Certain Balance Sheet Components Certain Balance Sheet Components (Tables)

3 Months Ended

Mar. 31, 2012

Balance Sheet Related Disclosures [Abstract]

Accounts Receivable, Net [Table Text Block]

Accounts receivable, net	March 31, 2012		December 31, 2011
	(in thousands)
Trade receivables (net of allowance of $5,983 and $6,049)	$	335,633	$	328,845
Unbilled receivables	53,545		42,796
Total accounts receivable, net	$	389,178	$	371,641

Summary of Allowance for Doubtful Accounts [Table Text Block]

Allowance for doubtful account activity	Three Months Ended March 31,
	2012			2011
	(in thousands)
Beginning balance	$	6,049		$	9,045
Provision (release) of doubtful accounts, net	(60		)	(346		)
Accounts written-off	(239		)	(47		)
Effects of change in exchange rates	233			379
Ending balance	$	5,983		$	9,031

Inventories [Table Text Block]

Inventories	March 31, 2012		December 31, 2011
	(in thousands)
Materials	$	115,069	$	112,470
Work in process	14,573		16,306
Finished goods	81,016		67,061
Total inventories	$	210,658	$	195,837

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

Property, plant, and equipment, net	March 31, 2012			December 31, 2011
	(in thousands)
Machinery and equipment	$	276,719		$	269,611
Computers and purchased software	77,857			74,885
Buildings, furniture, and improvements	147,177			140,064
Land	28,632			26,126
Construction in progress, including purchased equipment	19,936			20,687
Total cost	550,321			531,373
Accumulated depreciation	(286,518		)	(268,703		)
Property, plant, and equipment, net	$	263,803		$	262,670

Depreciation Expense [Table Text Block]

Depreciation expense	Three Months Ended March 31,
	2012		2011
	(in thousands)
Depreciation expense	$	15,314	$	15,934