Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2012

Schedule Of Other Intangible Assets

	December 31,
	2012			2011
	(in thousands)
Finite-lived intangible assets:
Customer lists	$	77,981		$	69,763
Covenants not to compete		26,842			29,441
Trademarks		10,070			9,551
Patents		2,840			2,840
		117,733			111,595
Accumulated amortization		(78,495	)		(69,397	)
		39,238			42,198
Indefinite-lived intangible assets:
Licenses		17,857			17,796
	$	57,095		$	59,994

Estimated Amortization Expense For Finite-Lived Intangible Assets

Year	(in thousands)
2013	$	11,916
2014	$	7,887
2015	$	4,660
2016	$	3,615
2017	$	2,072