Subsequent Event (Details) (USD $)	0 Months Ended
	Feb. 08, 2012	Jan. 30, 2012	Dec. 31, 2011 Parent Company [Member]	Dec. 31, 2010 Parent Company [Member]
Subordinated fixed-rate notes percentage		5.875%
Maturity date		2013
Principal amount of the notes outstanding		$ 177,500,000	$ 213,146,000	$ 235,790,000	[1]
Consideration payable	74,900,000
Consideration paid for each principal amount	$ 77,800,000

[1] Certain previously reported information has been corrected to reflect the deferment of certain commercial loan fees.