Consolidated Statements Of Cash Flow - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Operating Activities
Net income/(loss)		$ 58,388	$ 52,213
Adjustments to reconcile net income/(loss) to net cash provided/(used) by operating activities:
Provision/(provision credit) for loan losses		(1,000)	3,000
Provision/(benefit) for deferred income taxes		6,920	4,293
Depreciation and amortization of premises and equipment		8,151	8,122
Amortization of intangible assets		1,232	1,300
Net other amortization and accretion		6,207	4,730
Net (increase)/decrease in derivatives		(16,864)	(321)
Repurchase and foreclosure provision/(provision credit)		(238)	0
(Gains)/losses and write-downs on other real estate, net		156	(162)
Litigation and regulatory matters		(294)	(375)
Stock-based compensation expense		5,029	3,941
Equity securities (gains)/losses, net		(44)	80
Debt securities (gains)/losses, net		0	(1,654)
Net (gains)/losses on sale/disposal of fixed assets		36	3,684
Loans held-for-sale:
Purchases and originations		(47,445)	(148)
Gross proceeds from settlements and sales		54,046	10,311
(Gain)/loss due to fair value adjustments and other		(809)	(91)
Net (increase)/decrease in:
Trading securities		(270,495)	(346,558)
Fixed income receivables		(110,904)	(51,194)
Interest receivable		1,055	(8,352)
Other assets		16,873	19,223
Net increase/(decrease) in:
Trading liabilities		286,342	172,634
Fixed income payables		114	33,327
Interest payable		7,360	10,206
Other liabilities		(75,014)	(29,942)
Total adjustments		(129,586)	(163,946)
Net cash provided/(used) by operating activities		(71,198)	(111,733)
Available-for-sale securities:
Sales		44	961
Maturities		135,046	135,503
Purchases		(135,676)	(159,066)
Premises and equipment:
Sales		18	1,356
Purchases		(9,318)	(11,890)
Proceeds from sale of other real estate		2,135	10,518
Net (increase)/decrease in:
Loans		499,796	102,654
Interests retained from securitizations classified as trading securities		256	1,487
Interest-bearing cash		(1,046,563)	(349,084)
Net cash provided/(used) by investing activities		(554,262)	(267,561)
Common stock:
Stock options exercised		2,045	157
Cash dividends paid		(16,465)	(14,347)
Repurchase of shares	[1]	(2,016)	(75,763)
Cash dividends paid - preferred stock - noncontrolling interest		(2,852)	(2,820)
Cash dividends paid - Series A preferred stock		(1,550)	(1,550)
Term borrowings:
Payments/maturities		(3,306)	(6,155)
Net increase/(decrease) in:
Deposits		807,641	360,685
Short-term borrowings		40,176	170,193
Net cash provided/(used) by financing activities		823,673	430,400
Net increase/(decrease) in cash and cash equivalents		198,213	51,106
Cash and cash equivalents at beginning of period		1,037,794	1,031,063
Cash and cash equivalents at end of period		1,236,007	1,082,169
Supplemental Disclosures
Total interest paid		21,478	11,223
Total taxes paid		951	617
Total taxes refunded		8,166	2,281
Transfer from loans to other real estate owned		$ 1,198	$ 1,814

[1] 2016 include s $ 75.0 million repurchased under share repurchase programs.