Condensed Consolidated Statements Of Cash Flows (USD $)	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash Flows from Operating Activities
Net income/(loss)	$ 46,666,000	$ (23,517,000)
Adjustments to reconcile net income to net cash provided by/(used in) operating activities:
Provision for loan losses	16,000,000	129,000,000
Provision for losses on other real estate owned	4,315,000	6,189,000
Deferred tax liability/(benefit)	9,064,000	(20,403,000)
Depreciation	3,050,000	4,074,000
Net gains on sale and transfer of other real estate owned	(4,522,000)	(4,019,000)
Net gains on sale of loans held-for-sale	(1,259,000)	(149,000)
Proceeds from sale of loans held-for-sale	16,068,000	12,681,000
Originations of loans held-for-sale	(10,992,000)	(7,332,000)
Write-downs on loans held-for-sale		2,984,000
Write-downs on venture capital investments	57,000	199,000
Gain on sales and calls of securities	(11,410,000)	(8,695,000)
(Decrease)/increase in unrealized loss from interest rate swaps	(1,164,000)	5,180,000
Amortization/accretion of security premiums/discounts, net	1,952,000	2,375,000
Amortization of intangibles	2,983,000	3,031,000
Excess tax short-fall from share-based payment arrangements	271,000	99,000
Stock based compensation expense	871,000	1,915,000
Decrease in accrued interest receivable	3,451,000	465,000
(Increase)/decrease in other assets, net	(6,533,000)	7,384,000
Increase/(decrease) in other liabilities	8,346,000	(3,321,000)
Net cash provided by operating activities	77,214,000	108,140,000
Cash Flows from Investing Activities
Decrease/(increase) in short-term investments	110,261,000	(157,237,000)
Increase in securities purchased under agreements to resell	(145,000,000)
Purchase of investment securities available-for-sale	(56,758,000)	(2,116,683,000)
Proceeds from maturity and calls of investment securities available-for-sale	275,000,000	1,486,740,000
Proceeds from sale of investment securities available-for-sale	367,465,000	59,526,000
Purchase of mortgage-backed securities available-for-sale	(278,044,000)
Proceeds from repayment and sale of mortgage-backed securities available-for-sale	531,279,000	798,823,000
Purchase of investment securities held-to-maturity		(19,965,000)
Purchase of mortgage-backed securities held-to-maturity	(480,083,000)
Proceeds from maturity and call of investment securities held-to-maturity	47,321,000	20,141,000
Redemption of Federal Home Loan Bank stock	5,114,000	2,645,000
Net increase in loans	(124,993,000)	(37,368,000)
Purchase of premises and equipment	(1,670,000)	(2,181,000)
Proceeds from sale of other real estate owned	42,669,000	5,507,000
Net increase in investment in affordable housing	(704,000)	(2,818,000)
Net cash provided by investing activities	291,857,000	37,130,000
Cash Flows from Financing Activities
Net increase in demand deposits, NOW accounts, money market and savings deposits	20,013,000	119,735,000
Net increase/(decrease) in time deposits	97,600,000	(338,664,000)
Net decrease in federal funds purchased and securities sold under agreements to repurchase	(102,000,000)	(1,500,000)
Advances from Federal Home Loan Bank	1,043,001,000	174,000,000
Repayment of Federal Home Loan Bank borrowings	(1,390,501,000)	(239,000,000)
PaymentsOfDividendsCommonStock	(1,572,000)	(1,570,000)
Dividends paid on preferred stock	(6,450,000)	(6,751,000)
Issuance of common stock		124,922,000
Proceeds from other borrowings	10,931,000	1,139,000
Proceeds from shares issued under Dividend Reinvestment Plan	109,000	146,000
Proceeds from exercise of stock options	1,306,000
Excess tax short-fall from share-based payment arrangements	(271,000)	(99,000)
Net cash used in financing activities	(327,834,000)	(167,642,000)
Increase/(decrease) in cash and cash equivalents	41,237,000	(22,372,000)
Cash and cash equivalents, beginning of the period	87,347,000	100,124,000
Cash and cash equivalents, end of the period	128,584,000	77,752,000
Supplemental disclosure of cash flow information
Interest	76,718,000	104,582,000
Income taxes paid/(refund)	30,750,000	(6,942,000)
Non-cash investing and financing activities:
Net change in unrealized holding gain on securities available-for-sale, net of tax	5,403,000	25,106,000
Loans to facilitate sale of loans	6,094,000	23,500,000
Transfers to other real estate owned	41,502,000	50,208,000
Transfers to other real estate owned from loans held-for-sale	2,873,000	19,495,000
Loans transferred from investment to held for sale	4,025,000
Loans to facilitate the sale of other real estate owned	$ 6,825,000	$ 8,409,000