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Debt (Schedule Of Cash And Non-Cash Interest Expense) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended |  | 3 Months Ended | 9 Months Ended |  | 3 Months Ended | 9 Months Ended |  | 3 Months Ended | 9 Months Ended |  | 3 Months Ended | 9 Months Ended |  | 3 Months Ended | 9 Months Ended |  | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended
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Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2013 1.875% Convertible Senior Notes [Member] | Sep. 30, 2014 1.875% Convertible Senior Notes [Member] | Sep. 30, 2014 4.0% Convertible Senior Notes [Member] | Sep. 30, 2013 4.0% Convertible Senior Notes [Member] | Sep. 30, 2014 4.0% Convertible Senior Notes [Member] | Sep. 30, 2013 4.0% Convertible Senior Notes [Member] | Apr. 29, 2009 4.0% Convertible Senior Notes [Member] | Sep. 30, 2014 8.25% Senior Notes [Member] | Sep. 30, 2013 8.25% Senior Notes [Member] | Sep. 30, 2014 8.25% Senior Notes [Member] | Sep. 30, 2013 8.25% Senior Notes [Member] | Jul. 24, 2009 8.25% Senior Notes [Member] | Sep. 30, 2014 5.625% Senior Notes [Member] | Sep. 30, 2013 5.625% Senior Notes [Member] | Sep. 30, 2014 5.625% Senior Notes [Member] | Sep. 30, 2013 5.625% Senior Notes [Member] | Sep. 28, 2012 5.625% Senior Notes [Member] | Sep. 30, 2014 5.75% Senior Notes [Member] | Sep. 30, 2013 5.75% Senior Notes [Member] | Sep. 30, 2014 5.75% Senior Notes [Member] | Sep. 30, 2013 5.75% Senior Notes [Member] | Jul. 13, 2012 5.75% Senior Notes [Member] | Sep. 30, 2014 4.875% Senior Notes [Member] | Sep. 30, 2014 4.875% Senior Notes [Member] | Jul. 01, 2014 4.875% Senior Notes [Member] | Sep. 30, 2014 2010 Secured Tower Revenue Securities [Member] | Sep. 30, 2013 2010 Secured Tower Revenue Securities [Member] | Sep. 30, 2014 2010 Secured Tower Revenue Securities [Member] | Sep. 30, 2013 2010 Secured Tower Revenue Securities [Member] | Sep. 30, 2014 2012 Secured Tower Revenue Securities [Member] | Sep. 30, 2013 2012 Secured Tower Revenue Securities [Member] | Sep. 30, 2014 2012 Secured Tower Revenue Securities [Member] | Sep. 30, 2013 2012 Secured Tower Revenue Securities [Member] | Sep. 30, 2014 2013 Secured Tower Revenue Securities [Member] | Sep. 30, 2013 2013 Secured Tower Revenue Securities [Member] | Sep. 30, 2014 2013 Secured Tower Revenue Securities [Member] | Sep. 30, 2013 2013 Secured Tower Revenue Securities [Member] | Sep. 30, 2014 Revolving Credit Facility [Member] | Sep. 30, 2013 Revolving Credit Facility [Member] | Sep. 30, 2014 Revolving Credit Facility [Member] | Sep. 30, 2013 Revolving Credit Facility [Member] | Sep. 30, 2013 2011 Term Loan [Member] | Sep. 30, 2014 2011 Term Loan [Member] | Sep. 30, 2013 2011 Term Loan [Member] | Sep. 30, 2014 2012-1 Term Loan [Member] | Sep. 30, 2013 2012-1 Term Loan [Member] | Sep. 30, 2014 2012-1 Term Loan [Member] | Sep. 30, 2013 2012-1 Term Loan [Member] | Sep. 30, 2013 2012-2 Term Loan [Member] | Sep. 30, 2014 2012-2 Term Loan [Member] | Sep. 30, 2013 2012-2 Term Loan [Member] | Sep. 30, 2014 2014 Term Loan [Member] | Sep. 30, 2014 2014 Term Loan [Member] | Sep. 30, 2014 Other [Member] | Sep. 30, 2013 Other [Member] | Sep. 30, 2014 Other [Member] | Sep. 30, 2013 Other [Member]
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash Interest | $ 78,170 | $ 62,987 | $ 215,695 | $ 185,569 | $ 2,670 |  | $ 3,675 | $ 4,999 | $ 12,520 | $ 14,999 |  | $ 2,458 | $ 5,027 | $ 12,513 | $ 15,082 |  | $ 7,031 | $ 7,031 | $ 21,094 | $ 21,094 |  | $ 11,500 | $ 11,500 | $ 34,500 | $ 34,500 |  | $ 9,141 | $ 9,141 |  | $ 14,346 | $ 14,349 | $ 43,036 | $ 43,037 | $ 4,521 | $ 4,521 | $ 13,564 | $ 13,564 | $ 10,804 | $ 10,804 | $ 32,413 | $ 19,588 | $ 1,007 | $ 856 | $ 3,279 | $ 3,338 | $ 1,730 | $ 696 | $ 8,802 | $ 1,222 | $ 1,123 | $ 3,336 | $ 3,516 | $ 1,054 | $ 424 | $ 5,362 | $ 12,458 | $ 28,911 | $ 7 | $ (7) | $ 268 | $ 17
Non-cash Interest | $ 8,236 | $ 9,642 | $ 26,832 | $ 39,151 | $ 10,434 |  | $ 7,934 | $ 9,570 | $ 26,266 | $ 28,446 |  | $ 24 | $ 46 | $ 121 | $ 135 |  |  |  |  |  |  |  |  |  |  |  | $ 157 | $ 157 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 16 | $ 7 | $ 85 |  |  |  |  | $ 10 | $ 4 | $ 51 | $ 121 | $ 277 |  |  |  |
Debt instrument, interest rate, stated percentage |  |  |  |  |  | 1.875% | 4.00% |  | 4.00% |  | 4.00% | 8.25% |  | 8.25% |  | 8.25% | 5.625% |  | 5.625% |  | 5.625% | 5.75% |  | 5.75% |  | 5.75% | 4.875% | 4.875% | 4.875% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Represents the portion of cash interest incurred in the period on debt arrangements that was charged against earnings. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Represents the portion of non-cash interest incurred in the period on debt arrangements that was charged against earnings. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: 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(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Details
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