Employee Benefit Plans	12 Months Ended
Dec. 31, 2019
Retirement Benefits [Abstract]
Employee Benefit Plans	Employee Benefit Plans Employees of the Company are eligible to participate in the Company's 401(k) plan immediately upon date of hire. Employees may elect to have a portion of their salary contributed to the 401(k) plan in accordance with Section 401(k) of the Internal Revenue Code of 1986. The Company provides for a mandatory $1.00 match for each $1.00 contributed by employees of Northrim Bank up to 5.5% of the employee’s eligible salary. The Company provides for a mandatory $1.00 match for each $1.00 contributed by employees of RML up to 2% of the employee’s eligible salary. Northrim Bank or RML may increase the matching contribution at the discretion of the Board of Directors. The Company expensed $1.4 million, $1.4 million, and $1.1 million, in 2019, 2018, and 2017, respectively, for 401(k) contributions and included this expense in "Salaries and other personal expense" in the Consolidated Statements of Income. On July 1, 1994, Northrim Bank implemented a Supplemental Executive Retirement Plan for executive officers of Northrim Bank whose retirement benefits under the 401(k) plan have been limited under provisions of the Internal Revenue Code. Contributions to this plan totaled $262,000, $247,000, and $264,000, in 2019, 2018, and 2017, respectively. These expenses are included in "Salaries and other personnel expense" in the Consolidated Statements of Income. At December 31, 2019 and 2018, the balance of the accrued liability for this plan was included in "Other liabilities" and totaled $2.1 million and $2.2 million, respectively. RML has established a Supplemental Executive Retirement Plan ("SERP"), under which RML has agreed to make payment to certain key executives, based on contributions made by RML to the plan and a variable rate of return. The SERP's assets primarily consist of the cash surrender value of life insurance policies. Contributions and earnings made to the participant accounts to the SERP are vested over ten years. The Company recorded expenses of $580,000, $489,000, and $600,000 in 2019, 2018, and 2017, respectively. RML's recorded obligation under the SERP amounted to $2.8 million and $2.3 million at December 31, 2019 and 2018, respectively, and was included in "Other liabilities". In February of 2002, Northrim Bank implemented a non-qualified deferred compensation plan in which certain of the executive officers participate. Northrim Bank's net liability under this plan is dependent upon market gains and losses on assets held in the plan. Northrim Bank recognized an increase in its liability of $36,000 in 2019, an increase in its liability of $52,000 in 2018, and a decrease in its liability of $140,000 in 2017. These changes are included in "Salaries and other personnel expense" in the Consolidated Statements of Income. At December 31, 2019 and 2018, the balance of the accrued liability for this plan was included in "Other liabilities" and totaled $1.6 million and $1.5 million, respectively. In November of 2011, Northrim Bank implemented a Profit Sharing Plan. All employees of the Bank employed on the last day of the calendar year are eligible and will participate in the Profit Sharing Plan. The aggregate amount to be paid to employees under the Profit Sharing Plan is determined using Company-wide performance goals that are established by the Compensation Committee of the Board of Directors. If the performance goals are met for the year, profit sharing for the period is calculated based on a formula that is also approved by the Compensation Committee each year. The Compensation Committee has complete discretion to designate an employee as ineligible for profit sharing, or to adjust the amount of profit share payments by individual employee or in aggregate. The Compensation Committee approved management’s recommendation based upon the calculated payout under the Profit Sharing Plan’s methodology resulting in aggregate payouts of $2.9 million, $1.3 million, and $1.2 million for 2019, 2018, and 2017, respectively. Information concerning the calculation of employee payments under the Profit Sharing Plan is set forth under the heading “Performance Based Annual Payment” in the Company’s definitive proxy statement for the 2020 Annual Shareholders’ Meeting and is incorporated into this report by reference.

Employee Benefit Plans

Employees of the Company are eligible to participate in the Company's 401(k) plan immediately upon date of hire. Employees may elect to have a portion of their salary contributed to the 401(k) plan in accordance with Section 401(k) of the Internal Revenue Code of 1986. The Company provides for a mandatory $1.00 match for each $1.00 contributed by employees of Northrim Bank up to 5.5% of the employee’s eligible salary. The Company provides for a mandatory $1.00 match for each $1.00 contributed by employees of RML up to 2% of the employee’s eligible salary. Northrim Bank or RML may increase the matching contribution at the discretion of the Board of Directors. The Company expensed $1.4 million, $1.4 million, and $1.1 million, in 2019, 2018, and 2017, respectively, for 401(k) contributions and included this expense in "Salaries and other personal expense" in the Consolidated Statements of Income.

On July 1, 1994, Northrim Bank implemented a Supplemental Executive Retirement Plan for executive officers of Northrim Bank whose retirement benefits under the 401(k) plan have been limited under provisions of the Internal Revenue Code. Contributions to this plan totaled $262,000, $247,000, and $264,000, in 2019, 2018, and 2017, respectively. These expenses are included in "Salaries and other personnel expense" in the Consolidated Statements of Income. At December 31, 2019 and 2018, the balance of the accrued liability for this plan was included in "Other liabilities" and totaled $2.1 million and $2.2 million, respectively.

RML has established a Supplemental Executive Retirement Plan ("SERP"), under which RML has agreed to make payment to certain key executives, based on contributions made by RML to the plan and a variable rate of return. The SERP's assets primarily consist of the cash surrender value of life insurance policies. Contributions and earnings made to the participant accounts to the SERP are vested over ten years. The Company recorded expenses of $580,000, $489,000, and $600,000 in 2019, 2018, and 2017, respectively. RML's recorded obligation under the SERP amounted to $2.8 million and $2.3 million at December 31, 2019 and 2018, respectively, and was included in "Other liabilities".

In February of 2002, Northrim Bank implemented a non-qualified deferred compensation plan in which certain of the executive officers participate. Northrim Bank's net liability under this plan is dependent upon market gains and losses on assets held in the plan. Northrim Bank recognized an increase in its liability of $36,000 in 2019, an increase in its liability of $52,000 in 2018, and a decrease in its liability of $140,000 in 2017. These changes are included in "Salaries and other personnel expense" in the Consolidated Statements of Income. At December 31, 2019 and 2018, the balance of the accrued liability for this plan was included in "Other liabilities" and totaled $1.6 million and $1.5 million, respectively.

In November of 2011, Northrim Bank implemented a Profit Sharing Plan. All employees of the Bank employed on the last day of the calendar year are eligible and will participate in the Profit Sharing Plan. The aggregate amount to be paid to employees under the Profit Sharing Plan is determined using Company-wide performance goals that are established by the Compensation Committee of the Board of Directors. If the performance goals are met for the year, profit sharing for the period is calculated based on a formula that is also approved by the Compensation Committee each year. The Compensation Committee has complete discretion to designate an employee as ineligible for profit sharing, or to adjust the amount of profit share payments by individual employee or in aggregate. The Compensation Committee approved management’s recommendation based upon the calculated payout under the Profit Sharing Plan’s methodology resulting in aggregate payouts of $2.9 million, $1.3 million, and $1.2 million for 2019, 2018, and 2017, respectively. Information concerning the calculation of employee payments under the Profit Sharing Plan is set forth under the heading “Performance Based Annual Payment” in the Company’s definitive proxy statement for the 2020 Annual Shareholders’ Meeting and is incorporated into this report by reference.