XML 80 R66.htm IDEA: XBRL DOCUMENT
v3.8.0.1

ALLOWANCE FOR LOAN LOSSES - Loan losses on the basis of Company's impairment methodology (Details) - USD ($) | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Allowance for loan losses on the basis of Company's impairment methodology |  |
Loans individually evaluated for impairment | $ 28,912,000 | $ 29,655,000
Loans collectively evaluated for impairment | 2,288,877,000 | 2,130,391,000
Total | 2,317,789,000 | 2,160,046,000
Allowance allocated to specific reserves for loans individually evaluated for impairment | 1,000,000 | 668,000
Commercial and industrial |  |
Allowance for loan losses on the basis of Company's impairment methodology |  |
Loans individually evaluated for impairment | 7,292,000 | 12,315,000
Loans collectively evaluated for impairment | 552,071,000 | 499,239,000
Total | 559,363,000 | 511,554,000
Commercial real estate |  |
Allowance for loan losses on the basis of Company's impairment methodology |  |
Loans individually evaluated for impairment | 9,293,000 | 6,264,000
Loans collectively evaluated for impairment | 729,000,000 | 691,530,000
Total | 738,293,000 | 697,794,000
Construction and development |  |
Allowance for loan losses on the basis of Company's impairment methodology |  |
Loans individually evaluated for impairment | 251,000 | 476,000
Loans collectively evaluated for impairment | 448,960,000 | 491,150,000
Total | 449,211,000 | 491,626,000
One to four family residential |  |
Allowance for loan losses on the basis of Company's impairment methodology |  |
Loans individually evaluated for impairment | 4,924,000 | 1,712,000
Loans collectively evaluated for impairment | 253,660,000 | 235,170,000
Total | 258,584,000 | 236,882,000
Multi‑family residential |  |
Allowance for loan losses on the basis of Company's impairment methodology |  |
Loans individually evaluated for impairment |  | 7,000
Loans collectively evaluated for impairment | 220,305,000 | 133,203,000
Total | 220,305,000 | 133,210,000
Consumer |  |
Allowance for loan losses on the basis of Company's impairment methodology |  |
Loans collectively evaluated for impairment | 40,433,000 | 39,694,000
Total | 40,433,000 | 39,694,000
Agriculture |  |
Allowance for loan losses on the basis of Company's impairment methodology |  |
Loans individually evaluated for impairment |  | 36,000
Loans collectively evaluated for impairment | 11,256,000 | 11,070,000
Total | 11,256,000 | 11,106,000
Other |  |
Allowance for loan losses on the basis of Company's impairment methodology |  |
Loans individually evaluated for impairment | 7,152,000 | 8,845,000
Loans collectively evaluated for impairment | 33,192,000 | 29,335,000
Total | $ 40,344,000 | $ 38,180,000

X
- Definition A valuation allowance for financing receivables that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The balance of financing receivables that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cbtx_CommercialAndIndustrialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cbtx_ConstructionAndDevelopmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cbtx_OneToFourFamilyResidentialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cbtx_MultiFamilyResidentialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConsumerLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cbtx_AgricultureLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cbtx_OtherLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |