Landfill Accounting (Tables)

6 Months Ended

Jun. 30, 2012

Landfill Accounting [Abstract]

Reconciliation of the Company's final capping, closure and post-closure liability

Final capping, closure and post-closure liability at December 31, 2011	$	30,883
Adjustments to final capping, closure and post-closure liabilities		3,399
Liabilities incurred		1,289
Accretion expense		1,225
Final capping, closure and post-closure liability at June 30, 2012	$	36,796