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Consolidated Statements of Changes in Stockholders' Equity Statement (USD $) In Thousands, except Share data | Total | Common Stock [Member] | Treasury Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Benefits Liability Net Of Tax [Member] | Cumulative Foreign Currency Exchange [Member] | Unrealized Holding Losses On Investments Net Of Tax [Member] | Noncontrolling Interest [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Amount, beginning balance at Dec. 31, 2012 | $ 1,872,256 | $ 1,345 | $ (13,302) | $ 495,581 | $ 1,399,472 | $ (16,351) | $ 5,511 | $ 0 | $ 0
Number of Shares, beginning balance at Dec. 31, 2012 |  | 134,374,448 | 568,986 |  |  |  |  |  |
Net income | 610,425 |  |  |  | 610,425 |  |  |  | 0
Other comprehensive (loss) income | 8,224 |  |  |  |  | 9,655 | (1,607) | 176 | 0
Common stock repurchased, shares |  |  | 683,936 |  |  |  |  |  |
Common stock repurchased | (32,918) |  | (32,918) |  |  |  |  |  | 0
Shares issued - stock- based compensation, shares | 3,437 | 1 |  | 3,436 |  |  |  |  |
Shares issued - stock- based compensation |  | 225,924 |  |  |  |  |  |  |
Stock-based compensation, net of tax on stock options exercised, shares |  | (20,164) |  |  |  |  |  |  |
Stock-based compensation, net of tax on stock options exercised | 12,415 |  |  | 12,415 |  |  |  |  |
Dividends paid | (55,236) |  |  |  | (55,236) |  |  |  |
Amount, ending balance at Dec. 31, 2013 | 2,418,603 | 1,346 | (46,220) | 511,432 | 1,954,661 | (6,696) | 3,904 | 176 | 0
Number of Shares, ending balance at Dec. 31, 2013 |  | 134,580,208 | 1,252,922 |  |  |  |  |  |
Net income | 497,631 |  |  |  | 495,232 |  |  |  | 2,399
Net income | 495,232 |  |  |  |  |  |  |  |
Other comprehensive (loss) income | (33,817) |  |  |  |  | 383 | (37,882) | 3,682 | 0
Common stock repurchased, shares |  |  | 104,163 |  |  |  |  |  |
Common stock repurchased | (9,495) |  | (9,495) |  |  |  |  |  | 0
Shares issued - stock- based compensation, shares | 5,502 | 1 | 2,467 | 3,034 |  |  |  |  |
Shares issued - stock- based compensation |  | 124,566 | (136,541) |  |  |  |  |  |
Stock-based compensation, net of tax on stock options exercised, shares |  | (24,610) |  |  |  |  |  |  |
Stock-based compensation, net of tax on stock options exercised | 13,526 |  |  | 13,526 |  |  |  |  |
Dividends paid | (55,690) |  |  |  | (55,690) |  |  |  |
Issuance of Westlake Chemical Partners LP common units | 286,088 |  |  |  |  |  |  |  | 286,088
Amount, ending balance at Sep. 30, 2014 | $ 3,122,348 | $ 1,347 | $ (53,248) | $ 527,992 | $ 2,394,203 | $ (6,313) | $ (33,978) | $ 3,858 | $ 288,487
Number of Shares, ending balance at Sep. 30, 2014 |  | 134,680,164 | 1,220,544 |  |  |  |  |  |

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