v2.4.0.8
Pension, Postretirement and Postemployment Benefits (Details) (Pension Benefits, USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Pension Benefits
      
Change in benefit obligation:      
Benefit obligation at beginning of year $ 29,205,000 $ 26,659,000  
Interest cost 1,078,000 1,116,000 1,198,000
Actuarial loss (gain) (3,360,000) 2,107,000  
Benefit payments (730,000) (677,000)  
Benefit obligation at end of year 26,193,000 29,205,000 26,659,000
Change in plan assets:      
Fair value of plan assets at beginning of year 18,780,000 16,352,000  
Actual (loss) return on plan assets 2,736,000 1,598,000  
Employer contributions 598,000 1,507,000  
Benefit payments (730,000) (677,000)  
Fair value of plan assets at end of year 21,384,000 18,780,000 16,352,000
Funded status:      
Underfunded status at end of year (4,809,000) (10,425,000)  
Amounts recognized in consolidated balance sheets:      
Other long-term liabilities (4,809,000) (10,425,000)  
Components of net periodic benefit cost (recognized in our consolidated statements of income):      
Interest cost 1,078,000 1,116,000 1,198,000
Expected return on plan assets (1,210,000) (1,086,000) (1,008,000)
Recognized net actuarial loss 1,123,000 1,034,000 628,000
Net periodic benefit cost 991,000 1,064,000 818,000
Weighted-average assumptions:      
Weighted-average discount rate (as a percent) 4.75% 3.75% 4.25%
Expected long-term rate of return on plan assets (as a percent) 6.50% 6.50% 6.50%
Net actuarial loss included in accumulated other comprehensive income (loss) (6,600,000) (12,700,000) (12,100,000)
Amount expected to recognize as a components of net periodic benefit costs $ 500,000