Post Retirement Benefit Plans (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
U.S. Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 54	$ 111	$ 250	$ 323
Interest cost	488	490	1,552	1,472
Expected return on plan assets	(617)	(752)	(1,857)	(2,232)
Net amortization/deferrals	355	753	1,665	2,431
Net periodic benefit cost	280	602	1,610	1,994
International Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	659	505	1,511	1,524
Interest cost	2,271	1,651	5,936	4,984
Expected return on plan assets	(2,655)	(2,087)	(7,116)	(6,304)
Net amortization/deferrals	766	849	2,292	2,570
Settlement loss recognized		166		166
Net periodic benefit cost	1,041	1,084	2,623	2,940
U.S. Post Retirement
Defined Benefit Plan Disclosure [Line Items]
Service cost	7	22	27	36
Interest cost	289	192	881	834
Net amortization/deferrals	(350)	(367)	(1,003)	(791)
Net periodic benefit cost	(54)	(153)	(95)	79
International Post Retirement
Defined Benefit Plan Disclosure [Line Items]
Service cost	10	12	28	36
Interest cost	42	42	126	129
Net amortization/deferrals	(16)	(75)	(46)	(228)
Net periodic benefit cost	$ 36	$ (21)	$ 108	$ (63)