XML 28 R91.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Employee Benefit Plans - Net Periodic Benefit Cost (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Components of net periodic benefit cost      
Recognized net actuarial gain due to curtailments $ 302 $ 0 $ 0
DB Pension Plans      
Components of net periodic benefit cost      
Service cost 0 0 0
Interest cost 2,936 2,508 2,501
Expected return on plan assets (4,933) (5,648) (5,088)
Amortization of prior service (credit) cost (10) (10) (10)
Recognized net actuarial loss 1,334 1,118 1,075
Recognized net actuarial gain due to curtailments 0 0 0
Net periodic benefit (credit) cost (673) (2,032) (1,522)
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss)      
Net actuarial loss (gain) 2,776 7,761 1,434
Recognized actuarial loss (1,334) (1,118) (1,075)
Prior service credit 0 0 0
Recognized prior service cost (credit) 10 10 10
Prior service cost (credit) recognized due to curtailment 0 0 0
Recognized in other comprehensive income (loss) 1,452 6,653 369
Total recognized in net periodic benefit cost and other comprehensive income (loss) 779 4,621 (1,153)
Life and Healthcare Plan      
Components of net periodic benefit cost      
Service cost 159 212 192
Interest cost 289 270 268
Expected return on plan assets 0 0 0
Amortization of prior service (credit) cost (62) (62) (62)
Recognized net actuarial loss 0 62 34
Recognized net actuarial gain due to curtailments (399) 0 0
Net periodic benefit (credit) cost (13) 482 432
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss)      
Net actuarial loss (gain) 1,218 (1,337) 708
Recognized actuarial loss 0 (62) (34)
Prior service credit (203) 0 (964)
Recognized prior service cost (credit) 62 62 62
Prior service cost (credit) recognized due to curtailment 399 0 0
Recognized in other comprehensive income (loss) 1,476 (1,337) (228)
Total recognized in net periodic benefit cost and other comprehensive income (loss) 1,463 (855) 204
SERP Plan      
Components of net periodic benefit cost      
Service cost 157 160 166
Interest cost 909 833 852
Expected return on plan assets 0 0 0
Amortization of prior service (credit) cost 104 87 87
Recognized net actuarial loss 343 539 399
Recognized net actuarial gain due to curtailments 0 0 0
Net periodic benefit (credit) cost 1,513 1,619 1,504
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss)      
Net actuarial loss (gain) 6,128 (2,987) 2,407
Recognized actuarial loss (343) (539) (399)
Prior service credit 2,022 0 0
Recognized prior service cost (credit) (104) (87) (87)
Prior service cost (credit) recognized due to curtailment 0 0 0
Recognized in other comprehensive income (loss) 7,703 (3,613) 1,921
Total recognized in net periodic benefit cost and other comprehensive income (loss) $ 9,216 $ (1,994) $ 3,425