Business Segment Information - Summary of Property, Plant and Equipment of Reporting Segments by Geographic Area (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Property plant and equipment net	$ 48,549	$ 54,372
U.S. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property plant and equipment net	37,029	39,287
Italy [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property plant and equipment net	6,865	8,150
U.K. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property plant and equipment net	1,368	1,871
Brazil [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property plant and equipment net	1,308	3,210
Others [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property plant and equipment net	$ 1,979	$ 1,854