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Debt (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2016 | Dec. 31, 2015
Long-Term Debt, Capital and Financing Leases and Financing Obligations [Line Items] |  |
Debt | $ 6,221,920 | $ 6,122,413
Less current portion | 275,661 | 235,604
Long-term debt | 5,946,259 | 5,886,809
Mortgage Notes Payable [Member] |  |
Long-Term Debt, Capital and Financing Leases and Financing Obligations [Line Items] |  |
Debt | 3,329,740 | 3,246,513
Unamortized debt discount | $ 1,300 | $ 3,300
Maturity date, start | Dec. 31, 2017 |
Maturity date, end | Dec. 31, 2047 |
Weighted average interest rate | 4.58% | 4.51%
Capital Lease Obligations [Member] |  |
Long-Term Debt, Capital and Financing Leases and Financing Obligations [Line Items] |  |
Debt | $ 2,493,210 | $ 2,489,588
Maturity date, start | Dec. 31, 2031 |
Weighted average interest rate | 8.07% | 8.11%
Convertible Debt [Member] |  |
Long-Term Debt, Capital and Financing Leases and Financing Obligations [Line Items] |  |
Debt | $ 285,189 | $ 281,902
Principal | 316,300 | 316,300
Unamortized debt discount | $ 31,100 | $ 34,300
Maturity date, start | Jun. 30, 2018 |
Weighted average interest rate | 2.75% | 2.75%
Construction Financing [Member] |  |
Long-Term Debt, Capital and Financing Leases and Financing Obligations [Line Items] |  |
Debt | $ 15,353 | $ 24,105
Maturity date, start | Dec. 31, 2019 |
Maturity date, end | Dec. 31, 2032 |
Weighted average interest rate | 7.76% | 4.84%
Notes Payable, Insurance Premiums [Member] |  |
Long-Term Debt, Capital and Financing Leases and Financing Obligations [Line Items] |  |
Debt | $ 17,677 | $ 0
Maturity date, start | Dec. 31, 2016 |
Weighted average interest rate | 2.94% |
Other Notes Payable [Member] |  |
Long-Term Debt, Capital and Financing Leases and Financing Obligations [Line Items] |  |
Debt | $ 80,751 | $ 80,305
Maturity date, start | Dec. 31, 2016 |
Maturity date, end | Dec. 31, 2020 |
Weighted average interest rate | 5.24% | 5.16%

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