Accumulated Other Comprehensive Loss (Details) (USD $) In Thousands, unless otherwise specified			9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Currency Translation Adjustments and Other [Member]	Sep. 30, 2013 Currency Translation Adjustments and Other [Member]	Sep. 30, 2014 Net Actuarial Loss [Member]		Sep. 30, 2013 Net Actuarial Loss [Member]		Sep. 30, 2014 Prior Service Credit [Member]		Sep. 30, 2013 Prior Service Credit [Member]		Sep. 30, 2014 Accumulated Other Comprehensive Loss [Member]	Sep. 30, 2013 Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive (Loss) [Roll Forward]
Accumulated other comprehensive loss, beginning of period	$ (466,423)	$ (438,248)	$ 35,875	$ 57,860	$ (477,883)	[1]	$ (648,113)	[1]	$ 3,760	[1]	$ 2,634	[1]	$ (438,248)	$ (587,619)
Amortization					11,183	[1]	17,176	[1]	(2,008)	[1]	(1,020)	[1]	9,175	16,156
Other current period change			(35,198)	(18,379)	(2,043)	[1]	(3,714)	[1]	(109)	[1]	0	[1]	(37,350)	(22,093)
Accumulated other comprehensive loss, end of period	$ (466,423)	$ (438,248)	$ 677	$ 39,481	$ (468,743)	[1]	$ (634,651)	[1]	$ 1,643	[1]	$ 1,614	[1]	$ (466,423)	$ (593,556)

[1] These amounts are included in the computation of net periodic benefit cost. See Note (N), "Employee Benefit Plans," for further information.