Income Taxes - Unrecognized tax benefits and other (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Jun. 30, 2020	Mar. 31, 2020
Income Taxes
Total liability for unrecognized tax benefits	$ 6,443	$ 6,627
Increase (decrease) in unrecognized tax benefits	(184)	$ 80
Cash, cash equivalents, short-term investments and long-term investments available for distribution if not indefinitely reinvested	$ 191,252

Amount of unrecognized tax benefits.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 10B
-URI http://asc.fasb.org/extlink&oid=116821951&loc=SL37586934-109318

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319

Name:	us-gaap_UnrecognizedTaxBenefits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant