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Pay vs Performance Disclosure
 12 Months Ended
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Pay vs Performance Disclosure [Table]      
Pay vs Performance [Table Text Block]
Pay Versus Performance
As required by Section 953(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act, and Item 402(v) of Regulation S-K, we are providing the following information about the relationship between executive compensation actually paid and certain financial performance of the Company. For further information concerning the Company’s variable pay-for-performance philosophy and how the Company’s aligns executive compensation with the Company’s performance, refer to “Executive Compensation—Compensation Discussion and Analysis.”
The following tables set forth information concerning the compensation of our NEOs for the fiscal years ending December 31, 2020, 2021, and 2022.
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
Value of Initial $100
Fixed Investment Based
On:
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
​ Year
(a) 		​ ​ ​
Summary
Comp for
Principal
Executive
Officer
(PEO)
(b)1
​ ​ ​
Comp
Actually
Paid to
PEO
(c)2
​ ​ ​
Average
Summary
Comp for
Other
Named
Executive
Officers
(NEOs)
(d)3
​ ​ ​
Average
Comp
Actually
Paid to
Other
NEOs
(e)4
​ ​ ​
Total
Shareholder
Return
(TSR)
(f)5
​ ​ ​
TSR
of Peer
Group
(g)6
​ ​ ​
Net Income
(in thousands)
(h)7
​ ​ ​
Company
Selected
Measure–
Adjusted
Return on
Assets
(i)8
​
​ 2022 ​ ​ ​ ​ $ 1,809,632 ​ ​ ​ ​ ​ $ 1,889,352 ​ ​ ​ ​ ​ $ 745,898 ​ ​ ​ ​ ​ $ 750,137 ​ ​ ​ ​ ​ $ 142.65 ​ ​ ​ ​ ​ $ 108.65 ​ ​ ​ ​ ​ $ 43,557 ​ ​ ​ ​ ​ ​ 1.17% ​ ​
​ 2021 ​ ​ ​ ​ ​ 1,661,531 ​ ​ ​ ​ ​ ​ 1,970,250 ​ ​ ​ ​ ​ ​ 618,349 ​ ​ ​ ​ ​ ​ 720,925 ​ ​ ​ ​ ​ ​ 124.33 ​ ​ ​ ​ ​ ​ 108.25 ​ ​ ​ ​ ​ ​ 39,299 ​ ​ ​ ​ ​ ​ 1.10% ​ ​
​ 2020 ​ ​ ​ ​ ​ 1,577,467 ​ ​ ​ ​ ​ ​ 1,495,406 ​ ​ ​ ​ ​ ​ 704,049 ​ ​ ​ ​ ​ ​ 674,936 ​ ​ ​ ​ ​ ​ 93.93 ​ ​ ​ ​ ​ ​ 82.00 ​ ​ ​ ​ ​ ​ 33,244 ​ ​ ​ ​ ​ ​ 0.93% ​ ​
​
1.
The dollar amounts reported in column (b) are the amounts of total compensation reported for Mr. Simard (our CEO) for each corresponding year in the “Total” column of the Summary Compensation Table.
​
 ​
​
2.
The dollar amounts reported in column (c) represent the amount of “compensation actually paid” to Mr. Simard, as computed in accordance with Item 402(v) of Regulation S-K. The dollar amounts do not reflect the actual amount of compensation earned by or paid to Mr. Simard during the applicable year. In accordance with the requirements of Item 402(v) of Regulation S-K, the following adjustments were made to Mr. Simard’s total compensation for each year to determine the compensation actually paid:
​
 ​
​
Year
​ ​ ​
Reported Summary
Compensation
Table Total for PEO
​ ​ ​
Reported Value of
Equity Awards(a)
​ ​ ​
Equity Award
Adjustments(b)
​ ​ ​
Compensation
Actually Paid
to PEO
​
​ 2022 ​ ​ ​ ​ $ 1,809,632 ​ ​ ​ ​ ​ $ (541,994) ​ ​ ​ ​ ​ $ 621,714 ​ ​ ​ ​ ​ $ 1,889,352 ​ ​
​ 2021 ​ ​ ​ ​ ​ 1,661,531 ​ ​ ​ ​ ​ ​ (438,555) ​ ​ ​ ​ ​ ​ 747,274 ​ ​ ​ ​ ​ ​ 1,970,250 ​ ​
​ 2020 ​ ​ ​ ​ ​ 1,577,467 ​ ​ ​ ​ ​ ​ (425,764) ​ ​ ​ ​ ​ ​ 343,703 ​ ​ ​ ​ ​ ​ 1,495,406 ​ ​
​
(a)
The grant date fair value of equity awards represents the total of the amounts reported in the “Stock Awards” column in the Summary Compensation Table for the applicable year.
