Goodwill and Other Intangible Assets, Net (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Components of Goodwill and Other Intangible Assets, Net

The components of goodwill and other intangible assets, net at December 31, 2015 and 2014 were as follows (in thousands):


	2015			2014
Goodwill	$	447,685		$	435,231
Intangibles:
Client lists		147,706			140,187
Other intangibles		6,977			6,482

Total intangibles		154,683			146,669

Total goodwill and other intangibles assets		602,368			581,900
Accumulated amortization:
Client lists		(65,037	)		(54,213	)
Other intangibles		(1,678	)		(1,225	)

Total accumulated amortization		(66,715	)		(55,438	)

Goodwill and other intangible assets, net	$	535,653		$	526,462

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, 2015 and 2014 were as follows (in thousands):


	Financial Services			Employee Services		National Practices		Total Goodwill
December 31, 2013	$	260,715		$	122,316	$	1,666	$	384,697
Additions		9,452			42,619		—		52,071
Divestitures		(1,537	)		—		—		(1,537	)

December 31, 2014	$	268,630		$	164,935	$	1,666	$	435,231
Additions		409			13,599		—		14,008
Divestitures		(1,554	)		—		—		(1,554	)

December 31, 2015	$	267,485		$	178,534	$	1,666	$	447,685

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, 2015, 2014 and 2013 was as follows (in thousands):


	2015		2014		2013
Operating expenses	$	14,714	$	14,462	$	13,520
Corporate general and administrative expenses		17		16		15

Total amortization expense	$	14,731	$	14,478	$	13,535

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):


2016	$	14,871
2017	$	14,410
2018	$	13,360
2019	$	9,376
2020	$	8,306