STATEMENTS OF COMPREHENSIVE INCOME STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net income	$ 91,677	$ 93,660
Other comprehensive income (loss), net of tax
Change in pension and postemployment benefit plan liability, net of tax of $(53), $(68), $(159) and $(487), respectively	224	160
Other comprehensive income, net of tax	224	160
Comprehensive income	$ 91,901	$ 93,820