Accounts Receivable and Credit Losses (Financing Receivables Past Due Prior to Adopting ASC 326) (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Institutional Loans, Past Due		$ 24,276	$ 16,146
Institutional Loans, Current		25,749	31,527
Total Institutional Loans	$ 49,831	50,025	47,673
Financing Receivables 1 To 30 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Institutional Loans, Past Due		7,192	3,317
Total Institutional Loans	4,394
Financing Receivables 31 To 60Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Institutional Loans, Past Due		1,755	1,342
Total Institutional Loans	1,032
Financing Receivables 61 To 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Institutional Loans, Past Due		1,547	526
Total Institutional Loans	1,310
Financing Receivables Greater Than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Institutional Loans, Past Due		$ 13,782	$ 10,961
Total Institutional Loans	$ 15,276