​
 ​
​
(b)
The equity award adjustments for each applicable year include the addition (or subtraction, as applicable) of the following: (i) the year-end fair value of any equity awards granted in the applicable year that are outstanding and unvested as of the end of the year; (ii) the amount of change as of the end of the applicable year (from the end of the prior fiscal year) in fair value of any awards granted in prior years that are outstanding and unvested as of the end of the applicable year; (iii) for awards that are granted and vest in same applicable year, the fair value as of the vesting date; (iv) for awards granted in prior years that vest in the applicable year, the amount equal to the change as of the vesting date (from the end of the prior fiscal year) in fair value; (v) for awards granted in prior years that are determined to fail to meet the applicable vesting conditions during the applicable year, a deduction for the amount equal to the fair value at the end of the prior fiscal year; and (vi) the dollar value of any dividends or other earnings paid on awards in the applicable year prior to the vesting date that are not otherwise reflected in the fair value of such award or included in any other component of total compensation for the applicable year. The valuation assumptions used to calculate fair values did not materially differ from those disclosed at the time of grant. The amounts deducted or added in calculating the equity award adjustments are as follows:
​
 ​
​
Year
​ ​ ​
Year End
Fair Value
of
Equity
Awards
Granted
During
the Year
​ ​ ​
Year over
Year Change
in Fair
Value of
Outstanding
and
Unvested
Equity
Awards
Granted
in the
Prior Year
​ ​ ​
Fair Value
at the
End of
the Prior
Year of
Equity
Awards
that
Failed to
Meet
Vesting
Conditions
in the Year
​ ​ ​
Year over
Year
Change
in Fair
Value of
Equity
Awards
Granted in
Prior
Years
that
Vested
in the Year
​ ​ ​
Value of
Dividends or
other
Earnings
Paid on
Stock or
Option
Awards not
Otherwise
Reflected
in Fair Value
or Total
Compensation
​ ​ ​
Total Equity
Award
Adjustments
​
​ 2022 ​ ​ ​ ​ $ 609,529 ​ ​ ​ ​ ​ $ 92,097 ​ ​ ​ ​ ​ $ (79,837) ​ ​ ​ ​ ​ $ (9,968) ​ ​ ​ ​ ​ $ 9,893 ​ ​ ​ ​ ​ $ 621,714 ​ ​
​ 2021 ​ ​ ​ ​ ​ 563,634 ​ ​ ​ ​ ​ ​ 140,525 ​ ​ ​ ​ ​ ​ — ​ ​ ​ ​ ​ ​ 43,115 ​ ​ ​ ​ ​ ​ — ​ ​ ​ ​ ​ ​ 747,274 ​ ​
​ 2020 ​ ​ ​ ​ ​ 501,690 ​ ​ ​ ​ ​ ​ (84,420) ​ ​ ​ ​ ​ ​ — ​ ​ ​ ​ ​ ​ (73,567) ​ ​ ​ ​ ​ ​ — ​ ​ ​ ​ ​ ​ 343,703 ​ ​
​
3.
