Benefit Plans Benefit Plans (Detail 2) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Other Non-current Assets for Plan Benefits	$ 38,922	$ 105,132
Pension and Other Postretirement Defined Benefit Plans, Liabilities	(187,459)	(158,339)
Accumulated Other Comprehensive Income (Loss), before Tax	284,035	154,068
Net amount recognized	135,498	100,861
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Other Non-current Assets for Plan Benefits	0	0
Pension and Other Postretirement Defined Benefit Plans, Liabilities	(32,337)	(20,244)
Accumulated Other Comprehensive Income (Loss), before Tax	85,636	59,013
Net amount recognized	53,299	38,769
Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Other Non-current Assets for Plan Benefits	38,922	105,132
Pension and Other Postretirement Defined Benefit Plans, Liabilities	(151,368)	(132,800)
Accumulated Other Comprehensive Income (Loss), before Tax	213,702	110,965
Net amount recognized	101,256	83,297
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Other Non-current Assets for Plan Benefits	0	0
Pension and Other Postretirement Defined Benefit Plans, Liabilities	(3,754)	(5,295)
Accumulated Other Comprehensive Income (Loss), before Tax	(15,303)	(15,910)
Net amount recognized	$ (19,057)	$ (21,205)