Debt (Tables)

3 Months Ended

Mar. 31, 2013

Carrying Values of Debt

The carrying and principal values of debt consist of the following:

	Maturity	As of					As of
	Date	March 31, 2013					December 31, 2012
		Principal		Carrying			Principal		Carrying
		Balance		Value			Balance		Value
		(in thousands)
1.875% Convertible Senior Notes	May 1, 2013	$	463,514	$	460,454		$	468,836	$	457,351
4.000% Convertible Senior Notes	Oct. 1, 2014		499,983		439,723			499,987		430,751
8.250% Senior Notes	Aug. 15, 2019		243,750		242,249			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
Revolving Credit Facility	May 9, 2017		100,000		100,000			100,000		100,000
2011 Term Loan B	June 30, 2018		491,250		490,313			492,500		491,518
2012-1 Term Loan A	May 9, 2017		192,500		192,500			195,000		195,000
2012-2 Term Loan B	Sept. 28, 2019		299,250		298,554			300,000		299,278
Total debt			5,430,247		5,363,793			5,440,073		5,356,103
Less: current maturities of long-term debt					(478,454	)				(475,351	)
Total long-term debt, net of current maturities				$	4,885,339				$	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					Three months ended
	March 31, 2013					March 31, 2012
	Cash Interest			Non-cash Interest		Cash Interest			Non-cash Interest
	(in thousands)					(in thousands)
1.875% Convertible Senior Notes	$	2,120		$	8,273	$	2,508		$	8,913
4.0% Convertible Senior Notes		5,000			8,975		5,000			7,890
8.0% Senior Notes		—			—		7,500			81
8.25% Senior Notes		5,027			44		7,734			62
5.625% Senior Notes		7,031			—		—			—
5.75% Senior Notes		11,500			—		—			—
2010 Secured Tower Revenue Securities		14,344			—		14,344			—
2012 Secured Tower Revenue Securities		4,521			—		—			—
Revolving Credit Facility		1,362			—		515			—
2011 Term Loan		4,617			45		4,715			45
2012-1 Term Loan		1,200			—		—			—
2012-2 Term Loan		2,812			27		—			—
Other		(69	)		—		(68	)		—
Total	$	59,465		$	17,364	$	42,248		$	16,991

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
	March 31, 2013			December 31, 2012
	(in thousands)
Principal balance	$	499,983		$	499,987
Debt discount		(60,260	)		(69,236	)
Carrying value	$	439,723		$	430,751