XML 41 R29.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Loans and Allowance for Loan Losses (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Receivables [Abstract] |
Past Due Financing Receivables | The following table shows outstanding loans by class and payment aging as of December 31, 2017 and 2016.
Loan Aging Analysis by Class
(in thousands) | Commercial and industrial |  | Commercial real estate, owner-occupied |  | Commercial real estate, investor |  | Construction |  | Home equity |  | Other residential 1 |  | Installment and other consumer |  | Total |
December 31, 2017 |  |  |  |  |  |  |  |
30-59 days past due | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | 99 |  | $ | 255 |  | $ | 330 |  | $ | 684 |
60-89 days past due | 1,340 |  | — |  | — |  | — |  | — |  | — |  | — |  | 1,340 |
90 days or more past due | — |  | — |  | — |  | — |  | 307 |  | — |  | — |  | 307 |
Total past due | 1,340 |  | — |  | — |  | — |  | 406 |  | 255 |  | 330 |  | 2,331 |
Current | 234,495 |  | 300,963 |  | 822,984 |  | 63,828 |  | 132,061 |  | 95,271 |  | 27,080 |  | 1,676,682 |
Total loans 3 | $ | 235,835 |  | $ | 300,963 |  | $ | 822,984 |  | $ | 63,828 |  | $ | 132,467 |  | $ | 95,526 |  | $ | 27,410 |  | $ | 1,679,013 |
Non-accrual loans 2 | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | 406 |  | $ | — |  | $ | — |  | $ | 406 |
December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
30-59 days past due | $ | 283 |  | $ | — |  | $ | — |  | $ | — |  | $ | 77 |  | $ | — |  | $ | 2 |  | $ | 362 |
60-89 days past due | — |  | — |  | — |  | — |  | — |  | — |  | 49 |  | 49 |
90 days or more past due | — |  | — |  | — |  | — |  | 91 |  | — |  | — |  | 91 |
Total past due | 283 |  | — |  | — |  | — |  | 168 |  | — |  | 51 |  | 502 |
Current | 218,332 |  | 247,713 |  | 724,228 |  | 74,809 |  | 117,039 |  | 78,549 |  | 25,444 |  | 1,486,114 |
Total loans 3 | $ | 218,615 |  | $ | 247,713 |  | $ | 724,228 |  | $ | 74,809 |  | $ | 117,207 |  | $ | 78,549 |  | $ | 25,495 |  | $ | 1,486,616 |
Non-accrual loans 2 | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | 91 |  | $ | — |  | $ | 54 |  | $ | 145 |
1 Our residential loan portfolio does not include sub-prime loans, nor is it our practice to underwrite loans commonly referred to as "Alt-A mortgages," the characteristics of which are loans lacking full documentation, borrowers having low FICO scores or higher loan-to-value ratios. 2 There were three purchased credit impaired ("PCI") loans with unpaid balances totaling $131 thousand and no carrying values that had stopped accreting interest at December 31, 2017. There were no PCI loans that had stopped accreting interest at December 31, 2016. Amounts exclude accreting PCI loans of $2.1 million and $2.9 million at December 31, 2017 and 2016, respectively, as we have a reasonable expectation about future cash flows to be collected and we continue to recognize accretable yield on these loans in interest income. There were no accruing loans past due more than ninety days at December 31, 2017 or 2016. 3 Amounts include net deferred loan origination costs of $818 thousand and $883 thousand at December 31, 2017 and 2016, respectively. Amounts are also net of unaccreted purchase discounts on non-PCI loans of $1.2 million and $1.8 million at December 31, 2017 and 2016, respectively.
Financing Receivable Credit Quality Indicators | The following table represents an analysis of the carrying amount in loans, net of deferred fees and costs and purchase premiums or discounts, by internally assigned risk grades, including PCI loans, at December 31, 2017 and 2016.
