Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets
Cash and cash equivalents	$ 880,601	$ 461,301
Marketable securities	0	239,388
Accounts receivable, net	560,666	428,457
Inventories	525,776	471,879
Prepaid expenses and other current assets	11,807	13,888
Deferred income taxes	32,437	34,169
Total current assets	2,011,287	1,649,082
Property, plant and equipment, net	2,757,557	2,088,014
Equity investments	61,305	66,875
Other assets, net
Intangible assets, net	218,431	159,046
Deferred charges and other assets, net	165,410	97,892
Total other assets, net	383,841	256,938
Total assets	5,213,990	4,060,909
Current liabilities
Accounts payable	261,062	249,613
Accrued liabilities	276,118	155,245
Total current liabilities	537,180	404,858
Long-term debt	763,997	763,879
Deferred income taxes	536,066	437,976
Other liabilities	174,859	35,593
Total liabilities	2,012,102	1,642,306
Commitments and contingencies (Notes 7 and 20)
Stockholders' equity
Preferred stock, $0.01 par value, 50,000,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $0.01 par value, 300,000,000 shares authorized; 134,679,064 and 134,580,208 shares issued at December 31, 2014 and 2013, respectively (Note 8)	1,347	1,346
Common stock, held in treasury, at cost; 1,787,546 and 1,252,922 shares at December 31, 2014 and 2013, respectively (Note 8)	(96,372)	(46,220)
Additional paid-in capital	530,441	511,432
Retained earnings	2,555,528	1,954,661
Accumulated other comprehensive loss	(79,433)	(2,616)
Total Westlake Chemical Corporation stockholders' equity	2,911,511	2,418,603
Noncontrolling interests	290,377	0
Total equity	3,201,888	2,418,603
Total liabilities and equity	$ 5,213,990	$ 4,060,909