Certain Balance Sheet Components Certain Balance Sheet Components (Tables)

6 Months Ended

Jun. 30, 2011

Balance Sheet Related Disclosures [Abstract]

Accounts Receivable, Net [Table Text Block]

Accounts receivable, net	June 30, 2011		December 31, 2010
	(in thousands)
Trade receivables (net of allowance of $8,980 and $9,045)	$	348,736	$	328,811
Unbilled receivables	29,099		42,851
Total accounts receivable, net	$	377,835	$	371,662

Summary of Allowance for Doubtful Accounts [Table Text Block]

Allowance for doubtful account activity	Three Months Ended June 30,						Six Months Ended June 30,
	2011			2010			2011			2010
	(in thousands)
Beginning balance	$	9,030		$	5,870		$	9,045		$	6,339
Provision (release) of doubtful accounts, net	298			742			(48		)	662
Accounts written-off	(505		)	(43		)	(552		)	(173		)
Effects of change in exchange rates	157			(271		)	535			(530		)
Ending balance	$	8,980		$	6,298		$	8,980		$	6,298

Inventories [Table Text Block]

Inventories	June 30, 2011		December 31, 2010
	(in thousands)
Materials	$	132,303	$	106,021
Work in process	26,058		18,389
Finished goods	94,718		83,747
Total inventories	$	253,079	$	208,157

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

Depreciation Expense [Table Text Block]

Depreciation expense	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
	(in thousands)
Depreciation expense	$	16,571	$	14,994	$	32,505	$	30,494