Details of Selected Balance Sheet Accounts (Tables)

3 Months Ended

Mar. 31, 2014

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of Inventories

A summary of inventories is as follows (in thousands):	March 31, 2014			December 31, 2013
Raw materials and subassemblies	$	56,252		$	54,168
Work-in-process	2,428			2,297
Finished goods	27,285			33,263
Reserve for excess and obsolete inventories	(31,256		)	(32,555		)
Total	$	54,709		$	57,173

Summary of Other Long-term Liabilities

A summary of other long-term liabilities is as follows (in thousands):	March 31, 2014		December 31, 2013
Accrual for loss contingency related to legal proceedings (Note 8)	$	123,770	$	193,327
Facility restructuring accrual	4,818		4,837
Other long-term liabilities	14,399		12,438
Total	$	142,987	$	210,602