Certain Balance Sheet Components Certain Balance Sheet Components (Tables)

9 Months Ended

Sep. 30, 2014

Balance Sheet Related Disclosures [Abstract]

Accounts Receivable, Net [Table Text Block]

Accounts receivable, net	September 30, 2014		December 31, 2013
	(in thousands)
Trade receivables (net of allowance of $6,524 and $8,368)	$	310,261	$	328,240
Unbilled receivables	32,219		28,469
Total accounts receivable, net	$	342,480	$	356,709

Allowance for Credit Losses on Financing Receivables [Table Text Block]

Allowance for doubtful accounts activity	Three Months Ended September 30,						Nine Months Ended September 30,
	2014			2013			2014			2013
	(in thousands)
Beginning balance	$	7,355		$	6,948		$	8,368		$	7,372
Provision (release) of doubtful accounts, net	(356		)	1,290			(545		)	1,461
Accounts written-off	(233		)	(164		)	(1,023		)	(467		)
Effect of change in exchange rates	(242		)	153			(276		)	(139		)
Ending balance	$	6,524		$	8,227		$	6,524		$	8,227

Inventories [Table Text Block]

Inventories	September 30, 2014		December 31, 2013
	(in thousands)
Materials	$	101,607	$	102,596
Work in process	11,694		13,770
Finished goods	77,388		61,101
Total inventories	$	190,689	$	177,467

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

Property, plant, and equipment, net	September 30, 2014			December 31, 2013
	(in thousands)
Machinery and equipment	$	307,098		$	309,525
Computers and software	101,861			99,654
Buildings, furniture, and improvements	139,681			145,926
Land	22,764			24,005
Construction in progress, including purchased equipment	16,730			14,257
Total cost	588,134			593,367
Accumulated depreciation	(365,780		)	(346,547		)
Property, plant, and equipment, net	$	222,354		$	246,820

Depreciation Expense [Table Text Block]

Depreciation expense	Three Months Ended September 30,				Nine Months Ended September 30,
	2014		2013		2014		2013
	(in thousands)
Depreciation expense	$	13,691	$	14,330	$	42,118	$	42,370