Certain Balance Sheet Components Certain Balance Sheet Components (Tables)

12 Months Ended

Dec. 31, 2014

Balance Sheet Related Disclosures [Abstract]

Accounts Receivable, Net [Table Text Block]

Accounts receivable, net	December 31, 2014		December 31, 2013
	(in thousands)
Trade receivables (net of allowance of $6,195and $8,368)	$	312,302	$	328,240
Unbilled receivables	36,087		28,469
Total accounts receivable, net	$	348,389	$	356,709

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

Allowance for doubtful account activity	Year Ended December 31,
	2014			2013
	(in thousands)
Beginning balance	$	8,368		$	7,372
Provision for doubtful accounts, net	308			1,740
Accounts written-off	(1,955		)	(636		)
Effects of change in exchange rates	(526		)	(108		)
Ending balance	$	6,195		$	8,368

Inventories [Table Text Block]

Inventories	December 31, 2014		December 31, 2013
	(in thousands)
Materials	$	90,557	$	102,596
Work in process	8,991		13,770
Finished goods	54,956		61,101
Total inventories	$	154,504	$	177,467

Property, Plant, and Equipment [Table Text Block]

Property, plant, and equipment, net	December 31, 2014			December 31, 2013
	(in thousands)
Machinery and equipment	$	287,448		$	309,525
Computers and software	100,212			99,654
Buildings, furniture, and improvements	134,461			145,926
Land	21,186			24,005
Construction in progress, including purchased equipment	21,007			14,257
Total cost	564,314			593,367
Accumulated depreciation	(356,525		)	(346,547		)
Property, plant, and equipment, net	$	207,789		$	246,820

Depreciation Expense [Table Text Block]

Depreciation expense	Year Ended December 31,
	2014		2013		2012
	(in thousands)
Depreciation expense	$	54,759	$	56,826	$	61,661