Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2017

Changes in stockholders' equity for the nine months ended September 30, 2017 and 2016 were as follows:



	Common Stock		Common Stock, Held in Treasury			Additional Paid-in Capital			Retained Earnings			Accumulated Other Comprehensive Income (Loss)			Noncontrolling Interests			Total
Balances at December 31, 2016	$	1,347	$	(319,339	)	$	550,641		$	3,412,286		$	(121,306	)	$	368,416		$	3,892,045
Net income	—		—			—			501,849			—			21,429			523,278
Other comprehensive income (loss), net of income taxes:
Pension and other post- retirement benefits liability	—		—			—			—			1,057			(44		)	1,013
Foreign currency translation adjustments	—		—			—			—			106,563			2,952			109,515
Other	—		—			—			—			(260		)	—			(260		)
Shares issued—stock- based compensation	—		4,645			(2,441		)	—			—			—			2,204
Stock-based compensation, net of tax on stock options exercised	—		—			10,223			—			—			—			10,223
Dividends declared	—		—			—			(76,491		)	—			—			(76,491		)
Distributions to noncontrolling interests	—		—			—			—			—			(20,767		)	(20,767		)
Issuance of Westlake Chemical Partners LP common units	—		—			—			—			—			110,739			110,739
Balances at September 30, 2017	$	1,347	$	(314,694	)	$	558,423		$	3,837,644		$	(13,946	)	$	482,725		$	4,551,499



	Common Stock		Common Stock, Held in Treasury			Additional Paid-in Capital			Retained Earnings			Accumulated Other Comprehensive Income (Loss)			Noncontrolling Interests			Total
Balances at December 31, 2015	$	1,347	$	(258,312	)	$	542,148		$	3,109,987		$	(129,292	)	$	296,053		$	3,561,931
Net income	—		—			—			299,914			—			14,656			314,570
Other comprehensive income (loss), net of income taxes
Pension and other post- retirement benefits liability	—		—			—			—			409			—			409
Foreign currency translation adjustments	—		—			—			—			15,758			—			15,758
Net unrealized holding gains on investments	—		—			—			—			4,999			—			4,999
Common stock repurchased	—		(66,725		)	—			—			—			—			(66,725		)
Shares issued—stock- based compensation	—		5,057			(3,407		)	—			—			—			1,650
Stock-based compensation, net of tax on stock options exercised	—		—			7,778			—			—			—			7,778
Dividends declared	—		—			—			(71,933		)	—			—			(71,933		)
Distributions to noncontrolling interests	—		—			—			—			—			(12,300		)	(12,300		)
Noncontrolling interest in acquired business	—		—			—			—			—			68,000			68,000
Balances at September 30, 2016	$	1,347	$	(319,980	)	$	546,519		$	3,337,968		$	(108,126	)	$	366,409		$	3,824,137

Schedule of Accumulated Other Comprehensive Income (Loss)

Changes in accumulated other comprehensive income (loss) by component for the nine months ended September 30, 2017 and 2016 were as follows:



	Benefits Liability, Net of Tax		Cumulative Foreign Currency Exchange, Net of Tax			Net Unrealized Holding Gains (Losses) on Investments, Net of Tax			Total
Balances at December 31, 2016	$	28,945	$	(150,202	)	$	(49	)	$	(121,306	)
Other comprehensive income (loss) before reclassifications	—		106,563			(260		)	106,303
Amounts reclassified from accumulated other comprehensive loss	1,057		—			—			1,057
Net other comprehensive income (loss) for the period	1,057		106,563			(260		)	107,360
Balances at September 30, 2017	$	30,002	$	(43,639	)	$	(309	)	$	(13,946	)



	Benefits Liability, Net of Tax			Cumulative Foreign Currency Exchange, Net of Tax			Net Unrealized Holding Gains (Losses) on Investments, Net of Tax			Total
Balances at December 31, 2015	$	(8,607	)	$	(115,690	)	$	(4,995	)	$	(129,292	)
Other comprehensive income (loss) before reclassifications	(252		)	15,758			57,550			73,056
Amounts reclassified from accumulated other comprehensive loss (income)	661			—			(52,551		)	(51,890		)
Net other comprehensive income for the period	409			15,758			4,999			21,166
Balances at September 30, 2016	$	(8,198	)	$	(99,932	)	$	4		$	(108,126	)

Reclassification out of Accumulated Other Comprehensive Income (Loss)

The following table provides the details of the amounts reclassified from accumulated other comprehensive income (loss) into net income in the consolidated statements of operations for the three and nine months ended September 30, 2017 and 2016:



Details about Accumulated Other Comprehensive Income (Loss) Components	Location of Reclassification (Income (Expense)) in Consolidated Statements of Operations	Three Months Ended September 30,						Nine Months Ended September 30,
		2017			2016			2017			2016
Amortization of pension and other post-retirement items
Net loss	(1)	$	(529	)	$	(369	)	$	(1,600	)	$	(1,072	)
	Benefit from income taxes	193			141			543			411
		(336		)	(228		)	(1,057		)	(661		)
Net unrealized gains on available-for-sale investments
Realized gain on available-for-sale investments	Other income, net	—			52,401			—			53,720
	Provision for income taxes	—			(696		)	—			(1,169		)
		—			51,705			—			52,551
Total reclassifications for the period		$	(336	)	$	51,477		$	(1,057	)	$	51,890

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(1)	These accumulated other comprehensive loss components are included in the computation of net periodic benefit cost. For additional information, please read Note 13 (Employee Benefits) to the consolidated financial statements included in the 2016 Form 10-K.