Significant Accounting Policies (Policies)	9 Months Ended
Sep. 30, 2021
Accounting Policies [Abstract]
Marketable Securities, Policy [Policy Text Block]	*Securities Available for Sale* Prior to January 1, 2021, available-for-sale ("AFS") debt securities were measured at fair value and declines in the fair value were reviewed to determine whether the impairment was other-than-temporary. If we did not expect to recover the entire amortized cost basis of the security, then an other-than-temporary impairment (“OTTI”) was considered to have occurred. The cost basis of the security was written down to its estimated fair value and the amount of the write-down was recognized through a charge to earnings. If the amount of the amortized cost basis expected to be recovered increased in a future period, the cost basis of the security was not increased but rather recognized prospectively through interest income. Effective January 1, 2021, upon the adoption of ASU 2016-13, debt securities AFS are measured at fair value and subject to impairment testing. When an AFS debt security is considered impaired, the Company must determine if the decline in fair value has resulted from a credit-related loss or other factors and then, (1) recognize an allowance for credit loss by a charge to earnings for the credit-related component (if any) of the decline in fair value, and (2) recognize in other comprehensive income (loss) any non-credit related components of the fair value change. If the amount of the amortized cost basis expected to be recovered increases in a future period, the valuation reserve would be reduced, but not more than the amount of the current existing reserve for that security. Interest income includes amortization of premiums and discounts as an adjustment of yield on a level-yield basis. Premiums on callable debt securities are amortized to their earliest call date. Gains and losses on sales are recorded on the trade date and determined using the specific identification method. A debt security is placed on nonaccrual status at the time any principal or interest payments become delinquent by 90 days or greater. Interest accrued but not received for a security placed on non-accrual is reversed against interest income. No interest was reversed against interest income during the period.
Allowance for Credit Losses on Available for Sale Debt Securities [Policy Text Block]	*Allowance for Credit Losses on Available for Sale Securities* For AFS debt securities in an unrealized loss position, the Company first assesses whether it intends to sell, or it is more likely than not that it will be required to sell the security before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the security’s amortized cost basis is written down to fair value with the credit component of the unrealized loss of the impaired AFS debt security recognized as an allowance for credit losses, and a corresponding provision for credit losses on the consolidated statement of income and the non-credit component is recognized in other comprehensive income (loss), net of applicable taxes. For AFS debt securities that do not meet the aforementioned criteria, the Company evaluates whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, management considers the extent to which fair value is less than amortized cost, the payment structure of the security, failure of the issuer of the security to make scheduled interest or principal payments, any changes to the rating of the security by a rating agency, and adverse conditions specifically related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. Any fair value changes that has not been recorded through an allowance for credit losses is recognized in other comprehensive income. Changes in the allowance for credit losses are recorded as provision for credit loss expense. Losses are charged against the allowance when management believes the uncollectability of an available-for-sale security is confirmed or when either of the criteria regarding intent or requirement to sell is met. The amortized cost of the Company’s AFS debt securities excludes accrued interest, which is included in “accrued interest receivable” on the Consolidated Balance Sheets. The Company has made an accounting policy election not to measure an allowance for credit losses for accrued interest receivables on AFS debt securities since the Company timely reverses any previously accrued interest when the debt security remains in default for an extended period. As each AFS debt security has a unique security structure, where the accrual status is clearly determined when certain criteria listed in the terms are met, the Company assesses the default status of each security as defined by the debt security’s specific security structure. Trading securities are reported at fair value, with unrealized gains or losses included in income.
