Business Combinations (Tables)

12 Months Ended

Dec. 31, 2011

Business Combinations [Abstract]

Acquisition Date Fair Values Of Total Consideration Transferred

	2011		2010		2009
	(In thousands)
Cash consideration, net of cash acquired (1)	$	108,247	$	11,375	$	5,077
Contingent consideration		21,595		4,195		6,070
Deferred acquisition obligations		24,213		3,438		563
	$	154,055	$	19,008	$	11,710

(1) Included in 2011 is $2.8 million related to an acquisition closed in December 2010 and paid in January 2011.

Summary Of Estimated Fair Values Of Assets And Liabilities Assumed At Acquisition Date

	2011			2010			2009
	(In thousands)
Current assets, net of cash acquired	$	14,218		$	697		$	3
Property and equipment		6,854			4,817			83
Intangible assets		29,565			85			260
Goodwill		131,900			14,661			11,398
Assumption of liabilities		(26,993	)		(265	)		(23	)
Deferred revenue		(1,489	)		(987	)		(11	)
	$	154,055		$	19,008		$	11,710