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Stockholders' Equity (Details 1) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
Changes in accumulated other comprehensive income |  |
Unrealized Gains on Investments, Beginning Balance | $ 275 |
Cumulative Foreign Currency Translation Adjustments, Beginning Balance | 42,158 |
Unrecognized Net Actuarial loss and Prior Service Credit, Beginning Balance | (14,968) |
Accumulated Other Comprehensive Income, Beginning Balance | 27,465 |
Other comprehensive income before reclassification, Unrealized gains on investments | 79 |
Other comprehensive income before reclassification, Cumulative Foreign Currency Translation Adjustments | (6,128) | 4,386
Other Comprehensive Income before reclassification, Accumulated Other Comprehensive Income | (6,049) |
Amounts reclassified from AOCI, net of tax, Unrealized Gains on Investments | (18) | (30)
Amounts reclassified from AOCI, net of tax, Unrecognized Net Actuarial loss and Prior Service Credit | 41 | 3
Accumulated Other Comprehensive Income | 23 |
Net other comprehensive income (loss), Unrealized gains on investments | 61 |
Net other comprehensive income (loss), Cumulative Foreign Currency Translation Adjustments | (6,128) |
Net other comprehensive income (loss), Unrecognized Net Actuarial loss and Prior Service Credit | 41 |
Net other comprehensive income (loss), Accumulated Other Comprehensive Income | (6,026) | 4,482
Unrealized Gains on Investments, Ending Balance | 336 |
Cumulative Foreign Currency Translation Adjustments, Ending Balance | 36,030 |
Unrecognized Net Actuarial Loss and Prior Service Credit, Ending Balance | (14,927) |
Accumulated Other Comprehensive Income, Ending Balance | $ 21,439 |

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