Commitments (Tables)

12 Months Ended

Dec. 31, 2019

Commitments And Contingencies Disclosure [Abstract]

Summary of Expense Incurred under Atos Agreement

	Year Ended December 31,
(In thousands)	2019		2018		2017
Expenses incurred under Atos agreements	$	100,089	$	55,903	$	58,787