Fair Value Measurements (Summary Of Fair Values, Principal Balances, And Carrying Values Of Company's Debt Instruments) (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended	12 Months Ended	0 Months Ended
	May 16, 2008	Dec. 31, 2014	Jul. 24, 2009	Sep. 28, 2012	Jul. 13, 2012	Jul. 01, 2014	Apr. 16, 2010	Aug. 09, 2012	Apr. 18, 2013	Oct. 15, 2014	Dec. 31, 2013	Apr. 24, 2009	Dec. 31, 2012
Fair Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		7,887,202									$ 6,923,448
Principal Balance [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		7,870,000									5,910,041
Carrying Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		7,860,799									5,876,607
1.875% Convertible Senior Notes [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument stated percentage	1.875%	1.875%
Debt Instrument Maturity Date	May 01, 2013
4.0% Convertible Senior Notes [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument stated percentage		4.00%								4.00%		4.00%
Debt Instrument Maturity Date		Oct. 01, 2014
4.0% Convertible Senior Notes [Member] | Fair Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value											1,479,859
4.0% Convertible Senior Notes [Member] | Principal Balance [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value											499,944
4.0% Convertible Senior Notes [Member] | Carrying Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value											468,394
8.25% Senior Notes [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument stated percentage		8.25%	8.25%
Debt Instrument Maturity Date		Aug. 15, 2019	Aug. 15, 2019
8.25% Senior Notes [Member] | Fair Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value											262,031
8.25% Senior Notes [Member] | Principal Balance [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value											243,750
8.25% Senior Notes [Member] | Carrying Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value											242,387
5.625% Senior Notes [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument stated percentage		5.625%		5.625%
Debt Instrument Maturity Date		Oct. 01, 2019		Oct. 01, 2019
5.625% Senior Notes [Member] | Fair Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		511,250									514,375
5.625% Senior Notes [Member] | Principal Balance [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		500,000									500,000
5.625% Senior Notes [Member] | Carrying Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		500,000									500,000
5.75% Senior Notes [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument stated percentage		5.75%			5.75%						5.75%
Debt Instrument Maturity Date		Jul. 15, 2020			Jul. 15, 2020
5.75% Senior Notes [Member] | Fair Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		816,000									832,000
5.75% Senior Notes [Member] | Principal Balance [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		800,000									800,000
5.75% Senior Notes [Member] | Carrying Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		800,000									800,000
4.875% Senior Notes [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument stated percentage		4.875%				4.875%							4.875%
Debt Instrument Maturity Date		Jul. 15, 2022				Jul. 15, 2022
4.875% Senior Notes [Member] | Fair Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		721,875
4.875% Senior Notes [Member] | Principal Balance [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		750,000
4.875% Senior Notes [Member] | Carrying Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		744,150
4.254% 2010-1 Tower Securities [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument stated percentage		4.254%					4.254%
Debt Instrument Maturity Date		Apr. 15, 2015					Apr. 16, 2040
4.254% 2010-1 Tower Securities [Member] | Fair Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value											689,717
4.254% 2010-1 Tower Securities [Member] | Principal Balance [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value											680,000
4.254% 2010-1 Tower Securities [Member] | Carrying Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value											680,000
5.101% 2010-2 Tower Securities [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument stated percentage		5.101%					5.101%
Debt Instrument Maturity Date		Apr. 17, 2017					Apr. 15, 2042
5.101% 2010-2 Tower Securities [Member] | Fair Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		576,901									586,586
5.101% 2010-2 Tower Securities [Member] | Principal Balance [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		550,000									550,000
5.101% 2010-2 Tower Securities [Member] | Carrying Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		550,000									550,000
2.933% 2012-1 Tower Securities [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument stated percentage		2.933%						2.933%
Debt Instrument Maturity Date		Dec. 15, 2017						Dec. 15, 2042
2.933% 2012-1 Tower Securities [Member] | Fair Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		620,175									604,736
2.933% 2012-1 Tower Securities [Member] | Principal Balance [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		610,000									610,000
2.933% 2012-1 Tower Securities [Member] | Carrying Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		610,000									610,000
2.240% 2013-1C Tower Securities [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument stated percentage		2.24%							2.24%
Debt Instrument Maturity Date		Apr. 16, 2018							Apr. 17, 2043
2.240% 2013-1C Tower Securities [Member] | Fair Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		420,776									408,442
2.240% 2013-1C Tower Securities [Member] | Principal Balance [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		425,000									425,000
2.240% 2013-1C Tower Securities [Member] | Carrying Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		425,000									425,000
3.722% 2013-2C Tower Securities [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument stated percentage		3.722%							3.722%
Debt Instrument Maturity Date		Apr. 17, 2023							Apr. 17, 2048
3.722% 2013-2C Tower Securities [Member] | Fair Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		584,344									530,098
3.722% 2013-2C Tower Securities [Member] | Principal Balance [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		575,000									575,000
3.722% 2013-2C Tower Securities [Member] | Carrying Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		575,000									575,000
3.598% 2013-1D Tower Securities [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument stated percentage		3.598%							3.598%
Debt Instrument Maturity Date		Apr. 16, 2018							Apr. 17, 2043
3.598% 2013-1D Tower Securities [Member] | Fair Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		330,551									318,856
3.598% 2013-1D Tower Securities [Member] | Principal Balance [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		330,000									330,000
3.598% 2013-1D Tower Securities [Member] | Carrying Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		330,000									330,000
2.898% 2014-1C Tower Securities [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument stated percentage		2.898%								2.898%
Debt Instrument Maturity Date		Oct. 15, 2019								Oct. 17, 2044
2.898% 2014-1C Tower Securities [Member] | Fair Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		920,515
2.898% 2014-1C Tower Securities [Member] | Principal Balance [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		920,000
2.898% 2014-1C Tower Securities [Member] | Carrying Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		920,000
3.869% 2014-2C Tower Securities [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument stated percentage		3.869%								3.869%
Debt Instrument Maturity Date		Oct. 15, 2024								Oct. 15, 2049
3.869% 2014-2C Tower Securities [Member] | Fair Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		629,474
3.869% 2014-2C Tower Securities [Member] | Principal Balance [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		620,000
3.869% 2014-2C Tower Securities [Member] | Carrying Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		620,000
Revolving Credit Facility [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt Instrument Maturity Date		May 09, 2017
Revolving Credit Facility [Member] | Fair Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		125,000									215,000
Revolving Credit Facility [Member] | Principal Balance [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		125,000									215,000
Revolving Credit Facility [Member] | Carrying Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		125,000									215,000
2011 Term Loan [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt Instrument Maturity Date		Jun. 30, 2018
2011 Term Loan [Member] | Fair Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value											180,980
2011 Term Loan [Member] | Principal Balance [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value											180,529
2011 Term Loan [Member] | Carrying Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value											180,234
2012-1 Term Loan [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt Instrument Maturity Date		May 09, 2017
2012-1 Term Loan [Member] | Fair Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		171,422									184,538
2012-1 Term Loan [Member] | Principal Balance [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		172,500									185,000
2012-1 Term Loan [Member] | Carrying Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		172,500									185,000
2012-2 Term Loan [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt Instrument Maturity Date		Sep. 28, 2019
2012-2 Term Loan [Member] | Fair Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value											110,383
2012-2 Term Loan [Member] | Principal Balance [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value											109,971
2012-2 Term Loan [Member] | Carrying Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value											109,745
2014 Term Loan [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt Instrument Maturity Date		Mar. 24, 2021
2014 Term Loan [Member] | Fair Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		1,458,919
2014 Term Loan [Member] | Principal Balance [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		1,492,500
2014 Term Loan [Member] | Carrying Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value		1,489,149
BNDES Loans [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value											5
BNDES Loans [Member] | Fair Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value											5,847
BNDES Loans [Member] | Principal Balance [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value											5,847
BNDES Loans [Member] | Carrying Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Debt instrument, Fair Value											$ 5,847