|
Available-for-sale Securities (Details 1) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2012
|
Dec. 31, 2011
|
|---|---|---|
| Classification of the available-for-sale securities | ||
| Available for sale securities total | $ 98,397 | $ 61,141 |
|
Cash and cash equivalents [Member]
|
||
| Classification of the available-for-sale securities | ||
| Available for sale securities total | 69,563 | 9,238 |
|
Marketable securities [Member]
|
||
| Classification of the available-for-sale securities | ||
| Available for sale securities total | 28,634 | 51,703 |
|
Restricted cash [Member]
|
||
| Classification of the available-for-sale securities | ||
| Available for sale securities total | $ 200 | $ 200 |