Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2019

Revenue Recognition from Contracts with Customers [Abstract]

Contract with Customer, Asset and Liability [Table Text Block]

The Company’s contract balances were as follows:

	As of
(In thousands)	March 31, 2019		December 31, 2018
Unbilled receivables	$	629,435	$	673,616
Deferred revenue	15,995		19,566