|
Long-term Debt (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended |
|---|---|
|
Dec. 31, 2014
|
|
| Long-term debt | |
| Long-term debt | $ 50,000 |
| Notes payable, Federal Home Loan Bank of Chicago | |
| Long-term debt | |
| Long-term debt | $ 50,000 |
| Interest rate, minimum (as a percent) | 0.07% |
| Interest rate, maximum (as a percent) | 0.13% |
| Weighted average rate (as a percent) | 0.09% |
| Notes payable, Federal Home Loan Bank of Chicago | Maximum | |
| Long-term debt | |
| Notes payable maturity date | 10 years |