Financing Activities (Narrative) (Details) (USD $)	12 Months Ended			0 Months Ended	12 Months Ended		0 Months Ended		0 Months Ended		12 Months Ended		12 Months Ended			12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Jan. 01, 2004	Dec. 15, 2010 ONB Capital Trust II [Member]	Dec. 31, 2011 ONB Capital Trust II [Member]	Apr. 30, 2002 ONB Capital Trust II [Member]	Oct. 07, 2011 Monroe Bancorp Capital Trust I [Member]	Jul. 31, 2006 Monroe Bancorp Capital Trust I [Member]	Jun. 15, 2012 Monroe Bancorp Statutory Trust II [Member]	Mar. 31, 2007 Monroe Bancorp Statutory Trust II [Member]	Dec. 31, 2011 St. Joseph Capital Trust I [Member]	Jul. 31, 2003 St. Joseph Capital Trust I [Member]	Dec. 31, 2011 St. Joseph Capital Trust II [Member]	Mar. 31, 2010 St. Joseph Capital Trust II [Member]	Mar. 31, 2005 St. Joseph Capital Trust II [Member]	Dec. 31, 2011 Integra Bank [Member]	Dec. 31, 2011 Subordinated Notes [Member]	Dec. 31, 2011 Subordinated Notes [Member] Monroe Bancorp [Member]
Debt Instrument [Line Items]
Weighted-average rates of Federal Home Loan Bank advances	3.30%	3.32%
Percentage of borrowings collateralized by investment securities and residential real estate loans	153.00%
Subordinated notes																		$ 13,000,000
Percentage, acquisition of subordinated notes																		10.00%
Portion of subordinated notes qualified as Tier 2 capital	13,000,000
Preferred securities						100,000,000		3,000,000		5,000,000		3,000,000			5,000,000
Liquidation amount of preferred securities, per share					$ 25
Cumulative annual distribution rate of preferred securities					8.00%									6.27%
Cumulative annual distribution rate of preferred securities per share					$ 2.00
Maturing date of preferred securities					Dec. 15, 2010								Mar. 17, 2035
Redemption of trust preferred securities				100,000,000
Additional base points over LIBOR, for three month securitites maturing on July 11, 2033	305
Additional base points over LIBOR, for three month securities maturing on March 17, 2035	175
Date of redemption					Dec. 15, 2010								Mar. 17, 2035
Expensed unamortized issuance costs	3,000,000
Fixed rate of interest of preferred securities							7.15%		6.52%
The reference rate of the variable interest rate for preferred securities	three-month LIBOR plus 160 basis points
Long-term capital lease obligation period, in years			25
Long-term capital lease obligation renewal period, in years			10
Maturity date					Apr. 15, 2032						Jul. 11, 2033					Jan. 01, 2012
Repayment of matured subordinate bank notes																	$ 150,000,000