XML 81 R64.htm IDEA: XBRL DOCUMENT v3.10.0.1
Benefit Plans Plan Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 133,459 $ 140,164  
Equity Securities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Actual plan asset allocations as a percent of toal plan assets 60.00%    
Cash and Cash Equivalents [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 8,136 8,207  
Actual plan asset allocations as a percent of toal plan assets 6.00%    
Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 127,610 133,360 $ 113,895
Pension Plan [Member] | Debt Securities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 42,654 $ 42,784  
Actual plan asset allocations as a percent of toal plan assets 33.00% 32.00%  
Pension Plan [Member] | Equity Securities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 77,053 $ 83,352  
Actual plan asset allocations as a percent of toal plan assets 60.00% 63.00%  
Pension Plan [Member] | Cash and Cash Equivalents [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 7,903 $ 7,224  
Actual plan asset allocations as a percent of toal plan assets 6.00% 5.00%  
Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 5,849 $ 6,804 $ 5,366
Other Postretirement Benefits Plan [Member] | Debt Securities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 2,200 $ 1,710  
Actual plan asset allocations as a percent of toal plan assets 38.00% 25.00%  
Other Postretirement Benefits Plan [Member] | Equity Securities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 3,416 $ 4,111  
Actual plan asset allocations as a percent of toal plan assets 58.00% 60.00%  
Other Postretirement Benefits Plan [Member] | Cash and Cash Equivalents [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 233 $ 983  
Actual plan asset allocations as a percent of toal plan assets 4.00% 14.00%