Earnings per Share (Tables)

3 Months Ended

Mar. 31, 2015

Earnings Per Share [Abstract]

Schedule Of Net Income Attributable To Common Stockholders

	Three Months Ended March 31,
	2015			2014
Net income attributable to Westlake Chemical Corporation	$	146,342		$	158,032
Less:
Net income attributable to participating securities	(200		)	(384		)
Net income attributable to common shareholders	$	146,142		$	157,648

Reconciliation Of Denominator For Basic And Diluted Earnings Per Share

The following table reconciles the denominator for the basic and diluted earnings per share computations shown in the consolidated statements of operations:

	Three Months Ended March 31,
	2015		2014
Weighted average common shares—basic	132,714,566		133,072,254
Plus incremental shares from:
Assumed exercise of options	490,740		540,670
Weighted average common shares—diluted	133,205,306		133,612,924
Earnings per common share attributable to Westlake Chemical Corporation :
Basic	$	1.10	$	1.18
Diluted	$	1.10	$	1.18