Summary of Significant Accounting Policies - Schedule of Accumulated Other Comprehensive (Loss) Income (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other	$ 280	$ (882)	$ (714)
Total accumulated other comprehensive loss	(54,321)	(91,039)	(40,343)
Translation adjustment
Translation adjustment and foreign currency hedges, net of tax	(2,409)	68,393	104,781
Accumulated Other Comprehensive Income (Loss), Income Tax Benefit	2,064	0	0
Foreign currency hedges
Translation adjustment and foreign currency hedges, net of tax	(1,884)	(4,728)	(6,531)
Accumulated Other Comprehensive Income (Loss), Income Tax Benefit	1,380	3,099	4,317
Interest rate hedges
Interest rate hedges (net of tax of $352, $703 and $572, respectively	(960)	(1,466)	(1,516)
Accumulated Other Comprehensive Income (Loss), Income Tax Benefit	352	703	572
Pensions and other postretirement benefits
Pensions and other postretirement benefits (net of tax of $28,002, $91,397 and $82,380, respectively)	(52,027)	(152,475)	(137,701)
Accumulated Other Comprehensive Income (Loss), Income Tax Benefit	28,002	91,397	82,380
Available-for-sale Securities [Member]
Unrealized gain on securities, net (net of tax of $36, $0 and $0, respectively)	2,679	119	1,338
Accumulated Other Comprehensive Income (Loss), Income Tax Benefit	$ 36	$ 0	$ 0