|**Stock Based Compensation (Tables)**                                         | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
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|**Disclosure of Compensation Related Costs, Share-based Payments [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|Stock-Based Compensation Recognized as Expense                                | Total stock-based compensation recorded in corporate expense, net on the consolidated statements of operations for the three years endedDecember 31, 2016is as follows:201620152014Stock compensation expense before tax benefit$131$150$210Income tax benefit(50)(58)(81)$81$92$129                                                                                                                                                                                                     
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|                                                                              | 2016                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|Stock compensation expense before tax benefit                                 | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|Income tax benefit                                                            | (50                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|                                                                              | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
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|Summary of Option Activity Outstanding                                        | The following table sets forth the summary of option activity outstanding under the stock option program for2016:Number of   SharesWeighted  AverageExercise PriceWeighted  AverageRemainingContractual Life(Years)AggregateIntrinsic Value($000)Balance at December 31, 201599,775$54.150.9—Forfeited or expired54,37054.24——Balance at December 31, 201645,405$54.050.1—Vested or expected to vest at December 31, 201645,405$54.050.1—Exercisable at December 31, 201645,405$54.050.1—
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|                                                                              | Number of   Shares                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|Balance at December 31, 2015                                                  | 99,775                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Forfeited or expired                                                          | 54,370                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Balance at December 31, 2016                                                  | 45,405                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Vested or expected to vest at December 31, 2016                               | 45,405                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Exercisable at December 31, 2016                                              | 45,405                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   

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