Segment and Geographic Information - Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues from External Customers and Long-Lived Assets [Line Items]
Product revenue	$ 295,588	$ 297,310	$ 263,463
Service revenue	28,691	24,604	27,228
Long-lived assets	134,106	135,710	136,489
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Product revenue	87,877	87,166	74,105
Service revenue	13,248	10,796	12,493
Long-lived assets	120,596	121,174	122,760
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Product revenue	95,376	100,984	83,432
Service revenue	6,083	6,343	7,611
Long-lived assets	4,939	10,811	10,387
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Product revenue	38,151	45,295	55,269
Service revenue	5,043	4,147	3,986
Long-lived assets	2,229	2,773	2,457
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Product revenue	74,184	63,865	50,657
Service revenue	4,317	3,318	3,138
Long-lived assets	$ 6,342	$ 952	$ 885