Certain Balance Sheet Components Certain Balance Sheet Components (Tables)

6 Months Ended

Jun. 30, 2013

Balance Sheet Related Disclosures [Abstract]

Accounts Receivable, Net [Table Text Block]

Accounts receivable, net	June 30, 2013		December 31, 2012
	(in thousands)
Trade receivables (net of allowance of $6,948 and $7,372)	$	330,956	$	329,352
Unbilled receivables	41,284		45,974
Total accounts receivable, net	$	372,240	$	375,326

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

Allowance for doubtful account activity	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
	(in thousands)
Beginning balance	$	6,144		$	5,983		$	7,372		$	6,049
Provision (release) of doubtful accounts, net	1,075			(230		)	171			(290		)
Accounts written-off	(198		)	(22		)	(303		)	(261		)
Effects of change in exchange rates	(73		)	(350		)	(292		)	(117		)
Ending balance	$	6,948		$	5,381		$	6,948		$	5,381

Inventories [Table Text Block]

Inventories	June 30, 2013		December 31, 2012
	(in thousands)
Materials	$	104,283	$	92,038
Work in process	13,879		12,568
Finished goods	72,252		66,113
Total inventories	$	190,414	$	170,719

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

Property, plant, and equipment, net	June 30, 2013			December 31, 2012
	(in thousands)
Machinery and equipment	$	290,500		$	287,791
Computers and software	88,186			84,980
Buildings, furniture, and improvements	143,420			146,191
Land	24,663			25,318
Construction in progress, including purchased equipment	33,529			26,097
Total cost	580,298			570,377
Accumulated depreciation	(330,926		)	(315,165		)
Property, plant, and equipment, net	$	249,372		$	255,212

Depreciation Expense and Capitalized interest [Table Text Block]

Depreciation expense and capitalized interest	Three Months Ended June 30,				Six Months Ended June 30,
	2013		2012		2013		2012
	(in thousands)
Depreciation expense	$	14,027	$	15,019	$	28,040	$	30,333
Capitalized interest	21		—		64		—