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Debt and Other Obligations (Tables) | 6 Months Ended
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Jun. 30, 2016
Debt and Other Obligations [Abstract] |
Schedule of Long-Term Debt Instruments |
| Original Issue Date |  | Contractual Maturity Date (a) |  | Balance as of June 30, 2016(f) |  | Balance as of December 31, 2015(f) |  | Stated Interest Rate as of June 30, 2016(a)
Bank debt - variable rate: |  |  |  |  |  |  |  |  |
2016 Revolver | Jan. 2016 |  | Jan. 2021 |  | $ | 435,000 |  | (b) | $ | — |  |  | 1.8 | %
2016 Term Loan A | Jan. 2016 |  | Jan. 2021 |  | 1,978,041 |  | (b) | — |  |  | 1.9 | %
2012 Revolver | Jan. 2012 |  | Jan. 2019 |  | — |  | (b) | 1,125,000 |  |  | N/A |
Tranche A Term Loans | Jan. 2012 |  | Jan. 2019 |  | — |  | (b) | 627,846 |  |  | N/A |
Tranche B Term Loans | Jan. 2012 |  | Jan. 2021 |  | — |  | (b) | 2,219,602 |  |  | N/A |
Total bank debt |  |  |  |  | 2,413,041 |  |  | 3,972,448 |  |  |
Securitized debt - fixed rate: |  |  |  |  |  |  |  |  |
Secured Notes, Series 2009-1 | July 2009 |  | Aug. 2019 |  | 60,824 |  |  | 70,219 |  |  | 6.3 | %
Secured Notes, Series 2009-2 | July 2009 |  | Aug. 2029 |  | 68,698 |  |  | 68,658 |  |  | 9.0 | %
Tower Revenue Notes, Series 2010-2 | Jan. 2010 |  | Jan. 2037 | (e) | — |  |  | 349,171 |  |  | N/A |
Tower Revenue Notes, Series 2010-3 | Jan. 2010 |  | Jan. 2040 | (c) | 1,243,302 |  |  | 1,242,368 |  |  | 6.1 | %
Tower Revenue Notes, Series 2010-5 | Aug. 2010 |  | Aug. 2037 | (e) | — |  |  | 298,774 |  |  | N/A |
Tower Revenue Notes, Series 2010-6 | Aug. 2010 |  | Aug. 2040 | (c) | 992,648 |  |  | 991,749 |  |  | 4.9 | %
Tower Revenue Notes, Series 2015-1 | May 2015 |  | May 2042 | (c) | 296,254 |  |  | 295,937 |  |  | 3.2 | %
Tower Revenue Notes, Series 2015-2 | May 2015 |  | May 2045 | (c) | 690,764 |  |  | 690,247 |  |  | 3.7 | %
Total securitized debt |  |  |  |  | 3,352,490 |  |  | 4,007,123 |  |  |
Bonds - fixed rate: |  |  |  |  |  |  |  |  |
5.250% Senior Notes | Oct. 2012 |  | Jan. 2023 |  | 1,636,044 |  |  | 1,634,989 |  |  | 5.3 | %
2.381% Secured Notes | Dec. 2012 |  | Dec. 2017 |  | 497,882 |  |  | 497,160 |  |  | 2.4 | %
3.849% Secured Notes | Dec. 2012 |  | Apr. 2023 |  | 990,587 |  |  | 989,895 |  |  | 3.9 | %
4.875% Senior Notes | Apr. 2014 |  | Apr. 2022 |  | 839,448 |  |  | 838,579 |  |  | 4.9 | %
3.400% Senior Notes | Feb./May 2016 |  | Feb. 2021 |  | 849,574 |  | (d)(e) | — |  |  | 3.4 | %
4.450% Senior Notes | Feb. 2016 |  | Feb. 2026 |  | 889,631 |  | (d) | — |  |  | 4.5 | %
3.700% Senior Notes | May 2016 |  | June 2026 |  | 741,314 |  | (e) | — |  |  | 3.7 | %
Total bonds |  |  |  |  | 6,444,480 |  |  | 3,960,623 |  |  |
Other: |  |  |  |  |  |  |  |  |
Capital leases and other obligations | Various |  | Various |  | 216,193 |  |  | 209,765 |  |  | Various |
Total debt and other obligations |  |  |  |  | 12,426,204 |  |  | 12,149,959 |  |  |
Less: current maturities and short-term debt and other current obligations |  |  |  |  | 100,345 |  |  | 106,219 |  |  |
Non-current portion of long-term debt and other long-term obligations |  |  |  |  | $ | 12,325,859 |  |  | $ | 12,043,740 |  |  |
(a) | See the 2015 Form 10-K, including note 8, for additional information regarding the maturity and principal amortization provisions and interest rates relating to the Company's indebtedness.
(b) | In January 2016, the Company completed a Senior Unsecured Credit Facility ("2016 Credit Facility"), comprised of (1) a $2.5 billion Senior Unsecured Revolving Credit Facility ("2016 Revolver") maturing in January 2021, (2) a $2.0 billion Senior Unsecured Term Loan A Facility ("2016 Term Loan A") maturing in January 2021 and (3) a previously outstanding $1.0 billion Senior Unsecured 364-Day Revolving Credit Facility ("364-Day Facility") maturing in January 2017. The 2016 Credit Facility bears interest at a per annum rate equal to LIBOR plus 1.125% to 2.000%, based on the Company's senior unsecured debt rating. The Company used the net proceeds from the 2016 Credit Facility (1) to repay the previously outstanding 2012 Credit Facility and (2) for general corporate purposes. In February 2016, the Company used a portion of the net proceeds from the 2016 Senior Notes offering to repay in full all outstanding borrowings under the previously outstanding 364-Day Facility. As of June 30, 2016, the undrawn availability under the 2016 Revolver was $2.1 billion.
