Segments and Geographical Information - Long-Lived Assets by Geographic Area (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Segment Reporting Information [Line Items]
Long-lived assets	$ 90,125	[1]	$ 75,743	[1]
United States
Segment Reporting Information [Line Items]
Long-lived assets	76,511	[1]	61,439	[1]
Mexico
Segment Reporting Information [Line Items]
Long-lived assets	6,229	[1]	6,291	[1]
the Netherlands
Segment Reporting Information [Line Items]
Long-lived assets	874	[1]	1,630	[1]
Other international
Segment Reporting Information [Line Items]
Long-lived assets	$ 6,511	[1]	$ 6,383	[1]

[1] Long-lived assets are attributed to countries based on entity that owns the assets.