Pension and Other Post-Retirement Benefit Plans (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
U.S. Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 84	$ 108	$ 112
Interest cost	1,887	1,704	1,802
Expected return on plan assets	(2,514)	(2,202)	(1,955)
Recognized actuarial loss (gain)	159	421	371
Net periodic benefit cost	(384)	31	330
Net benefit cost	(384)	31	330
Non-U.S. Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Interest cost	1,758	1,761	1,863
Expected return on plan assets	(1,891)	(1,878)	(1,697)
Recognized actuarial loss (gain)	249	302	260
Net periodic benefit cost	116	185	426
Net benefit cost	116	185	426
Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Interest cost	28	29	48
Amortization of prior service cost	6	(122)	(128)
Recognized actuarial loss (gain)	(158)	(157)	(89)
Net periodic benefit cost	(124)	(250)	(169)
Net benefit cost	$ (124)	$ (250)	$ (169)