GOODWILL AND INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill by operating and reportable segment

Goodwill, and the changes in the carrying amount of goodwill by operating and reportable segment for the years ended December 31, 2014 and 2013, are as follows (in thousands):

	Infusion Services		PBM Services		Total
Balance at December 31, 2012	$	304,282	$	12,744	$	317,026
Acquisitions	254,304		—		254,304
Other adjustments	7		—		7
Balance at December 31, 2013	558,593		12,744		571,337
Other adjustments	1,986		—		1,986
Balance at December 31, 2014	$	560,579	$	12,744	$	573,323

Intangible assets

Intangible assets consisted of the following as of December 31, 2014 and 2013 (in thousands):

	December 31, 2014							December 31, 2013
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Finite Lived Assets
Infusion customer relationships	25,650		(16,615		)	9,035		25,650		(12,062		)	13,588
Infusion trademarks	6,200		(5,333		)	867		6,200		(3,514		)	2,686
Non-compete agreements	1,500		(1,133		)	367		1,500		(950		)	550
	$	33,350	$	(23,081	)	$	10,269	$	33,350	$	(16,526	)	$	16,824

Finite lived intangible assets estimated useful lives

Finite lived intangible assets are amortized on a straight-line basis over their estimated useful lives as follows:

	Estimated Useful Life
Infusion customer relationships	5	months	-	4	years
Infusion trademarks	23	months	-	3	years
Non-compete agreements	1	year	-	5	years

Estimated amortization expense

Total amortization expense of intangible assets was $6.6 million, $6.7 million, and $4.0 million for the years ended December 31, 2014, 2013, and 2012, respectively. Amortization expense is expected to be the following (in thousands):

Year ending December 31,	Estimated Amortization
2015	$	5,142
2016	3,078
2017	1,983
2018	66
2019	—
Thereafter	$	—
Total estimated amortization expense	$	10,269