Summary of Unaudited Quarterly Operating Results: Schedule of Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020
Summary of Unaudited Quarterly Operating Results
Interest income	$ 67,949	$ 59,657	$ 52,698	$ 46,673	$ 47,948	$ 49,640	$ 50,452	$ 50,633	$ 52,619	$ 53,599	$ 54,011	$ 57,474
Interest expense	13,330	6,759	3,867	3,407	3,723	4,717	5,768	6,544	8,042	9,431	10,556	12,536
Provision (credit) for credit losses on loans	1,000	2,000			(3,000)	(3,000)	(1,000)	300	1,500	4,500	6,000	3,871
Provision (credit) for unfunded commitments	(159)	1,315	2,223	(193)	1,277	643	(307)	(674)
Net realized gain (loss) on available-for-sale securities	(168)	31		7							78
Non-interest income	7,661	7,984	9,319	9,176	9,198	9,798	9,585	9,736	9,956	9,466	8,261	7,367
Non-interest expense	34,336	34,758	33,004	31,268	35,784	31,339	30,191	30,321	31,073	31,988	29,349	30,815
Provision for income taxes	4,499	4,676	4,699	4,380	4,081	5,375	5,271	5,010	4,172	3,692	3,164	2,751
Net income available to common shareholders	$ 22,604	$ 18,133	$ 18,224	$ 16,987	$ 15,281	$ 20,364	$ 20,114	$ 18,868	$ 17,788	$ 13,454	$ 13,203	$ 14,868
Earnings per common share - diluted	$ 1.84	$ 1.46	$ 1.44	$ 1.30	$ 1.14	$ 1.49	$ 1.46	$ 1.36	$ 1.28	$ 0.96	$ 0.93	$ 1.04