GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2012

GOODWILL AND OTHER INTANGIBLE ASSETS [Abstract]

Goodwill and Other Intangible Assets

The following table presents the changes in the carrying amount of goodwill and other intangible assets during the year ended December 31, 2012 (in thousands):

	Goodwill			Other Intangible Assets			Total
Balance as of December 31, 2011	$	101,764		$	43,194		$	144,958
Acquired during the year		44,074			30,831			74,905
Adjustments to prior year estimates		(50	)		50			-
Amortization		-			(10,886	)		(10,886	)
Balance as of December 31, 2012	$	145,788		$	63,189		$	208,977

The following table presents the changes in the carrying amount of goodwill and other intangible assets during the year ended December 31, 2011 (in thousands):

	Goodwill	Other Intangible Assets		Total
Balance as of December 31, 2010	84,942	32,236		117,178
Acquired during the year	15,822	17,530		33,352
Payment of earnout	1,000	-		1,000
Amortization	-	(6,572	)	(6,572)
Balance as of December 31, 2011	$ 101,764	$ 43,194		$ 144,958

Goodwill balance by reportable segment

The following table presents goodwill balance by reportable segment as of December 31, 2012 and 2011 (in thousands):

	As of December 31,
	2012	2011
Service Centers	$  121,901	$   77,877
Innovative Pumping Solutions	15,980	15,980
Supply Chain Services	7,907	7,907
Total	$  145,788	$ 101,764

Amortizable Other Intangible Assets

The following table presents a summary of amortizable other intangible assets (in thousands):

	As of December 31, 2012			As of December 31, 2011
	Gross Carrying Amount	Accumulated Amortization	Carrying Amount, net	Gross Carrying Amount	Accumulated Amortization	Carrying Amount, net
Vendor agreements	$    2,496	$   (1,081)	$    1,415	$   2,496	$      (956)	$   1,540
Customer relationships	90,851	(30,010)	60,841	64,262	(23,508)	40,754
Non-compete agreements	1,541	(608)	933	2,611	(1,711)	900
Total	$ 94,888	$ (31,699)	$  63,189	$ 69,369	$ (26,175)	$ 43,194

Estimated future annual amortization of intangible assets

Other intangible assets are generally amortized on a straight-line basis over their estimated useful lives. The estimated future annual amortization of intangible assets for each of the next five years and thereafter are as follows (in thousands):

2013	11,747
2014	11,473
2015	10,039
2016	7,735
2017	7,686
Thereafter	14,509