Financing Receivable, Held-for-investment [Policy Text Block]	*Loans Held for Investment* Loans receivable that the Company has the intent and ability to hold for the foreseeable future or until maturity are stated at their outstanding principal, reduced by an allowance for loan losses and net of deferred loan fees or costs on originated loans and unamortized premiums or discounts on purchased loans. Nonrefundable fees and direct costs associated with the origination or purchase of loans are deferred and netted against outstanding loan balances. The deferred net loan fees and costs are recognized in interest income as an adjustment to yield over the loan term using the effective interest method or straight-line method. Discounts or premiums on purchased loans are accreted or amortized to interest income using the effective interest method or straight-line method over the remaining period to contractual maturity. Interest on loans is calculated using the simple-interest method on daily balances of the principal amounts outstanding based on an actual or 360-day basis. Generally, loans are placed on nonaccrual status when they become 90 days past due. Loans are considered past due when contractually required principal or interest payments have not been made on the due dates. Loans are also placed on nonaccrual status when management believes, after considering economic and business conditions and collection efforts, that the borrower’s financial condition is such that full collection of principal or interest becomes uncertain, regardless of the length of past due status. Once a loan is placed on nonaccrual status, interest accrual is discontinued, and all unpaid accrued interest is reversed against interest income. As a result, accrued interest receivable does not carry a credit loss reserve. Interest payments received on nonaccrual loans are reflected as a reduction of principal and not as interest income. A loan is returned to accrual status when the borrower has demonstrated a satisfactory payment trend subject to management’s assessment of the borrower’s ability to repay the loan.
Financing Receivable, Held-for-sale [Policy Text Block]	*Loans Held for Sale* Held for sale loans are carried at the lower of aggregate cost or fair value. Gains and losses are recorded in non-interest income based on the difference between sales proceeds, net of sales commissions, and carrying value. When a determination is made at the time of commitment to originate or purchase loans as held-for-investment, it is the Company’s intent to hold these loans to maturity or for the “foreseeable future,” subject to periodic review under the Company’s management evaluation processes, including asset/liability management. When the Company subsequently changes its intent to hold certain loans, the loans are transferred from the loans held-for-investment portfolio at amortized cost to the loans held-for-sale portfolio at lower of aggregate cost or fair value and the existing ACL on the loans transferred is reversed.
Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block]	*Allowance for Credit Losses on Loans Held for Investment.* Effective January 1, 2021, and upon the adoption of ASU 2016-13, the Company replaced the incurred loss accounting approach with the current expected credit loss (“CECL”) approach for financial instruments measured at amortized cost and other commitments to extend credit. CECL requires the immediate recognition of estimated credit losses expected to occur over the estimated remaining life of the asset. The forward-looking concept of CECL requires loss estimates to consider historical experience, current conditions and reasonable and supportable economic forecasts of future events and circumstances. The ACL on loans held for investment is the combination of the allowance for loan losses and the reserve for unfunded loan commitments. The allowance for loan losses is reported as a reduction of the amortized cost basis of loans, while the reserve for unfunded loan commitments is included within "other liabilities" on the Consolidated Balance Sheets (Unaudited). The amortized cost basis of loans does not include accrued interest receivable, which is included in "accrued interest receivable" on the Consolidated Balance Sheets. The "Provision for credit losses" on the Consolidated Statements of Operations and Comprehensive Income (Unaudited) is a combination of the provision for loan losses and the provision for unfunded loan commitments. Under the Company's CECL approach, management estimates the ACL using relevant available information from internal and external sources, relating to past events, current conditions, and reasonable and supportable economic forecasts that vary by loan portfolio. We use economic forecasts from Moody’s Analytics in this process. The economic forecast is updated monthly; therefore, the one used for each quarter-end calculation is generally based on a one-month lag based on the timing of when the forecast is released. The Company does not consider a one-month lag to create a material difference but will consider any subsequent material changes to our estimated loss forecasts as deemed appropriate. Historical credit loss experience provides the basis for the estimation of expected credit losses. Adjustments to historical loss information are made for differences in current loan-specific risk characteristics such as differences in underwriting standards, portfolio mix, delinquency level, or term as well as for changes in environmental conditions, such as changes in gross domestic product (or “GDP”), unemployment rates, property values, or other relevant factors. Under the CECL methodology, quantitative and qualitative loss factors are applied to our population of loans on a collective pool basis when similar risk characteristics exist. When loans do not share similar risk characteristics, the Company would evaluate the loan for expected credit losses on an individual basis. The Company evaluates loans for expected credit losses on an individual basis if, based on current information and events, the