(c) | If the respective series of such debt is not paid in full on or prior to an applicable date then Excess Cash Flow (as defined in the indenture) of the issuers of such notes will be used to repay principal of the applicable series, and additional interest (of an additional approximately 5% per annum) will accrue on the respective series. See the 2015 Form 10-K for additional information regarding these provisions.
(d) | In February 2016, the Company issued $1.5 billion aggregate principal amount of senior unsecured notes ("2016 Senior Notes"), which consist of (1) $600.0 million aggregated principal amount of 3.40% senior notes with a final maturity date of February 2021 and (2) $900.0 million aggregate principal amount of 4.45% senior notes with a final maturity date of February 2026. The Company used net proceeds from the 2016 Senior Notes offering, together with cash on hand, to (1) repay in full all outstanding borrowings under the previously outstanding 364-Day Facility and (2) repay $500.0 million of outstanding borrowings under the 2016 Revolver.
(e) | In May 2016, the Company issued $1.0 billion aggregate principal amount of senior unsecured notes ("May 2016 Senior Notes"), which consist of (1) $250.0 million aggregate principal amount of 3.40% senior notes that were issued pursuant to the same indenture as the 3.40% senior notes of the 2016 Senior Notes with a final maturity date of February 2021 and (2) $750.0 million aggregate principal amount of 3.70% senior notes with a final maturity date of June 2026. The Company used net proceeds from the May 2016 Senior Notes offering to repay in full the Tower Revenue Notes, Series 2010-2 and Series 2010-5, each issued by certain of its subsidiaries, and to repay a portion of the outstanding borrowings under the 2016 Revolver.
(f) | Balances reflect debt issuance costs as a direct reduction from the respective carrying amounts of debt, with the exception of debt issuance costs associated with the Company's revolving credit facilities. See note 2.
Schedule of Maturities of Long-term Debt | Contractual Maturities The following are the scheduled contractual maturities of the total debt and other long-term obligations of the Company outstanding as of June 30, 2016. These maturities reflect contractual maturity dates and do not consider the principal payments that will commence following the anticipated repayment dates on the Tower Revenue Notes.
| Six Months Ending December 31, |  | Years Ending December 31, |  |  |  |  |  | Unamortized Adjustments, Net |  | Total Debt and Other Obligations Outstanding
| 2016 |  | 2017 |  | 2018 |  | 2019 |  | 2020 |  | Thereafter |  | Total Cash Obligations |  |
Scheduled contractual maturities | $ | 49,938 |  |  | $ | 599,019 |  |  | $ | 133,080 |  |  | $ | 137,058 |  |  | $ | 200,788 |  |  | $ | 11,400,756 |  |  | $ | 12,520,639 |  |  | $ | (94,435 | ) |  | $ | 12,426,204 |
Extinguishment of Debt [Line Items] |
Schedule of Extinguishment of Debt [Table Text Block] | Purchases and Redemptions of Long-Term Debt The following is a summary of purchases and redemptions of long-term debt during the six months ended June 30, 2016.
| Six Months Ended June 30, 2016
| Principal Amount |  | Cash Paid(a) |  | Gains (Losses)(b)
2012 Revolver (c) | $ | — |  |  | $ | — |  |  | $ | (1,930 | )
Tranche A Term Loans | 629,375 |  |  | 629,375 |  |  | (1,498 | )
Tranche B Term Loans | 2,247,015 |  |  | 2,247,015 |  |  | (27,122 | )
Tower Revenue Notes, Series 2010-2 | 350,000 |  |  | 352,796 |  |  | (3,338 | )
Tower Revenue Notes, Series 2010-5 | 300,000 |  |  | 307,176 |  |  | (8,129 | )
Total | $ | 3,526,390 |  |  | $ | 3,536,362 |  |  | $ | (42,017 | )
(a) | Exclusive of accrued interest.
(b) | Inclusive of $32.0 million related to the write off of deferred financing costs.
Components of Interest Expense and Amortization of Deferred Financing Costs | Interest Expense and Amortization of Deferred Financing Costs The components of interest expense and amortization of deferred financing costs are as follows:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2016 |  | 2015 |  | 2016 |  | 2015
Interest expense on debt obligations | $ | 125,580 |  |  | $ | 122,398 |  |  | $ | 247,747 |  |  | $ | 245,101 |
Amortization of deferred financing costs and adjustments on long-term debt | 4,815 |  |  | 5,173 |  |  | 9,921 |  |  | 9,911 |
Amortization of interest rate swaps(a) | — |  |  | 7,490 |  |  | — |  |  | 14,981 |
Other, net of capitalized interest | (1,033 | ) |  | (595 | ) |  | (1,928 | ) |  | (1,088 | )
Total | $ | 129,362 |  |  | $ | 134,466 |  |  | $ | 255,740 |  |  | $ | 268,905 |
(a) | Amounts reclassified from "accumulated other comprehensive income (loss)."

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