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Acquisitions (Second Quarter 2016) - Additional Information (Detail) $ in Millions | 6 Months Ended
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Jun. 30, 2016 USD ($) Client
Savitz Organization [Member] |
Business Acquisition, Contingent Consideration [Line Items] |
Effective date of acquisition | Apr. 01, 2016
Acquired entity, name | Savitz Organization
Annual revenue | $ 20.0
Flex-Pay Business Services, Inc. [Member] |
Business Acquisition, Contingent Consideration [Line Items] |
Effective date of acquisition | Jun. 01, 2016
Acquired entity, name | Flex-Pay Business Services, Inc
Estimated revenue | $ 10.0
Flex-Pay Business Services, Inc. [Member] | Minimum [Member] |
Business Acquisition, Contingent Consideration [Line Items] |
Number of clients of acquired entity | Client | 3,600

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