Acquisitions - Schedule of Intangible Assets Acquired (Details) - USD ($) $ in Thousands			3 Months Ended
	Feb. 14, 2020	Jun. 14, 2019	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019
Stratus Video
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value	$ 228,000			$ 228,000
Stratus Video | Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value	$ 171,000
Useful life	20 years
Stratus Video | Tradenames and Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value	$ 40,000
Useful life			5 years
Stratus Video | Developed Technology
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value	$ 16,000
Useful life	5 years
Stratus Video | Interpreter Database
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value	$ 1,000
Useful life	4 years
Advanced
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value		$ 91,700			$ 91,700
Advanced | Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value		$ 68,000
Useful life		10 years
Advanced | Tradenames and Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value		$ 10,000
Useful life		5 years
Advanced | Developed Technology
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value		$ 3,400
Useful life		3 years
Advanced | Staffing Database
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value		$ 10,300
Useful life		10 years
Minimum | Stratus Video | Tradenames and Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Useful life	5 years
Maximum | Stratus Video | Tradenames and Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Useful life	10 years