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New Accounting Pronouncements (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Other comprehensive (loss) income: |  |  |
Balance at the beginning of the period | $ 3,022 | $ 2,318 |
Foreign currency translation adjustment | (1,245) | 425 | (287)
Unrealized holding gains (losses) on corporate debt securities | (98) | 279 | 1,116
Realized gain on redemption of corporate debt securities | (1,296) |  |
Balance at the end of the period | 383 | 3,022 | 2,318
Foreign Currency |  |  |
Other comprehensive (loss) income: |  |  |
Balance at the beginning of the period | 1,628 | 1,203 |
Foreign currency translation adjustment | (1,245) | 425 |
Balance at the end of the period | 383 | 1,628 |
Available for sale securities |  |  |
Other comprehensive (loss) income: |  |  |
Balance at the beginning of the period | 1,394 | 1,115 |
Unrealized holding gains (losses) on corporate debt securities | (98) | 279 |
Realized gain on redemption of corporate debt securities | (1,296) |  |
Balance at the end of the period |  | $ 1,394 |

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