Credit Risk Profile by Internally Assigned Risk Grade
(in thousands) | Commercial and industrial |  | Commercial real estate, owner-occupied |  | Commercial real estate, investor |  | Construction |  | Home equity |  | Other residential |  | Installment and other consumer |  | Purchased credit-impaired |  | Total |
December 31, 2017 |  |  |  |  |  |  |  |
Pass | $ | 214,636 |  | $ | 281,104 |  | $ | 818,570 |  | $ | 60,859 |  | $ | 130,558 |  | $ | 95,526 |  | $ | 27,287 |  | $ | 1,325 |  | $ | 1,629,865 |
Special Mention | 9,318 |  | 9,284 |  | 1,850 |  | — |  | — |  | — |  | — |  | 790 |  | 21,242 |
Substandard | 11,816 |  | 9,409 |  | 1,774 |  | 2,969 |  | 1,815 |  | — |  | 123 |  | — |  | 27,906 |
Total loans | $ | 235,770 |  | $ | 299,797 |  | $ | 822,194 |  | $ | 63,828 |  | $ | 132,373 |  | $ | 95,526 |  | $ | 27,410 |  | $ | 2,115 |  | $ | 1,679,013 |
December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pass | $ | 201,987 |  | $ | 234,849 |  | $ | 720,417 |  | $ | 71,564 |  | $ | 115,680 |  | $ | 78,549 |  | $ | 25,083 |  | $ | 2,920 |  | $ | 1,451,049 |
Special Mention | 9,197 |  | 4,799 |  | 607 |  | — |  | 1,334 |  | — |  | — |  | — |  | 15,937 |
Substandard | 7,391 |  | 6,993 |  | 1,498 |  | 3,245 |  | 91 |  | — |  | 412 |  | — |  | 19,630 |
Total loans | $ | 218,575 |  | $ | 246,641 |  | $ | 722,522 |  | $ | 74,809 |  | $ | 117,105 |  | $ | 78,549 |  | $ | 25,495 |  | $ | 2,920 |  | $ | 1,486,616 |
Troubled Debt Restructurings on Financing Receivables | The following table summarizes the carrying amount of TDR loans by loan class as of December 31, 2017 and December 31, 2016.
(in thousands) | As of
Recorded investment in Troubled Debt Restructurings 1 | December 31, 2017 |  | December 31, 2016 |
Commercial and industrial | $ | 2,165 |  | $ | 2,207 |
Commercial real estate, owner-occupied | 6,999 |  | 6,993 |
Commercial real estate, investor | 2,171 |  | 2,256 |
Construction | 2,969 |  | 3,245 |
Home equity | 347 |  | 625 |
Other residential | 1,148 |  | 1,965 |
Installment and other consumer | 721 |  | 877 |
Total | $ | 16,520 |  | $ | 18,168 |
1 There were no TDR loans on non-accrual status at December 31, 2017 or December 31, 2016. Includes no acquired TDR loans as of December 31, 2017 or December 31, 2016. The following table presents information for loans modified in a TDR during the presented periods, including the number of contracts modified, the recorded investment in the loans prior to modification, and the recorded investment in the loans at period end after being restructured. The table excludes fully charged-off TDR loans and loans modified in a TDR and subsequently paid-off during the years presented.
(dollars in thousands) | Number of Contracts Modified |  | Pre-Modification Outstanding Recorded Investment |  | Post-Modification Outstanding Recorded Investment |  | Post-Modification Outstanding Recorded Investment at Period End |
TDRs modified during 2017: |  |  |  |  |  |  |
Installment and other consumer | 1 |  | $ | 50 |  | $ | 50 |  | $ | 47 |
TDRs modified during 2016: |  |  |  |  |  |  |
Commercial real estate, investor | 2 |  | $ | 1,830 |  | $ | 1,826 |  | $ | 1,752 |
Home equity 1 | 1 |  | 87 |  | 222 |  | 245 |
Installment and other consumer | 1 |  | 68 |  | 67 |  | 66 |
Total | 4 |  | $ | 1,985 |  | $ | 2,115 |  | $ | 2,063 |
1 The home equity line of credit modified in 2016 included debt consolidation, which increased the post-modification balance.
TDRs modified during 2015: |  |  |  |
Commercial and industrial | 7 |  | $ | 3,271 |  | $ | 3,251 |  | $ | 2,811 |
Impaired Financing Receivables | The following tables summarize information by class on impaired loans and their related allowances. Total impaired loans include non-accrual loans, accruing TDR loans and accreting PCI loans that have experienced post-acquisition declines in cash flows expected to be collected.
