Changes in Accumulated Other Comprehensive Income by Component (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Changes in Accumulated Other Comprehensive Income by Component [Roll Forward]
Accumulated other comprehensive income (loss)	$ 25,944	$ (66,752)
Other comprehensive income before reclassifications to consolidated statements of income	(133,386)	78,739
Amounts reclassified from accumulated other comprehensive (loss) income to the consolidated statements of income	7,989	13,957
Total other comprehensive (loss) income, net of tax	(125,397)	92,696	8,302
Accumulated other comprehensive income (loss)	(99,453)	25,944	(66,752)
Gains and Losses on Cash Flow Hedges
Changes in Accumulated Other Comprehensive Income by Component [Roll Forward]
Accumulated other comprehensive income (loss)	(519)	(432)
Other comprehensive income before reclassifications to consolidated statements of income	(1,074)	(48)
Amounts reclassified from accumulated other comprehensive (loss) income to the consolidated statements of income	861	(39)
Total other comprehensive (loss) income, net of tax	(213)	(87)
Accumulated other comprehensive income (loss)	(732)	(519)
Pension and Other Postretirement Benefit Items
Changes in Accumulated Other Comprehensive Income by Component [Roll Forward]
Accumulated other comprehensive income (loss)	(73,273)	(146,441)
Other comprehensive income before reclassifications to consolidated statements of income	(49,144)	63,315
Amounts reclassified from accumulated other comprehensive (loss) income to the consolidated statements of income	7,128	9,853
Total other comprehensive (loss) income, net of tax	(42,016)	73,168
Accumulated other comprehensive income (loss)	(115,289)	(73,273)
Foreign Currency Items
Changes in Accumulated Other Comprehensive Income by Component [Roll Forward]
Accumulated other comprehensive income (loss)	99,736	80,121
Other comprehensive income before reclassifications to consolidated statements of income	(83,168)	15,472
Amounts reclassified from accumulated other comprehensive (loss) income to the consolidated statements of income	0	4,143
Total other comprehensive (loss) income, net of tax	(83,168)	19,615
Accumulated other comprehensive income (loss)	$ 16,568	$ 99,736

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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