Disclosures About Fair Value of Financial Instruments (Detail Textuals) (Fair Value Measurements Using Significant Unobservable Inputs (Level 3), Fair Value, Measurements, Recurring, Trust Preferred Securities Subject to Mandatory Redemption)	12 Months Ended
	Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loss, given default	100.00%
Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Default probability	0.21%
Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Default probability	1.73%