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Stockholders' Equity (Details) (USD $) | 12 Months Ended |  | 12 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2013 Preferred Stock [Member] | Dec. 31, 2013 Series A Preferred Stock [Member] | May 31, 2012 Stock Repurchase Program 2012 [Member] | Dec. 31, 2013 Stock Repurchase Program 2012 [Member] | Dec. 31, 2012 Stock Repurchase Program 2012 [Member] | Dec. 31, 2013 Stock Repurchase Program 2013 [Member] | Feb. 28, 2014 Stock Repurchase Program 2013 [Member] Subsequent Event [Member]
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Preferred stock, shares authorized (in shares) |  |  |  | 500,000 | 30,000 |  |  |  |  |
Preferred stock, par value (in dollars per share) | $ 20 |  |  |  |  |  |  |  |  |
Preferred stock, voting rights |  |  |  |  | Each share of the Series A Preferred Stock shall entitle the holder to one thousand votes |  |  |  |  |
Preferred stock, shares outstanding (in shares) | 0 | 0 |  |  |  |  |  |  |  |
Stock repurchase program, authorized amount |  |  |  |  |  | $ 5,000,000 |  |  | $ 6,000,000 | $ 10,000,000
Stock repurchased during period (in shares) |  |  |  |  |  |  | 30,601 | 312,527 | 179,372.0 |
Stock repurchased during period | 6,864,000 | 4,999,000 | 4,136,000 |  |  |  | 900,000 | 4,100,000 | 6,000,000 |
Stock repurchase program, remaining authorized amount |  |  |  |  |  |  | $ 0 |  | $ 0 |

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- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. + 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 210.5-02.28) -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 29 -Article 5 + Details
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- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. + 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 210.5-02.28) -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 29 -Article 5 + Details
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- Definition Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased. + 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 210.5-02.28) -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 29 -Article 5 + Details
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- Definition Description of voting rights of nonredeemable preferred stock. Includes eligibility to vote and votes per share owned. Include also, if any, unusual voting rights. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
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