Goodwill and Other Intangible Assets |
4. GOODWILL AND OTHER INTANGIBLE ASSETS The changes in the carrying value of goodwill for the years ended December 31, 2011 and 2010 are as follows (in thousands): | | | | | | | | | | | | | | 2011 | | 2010 (1) | | | | | | | | | | | | Balance as of January 1, as revised for purchase accounting measurement period adjustments | | $ | 2,511,907 | | $ | 2,250,538 | | Additions | | | 356,247 | | | 251,781 | | Effect of foreign currency translation | | | (62,887) | | | 9,588 | | Balance as of December 31, | | $ | 2,805,267 | | $ | 2,511,907 | | | | | | | | | | | | | | | | | | | | | | (1) | Balances have been revised to reflect purchase accounting measurement period adjustments. | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | The Company's other intangible assets subject to amortization consist of the following: | | | | | | | | | | | | | | | | | | | | As of December 31, 2011 | | As of December 31, 2010 (3) | | | Estimated Useful Lives | | Gross Carrying Value | | Accumulated Amortization | | Net Book Value | | Gross Carrying Value | | Accumulated Amortization | | Net Book Value | | | | | | | | | | | | | | | | | | (years) | | (in thousands) | | | | | | | | | | | | | | | | Acquired network location (1) | Up to 20 | $ | 1,496,440 | $ | (654,137) | $ | 842,303 | $ | 1,263,636 | $ | (603,578) | $ | 660,058 | Acquired customer-related intangibles | 15-20 | | 2,286,399 | | (843,432) | | 1,442,967 | | 1,897,482 | | (736,851) | | 1,160,631 | Acquired licenses and other intangibles | 3-15 | | 24,939 | | (20,045) | | 4,894 | | 21,601 | | (19,984) | | 1,617 | Economic Rights, TV Azteca | 70 | | 26,902 | | (12,643) | | 14,259 | | 30,292 | | (13,646) | | 16,646 | | | | | | | | | | | | | | | | Total | | | 3,834,680 | | (1,530,257) | | 2,304,423 | | 3,213,011 | | (1,374,059) | | 1,838,952 | Deferred financing costs, net (2) | N/A | | | | | | 47,532 | | | | | | 46,914 | Other intangible assets, net | | | | | | $ | 2,351,955 | | | | | $ | 1,885,866 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | (1) | Acquired network location intangibles are amortized over the shorter of the term of the corresponding ground lease or up to 20 years, as the Company considers these intangibles to be directly related to the tower assets. | (2) | Deferred financing costs are amortized over the term of the respective debt instruments to which they relate. This amortization is included in interest expense, rather than in amortization expense. | (3) | December 31, 2010 balances have been revised to reflect purchase accounting measurement period adjustments. | | | | | | | | | | | | | | | |
The acquired network location intangible represents the value to the Company of the incremental revenue growth which could potentially be obtained from leasing the excess capacity on acquired communications sites. The acquired customer-related intangibles typically represent the value to the Company of customer contracts and relationships in place at the time of an acquisition, including assumptions regarding estimated renewals. The acquired licenses and other intangibles consist primarily of non-competition agreements acquired from SpectraSite, Inc., and in other tower acquisitions. The Company amortizes these intangibles on a straight-line basis. As of December 31, 2011, the weighted average amortization period of the Company's intangible assets, excluding the TV Azteca Economic Rights, is approximately 13 years. Amortization of intangible assets for the years ended December 31, 2011, 2010 and 2009 aggregated approximately $176.4 million, $156.1 million and $140.2 million, respectively (excluding amortization of deferred financing costs, which is included in interest expense). Based on the current estimated useful lives, the Company expects to record amortization expense (excluding amortization of deferred financing costs) as follows over the next five years (in thousands): | | | Year Ending December 31, | | | 2012 | $ | 188,100 | 2013 | | 179,896 | 2014 | | 171,638 | 2015 | | 158,047 | 2016 | | 150,634 | | | |
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