Debt (Tables)

9 Months Ended

Sep. 30, 2013

Carrying Values of Debt

The carrying and principal values of debt consist of the following (in thousands):

		As of September 30, 2013					As of December 31, 2012
	Maturity Date	Principal Balance		Carrying Value			Principal Balance		Carrying Value
		(in thousands)
1.875% Convertible Senior Notes	May 1, 2013	$	—	$	—		$	468,836	$	457,351
4.000% Convertible Senior Notes	Oct. 1, 2014		499,947		458,535			499,987		430,751
8.250% Senior Notes	Aug. 15, 2019		243,750		242,340			243,750		242,205
5.625% Senior Notes	Oct. 1, 2019		500,000		500,000			500,000		500,000
5.750% Senior Notes	July 15, 2020		800,000		800,000			800,000		800,000
4.254% Secured Tower Revenue Securities Series 2010-1	April 15, 2015		680,000		680,000			680,000		680,000
5.101% Secured Tower Revenue Securities Series 2010-2	April 17, 2017		550,000		550,000			550,000		550,000
2.933% Secured Tower Revenue Securities Series 2012-1	Dec. 15, 2017		610,000		610,000			610,000		610,000
2.240% Secured Tower Revenue Securities Series 2013-1C	April 17, 2018		425,000		425,000			—		—
3.722% Secured Tower Revenue Securities Series 2013-2C	April 17, 2023		575,000		575,000			—		—
3.598% Secured Tower Revenue Securities Series 2013-1D	April 17, 2018		330,000		330,000			—		—
Revolving Credit Facility	May 9, 2017		—		—			100,000		100,000
2011 Term Loan B	June 30, 2018		180,529		180,218			492,500		491,518
2012-1 Term Loan A	May 9, 2017		187,500		187,500			195,000		195,000
2012-2 Term Loan B	Sept. 28, 2019		109,971		109,735			300,000		299,278
Total debt			5,691,697		5,648,328			5,440,073		5,356,103
Less: current maturities of long-term debt					(11,250	)				(475,351	)
Total long-term debt, net of current maturities				$	5,637,078				$	4,880,752

Schedule of Cash and Non-Cash Interest Expense

The table below reflects cash and non-cash interest expense amounts recognized by debt instrument for the periods presented:

	Three months ended September 30, 2013					Three months ended September 30, 2012				Nine months ended September 30, 2013				Nine months ended September 30, 2012
	Cash Interest			Non-cash Interest		Cash Interest		Non-cash Interest		Cash Interest		Non-cash Interest		Cash Interest			Non-cash Interest
	(in thousands)					(in thousands)				(in thousands)				(in thousands)
1.875% Convertible Senior Notes	$	—		$	—	$	2,508	$	9,339	$	2,670	$	10,434	$	7,523		$	27,375
4.0% Convertible Senior Notes		4,999			9,570		5,000		8,412		14,999		28,446		15,000			24,448
8.0% Senior Notes		—			—		3,142		35		—		—		15,867			174
8.25% Senior Notes		5,027			46		5,027		42		15,082		135		18,150			149
5.625% Senior Notes		7,031			—		234		—		21,094		—		234			—
5.75% Senior Notes		11,500			—		10,094		—		34,500		—		10,094			—
2010 Secured Tower Revenue Securities		14,349			—		14,344		—		43,037		—		43,032			—
2012 Secured Tower Revenue Securities		4,521			—		2,612		—		13,564		—		2,612			—
2013 Secured Tower Revenue Securities		10,804			—		—		—		19,588		—		—			—
Revolving Credit Facility		856			—		849		—		3,338		—		3,558			—
2011 Term Loan		1,730			16		4,743		45		8,802		85		14,163			134
2012-1 Term Loan		1,123			—		1,403		—		3,516		—		2,262			—
2012-2 Term Loan		1,054			10		94		1		5,362		51		94			1
Mobilitie Bridge Loan		—			—		499		—		—		—		4,239			—
Other		(7	)		—		29		—		17		—		(100	)		—
Total	$	62,987		$	9,642	$	50,578	$	17,874	$	185,569	$	39,151	$	136,728		$	52,281

4.0% Convertible Senior Notes [Member]

Summary of Long-Term Debt

The following table summarizes the balances for the 4.0% Notes:

	As of			As of
	September 30, 2013			December 31, 2012
	(in thousands)
Principal balance	$	499,947		$	499,987
Debt discount		(41,412	)		(69,236	)
Carrying value	$	458,535		$	430,751