Consolidated Statements of Income and Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Interest Income:
Loans and leases	$ 380,337	$ 391,920	$ 1,154,133	$ 1,159,344
Securities and money market investments	37,712	62,631	128,033	195,133
Total interest income	418,049	454,551	1,282,166	1,354,477
Interest Expense:
Interest-bearing checking and money market accounts	9,328	42,465	47,951	140,396
Savings accounts	7,593	9,326	24,735	26,270
Certificates of deposit	44,481	86,934	189,270	235,360
Borrowed funds	74,761	79,911	227,985	237,521
Total interest expense	136,163	218,636	489,941	639,547
Net interest income	281,886	235,915	792,225	714,930
Provision for credit losses	13,016	4,781	51,192	5,403
Net interest income after provision for credit losses	268,870	231,134	741,033	709,527
Non-Interest Income:
Fee income	5,240	7,580	15,981	22,295
Bank-owned life insurance	7,566	6,791	24,458	20,245
Net (loss) gain on securities	(284)	275	1,137	7,755
Other	1,246	9,740	4,471	16,473
Total non-interest income	13,768	24,386	46,047	66,768
Operating expenses:
Compensation and benefits	73,182	75,159	228,338	229,172
Occupancy and equipment	23,960	21,748	63,011	66,599
General and administrative	31,366	26,395	86,273	89,350
Total non-interest expense	128,508	123,302	377,622	385,121
Income before income taxes	154,130	132,218	409,458	391,174
Income tax expense	38,360	33,172	88,013	97,305
Net income	115,770	99,046	321,445	293,869
Preferred stock dividends	8,207	8,207	24,621	24,621
Net income available to common shareholders	$ 107,563	$ 90,839	$ 296,824	$ 269,248
Basic earnings per common share	$ 0.23	$ 0.19	$ 0.63	$ 0.57
Diluted earnings per common share	$ 0.23	$ 0.19	$ 0.63	$ 0.57
Net income	$ 115,770	$ 99,046	$ 321,445	$ 293,869
Other comprehensive income, net of tax:
Change in net unrealized gain (loss) on securities available for sale, net of tax of ($444); $666; ($16,237) and ($22,434), respectively	1,170	(757)	42,809	58,256
Change in pension and post-retirement obligations, net of tax of ($18); ($2); ($54) and ($33), respectively	46	7	138	84
Change in net unrealized gain (loss) on cash flow hedges, net of tax of $520 and $16,212	(1,373)		(42,724)
Less: Reclassification adjustment for sales of available-for-sale securities, net of tax of ($14); $0; $188 and $1,527, respectively	37		(495)	(3,918)
Reclassification adjustment for defined benefit pension plan, net of tax of ($488); ($708); ($1,464) and ($2,098), respectively	1,287	1,814	3,861	5,380
Reclassification adjustment for net gain on cash flow hedges included in net income, net of tax of ($1,415) and ($1,642)	3,730		4,331
Total other comprehensive income, net of tax	4,897	1,064	7,920	59,802
Total comprehensive income, net of tax	$ 120,667	$ 100,110	$ 329,365	$ 353,671