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Accumulated Other Comprehensive Income (Details 1) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
Summary of reclassifications out of accumulated other comprehensive income |  |
Gains and losses on cash flow hedges, Income tax provision | $ (19) | $ 161
Net of tax | 51 | (411)
Total reclassifications, net of tax | 3,878 | 2,606
Costs of products sold [Member] |  |
Summary of reclassifications out of accumulated other comprehensive income |  |
Gains (losses) on cash flow hedges, costs of products sold | 70 | (572)
Pension Plan Items [Member] |  |
Summary of reclassifications out of accumulated other comprehensive income |  |
Subtotal | 6,063 | 4,936
Income tax provision | (2,284) | (1,885)
Net of tax | 3,779 | 3,051
Pension Plan Items [Member] | Costs of products sold [Member] |  |
Summary of reclassifications out of accumulated other comprehensive income |  |
Amortization of deferred benefit, Prior service costs | 613 | 506
Amortization of deferred benefit, Actuarial losses | 4,114 | 3,490
Pension Plan Items [Member] | Selling, general and administrative expenses [Member] |  |
Summary of reclassifications out of accumulated other comprehensive income |  |
Amortization of deferred benefit, Prior service costs | 161 | 107
Amortization of deferred benefit, Actuarial losses | 1,175 | 833
Other Plan Items [Member] |  |
Summary of reclassifications out of accumulated other comprehensive income |  |
Subtotal | 77 | (55)
Income tax provision | (29) | 21
Net of tax | 48 | (34)
Other Plan Items [Member] | Costs of products sold [Member] |  |
Summary of reclassifications out of accumulated other comprehensive income |  |
Amortization of deferred benefit, Prior service costs | (100) | (190)
Amortization of deferred benefit, Actuarial losses | 155 | 138
Other Plan Items [Member] | Selling, general and administrative expenses [Member] |  |
Summary of reclassifications out of accumulated other comprehensive income |  |
Amortization of deferred benefit, Prior service costs | (25) | (44)
Amortization of deferred benefit, Actuarial losses | $ 47 | $ 41

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