Below is a summary of the major intangible assets and weighted average amortization periods for each identifiable intangible asset, in thousands:
| As of December 31, 2013 | Weighted Average Amortization Period (Years) |
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Intangible assets |
Acquired Cost |
Accumulated Amortization |
Net Intangible Assets |
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Client Relationships |
$ | 547,860 | $ | (422,367 | ) | $ | 125,493 | 9.5 | ||||||||
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Technology & Patents |
122,099 | (72,549 | ) | 49,550 | 8.7 | |||||||||||
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Trade names (indefinite-lived) |
47,110 | — | 47,110 | Not applicable | ||||||||||||
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Trade names (finite-lived) |
27,414 | (20,389 | ) | 7,025 | 4.3 | |||||||||||
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Other intangible assets |
15,894 | (13,631 | ) | 2,263 | 4.3 | |||||||||||
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Total |
$ | 760,377 | $ | (528,936 | ) | $ | 231,441 | 8.4 | ||||||||
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| As of December 31, 2012 | Weighted Average Amortization Period (Years) |
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Intangible assets |
Acquired Cost |
Accumulated Amortization |
Net Intangible Assets |
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Client Relationships |
$ | 544,273 | $ | (382,359 | ) | $ | 161,914 | 9.5 | ||||||||
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Technology & Patents |
120,606 | (57,768 | ) | 62,838 | 8.7 | |||||||||||
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Trade names (indefinite-lived) |
47,110 | — | 47,110 | Not applicable | ||||||||||||
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Trade names (finite-lived) |
27,319 | (16,760 | ) | 10,559 | 4.3 | |||||||||||
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Other intangible assets |
15,898 | (12,647 | ) | 3,251 | 4.3 | |||||||||||
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Total |
$ | 755,206 | $ | (469,534 | ) | $ | 285,672 | 8.4 | ||||||||
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