XML 99 R108.htm IDEA: XBRL DOCUMENT v2.4.0.8
Employee Benefit Plans - Additional Information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]      
Common stock held in employer stock fund 499,075 561,551 588,656
Total Company expenses under the health plan $ 3,020,000 $ 2,250,000 $ 3,490,000
Deferred Compensation Liability 455,000 459,000  
Deferred compensation Expense 60,000 60,000 60,000
Employees Four Zero One K Savings Plan
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan Employer Matching Contributions 1,610,000 1,270,000 1,340,000
Defined Contribution Plan Employer Contribution Percentage 100.00%    
Supplemental Executive Retirement Plan
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Contribution Plan Maximum Employee Contribution As Percentage Of Average Compensation 35.00%    
Defined Benefit Plan, Employee Contribution, Age 62    
Defined benefit plan, actuarial obligation 5,620,000 5,620,000  
Defined benefit plan, actuarial obligation increase 380,000    
Defined benefit plan, actuarial obligation gain 725,000    
Defined benefit plan, actuarial discount rate assumption 5.25% 4.20%  
Directors Plan
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Employee Contribution, Age 70    
Defined benefit plan, actuarial obligation 975,000 981,000  
Defined benefit plan, actuarial discount rate assumption 5.25% 4.20%  
Defined Contribution Plan Maximum Employee Contribution As Percentage Of Base Salary 100.00%    
Individual Counterparty
      
Defined Benefit Plan Disclosure [Line Items]      
Stop Loss Insurance Liability 100,000    
Aggregate
      
Defined Benefit Plan Disclosure [Line Items]      
Stop Loss Insurance Liability $ 3,980,000