XML 87 R76.htm IDEA: XBRL DOCUMENT v3.21.2
EMPLOYEE BENEFIT PLANS - Employee benefit plan amounts recognized in the Consolidated Balance Sheets and Consolidated Statements of Income (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Retirement Benefits [Abstract]        
Service cost $ 2,311 $ 1,926 $ 4,661 $ 3,776
Interest cost 533 607 1,058 1,207
Expected return on plan assets (2,538) (2,464) (5,088) (4,939)
Amortization of prior service cost (102) (102) (202) (202)
Defined Benefit Plan, Amortization of Gain (Loss) 641 559 1,266 1,084
Net periodic benefit cost (income) $ 845 $ 526 $ 1,695 $ 926