Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Operating Activities
Net income	$ 75,109	$ 75,444
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	48,773	110,271
Depreciation, amortization, and accretion, net	32,520	28,234
Deferred income tax expense	40,456	153
Decrease in interest receivable	4,476	8,006
Decrease in interest payable	(2,880)	(2,511)
(Increase) decrease in trading account assets	(11,967)	4,535
Originations of mortgage loans held for sale	(539,942)	(512,192)
Proceeds from sales of mortgage loans held for sale	621,951	552,708
Gain on sales of mortgage loans held for sale, net	(8,031)	(2,526)
Gain on sales of premises and equipment, net	(7)	0
Decrease in other assets	42,439	48,000
Decrease in accrued salaries and benefits	(15,480)	(4,544)
Decrease in other liabilities	(12,562)	(15,235)
Investment securities (gains), net	(1,448)	(24,253)
Losses (gains) on sales of other loans held for sale, net	79	(99)
Losses and write-downs on other real estate, net	14,314	33,859
Decrease (increase) in fair value of private equity investments, net	1,140	(7,372)
(Gains) on sales of other assets held for sale, net	(25)	(164)
Write-downs on other assets held for sale	170	1,228
Increase in accrual for Visa indemnification	801	4,713
Share-based compensation expense	3,350	4,510
Other, net	1,549	2,295
Net cash provided by operating activities	294,785	305,060
Investing Activities
Net cash received in acquisition	56,328	0
Net decrease (increase) in interest earning deposits with banks	3,428	(2,413)
Net decrease in federal funds sold and securities purchased under resale agreements	24,881	40,818
Net decrease in interest bearing funds with Federal Reserve Bank	49,813	265,762
Proceeds from maturities and principal collections of investment securities available for sale	392,737	584,914
Proceeds from sales of investment securities available for sale	347,386	733,621
Purchases of investment securities available for sale	(925,603)	(1,202,234)
Proceeds from sales of loans	74,885	177,510
Proceeds from sale of other real estate	49,535	70,496
Principal repayments by borrowers on other loans held for sale	334	4,133
Net (increase) in loans	(276,715)	(53,111)
Purchases of premises and equipment, net of disposals	(15,798)	(9,263)
Proceeds from disposals of premises and equipment	21	3,005
Proceeds from sale of other assets held for sale	918	1,740
Net cash (used in) provided by investing activities	(217,850)	614,978
Financing Activities
Net (decrease) increase in demand and savings deposits	(416,596)	280,925
Net (increase) decrease in certificates of deposit	13,428	(1,127,612)
Net increase in Federal funds purchased and securities sold under repurchase agreements	21,690	37,416
Principal repayments on long-term debt	(150,807)	(351,331)
Proceeds from issuance of long-term debt	311,732	293,370
Dividends paid to common shareholders	(16,981)	(15,730)
Dividends paid to preferred shareholders	(24,197)	(24,197)
Stock options exercised	134	0
Restricted stock activity	(1,481)	0
Net cash used in financing activities	(263,078)	(907,159)
(Decrease) increase in cash and cash equivalents	(186,143)	12,879
Cash and cash equivalents at beginning of period	614,630	510,423
Cash and cash equivalents at end of period	428,487	523,302
Supplemental Cash Flow Information
Income tax payments (refunds), net	1,437	(8,339)
Interest paid	56,214	78,235
Non-cash Investing Activities:
Decrease in net unrealized gains on available for sale securities, net of income taxes	(37,800)	(13,177)
Decrease (increase) in net unrealized gains on hedging instruments, net of income taxes	136	(1,555)
Mortgage loans held for sale transferred to loans at fair value	14,471	1,542
Loans foreclosed and transferred to other real estate	51,835	71,928
Loans transferred to other loans held for sale, at fair value	87,189	189,029
Other loans held for sale transferred to loans at fair value	1,235	0
Other loans held for sale foreclosed and transferred to other real estate at fair value	1,395	3,136
Premises and equipment transferred to other assets held for sale at fair value	202	2,402
Accretion of discount on Series A Preferred Stock	5,398	5,076
Amortization of post-retirement unfunded health benefit, net of income taxes	503	642
Settlement of prepaid common stock purchase contracts	122,848	0
Securities sold during the period but settled after period end	(15,899)	(2,636)
Fair value of assets assumed	536	0
Fair value of liabilities assumed	$ 56,864	$ 0