Income Taxes Income Taxes - Allocation of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Continuing operations	$ 313,932	$ 279,628	$ 258,400
Discontinued operations	1,657	40,689	99,768
Income tax (benefit) expense from continuing and discontinued operations	$ 315,589	$ 320,317	$ 358,168