(in thousands) | Commercial and industrial |  | Commercial real estate, owner-occupied |  | Commercial real estate, investor |  | Construction |  | Home equity |  | Other residential |  | Installment and other consumer |  | Total |
December 31, 2017 |  |  |  |  |  |  |
Recorded investment in impaired loans: |  |  |  |  |  |
With no specific allowance recorded | $ | 309 |  | $ | — |  | $ | — |  | $ | 2,689 |  | $ | 406 |  | $ | 995 |  | $ | 46 |  | $ | 4,445 |
With a specific allowance recorded | 1,856 |  | 6,999 |  | 2,171 |  | 280 |  | 347 |  | 153 |  | 675 |  | 12,481 |
Total recorded investment in impaired loans | $ | 2,165 |  | $ | 6,999 |  | $ | 2,171 |  | $ | 2,969 |  | $ | 753 |  | $ | 1,148 |  | $ | 721 |  | $ | 16,926 |
Unpaid principal balance of impaired loans | $ | 2,278 |  | $ | 6,993 |  | $ | 2,168 |  | $ | 2,963 |  | $ | 750 |  | $ | 1,147 |  | $ | 720 |  | $ | 17,019 |
Specific allowance | $ | 50 |  | $ | 188 |  | $ | 159 |  | $ | 7 |  | $ | 6 |  | $ | 1 |  | $ | 102 |  | $ | 513 |
Average recorded investment in impaired loans during 2017 | $ | 2,113 |  | $ | 6,998 |  | $ | 2,842 |  | $ | 3,132 |  | $ | 679 |  | $ | 1,324 |  | $ | 841 |  | $ | 17,929 |
Interest income recognized on impaired loans during 2017 1 | $ | 202 |  | $ | 266 |  | $ | 87 |  | $ | 147 |  | $ | 24 |  | $ | 62 |  | $ | 37 |  | $ | 825 |
December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Recorded investment in impaired loans: |  |  |  |  |  |  |  |  |  |  |  |
With no specific allowance recorded | $ | 315 |  | $ | — |  | $ | — |  | $ | 2,692 |  | $ | 91 |  | $ | 1,008 |  | $ | 103 |  | $ | 4,209 |
With a specific allowance recorded | 1,892 |  | 6,993 |  | 2,256 |  | 553 |  | 624 |  | 957 |  | 829 |  | 14,104 |
Total recorded investment in impaired loans | $ | 2,207 |  | $ | 6,993 |  | $ | 2,256 |  | $ | 3,245 |  | $ | 715 |  | $ | 1,965 |  | $ | 932 |  | $ | 18,313 |
Unpaid principal balance of impaired loans | $ | 2,177 |  | $ | 6,993 |  | $ | 2,252 |  | $ | 3,238 |  | $ | 713 |  | $ | 1,965 |  | $ | 932 |  | $ | 18,270 |
Specific allowance | $ | 285 |  | $ | 163 |  | $ | 375 |  | $ | 8 |  | $ | 7 |  | $ | 55 |  | $ | 98 |  | $ | 991 |
Average recorded investment in impaired loans during 2016 | $ | 3,514 |  | $ | 7,069 |  | $ | 2,950 |  | $ | 3,242 |  | $ | 945 |  | $ | 1,988 |  | $ | 1,127 |  | $ | 20,835 |
Interest income recognized on impaired loans during 2016 1 | $ | 175 |  | $ | 199 |  | $ | 1,514 |  | $ | 137 |  | $ | 60 |  | $ | 90 |  | $ | 48 |  | $ | 2,223 |
Average recorded investment in impaired loans during 2015 | $ | 4,237 |  | $ | 7,886 |  | $ | 2,833 |  | $ | 4,164 |  | $ | 602 |  | $ | 2,028 |  | $ | 1,523 |  | $ | 23,273 |
Interest income recognized on impaired loans during 2015 1 | $ | 238 |  | $ | 295 |  | $ | 33 |  | $ | 86 |  | $ | 18 |  | $ | 92 |  | $ | 64 |  | $ | 826 |
1 Interest income recognized on a cash basis totaled $100 thousand in 2017 and was primarily related to the pay-off of a commercial non-accrual PCI loan in the fourth quarter. Interest income recognized on a cash basis totaled $1.4 million in 2016 and was primarily related to the interest recovery upon the pay-off of a partially charged off non-accrual commercial real estate loan during the third quarter. No interest income on impaired loans was recognized on a cash basis in 2015.
Allowance for Credit Losses on Financing Receivables | The following tables disclose activity in the allowance for loan losses ("ALLL") and the recorded investment in loans by class, as well as the related ALLL disaggregated by impairment evaluation method.
