Recent Accounting Developments (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Jan. 01, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle
Accumulated deficit	$ (2,384,602)			$ (2,244,877)
Credit Losses
Contractual life of accounts receivable	30 days
Period for analyzing historical loss data to determine loss experience	2 years
Changes in the allowance for credit losses balance
Balance at beginning of period	$ 2,210
Provision for credit losses	2,235	$ 979
Write-offs charged against the allowance	(1,006)
Balance at end of period	3,223
ASU 2016-13
New Accounting Pronouncements or Change in Accounting Principle
Change in Accounting Principle, Accounting Standards Update, Adopted			true
ASU 2016-13 | Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle
Accumulated deficit				$ (200)
Changes in the allowance for credit losses balance
Balance at beginning of period	$ (216)
ASU 2018-13
New Accounting Pronouncements or Change in Accounting Principle
Change in Accounting Principle, Accounting Standards Update, Adopted			true
ASU 2019-12
New Accounting Pronouncements or Change in Accounting Principle
Change in Accounting Principle, Accounting Standards Update, Adopted			true