Goodwill And Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2012

Goodwill And Intangible Assets

Changes In Carrying Amount Of Goodwill

		2012		2011
Balance, beginning of period		$	1,229,298	$	894,497
Goodwill acquired, including post acquisition adjustments			429,504		344,089
Disposals			(6,800)		(9,288)
	Balance, end of period	$	1,652,002	$	1,229,298

Schedule of Finite-Lived Intangible Assets

		2012						2011
		Gross						Gross
		Carrying		Accumulated				Carrying		Accumulated
		Amount		Amortization		Net		Amount		Amortization		Net
Deferred financing cost		$	14,523	$	(3,029)	$	11,494	$	6,541	$	(1,838)	$	4,703
Agreements, contracts and other intangible assets			3,448		(2,250)		1,198		3,448		(2,026)		1,422
	Total amortizable intangible assets	$	17,971	$	(5,279)	$	12,692	$	9,989	$	(3,864)	$	6,125