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Certain Balance Sheet Components (Text Block) | 3 Months Ended
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Mar. 31, 2017
Balance Sheet Related Disclosures [Abstract] |
Certain Balance Sheet Components [Text Block] | Certain Balance Sheet Components
Accounts receivable, net | March 31, 2017 |  | December 31, 2016
| (in thousands)
Trade receivables (net of allowance of $3,424 and $3,320) | $ | 307,065 |  |  | $ | 299,870 |
Unbilled receivables | 37,346 |  |  | 51,636 |
Total accounts receivable, net | $ | 344,411 |  |  | $ | 351,506 |
Allowance for doubtful accounts activity | Three Months Ended March 31,
| 2017 |  | 2016
| (in thousands)
Beginning balance | $ | 3,320 |  |  | $ | 5,949 |
Provision (release) for doubtful accounts, net | 303 |  |  | (8 | )
Accounts written-off | (330 | ) |  | (1,478 | )
Effect of change in exchange rates | 131 |  |  | 78 |
Ending balance | $ | 3,424 |  |  | $ | 4,541 |
Inventories | March 31, 2017 |  | December 31, 2016
| (in thousands)
Materials | $ | 111,832 |  |  | $ | 103,274 |
Work in process | 10,573 |  |  | 7,925 |
Finished goods | 55,655 |  |  | 51,850 |
Total inventories | $ | 178,060 |  |  | $ | 163,049 |
Property, plant, and equipment, net | March 31, 2017 |  | December 31, 2016
| (in thousands)
Machinery and equipment | $ | 287,378 |  |  | $ | 279,746 |
Computers and software | 101,648 |  |  | 98,125 |
Buildings, furniture, and improvements | 125,383 |  |  | 122,680 |
Land | 17,604 |  |  | 17,179 |
Construction in progress, including purchased equipment | 29,612 |  |  | 29,358 |
Total cost | 561,625 |  |  | 547,088 |
Accumulated depreciation | (382,978 | ) |  | (370,630 | )
Property, plant, and equipment, net | $ | 178,647 |  |  | $ | 176,458 |
Depreciation expense | Three Months Ended March 31,
| 2017 |  | 2016
| (in thousands)
Depreciation expense | $ | 9,829 |  |  | $ | 10,464 |

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- Definition The entire disclosure for supplemental balance sheet disclosures, including descriptions and amounts for assets, liabilities, and equity. + References No definition available. + Details
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