Subsequent Events	3 Months Ended
Mar. 31, 2012
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events NextG Networks Acquisition In December 2011, the Company entered into a definitive agreement to acquire NextG for approximately $1.0 billion in cash, subject to certain adjustments. On April 10, 2012 the Company closed the acquisition (“NextG acquisition”), pursuant to which a wholly owned indirect subsidiary of the Company merged with and into NextG, with NextG continuing as the surviving company following the merger and as a wholly owned indirect subsidiary of the Company. NextG has over 7,000 DAS nodes on-air and approximately 1,500 nodes under construction in the U.S. In addition, NextG has rights to over 4,600 miles of fiber. NextG is the largest provider of outdoor DAS, a network of antennas for the benefit of wireless carriers which is connected by fiber to a communications hub designed to facilitate wireless communications. Approximately 80% of NextG's nodes are located in the 10 largest basic trading areas in the U.S. The Company utilized borrowings under the 2012 Term Loans to fund the cash consideration of $1.0 billion. The preliminary purchase price allocation for the NextG acquisition is based upon a preliminary valuation and the Company's estimates and assumptions, which are subject to change as the Company obtains additional information within the measurement period. The preliminary allocation of the total purchase price for the NextG acquisition was primarily allocated to goodwill, other intangible assets, property and equipment, deferred tax liabilities and other liabilities. The purchase price allocation is expected to result in a substantial amount of goodwill, which may exceed 50% of the purchase price. In connection with the purchase accounting related to the NextG acquisition, the Company recorded a U.S. federal deferred tax liability. The Company expects to reverse up to $100 million of its federal valuation allowance as an income tax benefit in the second quarter of 2012 as a result of the net U.S. federal deferred tax liability recorded in connection with the NextG acquisition.

Subsequent Events

NextG Networks Acquisition

In December 2011, the Company entered into a definitive agreement to acquire NextG for approximately $1.0 billion in cash, subject to certain adjustments. On April 10, 2012 the Company closed the acquisition (“NextG acquisition”), pursuant to which a wholly owned indirect subsidiary of the Company merged with and into NextG, with NextG continuing as the surviving company following the merger and as a wholly owned indirect subsidiary of the Company. NextG has over 7,000 DAS nodes on-air and approximately 1,500 nodes under construction in the U.S. In addition, NextG has rights to over 4,600 miles of fiber. NextG is the largest provider of outdoor DAS, a network of antennas for the benefit of wireless carriers which is connected by fiber to a communications hub designed to facilitate wireless communications. Approximately 80% of NextG's nodes are located in the 10 largest basic trading areas in the U.S.

The Company utilized borrowings under the 2012 Term Loans to fund the cash consideration of $1.0 billion.

The preliminary purchase price allocation for the NextG acquisition is based upon a preliminary valuation and the Company's estimates and assumptions, which are subject to change as the Company obtains additional information within the measurement period. The preliminary allocation of the total purchase price for the NextG acquisition was primarily allocated to goodwill, other intangible assets, property and equipment, deferred tax liabilities and other liabilities. The purchase price allocation is expected to result in a substantial amount of goodwill, which may exceed 50% of the purchase price.

In connection with the purchase accounting related to the NextG acquisition, the Company recorded a U.S. federal deferred tax liability. The Company expects to reverse up to $100 million of its federal valuation allowance as an income tax benefit in the second quarter of 2012 as a result of the net U.S. federal deferred tax liability recorded in connection with the NextG acquisition.