The First Bancorp, Inc. (FNLC) 10-Q 7 May 21 2021 Q1 Quarterly report Financial data

Cover

Cover - shares	3 Months Ended
	Mar. 31, 2021	May 01, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2021
Entity File Number	0-26589
Entity Registrant Name	FIRST BANCORP, INC
Entity Incorporation, State or Country Code	ME
Entity Tax Identification Number	01-0404322
Entity Address, Address Line One	Main Street
Entity Address, City or Town	Damariscotta
Entity Address, State or Province	ME
Entity Address, Postal Zip Code	04543
City Area Code	207
Local Phone Number	563-3195
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		10,986,494
Entity Central Index Key	0000765207
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Amendment Flag	false

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Assets
Cash and cash equivalents	$ 20,029	$ 26,212	$ 21,117
Interest bearing deposits in other banks	104,602	56,151	6,047
Securities available for sale	294,537	313,376	312,928
Securities to be held to maturity (fair value of $388,836,000 at March 31, 2021, $377,134,000 at December 31, 2020 and $349,248,000 at March 31, 2020)	385,352	365,613	341,592
Restricted equity securities, at cost	10,105	10,545	9,994
Loans held for sale	3,522	5,855	561
Loans	1,516,772	1,476,761	1,344,208
Less allowance for loan losses	16,594	16,253	11,858
Net loans	1,500,178	1,460,508	1,332,350
Accrued interest receivable	10,847	9,298	9,648
Premises and equipment, net	29,985	27,251	21,156
Other real estate owned	401	908	316
Goodwill	30,646	30,646	29,805
Other assets	46,664	54,873	50,882
Total assets	2,436,868	2,361,236	2,136,396
Liabilities
Demand deposits	275,898	250,219	153,477
NOW deposits	541,684	520,385	382,307
Money market deposits	175,887	163,819	161,184
Savings deposits	325,758	304,603	236,706
Certificates of deposit	634,330	605,585	710,938
Total deposits	1,953,557	1,844,611	1,644,612
Borrowed funds – short term	174,552	206,940	192,937
Borrowed funds – long term	55,096	55,098	55,103
Other liabilities	25,479	30,861	28,487
Total liabilities	2,208,684	2,137,510	1,921,139
Shareholders' equity
Common stock, one cent par value per share	110	110	109
Additional paid-in capital	65,755	65,285	64,277
Retained earnings	163,659	158,359	147,904
Accumulated other comprehensive income (loss)
Net unrealized gain on securities available for sale	219	5,009	7,890
Net unrealized loss on securities transferred from available for sale to held to maturity	(124)	(133)	(174)
Net unrealized loss on cash flow hedging derivative instruments	(1,463)	(4,932)	(4,773)
Net unrealized gain on postretirement costs	28	28	24
Total shareholders' equity	228,184	223,726	215,257
Total liabilities & shareholders' equity	$ 2,436,868	$ 2,361,236	$ 2,136,396
Common Stock
Number of shares authorized (in shares)	18,000,000	18,000,000	18,000,000
Number of shares issued (in shares)	10,983,258	10,950,289	10,921,206
Number of shares outstanding (in shares)	10,983,258	10,950,289	10,921,206
Book value per common share (usd per share)	$ 20.78	$ 20.43	$ 19.71
Tangible book value per common share (usd per share)	$ 17.96	$ 17.60	$ 16.97

Consolidated Balance Sheets (_2

Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Assets [Abstract]
Securities to be held to maturity, fair value	$ 388,836	$ 377,134	$ 349,248
Stockholders' Equity [Abstract]
Common stock par value (usd per share)	$ 0.01	$ 0.01	$ 0.01

Consolidated Statements of Inco

Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Interest income
Interest and fees on loans (includes tax-exempt income of $290,000 YTD March 31, 2021 and $310,000 YTD March 31, 2020)	$ 15,119	$ 15,856
Interest on deposits with other banks	12	74
Interest and dividends on investments (includes tax-exempt income of $1,956,000 YTD March 31, 2021 and $1,841,000 YTD March 31, 2020)	3,822	4,764
Total interest income	18,953	20,694
Interest expense
Interest on deposits	2,198	5,186
Interest on borrowed funds	882	590
Total interest expense	3,080	5,776
Net interest income	15,873	14,918
Provision for loan losses	525	400
Net interest income after provision for loan losses	15,348	14,518
Non-interest income
Net securities gains	119	752
Other operating income	1,810	1,494
Total non-interest income	5,298	4,221
Non-interest expense
Salaries and employee benefits	5,123	5,025
Occupancy expense	753	713
Furniture and equipment expense	1,215	1,116
FDIC insurance premiums	199	173
Amortization of identified intangibles	17	11
Other operating expense	2,567	4,005
Total non-interest expense	9,874	11,043
Income before income taxes	10,772	7,696
Income tax expense	1,850	1,201
NET INCOME	$ 8,922	$ 6,495
Basic earnings per common share (usd per share)	$ 0.82	$ 0.60
Diluted earnings per common share (usd per share)	$ 0.81	$ 0.60
Other comprehensive income (loss) net of tax
Net unrealized gain (loss) on securities available for sale	$ (4,790)	$ 4,233
Net unrealized gain on securities transferred from available for sale to held to maturity, net of amortization	9	8
Net unrealized gain (loss) on cash flow hedging derivative instruments	3,469	(4,870)
Other comprehensive loss	(1,312)	(629)
Comprehensive income	7,610	5,866
Investment management and fiduciary income
Non-interest income
Revenue from Contract with Customer, Including Assessed Tax	1,065	894
Service charges on deposit accounts
Non-interest income
Revenue from Contract with Customer, Including Assessed Tax	337	577
Mortgage origination and servicing income, net of amortization
Non-interest income
Revenue from Contract with Customer, Including Assessed Tax	$ 1,967	$ 504

Consolidated Statements of In_2

Consolidated Statements of Income and Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Interest and fees on loans (tax-exempt income)	$ 290	$ 310
Interest and dividends on investments (tax-exempt income)	$ 1,956	$ 1,841

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common stock and additional paid-in capital	Retained earnings	Accumulated other comprehensive income (loss)
Beginning balance (in shares) at Dec. 31, 2019		10,899,210
Balance at beginning of period at Dec. 31, 2019	$ 212,508	$ 64,073	$ 144,839	$ 3,596
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,495		6,495
Net unrealized gain on securities available for sale, net of tax	4,233			4,233
Net unrealized gain on securities transferred from available for sale to held to maturity, net of amortization	8			8
Net unrealized gain (loss) on cash flow hedging derivative instruments	(4,870)			(4,870)
Comprehensive income (loss)	5,866		6,495	(629)
Cash dividend declared	(3,276)		(3,276)
Equity compensation expense	150	$ 150
Payment to repurchase common stock (in shares)		(5,297)
Payment to repurchase common stock	(154)		(154)
Issuance of restricted stock (in shares)		21,595
Proceeds from sale of common stock (in shares)		5,698
Proceeds from sale of common stock	$ 163	$ 163
Ending balance (in shares) at Mar. 31, 2020	10,921,206	10,921,206
Balance at end of period at Mar. 31, 2020	$ 215,257	$ 64,386	147,904	2,967
Beginning balance (in shares) at Dec. 31, 2020	10,950,289	10,950,289
Balance at beginning of period at Dec. 31, 2020	$ 223,726	$ 65,395	158,359	(28)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	8,922		8,922
Net unrealized gain on securities available for sale, net of tax	(4,790)			(4,790)
Net unrealized gain on securities transferred from available for sale to held to maturity, net of amortization	9			9
Net unrealized gain (loss) on cash flow hedging derivative instruments	3,469			3,469
Comprehensive income (loss)	7,610		8,922	(1,312)
Cash dividend declared	(3,404)		(3,404)
Equity compensation expense	288	$ 288
Payment to repurchase common stock (in shares)		(8,557)
Payment to repurchase common stock	(218)		(218)
Issuance of restricted stock (in shares)		34,689
Proceeds from sale of common stock (in shares)		6,837
Proceeds from sale of common stock	$ 182	$ 182
Ending balance (in shares) at Mar. 31, 2021	10,983,258	10,983,258
Balance at end of period at Mar. 31, 2021	$ 228,184	$ 65,865	$ 163,659	$ (1,340)

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Stockholders' Equity [Abstract]
Cash dividends declared (usd per share)	$ 0.31	$ 0.30

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities
Net income	$ 8,922	$ 6,495
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	518	538
Change in deferred taxes	670	52
Provision for loan losses	525	400
Loans originated for resale	(36,199)	(11,637)
Proceeds from sales and transfers of loans	39,721	11,417
Net gain on sales of loans	(1,189)	(187)
Net gain on sale or call of securities	(119)	(752)
Net amortization of premiums on investments	662	369
Net gain on sale of other real estate owned	(98)	0
Equity compensation expense	288	150
Net (increase) decrease in other assets and accrued interest	10,917	(11,811)
Net increase (decrease) in other liabilities	(5,669)	7,729
Net loss on disposal of premises and equipment	1	0
Amortization of investment in limited partnership	77	78
Net acquisition amortization	17	11
Net cash provided by operating activities	19,044	2,852
Cash flows from investing activities
(Increase) decrease in interest-bearing deposits in other banks	(48,451)	5,263
Proceeds from sales of securities available for sale	1,214	68,620
Proceeds from maturities, payments and calls of securities available for sale	34,687	21,890
Proceeds from maturities, payments, calls and sales of securities to be held to maturity	39,195	27,275
Proceeds from sales of other real estate owned	605	0
Purchases of securities available for sale	(23,544)	(37,173)
Purchases of securities to be held to maturity	(59,047)	(87,255)
Redemption of restricted equity securities	440	0
Purchase of restricted equity securities	0	(1,012)
Net increase in loans	(40,195)	(47,351)
Capital expenditures	(3,257)	(389)
Net cash used by investing activities	(98,353)	(50,132)
Cash flows from financing activities
Net increase (decrease) in demand, savings, and money market accounts	80,201	(26,813)
Net increase in certificates of deposit	28,745	20,959
Net increase (decrease) in short-term borrowings	(32,388)	18,087
Advances on long-term borrowings	0	44,998
Repayment on long-term borrowings	(2)	0
Payment to repurchase common stock	(218)	(154)
Proceeds from sale of common stock	182	163
Dividends paid	(3,394)	(3,276)
Net cash provided by financing activities	73,126	53,964
Net increase (decrease) in cash and cash equivalents	(6,183)	6,684
Cash and cash equivalents at beginning of period	26,212	14,433
Cash and cash equivalents at end of period	20,029	21,117
Interest paid	3,447	5,777
Income taxes paid	0	0
Non-cash transactions
Net transfer from loans to other real estate owned	$ 0	$ 37

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The First Bancorp, Inc. ("the Company") is a financial holding company that owns all of the common stock of First National Bank ("the Bank"). The accompanying unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of Management, all adjustments (consisting of normally recurring accruals) considered necessary for a fair presentation have been included. All significant intercompany transactions and balances are eliminated in consolidation. The income reported for the 2021 period is not necessarily indicative of the results that may be expected for the year ending December 31, 2021. For further information, refer to the consolidated financial statements and notes included in the Company's annual report on Form 10-K for the year ended December 31, 2020. Risks and Uncertainties The impact of the coronavirus disease (COVID-19) continues to cause disruption and uncertainty in the local, national, and world economies. To curtail spread of the virus, governments at all levels encouraged social distancing and many imposed restrictions on travel and group meetings, and/or mandated shut-downs of all but essential businesses. The introduction of vaccines has led to a gradual re-opening to date and planned future re-openings. The pace of re-opening is at least partially dependent upon the distribution of vaccines, and varies across the United States. The Company’s business, financial condition and results of operations generally rely upon the ability of the Bank’s borrowers to repay their loans, the value of collateral underlying the Bank’s secured loans, and demand for loans and other products and services the Bank offers, which are highly dependent on the business environment in the Bank’s primary markets where it operates and in the United States as a whole. The Bank's primary market is the State of Maine, which relies upon tourism for a significant percentage of its economic activity. In 2020, COVID-19 adversely impacted the tourism industry to a greater degree than other industries; however, a forward-looking assessment of the continued impact cannot be completed with a high degree of certainty at this time. In addition to loans, demand for other products and services could be impacted by COVID-19. Depositors and other funding sources may be unwilling to renew certificates of deposit or other types of funding, or may only be willing to do so on terms, including higher interest rates, that are materially less favorable than the Bank has experienced in the recent past. Certain fee based activities such as service charges, interchange revenues, and wealth management were negatively impacted initially and have since largely rebounded, but could once again be negatively impacted due to lower activity or market declines related to COVID-19. Subsequent Events Events occurring subsequent to March 31, 2021, have been evaluated as to their potential impact to the financial statements.

