Schedule of closure and post-closure liabilities |
The changes to closure and post-closure liabilities (also referred to as "asset retirement obligations") from January 1, 2011 through December 31, 2012 were as follows (in thousands): | | | | | | | | | | | | | | Landfill Retirement Liability | | Non-Landfill Retirement Liability | | Total | Balance at January 1, 2011 | $ | 29,756 |
| | $ | 8,923 |
| | $ | 38,679 |
| Liabilities assumed in acquisitions | — |
| | 202 |
| | 202 |
| New asset retirement obligations | 2,469 |
| | — |
| | 2,469 |
| Accretion | 2,255 |
| | 1,126 |
| | 3,381 |
| Changes in estimates recorded to statement of income | (822 | ) | | (580 | ) | | (1,402 | ) | Changes in estimates recorded to balance sheet | (4,232 | ) | | 292 |
| | (3,940 | ) | Expenditures | (3,597 | ) | | (935 | ) | | (4,532 | ) | Currency translation and other | (65 | ) | | 89 |
| | 24 |
| Balance at December 31, 2011 | 25,764 |
| | 9,117 |
| | 34,881 |
| Liabilities assumed in Safety-Kleen acquisition | — |
| | 17,753 |
| | 17,753 |
| New asset retirement obligations | 3,257 |
| | — |
| | 3,257 |
| Accretion | 2,897 |
| | 1,096 |
| | 3,993 |
| Changes in estimates recorded to statement of income | 133 |
| | 1,061 |
| | 1,194 |
| Changes in estimates recorded to balance sheet | (3,086 | ) | | 15 |
| | (3,071 | ) | Expenditures | (2,382 | ) | | (1,463 | ) | | (3,845 | ) | Currency translation and other | 75 |
| | 11 |
| | 86 |
| Balance at December 31, 2012 | $ | 26,658 |
| | $ | 27,590 |
| | $ | 54,248 |
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Schedule of Expected Payments Related to Asset Retirement Obligations [Table Text Block] |
Anticipated payments (based on current estimated costs and anticipated timing of necessary regulatory approvals to commence work on closure and post-closure activities) for each of the next five years and thereafter are as follows (in thousands): | | | | | Year ending December 31, | | 2013 | $ | 9,501 |
| 2014 | 9,830 |
| 2015 | 7,663 |
| 2016 | 5,216 |
| 2017 | 5,850 |
| Thereafter | 261,385 |
| Undiscounted closure and post-closure liabilities | 299,445 |
| Less: Discount at credit-adjusted risk-free rate | (156,559 | ) | Less: Undiscounted estimated closure and post-closure liabilities relating to airspace not yet consumed | (88,638 | ) | Present value of closure and post-closure liabilities | $ | 54,248 |
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