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Stock-Based Compensation Plans (Narrative) (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2015 USD ($) plan shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of equity compensation plans | plan | 3
Number of equity compensation plans available for future grants | plan | 2
Unrecognized compensation cost related to share-based payments | $ | $ 1.8
Unrecognized compensation cost related to share-based payments, period for recognition | 2 years 7 months 1 day
Principal Owner | Minimum |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Stock options, exercise price as percent of weighted-average grant date fair value | 110.00%
NonPrincipal Owner |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Stock options, exercise price as percent of weighted-average grant date fair value | 100.00%
Long-Term Incentive Compensation Plan 2007 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares reserved for issuance under equity compensation plans | shares | 2,400,000
Directors’ Incentive Plan 2007 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares reserved for issuance under equity compensation plans | shares | 250,000
Stock Options | Principal Owner |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Stock options, expiration period | 5 years
Stock Options | NonPrincipal Owner | Maximum |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Stock options, expiration period | 10 years
Restricted Stock | Employee |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Award vesting period | 4 years
Restricted Stock | Director |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Award vesting period | 1 year

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- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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