Employee Benefit Plans	12 Months Ended
Employee Benefit Plans	Dec. 31, 2020
Employee Benefit Plans [Abstract]
Employee Benefit Plans	16. Employee Benefit Plans Profit Sharing Plan The Company, through the Bank, sponsors a Profit Sharing Plan for substantially all full-time employees of the Company with one or more years of service. Participants receive up to two annual employer contributions, one is discretionary and the other is mandatory. The discretionary contributions to the Profit Sharing Plan are determined annually by the Board of Directors. The discretionary contributions totaled $1.5 million, $1.4 million, and $1.2 million for the years ended December 31, 2020, 2019, and 2018, respectively. The mandatory contributions to the Profit Sharing Plan are made according to a predetermined set of criteria. Mandatory contributions totaled $1.7 million, $1.6 million, and $1.4 million for the years ended December 31, 2020, 2019, and 2018, respectively. Company employees are permitted, within limitations imposed by tax law, to make pretax contributions and after tax (Roth) contributions to the 401(k) feature of the Profit Sharing Plan. The Company does not match employee contributions within the 401(k) feature of the Profit Sharing Plan and the Company can terminate the Profit Sharing Plan at any time. Benefits pursuant to the Profit Sharing Plan vest 0% during the first year of participation, 25% per full year thereafter and after five years such benefits are fully vested. Executive Retirement Plan and Life Insurance Arrangements The Company, through the Bank, sponsors an Executive Retirement Plan (“ERP”) for certain executive level employees. The ERP is a non-qualified deferred compensation plan and was developed to supplement the Company’s Profit Sharing Plan, which, as a qualified retirement plan, has a ceiling on benefits as set by the Internal Revenue Service. The ERP is comprised of: (1) a Performance Component which makes contributions based upon long-term cumulative profitability and increase in market value of the Company; (2) a Salary Component which makes contributions based upon participant salary levels; and (3) an Equity Component for which contributions are discretionary and subject to Board of Directors approval. The Company maintains a Rabbi Trust to fund, in part, the ERP. The Rabbi Trust is an irrevocable grantor trust to which the Company may contribute assets for the limited purpose of funding a nonqualified deferred compensation plan. The Company may not use the assets of the Rabbi Trust for any purpose other than meeting its obligations under the ERP, however, the assets of the Rabbi Trust remain subject to the claims of its creditors and are included in the consolidated financial statements. The Company contributes cash to the Rabbi Trust from time to time for the sole purpose of funding the ERP. The Rabbi Trust will use any cash the Company contributes to purchase shares of common stock of the Company, and other financial instruments, on the open market. ERP contributions are invested in a mix of financial instruments; however, the Equity Component contributions are invested primarily in common stock of the Company. The Company expensed $6.8 million to the ERP during the year ended December 31, 2020, $6.6 million during the year ended December 31, 2019 and $6.2 million during the year ended December 31, 2018. The Company’s carrying value of the liability under the ERP was $56.7 million as of December 31, 2020 and $50.5 million as of December 31, 2019. The Company’s shares of common stock held as investments in the Rabbi Trust of the ERP as of December 31, 2020 and 2019 totaled 52,980 and 48,133 with an historical cost basis of $31.2 million and $29.1 million, respectively. All amounts have been fully funded into the Rabbi Trust as of December 31, 2020 and 2019. The consolidated investments held in the Rabbi Trust are recorded at fair value with changes in unrealized gains or losses recorded within non-interest income and the equal and offsetting charges in the related liability are recorded in non-interest expense in the consolidated statements of income. Net gains on ERP plan investments were $1.8 million in 2020 compared to net gains of $2.6 million in 2019. Balances in non-qualified deferred compensation plans may be invested in financial instruments whose market value fluctuates based upon trends in interest rates and stock prices. The Company has purchased single premium life insurance policies on the lives of certain key employees of the Company. These policies provide: (1) financial protection to the Company in the event of the death of a key employee; and (2) significant income to the Company to offset the expense associated with the Executive Retirement Plan and other employee benefit plans, since the interest earned on the cash surrender value of the policies is tax exempt as long as the policies are used to finance employee benefits. As compensation to each employee for agreeing to allow the Company to purchase an insurance policy on his or her life, split dollar agreements have been entered into with those employees. These agreements provide for a division of the life insurance death proceeds between the Company and each employee’s designated beneficiary or beneficiaries. The Company earned tax-exempt interest on the life insurance policies of $2.1 million for the year ended December 31, 2020, $2.0 million for the year ended December 31, 2019, and $1.9 million for the year ended December 31, 2018. As of December 31, 2020 and 2019, the total cash surrender value of the insurance policies was $69.2 million and $67.1 million, respectively. Senior Management Retention Plan The Company, through the Bank, sponsors a Senior Management Retention Plan (“SMRP”) for certain senior level employees. The SMRP is a non-qualified deferred compensation plan and was developed to supplement the Company’s Profit Sharing Plan, which, as a qualified retirement plan, has a ceiling on benefits as set by the Internal Revenue Service. All contributions are discretionary and subject to the Board of Directors approval. The Company maintains a Rabbi Trust to fund, in part, the SMRP. The Rabbi Trust is an irrevocable grantor trust to which the Company may contribute assets for the limited purpose of funding a nonqualified deferred compensation plan. The Company may not use the assets of the Rabbi Trust for any purpose other than meeting its obligations under the SMRP, however, the assets of the Rabbi Trust remain subject to the claims of its creditors and are included in the consolidated financial statements. The Company contributes cash to the Rabbi Trust from time to time for the sole purpose of funding the SMRP. The Rabbi Trust will use any cash the Company contributes to purchase shares of common stock of the Company, and other financial instruments, on the open market. Contributions to the SMRP are invested primarily in common stock of the Company. The Company expensed $2.3 million to the SMRP during the year ended December 31, 2020, $1.3 million during the year ended December 31, 2019 and $1.5 million during the year ended December 31, 2018. The Company’s carrying value of the liability under the SMRP was $8.6 million as of December 31, 2020 and $6.3 million as of December 31, 2019. The Company’s shares of stock held as investments in the Rabbi Trust of the SMRP as of December 31, 2020 and December 31, 2019 totaled 12,548 and 9,822 shares with an historical cost basis of $7.9 million and $5.8 million, respectively. All amounts have been fully funded into the Rabbi Trust as of December 31, 2020 and 2019. The consolidated investments held in the Rabbi Trust are recorded at fair value with changes in unrealized gains or losses recorded within non-interest income and the equal and offsetting charges in the related liability are recorded in non-interest expense in the consolidated statements of income. Net gains on SMRP plan investments were $0.1 million in 2020 compared to zero in 2019. Balances in non-qualified deferred compensation plans may be invested in financial instruments whose market value fluctuates based upon trends in interest rates and stock prices.