XML 95 R82.htm IDEA: XBRL DOCUMENT v3.10.0.1
Retirement Plans, Expected Employer Contribution and Benefit Payments (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Pension Plan [Member]    
Expected employer contributions [Abstract]    
First year $ 2,395 $ 0
Expected benefit payments (gross) [Abstract]    
Year one 12,209 9,483
Year two 13,108 10,131
Year three 13,959 10,818
Year four 14,959 11,608
Year five 16,052 12,377
Next five years 96,547 75,717
SERP [Member]    
Expected employer contributions [Abstract]    
First year 162 162
Expected benefit payments (gross) [Abstract]    
Year one 162 162
Year two 159 159
Year three 155 156
Year four 130 152
Year five 104 149
Next five years 447 462
Other Postretirement Benefits [Member]    
Expected employer contributions [Abstract]    
First year 66 48
Expected benefit payments (gross) [Abstract]    
Year one 66 55
Year two 68 56
Year three 69 58
Year four 57 58
Year five 56 46
Next five years $ 261 $ 214