Pay vs Performance Disclosure

12 Months Ended

Dec. 31, 2022

USD ($)

$ / shares

Dec. 31, 2021

USD ($)

$ / shares

Dec. 31, 2020

USD ($)

$ / shares

Pay vs Performance Disclosure [Table]

Pay vs Performance [Table Text Block]

											Value of Initial Fixed $100 Investment Based On:
Year	Summary Compensation Table Total for CEO		Compensation Actually Paid to CEO			Average Summary Compensation Table Total for Other NEOs (7)		Average Compensation Actually Paid to Other NEOs			Cumulative TSR	Peer Group Cumulative TSR (8)	Net Income		Earnings Per Share
2022	$	1,239,301	$	1,215,361	(1)	$	611,686	$	600,535	(2)	119.90	99.06	$	63,351,000	$	2.97
2021	1,302,851		1,479,964		(3)	628,013		687,631		(4)	115.02	119.74	62,895,000		2.88
2020	1,293,219		1,158,370		(5)	429,997		315,444		(6)	85.71	87.20	56,152,000		2.53

Named Executive Officers, Footnote [Text Block]

The Named Executives, other than the CEO (the "Other NEOs"), for 2022 were: Gavin Mohr, Patrick Ervin, Stephanie Kimball and Joel Rahn.

The Other NEOs for 2021 were: Gavin Mohr, Patrick Ervin, Stephanie Kimball and Joel Rahn.

The Other NEOs for 2020 were: Gavin Mohr, Patrick Ervin, Stephanie Kimball, Dennis Mack, Robert Shuster and Stephen Erickson.

PEO Total Compensation Amount

$ 1,239,301

$ 1,302,851

$ 1,293,219

PEO Actually Paid Compensation Amount

$ 1,215,361

$ 1,479,964

$ 1,158,370

Adjustment To PEO Compensation, Footnote [Text Block]

Reflects the following adjustments to Mr. Kessel's total compensation for 2022, as reflected in the Summary Compensation Table above:

a.Subtracted $282,638, the aggregate grant date fair value of stock awards granted in 2022.

b.Added (Subtracted):

i.$258,826, the year-end fair value of awards granted during 2022 that remain outstanding and unvested at December 31, 2022;

ii.$(3,876), the change in the year-end fair value (from the prior year-end fair value) of awards granted prior to 2022 that remain outstanding and unvested at December 31, 2022; and

iii.$3,748, the change in the vesting date fair value (from the prior year-end fair value) of awards granted prior to 2022 that vested in 2022.

Reflects the following adjustments to Mr. Kessel's total compensation for 2021, as reflected in the Summary Compensation Table above:

a.Subtracted $272,223, the aggregate grant date fair value of stock awards granted in 2021.

b.Added:

i.$311,895, the year-end fair value of awards granted during 2021 that remain outstanding and unvested at December 31, 2021;

ii.$112,002, the change in the year-end fair value (from the prior year-end fair value) of awards granted prior to 2021 that remain outstanding and unvested at December 31, 2021; and

iii.$25,439, the change in the vesting date fair value (from the prior year-end fair value) of awards granted prior to 2021 that vested in 2021.

Reflects the following adjustments to Mr. Kessel's total compensation for 2020, as reflected in the Summary Compensation Table above:

a.Subtracted $257,400, the aggregate grant date fair value of stock awards granted in 2020.

b.Added (Subtracted):

i.$202,889, the year-end fair value of awards granted during 2020 that remain outstanding and unvested at December 31, 2020;

ii.$(80,339), the change in the year-end fair value (from the prior year-end fair value) of awards granted prior to 2020 that remain outstanding and unvested at December 31, 2020; and

iii.$1, the change in the vesting date fair value (from the prior year-end fair value) of awards granted prior to 2020 that vested in 2020.

Non-PEO NEO Average Total Compensation Amount

$ 611,686

$ 628,013

$ 429,997

Non-PEO NEO Average Compensation Actually Paid Amount

$ 600,535

$ 687,631

$ 315,444

Adjustment to Non-PEO NEO Compensation Footnote [Text Block]

Reflects the following adjustments to the average of the Other NEOs' total compensation for 2022, as reflected in the Summary Compensation Table above:

a.Subtracted $125,959, the average aggregate grant date fair value of stock awards granted to the Other NEOs in 2022.

b.Added (Subtracted):

i.$115,476, the average year-end fair value of awards granted during 2022 that remain outstanding and unvested at December 31, 2022;

ii.$(1,540), the change in the average year-end fair value (from the average prior year-end fair value) of awards granted prior to 2022 that remain outstanding and unvested at December 31, 2022; and

iii.$872, the change in the average vesting date fair value (from the average prior year-end fair value) of awards granted prior to 2022 that vested in 2022.

