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Marketable Securities (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2012
Marketable Securities [Abstract] |
Held-To-Maturity Securities |
|  |  |  |  | Gross |  |  | Gross |  |  |  |
|  |  |  |  | unrealized |  |  | unrealized |  |  |  |
|  | Aggregate |  |  | holding |  |  | holding |  |  | Aggregate |
|  | cost basis** |  |  | gains |  |  | (losses) |  |  | fair value* |
|  | US$ thousands |
At December 31, 2011 |  |  |  |  |  |  |  |  |  |  |  |
Held to maturity: |  |  |  |  |  |  |  |  |  |  |  |
Corporate debt securities and |  |  |  |  |  |  |  |  |  |  |  |
government debt securities |  |  |  |  |  |  |  |  |  |  |  |
Current |  |  | 9,108 |  |  |  | 5 |  |  |  | (100 | ) |  |  | 9,013 |
Non-Current |  |  | 23,911 |  |  |  | - |  |  |  | (452 | ) |  |  | 23,459 |
|  |  | 33,019 |  |  |  | 5 |  |  |  | (552 | ) |  |  | 32,472 |
At December 31, 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Held to maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate debt securities and |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
government debt securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current |  |  | 12,702 |  |  |  | 23 |  |  |  | (56 | ) |  |  | 12,669 |
Non-Current |  |  | 28,775 |  |  |  | 193 |  |  |  | (126 | ) |  |  | 28,842 |
|  |  | 41,477 |  |  |  | 216 |  |  |  | (182 | ) |  |  | 41,511 |
* Fair value is being determined using quoted market prices in active markets (Level 1).
| ** | Including accrued interest in the amount of $325K and $425K as of December 31, 2011 and 2012 respectively.
Schedule Of Debt Securities By Major Interest Type |
|  | December 31, 2011 |
|  |  |  |  | Net unrealized |  |  |  |
|  | Amortized cost |  |  | holding gains/(losses) |  |  | Fair value |
|  | US$ thousands |
Up to 2% |  |  | 25,225 |  |  |  | (415 | ) |  |  | 24,810 |
2.038% - 2.874% |  |  | 7,794 |  |  |  | (132 | ) |  |  | 7,662 |
|  |  | 33,019 |  |  |  | (547 | ) |  |  | 32,472 |
|  | December 31, 2012 |
|  |  |  |  | Net unrealized |  |  |  |
|  | Amortized cost |  |  | holding gains/(losses) |  |  | Fair value |
|  | US$ thousands |
Up to 2% |  |  | 33,145 |  |  |  | (84 | ) |  |  | 33,061 |
2.038% - 2.951% |  |  | 8,332 |  |  |  | 118 |  |  |  | 8,450 |
|  |  | 41,477 |  |  |  | 34 |  |  |  | 41,511 |
Schedule Of Reconciliation Of Marketable Securities [Table Text Block] |
|  | US$ thousands |
Balance at January 1, 2012 |  |  | 33,019 |
Purchases of marketable securities |  |  | 17,992 |
Discount of marketable securities |  |  | (579 | )
Proceeds from maturity of marketable securities |  |  | (8,955 | )
Balance at December 31, 2012 |  |  | 41,477 |
Summary Of Investment Securities In An Unrealized Loss Position |
|  | Less than 12 months |  |  | 12 months or more |  |  | Total |
Held to maturity |  | Unrealized Losses |  |  | Fair value |  |  | Unrealized Losses |  |  | Fair value |  |  | Unrealized Losses |  |  | Fair value |
Corporate debt securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
and government debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
securities |  |  | (106 | ) |  |  | 6,803 |  |  |  | (76 | ) |  |  | 10,701 |  |  |  | (182 | ) |  |  | 17,504 |

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