Certain Balance Sheet Components Certain Balance Sheet Components (Tables)

9 Months Ended

Sep. 30, 2012

Balance Sheet Related Disclosures [Abstract]

Accounts Receivable, Net [Table Text Block]

Accounts receivable, net	September 30, 2012		December 31, 2011
	(in thousands)
Trade receivables (net of allowance of $5,355 and $6,049)	$	307,062	$	328,845
Unbilled receivables	56,049		42,796
Total accounts receivable, net	$	363,111	$	371,641

Summary of Allowance for Doubtful Accounts [Table Text Block]

Allowance for doubtful account activity	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
	(in thousands)
Beginning balance	$	5,381		$	8,980		$	6,049		$	9,045
Provision (release) of doubtful accounts, net	(124		)	175			(414		)	128
Accounts written-off	(53		)	(1,127		)	(314		)	(1,680		)
Effects of change in exchange rates	151			(576		)	34			(41		)
Ending balance	$	5,355		$	7,452		$	5,355		$	7,452

Inventories [Table Text Block]

Inventories	September 30, 2012		December 31, 2011
	(in thousands)
Materials	$	104,404	$	112,470
Work in process	14,720		16,306
Finished goods	82,651		67,061
Total inventories	$	201,775	$	195,837

Property, Plant, and Equipment, Net [Table Text Block]

Property, plant, and equipment, net	September 30, 2012			December 31, 2011
	(in thousands)
Machinery and equipment	$	278,615		$	269,611
Computers and purchased software	82,760			74,885
Buildings, furniture, and improvements	143,486			140,064
Land	27,460			26,126
Construction in progress, including purchased equipment	23,391			20,687
Total cost	555,712			531,373
Accumulated depreciation	(304,009		)	(268,703		)
Property, plant, and equipment, net	$	251,703		$	262,670

Depreciation Expense [Table Text Block]

Depreciation expense	Three Months Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
	(in thousands)
Depreciation expense	$	15,656	$	16,607	$	45,989	$	49,112