INTANGIBLE ASSETS

9 Months Ended

Sep. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

The Company had goodwill in the amount of $504,094 and $447,995 as of September 30, 2019 and December 31, 2018, respectively, subject to the provisions of ASC 350, “Intangibles-Goodwill and Other.” The increase in goodwill is primarily the result of the acquisition of Chemogas, partially offset by a reduction of goodwill related to an insignificant sale of a portion of the Company's business, with the remaining change due to foreign exchange translation adjustments. Refer to Note 2, "Significant Acquisitions and Divestitures," for more information.

Identifiable intangible assets with finite lives at September 30, 2019 and December 31, 2018 are summarized as follows:



	Amortization Period (in years)	Gross Carrying Amount at 9/30/2019		Accumulated Amortization at 9/30/2019		Gross Carrying Amount at 12/31/2018		Accumulated Amortization at 12/31/2018
Customer relationships & lists	10-20	$	230,243	$	135,158	$	192,185	$	122,545
Trademarks & trade names	2-17	40,773		19,408		39,934		16,755
Developed technology	5-10	15,740		10,429		13,338		8,604
Other	3-18	20,420		7,784		18,333		6,481
		$	307,176	$	172,779	$	263,790	$	154,385

Amortization of identifiable intangible assets was approximately $6,753 and $18,723 for the three and nine months ended September 30, 2019, respectively, and $6,208 and $18,680 for the three and nine months ended September 30, 2018, respectively. Assuming no change in the gross carrying value of identifiable intangible assets, estimated amortization expense is $7,069 for the remainder of 2019, $26,112 for 2020, $22,405 for 2021, $20,546 for 2022, $17,979 for 2023 and $9,076 for 2024. At September 30, 2019 and 2018, there were no identifiable intangible assets with indefinite useful lives as defined by ASC 350. Identifiable intangible assets are reflected in “Intangible assets with finite lives, net” in the Company’s condensed consolidated balance sheets. There were no changes to the useful lives of intangible assets subject to amortization during the nine months ended September 30, 2019 and 2018.