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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2014

Fair Value Measurements [Abstract]

Summary Of Accrued Earnout Activity

		2014			2013
		(in thousands)
Beginning balance, December 31, 2013 and 2012, respectively		$	30,063		$	9,840
Additions			10,384			19,342
Payments			(16,346)			(1,310)
Expirations			(573)			(1,863)
Change in estimate			(946)			(105)
Foreign currency translation adjustments			554			61
Ending balance, September 30,		$	23,136		$	25,965

Summary Of Fair Values, Principal Balances, And Carrying Values Of Company's Debt Instruments

		As of September 30, 2014									As of December 31, 2013
		Fair Value			Principal Balance			Carrying Value			Fair Value			Principal Balance			Carrying Value
		(in thousands)
4.000% Convertible Senior Notes due 2014		$	1,325,115		$	367,068		$	367,068		$	1,479,859		$	499,944		$	468,394
8.250% Senior Notes due 2019			—			—			—			262,031			243,750			242,387
5.625% Senior Notes due 2019			507,500			500,000			500,000			514,375			500,000			500,000
5.750% Senior Notes due 2020			814,000			800,000			800,000			832,000			800,000			800,000
4.875% Senior Notes due 2022			729,375			750,000			743,992			—			—			—
4.254% 2010-1 Tower Securities			680,503			680,000			680,000			689,717			680,000			680,000
5.101% 2010-2 Tower Securities			573,392			550,000			550,000			586,586			550,000			550,000
2.933% 2012-1Tower Securities			616,747			610,000			610,000			604,736			610,000			610,000
2.240% 2013-1C Tower Securities			419,598			425,000			425,000			408,442			425,000			425,000
3.722% 2013-2C Tower Securities			570,751			575,000			575,000			530,098			575,000			575,000
3.598% 2013-1D Tower Securities			330,759			330,000			330,000			318,856			330,000			330,000
Revolving Credit Facility			300,000			300,000			300,000			215,000			215,000			215,000
2011 Term Loan			—			—			—			180,980			180,529			180,234
2012-1 Term Loan			175,809			176,250			176,250			184,538			185,000			185,000
2012-2 Term Loan			—			—			—			110,383			109,971			109,745
2014 Term Loan			1,458,844			1,496,250			1,492,778			—			—			—
BNDES Loans			—			—			—			5,847			5,847			5,847
Totals		$	8,502,393		$	7,559,568		$	7,550,088		$	6,923,448		$	5,910,041		$	5,876,607

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Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability.

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Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

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