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Shareholders' Equity and Stock-Based Compensation (Details 3) (USD $) | 1 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2012 | Jun. 30, 2012 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Summary of common shares issued, treasury shares and shares outstanding |  |  |  |  |
Balance at the beginning of the period (in shares) |  | 51,073,419 | 51,073,419 | 50,294,000 | 49,368,000
Stock options exercised (in shares) |  |  | 174,000 | 154,000 | 238,000
Share repurchases (in shares) |  |  | (3,606,000) |  |
Restricted stock and restricted stock units (in shares) |  |  | 396,000 | 354,000 | 420,000
Other (in shares) |  |  | 267,000 | 271,000 | 268,000
Balance at the end of the period (in shares) | 48,303,707 |  | 48,303,707 | 51,073,419 | 50,294,000
Common Stock |  |  |  |  |
Authorized shares (in shares) | 200,000,000 |  | 200,000,000 |  |
Par value (in dollars per share) | 10.00 |  | 10.00 |  |
Summary of common shares issued, treasury shares and shares outstanding |  |  |  |  |
Balance at the beginning of the period (in shares) |  | 98,702,000 | 98,702,000 | 98,068,000 | 97,284,000
Stock options exercised (in shares) |  |  | 174,000 | 154,000 | 238,000
Restricted stock and restricted stock units (in shares) |  |  | 311,000 | 209,000 | 278,000
Other (in shares) |  |  | 267,000 | 271,000 | 268,000
Balance at the end of the period (in shares) | 99,454,000 |  | 99,454,000 | 98,702,000 | 98,068,000
Common Stock In Treasury |  |  |  |  |
Summary of common shares issued, treasury shares and shares outstanding |  |  |  |  |
Balance at the beginning of the period (in shares) |  | (47,629,000) | (47,629,000) | (47,774,000) | (47,916,000)
Share repurchases (in shares) | (2,600,000) | (1,000,000) | (3,606,000) |  |
Restricted stock and restricted stock units (in shares) |  |  | 85,000 | 145,000 | 142,000
Balance at the end of the period (in shares) | (51,150,000) |  | (51,150,000) | (47,629,000) | (47,774,000)

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- Definition Face amount or stated value of common stock per share; generally not indicative of the fair market value per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: 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 + Details
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- Definition Total number of shares of common stock held by shareholders. May be all or portion of the number of common shares authorized. These shares represent the ownership interest of the common shareholders. Shares outstanding equals shares issued minus shares held in treasury and other adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: 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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 6: 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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