loan does not share similar credit risk characteristics with other loans. The Company may choose to measure expected credit losses on an individual loan basis by using one of the following methods: (1) the present value of the expected future cash flows of the loan discounted at the loan’s original effective interest rate, or (2) if the loan is collateral dependent, the fair value of the collateral less costs to sell. For loans that are not collateral-dependent, the Company will use the present value of future cash flows. Under the Company’s CECL methodology, nine portfolio segments with similar risk characteristics are evaluated for expected loss. Six portfolios are modeled using econometric models and three smaller portfolios are evaluated using a simplified loss-rate method that calculates lifetime expected credit losses for the respective pools (simplified approach). The six portfolios subject to econometric modeling include residential mortgages; commercial and industrial loans (“C&I”); construction loans; commercial real estate (“CRE”) for multifamily loans; CRE for owner-occupied loans; and other CRE loans. We estimate the probability of default during the reasonable and supportable forecast period using separate econometric regression models developed to correlate macroeconomic variables, (GDP, unemployment, CRE prices and residential mortgage prices) to historical credit performance for each of the six loan portfolios from 2007 to the fourth quarter of 2020. Loss given default rates would be computed based on the net charge-offs recognized divided by the expected exposure at default of defaulted loans starting with the fourth quarter of 2007 through the fourth quarter of 2020. The probability of default and the loss given default rates are applied to the expected amount at default at the loan level based on contractual scheduled payments and estimated prepayments. The amounts so calculated comprise the quantitative portion of the allowance for credit losses. The Company’s CECL methodology utilizes an eight-quarter reasonable and supportable (“R&S”) forecast period, and a four-quarter reversion period. Management relies on multiple forecasts, blending them into a single loss estimate. Generally speaking, the blended scenario approach would include the Baseline, the Alternative Scenario 1 – Upside – 10th Percentile and the Alternative Scenario 3 – Downside – 90th Percentile forecasts. After the R&S period, the Company will revert linearly for the four-quarter reversion period to the long-term loss rates for each of the six portfolios of loans. The Company’s CECL methodology estimates expected credit losses over the contractual term of the loans, adjusted for expected prepayments when appropriate. The contractual term excludes expected extensions, renewals, and modifications unless either of the following applies: (i) management has a reasonable expectation at the reporting date that a troubled debt restructuring will be executed with an individual borrower or (ii) the extension or renewal options are included in the original or modified contract at the reporting date and are not unconditionally cancellable by the Company. The simplified approach portfolios include Small Business Administration (“SBA”) loans, Home Equity Lines of Credit (“HELOCs”) and cash-secured loans, which are not modelled econometrically due to the low loss history for these three pools of loans. The forecasted loss rate is based on the forecasted GDP and unemployment rates during the first eight quarters of the portfolio’s contractual life, reversion loss rates for the next four quarters of the portfolio’s contractual life on a linear declining rate, and the long-term loss rate projected over the remainder of the portfolio’s contractual life. Under the Company’s CECL methodology, the qualitative portion of the reserve on pooled loans represents management’s judgment of additional considerations to account for internal and external risk factors that are not adequately measured in the quantitative reserve. The qualitative loss factors consider idiosyncratic risk factors, conditions that may not be reflected in quantitatively derived results, or other relevant factors to seek to ensure the allowance for credit losses reflects our best estimate of current expected credit losses. The qualitative reserves include reserves for policy exceptions, experience of management and staff, level of competition in the lending environment, weak risk identification, lack of historical experience with residential mortgage loans made to non-U.S. residents, oil and gas, included as part of the C&I loan portfolio, and the higher risk characteristics of purchased syndicated loans. Current and forecasted economic trends and underlying market values for collateral dependent loans also are considered within the econometric models described above. The Company's CECL methodology requires a significant amount of management judgment in determining the appropriate allowance for credit losses. Several of the steps in the methodology involve judgment and are subjective in nature including, among other things: segmenting the loan portfolio; determining the amount of loss history to consider; selecting predictive econometric regression models that use appropriate macroeconomic variables; determining the methodology to forecast prepayments; selecting the most appropriate economic forecast scenario; determining the length of the R&S forecast and reversion periods; estimating