Recent Accounting Developments (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jan. 01, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle
Accumulated deficit	$ (2,380,626)			$ (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	2,282	$ 335
Write-offs charged against the allowance	(646)
Balance at end of period	3,630
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