Investment Securities

Investment Securities	3 Months Ended
	Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities The following table summarizes the amortized cost and estimated fair value of investment securities at March 31, 2021: Amortized Unrealized Gains Unrealized Losses Fair Value (Estimated) Securities available for sale U.S. Government-sponsored agencies $ 23,045,000 $ — $ (1,560,000) $ 21,485,000 Mortgage-backed securities 227,089,000 4,109,000 (3,284,000) 227,914,000 State and political subdivisions 36,663,000 1,178,000 (283,000) 37,558,000 Asset-backed securities 7,463,000 117,000 — 7,580,000 $ 294,260,000 $ 5,404,000 $ (5,127,000) $ 294,537,000 Securities to be held to maturity U.S. Government-sponsored agencies $ 35,600,000 $ 55,000 $ (2,041,000) $ 33,614,000 Mortgage-backed securities 76,365,000 480,000 (2,181,000) 74,664,000 State and political subdivisions 251,137,000 7,435,000 (525,000) 258,047,000 Corporate securities 22,250,000 347,000 (86,000) 22,511,000 $ 385,352,000 $ 8,317,000 $ (4,833,000) $ 388,836,000 Restricted equity securities Federal Home Loan Bank Stock $ 9,068,000 $ — $ — $ 9,068,000 Federal Reserve Bank Stock 1,037,000 — — 1,037,000 $ 10,105,000 $ — $ — $ 10,105,000 The following table summarizes the amortized cost and estimated fair value of investment securities at December 31, 2020: Amortized Unrealized Gains Unrealized Losses Fair Value (Estimated) Securities available for sale U.S. Government-sponsored agencies $ 23,045,000 $ — $ (315,000) $ 22,730,000 Mortgage-backed securities 238,516,000 5,507,000 (617,000) 243,406,000 State and political subdivisions 37,752,000 1,722,000 — 39,474,000 Asset-backed securities 7,723,000 43,000 — 7,766,000 $ 307,036,000 $ 7,272,000 $ (932,000) $ 313,376,000 Securities to be held to maturity U.S. Government-sponsored agencies $ 44,149,000 $ 143,000 $ (18,000) $ 44,274,000 Mortgage-backed securities 53,594,000 736,000 (195,000) 54,135,000 State and political subdivisions 245,620,000 10,427,000 (3,000) 256,044,000 Corporate securities 22,250,000 433,000 (2,000) 22,681,000 $ 365,613,000 $ 11,739,000 $ (218,000) $ 377,134,000 Restricted equity securities Federal Home Loan Bank Stock $ 9,508,000 $ — $ — $ 9,508,000 Federal Reserve Bank Stock 1,037,000 — — 1,037,000 $ 10,545,000 $ — $ — $ 10,545,000 The following table summarizes the amortized cost and estimated fair value of investment securities at March 31, 2020: Amortized Unrealized Gains Unrealized Losses Fair Value (Estimated) Securities available for sale U.S. Government-sponsored agencies $ 7,500,000 $ 52,000 $ — $ 7,552,000 Mortgage-backed securities 276,235,000 9,106,000 (189,000) 285,152,000 State and political subdivisions 19,206,000 1,018,000 — 20,224,000 $ 302,941,000 $ 10,176,000 $ (189,000) $ 312,928,000 Securities to be held to maturity U.S. Government-sponsored agencies $ 35,981,000 $ 207,000 $ — $ 36,188,000 Mortgage-backed securities 51,142,000 1,392,000 (7,000) 52,527,000 State and political subdivisions 239,719,000 5,819,000 (345,000) 245,193,000 Corporate securities 14,750,000 590,000 — 15,340,000 $ 341,592,000 $ 8,008,000 $ (352,000) $ 349,248,000 Restricted equity securities Federal Home Loan Bank Stock $ 8,957,000 $ — $ — $ 8,957,000 Federal Reserve Bank Stock 1,037,000 — — 1,037,000 $ 9,994,000 $ — $ — $ 9,994,000 The following table summarizes the contractual maturities of investment securities at March 31, 2021: Securities available for sale Securities to be held to maturity Amortized Fair Value (Estimated) Amortized Fair Value (Estimated) Due in 1 year or less $ 2,544,000 $ 2,516,000 $ 3,926,000 $ 3,956,000 Due in 1 to 5 years 12,994,000 13,172,000 26,992,000 27,613,000 Due in 5 to 10 years 50,007,000 50,587,000 173,295,000 178,069,000 Due after 10 years 228,715,000 228,262,000 181,139,000 179,198,000 $ 294,260,000 $ 294,537,000 $ 385,352,000 $ 388,836,000 The following table summarizes the contractual maturities of investment securities at December 31, 2020: Securities available for sale Securities to be held to maturity Amortized Fair Value (Estimated) Amortized Fair Value (Estimated) Due in 1 year or less $ 117,000 $ 120,000 $ 3,607,000 $ 3,641,000 Due in 1 to 5 years 17,718,000 17,915,000 30,867,000 31,792,000 Due in 5 to 10 years 49,697,000 51,001,000 183,679,000 190,153,000 Due after 10 years 239,504,000 244,340,000 147,460,000 151,548,000 $ 307,036,000 $ 313,376,000 $ 365,613,000 $ 377,134,000 The following table summarizes the contractual maturities of investment securities at March 31, 2020: Securities available for sale Securities to be held to maturity Amortized Fair Value (Estimated) Amortized Fair Value (Estimated) Due in 1 year or less $ 66,000 $ 66,000 $ 1,331,000 $ 1,337,000 Due in 1 to 5 years 25,221,000 26,159,000 27,854,000 28,361,000 Due in 5 to 10 years 62,462,000 65,032,000 184,037,000 189,214,000 Due after 10 years 215,192,000 221,671,000 128,370,000 130,336,000 $ 302,941,000 $ 312,928,000 $ 341,592,000 $ 349,248,000 At March 31, 2021, securities with a fair value of $291,990,000 were pledged to secure public deposits, repurchase agreements, and for other purposes as required by law. This compares to securities with a fair value of $297,326,000 as of December 31, 2020 and $208,376,000 at March 31, 2020, pledged for the same purposes. Gains and losses on the sale of securities are computed by subtracting the amortized cost at the time of sale from the security's selling price, net of accrued interest to be received. The following table shows securities gains and losses for the three months ended March 31, 2021 and 2020: For the three months ended March 31, 2021 2020 Proceeds from sales of securities $ 1,214,000 $ 68,620,000 Gross realized gains 119,000 1,098,000 Gross realized losses — (346,000) Net gain $ 119,000 $ 752,000 Related income taxes $ 25,000 $ 158,000 Management reviews securities with unrealized losses for other than temporary impairment. As of March 31, 2021, there were 140 securities with unrealized losses held in the Company's portfolio. These securities were temporarily impaired as a result of changes in interest rates reducing their fair value, of which 10 had been temporarily impaired for 12 months or more. The Company has the ability and intent to hold its impaired securities until a recovery of their amortized cost, which may be at maturity. Information regarding securities temporarily impaired as of March 31, 2021 is summarized below: Less than 12 months 12 months or more Total Fair Value (Estimated) Unrealized Losses Fair Value (Estimated) Unrealized Losses Fair Value (Estimated) Unrealized Losses U.S. Government-sponsored agencies $ 51,894,000 $ (3,601,000) $ — $ — $ 51,894,000 $ (3,601,000) Mortgage-backed securities 180,138,000 (5,335,000) 3,744,000 (130,000) 183,882,000 (5,465,000) State and political subdivisions 28,783,000 (808,000) — — 28,783,000 (808,000) Corporate securities 3,414,000 (86,000) — — 3,414,000 (86,000) $ 264,229,000 $ (9,830,000) $ 3,744,000 $ (130,000) $ 267,973,000 $ (9,960,000) As of December 31, 2020, there were 50 securities with unrealized losses held in the Company's portfolio. These securities were temporarily impaired as a result of changes in interest rates reducing their fair value, of which 10 had been temporarily impaired for 12 months or more. Information regarding securities temporarily impaired as of December 31, 2020 is summarized below: Less than 12 months 12 months or more Total Fair Value (Estimated) Unrealized Losses Fair Value (Estimated) Unrealized Losses Fair Value (Estimated) Unrealized Losses U.S. Government-sponsored agencies $ 30,212,000 $ (333,000) $ — $ — $ 30,212,000 $ (333,000) Mortgage-backed securities 65,505,000 (724,000) 3,878,000 (88,000) 69,383,000 (812,000) State and political subdivisions 855,000 (3,000) — — 855,000 (3,000) Corporate securities 2,498,000 (2,000) — — 2,498,000 (2,000) $ 99,070,000 $ (1,062,000) $ 3,878,000 $ (88,000) $ 102,948,000 $ (1,150,000) As of March 31, 2020, there were 70 securities with unrealized losses held in the Company's portfolio. These securities were temporarily impaired as a result of changes in interest rates reducing their fair value, of which 14 had been temporarily impaired for 12 months or more. Information regarding securities temporarily impaired as of March 31, 2020 is summarized below: Less than 12 months 12 months or more Total Fair Value (Estimated) Unrealized Losses Fair Value (Estimated) Unrealized Losses Fair Value (Estimated) Unrealized Losses Mortgage-backed securities $ 2,963,000 $ (27,000) $ 7,424,000 $ (169,000) $ 10,387,000 $ (196,000) State and political subdivisions 19,556,000 (345,000) — — 19,556,000 (345,000) $ 22,519,000 $ (372,000) $ 7,424,000 $ (169,000) $ 29,943,000 $ (541,000) During the third quarter of 2014, the Company transferred securities with a total amortized cost of $89,780,000 with a corresponding fair value of $89,757,000 from available for sale to held to maturity. The net unrealized loss, net of taxes, on these securities at the date of the transfer was $15,000. The net unrealized holding loss at the time of transfer continues to be reported in accumulated other comprehensive income (loss), net of tax and is amortized over the remaining lives of the securities as an adjustment of the yield. The amortization of the net unrealized loss reported in accumulated other comprehensive income (loss) will offset the effect on interest income of the discount for the transferred securities. The remaining unamortized balance of the net unrealized losses for the securities transferred from available for sale to held to maturity was $124,000, net of taxes, at March 31, 2021. This compares to $133,000 and $174,000, net of taxes, at December 31, 2020 and March 31, 2020, respectively. These securities were transferred as a part of the Company's overall investment and balance sheet strategies. The Bank is a member of the Federal Home Loan Bank ("FHLB") of Boston, a cooperatively owned wholesale bank for housing and finance in the six New England States. As a requirement of membership in the FHLB, the Bank must own a minimum required amount of FHLB stock, calculated periodically based primarily on its level of borrowings from the FHLB. The Bank uses the FHLB for a portion of its wholesale funding needs. As of March 31, 2021 and 2020, and December 31, 2020, the Bank's investment in FHLB stock totaled $9,068,000, $8,957,000 and $9,508,000, respectively. FHLB stock is a non-marketable equity security and therefore is reported at cost, which equals par value. The Company periodically evaluates its investment in FHLB stock for impairment based on, among other factors, the capital adequacy of the FHLB and its overall financial condition. No impairment losses have been recorded through March 31, 2021. The Company will continue to monitor its investment in FHLB stock.

Loans

Loans	3 Months Ended
	Mar. 31, 2021
Receivables [Abstract]
Loans	Loans The following table shows the composition of the Company's loan portfolio as of March 31, 2021 and 2020 and at December 31, 2020: March 31, 2021 December 31, 2020 March 31, 2020 Commercial Real estate $ 469,974,000 31.0 % $ 442,121,000 29.9 % $ 382,753,000 28.5 % Construction 53,394,000 3.5 % 56,565,000 3.8 % 43,913,000 3.3 % Other 297,488,000 19.6 % 285,015,000 19.3 % 237,896,000 17.7 % Municipal 49,476,000 3.3 % 43,783,000 3.0 % 43,537,000 3.2 % Residential Term 520,317,000 34.3 % 522,070,000 35.3 % 500,971,000 37.3 % Construction 24,796,000 1.6 % 21,600,000 1.5 % 15,202,000 1.1 % Home equity line of credit 77,210,000 5.1 % 79,750,000 5.4 % 90,674,000 6.7 % Consumer 24,117,000 1.6 % 25,857,000 1.8 % 29,262,000 2.2 % Total $ 1,516,772,000 100.0 % $ 1,476,761,000 100.0 % $ 1,344,208,000 100.0 % Loan balances include net deferred loan costs of $5,328,000 as of March 31, 2021, $6,931,000 as of December 31, 2020, and $7,551,000 as of March 31, 2020. The decrease in net deferred loan costs year-over-year and year-to-date is attributable to unearned fees and deferred costs associated with PPP loans originated during 2020 and the first quarter 2021. Pursuant to collateral agreements, qualifying first mortgage loans and commercial real estate loans, which totaled $362,271,000 at March 31, 2021, were used to collateralize borrowings from the FHLB. This compares to qualifying loans which totaled $378,183,000 at December 31, 2020, and $401,555,000 at March 31, 2020. In addition, commercial, construction and home equity loans totaling $275,993,000 at March 31, 2021, $259,599,000 at December 31, 2020, and $260,703,000 at March 31, 2020, were used to collateralize a standby line of credit at the Federal Reserve Bank of Boston. For all loan classes, loans over 30 days past due are considered delinquent. Information on the past-due status of loans by class of financing receivable as of March 31, 2021, is presented in the following table: 30-59 Days 60-89 Days 90+ Days All Current Total 90+ Days Commercial Real estate $ 186,000 $ — $ 283,000 $ 469,000 $ 469,505,000 $ 469,974,000 $ — Construction 47,000 — 80,000 127,000 53,267,000 53,394,000 — Other 696,000 11,000 628,000 1,335,000 296,153,000 297,488,000 9,000 Municipal — — — — 49,476,000 49,476,000 — Residential Term 1,183,000 148,000 958,000 2,289,000 518,028,000 520,317,000 71,000 Construction 111,000 — — 111,000 24,685,000 24,796,000 — Home equity line of credit 547,000 45,000 408,000 1,000,000 76,210,000 77,210,000 — Consumer 284,000 2,000 5,000 291,000 23,826,000 24,117,000 5,000 Total $ 3,054,000 $ 206,000 $ 2,362,000 $ 5,622,000 $ 1,511,150,000 $ 1,516,772,000 $ 85,000 On March 22, 2020, banking regulators issued an Interagency Statement on Loan Modifications and Reporting in response to the onset of COVID-19; shortly thereafter, on March 30, 2020, the Coronavirus Aid, Relief, and Economic Security (CARES) Act was passed. Both the Interagency Statement and the CARES Act provided an exemption for qualified modifications from Troubled Debt Restructure (TDR) designation, which was extended by the Coronavirus Preparedness and Response Supplemental Appropriations Act, 2020. The Company actively worked with borrowers impacted by the COVID-19 outbreak and as of March 31, 2021, a total of 1037 loan modification requests for interest-only payments or deferred payments had been completed in conformance with the Interagency Statement or CARES Act, representing $292,003,000 in loan balances, or approximately 20.0% of the loan portfolio excluding PPP balances. One of these modifications of de minimis amount has been classified as a Troubled Debt Restructure since being modified. So long as modified terms are met, loans in an active modification are not included in past due loan totals and continue to accrue interest. As of March 31, 2021, loans totaling $50.6 million, or 3.3% of all loans, remained in either their original modification or a subsequent modification. Modification statuses by portfolio segment are summarized below: Commercial/Municipal Loan Modifications Units Percentage Balance Percentage Paid Off 90 15.0 % $ 14,002,000 6.0 % Subsequent Modification 30 5.0 % 30,435,000 13.0 % Still in Original Modification 11 2.0 % 1,595,000 1.0 % Out of Modification 475 78.0 % 193,212,000 80.0 % Total 606 100.0 % $ 239,244,000 100.0 % Residential Real Estate Modifications Units Percentage Balance Percentage