Allowance for Loan Losses Rollforward for the Year Ended
(in thousands) | Commercial and industrial |  | Commercial real estate, owner-occupied |  | Commercial real estate, investor |  | Construction |  | Home equity |  | Other residential |  | Installment and other consumer |  | Unallocated |  | Total |
Year ended December 31, 2017 |  |  |  |  |  |  |
Beginning balance | $ | 3,248 |  | $ | 1,753 |  | $ | 6,320 |  | $ | 781 |  | $ | 973 |  | $ | 454 |  | $ | 372 |  | $ | 1,541 |  | $ | 15,442 |
Provision (reversal) | 584 |  | 541 |  | 155 |  | (100 | ) | 58 |  | 82 |  | 3 |  | (823 | ) | 500 |
Charge-offs | (289 | ) | — |  | — |  | — |  | — |  | — |  | (4 | ) | — |  | (293 | )
Recoveries | 111 |  | — |  | — |  | — |  | — |  | — |  | 7 |  | — |  | 118 |
Ending balance | $ | 3,654 |  | $ | 2,294 |  | $ | 6,475 |  | $ | 681 |  | $ | 1,031 |  | $ | 536 |  | $ | 378 |  | $ | 718 |  | $ | 15,767 |
Year ended December 31, 2016 |  |  |  |  |  |  |  |  |
Beginning balance | $ | 3,023 |  | $ | 2,249 |  | $ | 6,178 |  | $ | 724 |  | $ | 910 |  | $ | 394 |  | $ | 425 |  | $ | 1,096 |  | $ | 14,999 |
Provision (reversal) | 93 |  | (476 | ) | (2,014 | ) | 57 |  | 60 |  | 60 |  | (75 | ) | 445 |  | (1,850 | )
Charge-offs | (11 | ) | (20 | ) | — |  | — |  | — |  | — |  | (5 | ) | — |  | (36 | )
Recoveries | 143 |  | — |  | 2,156 |  | — |  | 3 |  | — |  | 27 |  | — |  | 2,329 |
Ending balance | $ | 3,248 |  | $ | 1,753 |  | $ | 6,320 |  | $ | 781 |  | $ | 973 |  | $ | 454 |  | $ | 372 |  | $ | 1,541 |  | $ | 15,442 |
Year ended December 31, 2015 |  |  |  |  |  |  |  |  |
Beginning balance | $ | 2,837 |  | $ | 1,924 |  | $ | 6,672 |  | $ | 839 |  | $ | 859 |  | $ | 433 |  | $ | 566 |  | $ | 969 |  | $ | 15,099 |
Provision (reversal) | (45 | ) | 325 |  | (517 | ) | 724 |  | 48 |  | (39 | ) | (123 | ) | 127 |  | 500 |
Charge-offs | (5 | ) | — |  | — |  | (839 | ) | — |  | — |  | (20 | ) | — |  | (864 | )
Recoveries | 236 |  | — |  | 23 |  | — |  | 3 |  | — |  | 2 |  | — |  | 264 |
Ending balance | $ | 3,023 |  | $ | 2,249 |  | $ | 6,178 |  | $ | 724 |  | $ | 910 |  | $ | 394 |  | $ | 425 |  | $ | 1,096 |  | $ | 14,999 |
Allowance for Loan Losses and Recorded Investment In Loans
(dollars in thousands) | Commercial and industrial |  | Commercial real estate, owner-occupied |  | Commercial real estate, investor |  | Construction |  | Home equity |  | Other residential |  | Installment and other consumer |  | Unallocated |  | Total |
December 31, 2017 |  |  |  |  |  |  |  |  |
Ending ALLL related to loans collectively evaluated for impairment | $ | 3,604 |  | $ | 2,106 |  | $ | 6,316 |  | $ | 674 |  | $ | 1,025 |  | $ | 535 |  | $ | 276 |  | $ | 718 |  | $ | 15,254 |
Ending ALLL related to loans individually evaluated for impairment | 50 |  | 188 |  | 159 |  | 7 |  | 6 |  | 1 |  | 102 |  | — |  | 513 |
Ending ALLL related to purchased credit-impaired loans | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |
Ending balance | $ | 3,654 |  | $ | 2,294 |  | $ | 6,475 |  | $ | 681 |  | $ | 1,031 |  | $ | 536 |  | $ | 378 |  | $ | 718 |  | $ | 15,767 |
Recorded Investment: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collectively evaluated for impairment | $ | 233,605 |  | $ | 292,798 |  | $ | 820,023 |  | $ | 60,859 |  | $ | 131,620 |  | $ | 94,378 |  | $ | 26,689 |  | $ | — |  | $ | 1,659,972 |
Individually evaluated for impairment | 2,165 |  | 6,999 |  | 2,171 |  | 2,969 |  | 753 |  | 1,148 |  | 721 |  | — |  | 16,926 |
Purchased credit-impaired | 65 |  | 1,166 |  | 790 |  | — |  | 94 |  | — |  | — |  | — |  | 2,115 |
Total | $ | 235,835 |  | $ | 300,963 |  | $ | 822,984 |  | $ | 63,828 |  | $ | 132,467 |  | $ | 95,526 |  | $ | 27,410 |  | $ | — |  | $ | 1,679,013 |
Ratio of allowance for loan losses to total loans | 1.55 | % | 0.76 | % | 0.79 | % | 1.07 | % | 0.78 | % | 0.56 | % | 1.38 | % | NM |  | 0.94 | %
