Summary of Significant Accounting Policies (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2014 PensionPlan landfill	Dec. 31, 2013	Dec. 31, 2012
Summary of Significant Accounting Policies
Net book credit balances in our primary disbursement accounts	$ 36,400,000	$ 39,600,000
Restricted cash and restricted marketable securities	115,600,000
Capitalized interest	6,400,000	7,300,000	8,400,000
Post-closure period	30 years
Number of closed landfills	125
Asset retirement obligation, costs to discharge, inflation rate	2.30%
Years of historical moving average increase of the U.S. Consumer Price Index used as our basis for inflation rate	10 years
Risk-free rate used for liability recognition	4.50%	5.00%
Debt instrument, term	30 years
Discount rate for acquisition	9.75%
Future estimates of revenue and expense growth rate, minimum range	3.00%
Future estimates of revenue and expense growth rate, maximum range	5.00%
Future estimated effective tax rates	40.00%
Estimated discount rates, minimum range	7.00%
Estimated discount rates, maximum range	8.00%
Fair value of our reporting units exceeded the carrying value of our reporting units, maximum range	50.00%
Number of qualified defined pension plans	1
Percentage of current plan participants benefits frozen upon Allied's acquisition of BFI	97.00%
Minimum [Member]
Summary of Significant Accounting Policies
Interest capitalization, construction costs threshold	$ 50,000
Interest capitalization, construction phase period (in months)	1 month
Interest capitalization, useful life of assets under construction	1 year
Amortization period for other intangible assets	1 year
Maximum [Member]
Summary of Significant Accounting Policies
Amortization period for other intangible assets	21 years