The dollar amounts reported in column (d) represent the average of the amounts reported for the Company’s named executive officers (NEOs) as a group (excluding Mr. Simard, who has served as our CEO since 2013) in the “Total” column of the Summary Compensation Table in each applicable year. The names of each of the NEOs (excluding Mr. Simard), including for purposes of calculating the average amounts in each applicable year are as follows: (i) for 2022, Josephine Iannelli, Marion Colombo, John M. Mercier, and Jason Edgar; and (ii) for 2021 and 2020, Josephine Iannelli, Richard B. Maltz, Marion Colombo, and John M. Mercier.
​
 ​
​
4.
The dollar amounts reported in column (e) represent the average amount of “compensation actually paid” to the NEOs as a group (excluding Mr. Simard), as computed in accordance with Item 402(v) of Regulation S-K. The dollar amounts do not reflect the actual average amount of compensation earned by or paid to the NEOs as a group (excluding Mr. Simard) during the applicable year. In accordance with the requirements of Item 402(v) of Regulation S-K, the following adjustments were made to average total compensation for the NEOs as a group (excluding Mr. Simard) for each year to determine the compensation actually paid, using the same methodology described above in Note 2:
​
 ​
​
Year
​ ​ ​
Average Reported
Summary
Compensation
Table Total
for Non-PEO NEOs
​ ​ ​
Average
Reported
Value
of Equity
Awards
(a)
​ ​ ​
Average
Equity
Adjustments
(b)
​ ​ ​
Average
Compensation
Actually
Paid to
Non-PEO NEOs
​
​ 2022 ​ ​ ​ ​ $ 745,898 ​ ​ ​ ​ ​ $ (155,940) ​ ​ ​ ​ ​ $ 160,179 ​ ​ ​ ​ ​ $ 750,137 ​ ​
​ 2021 ​ ​ ​ ​ ​ 618,349 ​ ​ ​ ​ ​ ​ (99,138) ​ ​ ​ ​ ​ ​ 201,714 ​ ​ ​ ​ ​ ​ 720,925 ​ ​
​ 2020 ​ ​ ​ ​ ​ 704,049 ​ ​ ​ ​ ​ ​ (138,261) ​ ​ ​ ​ ​ ​ 109,148 ​ ​ ​ ​ ​ ​ 674,936 ​ ​
​
The amounts deducted or added in calculating the total average equity award adjustments are as follows:
​
​
Year
​ ​
Average
Year End
Fair Value of
Equity
Awards
Granted
During
the Year
​ ​
Average
Year over
Year Change
in Fair
Value of
Outstanding
and Unvested
Equity Awards
Granted in
the Prior Year
​ ​
Average
Fair Value
at the End
of the
Prior Year
of Equity
Awards that
Failed to
Meet Vesting
Conditions
in the
Year
​ ​
Average
Year over
Year Change
in Fair
Value of
Equity
Awards
Granted in
Prior Years
that Vested
in the
Year
​ ​
Average
Value of
Dividends
or other
Earnings
Paid on
Stock or
Option
Awards not
Otherwise
Reflected
in Fair Value
or Total
Compensation
​ ​
Total
Average
Equity
Award
Adjustments
​
​ 2022 ​ ​ ​ $ 175,371 ​ ​ ​ ​ $ 11,604 ​ ​ ​ ​ $ (28,446) ​ ​ ​ ​ $ (1,196) ​ ​ ​ ​ $ 2,846 ​ ​ ​ ​ $ 160,179 ​ ​
​ 2021 ​ ​ ​ ​ 169,883 ​ ​ ​ ​ ​ 19,643 ​ ​ ​ ​ ​ — ​ ​ ​ ​ ​ 12,188 ​ ​ ​ ​ ​ — ​ ​ ​ ​ ​ 201,714 ​ ​
​ 2020 ​ ​ ​ ​ 155,730 ​ ​ ​ ​ ​ (12,361) ​ ​ ​ ​ ​ — ​ ​ ​ ​ ​ (34,221) ​ ​ ​ ​ ​ — ​ ​ ​ ​ ​ 109,148 ​ ​
​
5.
