Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash Flows from Operating Activities
Net income	$ 717	$ 19,393
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	6,899
Amortization of purchase accounting adjustments, net	(6,358)
(Reversal of) provision for credit losses	(3,377)	2,857
Noncash compensation expense	2,512	2,250
(Gain) loss on sale of assets	(47)
Gain on sale of available for sale investments	(2,328)
Gain on sale of OREO	(1,387)
Impairment of FDIC loss share receivables	31,813
Amortization of premium/discount on investments	5,600
Derivative losses (gains) on swaps	1
(Benefit) provision for deferred income taxes	123
Mortgage loans held for sale
Originations	(536,673)
Proceeds from sales	634,540
Gain on sale of loans, net	(18,429)
Cash retained from tax benefit associated with share-based payment arrangements	(330)
(Increase) decrease in other assets	(9,368)
Other operating activities, net	4,424
Net Cash Provided by Operating Activities	108,332
Cash Flows from Investing Activities
Proceeds from sales of securities available for sale	19,234
Proceeds from maturities, prepayments and calls of securities available for sale	288,650
Purchases of securities available for sale	(548,154)
Proceeds from maturities, prepayments and calls of securities held to maturity	8,724
Purchases of securities held to maturity	(2,412)
FDIC reimbursement of recoverable covered asset losses	37,903
Increase in loans receivable, net, excluding loans acquired	(101,684)
Proceeds from sale of premises and equipment	105
Purchases of premises and equipment	(6,019)
Proceeds from disposition of real estate owned	17,719
Investment in new market tax credit entities
Cash received in excess of cash paid for acquisition
Other investing activities, net	11,244
Net Cash Used in Investing Activities	(274,690)
Cash Flows from Financing Activities
(Decrease) increase in deposits, net of deposits acquired	(61,823)
Net change in short-term borrowings, net of borrowings acquired	(8,889)
Repayments of long-term debt	(99,617)
Dividends paid to shareholders	(10,027)
Proceeds from sale of treasury stock for stock options exercised	3,181	1,111
Payments to repurchase common stock	(1,258)
Cash retained from tax benefit associated with share-based payment arrangements	330	268
Net Cash (Used in) Provided by Financing Activities	(178,103)
Net (Decrease) Increase In Cash and Cash Equivalents	(344,461)
Cash and Cash Equivalents at Beginning of Period	970,977
Cash and Cash Equivalents at End of Period	626,516
Supplemental Schedule of Noncash Activities
Acquisition of real estate in settlement of loans	26,633
Transfers of property into Other Real Estate	26,633
Supplemental Disclosures
Interest on deposits and borrowings	13,739
Income taxes, net	3,127
Restated [Member]
Cash Flows from Operating Activities
Net income		19,393
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		4,919
Amortization of purchase accounting adjustments, net		(10,765)
(Reversal of) provision for credit losses		2,857
Noncash compensation expense		2,250
(Gain) loss on sale of assets		25
Gain on sale of available for sale investments		(2,800)
Gain on sale of OREO		(1,313)
Amortization of premium/discount on investments		4,874
(Benefit) provision for deferred income taxes		356
Mortgage loans held for sale
Originations		(450,644)
Proceeds from sales		489,095
Gain on sale of loans, net		(13,563)
Cash retained from tax benefit associated with share-based payment arrangements		(268)
(Increase) decrease in other assets		4,884
Other operating activities, net		5,627
Net Cash Provided by Operating Activities		54,927
Cash Flows from Investing Activities
Proceeds from sales of securities available for sale		81,793
Proceeds from maturities, prepayments and calls of securities available for sale		355,275
Purchases of securities available for sale		(448,487)
Proceeds from maturities, prepayments and calls of securities held to maturity		5,611
Purchases of securities held to maturity		(3,222)
FDIC reimbursement of recoverable covered asset losses		36,926
Increase in loans receivable, net, excluding loans acquired		(102,302)
Proceeds from sale of premises and equipment		309
Purchases of premises and equipment		(10,289)
Proceeds from disposition of real estate owned		28,484
Investment in new market tax credit entities
Cash received in excess of cash paid for acquisition
Other investing activities, net		8,224
Net Cash Used in Investing Activities		(47,678)
Cash Flows from Financing Activities
(Decrease) increase in deposits, net of deposits acquired		172,927
Net change in short-term borrowings, net of borrowings acquired		(129,054)
Proceeds from long-term debt		220
Repayments of long-term debt		(22,268)
Dividends paid to shareholders		(9,988)
Proceeds from sale of treasury stock for stock options exercised		1,111
Payments to repurchase common stock		(980)
Cash retained from tax benefit associated with share-based payment arrangements		268
Net Cash (Used in) Provided by Financing Activities		12,236
Net (Decrease) Increase In Cash and Cash Equivalents		19,485
Cash and Cash Equivalents at Beginning of Period		573,296
Cash and Cash Equivalents at End of Period		592,781
Supplemental Schedule of Noncash Activities
Acquisition of real estate in settlement of loans		31,338
Transfers of property into Other Real Estate		31,338
Supplemental Disclosures
Interest on deposits and borrowings		18,109
Income taxes, net		$ 2,504