Other Assets

Amortization expense on intangible and other assets of $19,175 and $9,419 is included in the consolidated statements of operations for the three months ended September 30, 2016 and 2015, respectively. Amortization expense on intangible and other assets of $38,340 and $28,235 is included in the consolidated statements of operations for the nine months ended September 30, 2016 and 2015, respectively.

Goodwill

The gross carrying amounts of goodwill and the changes in the carrying amount of goodwill for the nine months ended September 30, 2016 were as follows:



	Olefins Segment		Vinyls Segment		Total
Balance at December 31, 2015	$	29,990	$	32,026	$	62,016
Goodwill acquired during the period	—		863,144		863,144
Effects of changes in foreign exchange rates	—		540		540
Balance at September 30, 2016	$	29,990	$	895,710	$	925,700