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Fair Value Measurements (Details) (USD $)
In Thousands, unless otherwise specified
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Jun. 30, 2012
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Dec. 31, 2011
|
| Hierarchy of inputs used to derive fair value of Company's assets |
|
|
| Investment securities, at fair value |
$ 7,931 |
$ 4,642 |
| Trading securities, at fair value |
7,322 |
4,032 |
| Available-for-sale securities, at fair value |
609 |
610 |
|
Equity securities [Member]
|
|
|
| Hierarchy of inputs used to derive fair value of Company's assets |
|
|
| Trading securities, at fair value |
5,744 |
2,656 |
|
Short -term securities [Member]
|
|
|
| Hierarchy of inputs used to derive fair value of Company's assets |
|
|
| Trading securities, at fair value |
800 |
636 |
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Managed mutual funds [Member]
|
|
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| Hierarchy of inputs used to derive fair value of Company's assets |
|
|
| Trading securities, at fair value |
778 |
740 |
|
US Treasury Note (0.375%, 9/30/2012) [Member]
|
|
|
| Hierarchy of inputs used to derive fair value of Company's assets |
|
|
| Available-for-sale securities, at fair value |
506 |
506 |
|
US Treasury Note (1.75%, 1/31/2014) [Member]
|
|
|
| Hierarchy of inputs used to derive fair value of Company's assets |
|
|
| Available-for-sale securities, at fair value |
103 |
104 |
|
Level 1 [Member]
|
|
|
| Hierarchy of inputs used to derive fair value of Company's assets |
|
|
| Investment securities, at fair value |
5,821 |
4,032 |
|
Level 1 [Member] | Equity securities [Member]
|
|
|
| Hierarchy of inputs used to derive fair value of Company's assets |
|
|
| Trading securities, at fair value |
4,243 |
2,656 |
|
Level 1 [Member] | Short -term securities [Member]
|
|
|
| Hierarchy of inputs used to derive fair value of Company's assets |
|
|
| Trading securities, at fair value |
800 |
636 |
|
Level 1 [Member] | Managed mutual funds [Member]
|
|
|
| Hierarchy of inputs used to derive fair value of Company's assets |
|
|
| Trading securities, at fair value |
778 |
740 |
|
Level 1 [Member] | US Treasury Note (0.375%, 9/30/2012) [Member]
|
|
|
| Hierarchy of inputs used to derive fair value of Company's assets |
|
|
| Available-for-sale securities, at fair value |
|
|
|
Level 1 [Member] | US Treasury Note (1.75%, 1/31/2014) [Member]
|
|
|
| Hierarchy of inputs used to derive fair value of Company's assets |
|
|
| Available-for-sale securities, at fair value |
|
|
|
Level 2 [Member]
|
|
|
| Hierarchy of inputs used to derive fair value of Company's assets |
|
|
| Investment securities, at fair value |
2,110 |
610 |
|
Level 2 [Member] | Equity securities [Member]
|
|
|
| Hierarchy of inputs used to derive fair value of Company's assets |
|
|
| Trading securities, at fair value |
1,501 |
|
|
Level 2 [Member] | Short -term securities [Member]
|
|
|
| Hierarchy of inputs used to derive fair value of Company's assets |
|
|
| Trading securities, at fair value |
|
|
|
Level 2 [Member] | Managed mutual funds [Member]
|
|
|
| Hierarchy of inputs used to derive fair value of Company's assets |
|
|
| Trading securities, at fair value |
|
|
|
Level 2 [Member] | US Treasury Note (0.375%, 9/30/2012) [Member]
|
|
|
| Hierarchy of inputs used to derive fair value of Company's assets |
|
|
| Available-for-sale securities, at fair value |
506 |
506 |
|
Level 2 [Member] | US Treasury Note (1.75%, 1/31/2014) [Member]
|
|
|
| Hierarchy of inputs used to derive fair value of Company's assets |
|
|
| Available-for-sale securities, at fair value |
103 |
104 |
|
Level 3 [Member]
|
|
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| Hierarchy of inputs used to derive fair value of Company's assets |
|
|
| Investment securities, at fair value |
|
|
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Level 3 [Member] | Equity securities [Member]
|
|
|
| Hierarchy of inputs used to derive fair value of Company's assets |
|
|
| Trading securities, at fair value |
|
|
|
Level 3 [Member] | Short -term securities [Member]
|
|
|
| Hierarchy of inputs used to derive fair value of Company's assets |
|
|
| Trading securities, at fair value |
|
|
|
Level 3 [Member] | Managed mutual funds [Member]
|
|
|
| Hierarchy of inputs used to derive fair value of Company's assets |
|
|
| Trading securities, at fair value |
|
|
|
Level 3 [Member] | US Treasury Note (0.375%, 9/30/2012) [Member]
|
|
|
| Hierarchy of inputs used to derive fair value of Company's assets |
|
|
| Available-for-sale securities, at fair value |
|
|
|
Level 3 [Member] | US Treasury Note (1.75%, 1/31/2014) [Member]
|
|
|
| Hierarchy of inputs used to derive fair value of Company's assets |
|
|
| Available-for-sale securities, at fair value |
|
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