XML 66 R55.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Subsequent Events - Additional Information (Detail) - USD ($) |  | 9 Months Ended |
--- | --- | --- | ---
Nov. 01, 2016 | Sep. 30, 2016 | Sep. 30, 2015 | Oct. 27, 2016
Subsequent Event [Line Items] |  |  |  |
Repayment of senior term loans |  | $ 23,125,000 | $ 651,863,000 |
2015 Credit Agreement [Member] | Subsequent Event [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Repayment of senior term loans | $ 101,900,000 |  |  |
Tranche A term loan facility [Member] | 2015 Credit Agreement [Member] | Subsequent Event [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Repayment of senior term loans | 59,400,000 |  |  |
Tranche B-1 term loan facility [Member] | 2015 Credit Agreement [Member] | Subsequent Event [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Repayment of senior term loans | 28,700,000 |  |  |
Tranche B-2 term loan facility [Member] | 2015 Credit Agreement [Member] | Subsequent Event [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Repayment of senior term loans | $ 13,800,000 |  |  |
Class A Common Stock [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Authorized share repurchase term |  | 3 years |  |
Class A Common Stock [Member] | Maximum [Member] | Subsequent Event [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Authorized share repurchase amount |  |  |  | $ 250,000,000

X
- Definition Authorized share repurchase period. + References No definition available. + Details
Name: | cbg_AuthorizedShareRepurchasePeriod
Namespace Prefix: | cbg_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Repayments of senior term loans. + References No definition available. + Details
Name: | cbg_RepaymentsOfSeniorTermLoans
Namespace Prefix: | cbg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cbg_TwoThousandFifteenCreditAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=cbg_TrancheATermLoanFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=cbg_TranchebOneTermLoanFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=cbg_TranchebTwoTermLoanFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |