Benefit Plans Benefit Plans (Detail 1) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation, Beginning	$ 957,642	$ 966,728
Defined Benefit Plans, Service Cost and Other	29,642	31,025
Defined Benefit Plan, Interest Cost	28,081	25,726
Defined Benefit Plan, Actuarial Gain (Loss)	144,227	(31,691)
Defined Benefit Plan, Plan Amendments	(2,404)	(3,440)
Defined Benefit Plan, Benefits Paid	(42,673)	(50,823)
Foreign Currency Exchange Rate Changes, Benefit Obligation	(82,755)	20,117
Benefit Obligation, Ending	1,031,760	957,642
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets, Beginning	904,435	825,774
Defined Benefit Plan, Actual Return on Plan Assets	43,867	54,553
Defined Benefit Plan, Contributions by Employer	43,861	43,646
Defined Benefit Plan, Contributions by Plan Participants	13,543	13,404
Defined Benefits Plan, Benefits Paid and Other Charges	(42,673)	(50,823)
Foreign Currency Exchange Rate Changes, Plan Assets	(79,810)	17,881
Fair Value of Plan Assets, Ending	883,223	904,435
Defined Benefit Plan, Funded Status of Plan	(148,537)	(53,207)
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation, Beginning	138,147	156,804
Defined Benefit Plans, Service Cost and Other	893	494
Defined Benefit Plan, Interest Cost	6,396	5,755	6,093
Defined Benefit Plan, Actuarial Gain (Loss)	25,848	(18,226)
Defined Benefit Plan, Plan Amendments	0	0
Defined Benefit Plan, Benefits Paid	(6,917)	(6,680)
Foreign Currency Exchange Rate Changes, Benefit Obligation	0	0
Benefit Obligation, Ending	164,367	138,147	156,804
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets, Beginning	117,903	94,734
Defined Benefit Plan, Actual Return on Plan Assets	2,974	12,073
Defined Benefit Plan, Contributions by Employer	18,070	17,776
Defined Benefit Plan, Contributions by Plan Participants	0	0
Defined Benefits Plan, Benefits Paid and Other Charges	(6,917)	(6,680)
Foreign Currency Exchange Rate Changes, Plan Assets	0	0
Fair Value of Plan Assets, Ending	132,030	117,903	94,734
Defined Benefit Plan, Funded Status of Plan	(32,337)	(20,244)
Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation, Beginning	814,200	798,657
Defined Benefit Plans, Service Cost and Other	28,579	30,315
Defined Benefit Plan, Interest Cost	21,445	19,566	22,104
Defined Benefit Plan, Actuarial Gain (Loss)	117,902	(11,477)
Defined Benefit Plan, Plan Amendments	(453)	293
Defined Benefit Plan, Benefits Paid	(35,279)	(43,271)
Foreign Currency Exchange Rate Changes, Benefit Obligation	(82,755)	20,117
Benefit Obligation, Ending	863,639	814,200	798,657
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets, Beginning	786,532	731,040
Defined Benefit Plan, Actual Return on Plan Assets	40,893	42,480
Defined Benefit Plan, Contributions by Employer	25,448	25,147
Defined Benefit Plan, Contributions by Plan Participants	13,409	13,255
Defined Benefits Plan, Benefits Paid and Other Charges	(35,279)	(43,271)
Foreign Currency Exchange Rate Changes, Plan Assets	(79,810)	17,881
Fair Value of Plan Assets, Ending	751,193	786,532	731,040
Defined Benefit Plan, Funded Status of Plan	(112,446)	(27,668)
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation, Beginning	5,295	11,267
Defined Benefit Plans, Service Cost and Other	170	216
Defined Benefit Plan, Interest Cost	240	405	539
Defined Benefit Plan, Actuarial Gain (Loss)	477	(1,988)
Defined Benefit Plan, Plan Amendments	(1,951)	(3,733)
Defined Benefit Plan, Benefits Paid	(477)	(872)
Foreign Currency Exchange Rate Changes, Benefit Obligation	0	0
Benefit Obligation, Ending	3,754	5,295	11,267
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets, Beginning	0	0
Defined Benefit Plan, Actual Return on Plan Assets	0	0
Defined Benefit Plan, Contributions by Employer	343	723
Defined Benefit Plan, Contributions by Plan Participants	134	149
Defined Benefits Plan, Benefits Paid and Other Charges	(477)	(872)
Foreign Currency Exchange Rate Changes, Plan Assets	0	0
Fair Value of Plan Assets, Ending	0	0	0
Defined Benefit Plan, Funded Status of Plan	$ (3,754)	$ (5,295)