Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash Flows from Operating Activities
Net income	$ 19,393	$ 14,647
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	4,919	2,875
Amortization of purchase accounting adjustments	(10,765)	(14,266)
Provision for loan losses	2,857	5,471
Noncash compensation expense	2,250	2,135
Loss on sale of assets	25	111
Gain on sale of investments	(2,800)	(1)
Gain on sale of OREO	(1,313)	(170)
Amortization of premium/discount on investments	4,874	4,877
Derivative losses (gains) on swaps		1
Provision (benefit) for deferred income taxes	356	(1,758)
Mortgage loans held for sale
Originations	(450,644)	(287,396)
Proceeds from sales	489,151	327,461
Gain on sale of loans, net	(13,619)	(8,892)
Cash retained from tax benefit associated with share-based payment arrangements	(268)	(289)
Decrease in other assets	4,200	4,918
Other operating activities, net	5,627	2,160
Net Cash Provided by Operating Activities	54,243	51,884
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	110,065
Purchases of securities available for sale	(448,487)	(92,326)
Proceeds from maturities, prepayments and calls of securities held to maturity	5,611	16,199
Purchases of securities held to maturity	(3,222)	(2,240)
FDIC reimbursement of recoverable covered asset losses	36,926	50,735
Increase in loans receivable, net	(101,618)	(72,086)
Proceeds from sale of premises and equipment	309	228
Purchases of premises and equipment	(10,289)	(26,029)
Proceeds from disposition of real estate owned	28,484	13,252
Other investing activities, net	8,224	1,001
Net Cash Used in Investing Activities	(46,994)	(1,201)
Cash Flows from Financing Activities
Increase (decrease) in deposits	172,927	(55,058)
Net change in short-term borrowings, net of borrowings acquired	(129,054)	(4,791)
Proceeds from long-term debt	220	492
Repayments of long-term debt	(22,268)	(29,249)
Dividends paid to shareholders	(9,988)	(9,137)
Proceeds from sale of treasury stock for stock options exercised	1,111	523
Payments to repurchase common stock	(980)	(1,012)
Cash retained from tax benefit associated with share-based payment arrangements	268	289
Net Cash Provided by (Used in) Financing Activities	12,236	(97,943)
Net Increase (Decrease) In Cash and Cash Equivalents	19,485	(47,260)
Cash and Cash Equivalents at Beginning of Period	573,296	337,778
Cash and Cash Equivalents at End of Period	592,781	290,518
Supplemental Schedule of Noncash Activities
Acquisition of real estate in settlement of loans	31,338	27,956
Transfers of property into Other Real Estate	31,338	27,956
Supplemental Disclosures
Interest on deposits and borrowings	18,109	21,828
Income taxes, net	$ 2,504	$ 12,232