Accounts Receivable and Credit Losses (Financing Receivables Past Due Prior to Adopting ASC 326) (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Institutional Loans, Past Due		$ 24,276	$ 18,800
Institutional Loans, Current		25,749	31,415
Total Institutional Loans	$ 47,995	50,025	50,215
Financing Receivables 1 To 30 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Institutional Loans, Past Due		7,192	3,226
Total Institutional Loans	3,074
Financing Receivables 31 To 60Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Institutional Loans, Past Due		1,755	1,601
Total Institutional Loans	1,563
Financing Receivables 61 To 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Institutional Loans, Past Due		1,547	566
Total Institutional Loans	1,187
Financing Receivables Greater Than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Institutional Loans, Past Due		$ 13,782	$ 13,407
Total Institutional Loans	$ 13,735