XML 57 R41.htm IDEA: XBRL DOCUMENT v2.4.0.6
Components of Net Periodic Benefit Cost (Details) (USD $)
 1 Months Ended 3 Months Ended 9 Months Ended
Apr. 30, 2011
acre
Sep. 30, 2012
item
Sep. 30, 2011
Sep. 30, 2012
item
Sep. 30, 2011
Components of Net Periodic Benefit Cost          
Service cost         $ 18,000
Interest cost   798,000 835,000 2,394,000 2,505,000
Expected return on plan assets   (717,000) (757,000) (2,151,000) (2,270,000)
Amortization of prior service cost         8,000
Amortization of transition liability         11,000
Recognized actuarial loss   185,000 203,000 555,000 607,000
Net expense   266,000 281,000 798,000 879,000
Expected minimum required contributions   2,000,000   2,000,000  
Contributions funded by employer       1,700,000  
Security to support the unfunded liabilities of the Bargaining Plan   5,200,000   5,200,000  
Area of property pledged as security (in acres) 1,400        
Period for release of property pledged as collateral 5 years        
Additional security to support unfunded liabilities   $ 18,700,000   $ 18,700,000  
Number of unfunded pension plans   2   2