Paid Off 41 11.0 % $ 8,269,000 16.0 % Subsequent Modification 136 38.0 % 16,595,000 32.0 % Still in Original Modification 16 4.0 % 1,853,000 4.0 % Out of Modification 170 47.0 % 24,960,000 48.0 % Total 363 100.0 % $ 51,677,000 100.0 % Consumer Loan Modifications Units Percentage Balance Percentage Paid Off 17 25.0 % $ 129,000 12.0 % Subsequent Modification 2 3.0 % 62,000 6.0 % Still in Original Modification 2 3.0 % 27,000 2.0 % Out of Modification 47 69.0 % 864,000 80.0 % Total 68 100.0 % $ 1,082,000 100.0 % Information on the past-due status of loans by class of financing receivable as of December 31, 2020, is presented in the following table: 30-59 Days 60-89 Days 90+ Days All Current Total 90+ Days Commercial Real estate $ 139,000 $ 190,000 $ 226,000 $ 555,000 $ 441,566,000 $ 442,121,000 $ — Construction 13,000 — 80,000 93,000 56,472,000 56,565,000 — Other 490,000 62,000 2,082,000 2,634,000 282,381,000 285,015,000 1,464,000 Municipal — — — — 43,783,000 43,783,000 — Residential Term 540,000 1,799,000 1,616,000 3,955,000 518,115,000 522,070,000 23,000 Construction — — — — 21,600,000 21,600,000 — Home equity line of credit 1,645,000 324,000 367,000 2,336,000 77,414,000 79,750,000 — Consumer 89,000 42,000 18,000 149,000 25,708,000 25,857,000 18,000 Total $ 2,916,000 $ 2,417,000 $ 4,389,000 $ 9,722,000 $ 1,467,039,000 $ 1,476,761,000 $ 1,505,000 Information on the past-due status of loans by class of financing receivable as of March 31, 2020, is presented in the following table: 30-59 Days 60-89 Days 90+ Days All Current Total 90+ Days Commercial Real estate $ 2,935,000 $ 2,000 $ 1,297,000 $ 4,234,000 $ 378,519,000 $ 382,753,000 $ 22,000 Construction 59,000 — 246,000 305,000 43,608,000 43,913,000 — Other 1,678,000 295,000 3,895,000 5,868,000 232,028,000 237,896,000 3,536,000 Municipal — — — — 43,537,000 43,537,000 — Residential Term 4,270,000 171,000 3,320,000 7,761,000 493,210,000 500,971,000 192,000 Construction — — — — 15,202,000 15,202,000 — Home equity line of credit 1,566,000 264,000 1,481,000 3,311,000 87,363,000 90,674,000 — Consumer 250,000 18,000 82,000 350,000 28,912,000 29,262,000 20,000 Total $ 10,758,000 $ 750,000 $ 10,321,000 $ 21,829,000 $ 1,322,379,000 $ 1,344,208,000 $ 3,770,000 For all classes, loans are placed on non-accrual status when, based on current information and events, it is probable that the Company will be unable to collect all amounts due according to the contractual terms of the loan agreement or when principal and interest is 90 days or more past due unless the loan is both well secured and in the process of collection (in which case the loan may continue to accrue interest in spite of its past due status). A loan is "well secured" if it is secured (1) by collateral in the form of liens on or pledges of real or personal property, including securities, that have a realizable value sufficient to discharge the debt (including accrued interest) in full, or (2) by the guarantee of a financially responsible party. A loan is "in the process of collection" if collection of the loan is proceeding in due course either (1) through legal action, including judgment enforcement procedures, or, (2) in appropriate circumstances, through collection efforts not involving legal action which are reasonably expected to result in repayment of the debt or in its restoration to a current status in the near future. Cash payments received on non-accrual loans, which are included in impaired loans, are applied to reduce the loan's principal balance until the remaining principal balance is deemed collectible, after which interest is recognized when collected. As a general rule, a loan may be restored to accrual status when payments are current for a substantial period of time, generally six months, and repayment of the remaining contractual amounts is expected, or when it otherwise becomes well secured and in the process of collection. Information on nonaccrual loans as of March 31, 2021 and 2020 and at December 31, 2020 is presented in the following table: March 31, 2021 December 31, 2020 March 31, 2020 Commercial Real estate $ 748,000 $ 543,000 $ 1,748,000 Construction 89,000 89,000 246,000 Other 1,675,000 1,481,000 457,000 Municipal — — — Residential Term 3,577,000 3,593,000 5,615,000 Construction — — — Home equity line of credit 852,000 1,015,000 1,916,000 Consumer — — 66,000 Total $ 6,941,000 $ 6,721,000 $ 10,048,000 Impaired loans include TDR loans and loans placed on non-accrual. These loans are measured at the present value of expected future cash flows discounted at the loan's effective interest rate or at the fair value of the collateral if the loan is collateral dependent. If the measure of an impaired loan is lower than the recorded investment in the loan and estimated selling costs, a specific reserve is established for the difference, or, in certain situations, if the measure of an impaired loan is lower than the recorded investment in the loan and estimated selling costs, the difference is written off. A breakdown of impaired loans by class of financing receivable as of and for the period ended March 31, 2021 is presented in the following table: For the three months ended March 31, 2021 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Recognized Interest Income With No Related Allowance Commercial Real estate $ 2,223,000 $ 2,550,000 $ — $ 2,179,000 $ 17,000 Construction 89,000 89,000 — 89,000 — Other 1,593,000 1,650,000 — 1,654,000 5,000 Municipal — — — — — Residential Term 7,183,000 8,416,000 — 7,184,000 35,000 Construction — — — — — Home equity line of credit 852,000 928,000 — 872,000 — Consumer 7,000 7,000 — 7,000 — $ 11,947,000 $ 13,640,000 $ — $ 11,985,000 $ 57,000 With an Allowance Recorded Commercial Real estate $ 978,000 $ 1,013,000 $ 174,000 $ 968,000 $ 9,000 Construction 681,000 681,000 21,000 681,000 6,000 Other 627,000 643,000 563,000 525,000 — Municipal — — — — — Residential Term 2,084,000 2,113,000 142,000 1,957,000 16,000 Construction — — — — — Home equity line of credit 23,000 23,000 — 8,000 — Consumer — — — — — $ 4,393,000 $ 4,473,000 $ 900,000 $ 4,139,000 $ 31,000 Total Commercial Real estate $ 3,201,000 $ 3,563,000 $ 174,000 $ 3,147,000 $ 26,000 Construction 770,000 770,000 21,000 770,000 6,000 Other 2,220,000 2,293,000 563,000 2,179,000 5,000 Municipal — — — — — Residential Term 9,267,000 10,529,000 142,000 9,141,000 51,000 Construction — — — — — Home equity line of credit 875,000 951,000 — 880,000 — Consumer 7,000 7,000 — 7,000 — $ 16,340,000 $ 18,113,000 $ 900,000 $ 16,124,000 $ 88,000 Substantially all interest income recognized on impaired loans for all classes of financing receivables was recognized on a cash basis as received. A breakdown of impaired loans by class of financing receivable as of and for the year ended December 31, 2020 is presented in the following table: Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Recognized Interest Income With No Related Allowance Commercial Real estate $ 2,060,000 $ 2,368,000 $ — $ 4,123,000 $ 127,000 Construction 89,000 89,000 — 358,000 — Other 1,591,000 1,623,000 — 999,000 15,000 Municipal — — — — — Residential Term 7,335,000 8,629,000 — 8,773,000 193,000 Construction — — — — — Home equity line of credit 1,015,000 1,089,000 — 1,219,000 — Consumer 8,000 8,000 — 1,000 1,000 $ 12,098,000 $ 13,806,000 $ — $ 15,473,000 $ 336,000 With an Allowance Recorded Commercial Real estate $ 969,000 $ 995,000 $ 112,000 $ 1,018,000 $ 43,000 Construction 681,000 681,000 18,000 579,000 30,000 Other 188,000 202,000 169,000 1,193,000 3,000 Municipal — — — — — Residential Term 2,079,000 2,134,000 163,000 2,073,000 65,000 Construction — — — — — Home equity line of credit 24,000 24,000 — 744,000 1,000 Consumer — — — 8,000 — $ 3,941,000 $ 4,036,000 $ 462,000 $ 5,615,000 $ 142,000 Total Commercial Real estate $ 3,029,000 $ 3,363,000 $ 112,000 $ 5,141,000 $ 170,000 Construction 770,000 770,000 18,000 937,000 30,000 Other 1,779,000 1,825,000 169,000 2,192,000 18,000 Municipal — — — — — Residential Term 9,414,000 10,763,000 163,000 10,846,000 258,000 Construction — — — — — Home equity line of credit 1,039,000 1,113,000 — 1,963,000 1,000 Consumer 8,000 8,000 — 9,000 1,000 $ 16,039,000 $ 17,842,000 $ 462,000 $ 21,088,000 $ 478,000 A breakdown of impaired loans by class of financing receivable as of and for the period ended March 31, 2020 is presented in the following table: For the three months ended March 31, 2020 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Recognized Interest Income With No Related Allowance Commercial Real estate $ 5,162,000 $ 5,421,000 $ — $ 5,157,000 $ 47,000 Construction 246,000 265,000 — 717,000 — Other 818,000 848,000 — 793,000 3,000 Municipal — — — — — Residential Term 10,378,000 12,135,000 — 10,015,000 67,000 Construction — — — — — Home equity line of credit 1,232,000 1,306,000 — 1,185,000 4,000 Consumer — — — — — $ 17,836,000 $ 19,975,000 $ — $ 17,867,000 $ 121,000 With an Allowance Recorded Commercial Real estate $ 1,061,000 $ 1,082,000 $ 230,000 $ 1,064,000 $ 8,000 Construction 701,000 701,000 3,000 234,000 10,000 Other 172,000 194,000 172,000 4,269,000 — Municipal — — — — — Residential Term 1,660,000 1,755,000 233,000 1,999,000 13,000 Construction — — — — — Home equity line of credit 996,000 1,002,000 296,000 1,124,000 — Consumer 67,000 67,000 58,000 26,000 — $ 4,657,000 $ 4,801,000 $ 992,000 $ 8,716,000 $ 31,000 Total Commercial Real estate $ 6,223,000 $ 6,503,000 $ 230,000 $ 6,221,000 $ 55,000 Construction 947,000 966,000 3,000 951,000 10,000 Other 990,000 1,042,000 172,000 5,062,000 3,000 Municipal — — — — — Residential Term 12,038,000 13,890,000 233,000 12,014,000 80,000 Construction — — — — — Home equity line of credit 2,228,000 2,308,000 296,000 2,309,000 4,000 Consumer 67,000 67,000 58,000 26,000 — $ 22,493,000 $ 24,776,000 $ 992,000 $ 26,583,000 $ 152,000 Troubled Debt Restructured A "TDR" constitutes a restructuring of debt if the Company, for economic or legal reasons related to the borrower's financial difficulties, grants a concession to the borrower that it would not otherwise consider. To determine whether or not a loan should be classified as a TDR, Management evaluates a loan based upon the following criteria: • The borrower demonstrates financial difficulty; common indicators include past due status with bank obligations, substandard credit bureau reports, or an inability to refinance with another lender, and • The Company has granted a concession; common concession types include maturity date extension, interest rate adjustments to below market pricing, and deferment of payments. As of March 31, 2021, the Company had 73 loans with a balance of $11,306,000 that have been classified as TDRs. This compares to 74 loans with a balance of $11,534,000 and 81 loans with a balance of $14,968,000 classified as TDRs as of December 31, 2020 and March 31, 2020, respectively. The impairment carried as a specific reserve in the allowance for loan losses is calculated by present valuing the expected cash flows on the loan at the original interest rate, or, for collateral-dependent loans, using the fair value of the collateral less costs to sell. The following table shows TDRs by class and the specific reserve as of March 31, 2021: Number of Loans Balance Specific Reserves Commercial Real estate 13 $ 2,525,000 $ 174,000 Construction 1 681,000 21,000 Other 7 964,000 358,000 Municipal — — — Residential Term 49 6,947,000 142,000 Construction — — — Home equity line of credit 2 182,000 — Consumer 1 7,000 — 73 $ 11,306,000 $ 695,000 The following table shows TDRs by class and the specific reserve as of December 31, 2020: Number of Loans Balance Specific Reserves Commercial Real estate 13 $ 2,558,000 $ 106,000 Construction 1 681,000 18,000 Other 6 717,000 96,000 Municipal — — — Residential Term 51 7,384,000 149,000 Construction — — — Home equity line of credit 2 186,000 — Consumer 1 8,000 — 74 $ 11,534,000 $ 369,000 The following table shows TDRs by class and the specific reserve as of March 31, 2020: Number of Loans Balance Specific Reserves Commercial Real estate 16 $ 4,688,000 $ 225,000 Construction 1 701,000 3,000 Other 7 779,000 131,000 Municipal — — — Residential Term 54 8,321,000 197,000 Construction — — — Home equity line of credit 3 479,000 — Consumer — — — 81 $ 14,968,000 $ 556,000 As of March 31, 2021, 11 of the loans classified as TDRs with a total balance of $1,017,000 were more than 30 days past due. Of these loans, none had been placed on TDR status in the previous 12 months. The following table shows these TDRs by class and the associated specific reserves included in the allowance for loan losses as of March 31, 2021: Number of Loans Balance Specific Reserves Commercial Real estate 2 $ 72,000 $ 72,000 Construction — — — Other 4 419,000 92,000 Municipal — — — Residential Term 4 366,000 — Construction — — — Home equity line of credit 1 160,000 — Consumer — — — 11 $ 1,017,000 $ 164,000 As of March 31, 2020, 22 of the loans classified as TDRs with a total balance of $3,622,000 were more than 30 days past due. Of these loans, one had been placed on TDR status in the previous 12 months. The following table shows these TDRs by class and the associated specific reserves included in the allowance for loan losses as of March 31, 2020: Number of Loans Balance Specific Reserves Commercial Real estate 2 $ 618,000 $ — Construction — — — Other 4 540,000 131,000 Municipal — — — Residential Term 15 2,297,000 24,000 Construction — — — Home equity line of credit 1 167,000 — Consumer — — — 22 $ 3,622,000 $ 155,000 For the three months ended March 31, 2021, one loan was placed on TDR status. The following table shows this TDR, by class and the associated specific reserve included in the allowance for loan losses as of March 31, 2021: Number of Loans Pre-Modification Post-Modification Outstanding Specific Reserves Commercial Real estate — $ — $ — $ — Construction — — — — Other 1 262,000 262,000 262,000 Municipal — — — — Residential Term — — — — Construction — — — — Home equity line of credit — — — — Consumer — — — — 1 $ 262,000 $ 262,000 $ 262,000 For the three months ended March 31, 2020, two loans were placed on TDR status. The following table shows these TDRs by class and associated specific reserves included in the allowance for loan losses as of March 31, 2020: Number of Loans Pre-Modification Post-Modification Outstanding Specific Reserves Commercial Real estate — $ — $ — $ — Construction — — — — Other — — — — Municipal — — — — Residential Term 2 235,000 190,000 — Construction — — — — Home equity line of credit — — — — Consumer — — — — 2 $ 235,000 $ 190,000 $ — As of March 31, 2021, Management is aware of six loans classified as TDRs that are involved in bankruptcy with an outstanding balance of $708,000. There were also 21 loans with an outstanding balance of $1,908,000 that were classified as TDRs and on non-accrual status, of which one loan with an outstanding balance of $92,000 was in the process of foreclosure. Residential Mortgage Loans in Process of Foreclosure As of March 31, 2021, there were 14 mortgage loans collateralized by residential real estate in the process of foreclosure with a total balance of $1,067,000. This compares to 15 mortgage loans collateralized by residential real estate in the process of foreclosure with a total balance of $2,284,000 as of March 31, 2020.

