STATEMENTS OF COMPREHENSIVE INCOME STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Net income	$ 98,934	$ 95,575
Other comprehensive income (loss), net of tax
Change in pension and other postemployment benefit plan liability, net of tax of $(19) and $(91), respectively	69	300
Other comprehensive income, net of tax	69	300
Comprehensive income	$ 99,003	$ 95,875