Benefit Plans Benefit Plans (Detail 1) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation, Beginning	$ 1,031,760	$ 957,642
Defined Benefit Plans, Service Cost and Other	32,351	29,642
Defined Benefit Plan, Interest Cost	20,641	28,081	$ 25,726
Defined Benefit Plan, Actuarial Gain (Loss)	(14,991)	144,227
Defined Benefit Plan, Plan Amendments	(12,228)	(2,404)
Defined Benefit Plan, Benefits Paid	(56,982)	(42,673)
Foreign Currency Exchange Rate Changes, Benefit Obligation	(24,595)	(82,755)
Benefit Obligation, Ending	975,956	1,031,760	957,642
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets, Beginning	883,223	904,435
Defined Benefit Plan, Actual Return on Plan Assets	(8,832)	43,867
Defined Benefit Plan, Contributions by Employer	23,616	43,861
Defined Benefit Plan, Contributions by Plan Participants	13,013	13,543
Defined Benefits Plan, Benefits Paid and Other Charges	56,982	42,673
Foreign Currency Exchange Rate Changes, Plan Assets	(9,323)	(79,810)
Fair Value of Plan Assets, Ending	844,715	883,223	904,435
Defined Benefit Plan, Funded Status of Plan	(131,241)	(148,537)
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation, Beginning	164,367	138,147
Defined Benefit Plans, Service Cost and Other	837	893
Defined Benefit Plan, Interest Cost	6,431	6,396	5,755
Defined Benefit Plan, Actuarial Gain (Loss)	(10,145)	25,848
Defined Benefit Plan, Plan Amendments	0	0
Defined Benefit Plan, Benefits Paid	(7,075)	(6,917)
Foreign Currency Exchange Rate Changes, Benefit Obligation	0	0
Benefit Obligation, Ending	154,415	164,367	138,147
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets, Beginning	132,030	117,903
Defined Benefit Plan, Actual Return on Plan Assets	(5,907)	2,974
Defined Benefit Plan, Contributions by Employer	70	18,070
Defined Benefit Plan, Contributions by Plan Participants	0	0
Defined Benefits Plan, Benefits Paid and Other Charges	7,075	6,917
Foreign Currency Exchange Rate Changes, Plan Assets	0	0
Fair Value of Plan Assets, Ending	119,118	132,030	117,903
Defined Benefit Plan, Funded Status of Plan	(35,297)	(32,337)
Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation, Beginning	863,639	814,200
Defined Benefit Plans, Service Cost and Other	31,514	28,579
Defined Benefit Plan, Interest Cost	14,071	21,445	19,566
Defined Benefit Plan, Actuarial Gain (Loss)	(4,959)	117,902
Defined Benefit Plan, Plan Amendments	(12,391)	(453)
Defined Benefit Plan, Benefits Paid	(49,010)	(35,279)
Foreign Currency Exchange Rate Changes, Benefit Obligation	(24,595)	(82,755)
Benefit Obligation, Ending	818,269	863,639	814,200
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets, Beginning	751,193	786,532
Defined Benefit Plan, Actual Return on Plan Assets	(2,925)	40,893
Defined Benefit Plan, Contributions by Employer	22,812	25,448
Defined Benefit Plan, Contributions by Plan Participants	12,850	13,409
Defined Benefits Plan, Benefits Paid and Other Charges	49,010	35,279
Foreign Currency Exchange Rate Changes, Plan Assets	(9,323)	(79,810)
Fair Value of Plan Assets, Ending	725,597	751,193	786,532
Defined Benefit Plan, Funded Status of Plan	(92,672)	(112,446)
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation, Beginning	3,754	5,295
Defined Benefit Plans, Service Cost and Other	0	170
Defined Benefit Plan, Interest Cost	139	240	405
Defined Benefit Plan, Actuarial Gain (Loss)	113	477
Defined Benefit Plan, Plan Amendments	163	(1,951)
Defined Benefit Plan, Benefits Paid	(897)	(477)
Foreign Currency Exchange Rate Changes, Benefit Obligation	0	0
Benefit Obligation, Ending	3,272	3,754	5,295
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	734	343
Defined Benefit Plan, Contributions by Plan Participants	163	134
Defined Benefits Plan, Benefits Paid and Other Charges	897	477
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	$ (3,272)	$ (3,754)

The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period and other deminimus expenses. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

No definition available.