Stock-Based Compensation (Details) (USD $)	6 Months Ended			6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	May 31, 2008	Jun. 30, 2011 Restricted Stock Awards [Member]	Jun. 30, 2010 Restricted Stock Awards [Member]	Jun. 30, 2011 Restricted Stock Units [Member]	Jun. 30, 2010 Restricted Stock Units [Member]	Jun. 30, 2011 Stock Options [Member]	Jun. 30, 2010 Stock Options [Member]	Jan. 31, 2011 Old National Bancorp [Member]	Jan. 31, 2011 Monroe Bancorp [Member]
Shares authorized under incentive compensation plan			1,000,000
Shares available for issuance	2,500,000
Stock based compensation expense	$ (1,539,000)	$ (1,285,000)						$ 41,000	$ 86,000
Options for shares converted on acquisition											300,000
Options for shares received on acquisition										300,000
Restricted stock awards granted				119,000
Unrecognized compensation expense				2,200,000
Restricted stock expense	1,471,000	1,142,000		400,000	400,000	400,000	300,000
Reversal of expense related to performance based restricted stock grants					$ 100,000	$ 13,000
Restricted stock units granted						156,000