Allowance for loan losses to non-accrual loans | NM |  | NM |  | NM |  | NM |  | 254 | % | NM |  | NM |  | NM |  | 3,883 | %
NM - Not Meaningful
Allowance for Loan Losses and Recorded Investment In Loans
(dollars in thousands) | Commercial and industrial |  | Commercial real estate, owner-occupied |  | Commercial real estate, investor |  | Construction |  | Home equity |  | Other residential |  | Installment and other consumer |  | Unallocated |  | Total |
December 31, 2016 |  |  |  |  |  |  |  |  |
Ending ALLL related to loans collectively evaluated for impairment | $ | 2,963 |  | $ | 1,590 |  | $ | 5,945 |  | $ | 773 |  | $ | 966 |  | $ | 399 |  | $ | 274 |  | $ | 1,541 |  | $ | 14,451 |
Ending ALLL related to loans individually evaluated for impairment | 285 |  | 163 |  | 375 |  | 8 |  | 7 |  | 55 |  | 98 |  | — |  | 991 |
Ending ALLL related to purchased credit-impaired loans | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |
Ending balance | $ | 3,248 |  | $ | 1,753 |  | $ | 6,320 |  | $ | 781 |  | $ | 973 |  | $ | 454 |  | $ | 372 |  | $ | 1,541 |  | $ | 15,442 |
Loans outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collectively evaluated for impairment | $ | 216,368 |  | $ | 239,648 |  | $ | 720,266 |  | $ | 71,564 |  | $ | 116,390 |  | $ | 76,584 |  | $ | 24,563 |  | $ | — |  | $ | 1,465,383 |
Individually evaluated for impairment | 2,207 |  | 6,993 |  | 2,256 |  | 3,245 |  | 715 |  | 1,965 |  | 932 |  | — |  | 18,313 |
Purchased credit-impaired | 40 |  | 1,072 |  | 1,706 |  | — |  | 102 |  | — |  | — |  | — |  | 2,920 |
Total | $ | 218,615 |  | $ | 247,713 |  | $ | 724,228 |  | $ | 74,809 |  | $ | 117,207 |  | $ | 78,549 |  | $ | 25,495 |  | $ | — |  | $ | 1,486,616 |
Ratio of allowance for loan losses to total loans | 1.49 | % | 0.71 | % | 0.87 | % | 1.04 | % | 0.83 | % | 0.58 | % | 1.46 | % | NM |  | 1.04 | %
Allowance for loan losses to non-accrual loans | NM |  | NM |  | NM |  | NM |  | 1,071 | % | NM |  | 683 | % | NM |  | 10,650 | %
NM - Not Meaningful
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period | The following table reflects the unpaid principal balance and related carrying value of PCI loans:
PCI Loans | December 31, 2017 | December 31, 2016
(in thousands) | Unpaid Principal Balance |  | Carrying Value |  | Unpaid Principal Balance |  | Carrying Value |
Commercial and industrial | $ | 276 |  | $ | 65 |  | $ | 45 |  | $ | 40 |
Commercial real estate, owner occupied | 1,297 |  | 1,166 |  | 1,344 |  | 1,072 |
Commercial real estate, investor | 1,064 |  | 790 |  | 1,713 |  | 1,706 |
Construction | — |  | — |  | — |  | — |
Home equity | 231 |  | 94 |  | 248 |  | 102 |
Total purchased credit-impaired loans | $ | 2,868 |  | $ | 2,115 |  | $ | 3,350 |  | $ | 2,920 |
The following table presents the fair value of loans acquired from Bank of Napa for PCI loans as of the acquisition date (November 21, 2017):
(in thousands) | PCI loans
Contractually required payments including interest | $ | 1,769 |
Less: contractual cash flows not expected to be collected (nonaccretable difference) | 805 |
Cash flows expected to be collected (undiscounted) | 964 |
Less: interest component of cash flows expected to be collected (accretable yield) | 109 |
Fair value of PCI loans | $ | 855 |
The following table presents the fair value of loans acquired from Bank of Napa for non-PCI loans as of the acquisition date (November 21, 2017):
(in thousands) | Non-PCI loans
Contractually required payments including interest | $ | 183,833 |
Contractual cash flows not expected to be collected | $ | 14,227 |
Fair value of non-PCI loans | $ | 133,865 |
The following table reflects the outstanding balance and related fair value of PCI loans as of the acquisition date:
