Basis Of Presentation And Significant Accounting Policies (Narrative) (Details) (USD $)	6 Months Ended	12 Months Ended				12 Months Ended				12 Months Ended			12 Months Ended		12 Months Ended
	Jun. 30, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2011 Integra [Member]	Dec. 31, 2011 Building And Building Improvements [Member] years	Dec. 31, 2011 Furniture And Fixtures [Member] years	Dec. 31, 2011 Minimum [Member]	Jul. 29, 2011 Minimum [Member]	Dec. 31, 2011 Minimum [Member] Integra [Member]	Dec. 31, 2011 Maximum [Member]	Jul. 29, 2011 Maximum [Member]	Dec. 31, 2011 Maximum [Member] Integra [Member]	Dec. 31, 2011 OREO [Member]	Dec. 31, 2011 OREO [Member] Minimum [Member]	Dec. 31, 2011 OREO [Member] Maximum [Member]
Basis Of Presentation And Significant Accounting Policies [Line Items]
Number of days past due for a loan be placed on nonaccrual status		90
Loans on nonaccrual status		$ 250,000
Useful life for premises and equipment, minimum						15	3
Useful life for premises and equipment, maximum						39	10
Company owned life insurance		248,693,000	226,192,000
Other intangible assets estimated useful life, minimum (in years)		5						7
Other intangible assets estimated useful life, maximum (in years)		25									25
Impairment of intangibles				500,000
Foreclosed assets		37,600,000	5,600,000		30,400,000
Number of days that FDIC will cover losses on loans and accrued interest on loans		90
Loss sharing agreements amount, 80% on assets acquired					275,000,000									275,000,000
0% percent for losses on acquisition										275,000,000			467,200,000		275,000,000	467,200,000
80% reimbursement for loss on acquisition					467,200,000									467,200,000
Number of years for loss sharing provision for commercial and single family residential mortgage loans									5			10
Number of years, loss recovery provisions are in effect from acquisition date								8			10
Carrying value of the indemnification asset		147,566,000
Cash paid for interest		59,500,000	83,300,000	111,600,000
Income tax, net of refunds		4,600,000	2,000,000	2,700,000
Loans transferred to loans held for sale		5,400,000	3,200,000	2,600,000
Leases transferred from held for sale			51,400,000	370,200,000
Available-for-sale portfolio transferred to held-to-maturity portfolio, fair value	143,800,000		143,800,000	230,100,000
Common stock issued in the acquisition, Shares		1.90	7,600,000
Common stock issued in the acquisition, Value			$ 90,100,000