Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash Flows from Operating Activities
Net income	$ 29,064	$ 22,214
Adjustments to reconcile net income to net cash provided by/(used in) operating activities:
Provision (credit) for loan losses	(4,000)	6,000
Provision for losses on other real estate owned	2,740	1,979
Deferred tax liability	2,356	5,425
Depreciation	1,471	1,521
Net losses/(gains) on sale and transfer of other real estate owned	712	(3,605)
Net gains on sale of loans	(278)
Proceeds from sales of loans	25,140
Originations of loans held-for-sale	(24,836)
Increase in trading securities, net	(99,930)
Write-downs on venture capital investments	137	57
Gain on sales and calls of securities	(2,215)	(6,232)
Decrease in unrealized loss from interest rate swaps mark-to-market	(789)	(874)
Amortization/accretion of security premiums/discounts, net	1,314	1,236
Amortization of other intangible assets	1,491	1,498
Excess tax short-fall from share-based payment arrangements	565	234
Stock based compensation expense	546	463
(Decrease)/increase in deferred loan fees, net	(527)	207
Decrease in accrued interest receivable	682	1,858
Decrease/(increase) in other assets, net	38,001	(7,148)
Increase in other liabilities	2,316	298
Net cash (used in)/provided by operating activities	(26,040)	25,131
Cash Flows from Investing Activities
Decrease in short-term investments	19,900	36,360
(Increase)/decrease in securities purchased under agreements to resell	(50,000)	110,000
Purchase of investment securities available-for-sale	(116,807)	(7,768)
Proceeds from maturities and calls of investment securities available-for-sale	200,000
Proceeds from sale of investment securities available-for-sale	30,550	217,261
Purchase of mortgage-backed securities available-for-sale	(307,830)	(100,496)
Proceeds from repayment and sale of mortgage-backed securities available-for-sale	143,757	356,931
Purchase of investment securities held-to-maturity		(419,460)
Proceeds from maturities and calls of investment securities held-to-maturity	67,979	26,971
Redemptions of Federal Home Loan Bank stock	2,533	2,509
Net decrease/(increase) in loans	131,822	(47,686)
Purchase of premises and equipment	(905)	(1,069)
Proceeds from sale of other real estate owned	10,186	16,064
Net increase in investment in affordable housing	(4,902)	(265)
Net cash provided by investing activities	126,283	189,352
Cash Flows from Financing Activities
Net increase in demand deposits, NOW accounts, money market and savings deposits	88,712	62,800
Net increase in time deposits	42,005	24,839
Net decrease in federal funds purchased and securities sold under agreements to repurchase		(102,000)
Advances from Federal Home Loan Bank	260,000	286,000
Repayment of Federal Home Loan Bank borrowings	(485,000)	(486,000)
Dividends paid on common stock	(787)	(786)
Dividends paid on preferred stock	(3,225)	(3,225)
Proceeds from other borrowings		2,526
Repayment of other borrowings	(879)
Proceeds from shares issued under Dividend Reinvestment Plan	67	54
Proceeds from exercise of stock options	647	1,307
Excess tax short-fall from share-based payment arrangements	(565)	(234)
Net cash used in financing activities	(99,025)	(214,719)
Increase/(decrease) in cash and cash equivalents	1,218	(236)
Cash and cash equivalents, beginning of the period	117,888	87,347
Cash and cash equivalents, end of the period	119,106	87,111
Cash paid during the period:
Interest	30,699	40,765
Income taxes (refunded)/paid	(20,424)	21,600
Non-cash investing and financing activities:
Net change in unrealized holding (loss)/gain on securities available-for-sale, net of tax	4,195	(3,571)
Transfers to other real estate owned from loans held for investment	8,338	14,035
Transfers to other real estate owned from loans held for sale		2,874
Loans transferred from held for investment to held for sale	15,986	2,388
Loans to facilitate the sale of other real estate owned		$ 4,625