Basis Of Presentation And Significant Accounting Policies (Narrative) (Details) (USD $) Share data in Millions, unless otherwise specified	12 Months Ended					12 Months Ended								0 Months Ended		12 Months Ended			1 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Integra [Member]	Dec. 31, 2011 Integra [Member]	Dec. 31, 2012 Minimum [Member]	Dec. 31, 2012 Minimum [Member] Other Intangible Assets [Member]	Dec. 31, 2012 Minimum [Member] Building and Building Improvements [Member]	Dec. 31, 2012 Minimum [Member] Furniture and Equipment [Member]	Dec. 31, 2012 Maximum [Member]	Dec. 31, 2012 Maximum [Member] Other Intangible Assets [Member]	Dec. 31, 2012 Maximum [Member] Building and Building Improvements [Member]	Dec. 31, 2012 Maximum [Member] Furniture and Equipment [Member]	Sep. 15, 2012 Indiana Community Bancorp [Member]	Jan. 02, 2011 Monroe Bancorp [Member]	Dec. 31, 2011 Monroe Bancorp [Member]	Dec. 31, 2012 Losses Up To $275.0 [Member]	Jul. 31, 2011 Losses Up To $275.0 [Member]	Jul. 31, 2011 Losses In Excess Of $275.0 Up To $467.2 [Member]	Dec. 31, 2012 Losses In Excess Of $275.0 Up To $467.2 [Member]	Dec. 31, 2012 Losses In Excess Of $467.2 [Member]
Basis Of Presentation And Significant Accounting Policies [Line Items]
Number of days past due for a loan be placed on nonaccrual status	90 days
Historical loss experience, number of relevant years	3 years
Number of months required for current loans to return to accrual status	6 years
Maximum value of small commercial loans on nonaccrual status or 90 days delinquent	$ 250,000									$ 250,000
Days delinquent required for charge off	90 days
Useful lives for premises and equipment, years								15 years	3 years			39 years	10 years
Company-owned life insurance	270,629,000	248,693,000
Finite-Lived Intangible Asset, Useful Life						5 years	7 years			15 years	25 years
Amount of foreclosed assets	37,300,000	37,600,000
Covered other real estate owned from acquisition				26,100,000	30,400,000
Number of days that FDIC will cover losses on loans and accrued interest on loans	90 days
80% reimbursement for loss on acquisition																	80				80
Zero percent for losses on acquisition																			467,200,000	467,200,000
Loss sharing agreements amount, 80% on assets acquired																	275,000,000	275,000,000			467,200,000
Percentage covered up to $467.2 million	0.00%																			0.00%
Percentage covered in excess of $467.2 million																					80.00%
Number of years for loss sharing provisions for commercial mortgage loans	5 years
Number of years for loss sharing provisions for single family residential mortgage loans	10 years
Number of years loss recovery provisions are in effect from acquisition date	July 29, 2011
Number of years for loss recovery provisions for commercial mortgage loans	8 years
Number of years for loss recovery provisions for single family residential mortgage loans	10 years
Carrying value of the indemnification asset	115,700,000	167,700,000
Cash paid for interest	38,400,000	59,500,000	83,300,000
Cash paid for income taxes	24,200,000	4,600,000	(2,000,000)
Loans transferred to loans held-for-sale	1,700,000	5,400,000	3,200,000
Transfer of portfolio leases from held-for-sale			51,400,000
Transfer of securities from held-to-maturity portfolio to available-for-sale portfolio	46,100,000
Transfer of securities from available-for-sale to held-to-maturity portfolio			143,800,000
Number of shares issued in acquisition														6.6	7.6	7.6
Value of shares issued in acquisition														$ 88,500,000	$ 90,100,000	$ 90,100,000