Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Significant Accounting Policies [Line Items]
Bad Debt Expense	$ 4,634,000	$ 7,079,000	$ 7,524,000
Debt instruments, fair value	1,390,000,000
Long-term debt	$ 1,356,084,000	$ 1,384,639,000
Maximum
Significant Accounting Policies [Line Items]
Maximum percentage of account receivable from a single customer	2.00%
Customer relationships
Significant Accounting Policies [Line Items]
Finite lived intangible assets useful life, Weighted average	26 years 6 months
Customer relationships | Minimum
Significant Accounting Policies [Line Items]
Finite lived intangible assets useful lives (in years)	14 years	14 years
Customer relationships | Maximum
Significant Accounting Policies [Line Items]
Finite lived intangible assets useful lives (in years)	40 years	40 years
Covenants not-to-compete
Significant Accounting Policies [Line Items]
Finite lived intangible assets useful life, Weighted average	4 years 7 months 6 days
Covenants not-to-compete | Minimum
Significant Accounting Policies [Line Items]
Finite lived intangible assets useful lives (in years)	4 years
Covenants not-to-compete | Maximum
Significant Accounting Policies [Line Items]
Finite lived intangible assets useful lives (in years)	14 years
Tradenames
Significant Accounting Policies [Line Items]
Finite lived intangible assets useful life, Weighted average	9 years 7 months 6 days
Tradenames | Minimum
Significant Accounting Policies [Line Items]
Finite lived intangible assets useful lives (in years)	10 years
Tradenames | Maximum
Significant Accounting Policies [Line Items]
Finite lived intangible assets useful lives (in years)	40 years
Containers
Significant Accounting Policies [Line Items]
Weighted average remaining useful life	12 years 2 months 12 days