New Accounting Standards - Narrative (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 01, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings (accumulated deficit)		$ (638,457)	$ 107,048
Income Tax Expense (Benefit)		$ (20,396)	$ 6,226	$ 28,162
Cumulative Effect Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings (accumulated deficit)	$ 1,600
Income Tax Expense (Benefit)	$ 400