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Customer Trust Fund - Gross Unrealized Losses and Related Fair Value of Investment (Parenthetical) (Detail) $ in Thousands | Mar. 31, 2019 USD ($)
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Debt Securities, Available-for-sale [Line Items] |
Unrealized losses, less than 12 months | $ 100
Mortgage-backed Securities [Member] | Maximum [Member] |
Debt Securities, Available-for-sale [Line Items] |
Unrealized losses, less than 12 months | $ 50

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- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Balance Type: |
Period Type: |