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Fair Value Measurements (Tables) | 9 Months Ended
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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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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19279-110258 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21538-112644 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 + Details
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