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Stockholders' Equity (Rollforward Of Common Stock Table) (Details) - shares | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Class of Stock [Line Items] |  |  |
Treasury Stock, Shares, Beginning Balance | 894,773 |  |
Balance (Outstanding Shares), Beginning | 10,221,006 |  |
Purchased through share repurchase program (Treasury) | 5,000 | 80,512 |
Treasury Stock, Shares, Ending Balance | 803,154 | 894,773 |
Balance (Outstanding Shares), Ending | 10,312,625 | 10,221,006 |
Common Stock [Member] |  |  |
Class of Stock [Line Items] |  |  |
Treasury Stock, Shares, Beginning Balance | 894,773 | 873,374 | 927,258
Balance (Outstanding Shares), Beginning | 10,221,006 | 10,242,405 | 10,188,521
Issued for stock-based compensation plans (Treasury) | (96,619) | (59,113) | (53,884)
Issued for stock-based compensation plans (Outstanding) | 96,619 | 59,113 | 53,884
Purchased through share repurchase program (Treasury) | 5,000 | 80,512 |
Purchased through share repurchase program (Outstanding) | (5,000) | (80,512) |
Treasury Stock, Shares, Ending Balance | 803,154 | 894,773 | 873,374
Balance (Outstanding Shares), Ending | 10,312,625 | 10,221,006 | 10,242,405

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- Definition Number of outstanding common shares that have been repurchased during the period and are being held in treasury. + References No definition available. + Details
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- Definition Number of common shares reissued from treasury during the period. Upon reissuance of shares from treasury, the common or preferred stock reissued is outstanding. + References No definition available. + Details
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- Definition Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. + 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 FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
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- Definition Number of treasury shares (units) reissued during the period, excluding reissuance of shares (units) held in treasury used to satisfy equity-based compensation obligations exercised by the holders of such rights. Upon reissuance of shares (units) from treasury, either the common or preferred stock (unit) reissued is outstanding. + 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 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=27012166&loc=d3e187085-122770 Reference 3: 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 + Details
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- Definition Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends. + 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 210.5-02.29,30) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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