Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Interest income
Loans and lease financing	$ 574,013	$ 529,877	$ 462,675
Available-for-sale securities	92,505	107,123	102,272
Other	12,174	9,051	5,821
Total interest income	678,692	646,051	570,768
Interest expense
Deposits	87,865	72,976	41,944
Short-term and long-term borrowings	17,425	6,757	20
Total interest expense	105,290	79,733	41,964
Net interest income	573,402	566,318	528,804
Provision for loan and lease losses	13,800	22,180	18,500
Net interest income after provision for loan and lease losses	559,602	544,138	510,304
Noninterest income
Service charges on deposit accounts	33,778	32,036	35,807
Credit and debit card fees	66,749	65,716	64,049
Other service charges and fees	36,253	38,316	34,063
Trust and investment services income	35,102	31,324	30,485
Bank-owned life insurance	15,479	9,217	13,283
Investment securities losses, net	2,715
Other-than-temporary impairment (OTTI) losses on available-for-sale debt securities		(24,085)
Other	7,887	26,469	27,918
Total noninterest income	192,533	178,993	205,605
Noninterest expense
Salaries and employee benefits	173,098	167,162	163,086
Contracted services and professional fees	56,321	49,775	45,011
Occupancy	28,753	27,330	23,485
Equipment	17,343	17,714	17,247
Regulatory assessment and fees	7,390	14,217	14,907
Advertising and marketing	6,910	4,813	6,191
Card rewards program	29,961	24,860	23,363
Other	50,661	59,082	54,264
Total noninterest expense	370,437	364,953	347,554
Income before provision for income taxes	381,698	358,178	368,355
Provision for income taxes	97,306	93,784	184,673
Net income (loss)	$ 284,392	$ 264,394	$ 183,682
Basic earnings per share (in dollars per share)	$ 2.14	$ 1.93	$ 1.32
Diluted earnings per share (in dollars per share)	$ 2.13	$ 1.93	$ 1.32
Basic weighted-average outstanding shares (in shares)	133,076,489	136,945,134	139,560,305
Diluted weighted-average outstanding shares (in shares)	133,387,157	137,111,420	139,656,993