PCI Loans (in thousands) | Unpaid principal balance |  | Fair value |
Commercial | $ | 417 |  | $ | 70 |
Commercial real estate | 1,070 |  | 785 |
Total purchased credit-impaired loans | $ | 1,487 |  | $ | 855 |
Accretable Yield Activity | The activities in the accretable yield, or income expected to be earned over the remaining lives of the PCI loans were as follows:
Accretable Yield | Years ended
(in thousands) | December 31, 2017 |  | December 31, 2016 |  | December 31, 2015 |
Balance at beginning of period | $ | 1,476 |  | $ | 2,618 |  | $ | 4,027 |
Additions | 109 |  | — |  | — |
Removals 1 | — |  | (778 | ) | (914 | )
Accretion | (331 | ) | (364 | ) | (495 | )
Balance at end of period | $ | 1,254 |  | $ | 1,476 |  | $ | 2,618 |
1 Represents the accretable difference that is relieved when a loan exits the PCI population due to payoff, full charge-off, or transfer to repossessed assets, etc.
Schedule of Related Party Transactions | An analysis of net loans to related parties for each of the three years ended December 31, 2017, 2016 and 2015 is as follows:
(in thousands) | 2017 |  | 2016 |  | 2015 |
Balance at beginning of year | $ | 1,988 |  | $ | 2,562 |  | $ | 3,329 |
Additions | 3,186 |  | — |  | — |
Advances | 74 |  | — |  | 165 |
Repayments | (128 | ) | (574 | ) | (390 | )
Reclassified due to a change in borrower status | 6,732 |  | — |  | (542 | )
Balance at end of year | $ | 11,852 |  | $ | 1,988 |  | $ | 2,562 |

X
- Definition Accretable Yield Activity [Table Text Block] + References No definition available. + Details
Name: | bmrc_AccretableYieldActivityTableTextBlock
Namespace Prefix: | bmrc_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of financing receivables (examples of financing receivables include loans, trade accounts receivable and notes receivable) and activity in the allowance for credit losses account. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
Name: | us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the reconciliation of contractual cash flows to the carrying amount relating to certain loans acquired in a transfer. + References No definition available. + Details
Name: | us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of financing receivables by credit quality indicator. The credit quality indicator is a statistic about the credit quality of financing receivables. Examples include, but not limited to, consumer credit risk scores, credit-rating-agency ratings, an entity's internal credit risk grades, loan-to-value ratios, collateral, collection experience and other internal metrics. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 55 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=82894031&loc=SL6953803-111525 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 29 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953659-111524 + Details
Name: | us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of impaired financing receivables. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivablesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of financing receivables that are past due but not impaired, financing receivables that are 90 days past due and still accruing, and financing receivables on nonaccrual status. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953401-111524 + Details
Name: | us-gaap_PastDueFinancingReceivablesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_ReceivablesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References No definition available. + Details
Name: | us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of financing receivables and troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953682-111524 + Details
Name: | us-gaap_TroubledDebtRestructuringsOnFinancingReceivablesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration