Certain Balance Sheet Components Certain Balance Sheet Components (Tables)

12 Months Ended

Dec. 31, 2013

Balance Sheet Related Disclosures [Abstract]

Accounts Receivable, Net [Table Text Block]

Accounts receivable, net	December 31, 2013		December 31, 2012
	(in thousands)
Trade receivables (net of allowance of $8,368and $7,372)	$	328,240	$	329,352
Unbilled receivables	28,469		45,974
Total accounts receivable, net	$	356,709	$	375,326

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

Allowance for doubtful account activity	Year Ended December 31,
	2013			2012
	(in thousands)
Beginning balance	$	7,372		$	6,049
Provision of doubtful accounts, net	1,740			1,851
Accounts written-off	(636		)	(595		)
Effects of change in exchange rates	(108		)	67
Ending balance	$	8,368		$	7,372

Inventories [Table Text Block]

Inventories	December 31, 2013		December 31, 2012
	(in thousands)
Materials	$	102,596	$	92,038
Work in process	13,770		12,568
Finished goods	61,101		66,113
Total inventories	$	177,467	$	170,719

Property, Plant, and Equipment [Table Text Block]

Property, plant, and equipment, net	December 31, 2013			December 31, 2012
	(in thousands)
Machinery and equipment	$	309,525		$	287,791
Computers and software	99,654			84,980
Buildings, furniture, and improvements	145,926			146,191
Land	24,005			25,318
Construction in progress, including purchased equipment	14,257			26,097
Total cost	593,367			570,377
Accumulated depreciation	(346,547		)	(315,165		)
Property, plant, and equipment, net	$	246,820		$	255,212

Depreciation Expense [Table Text Block]

Depreciation expense	Year Ended December 31,
	2013		2012		2011
	(in thousands)
Depreciation expense	$	56,826	$	61,661	$	66,072