Acquisitions and Investments - Ascatron AB Preliminary Allocation of Purchase Price of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020
Assets
Goodwill	$ 1,292,384		$ 1,239,009
Ascatron AB
Assets
Developed technology	16,378	$ 20,000
Goodwill	21,738	18,922
Other assets	2,543	2,511
Total assets acquired	40,659	41,433
Liabilities
Non-interest bearing liabilities	(450)	(203)
Deferred tax liability	(3,505)	(4,526)
Total liabilities assumed	(3,955)	(4,729)
Net assets acquired	36,704	$ 36,704
Assets
Intangibles assets	(3,622)
Goodwill	2,815
Other assets	33
Total assets acquired	(774)
Liabilities
Non-interest bearing liabilities	(247)
Deferred tax liability	1,021
Total liabilities assumed	774
Net assets acquired	$ 0