Allowance for Loan Losses

Allowance for Loan Losses	3 Months Ended
	Mar. 31, 2021
Receivables [Abstract]
Allowance for Loan Losses	Allowance for Loan Losses The Company provides for loan losses through the establishment of an allowance for loan losses which represents an estimated reserve for existing losses in the loan portfolio. A systematic methodology is used for determining the allowance that includes a quarterly review process, risk rating changes, and adjustments to the allowance. The loan portfolio is classified in eight classes and credit risk is evaluated separately in each class. Major risk characteristics relevant to each portfolio segment are as follows: Commercial Real Estate - Commercial real estate loans are impacted by factors such as competitive market forces, vacancy rates, cap rates, net operating incomes, lease renewals and overall economic demand. In addition, loans in the recreational and tourism sector can be affected by weather conditions, such as unseasonably low winter snowfalls. Commercial real estate lending also carries a higher degree of environmental risk than other real estate lending. Commercial Construction - Commercial construction loans are impacted by factors similar to those for commercial real estate loans in addition to risks related to contractor financial capacity and ability to complete a project within acceptable time frames and within budget. Commercial Other - A weakened economy, soft consumer spending, and the rising cost of labor or raw materials are examples of issues that can impact the credit quality in this segment. Municipal Loans - The overall health of the economy, including unemployment rates and housing prices, has an impact on the credit quality of this segment. Residential Real Estate Term - The overall health of the economy, including unemployment rates and housing prices, has an impact on the credit quality of this segment. Residential Real Estate Construction - Residential construction loans are impacted by factors similar to those for residential real estate term loans in addition to risks related to contractor financial capacity and ability to complete a project within acceptable time frames and within budget. Home Equity Line of Credit - The overall health of the economy, including unemployment rates and housing prices, has an impact on the credit quality of this segment. Consumer - The overall health of the economy, including unemployment rates, has an impact on the credit quality of this segment. The appropriate level of the allowance is evaluated continually based on a review of significant loans, with a particular emphasis on nonaccruing, past due, and other loans that may require special attention. Other factors include general conditions in local and national economies; loan portfolio composition and asset quality indicators; and internal factors such as changes in underwriting policies, credit administration practices, experience, ability and depth of lending management, among others. The allowance consists of four elements: (1) specific reserves for loans evaluated individually for impairment; (2) general reserves for each portfolio segment based on historical loan loss experience, (3) qualitative reserves judgmentally adjusted for local and national economic conditions, concentrations, portfolio composition, volume and severity of delinquencies and nonaccrual loans, trends of criticized and classified loans, changes in credit policies and underwriting standards, credit administration practices, and other factors as applicable for each portfolio segment; and (4) unallocated reserves. All outstanding loans are considered in evaluating the appropriateness of the allowance. A breakdown of the allowance for loan losses as of March 31, 2021, December 31, 2020, and March 31, 2020, by class of financing receivable and allowance element, is presented in the following tables: As of March 31, 2021 Specific Reserves on Loans Evaluated Individually for Impairment General Reserves on Loans Based on Historical Loss Experience Reserves for Qualitative Factors Unallocated Total Reserves Commercial Real estate $ 174,000 $ 797,000 $ 4,770,000 $ — $ 5,741,000 Construction 21,000 90,000 538,000 — 649,000 Other 563,000 503,000 3,014,000 — 4,080,000 Municipal — — 185,000 — 185,000 Residential Term 142,000 259,000 2,561,000 — 2,962,000 Construction — 12,000 119,000 — 131,000 Home equity line of credit — 130,000 817,000 — 947,000 Consumer — 285,000 587,000 — 872,000 Unallocated — — — 1,027,000 1,027,000 $ 900,000 $ 2,076,000 $ 12,591,000 $ 1,027,000 $ 16,594,000 As of December 31, 2020 Specific Reserves on Loans Evaluated Individually for Impairment General Reserves on Loans Based on Historical Loss Experience Reserves for Qualitative Factors Unallocated Total Reserves Commercial Real estate $ 112,000 $ 721,000 $ 4,345,000 $ — $ 5,178,000 Construction 18,000 92,000 552,000 — 662,000 Other 169,000 465,000 2,804,000 — 3,438,000 Municipal — — 171,000 — 171,000 Residential Term 163,000 145,000 2,271,000 — 2,579,000 Construction — 6,000 96,000 — 102,000 Home equity line of credit — 151,000 1,060,000 — 1,211,000 Consumer — 282,000 496,000 — 778,000 Unallocated — — — 2,134,000 2,134,000 $ 462,000 $ 1,862,000 $ 11,795,000 $ 2,134,000 $ 16,253,000 As of March 31, 2020 Specific Reserves on Loans Evaluated Individually for Impairment General Reserves on Loans Based on Historical Loss Experience Reserves for Qualitative Factors Unallocated Total Reserves Commercial Real estate $ 230,000 $ 687,000 $ 2,945,000 $ — $ 3,862,000 Construction 3,000 80,000 341,000 — 424,000 Other 172,000 426,000 1,829,000 — 2,427,000 Municipal — — 29,000 — 29,000 Residential Term 233,000 300,000 693,000 — 1,226,000 Construction — 10,000 22,000 — 32,000 Home equity line of credit 296,000 168,000 548,000 — 1,012,000 Consumer 58,000 228,000 439,000 — 725,000 Unallocated — — — 2,121,000 2,121,000 $ 992,000 $ 1,899,000 $ 6,846,000 $ 2,121,000 $ 11,858,000 Qualitative adjustment factors are taken into consideration when determining reserve estimates. These adjustment factors are based upon Management's evaluation of various current conditions, including those listed below. • General economic conditions. • Credit quality trends with emphasis on loan delinquencies, nonaccrual levels and classified loans. • Recent loss experience in particular segments of the portfolio. • Loan volumes and concentrations, including changes in mix. • Other factors, including changes in quality of the loan origination; loan policy changes; changes in credit risk management processes; Bank regulatory and external loan review examination results. Qualitative factors applied to the portfolio or segments of the portfolio may include judgments concerning general economic conditions that may affect credit quality, credit concentrations, the pace of portfolio growth, the direction of risk rating movements, policy exception levels, and delinquency levels; these qualitative factors are also considered in connection with the unallocated portion of our allowance for loan losses. The qualitative portion of the allowance for loan losses was 0.83% of related loans as of March 31, 2021, compared to 0.80% of related loans as of December 31, 2020. The qualitative portion increased $796,000 between December 31, 2020 and March 31, 2021 due to a mix of factors. These factors included changes in various macroeconomic measures used in the qualitative model, updated analysis of the loan portfolio in multiple stress scenarios, and performance of COVID-19 related loan modifications. The unallocated component of the allowance totaled $1,027,000 at March 31, 2021, or 6.2% of the total reserve. This compares to $2,134,000 or 13.1% as of December 31, 2020. Maintenance of an unallocated component reflects general imprecision related to portfolio growth along with lingering uncertainty regarding the potential impacts of COVID-19 on the loan portfolio. The allowance for loan losses as a percent of total loans stood at 1.09% as of March 31, 2021, 1.10% at December 31, 2020 and 0.88% as of March 31, 2020. Commercial loans are comprised of three major classes, commercial real estate loans, commercial construction loans and other commercial loans. Commercial real estate loans consist of mortgage loans to finance investments in real property such as multi-family residential, commercial/retail, office, industrial, hotels, educational and other specific or mixed use properties. Commercial real estate loans are typically written with amortizing payment structures. Collateral values are determined based on appraisals and evaluations in accordance with established policy and regulatory guidelines. Commercial real estate loans typically have a loan-to-value ratio of up to 80% based upon current valuation information at the time the loan is made. Commercial real estate loans are primarily paid by the cash flow generated from the real property, such as operating leases, rents, or other operating cash flows from the borrower. Commercial construction loans consist of loans to finance construction in a mix of owner- and non-owner occupied commercial real estate properties. Commercial construction loans typically have maturities of less than two years. Payment structures during the construction period are typically on an interest only basis, although principal payments may be established depending on the type of construction project being financed. During the construction phase, commercial construction loans are primarily paid by cash flow generated from the construction project or other operating cash flows from the borrower or guarantors, if applicable. At the end of the construction period, loan repayment typically comes from a third party source in the event that the Company will not be providing permanent term financing. Collateral valuation and loan-to-value guidelines follow those for commercial real estate loans. Other commercial loans consist of revolving and term loan obligations extended to business and corporate enterprises for the purpose of financing working capital and or capital investment. Collateral generally consists of pledges of business assets including, but not limited to, accounts receivable, inventory, plant and equipment, and/or real estate, if applicable. Commercial loans are primarily paid by the operating cash flow of the borrower. Commercial loans may be secured or unsecured. Other commercial loans also include loans made under the SBA PPP. These loans are unsecured and carry a 100% guarantee from the SBA. Municipal loans are comprised of loans to municipalities in Maine for capitalized expenditures, construction projects or tax anticipation notes. All municipal loans are considered general obligations of the municipality and are collateralized by the taxing ability of the municipality for repayment of debt. Residential loans are comprised of two classes: term loans and construction loans. Residential term loans consist of residential real estate loans held in the Company's loan portfolio made to borrowers who demonstrate the ability to make scheduled payments with full consideration to underwriting factors. Borrower qualifications include favorable credit history combined with supportive income requirements and loan-to-value ratios within established policy and regulatory guidelines. Collateral values are determined based on appraisals and evaluations in accordance with established policy and regulatory guidelines. Residential loans typically have a loan-to-value ratio of up to 80% based on appraisal information at the time the loan is made. Collateral consists of mortgage liens on one- to four-family residential properties. Loans are offered with fixed or adjustable rates with amortization terms of up to thirty years. Residential construction loans typically consist of loans for the purpose of constructing single family residences to be owned and occupied by the borrower. Borrower qualifications include favorable credit history combined with supportive income requirements and loan-to-value ratios within established policy and regulatory guidelines. Residential construction loans normally have construction terms of one year or less and payment during the construction term is typically on an interest only basis from sources including interest reserves, borrower liquidity and/or income. Residential construction loans will typically convert to permanent financing from the Company or have another financing commitment in place from an acceptable mortgage lender. Collateral valuation and loan-to-value guidelines are consistent with those for residential term loans. Home equity lines of credit are made to qualified individuals and are secured by senior or junior mortgage liens on owner occupied one- to four-family homes, condominiums, or vacation homes. The home equity line of credit typically has a variable interest rate and is billed as interest-only payments during the draw period. At the end of the draw period, the home equity line of credit is billed as a percentage of the principal balance plus all accrued interest. Loan maturities are normally 300 months. Borrower qualifications include favorable credit history combined with supportive income requirements and combined loan-to- value ratios usually not exceeding 80% inclusive of priority liens. Collateral valuation guidelines follow those for residential real estate loans. Consumer loan products including personal lines of credit and amortizing loans made to qualified individuals for various purposes such as auto, recreational vehicles, debt consolidation, personal expenses or overdraft protection. Borrower qualifications include favorable credit history combined with supportive income and collateral requirements within established policy guidelines. Consumer loans may be secured or unsecured. Construction, land and land development loans, both commercial and residential, comprise a small portion of the portfolio, and at 36.6% of capital are below the regulatory guidance limit of 100.0% of capital at March 31, 2021. Construction loans and non-owner-occupied commercial real estate loans are at 155.2% of total capital, below the regulatory limit of 300.0% of capital at March 31, 2021. The process of establishing the allowance with respect to the commercial loan portfolio begins when a Loan Officer or Senior Officer (or designate) initially assigns each loan a risk rating, using established credit criteria. Approximately 60% of a trailing four quarter average gross commercial portfolio is subject to review and validation annually by an independent consulting firm. Additionally, commercial loan relationships with exposure greater than or equal to $500,000 are subject to review annually by the Company's internal credit review function. The methodology employs Management's judgment as to the level of losses on existing loans based on internal review of the loan portfolio, including an analysis of a borrower's current financial position, and the consideration of current and anticipated economic conditions and their potential effects on specific borrowers and or lines of business. In determining the Company's ability to collect certain loans, Management also considers the fair value of underlying collateral. The risk rating system has eight levels, defined as follows: 1 Strong Credits rated "1" are characterized by borrowers fully responsible for the credit with excellent capacity to pay principal and interest. Loans rated "1" may be secured with acceptable forms of liquid collateral. 2 Above Average Credits rated "2" are characterized by borrowers that have better than average liquidity, capitalization, earnings and/or cash flow with a consistent record of solid financial performance. 3 Satisfactory Credits rated "3" are characterized by borrowers with favorable liquidity, profitability and financial condition with adequate cash flow to pay debt service. 4 Average Credits rated "4" are characterized by borrowers that present risk more than 1, 2 and 3 rated loans and merit an ordinary level of ongoing monitoring. Financial condition is on par or somewhat below industry averages while cash flow is generally adequate to meet debt service requirements. 5 Watch Credits rated "5" are characterized by borrowers that warrant greater monitoring due to financial condition or unresolved and identified risk factors. 6 Other Assets Especially Mentioned (OAEM) Loans in this category are currently protected but are potentially weak and constitute an undue and unwarranted credit risk, but not to the point of justifying a classification of substandard. OAEM have potential weaknesses which may, if not checked or corrected, weaken the asset or inadequately protect the Company's credit position at some future date. 7 Substandard Loans in this category are inadequately protected by the paying capacity of the borrower or of the collateral pledged, if any. Loans so classified have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. Substandard loans are characterized by the distinct possibility that the Company may sustain some loss if the deficiencies are not corrected. 8 Doubtful Loans classified "Doubtful" have the same weaknesses as those classified substandard with the added characteristic that the weaknesses make collection or liquidation in full, based on currently existing facts, conditions, and values, highly questionable and improbable. The possibility of loss is high, but because of certain important and reasonably specific pending factors which may work to the advantage and strengthening of the asset, its classification as an estimated loss is deferred until its more exact status may be determined. The following table summarizes the risk ratings for the Company's commercial real estate, commercial construction, commercial other, and municipal loans as of March 31, 2021: Commercial Commercial Commercial Municipal All Risk- 1 Strong $ — $ — $ 1,716,000 $ 16,000 $ 1,732,000 2 Above Average 7,663,000 187,000 4,560,000 47,632,000 60,042,000 3 Satisfactory 94,014,000 2,837,000 107,116,000 367,000 204,334,000 4 Average 279,879,000 37,779,000 128,120,000 1,461,000 447,239,000 5 Watch 77,299,000 12,375,000 49,186,000 — 138,860,000 6 OAEM 2,261,000 — 65,000 — 2,326,000 7 Substandard 8,858,000 216,000 6,725,000 — 15,799,000 8 Doubtful — — — — — Total $ 469,974,000 $ 53,394,000 $ 297,488,000 $ 49,476,000 $ 870,332,000 The following table summarizes the risk ratings for the Company's commercial real estate, commercial construction, commercial other, and municipal loans as of December 31, 2020: Commercial Commercial Commercial Municipal All Risk- 1 Strong $ — $ — $ 2,402,000 $ 19,000 $ 2,421,000 2 Above Average 5,938,000 2,343,000 6,326,000 41,939,000 56,546,000 3 Satisfactory 91,475,000 2,889,000 104,432,000 369,000 199,165,000 4 Average 261,539,000 31,221,000 120,570,000 1,456,000 414,786,000 5 Watch 72,840,000 19,893,000 44,293,000 — 137,026,000 6 OAEM 2,754,000 — 234,000 — 2,988,000 7 Substandard 7,575,000 219,000 6,758,000 — 14,552,000 8 Doubtful — — — — — Total $ 442,121,000 $ 56,565,000 $ 285,015,000 $ 43,783,000 $ 827,484,000 The following table summarizes the risk ratings for the Company's commercial real estate, commercial construction, commercial other, and municipal loans as of March 31, 2020: Commercial Commercial Commercial Municipal All Risk- 1 Strong $ — $ — $ 4,559,000 $ 28,000 $ 4,587,000 2 Above Average 10,222,000 842,000 5,933,000 40,340,000 57,337,000 3 Satisfactory 83,905,000 1,873,000 40,255,000 372,000 126,405,000 4 Average 203,263,000 26,029,000 131,664,000 2,797,000 363,753,000 5 Watch 68,618,000 14,702,000 46,357,000 — 129,677,000 6 OAEM 1,834,000 — 2,824,000 — 4,658,000 7 Substandard 14,911,000 467,000 6,304,000 — 21,682,000 8 Doubtful — — — — — Total $ 382,753,000 $ 43,913,000 $ 237,896,000 $ 43,537,000 $ 708,099,000 Commercial loans are generally charged off when all or a portion of the principal amount is determined to be uncollectible. This determination is based on circumstances specific to a borrower including repayment ability, analysis of collateral and other factors as applicable. Residential loans are comprised of two classes: term loans, which include traditional amortizing home mortgages, and construction loans, which include loans for owner-occupied residential construction. Residential loans typically have a 75% to 80% loan to value based upon current appraisal information at the time the loan is made. Home equity loans and lines of credit are typically written to the same underwriting standards. Consumer loans are primarily amortizing loans to individuals collateralized by automobiles, pleasure craft and recreation vehicles, typically with a maximum loan to value of 80% to 90% of the purchase price of the collateral. Consumer loans also include a small amount of unsecured short-term time notes to individuals. Residential loans, consumer loans and home equity lines of credit are segregated into homogeneous pools with similar risk characteristics. Trends and current conditions are analyzed and historical loss experience is adjusted accordingly. Quantitative and qualitative adjustment factors for these segments are consistent with those for the commercial and municipal classes. Certain loans in the residential, home equity lines of credit and consumer classes identified as having the potential for further deterioration are analyzed individually to confirm impairment status, and to determine the need for a specific reserve; however there is no formal rating system used for these classes. Consumer loans greater than 120 days past due are generally charged off. Residential loans 90 days or more past due are placed on non-accrual status unless the loans are both well secured and in the process of collection. One- to four-family residential real estate loans and home equity loans are written down or charged-off no later than 180 days past due, or for residential real estate secured loans having a borrower in bankruptcy, within 60 days of receipt of notification of filing from the bankruptcy court, whichever is sooner. This is subject to completion of a current assessment of the value of the collateral with any outstanding loan balance in excess of the fair value of the property, less costs to sell, written down or charged-off. There were no changes to the Company's accounting policies or methodology used to estimate the allowance for loan losses during the three months ended March 31, 2021. The following table presents allowance for loan losses activity by class for the three months ended March 31, 2021, and allowance for loan loss balances by class and related loan balances by class as of March 31, 2021: Commercial Municipal Residential Home Equity Line of Credit Consumer Unallocated Total Real Estate Construction Other Term Construction For the three months ended March 31, 2021 Beginning balance $ 5,178,000 $ 662,000 $ 3,438,000 $ 171,000 $ 2,579,000 $ 102,000 $ 1,211,000 $ 778,000 $ 2,134,000 $ 16,253,000 Charge offs 5,000 — 142,000 — 29,000 — — 103,000 — 279,000 Recoveries 65,000 — — — 6,000 — 1,000 23,000 — 95,000 Provision (credit) 503,000 (13,000) 784,000 14,000 406,000 29,000 (265,000) 174,000 (1,107,000) 525,000 Ending balance $ 5,741,000 $ 649,000 $ 4,080,000 $ 185,000 $ 2,962,000 $ 131,000 $ 947,000 $ 872,000 $ 1,027,000 $ 16,594,000 Allowance for loan losses as of March 31, 2021 Ending balance specifically evaluated for impairment $ 174,000 $ 21,000 $ 563,000 $ — $ 142,000 $ — $ — $ — $ — $ 900,000 Ending balance collectively evaluated for impairment $ 5,567,000 $ 628,000 $ 3,517,000 $ 185,000 $ 2,820,000 $ 131,000 $ 947,000 $ 872,000 $ 1,027,000 $ 15,694,000 Related loan balances as of March 31, 2021 Ending balance $ 469,974,000 $ 53,394,000 $ 297,488,000 $ 49,476,000 $ 520,317,000 $ 24,796,000 $ 77,210,000 $ 24,117,000 $ — $ 1,516,772,000 Ending balance specifically evaluated for impairment $ 3,201,000 $ 770,000 $ 2,220,000 $ — $ 9,267,000 $ — $ 875,000 $ 7,000 $ — $ 16,340,000 Ending balance collectively evaluated for impairment $ 466,773,000 $ 52,624,000 $ 295,268,000 $ 49,476,000 $ 511,050,000 $ 24,796,000 $ 76,335,000 $ 24,110,000 $ — $ 1,500,432,000 The following table presents allowance for loan losses activity by class for the year ended December 31, 2020 and allowance for loan loss balances by class and related loan balances by class as of December 31, 2020: Commercial Municipal Residential Home Equity Line of Credit Consumer Unallocated Total Real Estate Construction Other Term Construction For the year ended December 31, 2020 Beginning balance $ 3,742,000 $ 365,000 $ 3,329,000 $ 27,000 $ 1,024,000 $ 25,000 $ 1,078,000 $ 867,000 $ 1,182,000 $ 11,639,000 Charge offs 1,088,000 — 27,000 — 66,000 — 153,000 327,000 — 1,661,000 Recoveries — — 37,000 — 34,000 — 22,000 132,000 — 225,000 Provision 2,524,000 297,000 99,000 144,000 1,587,000 77,000 264,000 106,000 952,000 6,050,000 Ending balance $ 5,178,000 $ 662,000 $ 3,438,000 $ 171,000 $ 2,579,000 $ 102,000 $ 1,211,000 $ 778,000 $ 2,134,000 $ 16,253,000 Allowance for loan losses as of December 31, 2020 Ending balance specifically evaluated for impairment $ 112,000 $ 18,000 $ 169,000 $ — $ 163,000 $ — $ — $ — $ — $ 462,000 Ending balance collectively evaluated for impairment $ 5,066,000 $ 644,000 $ 3,269,000 $ 171,000 $ 2,416,000 $ 102,000 $ 1,211,000 $ 778,000 $ 2,134,000 $ 15,791,000 Related loan balances as of December 31, 2020 Ending balance $ 442,121,000 $ 56,565,000 $ 285,015,000 $ 43,783,000 $ 522,070,000 $ 21,600,000 $ 79,750,000 $ 25,857,000 $ — $ 1,476,761,000 Ending balance specifically evaluated for impairment $ 3,029,000 $ 770,000 $ 1,779,000 $ — $ 9,414,000 $ — $ 1,039,000 $ 8,000 $ — $ 16,039,000 Ending balance collectively evaluated for impairment $ 439,092,000 $ 55,795,000 $ 283,236,000 $ 43,783,000 $ 512,656,000 $ 21,600,000 $ 78,711,000 $ 25,849,000 $ — $ 1,460,722,000 The following table presents allowance for loan losses activity by class for the three months ended March 31, 2020, and allowance for loan loss balances by class and related loan balances by class as of March 31, 2020: Commercial Municipal Residential Home Equity Line of Credit Consumer Unallocated Total Real Estate Construction Other Term Construction For the three months ended March 31, 2020 Beginning balance $ 3,742,000 $ 365,000 $ 3,329,000 $ 27,000 $ 1,024,000 $ 25,000 $ 1,078,000 $ 867,000 $ 1,182,000 $ 11,639,000 Charge offs — — — — 2,000 — 153,000 100,000 — 255,000 Recoveries — — 20,000 — 10,000 — 1,000 43,000 — 74,000 Provision (credit) 120,000 59,000 (922,000) 2,000 194,000 7,000 86,000 (85,000) 939,000 400,000 Ending balance $ 3,862,000 $ 424,000 $ 2,427,000 $ 29,000 $ 1,226,000 $ 32,000 $ 1,012,000 $ 725,000 $ 2,121,000 $ 11,858,000 Allowance for loan losses as of March 31, 2020 Ending balance specifically evaluated for impairment $ 230,000 $ 3,000 $ 172,000 $ — $ 233,000 $ — $ 296,000 $ 58,000 $ — $ 992,000 Ending balance collectively evaluated for impairment $ 3,632,000 $ 421,000 $ 2,255,000 $ 29,000 $ 993,000 $ 32,000 $ 716,000 $ 667,000 $ 2,121,000 $ 10,866,000 Related loan balances as of March 31, 2020 Ending balance $ 382,753,000 $ 43,913,000 $ 237,896,000 $ 43,537,000 $ 500,971,000 $ 15,202,000 $ 90,674,000 $ 29,262,000 $ — $ 1,344,208,000 Ending balance specifically evaluated for impairment $ 6,223,000 $ 947,000 $ 990,000 $ — $ 12,038,000 $ — $ 2,228,000 $ 67,000 $ — $ 22,493,000 Ending balance collectively evaluated for impairment $ 376,530,000 $ 42,966,000 $ 236,906,000 $ 43,537,000 $ 488,933,000 $ 15,202,000 $ 88,446,000 $ 29,195,000 $ — $ 1,321,715,000

Stock-Based Compensation

Stock-Based Compensation	3 Months Ended
	Mar. 31, 2021
Share-based Payment Arrangement [Abstract]
Stock-Based Compensation	Stock-Based Compensation At the 2010 Annual Meeting, shareholders approved the 2010 Equity Incentive Plan (the "2010 Plan"). The 2010 Plan expired on April 28, 2020, leaving 215,513 shares not issued. At the 2020 Annual Meeting, shareholders approved the 2020 Equity Incentive Plan (the "2020 Plan"). The 2020 Plan reserves 400,000 shares of common stock for issuance in connection with stock options, restricted stock awards and other equity based awards to attract and retain the best available personnel, provide additional incentive to officers, employees and non-employee Directors and promote the success of the Company. Such grants and awards will be structured in a manner that does not encourage the recipients to expose the Company to undue or inappropriate risk. Options issued under the 2020 Plan qualify for treatment as incentive stock options for purposes of Section 422 of the Internal Revenue Code. Other compensation under the 2020 Plan will qualify as performance-based for purposes of Section 162(m) of the Internal Revenue Code, and will satisfy NASDAQ guidelines relating to equity compensation. As of March 31, 2021, 184,487 shares of restricted stock had been granted under the 2010 Plan and 40,439 shares under the 2020 Plan, of which 85,740 shares remain restricted as of March 31, 2021 as detailed in the following table: Year Vesting Term Shares Remaining Term 2017 5.0 5,774 0.8 2018 4.0 706 0.8 2018 5.0 6,184 1.8 2019 3.0 16,254 0.8 2020 1.0 3,500 0.2 2020 2.0 694 0.8 2020 3.0 20,842 1.8 2021 0.4 250 0.2 2021 1.0 4,114 0.8 2021 3.0 27,422 2.8 85,740 1.8 The compensation cost related to these nonvested restricted stock grants is $2,230,000 and is recognized over the vesting terms of each grant. In the three months ended March 31, 2021, $288,000 of expense was recognized for these restricted shares, leaving $1,252,000 in unrecognized expense as of March 31, 2021. In the three months ended March 31, 2020, $150,000 of expense was recognized for restricted shares, leaving $797,000 in unrecognized expense as of March 31, 2020.

Common Stock

Common Stock	3 Months Ended
	Mar. 31, 2021
Stockholders' Equity Note [Abstract]
Common Stock	Common StockProceeds from sale of common stock totaled $182,000 and $163,000 for the three months ended March 31, 2021 and 2020, respectively.

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2021
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share The following table sets forth the computation of basic and diluted earnings per share (EPS) for the three months ended March 31, 2021 and 2020: Income (Numerator) Shares (Denominator) Per-Share Amount For the three months ended March 31, 2021 Net income as reported $ 8,922,000 Basic EPS: Income available to common shareholders 8,922,000 10,888,133 $ 0.82 Effect of dilutive securities: restricted stock 85,679 Diluted EPS: Income available to common shareholders plus assumed conversions $ 8,922,000 10,973,812 $ 0.81 For the three months ended March 31, 2020 Net income as reported $ 6,495,000 Basic EPS: Income available to common shareholders 6,495,000 10,844,600 $ 0.60 Effect of dilutive securities: restricted stock 69,753 Diluted EPS: Income available to common shareholders plus assumed conversions $ 6,495,000 10,914,353 $ 0.60

Employee Benefit Plans

Employee Benefit Plans	3 Months Ended
	Mar. 31, 2021
Retirement Benefits, Description [Abstract]
Employee Benefit Plans	Employee Benefit Plans 401(k) Plan The Bank has a defined contribution plan available to substantially all employees who have completed 3 months of service. Employees may contribute up to Internal Revenue Service ("IRS") determined limits and the Bank may match employee contributions not to exceed 3.0% of compensation depending on contribution level. Subject to a vote of the Board of Directors, the Bank may also make a profit-sharing contribution to the Plan. Such contribution equaled 3.0% of each eligible employee's compensation in 2020. The Company adopted the safe harbor form of 401(k) plan for 2021 and will follow safe harbor guidelines when determining the level of discretionary contribution. The expense related to the 401(k) plan was $217,000 and $255,000 for the three months ended March 31, 2021 and 2020, respectively. Deferred Compensation and Supplemental Retirement Benefits The Bank also provides unfunded supplemental retirement benefits for certain officers, payable in installments over 20 years upon retirement or death. The agreements consist of individual contracts with differing characteristics that, when taken together, do not constitute a postretirement plan. The costs for these benefits are recognized over the service periods of the participating officers in accordance with Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") Topic 712 "Compensation – Nonretirement Postemployment Benefits". The expense of these supplemental retirement benefits was $42,000 and $40,000 for the three months ended March 31, 2021 and 2020, respectively. As of March 31, 2021, the associated accrued liability included in other liabilities in the balance sheet was $2,961,000 compared to $2,991,000 and $2,772,000 at December 31, 2020 and March 31, 2020, respectively. Post-Retirement Benefit Plans The Bank sponsors two post-retirement benefit plans. One plan currently provides a subsidy for health insurance premiums to certain retired employees and a future subsidy for six active employees who were age 50 and over in 1996. These subsidies are based on years of service and range between $40 and $1,200 per month per person. The other plan provides life insurance coverage to certain retired employees and health insurance for retired directors. None of these plans are pre-funded. The Company utilizes FASB ASC Topic 712 to recognize the overfunded or underfunded status of a defined benefit postretirement plan as an asset or liability in its balance sheet and to recognize changes in the funded status in the year in which the changes occur through comprehensive income (loss). The following table sets forth the accumulated postretirement benefit obligation and funded status: At or for the three months ended March 31, 2021 2020 Change in benefit obligation Benefit obligation at beginning of year $ 1,523,000 $ 1,581,000 Interest cost 7,000 16,000 Benefits paid (24,000) (27,000) Benefit obligation at end of period $ 1,506,000 $ 1,570,000 Funded status Benefit obligation at end of period $ (1,506,000) $ (1,570,000) Unamortized gain (35,000) (31,000) Accrued benefit cost at end of period $ (1,541,000) $ (1,601,000) The following table sets forth the net periodic pension cost: For the three months ended March 31, 2021 2020 Components of net periodic benefit cost Interest cost $ 7,000 $ 16,000 Net periodic benefit cost $ 7,000 $ 16,000 Amounts not yet reflected in net periodic benefit cost and included in accumulated other comprehensive income are as follows: March 31, December 31, 2020 March 31, Unamortized net actuarial gain $ 35,000 $ 35,000 $ 31,000 Deferred tax expense (7,000) (7,000) (7,000) Net unrecognized postretirement benefits included in accumulated other comprehensive income $ 28,000 $ 28,000 $ 24,000 A weighted average discount rate of 2.00% was used in determining the accumulated benefit obligation and the net periodic benefit cost. The assumed health care cost trend rate is 7.0%. The measurement date for benefit obligations was as of year-end for prior years presented. The expected benefit payments for all of 2021 are $97,000. Plan expense for 2021 is estimated to be $30,000. A 1% change in trend assumptions would create an approximate change in the same direction of $100,000 in the accumulated benefit obligation, $7,000 in the interest cost and $1,000 in the service cost.

Other Comprehensive Income (Los

Other Comprehensive Income (Loss)	3 Months Ended
	Mar. 31, 2021
Equity [Abstract]
Other Comprehensive Income (Loss)	Other Comprehensive Income (Loss) The following table summarizes activity in the unrealized gain or loss on available for sale securities included in other comprehensive income (loss) for the three months ended March 31, 2021 and 2020. For the three months ended March 31, 2021 2020 Balance at beginning of period $ 5,009,000 $ 3,657,000 Unrealized gains (losses) arising during the period (5,945,000) 6,109,000 Reclassification of net realized gains during the period (119,000) (752,000) Related deferred taxes 1,274,000 (1,124,000) Net change (4,790,000) 4,233,000 Balance at end of period $ 219,000 $ 7,890,000 The reclassification of realized gains is included in the net securities gains line of the consolidated statements of income and comprehensive income and the tax effect is included in the income tax expense line of the same statement. The following table summarizes activity in the unrealized loss on securities transferred from available for sale to held to maturity included in other comprehensive income (loss) for the three months ended March 31, 2021 and 2020. For the three months ended March 31, 2021 2020 Balance at beginning of period $ (133,000) $ (182,000) Amortization of net unrealized gains 11,000 10,000 Related deferred taxes (2,000) (2,000) Net change 9,000 8,000 Balance at end of period $ (124,000) $ (174,000) The following table presents the effect of the Company's derivative financial instruments included in other comprehensive income (loss) for the three months ended March 31, 2021 and 2020. For the three months ended March 31, 2021 2020 Balance at beginning of period $ (4,932,000) $ 97,000 Unrealized gains (losses) on cash flow hedging derivatives arising during the period 4,390,000 (6,165,000) Related deferred taxes (921,000) 1,295,000 Net change 3,469,000 (4,870,000) Balance at end of period $ (1,463,000) $ (4,773,000) The following table summarizes activity in the unrealized gain or loss on postretirement benefits included in other comprehensive income (loss) for the three months ended March 31, 2021 and 2020. For the three months ended March 31, 2021 2020 Unrecognized postretirement benefits at beginning of period $ 28,000 $ 24,000 Amortization of unrecognized transition obligation — — Change in unamortized net actuarial gain (loss) — — Related deferred taxes — — Unrecognized postretirement benefits at end of period $ 28,000 $ 24,000

Financial Derivative Instrument

Financial Derivative Instruments	3 Months Ended
	Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Financial Derivative Instruments	Financial Derivative Instruments The Bank uses derivative financial instruments for risk management purposes and not for trading or speculative purposes. As part of its overall asset and liability management strategy, the Bank periodically uses derivative instruments to minimize significant unplanned fluctuations in earnings and cash flows caused by interest rate volatility. The Bank’s interest rate risk management strategy involves modifying the re-pricing characteristics of certain assets or liabilities so that changes in interest rates do not have a significant effect on net interest income. The Bank recognizes its derivative instruments in the consolidated balance sheet at fair value. On the date the derivative instrument is entered into, the Bank designates whether the derivative is part of a hedging relationship (i.e., cash flow or fair value hedge). The Bank formally documents relationships between hedging instruments and hedged items, as well as its risk management objective and strategy for undertaking hedge transactions. The Bank also assesses, both at the hedge’s inception and on an ongoing basis, whether the derivatives used in hedging transactions are highly effective in offsetting the changes in cash flows or fair values of hedged items. Changes in fair value of derivative instruments that are highly effective and qualify as cash flow hedges are recorded in other comprehensive income or loss. Any ineffective portion is recorded in earnings. The Bank discontinues hedge accounting when it is determined that the derivative is no longer highly effective in offsetting changes of the hedged risk on the hedged item, or management determines that the designation of the derivative as a hedging instrument is no longer appropriate. The details of the interest rate swap agreements are as follows: March 31, 2021 December 31, 2020 March 31, 2020 Effective Date Maturity Date Variable Index Received Fixed Rate Paid Presentation on Consolidated Balance Sheet Notional Amount Fair Value Notional Amount Fair Value Notional Amount Fair Value 06/28/2016 06/28/2021 1-Month USD Libor 0.940% Other Liabilities $ 30,000,000 $ (61,000) $ 30,000,000 $ (121,000) $ 30,000,000 $ (244,000) 06/27/2016 06/27/2021 1-Month USD Libor 0.893% Other Liabilities 20,000,000 (38,000) 20,000,000 (76,000) 20,000,000 (151,000) 08/02/2019 08/02/2024 1-Month USD Libor 1.590% Other Liabilities 12,500,000 (458,000) 12,500,000 (626,000) 12,500,000 (663,000) 08/05/2019 08/05/2024 1-Month USD Libor 1.420% Other Liabilities 12,500,000 (387,000) 12,500,000 (550,000) 12,500,000 (571,000) 02/12/2020 02/12/2023 3-Month USD Libor 1.486% Other Liabilities 25,000,000 (580,000) 25,000,000 (695,000) 25,000,000 (748,000) 02/12/2020 02/12/2024 3-Month USD Libor 1.477% Other Liabilities 25,000,000 (735,000) 25,000,000 (972,000) 25,000,000 (972,000) 06/28/2021 06/28/2026 1-Month USD Libor 1.158% Other Liabilities 50,000,000 (352,000) 50,000,000 (1,872,000) 50,000,000 (1,569,000) 03/13/2020 03/13/2025 3-Month USD Libor 0.855% Other Liabilities 25,000,000 (99,000) 25,000,000 (551,000) 25,000,000 (463,000) 03/13/2020 03/13/2030 3-Month USD Libor 1.029% Other (Liabilities) Assets 20,000,000 1,071,000 20,000,000 (339,000) 20,000,000 (661,000) 04/07/2020 04/07/2023 3-Month USD Libor 0.599% Other Liabilities 20,000,000 (129,000) 20,000,000 (185,000) — — 04/07/2020 04/07/2024 3-Month USD Libor 0.643% Other Liabilities 20,000,000 (84,000) 20,000,000 (255,000) — — $260,000,000 $(1,852,000) $260,000,000 $(6,242,000) $220,000,000 $(6,042,000) During the first quarter of 2020, the Bank took advantage of market opportunities to restructure several interest rate swap positions and extend funding at favorable interest rates; one-time charges totaling $1.76 million were incurred and expensed in the first quarter of 2020 in connection with the restructuring. The Company would reclassify unrealized gains or losses accounted for within accumulated other comprehensive income (loss) into earnings if the interest rate swaps were to become ineffective or the swaps were to terminate. In the next 12 months, the Company does not believe it will be required to reclassify any unrealized gains or losses accounted for within accumulated other comprehensive income (loss) into earnings as a result of ineffectiveness or swap termination. Amounts paid or received under the swaps are reported in interest expense in the consolidated statement of income, and in interest paid in the consolidated statement of cash flows. Customer loan derivatives The Bank will enter into interest rate swaps with qualified commercial customers. Through these arrangements, the Bank is able to provide a means for a loan customer to obtain a long-term fixed rate, while it simultaneously contracts with an approved, highly-rated, third-party financial institution as counterparty to swap the fixed rate for a variable rate. Such loan level arrangements are not designated as hedges for accounting purposes, and are recorded at fair value in the Company’s consolidated balance sheet. At March 31, 2021, there were six customer loan swap arrangements in place, detailed below: March 31, 2021 December 31, 2020 March 31, 2020 Presentation on Consolidated Balance Sheet Number of Positions Notional Amount Fair Value Number of Positions Notional Amount Fair Value Number of Positions Notional Amount Fair Value Pay Fixed, Receive Variable Other Assets 3 $ 16,797,000 $ 1,272,000 3 $ 16,922,000 $ 37,000 — $ — $ — Pay Fixed, Receive Variable Other Liabilities 3 25,059,000 (1,334,000) 2 16,065,000 (2,603,000) 2 16,294,000 (3,280,000) 6 41,856,000 (62,000) 5 32,987,000 (2,566,000) 2 16,294,000 (3,280,000) Receive Fixed, Pay Variable Other Assets 3 25,059,000 1,334,000 2 16,065,000 2,603,000 2 16,294,000 3,280,000 Receive Fixed, Pay Variable Other Liabilities 3 16,797,000 (1,272,000) 3 16,922,000 (37,000) — — — 6 41,856,000 62,000 5 32,987,000 2,566,000 2 16,294,000 3,280,000 Total 12 $ 83,712,000 $ — 10 $ 65,974,000 $ — 4 $ 32,588,000 $ — Derivative collateral The Bank has entered into a master netting arrangement with its counterparty and settles payments with the counterparty as necessary. The Bank's arrangement with its institutional counterparty requires it to post cash or other assets as collateral for its various loan swap contracts in a net liability position based on their fair values and the Bank's credit rating or receive cash collateral for contracts in a net asset position as requested. At March 31, 2021, the Bank posted to the counterparty $4,850,000 of cash as collateral on its swap contracts. The required amount to be pledged was $2,119,000. Cessation of LIBOR The Company is aware that certain tenors of USD LIBOR may no longer be published after December 31, 2021, while other tenors are expected to continue being published until June 30, 2023. The Federal Reserve formed the Alternative Reference Rates Committee (ARRC) to guide the transition process in the United States. ARRC has issued a number of recommendations including the adoption of the Secured Overnight Financing Rate (SOFR) as a replacement for LIBOR. The International Swap and Derivatives Association (ISDA), the organization that oversees and guides swap and derivatives markets and participants, continues to work on transitions and recently issued a voluntary fallback protocol for market participants. The Company has formed a working group to address the change away from LIBOR. Management intends to continue to monitor developments from ARRC and ISDA, along with guidance from US banking regulators, closely, and expects to pursue the steps ultimately recommended to provide for an orderly transition to a post-LIBOR environment. Each of the interest rate swap contracts the Company has in place as of March 31, 2021 is tied to a LIBOR tenor expected to be published until June 2023. Two contracts carrying a total notional value of $50 million are set to mature in 2021; two additional contracts with a total notional value of $45 million mature prior to June 30, 2023, and an additional seven contracts with a total notional amount of $165 million have maturity dates beyond June 30, 2023. The six customer loan swap contracts shown in the table immediately above have maturity dates of December 19, 2029, August 21, 2030, April 30, 2031, July 1, 2035, October 1, 2035 and April 1, 2039.

