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Summary of Significant Accounting Policies (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2011
years
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Dec. 31, 2010
|
Dec. 31, 2009
|
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| Increase (decrease) in restricted cash for operating activities | $ 17.9 | $ 18.9 | $ 3.6 |
| Increase (decrease) in restricted cash for investing activities | 15.4 | 0 | 0 |
| Allowance for deferred site rental receivables | $ 0 | $ 5.1 | |
| Useful life of site rental contracts and customer relationships (years) | 20 | ||
| Revenue recognition, non-cancelable lease term, minimum (years) | 5 | ||
| Revenue recognition, non-cancelable lease term, maximum (years) | 15 | ||
| Portion of company site rental costs that are ground lease expenses | 0.667 | ||
| Ground lease agreement initial term | 5 years | ||
| Percentage of tax position that is likely of being realized upon ultimate settlement | 50.00% | ||
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Maximum [Member]
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| Original Maturities of Highly Liquid Investments | 3 months | ||
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Wireless Infrastructure [Member]
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| Property, plant and equipment estimated useful life, maximum (years) | 20 | ||
| X | ||||||||||
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- Definition
An allowance for uncollectible amount to offset the deferred site rental receivable that arises from site rental revenue recognized in excess of amount currently due under lease agreement. No definition available.
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| X | ||||||||||
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- Definition
This disclosure represents the initial term of the Company’s ground lease agreements No definition available.
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| X | ||||||||||
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- Definition
The net cash inflow or outflow for the increase (decrease) associated with funds that are not available for withdrawal or use and are associated with underlying transactions that are classified as investing activities. No definition available.
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| X | ||||||||||
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- Definition
This disclosure represents the original maturities of the Company's cash equivalents on the balance sheet No definition available.
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| X | ||||||||||
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- Definition
The threshold percentage of an uncertain tax position at which the Company will recognize a tax position. No definition available.
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| X | ||||||||||
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- Definition
Portion of Company site rental costs That are related to ground lease expenses No definition available.
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| X | ||||||||||
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- Definition
Revenue Recognition Non Cancelable Lease Term, Range (Maximum) No definition available.
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| X | ||||||||||
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- Definition
Revenue Recognition Non-cancelable Lease Term, Range (Minimum) No definition available.
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| X | ||||||||||
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- Definition
The useful life of all finite-lived intangible assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The net cash inflow or outflow for the increase (decrease) associated with funds that are not available for withdrawal or use (such as funds held in escrow) and are associated with underlying transactions that are classified as operating activities. This may include cash restricted for regulatory purposes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The maximum useful life of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. No definition available.
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