Goodwill and Other Intangible Assets (Details Textual) (USD $)	12 Months Ended				12 Months Ended			12 Months Ended			12 Months Ended
	Dec. 31, 2010 First Bank Branches [Member]	Dec. 31, 2011 First Bank Branches [Member] Core Deposits [Member] Y	Feb. 19, 2010 First Bank Branches [Member] Core Deposits [Member]	Feb. 19, 2010 First Bank Branches [Member] Lease Agreements [Member]	Dec. 31, 2010 Midwest [Member]	Dec. 31, 2011 Midwest [Member] Core Deposits [Member] Y	May 14, 2010 Midwest [Member] Core Deposits [Member]	Dec. 31, 2011 Abl Loan Acquisition [Member]	Dec. 31, 2011 Abl Loan Acquisition [Member] Noncompete Agreements [Member] Y	Dec. 15, 2009 Abl Loan Acquisition [Member] Noncompete Agreements [Member]	Dec. 31, 2011 George Washington [Member] Core Deposits [Member] Y	Feb. 19, 2010 George Washington [Member] Core Deposits [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill, Acquired During Period	$ 48,347,000				$ 272,099,000			$ 400,000
Acquired Finite-lived Intangible Asset, Amount			$ 3,200,000	$ 600,000			$ 7,400,000			$ 100,000		$ 1,000,000
Finite-Lived Intangible Assets, Useful Life		10				10			4		10