Earnings per Share (Tables)

6 Months Ended

Jun. 30, 2016

Earnings Per Share [Abstract]

Schedule Of Net Income Attributable To Common Stockholders

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
Net income attributable to    Westlake Chemical Corporation	$	111,124		$	205,095		$	234,252		$	351,437
Less:
Net income attributable to participating securities	(504		)	(253		)	(1,054		)	(457		)
Net income attributable to common shareholders	$	110,620		$	204,842		$	233,198		$	350,980

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 June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
Weighted average common shares—basic	129,583,224		132,538,123		129,886,594		132,625,857
Plus incremental shares from:
Assumed exercise of options	397,303		506,852		403,927		498,840
Weighted average common shares—diluted	129,980,527		133,044,975		130,290,521		133,124,697
Earnings per common share attributable to    Westlake Chemical Corporation:
Basic	$	0.85	$	1.55	$	1.80	$	2.65
Diluted	$	0.85	$	1.54	$	1.79	$	2.64