Junior Subordinated Debentures	12 Months Ended
Dec. 31, 2019
Junior Subordinated Notes [Abstract]
Junior Subordinated Debentures	Junior Subordinated Debentures In May of 2003, the Company formed a wholly-owned Delaware statutory business trust subsidiary, Northrim Capital Trust 1 (the “Trust”), which issued $8 million of guaranteed undivided beneficial interests in the Company’s Junior Subordinated Deferrable Interest Debentures (“Trust Preferred Securities”). These debentures qualified as Tier 1 capital under Federal Reserve Board guidelines. All of the common securities of the Trust were owned by the Company. The proceeds from the issuance of the common securities and the Trust Preferred Securities were used by the Trust to purchase $8.2 million of junior subordinated debentures of the Company. The Trust was not consolidated in the Company’s financial statements in accordance with GAAP; therefore, the Company recorded its investment in the Trust as another asset and the subordinated debentures as a liability. The debentures, which represent the sole asset of the Trust, accrued and paid distributions quarterly at a variable rate of 90-day LIBOR plus 3.15% per annum, adjusted quarterly, of the stated liquidation value of $1,000 per capital security. The interest cost to the Company on these debentures was zero, zero, and $219,000 in 2019, 2018, and 2017, respectively. The Company entered into contractual arrangements which, taken collectively, fully and unconditionally guaranteed payment of: (i) accrued and unpaid distributions required to be paid on the Trust Preferred Securities; (ii) the redemption price with respect to any Trust Preferred Securities called for redemption by the Trust; and (iii) payments due upon a voluntary or involuntary dissolution, winding up or liquidation of the Trust. The Trust Preferred Securities were mandatorily redeemable upon maturity of the debentures on May 15, 2033, or upon earlier redemption as provided in the indenture. The Company redeemed the debentures purchased by the Trust in whole, on August 15, 2017. As specified in the indenture, the redemption price was the principal amount and all accrued but unpaid interest. In December of 2005, the Company formed a wholly-owned Connecticut statutory business trust subsidiary, Northrim Statutory Trust 2 (the “Trust 2”), which issued $10 million of guaranteed undivided beneficial interests in the Company’s Junior Subordinated Deferrable Interest Debentures (“Trust Preferred Securities 2”). These debentures qualify as Tier 1 capital under Federal Reserve Board guidelines. All of the common securities of Trust 2 are owned by the Company. The proceeds from the issuance of the common securities and the Trust Preferred Securities 2 were used by Trust 2 to purchase $10.3 million of junior subordinated debentures of the Company. Trust 2 is not consolidated in the Company’s financial statements in accordance with GAAP; therefore, the Company has recorded its investment in Trust 2 as an other asset and the subordinated debentures as a liability. The debentures, which represent the sole asset of Trust 2, accrue and pay distributions quarterly at a variable rate of 90-day LIBOR plus 1.37% per annum, adjusted quarterly, of the stated liquidation value of $1,000 per capital security. The interest rate on these debentures was 3.26% at December 31, 2019. The interest cost to the Company on these debentures was $398,000, $368,000, and $268,000 in 2019, 2018, and 2017, respectively. The Company has entered into contractual arrangements which, taken collectively, fully and unconditionally guarantee payment of: (i) accrued and unpaid distributions required to be paid on the Trust Preferred Securities 2; (ii) the redemption price with respect to any Trust Preferred Securities 2 called for redemption by Trust 2; and (iii) payments due upon a voluntary or involuntary dissolution, winding up or liquidation of Trust 2. The Trust Preferred Securities 2 are mandatorily redeemable upon maturity of the debentures on March 15, 2036, or upon earlier redemption as provided in the indenture. The Company has the right to redeem the debentures purchased by Trust 2 in whole or in part, on or after March 15, 2011. As specified in the indenture, if the debentures are redeemed prior to maturity, the redemption price will be the principal amount and any accrued but unpaid interest.

Junior Subordinated Debentures

In May of 2003, the Company formed a wholly-owned Delaware statutory business trust subsidiary, Northrim Capital Trust 1 (the “Trust”), which issued $8 million of guaranteed undivided beneficial interests in the Company’s Junior Subordinated Deferrable Interest Debentures (“Trust Preferred Securities”). These debentures qualified as Tier 1 capital under Federal Reserve Board guidelines. All of the common securities of the Trust were owned by the Company. The proceeds from the issuance of the common securities and the Trust Preferred Securities were used by the Trust to purchase $8.2 million of junior subordinated debentures of the Company. The Trust was not consolidated in the Company’s financial statements in accordance with GAAP; therefore, the Company recorded its investment in the Trust as another asset and the subordinated debentures as a liability. The debentures, which represent the sole asset of the Trust, accrued and paid distributions quarterly at a variable rate of 90-day LIBOR plus 3.15% per annum, adjusted quarterly, of the stated liquidation value of $1,000 per capital security. The interest cost to the Company on these debentures was zero, zero, and $219,000 in 2019, 2018, and 2017, respectively. The Company entered into contractual arrangements which, taken collectively, fully and unconditionally guaranteed payment of: (i) accrued and unpaid distributions required to be paid on the Trust Preferred Securities; (ii) the redemption price with respect to any Trust Preferred Securities called for redemption by the Trust; and (iii) payments due upon a voluntary or involuntary dissolution, winding up or liquidation of the Trust. The Trust Preferred Securities were mandatorily redeemable upon maturity of the debentures on May 15, 2033, or upon earlier redemption as provided in the indenture. The Company redeemed the debentures purchased by the Trust in whole, on August 15, 2017. As specified in the indenture, the redemption price was the principal amount and all accrued but unpaid interest.

In December of 2005, the Company formed a wholly-owned Connecticut statutory business trust subsidiary, Northrim Statutory Trust 2 (the “Trust 2”), which issued $10 million of guaranteed undivided beneficial interests in the Company’s Junior Subordinated Deferrable Interest Debentures (“Trust Preferred Securities 2”). These debentures qualify as Tier 1 capital under Federal Reserve Board guidelines. All of the common securities of Trust 2 are owned by the Company. The proceeds from the issuance of the common securities and the Trust Preferred Securities 2 were used by Trust 2 to purchase $10.3 million of junior subordinated debentures of the Company. Trust 2 is not consolidated in the Company’s financial statements in accordance with GAAP; therefore, the Company has recorded its investment in Trust 2 as an other asset and the subordinated debentures as a liability. The debentures, which represent the sole asset of Trust 2, accrue and pay distributions quarterly at a variable rate of 90-day LIBOR plus 1.37% per annum, adjusted quarterly, of the stated liquidation value of $1,000 per capital security. The interest rate on these debentures was 3.26% at December 31, 2019. The interest cost to the Company on these debentures was $398,000, $368,000, and $268,000 in 2019, 2018, and 2017, respectively. The Company has entered into contractual arrangements which, taken collectively, fully and unconditionally guarantee payment of: (i) accrued and unpaid distributions required to be paid on the Trust Preferred Securities 2; (ii) the redemption price with respect to any Trust Preferred Securities 2 called for redemption by Trust 2; and (iii) payments due upon a voluntary or involuntary dissolution, winding up or liquidation of Trust 2. The Trust Preferred Securities 2 are mandatorily redeemable upon maturity of the debentures on March 15, 2036, or upon earlier redemption as provided in the indenture. The Company has the right to redeem the debentures purchased by Trust 2 in whole or in part, on or after March 15, 2011. As specified in the indenture, if the debentures are redeemed prior to maturity, the redemption price will be the principal amount and any accrued but unpaid interest.