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Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013
Statement Of Income And Comprehensive Income [Abstract] |  |
Net income | $ 14,648 | $ 15,629
Foreign currency translation adjustments | 728 | (11,957)
Net change in: |  |
Deferred gains (losses) on cash flow hedges, net of taxes of $27 and $(170), respectively | (79) | 441
Unrecognized retirement obligations, net of taxes of $(1,415) and $(2,313), respectively | 2,316 | 3,827
Other comprehensive income (loss) | 2,965 | (7,689)
Comprehensive income | $ 17,613 | $ 7,940

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