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Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Net income | $ 164,947 | $ 217,049 | $ 369,873
Other comprehensive (loss) income, net of tax: |  |  |
Foreign currency translation reclassification adjustment included in net income |  |  | 2,266
Unrealized (losses) gains on marketable securities: |  |  |
Unrealized (losses) gains on marketable securities arising during period, net of tax of $216, $370, $1,247 | (1,097) | 2,009 | 1,409
Less: Reclassification adjustment for gains included in net income, net of tax of $(257), $(201), $(581) | (447) | (702) | (1,412)
Total unrealized gain (loss) on marketable securities | (1,544) | 1,307 | (3)
Defined benefit pension and post-retirement plans: |  |  |
Amortization of prior service (benefit) cost included in net periodic pension and post-retirement expense/income, net of tax $(159), $(134), $9 | (276) | (233) | 14
Other comprehensive (loss) income | (1,820) | 1,074 | 2,277
Comprehensive income | $ 163,127 | $ 218,123 | $ 372,150

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