Cumulative TSR is calculated by dividing the sum of the cumulative amount of dividends for the measurement period, assuming dividend reinvestment, and the difference between the Company’s share price at the end and the beginning of the measurement period by the Company’s share price at the beginning of the measurement period.
​
 ​
​
6.
Represents the weighted peer group TSR, weighted according to the respective companies’ stock market capitalization at the beginning of each period for which a return is indicated. The peer group used for this purpose is the Compensation Peer Group. Our Compensation Peer Group for the 2022 reporting year is disclosed under the heading “Market Benchmarking and Performance Comparisons” and found on page 38 of this proxy statement. Our Compensation Peer Group for the 2021 and 2020 reporting years are disclosed under the heading “Market Benchmarking and Performance Comparisons” on Form DEF14A dated April 1, 2022 and on Form DEF14A dated April 1, 2021, respectively.
​
 ​
​
7.
The dollar amounts reported represent the amount of net income reflected in the Company’s audited financial statements for the applicable year.
​
 ​
​
8.
This is a non-GAAP measure that excludes gains or losses on sale of securities, gains or losses on sale of premises and equipment, gains or losses on other real estate owned, losses on extinguishments of debt, acquisition, conversion and other non-recurring expenses, net of tax.
​
 ​
   
Company Selected Measure Name Adjusted Return on Assets    
Named Executive Officers, Footnote [Text Block] 3.
The dollar amounts reported in column (d) represent the average of the amounts reported for the Company’s named executive officers (NEOs) as a group (excluding Mr. Simard, who has served as our CEO since 2013) in the “Total” column of the Summary Compensation Table in each applicable year. The names of each of the NEOs (excluding Mr. Simard), including for purposes of calculating the average amounts in each applicable year are as follows: (i) for 2022, Josephine Iannelli, Marion Colombo, John M. Mercier, and Jason Edgar; and (ii) for 2021 and 2020, Josephine Iannelli, Richard B. Maltz, Marion Colombo, and John M. Mercier. 		   
Peer Group Issuers, Footnote [Text Block] 6.
Represents the weighted peer group TSR, weighted according to the respective companies’ stock market capitalization at the beginning of each period for which a return is indicated. The peer group used for this purpose is the Compensation Peer Group. Our Compensation Peer Group for the 2022 reporting year is disclosed under the heading “Market Benchmarking and Performance Comparisons” and found on page 38 of this proxy statement. Our Compensation Peer Group for the 2021 and 2020 reporting years are disclosed under the heading “Market Benchmarking and Performance Comparisons” on Form DEF14A dated April 1, 2022 and on Form DEF14A dated April 1, 2021, respectively. 		   
PEO Total Compensation Amount $ 1,809,632 $ 1,661,531 $ 1,577,467
PEO Actually Paid Compensation Amount $ 1,889,352 1,970,250 1,495,406
Adjustment To PEO Compensation, Footnote [Text Block] 2.
The dollar amounts reported in column (c) represent the amount of “compensation actually paid” to Mr. Simard, as computed in accordance with Item 402(v) of Regulation S-K. The dollar amounts do not reflect the actual amount of compensation earned by or paid to Mr. Simard during the applicable year. In accordance with the requirements of Item 402(v) of Regulation S-K, the following adjustments were made to Mr. Simard’s total compensation for each year to determine the compensation actually paid:
​
​
​
Year
​ ​ ​
Reported Summary
Compensation
Table Total for PEO
​ ​ ​
Reported Value of
Equity Awards(a)
​ ​ ​
Equity Award
Adjustments(b)
​ ​ ​
Compensation
Actually Paid
to PEO
​
​ 2022 ​ ​ ​ ​ $ 1,809,632 ​ ​ ​ ​ ​ $ (541,994) ​ ​ ​ ​ ​ $ 621,714 ​ ​ ​ ​ ​ $ 1,889,352 ​ ​
​ 2021 ​ ​ ​ ​ ​ 1,661,531 ​ ​ ​ ​ ​ ​ (438,555) ​ ​ ​ ​ ​ ​ 747,274 ​ ​ ​ ​ ​ ​ 1,970,250 ​ ​
​ 2020 ​ ​ ​ ​ ​ 1,577,467 ​ ​ ​ ​ ​ ​ (425,764) ​ ​ ​ ​ ​ ​ 343,703 ​ ​ ​ ​ ​ ​ 1,495,406 ​ ​
​
(a)
The grant date fair value of equity awards represents the total of the amounts reported in the “Stock Awards” column in the Summary Compensation Table for the applicable year.
