|
Fair Value Measurements (Details) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2012
|
Dec. 31, 2011
|
|---|---|---|
| Fair value measurements | ||
| Investments available for sale | $ 2,192 | $ 5,677 |
|
Municipal obligations
|
||
| Fair value measurements | ||
| Investments available for sale | 745 | 1,209 |
|
U.S. government security funds
|
||
| Fair value measurements | ||
| Investments available for sale | 986 | 983 |
|
Short-term deposits
|
||
| Fair value measurements | ||
| Investments available for sale | 3,104 | |
|
Equity securities
|
||
| Fair value measurements | ||
| Investments available for sale | 461 | 381 |
|
Recurring basis | Level 1 - Quoted Prices in Active Markets for Identical Assets
|
||
| Fair value measurements | ||
| Investment securities | 1,317 | 1,429 |
| Total assets measured at fair value on a recurring basis | 2,764 | 2,793 |
|
Recurring basis | Level 1 - Quoted Prices in Active Markets for Identical Assets | U.S. government security funds
|
||
| Fair value measurements | ||
| Investments available for sale | 986 | 983 |
|
Recurring basis | Level 1 - Quoted Prices in Active Markets for Identical Assets | Equity securities
|
||
| Fair value measurements | ||
| Investments available for sale | 461 | 381 |
|
Recurring basis | Level 2 - Significant Other Observable Inputs
|
||
| Fair value measurements | ||
| Total assets measured at fair value on a recurring basis | 745 | 4,313 |
|
Recurring basis | Level 2 - Significant Other Observable Inputs | Municipal obligations
|
||
| Fair value measurements | ||
| Investments available for sale | 745 | 1,209 |
|
Recurring basis | Level 2 - Significant Other Observable Inputs | Short-term deposits
|
||
| Fair value measurements | ||
| Investments available for sale | 3,104 | |
|
Recurring basis | Total
|
||
| Fair value measurements | ||
| Investment securities | 1,317 | 1,429 |
| Total assets measured at fair value on a recurring basis | 3,509 | 7,106 |
|
Recurring basis | Total | Municipal obligations
|
||
| Fair value measurements | ||
| Investments available for sale | 745 | 1,209 |
|
Recurring basis | Total | U.S. government security funds
|
||
| Fair value measurements | ||
| Investments available for sale | 986 | 983 |
|
Recurring basis | Total | Short-term deposits
|
||
| Fair value measurements | ||
| Investments available for sale | 3,104 | |
|
Recurring basis | Total | Equity securities
|
||
| Fair value measurements | ||
| Investments available for sale | $ 461 | $ 381 |