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Consolidated Balance Sheets (Parenthetical) (USD $) | Jun. 30, 2011 | Dec. 31, 2010 | Jun. 30, 2010
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Class A Common Stock [Member] |  |  |  |  |
Common stock, par value | $ 1 | $ 1 | [1] | $ 1 | [2]
Common stock, shares issued | 8,756,778 | 8,756,778 | [1] | 8,756,778 | [2]
Common stock, shares outstanding | 8,756,778 | 8,756,778 | [1] | 8,756,778 | [2]
Class B Common Stock [Member] |  |  |  |  |
Common stock, par value | $ 1 | $ 1 | [1] | $ 1 | [2]
Common stock, shares issued | 1,639,987 | 1,677,675 | [1] | 1,677,675 | [2]
Common stock, shares outstanding | 1,639,987 | 1,677,675 | [1] | 1,677,675 | [2]
[1] | Derived from the 2010 Annual Report on Form 10-K.
[2] | Unaudited

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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + 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 + Details
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