Consolidated Statements Of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Interest income
Interest and fees on loans	$ 149,271	$ 140,543	$ 436,926	$ 409,424
Interest bearing deposits with banks	362	917	813	2,723
Federal funds sold and securities purchased under resale agreements	7	28	25	83
Securities	7,691	12,667	30,048	33,645
Trading account securities	3	15	22	38
Federal Home Loan Bank and Federal Reserve Bank stock	649	584	1,894	1,706
Brokerage customer receivables	218	197	650	557
Total interest income	158,201	154,951	470,378	448,176
Interest expense
Interest on deposits	16,794	21,893	52,097	68,253
Interest on Federal Home Loan Bank advances	2,817	4,166	9,268	12,134
Interest on notes payable and other borrowings	2,024	2,874	7,400	8,219
Interest on secured borrowings-owed to securitization investors	795	3,003	5,087	9,037
Interest on subordinated notes	67	168	362	574
Interest on junior subordinated debentures	3,129	4,437	9,424	13,229
Total interest expense	25,626	36,541	83,638	111,446
Net interest income	132,575	118,410	386,740	336,730
Provision for credit losses	18,799	29,290	56,890	83,821
Net interest income after provision for credit losses	113,776	89,120	329,850	252,909
Non-interest income
Wealth management	13,252	11,994	39,046	32,831
Mortgage banking	31,127	14,469	75,268	38,917
Service charges on deposit accounts	4,235	4,085	12,437	10,990
Gains on available-for-sale securities, net	409	225	2,334	1,483
Business Combination, Bargain Purchase, Gain Recognized, Amount	6,633	27,390	7,418	37,974
Trading (losses) gains, net	(998)	591	(1,780)	121
Other	8,287	8,493	26,180	22,470
Total non-interest income	62,945	67,247	160,903	144,786
Non-interest expense
Salaries and employee benefits	75,280	61,863	212,449	171,041
Equipment	5,888	4,501	16,754	13,174
Occupancy, net	8,024	7,512	23,814	20,789
Data processing	4,103	3,836	11,561	10,506
Advertising and marketing	2,528	2,119	6,713	5,173
Professional fees	4,653	5,085	12,104	13,164
Amortization of other intangible assets	1,078	970	3,216	2,363
FDIC insurance	3,549	3,100	10,383	10,899
OREO expenses, net	3,808	5,134	16,834	17,519
Other	15,637	12,201	45,664	37,008
Total non-interest expense	124,548	106,321	359,492	301,636
Income before taxes	52,173	50,046	131,261	96,059
Income tax expense	19,871	19,844	50,154	37,705
Net income	32,302	30,202	81,107	58,354
Preferred stock dividends and discount accretion	2,616	1,032	6,477	3,096
Net income applicable to common shares	$ 29,686	$ 29,170	$ 74,630	$ 55,258
Net income per common share-Basic	$ 0.82	$ 0.82	$ 2.06	$ 1.57
Net income per common share-Diluted	$ 0.66	$ 0.65	$ 1.70	$ 1.26
Cash dividends declared per common share	$ 0.09	$ 0.09	$ 0.18	$ 0.18
Weighted average common shares outstanding	36,381	35,550	36,305	35,152
Dilutive potential common shares	12,295	10,551	11,292	8,683
Average common shares and dilutive common shares	48,676	46,101	47,597	43,835