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Current Expected Credit Losses (CECL) - Schedule of Portfolio Segment by Class of Financing Receivables, Credit Quality Indicator and Origination Year (Detail) - Class of Financing Receivables, Credit Quality Indicator and Origination [Member] $ in Thousands | Mar. 31, 2020 USD ($)
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Accrued Commissions Receivable [Member] |
Financing Receivable Recorded Investment Past Due [Line Items] |
Financing receivable, amortized cost basis, total | $ 421,894
Financing receivable, amortized cost basis by origination year, 2020 | 272,074
Financing receivable, amortized cost basis by origination year, 2019 | 113,379
Financing receivable, amortized cost basis by origination year, 2018 | 25,399
Financing receivable, amortized cost basis by origination year, 2017 | 6,878
Financing receivable, amortized cost basis by origination year, Prior | 4,164
Employee-Related Receivables [Member] |
Financing Receivable Recorded Investment Past Due [Line Items] |
Financing receivable, amortized cost basis, total | 6,222
Financing receivable, amortized cost basis by origination year, 2020 | 605
Financing receivable, amortized cost basis by origination year, 2019 | 3,323
Financing receivable, amortized cost basis by origination year, 2018 | 1,052
Financing receivable, amortized cost basis by origination year, 2017 | 375
Financing receivable, amortized cost basis by origination year, Prior | 867
Less Than 1 Year [Member] | Accrued Commissions Receivable [Member] |
Financing Receivable Recorded Investment Past Due [Line Items] |
Financing receivable, amortized cost basis, total | 371,270
Financing receivable, amortized cost basis by origination year, 2020 | 272,074
Financing receivable, amortized cost basis by origination year, 2019 | 99,196
Less Than 1 Year [Member] | Employee-Related Receivables [Member] |
Financing Receivable Recorded Investment Past Due [Line Items] |
Financing receivable, amortized cost basis, total | 3,009
Financing receivable, amortized cost basis by origination year, 2020 | 605
Financing receivable, amortized cost basis by origination year, 2019 | 2,404
1 Year - Less Than 2 Years [Member] | Accrued Commissions Receivable [Member] |
Financing Receivable Recorded Investment Past Due [Line Items] |
Financing receivable, amortized cost basis, total | 34,468
Financing receivable, amortized cost basis by origination year, 2019 | 14,183
Financing receivable, amortized cost basis by origination year, 2018 | 20,285
1 Year - Less Than 2 Years [Member] | Employee-Related Receivables [Member] |
Financing Receivable Recorded Investment Past Due [Line Items] |
Financing receivable, amortized cost basis, total | 1,888
Financing receivable, amortized cost basis by origination year, 2019 | 919
Financing receivable, amortized cost basis by origination year, 2018 | 969
2 Years and Greater [Member] | Accrued Commissions Receivable [Member] |
Financing Receivable Recorded Investment Past Due [Line Items] |
Financing receivable, amortized cost basis, total | 16,156
Financing receivable, amortized cost basis by origination year, 2018 | 5,114
Financing receivable, amortized cost basis by origination year, 2017 | 6,878
Financing receivable, amortized cost basis by origination year, Prior | 4,164
2 Years and Greater [Member] | Employee-Related Receivables [Member] |
Financing Receivable Recorded Investment Past Due [Line Items] |
Financing receivable, amortized cost basis, total | 1,325
Financing receivable, amortized cost basis by origination year, 2018 | 83
Financing receivable, amortized cost basis by origination year, 2017 | 375
Financing receivable, amortized cost basis by origination year, Prior | $ 867

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