| **Subsequent Events**            | 3 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
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| **Subsequent Events [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| Subsequent Events                | SUBSEQUENT EVENTSOn April 11, 2014, the Corporation entered into a line of credit agreement with U.S. Bank, N.A. with a maximum borrowing capacity of $20 million.  Interest is payable quarterly based on one-month LIBOR plus 2.00 percent.  The line of credit has a quarterly facility fee of 0.25 percent on the unused balance.  The maturity date for the line of credit is April 10, 2015.  The line of credit agreement contains certain customary representations and warranties and financial and negative covenants. |

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| - Definition
The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.
+ References
No definition available.
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