CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Cash flows from operating activities:
Net income	$ 106,798	$ 108,836
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	13,463	12,067
Stock-based compensation	3,816	2,535
Provision for credit losses	20,352	37,971
Net amortization of premiums and accretion of discounts on securities and borrowings	15,333	7,636
Amortization of other intangible assets	7,186	7,109
Gains on securities transactions, net	(2,543)	(20,034)
Net impairment losses on securities recognized in earnings	5,247	825
Proceeds from sales of loans held for sale	598,885	274,032
Gains on sales of loans, net	(31,362)	(8,060)
Originations of loans held for sale	(568,330)	(241,364)
Gains on sales of assets, net	(483)	(382)
Net change in:
FDIC loss-share receivable (excluding reimbursements)	7,502	(11,989)
Trading securities	(166)	10,448
Fair value of borrowings carried at fair value	(461)	(2,587)
Cash surrender value of bank owned life insurance	(5,265)	(5,575)
Accrued interest receivable	2,273	(3,390)
Other assets	100,700	12,217
Accrued expenses and other liabilities	(38,475)	(173)
Net cash provided by operating activities	234,470	180,122
Cash flows from investing activities:
Net loan originations	(305,713)	(261,066)
Loans purchased	(129,659)
Investment securities held to maturity:
Purchases	(258,764)	(592,138)
Maturities, calls and principal repayments	582,651	427,307
Investment securities available for sale:
Purchases	(229,037)	(463,655)
Sales	221,603	517,244
Maturities, calls and principal repayments	196,082	200,588
Death benefit proceeds from bank owned life insurance	1,689	5,389
Proceeds from sales of real estate property and equipment	5,749	4,495
Purchases of real estate property and equipment	(15,210)	(11,946)
Reimbursements from the FDIC under loss-sharing agreements	14,950	22,746
Cash and cash equivalents acquired in acquisition	117,587
Net cash provided by (used in) investing activities	201,928	(151,036)
Cash flows from financing activities:
Net change in deposits	(132,595)	256,725
Net change in short-term borrowings	47,016	30,256
Repayments of long-term borrowings	(27,000)	(206,000)
Redemption of junior subordinated debentures	(10,000)
Dividends paid to common shareholders	(93,785)	(87,450)
Common stock issued, net	6,176	6,325
Net cash used in financing activities	(210,188)	(144)
Net change in cash and cash equivalents	226,210	28,942
Cash and cash equivalents at beginning of year	379,049	366,286	366,286
Cash and cash equivalents at end of period	605,259	395,228	379,049
Supplemental disclosures of cash flow information:
Interest on deposits and borrowings	137,138	150,640
Federal and state income taxes	49,936	28,741
Supplemental schedule of non-cash investing activities:
Transfer of loans to other real estate owned	11,831	7,934
Transfer of loans to loans held for sale	123,093
Non-cash assets acquired:
Investment securities available for sale	275,650
Loans	1,098,948
Premises and equipment, net	9,457
Accrued interest receivable	5,294
Goodwill	101,967
Other intangible assets, net	8,050
Other assets	67,715
Total non-cash assets acquired	1,567,081
Liabilities assumed:
Deposits	1,380,293
Short-term borrowings	29,000
Junior subordinated debentures issued to capital trusts	15,645
Other liabilities	51,312
Total liabilities assumed	1,476,250
Net non-cash assets acquired	90,831
Net cash and cash equivalents acquired	117,587
Common stock issued in acquisition	$ 208,418		$ 208,418