|
Investment in Securities (Details Textual) (USD $)
|
9 Months Ended | ||
|---|---|---|---|
|
Sep. 30, 2011
|
Sep. 30, 2012
Security
|
Dec. 31, 2011
Security
|
|
| Investment in Securities (Textual) [Abstract] | |||
| Proceeds from sales of available-for-sale securities | $ 15,650,000 | ||
| Gross realized gains | 2,800,000 | ||
| Gross realized losses | 56,000 | ||
| Income tax expense (benefit) related to gross gains | 1,100,000 | ||
| Income tax expense (benefit) related to gross losses | (23,000) | ||
| Security sales | 22,765,000 | ||
| Number of corporate debt securities | 9 | ||
| Number of debt securities at unrealized losses | 0 | ||
| Percentage of aggregate depreciation related to nine debt securities | 0.80% | ||
| Available-for-sale securities | $ 22,765,000 | $ 0 |