Junior Subordinated Debentures Held by Trust Subsidiaries (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Amount of Trust Preferred Securities Issued by Trust	$ 62,250	$ 62,250
Principal Amount of Debenture Issued to Trust	$ 64,178	64,178
Junior Subordinated Debt | SOFR
Debt Instrument [Line Items]
Annual Rate of Trust Preferred Securities and Debentures	0.26161%
Junior Subordinated Notes, Maturing 2033 | Junior Subordinated Debt | Commercebank Capital Trust VI
Debt Instrument [Line Items]
Principal Amount of Debenture Issued to Trust	$ 9,537	9,537
Junior Subordinated Notes, Maturing 2033 | Junior Subordinated Debt | Commercebank Capital Trust VI | 3-M LIBOR
Debt Instrument [Line Items]
Annual Rate of Trust Preferred Securities and Debentures	3.35%
Junior Subordinated Notes, Maturing 2033 | Junior Subordinated Debt | Commercebank Capital Trust VII
Debt Instrument [Line Items]
Principal Amount of Debenture Issued to Trust	$ 8,248	8,248
Junior Subordinated Notes, Maturing 2033 | Junior Subordinated Debt | Commercebank Capital Trust VII | 3-M LIBOR
Debt Instrument [Line Items]
Annual Rate of Trust Preferred Securities and Debentures	3.25%
Junior Subordinated Notes, Maturing 2033 | Commercebank Capital Trust VI
Debt Instrument [Line Items]
Amount of Trust Preferred Securities Issued by Trust	$ 9,250	9,250
Junior Subordinated Notes, Maturing 2033 | Commercebank Capital Trust VII
Debt Instrument [Line Items]
Amount of Trust Preferred Securities Issued by Trust	8,000	8,000
Junior Subordinated Notes, Maturing 2034 | Junior Subordinated Debt | Commercebank Capital Trust VIII
Debt Instrument [Line Items]
Principal Amount of Debenture Issued to Trust	$ 5,155	5,155
Junior Subordinated Notes, Maturing 2034 | Junior Subordinated Debt | Commercebank Capital Trust VIII | 3-M LIBOR
Debt Instrument [Line Items]
Annual Rate of Trust Preferred Securities and Debentures	2.85%
Junior Subordinated Notes, Maturing 2034 | Commercebank Capital Trust VIII
Debt Instrument [Line Items]
Amount of Trust Preferred Securities Issued by Trust	$ 5,000	5,000
Junior Subordinated Notes, Maturing 2038 | Junior Subordinated Debt | Commercebank Capital Trust IX
Debt Instrument [Line Items]
Principal Amount of Debenture Issued to Trust	$ 25,774	25,774
Junior Subordinated Notes, Maturing 2038 | Junior Subordinated Debt | Commercebank Capital Trust IX | 3-M LIBOR
Debt Instrument [Line Items]
Annual Rate of Trust Preferred Securities and Debentures	1.75%
Junior Subordinated Notes, Maturing 2038 | Commercebank Capital Trust IX
Debt Instrument [Line Items]
Amount of Trust Preferred Securities Issued by Trust	$ 25,000	25,000
Junior Subordinated Notes, Maturing 2036 | Junior Subordinated Debt | Commercebank Capital Trust X
Debt Instrument [Line Items]
Principal Amount of Debenture Issued to Trust	$ 15,464	15,464
Junior Subordinated Notes, Maturing 2036 | Junior Subordinated Debt | Commercebank Capital Trust X | 3-M LIBOR
Debt Instrument [Line Items]
Annual Rate of Trust Preferred Securities and Debentures	1.78%
Junior Subordinated Notes, Maturing 2036 | Commercebank Capital Trust X
Debt Instrument [Line Items]
Amount of Trust Preferred Securities Issued by Trust	$ 15,000	$ 15,000