expected utilization rates on unfunded loan commitments; and assessing relevant and appropriate qualitative factors. In addition, the CECL methodology is dependent on economic forecasts that are inherently imprecise and will change from period to period. Although the allowance for credit losses is considered by management to be appropriate, there can be no assurance that it will be sufficient to absorb future losses. Management believes the allowance for credit losses is appropriate for the CECL in our loan portfolio and associated unfunded commitments, and the credit risk ratings and inherent loss rates currently assigned are reasonable and appropriate as of the reporting date. Individually Evaluated Loans Loans that do not share similar risk characteristics with other financial assets are individually evaluated for impairment and excluded from loan pools used within the collective evaluation of estimated credit losses. We defined the following criteria for what constitutes a “default”, which results in a loan no longer sharing similar risk characteristics with other loans, and therefore requires an individual evaluation for expected credit losses. The criteria for default may include any one of the following: on nonaccrual status, modified under a troubled debt restructuring, or payment delinquency of 90 days or more. Impaired Loans Prior to January 1, 2021, a loan or lease was considered impaired when it was probable that we would be unable to collect all amounts due according to the contractual terms of the loan or lease agreement. The measurement of impairment may be based on (1) the present value of the expected future cash flows of the impaired loan discounted at the loan’s original effective interest rate, (2) the observable market price of the impaired loan or (3) the fair value of the collateral of a collateral-dependent loan. The amount by which the recorded investment in the loan exceeds the measure of the impaired loan is recognized by recording a valuation allowance with a corresponding charge to the provision for loan losses. When loans are placed on an impaired status, previously accrued but unpaid interest is reversed against current income and subsequent payments received are generally first applied toward the outstanding principal balance of the loan.
Troubled Debt Restructuring [Policy Text Block]	*Troubled Debt Restructured Loan (“TDR”) A TDR is a formal modification of the terms of a loan when the lender, for economic or legal reasons related to the borrower’s financial difficulties, grants a concession to the borrower. The concessions may* be granted in various forms, including reduction in the stated interest rate, reduction in the loan balance or accrued interest, or extension of the maturity date. Although these loan modifications are considered TDRs, TDR loans that have, pursuant to the Bank’s policy, performed under the restructured terms and have demonstrated sustained performance under the modified terms for six months are returned to accrual status. The sustained performance considered by management pursuant to its policy includes the periods prior to the modification if the prior performance met or exceeded the modified terms. This would include cash paid by the borrower prior to the restructure to set up interest reserves. Loans classified as TDRs are reported as individually evaluated loans. The allowance for credit loss on a TDR is measured using the same method as all other loans held for investment, except when the value of a concession cannot be measured using a method other than the discounted cash flow method. When the value of a concession is measured using the discounted cash flow method, the allowance for credit loss is determined by discounting the expected future cash flows at the original interest rate of the loan. The Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”) as extended by the Consolidated Appropriation Act, 2021 (“CAA”) permits financial institutions to suspend requirements under GAAP for loan modifications to borrowers affected by COVID-19 and is intended to provide interpretive guidance as to conditions that would constitute a short-term modification that would not meet the definition of a TDR. Such conditions include the following (i) the loan modification is made between March 1, 2020 and the earlier of January 1, 2022 or 60 days after the end of the coronavirus emergency declaration and (ii) the applicable loan was not more than 30 days past due as of December 31, 2019.
Loan Commitments, Policy [Policy Text Block]	*Unfunded Loan Commitments* Unfunded loan commitments are generally related to providing credit facilities to clients of the Bank and are not actively traded financial instruments. These unfunded commitments are disclosed as off-balance sheet financial instruments in Note 9 in the Notes to Consolidated Financial Statements (Unaudited). The Company estimates expected credit losses over the contractual period in which the Company is exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by the Company, using the same loss factors as used for the allowance for loan losses. The reserve for unfunded loan commitments uses the expected historical usage rate of the unfunded commitments during the contractual life of the commitments. The allowance for unfunded commitments is included in “other liabilities” on the Consolidated Balance Sheets. Changes in the allowance for unfunded commitments are included in the provision for loan losses.

Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2021

Marketable Securities, Policy [Policy Text Block]

Securities Available for Sale

Prior to January 1, 2021, available-for-sale ("AFS") debt securities were measured at fair value and declines in the fair value were reviewed to determine whether the impairment was other-than-temporary. If we did not expect to recover the entire amortized cost basis of the security, then an other-than-temporary impairment (“OTTI”) was considered to have occurred. The cost basis of the security was written down to its estimated fair value and the amount of the write-down was recognized through a charge to earnings. If the amount of the amortized cost basis expected to be recovered increased in a future period, the cost basis of the security was not increased but rather recognized prospectively through interest income.

Effective January 1, 2021, upon the adoption of ASU 2016-13, debt securities AFS are measured at fair value and subject to impairment testing. When an AFS debt security is considered impaired, the Company must determine if the decline in fair value has resulted from a credit-related loss or other factors and then, (1) recognize an allowance for credit loss by a charge to earnings for the credit-related component (if any) of the decline in fair value, and (2) recognize in other comprehensive income (loss) any non-credit related components of the fair value change. If the amount of the amortized cost basis expected to be recovered increases in a future period, the valuation reserve would be reduced, but not more than the amount of the current existing reserve for that security.

Interest income includes amortization of premiums and discounts as an adjustment of yield on a level-yield basis. Premiums on callable debt securities are amortized to their earliest call date. Gains and losses on sales are recorded on the trade date and determined using the specific identification method.

A debt security is placed on nonaccrual status at the time any principal or interest payments become delinquent by 90 days or greater. Interest accrued but not received for a security placed on non-accrual is reversed against interest income. No interest was reversed against interest income during the period.

Allowance for Credit Losses on Available for Sale Debt Securities [Policy Text Block]

Allowance for Credit Losses on Available for Sale Securities

For AFS debt securities in an unrealized loss position, the Company first assesses whether it intends to sell, or it is more likely than not that it will be required to sell the security before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the security’s amortized cost basis is written down to fair value with the credit component of the unrealized loss of the impaired AFS debt security recognized as an allowance for credit losses, and a corresponding provision for credit losses on the consolidated statement of income and the non-credit component is recognized in other comprehensive income (loss), net of applicable taxes. For AFS debt securities that do not meet the aforementioned criteria, the Company evaluates whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, management considers the extent to which fair value is less than amortized cost, the payment structure of the security, failure of the issuer of the security to make scheduled interest or principal payments, any changes to the rating of the security by a rating agency, and adverse conditions specifically related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. Any fair value changes that has not been recorded through an allowance for credit losses is recognized in other comprehensive income.

Changes in the allowance for credit losses are recorded as provision for credit loss expense. Losses are charged against the allowance when management believes the uncollectability of an available-for-sale security is confirmed or when either of the criteria regarding intent or requirement to sell is met.

The amortized cost of the Company’s AFS debt securities excludes accrued interest, which is included in “accrued interest receivable” on the Consolidated Balance Sheets. The Company has made an accounting policy election not to measure an allowance for credit losses for accrued interest receivables on AFS debt securities since the Company timely reverses any previously accrued interest when the debt security remains in default for an extended period. As each AFS debt security has a unique security structure, where the accrual status is clearly determined when certain criteria listed in the terms are met, the Company assesses the default status of each security as defined by the debt security’s specific security structure.

Trading securities are reported at fair value, with unrealized gains or losses included in income.

Financing Receivable, Held-for-investment [Policy Text Block]

Loans Held for Investment

Loans receivable that the Company has the intent and ability to hold for the foreseeable future or until maturity are stated at their outstanding principal, reduced by an allowance for loan losses and net of deferred loan fees or costs on originated loans and unamortized premiums or discounts on purchased loans. Nonrefundable fees and direct costs associated with the origination or purchase of loans are deferred and netted against outstanding loan balances. The deferred net loan fees and costs are recognized in interest income as an adjustment to yield over the loan term using the effective interest method or straight-line method. Discounts or premiums on purchased loans are accreted or amortized to interest income using the effective interest method or straight-line method over the remaining period to contractual maturity. Interest on loans is calculated using the simple-interest method on daily balances of the principal amounts outstanding based on an actual or 360-day basis.