​
 ​
​
(b)
The equity award adjustments for each applicable year include the addition (or subtraction, as applicable) of the following: (i) the year-end fair value of any equity awards granted in the applicable year that are outstanding and unvested as of the end of the year; (ii) the amount of change as of the end of the applicable year (from the end of the prior fiscal year) in fair value of any awards granted in prior years that are outstanding and unvested as of the end of the applicable year; (iii) for awards that are granted and vest in same applicable year, the fair value as of the vesting date; (iv) for awards granted in prior years that vest in the applicable year, the amount equal to the change as of the vesting date (from the end of the prior fiscal year) in fair value; (v) for awards granted in prior years that are determined to fail to meet the applicable vesting conditions during the applicable year, a deduction for the amount equal to the fair value at the end of the prior fiscal year; and (vi) the dollar value of any dividends or other earnings paid on awards in the applicable year prior to the vesting date that are not otherwise reflected in the fair value of such award or included in any other component of total compensation for the applicable year. The valuation assumptions used to calculate fair values did not materially differ from those disclosed at the time of grant. The amounts deducted or added in calculating the equity award adjustments are as follows:
​
 ​
​
Year
​ ​ ​
Year End
Fair Value
of
Equity
Awards
Granted
During
the Year
​ ​ ​
Year over
Year Change
in Fair
Value of
Outstanding
and
Unvested
Equity
Awards
Granted
in the
Prior Year
​ ​ ​
Fair Value
at the
End of
the Prior
Year of
Equity
Awards
that
Failed to
Meet
Vesting
Conditions
in the Year
​ ​ ​
Year over
Year
Change
in Fair
Value of
Equity
Awards
Granted in
Prior
Years
that
Vested
in the Year
​ ​ ​
Value of
Dividends or
other
Earnings
Paid on
Stock or
Option
Awards not
Otherwise
Reflected
in Fair Value
or Total
Compensation
​ ​ ​
Total Equity
Award
Adjustments
​
​ 2022 ​ ​ ​ ​ $ 609,529 ​ ​ ​ ​ ​ $ 92,097 ​ ​ ​ ​ ​ $ (79,837) ​ ​ ​ ​ ​ $ (9,968) ​ ​ ​ ​ ​ $ 9,893 ​ ​ ​ ​ ​ $ 621,714 ​ ​
​ 2021 ​ ​ ​ ​ ​ 563,634 ​ ​ ​ ​ ​ ​ 140,525 ​ ​ ​ ​ ​ ​ — ​ ​ ​ ​ ​ ​ 43,115 ​ ​ ​ ​ ​ ​ — ​ ​ ​ ​ ​ ​ 747,274 ​ ​
​ 2020 ​ ​ ​ ​ ​ 501,690 ​ ​ ​ ​ ​ ​ (84,420) ​ ​ ​ ​ ​ ​ — ​ ​ ​ ​ ​ ​ (73,567) ​ ​ ​ ​ ​ ​ — ​ ​ ​ ​ ​ ​ 343,703 ​ ​
   
Non-PEO NEO Average Total Compensation Amount $ 745,898 618,349 704,049
Non-PEO NEO Average Compensation Actually Paid Amount $ 750,137 720,925 674,936
Adjustment to Non-PEO NEO Compensation Footnote [Text Block] 4.
