Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2012

Intangible Assets Exclusive of Goodwill

Intangible assets, exclusive of goodwill, consisted of the following at December 31, 2012:

	Gross  Carrying Amount		Accumulated Amortization			Net Carrying Amount
Amortizable intangible assets:
Long-term franchise agreements and contracts	$	198,779	$	(38,447	)	$	160,332
Customer lists		139,354		(43,457	)		95,897
Non-competition agreements		9,374		(6,815	)		2,559
Other		32,098		(2,621	)		29,477
		379,605		(91,340	)		288,265
Nonamortized intangible assets:
Solid waste collection and transportation permits		151,505		—			151,505
Material recycling facility permits		42,283		—			42,283
E&P facility permits		59,855		—			59,855
		253,643		—			253,643
Intangible assets, exclusive of goodwill	$	633,248	$	(91,340	)	$	541,908

Intangible assets, exclusive of goodwill, consisted of the following at December 31, 2011:

	Gross  Carrying Amount		Accumulated Amortization			Net Carrying Amount
Amortizable intangible assets:
Long-term franchise agreements and contracts	$	190,532	$	(31,592	)	$	158,940
Customer lists		96,501		(28,475	)		68,026
Non-competition agreements		9,374		(6,389	)		2,985
Other		31,603		(3,175	)		28,428
		328,010		(69,631	)		258,379
Nonamortized intangible assets:
Solid waste collection and transportation permits		116,160		—			116,160
Material recycling facility permits		42,283		—			42,283
E&P facility permits		32,759		—			32,759
		191,202		—			191,202
Intangible assets, exclusive of goodwill	$	519,212	$	(69,631	)	$	449,581

Estimated Future Amortization Expense of Amortizable Intangible Assets

Estimated future amortization expense for the next five years relating to amortizable intangible assets is as follows:

For the year ending December 31, 2013	$	25,066
For the year ending December 31, 2014	$	24,412
For the year ending December 31, 2015	$	23,761
For the year ending December 31, 2016	$	19,804
For the year ending December 31, 2017	$	17,832