Concentrations of Credit Risk

9 Months Ended

Sep. 30, 2013

Concentrations of Credit Risk [Abstract]

Concentration Risk Disclosure [Text Block]

Concentration of Credit Risk

The Company derives the largest portion of its revenues from customers in the wireless communications industry. The Company also has a concentration in its volume of business with Sprint, AT&T, Verizon Wireless and T-Mobile or their agents that accounts for a significant portion of the Company's revenues, receivables and deferred site rental receivables. The Company mitigates its concentrations of credit risk with respect to trade receivables by actively monitoring the creditworthiness of its customers, utilizing customer leases with contractually determinable payment terms and proactively managing past due balances.

Major Customers

The following table summarizes the percentage of the consolidated revenues for those customers accounting for more than 10% of the consolidated revenues (all of such customer revenues relate to our CCUSA segment). The following table is after giving effect to T-Mobile's acquisition of MetroPCS (completed in April 2013), Sprint's acquisition of Clearwire (completed in July 2013) and AT&T's pending acquisition of Leap Wireless.

	Nine Months Ended September 30,
	2013		2012
Sprint(a)	28	%	26	%
T-Mobile(b)	23	%	14	%
AT&T(c)	22	%	23	%
Verizon Wireless	16	%	18	%
Total	89	%	81	%

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(a) For the nine months ended September 30, 2013, Sprint and Clearwire accounted for 25% and 3%, respectively, of consolidated net revenues. As of September 30, 2013, Sprint and Clearwire are co-residents on approximately 2,700 towers. The weighted-average remaining term on these tower tenant contracts with Sprint and Clearwire is approximately seven years and three years, respectively. Revenue from Clearwire on these 2,700 towers represented approximately 2% of consolidated site rental revenues for the nine months ended September 30, 2013.

(b) For the nine months ended September 30, 2013, T-Mobile and MetroPCS accounted for 17% and 6%, respectively, of consolidated net revenues. As of September 30, 2013, T-Mobile and MetroPCS are co-residents on approximately 1,400 towers. The weighted-average remaining term on these tower tenant contracts with T-Mobile and MetroPCS is approximately nine years and five years, respectively. Revenue from MetroPCS on these 1,400 towers represented approximately 2% of consolidated site rental revenues for the nine months ended September 30, 2013.

(c) For the nine months ended September 30, 2013, AT&T and Leap Wireless accounted for 19% and 3%, respectively, of consolidated net revenues. As of September 30, 2013, AT&T and Leap Wireless are co-residents on approximately 1,300 towers. The weighted-average remaining term on these tower tenant contracts with AT&T and Leap Wireless is approximately 10 years and four years, respectively. Revenue from Leap Wireless on these 1,300 towers represented approximately 1% of consolidated site rental revenues for the nine months ended September 30, 2013.

See also note 13 for a description of the Proposed AT&T Transaction.