Fair Value Measurements (Details 2) (Significant Unobservable Inputs (Level 3) [Member], USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
POOLED TRUST PREFERRED SECURITIES [Member]
Investments in securities that are classified as level 3
Fair Value at September 30, 2012	3,052
POOLED TRUST PREFERRED SECURITIES [Member] | Discounted cash flow methodology [Member] | Minimum [Member]
Investments in securities that are classified as level 3
Cumulative Prepayment	0.00%
Cumulative Default	4.00%
Loss Given Default	85.00%
Cure Given Default	0.00%
POOLED TRUST PREFERRED SECURITIES [Member] | Discounted cash flow methodology [Member] | Maximum [Member]
Investments in securities that are classified as level 3
Cumulative Prepayment	100.00%
Cumulative Default	100.00%
Loss Given Default	100.00%
Cure Given Default	75.00%
POOLED TRUST PREFERRED SECURITIES [Member] | Discounted cash flow methodology [Member] | Weighted Average [Member]
Investments in securities that are classified as level 3
Cumulative Prepayment	4.30%
Cumulative Default	20.00%
Loss Given Default	94.90%
Cure Given Default	31.90%
PRIVATIVE MORTGAGE-BACKED SECURITIES [Member]
Investments in securities that are classified as level 3
Fair Value at September 30, 2012	4,112
PRIVATIVE MORTGAGE-BACKED SECURITIES [Member] | Multi-dimensional spread tables [Member] | Minimum [Member]
Investments in securities that are classified as level 3
Cumulative Prepayment	10.30%
Constant Default Rate	0.80%
Loss Severity	25.00%
PRIVATIVE MORTGAGE-BACKED SECURITIES [Member] | Multi-dimensional spread tables [Member] | Maximum [Member]
Investments in securities that are classified as level 3
Cumulative Prepayment	14.50%
Constant Default Rate	20.50%
Loss Severity	62.50%
PRIVATIVE MORTGAGE-BACKED SECURITIES [Member] | Multi-dimensional spread tables [Member] | Weighted Average [Member]
Investments in securities that are classified as level 3
Cumulative Prepayment	13.90%
Constant Default Rate	3.60%
Loss Severity	38.90%
IMPAIRED LOANS [Member]
Investments in securities that are classified as level 3
Fair Value at September 30, 2012	7,450	[1]
OTHER REAL ESTATE OWNED [Member]
Investments in securities that are classified as level 3
Fair Value at September 30, 2012	8,751	[1]

[1] Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various Level 3 inputs which are not identifiable. Appraisals may be adjusted by management for qualitative factors such as economic factors and estimated liquidation expenses. The range of these possible adjustments may vary.