The dollar amounts reported in column (e) represent the average amount of “compensation actually paid” to the NEOs as a group (excluding Mr. Simard), as computed in accordance with Item 402(v) of Regulation S-K. The dollar amounts do not reflect the actual average amount of compensation earned by or paid to the NEOs as a group (excluding Mr. Simard) during the applicable year. In accordance with the requirements of Item 402(v) of Regulation S-K, the following adjustments were made to average total compensation for the NEOs as a group (excluding Mr. Simard) for each year to determine the compensation actually paid, using the same methodology described above in Note 2:
​
​
​
Year
​ ​ ​
Average Reported
Summary
Compensation
Table Total
for Non-PEO NEOs
​ ​ ​
Average
Reported
Value
of Equity
Awards
(a)
​ ​ ​
Average
Equity
Adjustments
(b)
​ ​ ​
Average
Compensation
Actually
Paid to
Non-PEO NEOs
​
​ 2022 ​ ​ ​ ​ $ 745,898 ​ ​ ​ ​ ​ $ (155,940) ​ ​ ​ ​ ​ $ 160,179 ​ ​ ​ ​ ​ $ 750,137 ​ ​
​ 2021 ​ ​ ​ ​ ​ 618,349 ​ ​ ​ ​ ​ ​ (99,138) ​ ​ ​ ​ ​ ​ 201,714 ​ ​ ​ ​ ​ ​ 720,925 ​ ​
​ 2020 ​ ​ ​ ​ ​ 704,049 ​ ​ ​ ​ ​ ​ (138,261) ​ ​ ​ ​ ​ ​ 109,148 ​ ​ ​ ​ ​ ​ 674,936 ​ ​
​
The amounts deducted or added in calculating the total average equity award adjustments are as follows:
​
​
Year
​ ​
Average
Year End
Fair Value of
Equity
Awards
Granted
During
the Year
​ ​
Average
Year over
Year Change
in Fair
Value of
Outstanding
and Unvested
Equity Awards
Granted in
the Prior Year
​ ​
Average
Fair Value
at the End
of the
Prior Year
of Equity
Awards that
Failed to
Meet Vesting
Conditions
in the
Year
​ ​
Average
Year over
Year Change
in Fair
Value of
Equity
Awards
Granted in
Prior Years
that Vested
in the
Year
​ ​
Average
Value of
Dividends
or other
Earnings
Paid on
Stock or
Option
Awards not
Otherwise
Reflected
in Fair Value
or Total
Compensation
​ ​
Total
Average
Equity
Award
Adjustments
​
​ 2022 ​ ​ ​ $ 175,371 ​ ​ ​ ​ $ 11,604 ​ ​ ​ ​ $ (28,446) ​ ​ ​ ​ $ (1,196) ​ ​ ​ ​ $ 2,846 ​ ​ ​ ​ $ 160,179 ​ ​
​ 2021 ​ ​ ​ ​ 169,883 ​ ​ ​ ​ ​ 19,643 ​ ​ ​ ​ ​ — ​ ​ ​ ​ ​ 12,188 ​ ​ ​ ​ ​ — ​ ​ ​ ​ ​ 201,714 ​ ​
​ 2020 ​ ​ ​ ​ 155,730 ​ ​ ​ ​ ​ (12,361) ​ ​ ​ ​ ​ — ​ ​ ​ ​ ​ (34,221) ​ ​ ​ ​ ​ — ​ ​ ​ ​ ​ 109,148 ​ ​
   
Compensation Actually Paid vs. Total Shareholder Return [Text Block]
PEO and Non-PEO Compensation Actually Paid and TSR and Peer TSR
[MISSING IMAGE: bc_tsr-pn.jpg]
   
Compensation Actually Paid vs. Net Income [Text Block]
PEO and Non-PEO Compensation Actually Paid and Net Income
[MISSING IMAGE: bc_netincome-pn.jpg]
   
Compensation Actually Paid vs. Company Selected Measure [Text Block]
PEO and Non-PEO Compensation Actually Paid and Adjusted Return on Assets
[MISSING IMAGE: bc_nonpeo-pn.jpg]
   
Tabular List [Table Text Block]
Key Performance Measurements
The Company considers the following the most important financial performance measures it used to link executive compensation actually paid to its NEOs, for the most recently completed fiscal year, to company performance:
•
Net income
​
•
Adjusted net income (non-GAAP)8
​
•
Adjusted return on assets (non-GAAP)8
​
•
Adjusted return on equity (non-GAAP)8
​
•
Non-performing loans to total loans ratio
​
•
Efficiency ratio8
   
Total Shareholder Return Amount $ 142.65 124.33 93.93
Peer Group Total Shareholder Return Amount 108.65 108.25 82
Net Income (Loss) $ 43,557,000 $ 39,299,000 $ 33,244,000
Company Selected Measure Amount 1.17 1.1 0.93
PEO Name Mr. Simard Mr. Simard Mr. Simard
Measure [Axis]: 1      
Pay vs Performance Disclosure [Table]      
Measure Name Net income    
Non-GAAP Measure Description [Text Block] 8.
