Summary of Significant Accounting Policies - Revenue Recognition (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract cost capitalized during the period	$ 207,000	$ 183,000
Amortization expense related to the programs	76,000	28,000
Total costs capitalized	300,000	169,000
Retained earnings	(12,366,909)	$ (13,194,440)
ASU 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings	2,000
Deferred taxes	$ 1,000