Consolidated Statements of Cash Flows (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net income	$ 73,479	$ 60,373
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	8,077	7,959
Stock-based compensation	1,276	1,893
Provision for credit losses	30,188	25,049
Net amortization of premiums and accretion of discounts on securities and borrowings	5,102	5,858
Amortization of other intangible assets	3,758	4,145
Gains on securities transactions, net	(19,171)	(4,519)
Net impairment losses on securities recognized in earnings	825	4,642
Proceeds from sales of loans held for sale	173,081	159,479
Gains on sales of loans, net	(5,170)	(3,539)
Originations of loans held for sale	(137,338)	(137,786)
Gains on sales of assets, net	(203)	(304)
Change in FDIC loss-share receivable	(13,566)
Net change in:
Trading securities	9,793	345
Fair value of borrowings carried at fair value	(1,947)	1,847
Cash surrender value of bank owned life insurance	(3,586)	(3,311)
Accrued interest receivable	(305)	81
Other assets	25,298	29,414
Accrued expenses and other liabilities	(23,533)	7,821
Net cash provided by operating activities	126,058	159,447
Cash flows from investing activities:
Net loan (originations) repayments	(241,027)	335,225
Investment securities held to maturity:
Purchases	(272,825)	(504,364)
Maturities, calls and principal repayments	339,196	267,274
Investment securities available for sale:
Purchases	(366,123)	(244,010)
Sales	390,861	373,766
Maturities, calls and principal repayments	102,250	193,926
Death benefit proceeds from bank owned life insurance	1,169	773
Proceeds from sales of real estate property and equipment	3,946	41
Purchases of real estate property and equipment	(7,513)	(5,139)
Reimbursements from the FDIC	22,746
Cash and cash equivalents acquired in acquisitions		47,528
Net cash (used in) provided by investing activities	(27,320)	465,020
Cash flows from financing activities:
Net change in deposits	342,833	(781,064)
Net change in short-term borrowings	(21,258)	(44,193)
Repayments of long-term borrowings	(206,000)	(61,742)
Dividends paid to common shareholders	(58,151)	(57,214)
Common stock issued, net	4,215	4,530
Net cash provided by (used in) financing activities	61,639	(939,683)
Net change in cash and cash equivalents	160,377	(315,216)
Cash and cash equivalents at beginning of year	366,286	661,337
Cash and cash equivalents at end of period	526,663	346,121
Supplemental disclosures of cash flow information:
Interest on deposits and borrowings	100,522	109,961
Federal and state income taxes	28,741	37,876
Non-cash assets acquired:
Investment securities available for sale		73,743
Loans		412,331
Premises and equipment, net		123
Accrued interest receivable		2,787
FDIC loss-share receivable		108,000
Goodwill		19,497
Other intangible assets, net		1,560
Other assets		22,559
Total non-cash assets acquired		640,600
Liabilities assumed:
Deposits		654,200
Short-term borrowings		12,688
Long-term borrowings		10,559
Accrued expenses and other liabilities		10,681
Total liabilities assumed		688,128
Net non-cash assets acquired		(47,528)
Cash and cash equivalents acquired in acquisitions		$ 47,528