Consolidated Statements Of Income - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Interest income:
Interest and fees on loans	$ 153,283,000	$ 142,710,000	$ 297,180,000	$ 281,367,000
Interest on investment securities available-for-sale	23,288,000	23,650,000	46,122,000	46,784,000
Interest on investment securities held-to-maturity	66,000	66,000	132,000	132,000
Interest on loans held-for-sale	1,350,000	3,209,000	2,841,000	6,424,000
Interest on trading securities	8,951,000	7,687,000	18,052,000	15,792,000
Interest on other earning assets	92,000	37,000	771,000	444,000
Total interest income	187,030,000	177,359,000	365,098,000	350,943,000
Interest on deposits:
Savings	2,970,000	2,792,000	6,277,000	5,875,000
Time deposits	1,324,000	2,486,000	2,756,000	5,548,000
Other interest-bearing deposits	1,104,000	746,000	2,061,000	1,564,000
Certificates of deposit $100,000 and more	830,000	869,000	1,712,000	1,892,000
Interest on trading liabilities	3,770,000	4,087,000	7,684,000	7,658,000
Interest on short-term borrowings	726,000	1,195,000	1,772,000	2,300,000
Interest on term borrowings	9,666,000	8,416,000	19,330,000	16,979,000
Total interest expense	20,390,000	20,591,000	41,592,000	41,816,000
Net interest income	166,640,000	156,768,000	323,506,000	309,127,000
Provision/(provision credit) for loan losses	2,000,000	5,000,000	7,000,000	15,000,000
Net interest income after provision for loan losses	164,640,000	151,768,000	316,506,000	294,127,000
Noninterest income:
Fixed income	56,241,000	47,680,000	117,860,000	104,520,000
Deposit transactions and cash management	28,430,000	27,911,000	54,981,000	54,367,000
Brokerage, management fees and commissions	12,456,000	12,843,000	23,855,000	25,119,000
Trust services and investment management	7,416,000	7,309,000	14,114,000	14,053,000
Bankcard income	5,884,000	7,919,000	11,070,000	12,439,000
Bank-owned life insurance	3,391,000	3,312,000	6,853,000	9,344,000
Other service charges	3,043,000	3,143,000	5,891,000	5,988,000
Insurance commissions	654,000	611,000	1,250,000	1,048,000
Mortgage banking	376,000	8,861,000	1,960,000	27,890,000
Equity securities gains/(losses), net	8,000	(1,923,000)	284,000	3,734,000
All other income and commissions (Note 7)	12,402,000	9,235,000	21,872,000	14,129,000
Total noninterest income	130,301,000	126,901,000	259,990,000	272,631,000
Adjusted gross income after provision for loan losses	294,941,000	278,669,000	576,496,000	566,758,000
Noninterest expense:
Employee compensation, incentives, and benefits (three and six months ended June 30, 2015 include $1.6 million and $3.4 million, respectively, and three and six months ended June 30, 2014 include $1.1 million and $1.7 million, respectively, of expense associated with pension and post-retirement plans reclassified from accumulated other comprehensive income)	127,970,000	119,659,000	259,414,000	238,888,000
Occupancy	11,764,000	11,944,000	23,982,000	29,536,000
Computer software	11,340,000	11,087,000	22,282,000	21,743,000
Operations services	10,033,000	8,804,000	19,370,000	17,786,000
Equipment rentals, depreciation, and maintenance	7,983,000	7,442,000	15,203,000	15,291,000
Professional fees	5,218,000	4,618,000	8,924,000	10,192,000
FDIC premium expense	4,952,000	1,136,000	8,400,000	5,127,000
Legal fees	4,509,000	1,533,000	8,060,000	10,998,000
Advertising and public relations	4,349,000	4,312,000	9,082,000	10,220,000
Communications and courier	3,801,000	3,948,000	7,677,000	8,172,000
Contract employment and outsourcing	3,337,000	5,318,000	7,921,000	9,643,000
Amortization of intangible assets	1,298,000	981,000	2,596,000	1,963,000
Foreclosed real estate	1,329,000	439,000	1,198,000	1,223,000
All other expense (Note 7)	20,511,000	(18,059,000)	200,506,000	424,000
Total noninterest expense	218,394,000	163,162,000	594,615,000	381,206,000
Income/(loss) before income taxes	76,547,000	115,507,000	(18,119,000)	185,552,000
Provision/(benefit) for income taxes (three and six months months ended June 30, 2015 include $.6 million and $1.3 million, respectively, and three and six months ended June 30, 2014 include $.4 million and $.7 million, respectively, of income tax benefit reclassified from accumulated other comprehensive income)	21,590,000	33,578,000	(671,000)	53,644,000
Net income/(loss)	54,957,000	81,929,000	(17,448,000)	131,908,000
Net income attributable to noncontrolling interest	2,851,000	2,859,000	5,609,000	5,672,000
Net income/(loss) attributable to controlling interest	52,106,000	79,070,000	(23,057,000)	126,236,000
Preferred stock dividends	1,550,000	1,550,000	3,100,000	3,100,000
Net income/(loss) available to common shareholders	$ 50,556,000	$ 77,520,000	$ (26,157,000)	$ 123,136,000
Basic earnings/(loss) per share (Note 9)	$ 0.22	$ 0.33	$ (0.11)	$ 0.52
Diluted earnings/(loss) per share Note 9)	$ 0.22	$ 0.33	$ (0.11)	$ 0.52
Weighted average common shares (Note 9)	232,800,000	235,797,000	232,808,000	235,492,000
Diluted average common shares (Note 9)	234,669,000	237,250,000	232,808,000	237,325,000
Cash dividends declared per common share	$ 0.06	$ 0.05	$ 0.12	$ 0.1