XML 26 R76.htm IDEA: XBRL DOCUMENT v2.4.0.6
Employee Benefit Plans (Details) (USD $)
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Pension Plans Defined Benefit Member
    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan Service Cost $ 1,883,000 $ 1,532,000
Defined Benefit Plan Interest Cost 1,018,000 980,000
Expected return on plan assets (767,000) (734,000)
Defined Benefit Plan Amortization Of Prior Service Cost Credit 94,000 99,000
Amortization of prior actuarial loss 837,000 275,000
Total 3,065,000 2,152,000
Other Postretirement Benefit Plans Defined Benefit Member
    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan Service Cost 410,000 279,000
Defined Benefit Plan Interest Cost 312,000 259,000
Expected return on plan assets 0 0
Defined Benefit Plan Amortization Of Prior Service Cost Credit 0 0
Amortization of prior actuarial loss 186,000 88,000
Total $ 908,000 $ 626,000