Employee Benefits - Pension and Other Defined Contribution Retirement Plan Expenses (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost for benefits earned	$ 885,000	$ 881,000	$ 1,769,000	$ 1,762,000
Interest cost on projected benefit obligation	6,232,000	5,741,000	12,463,000	11,482,000
Expected return on plan assets	(6,913,000)	(6,557,000)	(13,826,000)	(13,114,000)
Net amortization and deferrals	4,255,000	5,869,000	8,509,000	11,738,000
Net periodic benefit cost	4,459,000	5,934,000	8,915,000	11,868,000
Defined contribution and other retirement plans	1,791,000	2,076,000	3,902,000	3,946,000
Total expense	6,250,000	8,010,000	12,817,000	15,814,000
Non-U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost for benefits earned	4,002,000	4,027,000	7,950,000	8,170,000
Interest cost on projected benefit obligation	8,541,000	7,612,000	16,952,000	15,486,000
Expected return on plan assets	(12,675,000)	(11,695,000)	(25,155,000)	(23,794,000)
Net amortization and deferrals	3,000,000	2,284,000	5,954,000	4,652,000
Loss due to settlements and special terminations	0	35,000	0	75,000
Net periodic benefit cost	2,868,000	2,263,000	5,701,000	4,589,000
Defined contribution and other retirement plans	1,444,000	987,000	2,622,000	2,278,000
Total expense	4,312,000	3,250,000	8,323,000	6,867,000
Maximum [Member] | Non-U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to the plan			$ 21,000,000