Consolidated Statements 0f Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Net income (loss)	$ 36,563	$ (9,684)	$ (25,750)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Provision for loan losses	80,582	147,349	215,672
Depreciation of premises, furniture, and equipment	10,995	11,397	10,917
Net amortization of premium on securities	10,314	2,404	1,527
Net gains on securities	(2,410)	(12,216)	(2,110)
Gains on FDIC-assisted transactions		(4,303)	(13,071)
Gains on early extinguishment of debt			(15,258)
Net losses on sales and write-downs of OREO	9,686	17,113	5,970
Net losses (gains) on sales of premises, furniture, and equipment	1,252	(92)	(6)
BOLI income	(2,231)	(1,560)	(2,263)
Net pension cost	3,911	872	4,076
Share-based compensation expense	6,362	5,638	3,516
Tax (expense) benefit related to share-based compensation	(179)	350	581
Deferred income taxes	2,160	(15,057)	(34,458)
Net amortization of other intangible assets	3,802	4,279	3,929
Originations and purchases of mortgage loans held-for-sale		(7,612)
Proceeds from sales of mortgage loans held-for-sale	236	8,531
Net decrease (increase) in trading account securities	813	(1,046)	(1,878)
Net decrease in accrued interest receivable	127	3,195	10,728
Net decrease in accrued interest payable	(633)	(1,531)	(6,047)
Net decrease (increase) in other assets	7,674	31,130	(22,945)
Net (decrease) increase in other liabilities	(1,903)	14,412	(48,589)
Net cash provided by operating activities	167,121	193,569	84,541
Proceeds from maturities, repayments, and calls of securities available-for-sale	271,511	257,934	314,601
Proceeds from sales of securities available-for-sale	188,556	390,217	855,405
Purchases of securities available-for-sale	(391,282)	(375,342)	(187,412)
Proceeds from maturities, repayments, and calls of securities held-to-maturity	83,113	70,194	80,511
Purchases of securities held-to-maturity	(62,251)	(62,326)	(80,335)
Redemption (purchase) of FHLB and Federal Reserve Bank stock	3,151	(2,301)
Net increase in loans	(14,297)	(23,957)	(113,088)
Proceeds from claims on BOLI	2,588	1,878	2,834
Proceeds from sales of OREO	37,731	56,480	19,331
Proceeds from sales of premises, furniture, and equipment	5,542	354	24
Purchases of premises, furniture, and equipment	(11,018)	(22,265)	(4,682)
Net cash proceeds received in FDIC-assisted transactions		122,329	28,585
Net cash provided by investing activities	113,344	413,195	915,774
Net cash proceeds received in acquisition of deposits	106,499
Net (decrease) increase in deposit accounts	(139,037)	80,076	67,164
Net (decrease) in borrowed funds	(98,603)	(411,466)	(1,022,029)
Proceeds (payments) for the issuance (retirement) of subordinated debt	114,387		(19,400)
Redemption of Preferred Shares and related Warrant	(193,910)
Proceeds from the issuance of Common Stock		196,035
Cash dividends paid	(12,838)	(12,422)	(12,423)
Restricted stock activity	(1,256)	(401)	(379)
Excess tax benefit (expense) related to share-based compensation	47	(189)	(177)
Net cash used in financing activities	(224,711)	(148,367)	(987,244)
Net increase in cash and cash equivalents	55,754	458,397	13,071
Cash and cash equivalents at beginning of year	585,776	127,379	114,308
Cash and cash equivalents at end of year	$ 641,530	$ 585,776	$ 127,379