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Property and Equipment | 12 Months Ended
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Dec. 31, 2013
Property, Plant and Equipment [Abstract] |
Property and Equipment |
| Property and Equipment
The major classes of property and equipment are as follows:
| Estimated Useful Lives |  | December 31,
|  | 2013 |  | 2012
Land(a) | — |  | $ | 1,305,942 |  |  | $ | 1,119,592 |
Buildings | 40 years |  | 70,497 |  |  | 56,883 |
Towers and small cells | 1-20 years |  | 11,717,453 |  |  | 9,589,282 |
Information technology assets and other | 2-7 years |  | 185,699 |  |  | 160,670 |
Construction in process | — |  | 401,042 |  |  | 240,287 |
Total gross property and equipment |  |  | 13,680,633 |  |  | 11,166,714 |
Less: accumulated depreciation |  |  | (4,732,956 | ) |  | (4,249,183 | )
Total property and equipment, net |  |  | $ | 8,947,677 |  |  | $ | 6,917,531 |
(a) | Includes land owned in fee and perpetual easements.
Depreciation expense for the years ended December 31, 2013, 2012 and 2011 was $562.1 million, $438.9 million and $387.8 million, respectively. Capital leases and associated leasehold improvements related to gross property and equipment and accumulated depreciation was $4.5 billion and $590.5 million, respectively, as of December 31, 2013. See note 1 and 2.

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2921-110230 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13-14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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