Label	Element	Value
Restricted Cash	us-gaap_RestrictedCash	$ 23,951,000
Restricted Cash	us-gaap_RestrictedCash	29,595,000
Restricted Cash	us-gaap_RestrictedCash	27,481,000
Cash Equivalents Included In Funds Held For Clients	cbz_CashEquivalentsIncludedInFundsHeldForClients	116,343,000
Cash Equivalents Included In Funds Held For Clients	cbz_CashEquivalentsIncludedInFundsHeldForClients	102,433,000
Cash Equivalents Included In Funds Held For Clients	cbz_CashEquivalentsIncludedInFundsHeldForClients	$ 141,732,000

Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=121583591&loc=SL98516268-108586

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(1)(a))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(2))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Name:	us-gaap_RestrictedCash
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant