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Debt (Tables) | 6 Months Ended
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Jun. 30, 2018
Debt Disclosure [Abstract] |
Schedule of carrying amount and fair value of long-term debt instruments | Long-term debt is as follows:
|  | December 31, 2017 |  |  | June 30, 2018
|  | Debt (inclusive of discount) |  | Unamortized Deferred Financing Costs |  | Carrying Amount |  | Fair Value |  |  | Debt (inclusive of discount) |  | Unamortized Deferred Financing Costs |  | Carrying Amount |  | Fair Value
Revolving Credit Facility(1) |  | $ | 466,593 |  |  | $ | (14,407 | ) |  | $ | 452,186 |  |  | $ | 466,593 |  |  |  | $ | 828,567 |  |  |  | $ | (15,617 | ) |  | $ | 812,950 |  |  | $ | 828,567 |
Term Loan A(1) |  | 243,750 |  |  | — |  |  | 243,750 |  |  | 243,750 |  |  |  | 246,875 |  |  |  | — |  |  | 246,875 |  |  | 246,875 |
Term Loan B(2) |  | — |  |  | — |  |  | — |  |  | — |  |  |  | 696,556 |  |  | (9,367 | ) |  | 687,189 |  |  | 686,031 |
Australian Dollar Term Loan (the "AUD Term Loan")(3) |  | 187,504 |  |  | (3,382 | ) |  | 184,122 |  |  | 189,049 |  |  |  | 248,670 |  |  |  | (3,433 | ) |  | 245,237 |  |  | 250,681 |
4 3/8% Senior Notes due 2021 (the "4 3/8% Notes")(4)(5) |  | 500,000 |  |  | (5,874 | ) |  | 494,126 |  |  | 507,500 |  |  |  | 500,000 |  |  |  | (5,015 | ) |  | 494,985 |  |  | 496,250 |
6% Senior Notes due 2023 (the "6% Notes due 2023")(4) |  | 600,000 |  |  | (6,224 | ) |  | 593,776 |  |  | 625,500 |  |  |  | 600,000 |  |  |  | (5,675 | ) |  | 594,325 |  |  | 613,500 |
5 3/8% CAD Senior Notes due 2023 (the "CAD Notes due 2023")(5)(6) |  | 199,171 |  |  | (3,295 | ) |  | 195,876 |  |  | 208,631 |  |  |  | 190,330 |  |  |  | (2,875 | ) |  | 187,455 |  |  | 191,519 |
5 3/4% Senior Subordinated Notes due 2024 (the "5 3/4% Notes")(4) |  | 1,000,000 |  |  | (9,156 | ) |  | 990,844 |  |  | 1,012,500 |  |  |  | 1,000,000 |  |  |  | (8,469 | ) |  | 991,531 |  |  | 980,000 |
3% Euro Senior Notes due 2025 (the "Euro Notes")(4)(5) |  | 359,386 |  |  | (4,691 | ) |  | 354,695 |  |  | 364,776 |  |  |  | 350,508 |  |  |  | (4,419 | ) |  | 346,089 |  |  | 346,582 |
3 7/8% GBP Senior Notes due 2025 (the "GBP Notes due 2025")(5) |  | 539,702 |  |  | (7,718 | ) |  | 531,984 |  |  | 527,559 |  |  |  | 528,296 |  |  |  | (7,104 | ) |  | 521,192 |  |  | 499,240 |
5 3/8% Senior Notes due 2026 (the "5 3/8% Notes")(5) |  | 250,000 |  |  | (3,615 | ) |  | 246,385 |  |  | 256,875 |  |  |  | 250,000 |  |  |  | (3,400 | ) |  | 246,600 |  |  | 238,125 |
4 7/8% Senior Notes due 2027 (the "4 7/8% Notes")(4)(5) |  | 1,000,000 |  |  | (13,866 | ) |  | 986,134 |  |  | 1,000,000 |  |  |  | 1,000,000 |  |  |  | (13,153 | ) |  | 986,847 |  |  | 921,250 |
5 1/4% Senior Notes due 2028 (the "5 1/4% Notes")(4)(5) |  | 825,000 |  |  | (11,817 | ) |  | 813,183 |  |  | 826,031 |  |  |  | 825,000 |  |  |  | (11,511 | ) |  | 813,489 |  |  | 767,250 |
Real Estate Mortgages, Capital Leases and Other |  | 649,432 |  |  | (566 | ) |  | 648,866 |  |  | 649,432 |  |  |  | 614,145 |  |  |  | (316 | ) |  | 613,829 |  |  | 614,145 |
Accounts Receivable Securitization Program(7) |  | 258,973 |  |  | (356 | ) |  | 258,617 |  |  | 258,973 |  |  |  | 248,473 |  |  |  | (287 | ) |  | 248,186 |  |  | 248,473 |
Mortgage Securitization Program(8) |  | 50,000 |  |  | (1,273 | ) |  | 48,727 |  |  | 50,000 |  |  |  | 50,000 |  |  | (1,200 | ) |  | 48,800 |  |  | 50,000 |
Total Long-term Debt |  | 7,129,511 |  |  | (86,240 | ) |  | 7,043,271 |  |  |  |  |  |  | 8,177,420 |  | — |  | (91,841 | ) |  | 8,085,579 |  |  |
Less Current Portion |  | (146,300 | ) |  | — |  |  | (146,300 | ) |  |  |  |  |  | (123,818 | ) |  | — |  |  | (123,818 | ) |  |  |
