CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		3 Months Ended				9 Months Ended		12 Months Ended
		Sep. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Operating Activities
Net income/(loss)		$ 113,943	$ 103,405	$ 274,716	$ 94,994	$ 331,090	$ 455,702
Adjustments to reconcile net income/(loss) to net cash provided/(used) by operating activities:
Provision/(provision credit) for loan losses		15,000		2,000		37,000	1,000
Provision/(benefit) for deferred income taxes						69,102	106,314
Depreciation and amortization of premises and equipment						33,142	35,700
Amortization of intangible assets		6,206		6,460		18,628	19,394
Net other amortization and accretion						1,632	(9,991)
Net (increase)/decrease in derivatives						(183,852)	86,135
Fair value adjustment on interest-only strips						2,820	(840)
(Gains)/losses and write-downs on OREO, net						(64)	814
Litigation and regulatory matters						6,185	(1,447)
Stock-based compensation expense						16,478	17,465
Gain on sale and pay down of held-to-maturity loans						(1,105)	3,777
Equity securities (gains)/losses, net		(97)		(212,859)		(444)	(212,924)
Debt securities (gains)/losses, net						267	(52)
(Gain)/loss on extinguishment of debt		6		1		7	1
Net (gains)/losses on sale/disposal of fixed assets						20,453	(2,469)
(Gain)/loss on BOLI						(3,224)	(2,785)
Loans held-for-sale:
Purchases and originations						(1,488,577)	(1,729,549)
Gross proceeds from settlements and sales	[1]					581,137	751,589
(Gain)/loss due to fair value adjustments and other						(6,468)	13,755
Pension plan contribution						(509)	0
Net (increase)/decrease in:
Trading securities						1,077,025	392,411
Fixed income receivables						(170,871)	(109,109)
Interest receivable						3,111	(14,052)
Other assets						(40,256)	(6,699)
Net increase/(decrease) in:
Trading liabilities						384,397	101,179
Fixed income payables						57,270	(12,057)
Interest payable						15,935	16,610
Other liabilities						(43,737)	(30,717)
Total adjustments						385,482	(586,547)
Net cash provided/(used) by operating activities						716,572	(130,845)
Available-for-sale securities:
Sales						182,824	15,137
Maturities						566,803	510,232
Purchases						(357,182)	(362,215)
Proceeds from sale of equity investment						1,440	0
Premises and equipment:
Sales						14,370	22,794
Purchases						(28,769)	(32,928)
Proceeds from the sale of Visa Class B shares						0	240,206
Proceeds from sales of OREO						11,482	25,328
Proceeds from sale and pay down of loans classified as held-to-maturity						20,100	50,498
Proceeds from BOLI						10,085	11,559
Net (increase)/decrease in:
Loans						(3,779,972)
Loans							283,922
Interests retained from securitizations classified as trading securities						374	731
Interest-bearing cash						913,199	653,919
Cash paid related to divestitures						0	(27,599)
Cash paid/(received) for acquisitions, net						0	(46,017)
Net cash provided/(used) by investing activities						(2,445,246)	1,345,567
Common stock:
Stock options exercised						8,793	4,443
Cash dividends paid						(127,455)	(99,753)
Repurchase of shares	[2]					(134,041)	(23,997)
Cash dividends paid - preferred stock - noncontrolling interest						(8,555)	(8,555)
Cash dividends paid - Series A preferred stock						(4,650)	(4,650)
Term borrowings:
Payments/maturities						(2,581)	(17,565)
Increases in restricted and secured term borrowings						11,572	5,646
Net increase/(decrease) in:
Deposits						(738,333)	417,612
Short-term borrowings						2,814,279
Short-term borrowings							(1,496,739)
Net cash provided/(used) by financing activities						1,819,029	(1,223,558)
Net increase/(decrease) in cash and cash equivalents						90,355	(8,836)
Cash and cash equivalents at beginning of period			$ 1,405,325		$ 1,452,046	1,405,325	1,452,046	$ 1,452,046
Cash and cash equivalents at end of period		$ 1,495,680		$ 1,443,210		1,495,680	1,443,210	$ 1,405,325
Supplemental Disclosures
Total interest paid						303,180	208,160
Total taxes paid						32,811	12,779
Total taxes refunded						27,742	1,576
Transfer from loans to OREO						6,309	11,388
Transfer from loans HFS to trading securities						1,024,274	907,788
Transfer from loans to loans HFS						$ 31,465	$ 0

[1] 2018 includes $107.4 million related to the sale of approximately $120 million UPB of subprime auto loans. See Note 2- Acquisitions and Divestitures for additional information.

[2] 2019 and 2018 include $129.9 million and $19.0 million, respectively, repurchased under share repurchase programs.