Employee Benefit Plans - Plans in which PBO Exceeded Fair Value (Detail) (Projected benefit obligation [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 3,157	$ 6,740
Fair value of plan assets	592	5,820
U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	238,072	200,472
Fair value of plan assets	$ 172,119	$ 171,413