Mortgage Servicing Rights

Mortgage Servicing Rights	3 Months Ended
	Mar. 31, 2021
Transfers and Servicing [Abstract]
Mortgage Servicing Rights	Mortgage Servicing Rights FASB ASC Topic 860 "Transfers and Servicing" requires all separately recognized servicing assets and servicing liabilities to be initially measured at fair value, if practicable. The Company's servicing assets and servicing liabilities are reported using the amortization method and carried at the lower of amortized cost or fair value by strata. In evaluating the carrying values of mortgage servicing rights, the Company obtains third party valuations based on loan level data including note rate, type and term of the underlying loans. The model utilizes several assumptions, the most significant of which is loan prepayments, calculated using a three-months moving average of weekly prepayment data published by the Public Securities Association (PSA) and modeled against the serviced loan portfolio, and the discount rate to discount future cash flows. As of March 31, 2021, the prepayment assumption using the PSA model was 254, which translates into an anticipated prepayment rate of 15.24%. The discount rate is 9.00%. Other assumptions include delinquency rates, foreclosure rates, servicing cost inflation, and annual unit loan cost. All assumptions are adjusted periodically to reflect current circumstances. Amortization of mortgage servicing rights, as well as write-offs due to prepayments of the related mortgage loans, are recorded as a charge against mortgage servicing fee income. For the three months ended March 31, 2021 and 2020, servicing rights capitalized totaled $328,000 and $129,000, respectively. Servicing rights amortized for the three-month periods ended March 31, 2021 and 2020 were $151,000 and $66,000, respectively. The fair value of servicing rights was $2,608,000, $1,985,000 and $2,126,000 at March 31, 2021, December 31, 2020 and March 31, 2020, respectively. The Bank serviced loans for others totaling $335,938,000, $318,459,000 and $268,077,000 at March 31, 2021, December 31, 2020, and March 31, 2020, respectively. The Bank recorded an impairment reserve as of March 31, 2021 and December 31, 2020 for strata with a fair value lower than cost. There was no impairment reserve as of March 31, 2020. Mortgage servicing rights are included in other assets and detailed in the following table: March 31, December 31, March 31, Mortgage servicing rights $ 7,627,000 $ 7,299,000 $ 6,269,000 Accumulated amortization (5,136,000) (4,985,000) (4,660,000) Amortized cost 2,491,000 2,314,000 1,609,000 Impairment reserve (92,000) (358,000) — Carrying value $ 2,399,000 $ 1,956,000 $ 1,609,000

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income TaxesFASB ASC Topic 740 "Income Taxes" defines the criteria that an individual tax position must satisfy for some or all of the benefits of that position to be recognized in a company's financial statements. Topic 740 prescribes a recognition threshold of more-likely-than-not, and a measurement attribute for all tax positions taken or expected to be taken on a tax return, in order for those tax positions to be recognized in the financial statements. The Company is currently open to audit under the statute of limitations by the IRS for the years ended December 31, 2018 through 2020.

Certificates of Deposit

Certificates of Deposit	3 Months Ended
	Mar. 31, 2021
Deposits [Abstract]
Certificates of Deposit	Certificates of Deposit The following table represents the breakdown of certificates of deposit at March 31, 2021 and 2020, and at December 31, 2020: March 31, 2021 December 31, 2020 March 31, 2020 Certificates of deposit < $100,000 $ 230,290,000 $ 246,875,000 $ 274,621,000 Certificates $100,000 to $250,000 343,805,000 295,672,000 364,530,000 Certificates $250,000 and over 60,235,000 63,038,000 71,787,000 $ 634,330,000 $ 605,585,000 $ 710,938,000

Reclassifications

Reclassifications	3 Months Ended
	Mar. 31, 2021
Accounting Changes and Error Corrections [Abstract]
Reclassifications	ReclassificationsCertain items from the prior year were reclassified in the consolidated financial statements to conform with the current year presentation. These do not have a material impact on the consolidated balance sheet or statement of income and comprehensive income presentations.

Fair Value

Fair Value	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value	Fair Value Certain assets and liabilities are recorded at fair value to provide additional insight into the Company's quality of earnings. Some of these assets and liabilities are measured on a recurring basis while others are measured on a nonrecurring basis, with the determination based upon applicable existing accounting pronouncements. For example, securities available for sale are recorded at fair value on a recurring basis. Other assets, such as, other real estate owned and impaired loans, are recorded at fair value on a nonrecurring basis using the lower of cost or market methodology to determine impairment of individual assets. The Company groups assets and liabilities which are recorded at fair value in three levels, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. A financial instrument's level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement (with level 1 considered highest and level 3 considered lowest). A brief description of each level follows: Level 1 - Valuation is based upon quoted prices for identical instruments in active markets. Level 2 - Valuation is based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market. Level 3 - Valuation is generated from model-based techniques that use at least one significant assumption not observable in the market. These unobservable assumptions reflect estimates that market participants would use in pricing the asset or liability. Valuation includes use of discounted cash flow models and similar techniques. The fair value methods and assumptions for the Company's financial instruments and other assets measured at fair value are set forth below. Investment Securities The fair values of investment securities are estimated by independent providers using a market approach with observable inputs, including matrix pricing and recent transactions. In obtaining such valuation information from third parties, the Company has evaluated their valuation methodologies used to develop the fair values in order to determine whether the valuations are representative of an exit price in the Company's principal markets. The Company's principal markets for its securities portfolios are the secondary institutional markets, with an exit price that is predominantly reflective of bid level pricing in those markets. Fair values are calculated based on the value of one unit without regard to any premium or discount that may result from concentrations of ownership of a financial instrument, possible tax ramifications, or estimated transaction costs. If these considerations had been incorporated into the fair value estimates, the aggregate fair value could have been changed. Loans Fair values are estimated for portfolios of loans based on exit pricing notion. The fair values of performing loans are calculated by discounting scheduled cash flows through the estimated maturity using estimated market discount rates that reflect the credit and interest risk inherent in the loan. The estimates of maturity are based on the Company's historical experience with repayments for each loan classification, modified, as required, by an estimate of the effect of current economic and lending conditions, and the effects of estimated prepayments. Assumptions regarding credit risk, cash flows, and discount rates are judgmentally determined using available market information and specific borrower information. Management has made estimates of fair value using discount rates that it believes to be reasonable. However, because there is no market for many of these financial instruments, Management has no basis to determine whether the fair value presented above would be indicative of the value negotiated in an actual sale. As such, the Company classifies loans as Level 3, except for certain collateral-dependent impaired loans. Fair values of impaired loans are based on estimated cash flows and are discounted using a rate commensurate with the risk associated with the estimated cash flows, or if collateral dependent, discounted to the appraised value of the collateral as determined by reference to sale prices of similar properties, less costs to sell. As such, the Company classifies collateral dependent impaired loans for which a specific reserve results in a fair value measure as Level 2. All other impaired loans are classified as Level 3. Other Real Estate Owned Real estate acquired through foreclosure is initially recorded at fair value. The fair value of other real estate owned is based on property appraisals and an analysis of similar properties currently available. As such, the Company records other real estate owned as nonrecurring Level 2. Mortgage Servicing Rights Mortgage servicing rights represent the value associated with servicing residential mortgage loans. Servicing assets and servicing liabilities are reported using the amortization method and compared to fair value for impairment. In evaluating the fair values of mortgage servicing rights, the Company obtains third party valuations based on loan level data including note rate, type and term of the underlying loans. As such, the Company classifies mortgage servicing rights as Level 2. Time Deposits The fair value of maturity deposits is based on the discounted value of contractual cash flows using a replacement cost of funds approach. The discount rate is estimated using the cost of funds borrowing rate in the market. As such, the Company classifies deposits as Level 2. Borrowed Funds The fair value of borrowed funds is based on the discounted value of contractual cash flows. The discount rate is estimated using the rates currently available for borrowings of similar remaining maturities. As such, the Company classifies borrowed funds as Level 2. Derivatives The fair value of interest rate swaps is determined using inputs that are observable in the market place obtained from third parties including yield curves, publicly available volatilities, and floating indexes and, accordingly, are classified as Level 2 inputs. The credit value adjustments associated with derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by the Company and its counterparties. As of March 31, 2021 and 2020, and December 31, 2020, the Company has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and has determined that the credit valuation adjustments are not significant to the overall valuation of its derivatives due to collateral postings. Customer Loan Derivatives The valuation of the Company’s customer loan derivatives is obtained from a third-party pricing service and is determined using a discounted cash flow analysis on the expected cash flows of each derivative. The pricing analysis is based on observable inputs for the contractual terms of the derivatives, including the period to maturity and interest rate curves. The Company incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, the Company has considered the impact of master netting arrangements and any applicable credit enhancements, such as collateral postings. Limitations Fair value estimates are made at a specific point in time, based on relevant market information and information about the financial instrument. These values do not reflect any premium or discount that could result from offering for sale at one time the Company's entire holdings of a particular financial instrument. Because no market exists for a significant portion of the Company's financial instruments, fair value estimates are based on Management's judgments regarding future expected loss experience, current economic conditions, risk characteristics of various financial instruments, and other factors. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and therefore cannot be determined with precision. Changes in assumptions could significantly affect the estimates. Fair value estimates are based on existing on- and off-balance-sheet financial instruments without attempting to estimate the value of anticipated future business and the value of assets and liabilities that are not considered financial instruments. Other significant assets and liabilities that are not considered financial instruments include the deferred tax asset, premises and equipment, and other real estate owned. In addition, tax ramifications related to the realization of the unrealized gains and losses can have a significant effect on fair value estimates and have not been considered in any of the estimates. Assets and Liabilities Recorded at Fair Value on a Recurring Basis The following tables present the balances of assets and liabilities that were measured at fair value on a recurring basis as of March 31, 2021, December 31, 2020 and March 31, 2020. At March 31, 2021 Level 1 Level 2 Level 3 Total Securities available for sale U.S. Government-sponsored agencies $ — $ 21,485,000 $ — $ 21,485,000 Mortgage-backed securities — 227,914,000 — 227,914,000 State and political subdivisions — 37,558,000 — 37,558,000 Asset-backed securities — 7,580,000 — 7,580,000 Total securities available for sale — 294,537,000 — 294,537,000 Interest rate swap agreements — 1,071,000 — 1,071,000 Customer loan interest swap agreements — 2,606,000 — 2,606,000 Total interest rate swap agreements — 3,677,000 — 3,677,000 Total assets $ — $ 298,214,000 $ — $ 298,214,000 At March 31, 2021 Level 1 Level 2 Level 3 Total Interest rate swap agreements $ — $ 2,923,000 $ — $ 2,923,000 Customer loan interest swap agreements — 2,606,000 — 2,606,000 Total liabilities $ — $ 5,529,000 $ — $ 5,529,000 At December 31, 2020 Level 1 Level 2 Level 3 Total Securities available for sale U.S. Government-sponsored agencies $ — $ 22,730,000 $ — $ 22,730,000 Mortgage-backed securities — 243,406,000 — 243,406,000 State and political subdivisions — 39,474,000 — 39,474,000 Asset-backed securities — 7,766,000 — 7,766,000 Total securities available for sale — 313,376,000 — 313,376,000 Customer loan interest swap agreements — 2,640,000 — 2,640,000 Total interest rate swap agreements — 2,640,000 — 2,640,000 Total assets $ — $ 316,016,000 $ — $ 316,016,000 At December 31, 2020 Level 1 Level 2 Level 3 Total Interest rate swap agreements $ — $ 6,242,000 $ — $ 6,242,000 Customer loan interest swap agreements — 2,640,000 — 2,640,000 Total liabilities $ — $ 8,882,000 $ — $ 8,882,000 At March 31, 2020 Level 1 Level 2 Level 3 Total Securities available for sale U.S. Treasury and agency $ — $ 7,552,000 $ — $ 7,552,000 Mortgage-backed securities — 285,152,000 — 285,152,000 State and political subdivisions — 20,224,000 — 20,224,000 Total securities available for sale — 312,928,000 — 312,928,000 Customer loan interest swap agreements — 3,280,000 — 3,280,000 Total interest swap agreements — 3,280,000 — 3,280,000 Total assets $ — $ 316,208,000 $ — $ 316,208,000 At March 31, 2020 Level 1 Level 2 Level 3 Total Interest rate swap agreements $ — $ 6,042,000 $ — $ 6,042,000 Customer loan interest swap agreements — 3,280,000 — 3,280,000 Total liabilities $ — $ 9,322,000 $ — $ 9,322,000 Assets Recorded at Fair Value on a Non-Recurring Basis The following tables include assets measured at fair value on a nonrecurring basis that have had a fair value adjustment since their initial recognition. Mortgage servicing rights are presented net of an impairment reserve of $92,000 at March 31, 2021 and $358,000 at December 31, 2020. Other real estate owned is presented net of an allowance of $45,000 at both March 31, 2021 and December 31, 2020. There was no allowance for other real estate owned at March 31, 2020. Only collateral-dependent impaired loans with a related specific allowance for loan losses or a partial charge off are included in impaired loans for purposes of fair value disclosures. Impaired loans below are presented net of specific allowances of $641,000, $304,000 and $706,000 at March 31, 2021, December 31, 2020, and March 31, 2020, respectively. At March 31, 2021 Level 1 Level 2 Level 3 Total Mortgage servicing rights $ — $ 2,608,000 $ — $ 2,608,000 Other real estate owned — 401,000 — 401,000 Impaired loans — 234,000 — 234,000 Total assets $ — $ 3,243,000 $ — $ 3,243,000 At December 31, 2020 Level 1 Level 2 Level 3 Total Mortgage servicing rights $ — $ 1,985,000 $ — $ 1,985,000 Other real estate owned — 908,000 — 908,000 Impaired loans — 794,000 — 794,000 Total assets $ — $ 3,687,000 $ — $ 3,687,000 At March 31, 2020 Level 1 Level 2 Level 3 Total Other real estate owned $ — $ 316,000 $ — $ 316,000 Impaired loans — 1,051,000 — 1,051,000 Total assets $ — $ 1,367,000 $ — $ 1,367,000 Fair Value of Financial Instruments FASB ASC Topic 825 "Financial Instruments" requires disclosures of fair value information about financial instruments, whether or not recognized in the balance sheet, if the fair values can be reasonably determined. Fair value is best determined based upon quoted market prices. However, in many instances, there are no quoted market prices for the Company's various financial instruments. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques using observable inputs when available. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. Accordingly, the fair value estimates may not be realized in an immediate settlement of the instrument. Topic 825 excludes certain financial instruments and all nonfinancial instruments from its disclosure requirements. Accordingly, the aggregate fair value amounts presented may not necessarily represent the underlying fair value of the Company. This summary excludes financial assets and liabilities for which carrying value approximates fair values and financial instruments that are recorded at fair value on a recurring basis. Financial instruments for which carrying values approximate fair value include cash equivalents, interest-bearing deposits in other banks, demand, NOW, savings and money market deposits. The estimated fair value of demand, NOW, savings and money market deposits is the amount payable on demand at the reporting date. Carrying value is used because the accounts have no stated maturity and the customer has the ability to withdraw funds immediately. The carrying amount and estimated fair values for financial instruments as of March 31, 2021 were as follows: Carrying value Estimated fair value Level 1 Level 2 Level 3 Financial assets Securities to be held to maturity $ 385,352,000 $ 388,836,000 $ — $ 388,836,000 $ — Loans (net of allowance for loan losses) Commercial Real estate 463,854,000 459,158,000 — — 459,158,000 Construction 52,702,000 52,168,000 — — 52,168,000 Other 293,139,000 289,541,000 — 50,000 289,491,000 Municipal 49,279,000 48,698,000 — — 48,698,000 Residential Term 517,160,000 526,134,000 — 184,000 525,950,000 Construction 24,656,000 25,028,000 — — 25,028,000 Home equity line of credit 76,201,000 74,813,000 — — 74,813,000 Consumer 23,187,000 21,304,000 — — 21,304,000 Total loans 1,500,178,000 1,496,844,000 — 234,000 1,496,610,000 Mortgage servicing rights 2,399,000 2,608,000 — 2,608,000 — Financial liabilities Local certificates of deposit $ 246,976,000 $ 249,458,000 $ — $ 249,458,000 $ — National certificates of deposit 387,354,000 359,899,000 — 359,899,000 — Total certificates of deposits 634,330,000 609,357,000 — 609,357,000 — Repurchase agreements 71,952,000 70,105,000 — 70,105,000 — Federal Home Loan Bank and Federal Reserve Bank borrowings 157,696,000 159,184,000 — 159,184,000 — Total borrowed funds 229,648,000 229,289,000 — 229,289,000 — The carrying amounts and estimated fair values for financial instruments as of December 31, 2020 were as follows: Carrying value Estimated fair value Level 1 Level 2 Level 3 Financial assets Securities to be held to maturity $ 365,613,000 $ 377,134,000 $ — $ 377,134,000 $ — Loans (net of allowance for loan losses) Commercial Real estate 436,161,000 440,735,000 — 347,000 440,388,000 Construction 55,803,000 56,388,000 — — 56,388,000 Other 281,057,000 279,501,000 — 5,000 279,496,000 Municipal 43,586,000 44,440,000 — — 44,440,000 Residential Term 519,101,000 533,059,000 — 442,000 532,617,000 Construction 21,483,000 21,890,000 — — 21,890,000 Home equity line of credit 78,356,000 77,177,000 — — 77,177,000 Consumer 24,961,000 23,502,000 — — 23,502,000 Total loans 1,460,508,000 1,476,692,000 — 794,000 1,475,898,000 Mortgage servicing rights 1,956,000 1,985,000 — 1,985,000 — Financial liabilities Local certificates of deposit $ 250,264,000 $ 253,892,000 $ — $ 253,892,000 $ — National certificates of deposit 355,321,000 359,899,000 — 359,899,000 — Total deposits 605,585,000 613,791,000 — 613,791,000 — Repurchase agreements 69,340,000 69,497,000 — 69,497,000 — Federal Home Loan Bank advances 192,698,000 194,469,000 — 194,469,000 — Total borrowed funds 262,038,000 263,966,000 — 263,966,000 — The carrying amount and estimated fair values for financial instruments as of March 31, 2020 were as follows: Carrying value Estimated fair value Level 1 Level 2 Level 3 Financial assets Securities to be held to maturity $ 341,592,000 $ 349,248,000 $ — $ 349,248,000 $ — Loans (net of allowance for loan losses) Commercial Real estate 378,049,000 371,916,000 — 7,000 371,909,000 Construction 43,397,000 42,693,000 — — 42,693,000 Other 234,940,000 233,411,000 — — 233,411,000 Municipal 43,502,000 41,909,000 — — 41,909,000 Residential Term 499,478,000 503,098,000 — 335,000 502,763,000 Construction 15,163,000 15,304,000 — — 15,304,000 Home equity line of credit 89,442,000 89,407,000 — 700,000 88,707,000 Consumer 28,379,000 26,933,000 — 9,000 26,924,000 Total loans 1,332,350,000 1,324,671,000 — 1,051,000 1,323,620,000 Mortgage servicing rights 1,609,000 2,126,000 — 2,126,000 — Financial liabilities Local certificates of deposit $ 290,440,000 $ 290,886,000 $ — $ 290,886,000 $ — National certificates of deposit 420,498,000 429,110,000 — 429,110,000 — Total certificates of deposits 710,938,000 719,996,000 — 719,996,000 — Repurchase agreements 37,937,000 37,494,000 — 37,494,000 — Federal Home Loan Bank advances 210,103,000 211,228,000 — 211,228,000 — Total borrowed funds 248,040,000 248,722,000 — 248,722,000 —

