Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Interest income
Loans and lease financing	$ 144,406	$ 123,551
Available-for-sale securities	24,486	28,993
Other	3,669	2,392
Total interest income	172,561	154,936
Interest expense
Deposits	23,197	15,264
Short-term and long-term borrowings	4,275
Total interest expense	27,472	15,264
Net interest income	145,089	139,672
Provision for loan and lease losses	5,680	5,950
Net interest income after provision for loan and lease losses	139,409	133,722
Noninterest income
Service charges on deposit accounts	8,060	7,955
Credit and debit card fees	16,655	15,497
Other service charges and fees	9,129	9,342
Trust and investment services income	8,618	8,231
Bank-owned life insurance	3,813	2,044
Investment securities losses, net	(2,613)
Other	3,410	5,631
Total noninterest income	47,072	48,700
Noninterest expense
Salaries and employee benefits	44,860	42,160
Contracted services and professional fees	13,645	12,287
Occupancy	6,986	6,484
Equipment	4,284	4,588
Regulatory assessment and fees	1,447	3,973
Advertising and marketing	1,966	951
Card rewards program	6,732	5,718
Other	12,703	14,426
Total noninterest expense	92,623	90,587
Income before provision for income taxes	93,858	91,835
Provision for income taxes	23,934	23,877
Net income (loss)	$ 69,924	$ 67,958
Basic earnings per share (in dollars per share)	$ 0.52	$ 0.49
Diluted earnings per share (in dollars per share)	$ 0.52	$ 0.49
Basic weighted-average outstanding shares (in shares)	134,879,336	139,600,712
Diluted weighted-average outstanding shares (in shares)	135,198,345	139,732,100