(5) Intangible Assets and Goodwill
Intangible assets at March 31, 2013 and 2012 consisted of:
| March 31, | ||||||||||||||||||||||||
| 2013 | 2012 | |||||||||||||||||||||||
| Gross Carrying Amount |
Accumulated Amortization |
Net Book Value |
Gross Carrying Amount |
Accumulated Amortization |
Net Book Value |
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Acquired technology |
$ | 680.0 | $ | (625.9 | ) | $ | 54.1 | $ | 658.3 | $ | (580.2 | ) | $ | 78.1 | ||||||||||
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Customer relationships |
442.4 | (308.1 | ) | 134.3 | 441.9 | (264.2 | ) | 177.7 | ||||||||||||||||
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Tradenames and trademarks |
46.4 | (45.0 | ) | 1.4 | 45.5 | (43.8 | ) | 1.7 | ||||||||||||||||
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Total intangible assets |
$ | 1,168.8 | $ | (979.0 | ) | $ | 189.8 | $ | 1,145.7 | $ | (888.2 | ) | $ | 257.5 | ||||||||||
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Amortization of acquired technology totaling $43.1 million, $55.6 million and $45.5 million was included in cost of license revenue in the consolidated statements of comprehensive income for fiscal 2013, 2012 and 2011, respectively. Amortization of other intangible assets is included in amortization of intangible assets in the consolidated statements of comprehensive income. The weighted average remaining life of acquired technology, customer relationships and trademarks and tradenames is approximately 3.3 years at March 31, 2013.
Future amortization expense associated with our intangible assets existing at March 31, 2013 is expected to be:
| Year Ending March 31, |
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| (In millions) | ||||
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2014 |
$ | 75.6 | ||
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2015 |
52.4 | |||
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2016 |
34.6 | |||
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2017 |
27.2 | |||
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2018 |
— | |||
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| $ | 189.8 | |||
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The following table summarizes goodwill activity and ending goodwill balances by operating segment:
| Enterprise Service Management - Solutions |
Mainframe Service Management |
Total | ||||||||||
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Balance at March 31, 2011 |
$ | 1,322.2 | $ | 84.8 | $ | 1,407.0 | ||||||
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Goodwill acquired/purchase accounting adjustments during the year |
281.6 | 16.3 | 297.9 | |||||||||
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Effect of foreign currency exchange rate changes |
(4.8 | ) | — | (4.8 | ) | |||||||
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Balance at March 31, 2012 |
1,599.0 | 101.1 | 1,700.1 | |||||||||
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Goodwill acquired/purchase accounting adjustments during the year |
3.2 | — | 3.2 | |||||||||
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Effect of foreign currency exchange rate changes |
2.6 | — | 2.6 | |||||||||
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Balance at March 31, 2013 |
$ | 1,604.8 | $ | 101.1 | $ | 1,705.9 | ||||||
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During the year ended March 31, 2013, we finalized our purchase price allocation for Numara, which resulted in adjustments to our initial estimates of the fair value of acquired assets and assumed liabilities, primarily related to deferred taxes. Our consolidated balance sheet at March 31, 2012 and the above table have been revised to reflect these adjustments as if they had been recorded on the date of acquisition.
No goodwill has been allocated to our ESM-Services segment.