Generally, loans are placed on nonaccrual status when they become 90 days past due. Loans are considered past due when contractually required principal or interest payments have not been made on the due dates. Loans are also placed on nonaccrual status when management believes, after considering economic and business conditions and collection efforts, that the borrower’s financial condition is such that full collection of principal or interest becomes uncertain, regardless of the length of past due status. Once a loan is placed on nonaccrual status, interest accrual is discontinued, and all unpaid accrued interest is reversed against interest income. As a result, accrued interest receivable does not carry a credit loss reserve. Interest payments received on nonaccrual loans are reflected as a reduction of principal and not as interest income. A loan is returned to accrual status when the borrower has demonstrated a satisfactory payment trend subject to management’s assessment of the borrower’s ability to repay the loan.

Financing Receivable, Held-for-sale [Policy Text Block]

Loans Held for Sale

Held for sale loans are carried at the lower of aggregate cost or fair value. Gains and losses are recorded in non-interest income based on the difference between sales proceeds, net of sales commissions, and carrying value. When a determination is made at the time of commitment to originate or purchase loans as held-for-investment, it is the Company’s intent to hold these loans to maturity or for the “foreseeable future,” subject to periodic review under the Company’s management evaluation processes, including asset/liability management. When the Company subsequently changes its intent to hold certain loans, the loans are transferred from the loans held-for-investment portfolio at amortized cost to the loans held-for-sale portfolio at lower of aggregate cost or fair value and the existing ACL on the loans transferred is reversed.

Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block]

Allowance for Credit Losses on Loans Held for Investment.

Effective January 1, 2021, and upon the adoption of ASU 2016-13, the Company replaced the incurred loss accounting approach with the current expected credit loss (“CECL”) approach for financial instruments measured at amortized cost and other commitments to extend credit. CECL requires the immediate recognition of estimated credit losses expected to occur over the estimated remaining life of the asset. The forward-looking concept of CECL requires loss estimates to consider historical experience, current conditions and reasonable and supportable economic forecasts of future events and circumstances.

The ACL on loans held for investment is the combination of the allowance for loan losses and the reserve for unfunded loan commitments. The allowance for loan losses is reported as a reduction of the amortized cost basis of loans, while the reserve for unfunded loan commitments is included within "other liabilities" on the Consolidated Balance Sheets (Unaudited). The amortized cost basis of loans does not include accrued interest receivable, which is included in "accrued interest receivable" on the Consolidated Balance Sheets. The "Provision for credit losses" on the Consolidated Statements of Operations and Comprehensive Income (Unaudited) is a combination of the provision for loan losses and the provision for unfunded loan commitments.

Under the Company's CECL approach, management estimates the ACL using relevant available information from internal and external sources, relating to past events, current conditions, and reasonable and supportable economic forecasts that vary by loan portfolio. We use economic forecasts from Moody’s Analytics in this process. The economic forecast is updated monthly; therefore, the one used for each quarter-end calculation is generally based on a one-month lag based on the timing of when the forecast is released. The Company does not consider a one-month lag to create a material difference but will consider any subsequent material changes to our estimated loss forecasts as deemed appropriate. Historical credit loss experience provides the basis for the estimation of expected credit losses. Adjustments to historical loss information are made for differences in current loan-specific risk characteristics such as differences in underwriting standards, portfolio mix, delinquency level, or term as well as for changes in environmental conditions, such as changes in gross domestic product (or “GDP”), unemployment rates, property values, or other relevant factors.

Under the CECL methodology, quantitative and qualitative loss factors are applied to our population of loans on a collective pool basis when similar risk characteristics exist. When loans do not share similar risk characteristics, the Company would evaluate the loan for expected credit losses on an individual basis. The Company evaluates loans for expected credit losses on an individual basis if, based on current information and events, the loan does not share similar credit risk characteristics with other loans. The Company may choose to measure expected credit losses on an individual loan basis by using one of the following methods: (1) the present value of the expected future cash flows of the loan discounted at the loan’s original effective interest rate, or (2) if the loan is collateral dependent, the fair value of the collateral less costs to sell. For loans that are not collateral-dependent, the Company will use the present value of future cash flows.

