 54,860	$ 113,635	$ 120,391
Basic earnings per share (in dollars per share)	$ 0.41	$ 0.39	$ 0.81	$ 0.86
Diluted earnings per share (in dollars per share)	0.41	0.39	0.81	0.86
Dividends declared per share (in dollars per share)	$ 0.22	$ 0.22	$ 0.44	$ 0.22
Basic weighted-average outstanding shares (in shares)	139,546,615	139,459,620	139,546,174	139,459,620
Diluted weighted-average outstanding shares (in shares)	139,646,117	139,459,620	139,644,557	139,459,620