This is a non-GAAP measure that excludes gains or losses on sale of securities, gains or losses on sale of premises and equipment, gains or losses on other real estate owned, losses on extinguishments of debt, acquisition, conversion and other non-recurring expenses, net of tax. 		   
Measure [Axis]: 2      
Pay vs Performance Disclosure [Table]      
Measure Name Adjusted net income (non-GAAP)    
Measure [Axis]: 3      
Pay vs Performance Disclosure [Table]      
Measure Name Adjusted return on assets (non-GAAP)    
Measure [Axis]: 4      
Pay vs Performance Disclosure [Table]      
Measure Name Adjusted return on equity (non-GAAP)    
Measure [Axis]: 5      
Pay vs Performance Disclosure [Table]      
Measure Name Non-performing loans to total loans ratio    
Measure [Axis]: 6      
Pay vs Performance Disclosure [Table]      
Measure Name Efficiency ratio    
PEO [Member]      
Pay vs Performance Disclosure [Table]      
Equity Awards $ (541,994) $ (438,555) $ (425,764)
PEO [Member] | Total Net Adjustments For Equity Awards [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount 621,714 747,274 343,703
PEO [Member] | Year-end Fair Value Of Awards Granted In The Current Fiscal Year [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount 609,529 563,634 501,690
PEO [Member] | Change In Fair Value Of Outstanding And Unvested Awards Granted In Prior Fiscal Years [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount 92,097 140,525 (84,420)
PEO [Member] | Adjustments For Equity Awards Failed To Meet Performance Conditions [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount (79,837)    
PEO [Member] | Change In Fair Value As Of Vesting Date Of Prior Year Awards Vested During Current Year [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount (9,968) 43,115 (73,567)
PEO [Member] | Dividends Or Other Earnings Paid On Equity Awards Not Otherwise Reflected In Fair Value [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount 9,893    
Non-PEO NEO [Member]      
Pay vs Performance Disclosure [Table]      
Equity Awards (155,940) (99,138) (138,261)
Non-PEO NEO [Member] | Total Net Adjustments For Equity Awards [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount 160,179 201,714 109,148
Non-PEO NEO [Member] | Year-end Fair Value Of Awards Granted In The Current Fiscal Year [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount 175,371 169,883 155,730
Non-PEO NEO [Member] | Change In Fair Value Of Outstanding And Unvested Awards Granted In Prior Fiscal Years [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount 11,604 19,643 (12,361)
Non-PEO NEO [Member] | Adjustments For Equity Awards Failed To Meet Performance Conditions [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount (28,446)    
Non-PEO NEO [Member] | Change In Fair Value As Of Vesting Date Of Prior Year Awards Vested During Current Year [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount (1,196) $ 12,188 $ (34,221)
Non-PEO NEO [Member] | Dividends Or Other Earnings Paid On Equity Awards Not Otherwise Reflected In Fair Value [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount $ 2,846