Under the Company’s CECL methodology, nine portfolio segments with similar risk characteristics are evaluated for expected loss. Six portfolios are modeled using econometric models and three smaller portfolios are evaluated using a simplified loss-rate method that calculates lifetime expected credit losses for the respective pools (simplified approach). The six portfolios subject to econometric modeling include residential mortgages; commercial and industrial loans (“C&I”); construction loans; commercial real estate (“CRE”) for multifamily loans; CRE for owner-occupied loans; and other CRE loans. We estimate the probability of default during the reasonable and supportable forecast period using separate econometric regression models developed to correlate macroeconomic variables, (GDP, unemployment, CRE prices and residential mortgage prices) to historical credit performance for each of the six loan portfolios from 2007 to the fourth quarter of 2020. Loss given default rates would be computed based on the net charge-offs recognized divided by the expected exposure at default of defaulted loans starting with the fourth quarter of 2007 through the fourth quarter of 2020. The probability of default and the loss given default rates are applied to the expected amount at default at the loan level based on contractual scheduled payments and estimated prepayments. The amounts so calculated comprise the quantitative portion of the allowance for credit losses.

The Company’s CECL methodology utilizes an eight-quarter reasonable and supportable (“R&S”) forecast period, and a four-quarter reversion period. Management relies on multiple forecasts, blending them into a single loss estimate. Generally speaking, the blended scenario approach would include the Baseline, the Alternative Scenario 1 – Upside – 10th Percentile and the Alternative Scenario 3 – Downside – 90th Percentile forecasts. After the R&S period, the Company will revert linearly for the four-quarter reversion period to the long-term loss rates for each of the six portfolios of loans.

The Company’s CECL methodology estimates expected credit losses over the contractual term of the loans, adjusted for expected prepayments when appropriate. The contractual term excludes expected extensions, renewals, and modifications unless either of the following applies: (i) management has a reasonable expectation at the reporting date that a troubled debt restructuring will be executed with an individual borrower or (ii) the extension or renewal options are included in the original or modified contract at the reporting date and are not unconditionally cancellable by the Company.

The simplified approach portfolios include Small Business Administration (“SBA”) loans, Home Equity Lines of Credit (“HELOCs”) and cash-secured loans, which are not modelled econometrically due to the low loss history for these three pools of loans. The forecasted loss rate is based on the forecasted GDP and unemployment rates during the first eight quarters of the portfolio’s contractual life, reversion loss rates for the next four quarters of the portfolio’s contractual life on a linear declining rate, and the long-term loss rate projected over the remainder of the portfolio’s contractual life.

Under the Company’s CECL methodology, the qualitative portion of the reserve on pooled loans represents management’s judgment of additional considerations to account for internal and external risk factors that are not adequately measured in the quantitative reserve. The qualitative loss factors consider idiosyncratic risk factors, conditions that may not be reflected in quantitatively derived results, or other relevant factors to seek to ensure the allowance for credit losses reflects our best estimate of current expected credit losses. The qualitative reserves include reserves for policy exceptions, experience of management and staff, level of competition in the lending environment, weak risk identification, lack of historical experience with residential mortgage loans made to non-U.S. residents, oil and gas, included as part of the C&I loan portfolio, and the higher risk characteristics of purchased syndicated loans. Current and forecasted economic trends and underlying market values for collateral dependent loans also are considered within the econometric models described above.

The Company's CECL methodology requires a significant amount of management judgment in determining the appropriate allowance for credit losses. Several of the steps in the methodology involve judgment and are subjective in nature including, among other things: segmenting the loan portfolio; determining the amount of loss history to consider; selecting predictive econometric regression models that use appropriate macroeconomic variables; determining the methodology to forecast prepayments; selecting the most appropriate economic forecast scenario; determining the length of the R&S forecast and reversion periods; estimating expected utilization rates on unfunded loan commitments; and assessing relevant and appropriate qualitative factors. In addition, the CECL methodology is dependent on economic forecasts that are inherently imprecise and will change from period to period. Although the allowance for credit losses is considered by management to be appropriate, there can be no assurance that it will be sufficient to absorb future losses.

Management believes the allowance for credit losses is appropriate for the CECL in our loan portfolio and associated unfunded commitments, and the credit risk ratings and inherent loss rates currently assigned are reasonable and appropriate as of the reporting date.

Individually Evaluated Loans

Loans that do not share similar risk characteristics with other financial assets are individually evaluated for impairment and excluded from loan pools used within the collective evaluation of estimated credit losses. We defined the following criteria for what constitutes a “default”, which results in a loan no longer sharing similar risk characteristics with other loans, and therefore requires an individual evaluation for expected credit losses. The criteria for default may include any one of the following: on nonaccrual status, modified under a troubled debt restructuring, or payment delinquency of 90 days or more.

Impaired Loans

Prior to January 1, 2021, a loan or lease was considered impaired when it was probable that we would be unable to collect all amounts due according to the contractual terms of the loan or lease agreement. The measurement of impairment may be based on (1) the present value of the expected future cash flows of the impaired loan discounted at the loan’s original effective interest rate, (2) the observable market price of the impaired loan or (3) the fair value of the collateral of a collateral-dependent loan. The amount by which the recorded investment in the loan exceeds the measure of the impaired loan is recognized by recording a valuation allowance with a corresponding charge to the provision for loan losses. When loans are placed on an impaired status, previously accrued but unpaid interest is reversed against current income and subsequent payments received are generally first applied toward the outstanding principal balance of the loan.

Troubled Debt Restructuring [Policy Text Block]

Troubled Debt Restructured Loan (“TDR”)

A TDR is a formal modification of the terms of a loan when the lender, for economic or legal reasons related to the borrower’s financial difficulties, grants a concession to the borrower. The concessions may be granted in various forms, including reduction in the stated interest rate, reduction in the loan balance or accrued interest, or extension of the maturity date. Although these loan modifications are considered TDRs, TDR loans that have, pursuant to the Bank’s policy, performed under the restructured terms and have demonstrated sustained performance under the modified terms for six months are returned to accrual status. The sustained performance considered by management pursuant to its policy includes the periods prior to the modification if the prior performance met or exceeded the modified terms. This would include cash paid by the borrower prior to the restructure to set up interest reserves. Loans classified as TDRs are reported as individually evaluated loans.

The allowance for credit loss on a TDR is measured using the same method as all other loans held for investment, except when the value of a concession cannot be measured using a method other than the discounted cash flow method. When the value of a concession is measured using the discounted cash flow method, the allowance for credit loss is determined by discounting the expected future cash flows at the original interest rate of the loan.

The Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”) as extended by the Consolidated Appropriation Act, 2021 (“CAA”) permits financial institutions to suspend requirements under GAAP for loan modifications to borrowers affected by COVID-19 and is intended to provide interpretive guidance as to conditions that would constitute a short-term modification that would not meet the definition of a TDR. Such conditions include the following (i) the loan modification is made between March 1, 2020 and the earlier of January 1, 2022 or 60 days after the end of the coronavirus emergency declaration and (ii) the applicable loan was not more than 30 days past due as of December 31, 2019.

Loan Commitments, Policy [Policy Text Block]

Unfunded Loan Commitments

Unfunded loan commitments are generally related to providing credit facilities to clients of the Bank and are not actively traded financial instruments. These unfunded commitments are disclosed as off-balance sheet financial instruments in Note 9 in the Notes to Consolidated Financial Statements (Unaudited).

The Company estimates expected credit losses over the contractual period in which the Company is exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by the Company, using the same loss factors as used for the allowance for loan losses. The reserve for unfunded loan commitments uses the expected historical usage rate of the unfunded commitments during the contractual life of the commitments. The allowance for unfunded commitments is included in “other liabilities” on the Consolidated Balance Sheets. Changes in the allowance for unfunded commitments are included in the provision for loan losses.