Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Operating Activities:
Net income	$ 43,490	$ 12,332
Adjustment to reconcile net income to net cash provided by operating activities:
Provision for credit losses	16,000	85,719
Depreciation and amortization	13,540	14,789
Deferred taxes	0	(267)
Amortization of intangibles	1,504	1,687
Amortization of debt securities premium and discount, net	6,562	13,936
Share-based compensation expense	1,524	1,285
Security gains, net	(251)	(10,062)
Net deferred loan origination expense	(4,085)	(4,384)
Excess tax benefit from exercise of stock options	0	(8)
Decrease in interest receivable	3,908	5,500
Decrease in interest payable	(1,483)	(2,988)
Realized gain on mortgages sold	(27,693)	(14,225)
Proceeds from mortgages sold	441,930	483,065
Origination of mortgages held for sale	(444,051)	(448,082)
Increase in bank-owned life insurance	(2,535)	(2,964)
Decrease (increase) in prepaid pension asset	2,587	(186)
Decrease in prepaid deposit insurance assessments	8,985	11,040
Other, net	(2,071)	(1,035)
Net cash provided by operating activities	57,861	145,152
Investing activities:
Proceeds from calls and maturities of held-to-maturity securities	0	135,781
Proceeds from calls and maturities of available-for-sale securities	266,829	131,124
Proceeds from sales of available-for-sale securities	4,727	180,057
Purchases of held-to-maturity securities	0	(151,105)
Purchases of available-for-sale securities	(223,716)	(119,089)
Net decrease in short-term investments	0	150,000
Net decrease in loans and leases	136,920	20,141
Purchases of premises and equipment	(11,362)	(10,520)
Proceeds from sale of premises and equipment	968	1,693
Contingency earn-out payment	0	(1,200)
Other, net	(16)	(31)
Net cash provided by investing activities	174,350	336,851
Financing activities:
Net increase (decrease) in deposits	1,147	(181,558)
Net decrease in short-term debt and other liabilities	(11,950)	(16,526)
Repayment of long-term debt	0	(75,000)
Issuance of common stock	108,678	110
Excess tax benefit from exercise of stock options	0	8
Payment of cash dividends	(1,888)	(10,018)
Net cash provided by (used in) financing activities	95,987	(282,984)
Increase in cash and cash equivalents	328,198	199,019
Cash and cash equivalents at beginning of period	499,344	272,086
Cash and cash equivalents at end of period	$ 827,542	$ 471,105