Federal Funds Purchased and Securities Sold under Agreements to Repurchase and Wholesale Borrowings (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011
Wholesale Borrowings, Due One Year or Less	$ 50,057
Wholesale Borrowings, Due One to Three Years	39,647
Wholesale Borrowings, Due Three to Five Years	78,158
Wholesale Borrowings, Due Over Five Years	35,600
Wholesale Borrowings, Maturities Summary	203,462
Federal Home Loan Bank Advances [Member]
Wholesale Borrowings, Due One Year or Less	50,000
Wholesale Borrowings, Due One to Three Years	39,524
Wholesale Borrowings, Due Three to Five Years	78,019
Wholesale Borrowings, Due Over Five Years	35,525
Wholesale Borrowings, Maturities Summary	203,068
Wholesale Borrowings [Member]
Wholesale Borrowings, Due One Year or Less	57
Wholesale Borrowings, Due One to Three Years	123
Wholesale Borrowings, Due Three to Five Years	139
Wholesale Borrowings, Due Over Five Years	75
Wholesale Borrowings, Maturities Summary	$ 394