Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Interest income:
Interest and fees on loans	$ 180,464	$ 158,423
Interest on investment securities available-for-sale	25,635	24,474
Interest on investment securities held-to-maturity	197	197
Interest on loans held-for-sale	1,283	1,261
Interest on trading securities	6,353	7,751
Interest on other earning assets	4,879	1,558
Total interest income	218,811	193,664
Interest on deposits:
Savings	9,210	4,190
Time deposits	2,833	2,323
Other interest-bearing deposits	4,143	2,304
Interest on trading liabilities	3,781	4,039
Interest on short-term borrowings	1,392	1,128
Interest on term borrowings	7,744	7,606
Total interest expense	29,103	21,590
Net interest income	189,708	172,074
Provision/(provision credit) for loan losses	(1,000)	3,000
Net interest income after provision/(provision credit) for loan losses	190,708	169,074
Noninterest income:
Fixed income	50,678	66,977
Deposit transactions and cash management	24,565	26,837
Brokerage, management fees and commissions	11,906	10,415
Trust services and investment management	6,653	6,565
Bankcard income	5,455	5,259
Bank-owned life insurance	3,247	3,389
Debt secutities gains/(losses), net (Note 3 and Note 8)	44	1,654
Equity securities gains/(losses), net (Note 3)	0	(80)
All other income and commissions (Note 7)	14,391	13,289
Total noninterest income	116,939	134,305
Adjusted gross income after provision/(provision credit) for loan losses	307,647	303,379
Noninterest expense:
Employee compensation, incentives, and benefits	134,932	137,151
Occupancy	12,340	12,604
Operations services	10,875	9,900
Computer software	10,799	11,587
Equipment rentals, depreciation, and maintenance	6,351	6,159
FDIC premium expense	5,739	4,921
Legal fees	5,283	4,879
Professional fees	4,746	5,199
Advertising and public relations	4,601	4,973
Communications and courier	3,800	3,750
Contract employment and outsourcing	2,958	2,425
Amortization of intangible assets	1,232	1,300
Repurchase and foreclosure provision/(provision credit)	(238)	0
All other expense (Note 7)	18,787	22,079
Total noninterest expense	222,205	226,927
Income/(loss) before income taxes	85,442	76,452
Provision/(benefit) for income taxes	27,054	24,239
Net income/(loss)	58,388	52,213
Net income attributable to noncontrolling interest	2,820	2,851
Net income/(loss) attributable to controlling interest	55,568	49,362
Preferred stock dividends	1,550	1,550
Net income/(loss) available to common shareholders	$ 54,018	$ 47,812
Basic earnings/(loss) per share (Note 9)	$ 0.23	$ 0.2
Diluted earnings/(loss) per share (Note 9)	$ 0.23	$ 0.2
Weighted average common shares (Note 9)	233,076	234,651
Diluted average common shares (Note 9)	236,855	236,666
Cash dividends declared per common share	$ 0.09	$ 0.07