Long-term Debt, Net of Current Portion |  | $ | 6,983,211 |  |  | $ | (86,240 | ) |  | $ | 6,896,971 |  |  |  |  |  |  | $ | 8,053,602 |  |  |  | $ | (91,841 | ) |  | $ | 7,961,761 |  |  |  |
______________________________________________________________
(1) | Collectively, as amended as described below, the "Credit Agreement". Of the $828,567 of outstanding borrowings under the Revolving Credit Facility, 618,300 was denominated in United States dollars, 135,000 was denominated in Canadian dollars and 92,000 was denominated in Euros. In addition, we also had various outstanding letters of credit totaling $54,638. The remaining amount available for borrowing under the Revolving Credit Facility as of June 30, 2018 was $866,795 (which amount represents the maximum availability as of such date). The average interest rate in effect under the Credit Agreement was 3.5% as of June 30, 2018. The average interest rate in effect under the Revolving Credit Facility as of June 30, 2018 was 3.5% and ranged from 1.8% to 5.8% and the interest rate in effect under the Term Loan A as of June 30, 2018 was 3.8%.
(2) | Interest rate in effect as of June 30, 2018 was 3.8%. The amount of debt for the Term Loan B (as defined below) reflects an unamortized original issue discount of $1,694 as of June 30, 2018.
(3) | Interest rate in effect as of June 30, 2018 was 6.0%. We had 338,438 Australian dollars outstanding on the AUD Term Loan as of June 30, 2018. The amount of debt for the AUD Term Loan reflects an unamortized original issue discount of $1,545 and $2,011 as of December 31, 2017 and June 30, 2018, respectively.
(4) | Collectively, the "Parent Notes".
(5) | Collectively, the "Unregistered Notes".
(6) | Together, with our previously outstanding 6 1/8% CAD Senior Notes due 2021 (the "CAD Notes due 2021"), the "CAD Notes".
(7) | Interest rate in effect as of June 30, 2018 was 3.0%.
(8) | Interest rate in effect as of June 30, 2018 was 3.5%.
Schedule of Leverage and Fixed Charge Ratios | Our leverage and fixed charge coverage ratios under the Credit Agreement as of December 31, 2017 and June 30, 2018, as well as our leverage ratio under our indentures as of December 31, 2017 and June 30, 2018 are as follows:
| December 31, 2017 |  | June 30, 2018 |  | Maximum/Minimum Allowable
Net total lease adjusted leverage ratio | 5.0 |  |  | 5.6 |  |  | Maximum allowable of 6.5
Net secured debt lease adjusted leverage ratio | 1.6 |  |  | 2.5 |  |  | Maximum allowable of 4.0
Bond leverage ratio (not lease adjusted) | 5.8 |  |  | 5.7 |  |  | Maximum allowable of 6.5-7.0(1)(2)
Fixed charge coverage ratio | 2.1 |  |  | 2.3 |  |  | Minimum allowable of 1.5
______________________________________________________________
(1) | The maximum allowable leverage ratio under our indentures for the 4 7/8% Notes, the GBP Notes due 2025 and the 5 1/4% Notes is 7.0, while the maximum allowable leverage ratio under the indentures pertaining to our remaining senior and senior subordinated notes is 6.5. In certain instances as provided in our indentures, we have the ability to incur additional indebtedness that would result in our bond leverage ratio exceeding the maximum allowable ratio under our indentures and still remain in compliance with the covenant.
(2) | At December 31, 2017, a portion of the net proceeds from the 5 1/4% Notes, together with a portion of the net proceeds of the Equity Offering (as defined in Note 9), were used to temporarily repay approximately $807,000 of outstanding indebtedness under our Revolving Credit Facility until the closing of the IODC Transaction, which occurred on January 10, 2018. The bond leverage ratio at December 31, 2017 is calculated based on our outstanding indebtedness at this date, which reflects the temporary payment of the Revolving Credit Facility.

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