Goodwill and Other Intangible Assets, Net (Tables)

12 Months Ended

Dec. 31, 2012

Goodwill and Other Intangible Assets, Net [Abstract]

Components of goodwill and other intangible assets, net

The components of goodwill and other intangible assets, net at December 31, 2012 and 2011 were as follows (in thousands):

	2012			2011
Goodwill	$	440,709		$	377,281
Intangibles:
Client lists		168,699			128,537
Other intangibles		9,644			9,826
Total intangibles		178,343			138,363
Total goodwill and other intangibles assets		619,052			515,644
Accumulated amortization:
Client lists		(62,115	)		(50,969	)
Other intangibles		(5,718	)		(6,335	)
Total accumulated amortization		(67,833	)		(57,304	)
Goodwill and other intangible assets, net	$	551,219		$	458,340

Changes in carrying amount of goodwill by operating segment

Changes in the carrying amount of goodwill by operating segment for the years ended December 31, 2012 and 2011 were as follows (in thousands):

	Financial Services			Employee Services			Medical Management Professionals		National Practices		Total Goodwill
December 31, 2010	$	203,441		$	79,132		$	59,847	$	1,666	$	344,086
Additions		30,002			5,645			—		—		35,647
Divestitures		(280	)		(2,172	)		—		—		(2,452	)
December 31, 2011	$	233,163		$	82,605		$	59,847	$	1,666	$	377,281
Additions		26,620			32,493			4,315		—		63,428
Divestitures		—			—			—		—		—
December 31, 2012	$	259,783		$	115,098		$	64,162	$	1,666	$	440,709

Amortization expense related to client lists and other intangible assets

Amortization expense related to client lists and other intangible assets for the years ended December 31, 2012, 2011 and 2010 was as follows (in thousands):

	2012		2011		2010
Operating expenses	$	15,242	$	13,750	$	13,016
Corporate general and administrative expenses		16		17		16
Total amortization expense	$	15,258	$	13,767	$	13,032

Amortization expense for existing client lists and other intangible assets

Amortization expense for existing client lists and other intangible assets for each of the next five years ending December 31 is estimated to be (in thousands):

2013	$	17,122
2014	$	16,569
2015	$	15,219
2016	$	13,337
2017	$	12,309