Reflects the following adjustments to the average of the Other NEOs' total compensation for 2021, as reflected in the Summary Compensation Table above:

a.Subtracted $126,473, the average aggregate grant date fair value of stock awards granted to the Other NEOs in 2021.

b.Added:

i.$145,831, the average year-end fair value of awards granted during 2021 that remain outstanding and unvested at December 31, 2021;

ii.$25,276, the change in the average year-end fair value (from the average prior year-end fair value) of awards granted prior to 2021 that remain outstanding and unvested at December 31, 2021; and

iii.$14,983, the change in the average vesting date fair value (from the average prior year-end fair value) of awards granted prior to 2021 that vested in 2021.

Reflects the following adjustments to the average of the Other NEOs' total compensation for 2020, as reflected in the Summary Compensation Table above:

a.Subtracted $81,195, the average aggregate grant date fair value of stock awards granted to the Other NEOs in 2020.

b.Added (Subtracted):

i.$51,749, the average year-end fair value of awards granted during 2020 that remain outstanding and unvested at December 31, 2020;

ii.$(26,396), the change in the average year-end fair value (from the average prior year-end fair value) of awards granted prior to 2020 that remain outstanding and unvested at December 31, 2020; and

iii.$(14,600), the change in the average vesting date fair value (from the average prior year-end fair value) of awards granted prior to 2020 that vested in 2020.

c.Subtracted $(44,110), the prior year-end fair value of awards that were forfeited during 2020.

The 2020 Other NEO compensation is lower relative to 2021 and 2022 due to certain retirements and terminations of certain Other NEOs during that year.

Compensation Actually Paid vs. Total Shareholder Return [Text Block]

Compensation Actually Paid vs. Net Income [Text Block]

Compensation Actually Paid vs. Company Selected Measure [Text Block]

Total Shareholder Return Vs Peer Group [Text Block]

The peer group for each year presented is the Nasdaq Bank Stock Index.

Total Shareholder Return Amount

$ 119.90

$ 115.02

$ 85.71

Peer Group Total Shareholder Return Amount

99.06

119.74

87.20

Net Income (Loss)

$ 63,351,000

$ 62,895,000

$ 56,152,000

Company Selected Measure Amount | $ / shares

2.97

2.88

2.53

PEO Name

Mr. Kessel

PEO [Member] | Equity Awards Granted During The Year [Member]

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

$ (282,638)

$ (272,223)

$ (257,400)

PEO [Member] | Equity Awards Granted During The Year, Unvested [Member]

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

258,826

311,895

202,889

PEO [Member] | Equity Awards Granted In Prior Years, Unvested [Member]

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

(3,876)

112,002

(80,339)

PEO [Member] | Equity Awards Granted In Prior Years, Vested [Member]

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

$ 3,748

25,439

1

Non-PEO NEO [Member] | Measure [Axis]: 1

Pay vs Performance Disclosure [Table]

Measure Name

Earnings per share

Non-PEO NEO [Member] | Measure [Axis]: 2

Pay vs Performance Disclosure [Table]

Measure Name

Efficiency ratio

Non-PEO NEO [Member] | Measure [Axis]: 3

Pay vs Performance Disclosure [Table]

Measure Name

Non-performing assets to total assets

Non-PEO NEO [Member] | Measure [Axis]: 4

Pay vs Performance Disclosure [Table]

Measure Name

Deposit balance growth

Non-PEO NEO [Member] | Measure [Axis]: 5

Pay vs Performance Disclosure [Table]

Measure Name

Deposit account growth

Non-PEO NEO [Member] | Equity Awards Granted During The Year [Member]

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

$ (125,959)

(126,473)

(81,195)

Non-PEO NEO [Member] | Equity Awards Granted During The Year, Unvested [Member]

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

115,476

145,831

51,749

Non-PEO NEO [Member] | Equity Awards Granted In Prior Years, Unvested [Member]

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

(1,540)

25,276

(26,396)

Non-PEO NEO [Member] | Equity Awards Granted In Prior Years, Vested [Member]

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

$ 872

$ 14,983

(14,600)

Non-PEO NEO [Member] | Equity Awards Forfeited During The Year [Member]

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

$ (44,110)