Investment in Affiliates and Other Assets - Investment in Affiliates and Other Assets (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Investment in Basic Management and The Landwell Company	Dec. 31, 2012 Investment in Basic Management and The Landwell Company	Dec. 31, 2012 Basic Management Inc And Landwell	Sep. 30, 2012 Basic Management Inc And Landwell	Dec. 31, 2013 Capitalized Operating Permits	Dec. 31, 2012 Capitalized Operating Permits
Other Noncurrent Assets [Line Items]
Investment in affiliates	$ 102,300,000	$ 126,100,000	$ 102,300,000	$ 109,900,000	$ 16,200,000
Other assets:
Investment in undeveloped land and water rights						42,000,000
Land held for development	158,100,000					12,700,000
Waste disposal site operating permits, net	59,500,000	65,700,000					59,500,000	65,700,000
Restricted cash	33,300,000	20,900,000
IBNR receivables	6,900,000	6,700,000
Capital lease deposit	6,200,000	6,200,000
Intangible assets	5,200,000	200,000
Deferred financing costs	2,600,000	7,000,000
Assets held for sale	1,100,000	2,600,000
Other	63,800,000	46,700,000
Total	$ 336,700,000	$ 156,000,000