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Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
Summary of other comprehensive income and tax impact |  |
Net unrealized gain on available-for-sale securities, net of income tax expense of $26 and $92, respectively | $ 41 | $ 139
Net unrealized gain (loss) on interest rate swaps, net of income tax expense (benefit) of $39 and ($25), respectively | 65 | (43)
Foreign currency translation | (14) | (16)
Total other comprehensive income | $ 92 | $ 80

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