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Stockholders' Equity - Additional Information (Detail) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012
Class of Stock [Line Items] |  |
Common Stock, Shares Authorized | 200,000,000 | 200,000,000
The number of authorized shares of common stock, par value | $ 0.01 | $ 0.01
Business Acquisition Stockholders Rights Plan Exercise Description | The rights will be exercisable only if a person or a group acquires or announces a tender or exchange offer to acquire 20% or more of our common stock or if we enter into other business combination transactions not approved by our board of directors. |
Business Acquisition Stockholders Rights Plan Expire Date | Dec. 28, 2015 |
Business Acquisition Stockholders Rights Plan Redeemable Per Stock | $ 0.01 |
Series D Junior Participating Preferred Stock |  |
Class of Stock [Line Items] |  |
Preferred Stock, Par or Stated Value Per Share | $ 0.01 |
Stock Repurchased During Period, Shares | 300,000 |
Business Acquisition, Share Price | $ 120 |
Preferred stock, shares issued | 0 | 0
Preferred stock, shares outstanding | 0 | 0
Unclassified Preferred Stock |  |
Class of Stock [Line Items] |  |
Preferred Stock, Shares Authorized | 25,000,000 |

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- Definition Face amount or stated value per share of common stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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