Impact of Recently Issued Accou

Impact of Recently Issued Accounting Standards	3 Months Ended
	Mar. 31, 2021
Accounting Standards Update and Change in Accounting Principle [Abstract]
Impact of Recently Issued Accounting Standards	Impact of Recently Issued Accounting Standards In June 2016, the FASB issued Accounting Standards Update (ASU) No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. Under the new guidance, which will replace the existing incurred loss model for recognizing credit losses, banks and other lending institutions will be required to recognize the full amount of expected credit losses. The new guidance, which is referred to as the current expected credit loss model, requires that expected credit losses for financial assets held at the reporting date that are accounted for at amortized cost be measured and recognized based on historical experience and current and reasonably supportable forecasted conditions to reflect the full amount of expected credit losses. A modified version of these requirements also applies to debt securities classified as available for sale. The ASU was to be effective for all SEC registrants for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. On October 16, 2019, FASB voted to finalize a proposal issued in August 2019 under which the effective implementation date was changed for SEC registrants meeting the definition of a Smaller Reporting Company to fiscal years beginning after December 15, 2022. Early adoption is permitted for fiscal years beginning after December 15, 2018, including interim periods within such years. The Company qualifies as a Smaller Reporting Company. It continues to evaluate the impact of the adoption of the ASU on its consolidated financial statements, and continues to anticipate that it may have a material impact upon adoption. The Bank has formed an implementation committee for ASU No. 2016-13. To date, committee members have participated in educational seminars on the new standards, identified the historical data sets that will be necessary to implement the new standard, and have chosen a third-party vendor who provides software solutions for ASU No. 2016-13 modeling and calculation. The Bank is in the late stages of implementing this software and plans to run incurred loss and current expected credit loss models in parallel until adoption of ASU No. 2016-13. In January 2017, the FASB issued ASU No. 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. The ASU was issued to reduce the cost and complexity of the goodwill impairment test. To simplify the subsequent measurement of goodwill, step two of the goodwill impairment test was eliminated. Instead, a Company will recognize an impairment of goodwill should the carrying value of a reporting unit exceed its fair value (i.e. step one). The ASU was effective for the Company on January 1, 2020 and will be applied prospectively. Implementation of this ASU did not have a material effect on the Company's consolidated financial statements. In August 2018, the FASB issued ASU No. 2018-14, Disclosure Framework - Changes to the Disclosure Requirements for Defined Benefit Plans . This ASU makes minor changes to the disclosure requirements for employers that sponsor defined benefit pension and/or other postretirement benefit plans. ASU 2018-14 is effective for fiscal years ending after December 15, 2020; early adoption is permitted. As ASU 2018-14 only revises disclosure requirements, it did not have a material impact on the Company’s consolidated financial statements.

Basis of Presentation (Policies

Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of PresentationThe First Bancorp, Inc. ("the Company") is a financial holding company that owns all of the common stock of First National Bank ("the Bank"). The accompanying unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of Management, all adjustments (consisting of normally recurring accruals) considered necessary for a fair presentation have been included. All significant intercompany transactions and balances are eliminated in consolidation. The income reported for the 2021 period is not necessarily indicative of the results that may be expected for the year ending December 31, 2021. For further information, refer to the consolidated financial statements and notes included in the Company's annual report on Form 10-K for the year ended December 31, 2020.
Financial Derivative Instruments	The Bank uses derivative financial instruments for risk management purposes and not for trading or speculative purposes. As part of its overall asset and liability management strategy, the Bank periodically uses derivative instruments to minimize significant unplanned fluctuations in earnings and cash flows caused by interest rate volatility. The Bank’s interest rate risk management strategy involves modifying the re-pricing characteristics of certain assets or liabilities so that changes in interest rates do not have a significant effect on net interest income. The Bank recognizes its derivative instruments in the consolidated balance sheet at fair value.  On the date the derivative instrument is entered into, the Bank designates whether the derivative is part of a hedging relationship (i.e., cash flow or fair value hedge). The Bank formally documents relationships between hedging instruments and hedged items, as well as its risk management objective and strategy for undertaking hedge transactions. The Bank also assesses, both at the hedge’s inception and on an ongoing basis, whether the derivatives used in hedging transactions are highly effective in offsetting the changes in cash flows or fair values of hedged items. Changes in fair value of derivative instruments that are highly effective and qualify as cash flow hedges are recorded in other comprehensive income or loss. Any ineffective portion is recorded in earnings. The Bank discontinues hedge accounting when it is determined that the derivative is no longer highly effective in offsetting changes of the hedged risk on the hedged item, or management determines that the designation of the derivative as a hedging instrument is no longer appropriate.
Reclassifications	Certain items from the prior year were reclassified in the consolidated financial statements to conform with the current year presentation. These do not have a material impact on the consolidated balance sheet or statement of income and comprehensive income presentations.
Fair Value	Certain assets and liabilities are recorded at fair value to provide additional insight into the Company's quality of earnings. Some of these assets and liabilities are measured on a recurring basis while others are measured on a nonrecurring basis, with the determination based upon applicable existing accounting pronouncements. For example, securities available for sale are recorded at fair value on a recurring basis. Other assets, such as, other real estate owned and impaired loans, are recorded at fair value on a nonrecurring basis using the lower of cost or market methodology to determine impairment of individual assets. The Company groups assets and liabilities which are recorded at fair value in three levels, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. A financial instrument's level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement (with level 1 considered highest and level 3 considered lowest). A brief description of each level follows: Level 1 - Valuation is based upon quoted prices for identical instruments in active markets. Level 2 - Valuation is based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market. Level 3 - Valuation is generated from model-based techniques that use at least one significant assumption not observable in the market. These unobservable assumptions reflect estimates that market participants would use in pricing the asset or liability. Valuation includes use of discounted cash flow models and similar techniques. The fair value methods and assumptions for the Company's financial instruments and other assets measured at fair value are set forth below. Investment Securities The fair values of investment securities are estimated by independent providers using a market approach with observable inputs, including matrix pricing and recent transactions. In obtaining such valuation information from third parties, the Company has evaluated their valuation methodologies used to develop the fair values in order to determine whether the valuations are representative of an exit price in the Company's principal markets. The Company's principal markets for its securities portfolios are the secondary institutional markets, with an exit price that is predominantly reflective of bid level pricing in those markets. Fair values are calculated based on the value of one unit without regard to any premium or discount that may result from concentrations of ownership of a financial instrument, possible tax ramifications, or estimated transaction costs. If these considerations had been incorporated into the fair value estimates, the aggregate fair value could have been changed. Loans Fair values are estimated for portfolios of loans based on exit pricing notion. The fair values of performing loans are calculated by discounting scheduled cash flows through the estimated maturity using estimated market discount rates that reflect the credit and interest risk inherent in the loan. The estimates of maturity are based on the Company's historical experience with repayments for each loan classification, modified, as required, by an estimate of the effect of current economic and lending conditions, and the effects of estimated prepayments. Assumptions regarding credit risk, cash flows, and discount rates are judgmentally determined using available market information and specific borrower information. Management has made estimates of fair value using discount rates that it believes to be reasonable. However, because there is no market for many of these financial instruments, Management has no basis to determine whether the fair value presented above would be indicative of the value negotiated in an actual sale. As such, the Company classifies loans as Level 3, except for certain collateral-dependent impaired loans. Fair values of impaired loans are based on estimated cash flows and are discounted using a rate commensurate with the risk associated with the estimated cash flows, or if collateral dependent, discounted to the appraised value of the collateral as determined by reference to sale prices of similar properties, less costs to sell. As such, the Company classifies collateral dependent impaired loans for which a specific reserve results in a fair value measure as Level 2. All other impaired loans are classified as Level 3. Other Real Estate Owned Real estate acquired through foreclosure is initially recorded at fair value. The fair value of other real estate owned is based on property appraisals and an analysis of similar properties currently available. As such, the Company records other real estate owned as nonrecurring Level 2. Mortgage Servicing Rights Mortgage servicing rights represent the value associated with servicing residential mortgage loans. Servicing assets and servicing liabilities are reported using the amortization method and compared to fair value for impairment. In evaluating the fair values of mortgage servicing rights, the Company obtains third party valuations based on loan level data including note rate, type and term of the underlying loans. As such, the Company classifies mortgage servicing rights as Level 2. Time Deposits The fair value of maturity deposits is based on the discounted value of contractual cash flows using a replacement cost of funds approach. The discount rate is estimated using the cost of funds borrowing rate in the market. As such, the Company classifies deposits as Level 2. Borrowed Funds The fair value of borrowed funds is based on the discounted value of contractual cash flows. The discount rate is estimated using the rates currently available for borrowings of similar remaining maturities. As such, the Company classifies borrowed funds as Level 2. Derivatives The fair value of interest rate swaps is determined using inputs that are observable in the market place obtained from third parties including yield curves, publicly available volatilities, and floating indexes and, accordingly, are classified as Level 2 inputs. The credit value adjustments associated with derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by the Company and its counterparties. As of March 31, 2021 and 2020, and December 31, 2020, the Company has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and has determined that the credit valuation adjustments are not significant to the overall valuation of its derivatives due to collateral postings. Customer Loan Derivatives The valuation of the Company’s customer loan derivatives is obtained from a third-party pricing service and is determined using a discounted cash flow analysis on the expected cash flows of each derivative. The pricing analysis is based on observable inputs for the contractual terms of the derivatives, including the period to maturity and interest rate curves. The Company incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, the Company has considered the impact of master netting arrangements and any applicable credit enhancements, such as collateral postings. Limitations
Fair Value of Financial Instruments	Fair Value of Financial Instruments FASB ASC Topic 825 "Financial Instruments" requires disclosures of fair value information about financial instruments, whether or not recognized in the balance sheet, if the fair values can be reasonably determined. Fair value is best determined based upon quoted market prices. However, in many instances, there are no quoted market prices for the Company's various financial instruments. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques using observable inputs when available. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. Accordingly, the fair value estimates may not be realized in an immediate settlement of the instrument. Topic 825 excludes certain financial instruments and all nonfinancial instruments from its disclosure requirements. Accordingly, the aggregate fair value amounts presented may not necessarily represent the underlying fair value of the Company. This summary excludes financial assets and liabilities for which carrying value approximates fair values and financial instruments that are recorded at fair value on a recurring basis. Financial instruments for which carrying values approximate fair value include cash equivalents, interest-bearing deposits in other banks, demand, NOW, savings and money market deposits. The estimated fair value of demand, NOW, savings and money market deposits is the amount payable on demand at the reporting date. Carrying value is used because the accounts have no stated maturity and the customer has the ability to withdraw funds immediately.
Impact of Recently Issued Accounting Standards	Impact of Recently Issued Accounting Standards In June 2016, the FASB issued Accounting Standards Update (ASU) No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. Under the new guidance, which will replace the existing incurred loss model for recognizing credit losses, banks and other lending institutions will be required to recognize the full amount of expected credit losses. The new guidance, which is referred to as the current expected credit loss model, requires that expected credit losses for financial assets held at the reporting date that are accounted for at amortized cost be measured and recognized based on historical experience and current and reasonably supportable forecasted conditions to reflect the full amount of expected credit losses. A modified version of these requirements also applies to debt securities classified as available for sale. The ASU was to be effective for all SEC registrants for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. On October 16, 2019, FASB voted to finalize a proposal issued in August 2019 under which the effective implementation date was changed for SEC registrants meeting the definition of a Smaller Reporting Company to fiscal years beginning after December 15, 2022. Early adoption is permitted for fiscal years beginning after December 15, 2018, including interim periods within such years. The Company qualifies as a Smaller Reporting Company. It continues to evaluate the impact of the adoption of the ASU on its consolidated financial statements, and continues to anticipate that it may have a material impact upon adoption. The Bank has formed an implementation committee for ASU No. 2016-13. To date, committee members have participated in educational seminars on the new standards, identified the historical data sets that will be necessary to implement the new standard, and have chosen a third-party vendor who provides software solutions for ASU No. 2016-13 modeling and calculation. The Bank is in the late stages of implementing this software and plans to run incurred loss and current expected credit loss models in parallel until adoption of ASU No. 2016-13. In January 2017, the FASB issued ASU No. 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. The ASU was issued to reduce the cost and complexity of the goodwill impairment test. To simplify the subsequent measurement of goodwill, step two of the goodwill impairment test was eliminated. Instead, a Company will recognize an impairment of goodwill should the carrying value of a reporting unit exceed its fair value (i.e. step one). The ASU was effective for the Company on January 1, 2020 and will be applied prospectively. Implementation of this ASU did not have a material effect on the Company's consolidated financial statements. In August 2018, the FASB issued ASU No. 2018-14, Disclosure Framework - Changes to the Disclosure Requirements for Defined Benefit Plans . This ASU makes minor changes to the disclosure requirements for employers that sponsor defined benefit pension and/or other postretirement benefit plans. ASU 2018-14 is effective for fiscal years ending after December 15, 2020; early adoption is permitted. As ASU 2018-14 only revises disclosure requirements, it did not have a material impact on the Company’s consolidated financial statements.

