XML 46 R34.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Stockholders' Equity and Stock Plans (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2021
Equity [Abstract] |
Schedule of Information of Cashless Exercise Prices | The table below depicts the total number of shares, amount, and weighted average price withheld for cashless exercises in each of the respective years.
| 2021 | 2020 | 2019
Number of shares withheld | 27,929 |  | 10,001 |  | 7,795 |
Total amount withheld (in thousands) | $ | 1,085 |  | $ | 398 |  | $ | 326 |
Weighted-average price | $ | 38.85 |  | $ | 39.83 |  | $ | 41.84 |
Schedule of Share-based Compensation, Stock Options, Activity | A summary of stock option activity for the years ended December 31, 2021, 2020, and 2019 is presented in the following table. The intrinsic value of options outstanding and exercisable is calculated as the number of in-the-money options times the difference between the market price of our stock and the exercise prices of the in-the-money options as of each year-end period presented.
| Number of Shares | Weighted Average Exercise Price | Aggregate Intrinsic Value (in thousands) | Weighted Average Grant-Date Fair Value | Weighted Average Remaining Contractual Term (in years)
Options outstanding at December 31, 2018 | 425,700 |  | $ | 25.01 |  | $ | 6,910 |  |  | 5.85
Granted | 53,370 |  | 44.01 |  |  | $ | 9.37 |  |
Cancelled, expired or forfeited | (13,580) |  | 38.88 |  |  |  |
Exercised | (48,108) |  | 16.11 |  | 1,247 |  |  |
Options outstanding at December 31, 2019 | 417,382 |  | 28.01 |  | 7,112 |  |  | 5.50
Exercisable (vested) at December 31, 2019 | 333,870 |  | 25.34 |  | 6,581 |  |  | 4.76
Options outstanding at December 31, 2019 | 417,382 |  | 28.01 |  | 7,112 |  |  | 5.50
Granted | 44,632 |  | 39.18 |  |  | 6.84 |  |
Cancelled, expired or forfeited | (17,222) |  | 40.31 |  |  |  |
Exercised | (73,208) |  | 22.26 |  | 1,370 |  |  |
Options outstanding at December 31, 2020 | 371,584 |  | 29.92 |  | 2,262 |  |  | 5.12
Exercisable (vested) at December 31, 2020 | 315,377 |  | 28.05 |  | 2,254 |  |  | 4.53
Options outstanding at December 31, 2020 | 371,584 |  | 29.92 |  | 2,262 |  |  | 5.12
Granted | 55,861 |  | 36.39 |  |  | 8.84 |  |
Cancelled, expired or forfeited | (2,008) |  | 42.50 |  |  |  |
Exercised | (60,056) |  | 23.01 |  | 885 |  |  |
Options outstanding at December 31, 2021 | 365,381 |  | 31.97 |  | 2,326 |  |  | 5.57
Exercisable (vested) at December 31, 2021 | 315,744 |  | 30.85 |  | 2,264 |  |  | 5.15
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range | A summary of the options outstanding and exercisable by price range as of December 31, 2021 is presented in the following table:
| Stock Options Outstanding as of December 31, 2021 |  | Stock Options Exercisable as of December 31, 2021
Range of Exercise Prices | Stock Options Outstanding | Remaining Contractual Life (in years) | Weighted Average Exercise Price |  | Stock Options Exercisable | Weighted Average Exercise Price
$10.00 - $20.00 | 32,852 |  | 0.7 | $ | 19.34 |  |  | 32,852 |  | $ | 19.34 |
$20.01 - $30.00 | 102,374 |  | 3.4 | $ | 24.47 |  |  | 102,374 |  | $ | 24.47 |
$30.01 - $40.00 | 156,415 |  | 7.1 | $ | 34.67 |  |  | 133,131 |  | $ | 34.18 |
$40.01 - $50.00 | 73,740 |  | 7.5 | $ | 42.29 |  |  | 47,387 |  | $ | 42.62 |
| 365,381 |  |  |  |  | 315,744 |  |
Schedule of Unrecognized Compensation Cost, Nonvested Awards | The following table summarizes non-vested restricted stock awards and changes during the years ended December 31, 2021, 2020, and 2019.
| Number of Shares | Weighted Average Grant-Date Fair Value
Non-vested awards at December 31, 2018 | 87,388 |  | $ | 31.26 |
Granted | 29,110 |  | 44.45 |
Vested | (28,099) |  | 27.88 |
Cancelled or forfeited | (18,333) |  | 32.34 |
Non-vested awards at December 31, 2019 | 70,066 |  | 37.81 |
Granted | 29,100 |  | 40.10 |
Vested | (23,524) |  | 36.35 |
Cancelled or forfeited | (14,314) |  | 37.63 |
Non-vested awards at December 31, 2020 | 61,328 |  | 39.50 |
Granted | 30,742 |  | 38.00 |
Vested | (26,392) |  | 36.81 |
Cancelled or forfeited | (3,848) |  | 33.96 |
Non-vested awards at December 31, 2021 | 61,830 |  | 40.25 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions | We determine the fair value of stock options at the grant date using the Black-Scholes pricing model that takes into account the stock price at the grant date, exercise price, and the following assumptions (weighted-average shown).
| Years ended December 31,
| 2021 | 2020 | 2019
Risk-free interest rate | 0.98 | % | 0.91 | % | 2.51 | %
Expected dividend yield on common stock | 2.57 | % | 2.38 | % | 1.75 | %
Expected life in years | 6.1 | 6.1 | 5.8
Expected price volatility | 33.12 | % | 24.43 | % | 22.71 | %
Summary of Cash Dividends Paid to Common Shareholders | Presented below is a summary of cash dividends paid in 2021, 2020 and 2019 to common shareholders, recorded as a reduction from retained earnings. On January 21, 2022, the Board of Directors declared a $0.24 per share cash dividend, paid February 11, 2022 to the shareholders of record at the close of business on February 4, 2022.
| Years ended December 31,
(in thousands except per share data) | 2021 | 2020 | 2019
Cash dividends to common stockholders | $ | 13,107 |  | $ | 12,506 |  | $ | 10,958 |
Cash dividends per common share | $ | 0.94 |  | $ | 0.92 |  | $ | 0.80 |

X
- Definition Share-based Payment Arrangement, Share Information about Cashless Exercises + References No definition available. + Details
Name: | bmrc_ShareBasedPaymentArrangementShareInformationAboutCashlessExercisesTableTextBlock
Namespace Prefix: | bmrc_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of information related to dividends declared, including paid and unpaid dividends. + References No definition available. + Details
Name: | us-gaap_DividendsDeclaredTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of cost not yet recognized and weighted-average period over which cost is expected to be recognized for nonvested award under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfUnrecognizedCompensationCostNonvestedAwardsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration