Property and Equipment - Components of Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Gross Property and Equipment	$ 295,668	$ 268,065
Less accumulated depreciation and amortization	(186,080)	(166,716)
Net property and equipment	109,588	101,349
Buildings [Member]
Property, Plant and Equipment [Line Items]
Gross Property and Equipment	4,613	2,134
Land [Member]
Property, Plant and Equipment [Line Items]
Gross Property and Equipment	504	504
Machinery, Equipment and Tooling [Member]
Property, Plant and Equipment [Line Items]
Gross Property and Equipment	110,728	88,222
Furniture and Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Gross Property and Equipment	13,448	12,672
Computers and Software [Member]
Property, Plant and Equipment [Line Items]
Gross Property and Equipment	139,723	130,357
Automobiles [Member]
Property, Plant and Equipment [Line Items]
Gross Property and Equipment	18	18
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Gross Property and Equipment	17,880	16,380
Projects In Progress - Computers and Software [Member]
Property, Plant and Equipment [Line Items]
Gross Property and Equipment	2,079	2,217
Projects in Progress - Other [Member]
Property, Plant and Equipment [Line Items]
Gross Property and Equipment	$ 6,675	$ 15,561