Investment Securities (Tables)

Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Schedule of Available For Sale, Held-to-Maturity, and Restricted Equity Securities	The following table summarizes the amortized cost and estimated fair value of investment securities at March 31, 2021: Amortized Unrealized Gains Unrealized Losses Fair Value (Estimated) Securities available for sale U.S. Government-sponsored agencies $ 23,045,000 $ — $ (1,560,000) $ 21,485,000 Mortgage-backed securities 227,089,000 4,109,000 (3,284,000) 227,914,000 State and political subdivisions 36,663,000 1,178,000 (283,000) 37,558,000 Asset-backed securities 7,463,000 117,000 — 7,580,000 $ 294,260,000 $ 5,404,000 $ (5,127,000) $ 294,537,000 Securities to be held to maturity U.S. Government-sponsored agencies $ 35,600,000 $ 55,000 $ (2,041,000) $ 33,614,000 Mortgage-backed securities 76,365,000 480,000 (2,181,000) 74,664,000 State and political subdivisions 251,137,000 7,435,000 (525,000) 258,047,000 Corporate securities 22,250,000 347,000 (86,000) 22,511,000 $ 385,352,000 $ 8,317,000 $ (4,833,000) $ 388,836,000 Restricted equity securities Federal Home Loan Bank Stock $ 9,068,000 $ — $ — $ 9,068,000 Federal Reserve Bank Stock 1,037,000 — — 1,037,000 $ 10,105,000 $ — $ — $ 10,105,000 The following table summarizes the amortized cost and estimated fair value of investment securities at December 31, 2020: Amortized Unrealized Gains Unrealized Losses Fair Value (Estimated) Securities available for sale U.S. Government-sponsored agencies $ 23,045,000 $ — $ (315,000) $ 22,730,000 Mortgage-backed securities 238,516,000 5,507,000 (617,000) 243,406,000 State and political subdivisions 37,752,000 1,722,000 — 39,474,000 Asset-backed securities 7,723,000 43,000 — 7,766,000 $ 307,036,000 $ 7,272,000 $ (932,000) $ 313,376,000 Securities to be held to maturity U.S. Government-sponsored agencies $ 44,149,000 $ 143,000 $ (18,000) $ 44,274,000 Mortgage-backed securities 53,594,000 736,000 (195,000) 54,135,000 State and political subdivisions 245,620,000 10,427,000 (3,000) 256,044,000 Corporate securities 22,250,000 433,000 (2,000) 22,681,000 $ 365,613,000 $ 11,739,000 $ (218,000) $ 377,134,000 Restricted equity securities Federal Home Loan Bank Stock $ 9,508,000 $ — $ — $ 9,508,000 Federal Reserve Bank Stock 1,037,000 — — 1,037,000 $ 10,545,000 $ — $ — $ 10,545,000 The following table summarizes the amortized cost and estimated fair value of investment securities at March 31, 2020: Amortized Unrealized Gains Unrealized Losses Fair Value (Estimated) Securities available for sale U.S. Government-sponsored agencies $ 7,500,000 $ 52,000 $ — $ 7,552,000 Mortgage-backed securities 276,235,000 9,106,000 (189,000) 285,152,000 State and political subdivisions 19,206,000 1,018,000 — 20,224,000 $ 302,941,000 $ 10,176,000 $ (189,000) $ 312,928,000 Securities to be held to maturity U.S. Government-sponsored agencies $ 35,981,000 $ 207,000 $ — $ 36,188,000 Mortgage-backed securities 51,142,000 1,392,000 (7,000) 52,527,000 State and political subdivisions 239,719,000 5,819,000 (345,000) 245,193,000 Corporate securities 14,750,000 590,000 — 15,340,000 $ 341,592,000 $ 8,008,000 $ (352,000) $ 349,248,000 Restricted equity securities Federal Home Loan Bank Stock $ 8,957,000 $ — $ — $ 8,957,000 Federal Reserve Bank Stock 1,037,000 — — 1,037,000 $ 9,994,000 $ — $ — $ 9,994,000
Schedule of Contractual Maturities of Investment Securities	The following table summarizes the contractual maturities of investment securities at March 31, 2021: Securities available for sale Securities to be held to maturity Amortized Fair Value (Estimated) Amortized Fair Value (Estimated) Due in 1 year or less $ 2,544,000 $ 2,516,000 $ 3,926,000 $ 3,956,000 Due in 1 to 5 years 12,994,000 13,172,000 26,992,000 27,613,000 Due in 5 to 10 years 50,007,000 50,587,000 173,295,000 178,069,000 Due after 10 years 228,715,000 228,262,000 181,139,000 179,198,000 $ 294,260,000 $ 294,537,000 $ 385,352,000 $ 388,836,000 The following table summarizes the contractual maturities of investment securities at December 31, 2020: Securities available for sale Securities to be held to maturity Amortized Fair Value (Estimated) Amortized Fair Value (Estimated) Due in 1 year or less $ 117,000 $ 120,000 $ 3,607,000 $ 3,641,000 Due in 1 to 5 years 17,718,000 17,915,000 30,867,000 31,792,000 Due in 5 to 10 years 49,697,000 51,001,000 183,679,000 190,153,000 Due after 10 years 239,504,000 244,340,000 147,460,000 151,548,000 $ 307,036,000 $ 313,376,000 $ 365,613,000 $ 377,134,000 The following table summarizes the contractual maturities of investment securities at March 31, 2020: Securities available for sale Securities to be held to maturity Amortized Fair Value (Estimated) Amortized Fair Value (Estimated) Due in 1 year or less $ 66,000 $ 66,000 $ 1,331,000 $ 1,337,000 Due in 1 to 5 years 25,221,000 26,159,000 27,854,000 28,361,000 Due in 5 to 10 years 62,462,000 65,032,000 184,037,000 189,214,000 Due after 10 years 215,192,000 221,671,000 128,370,000 130,336,000 $ 302,941,000 $ 312,928,000 $ 341,592,000 $ 349,248,000
Schedule of Securities Gains and Losses	The following table shows securities gains and losses for the three months ended March 31, 2021 and 2020: For the three months ended March 31, 2021 2020 Proceeds from sales of securities $ 1,214,000 $ 68,620,000 Gross realized gains 119,000 1,098,000 Gross realized losses — (346,000) Net gain $ 119,000 $ 752,000 Related income taxes $ 25,000 $ 158,000
Schedule of Securities Temporarily Impaired	Information regarding securities temporarily impaired as of March 31, 2021 is summarized below: Less than 12 months 12 months or more Total Fair Value (Estimated) Unrealized Losses Fair Value (Estimated) Unrealized Losses Fair Value (Estimated) Unrealized Losses U.S. Government-sponsored agencies $ 51,894,000 $ (3,601,000) $ — $ — $ 51,894,000 $ (3,601,000) Mortgage-backed securities 180,138,000 (5,335,000) 3,744,000 (130,000) 183,882,000 (5,465,000) State and political subdivisions 28,783,000 (808,000) — — 28,783,000 (808,000) Corporate securities 3,414,000 (86,000) — — 3,414,000 (86,000) $ 264,229,000 $ (9,830,000) $ 3,744,000 $ (130,000) $ 267,973,000 $ (9,960,000) As of December 31, 2020, there were 50 securities with unrealized losses held in the Company's portfolio. These securities were temporarily impaired as a result of changes in interest rates reducing their fair value, of which 10 had been temporarily impaired for 12 months or more. Information regarding securities temporarily impaired as of December 31, 2020 is summarized below: Less than 12 months 12 months or more Total Fair Value (Estimated) Unrealized Losses Fair Value (Estimated) Unrealized Losses Fair Value (Estimated) Unrealized Losses U.S. Government-sponsored agencies $ 30,212,000 $ (333,000) $ — $ — $ 30,212,000 $ (333,000) Mortgage-backed securities 65,505,000 (724,000) 3,878,000 (88,000) 69,383,000 (812,000) State and political subdivisions 855,000 (3,000) — — 855,000 (3,000) Corporate securities 2,498,000 (2,000) — — 2,498,000 (2,000) $ 99,070,000 $ (1,062,000) $ 3,878,000 $ (88,000) $ 102,948,000 $ (1,150,000) As of March 31, 2020, there were 70 securities with unrealized losses held in the Company's portfolio. These securities were temporarily impaired as a result of changes in interest rates reducing their fair value, of which 14 had been temporarily impaired for 12 months or more. Information regarding securities temporarily impaired as of March 31, 2020 is summarized below: Less than 12 months 12 months or more Total Fair Value (Estimated) Unrealized Losses Fair Value (Estimated) Unrealized Losses Fair Value (Estimated) Unrealized Losses Mortgage-backed securities $ 2,963,000 $ (27,000) $ 7,424,000 $ (169,000) $ 10,387,000 $ (196,000) State and political subdivisions 19,556,000 (345,000) — — 19,556,000 (345,000) $ 22,519,000 $ (372,000) $ 7,424,000 $ (169,000) $ 29,943,000 $ (541,000)

Loans (Tables)

Loans (Tables)	3 Months Ended
	Mar. 31, 2021
Receivables [Abstract]
Schedule of Composition of Loan Portfolio	The following table shows the composition of the Company's loan portfolio as of March 31, 2021 and 2020 and at December 31, 2020: March 31, 2021 December 31, 2020 March 31, 2020 Commercial Real estate $ 469,974,000 31.0 % $ 442,121,000 29.9 % $ 382,753,000 28.5 % Construction 53,394,000 3.5 % 56,565,000 3.8 % 43,913,000 3.3 % Other 297,488,000 19.6 % 285,015,000 19.3 % 237,896,000 17.7 % Municipal 49,476,000 3.3 % 43,783,000 3.0 % 43,537,000 3.2 % Residential Term 520,317,000 34.3 % 522,070,000 35.3 % 500,971,000 37.3 % Construction 24,796,000 1.6 % 21,600,000 1.5 % 15,202,000 1.1 % Home equity line of credit 77,210,000 5.1 % 79,750,000 5.4 % 90,674,000 6.7 % Consumer 24,117,000 1.6 % 25,857,000 1.8 % 29,262,000 2.2 % Total $ 1,516,772,000 100.0 % $ 1,476,761,000 100.0 % $ 1,344,208,000 100.0 %
Schedule of Past Due Loans Aging	For all loan classes, loans over 30 days past due are considered delinquent. Information on the past-due status of loans by class of financing receivable as of March 31, 2021, is presented in the following table: 30-59 Days 60-89 Days 90+ Days All Current Total 90+ Days Commercial Real estate $ 186,000 $ — $ 283,000 $ 469,000 $ 469,505,000 $ 469,974,000 $ — Construction 47,000 — 80,000 127,000 53,267,000 53,394,000 — Other 696,000 11,000 628,000 1,335,000 296,153,000 297,488,000 9,000 Municipal — — — — 49,476,000 49,476,000 — Residential Term 1,183,000 148,000 958,000 2,289,000 518,028,000 520,317,000 71,000 Construction 111,000 — — 111,000 24,685,000 24,796,000 — Home equity line of credit 547,000 45,000 408,000 1,000,000 76,210,000 77,210,000 — Consumer 284,000 2,000 5,000 291,000 23,826,000 24,117,000 5,000 Total $ 3,054,000 $ 206,000 $ 2,362,000 $ 5,622,000 $ 1,511,150,000 $ 1,516,772,000 $ 85,000 Information on the past-due status of loans by class of financing receivable as of December 31, 2020, is presented in the following table: 30-59 Days 60-89 Days 90+ Days All Current Total 90+ Days Commercial Real estate $ 139,000 $ 190,000 $ 226,000 $ 555,000 $ 441,566,000 $ 442,121,000 $ — Construction 13,000 — 80,000 93,000 56,472,000 56,565,000 — Other 490,000 62,000 2,082,000 2,634,000 282,381,000 285,015,000 1,464,000 Municipal — — — — 43,783,000 43,783,000 — Residential Term 540,000 1,799,000 1,616,000 3,955,000 518,115,000 522,070,000 23,000 Construction — — — — 21,600,000 21,600,000 — Home equity line of credit 1,645,000 324,000 367,000 2,336,000 77,414,000 79,750,000 — Consumer 89,000 42,000 18,000 149,000 25,708,000 25,857,000 18,000 Total $ 2,916,000 $ 2,417,000 $ 4,389,000 $ 9,722,000 $ 1,467,039,000 $ 1,476,761,000 $ 1,505,000 Information on the past-due status of loans by class of financing receivable as of March 31, 2020, is presented in the following table: 30-59 Days 60-89 Days 90+ Days All Current Total 90+ Days Commercial Real estate $ 2,935,000 $ 2,000 $ 1,297,000 $ 4,234,000 $ 378,519,000 $ 382,753,000 $ 22,000 Construction 59,000 — 246,000 305,000 43,608,000 43,913,000 — Other 1,678,000 295,000 3,895,000 5,868,000 232,028,000 237,896,000 3,536,000 Municipal — — — — 43,537,000 43,537,000 — Residential Term 4,270,000 171,000 3,320,000 7,761,000 493,210,000 500,971,000 192,000 Construction — — — — 15,202,000 15,202,000 — Home equity line of credit 1,566,000 264,000 1,481,000 3,311,000 87,363,000 90,674,000 — Consumer 250,000 18,000 82,000 350,000 28,912,000 29,262,000 20,000 Total $ 10,758,000 $ 750,000 $ 10,321,000 $ 21,829,000 $ 1,322,379,000 $ 1,344,208,000 $ 3,770,000
Schedule of Modification Statuses by Portfolio Segment	Modification statuses by portfolio segment are summarized below: Commercial/Municipal Loan Modifications Units Percentage Balance Percentage Paid Off 90 15.0 % $ 14,002,000 6.0 % Subsequent Modification 30 5.0 % 30,435,000 13.0 % Still in Original Modification 11 2.0 % 1,595,000 1.0 % Out of Modification 475 78.0 % 193,212,000 80.0 % Total 606 100.0 % $ 239,244,000 100.0 % Residential Real Estate Modifications Units Percentage Balance Percentage Paid Off 41 11.0 % $ 8,269,000 16.0 % Subsequent Modification 136 38.0 % 16,595,000 32.0 % Still in Original Modification 16 4.0 % 1,853,000 4.0 % Out of Modification 170 47.0 % 24,960,000 48.0 % Total 363 100.0 % $ 51,677,000 100.0 % Consumer Loan Modifications Units Percentage Balance Percentage Paid Off 17 25.0 % $ 129,000 12.0 % Subsequent Modification 2 3.0 % 62,000 6.0 % Still in Original Modification 2 3.0 % 27,000 2.0 % Out of Modification 47 69.0 % 864,000 80.0 % Total 68 100.0 % $ 1,082,000 100.0 %
Schedule of Nonaccrual Loans	Information on nonaccrual loans as of March 31, 2021 and 2020 and at December 31, 2020 is presented in the following table: March 31, 2021 December 31, 2020 March 31, 2020 Commercial Real estate $ 748,000 $ 543,000 $ 1,748,000 Construction 89,000 89,000 246,000 Other 1,675,000 1,481,000 457,000 Municipal — — — Residential Term 3,577,000 3,593,000 5,615,000 Construction — — — Home equity line of credit 852,000 1,015,000 1,916,000 Consumer — — 66,000 Total $ 6,941,000 $ 6,721,000 $ 10,048,000
Schedule of Impaired Loans by Class of Financing Receivable	A breakdown of impaired loans by class of financing receivable as of and for the period ended March 31, 2021 is presented in the following table: For the three months ended March 31, 2021 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Recognized Interest Income With No Related Allowance Commercial Real estate $ 2,223,000 $ 2,550,000 $ — $ 2,179,000 $ 17,000 Construction 89,000 89,000 — 89,000 — Other 1,593,000 1,650,000 — 1,654,000 5,000 Municipal — — — — — Residential Term 7,183,000 8,416,000 — 7,184,000 35,000 Construction — — — — — Home equity line of credit 852,000 928,000 — 872,000 — Consumer 7,000 7,000 — 7,000 — $ 11,947,000 $ 13,640,000 $ — $ 11,985,000 $ 57,000 With an Allowance Recorded Commercial Real estate $ 978,000 $ 1,013,000 $ 174,000 $ 968,000 $ 9,000 Construction 681,000 681,000 21,000 681,000 6,000 Other 627,000 643,000 563,000 525,000 — Municipal — — — — — Residential Term 2,084,000 2,113,000 142,000 1,957,000 16,000 Construction — — — — — Home equity line of credit 23,000 23,000 — 8,000 — Consumer — — — — — $ 4,393,000 $ 4,473,000 $ 900,000 $ 4,139,000 $ 31,000 Total Commercial Real estate $ 3,201,000 $ 3,563,000 $ 174,000 $ 3,147,000 $ 26,000 Construction 770,000 770,000 21,000 770,000 6,000 Other 2,220,000 2,293,000 563,000 2,179,000 5,000 Municipal — — — — — Residential Term 9,267,000 10,529,000 142,000 9,141,000 51,000 Construction — — — — — Home equity line of credit 875,000 951,000 — 880,000 — Consumer 7,000 7,000 — 7,000 — $ 16,340,000 $ 18,113,000 $ 900,000 $ 16,124,000 $ 88,000 Substantially all interest income recognized on impaired loans for all classes of financing receivables was recognized on a cash basis as received. A breakdown of impaired loans by class of financing receivable as of and for the year ended December 31, 2020 is presented in the following table: Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Recognized Interest Income With No Related Allowance Commercial Real estate $ 2,060,000 $ 2,368,000 $ — $ 4,123,000 $ 127,000 Construction 89,000 89,000 — 358,000 — