Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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+ Details

GOODWILL AND OTHER INTANGIBLE ASSETS, Goodwill balance by reportable segment (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Goodwill [Line Items]
Goodwill	$ 147,347	$ 145,788	$ 145,788
Service Centers [Member]
Goodwill [Line Items]
Goodwill	114,228		112,669
Innovative Pumping Solutions [Member]
Goodwill [Line Items]
Goodwill	15,980		15,980
Supply Chain Services [Member]
Goodwill [Line Items]
Goodwill	$ 17,139		$ 17,139