Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash Flows from Operating Activities
Net income	$ 59,075	$ 46,666
Adjustments to reconcile net income to net cash provided by/(used in) operating activities:
Provision (credit) for loan losses	(9,000)	16,000
Provision for losses on other real estate owned	7,487	4,315
Deferred tax liability	99	9,064
Depreciation	2,954	3,050
Net losses/(gains) on sale and transfer of other real estate owned	732	(4,522)
Net gains on sale of loans	(613)	(1,259)
Proceeds from sales of loans	57,690	16,068
Originations of loans held-for-sale	(57,051)	(10,992)
Increase in trading securities, net	(99,893)
Write-downs on venture capital investments	187	57
Gain on sales and calls of securities	(4,589)	(11,410)
Decrease in unrealized loss from interest rate swaps mark-to-market	(1,892)	(1,164)
Amortization/accretion of security premiums/discounts, net	2,543	1,952
Amortization of other intangible assets	2,930	2,983
Excess tax short-fall from share-based payment arrangements	565	271
Stock based compensation expense	1,149	871
Stock issued to officers as compensation	113
Decrease/(increase) in deferred loan fees, net	406	(1)
Decrease in accrued interest receivable	2,679	3,451
Decrease/(increase) in other assets, net	43,839	(6,532)
(Decrease)/increase in other liabilities	(1,336)	8,346
Net cash provided by operating activities	8,074	77,214
Cash Flows from Investing Activities
(Increase)/decrease in short-term investments	(218,680)	110,261
Increase in securities purchased under agreements to resell	(10,000)	(145,000)
Purchase of investment securities available-for-sale	(176,708)	(56,758)
Proceeds from maturities and calls of investment securities available-for-sale	470,763	275,000
Proceeds from sale of investment securities available-for-sale	41,104	367,465
Purchase of mortgage-backed securities available-for-sale	(420,791)	(278,044)
Proceeds from repayment of mortgage-backed securities available-for-sale	46,127	60,868
Proceeds from sale of mortgage-backed securities available-for-sale	179,493	470,411
Purchase of mortgage-backed securities held-to-maturity		(480,083)
Proceeds from maturities and calls of investment securities held-to-maturity	131,961	47,321
Redemptions of Federal Home Loan Bank stock	5,023	5,114
Net increase in loans	(926)	(124,993)
Purchase of premises and equipment	(1,615)	(1,670)
Proceeds from sale of other real estate owned	21,698	42,669
Net increase in investment in affordable housing	(1,427)	(704)
Net cash provided by investing activities	66,022	291,857
Cash Flows from Financing Activities
Net increase in demand deposits, NOW accounts, money market and savings deposits	239,424	20,013
Net (decrease)/increase in time deposits	(84,176)	97,600
Net decrease in federal funds purchased and securities sold under agreements to repurchase		(102,000)
Advances from Federal Home Loan Bank	260,000	1,043,001
Repayment of Federal Home Loan Bank borrowings	(463,800)	(1,390,501)
Dividends paid on common stock	(1,574)	(1,572)
Dividends paid on preferred stock	(6,450)	(6,450)
Proceeds from other borrowings		10,931
Repayment of other borrowings	(880)
Proceeds from shares issued under Dividend Reinvestment Plan	134	109
Proceeds from exercise of stock options	647	1,306
Excess tax short-fall from share-based payment arrangements	(565)	(271)
Net cash used in financing activities	(57,240)	(327,834)
Increase in cash and cash equivalents	16,856	41,237
Cash and cash equivalents, beginning of the period	117,888	87,347
Cash and cash equivalents, end of the period	134,744	128,584
Cash paid during the period:
Interest	58,516	76,718
Income taxes (refunded)/paid	(2,717)	30,750
Non-cash investing and financing activities:
Net change in unrealized holding gain on securities available-for-sale, net of tax	5,044	5,403
Loans to facilitate sale of loans		6,094
Transfers to other real estate owned from loans held for investment	13,216	41,502
Transfers to other real estate owned from loans held for sale		2,873
Loans transferred from held for investment to held for sale	15,986	4,025
Loans to facilitate the sale of other real estate owned	$ 1,523	$ 6,825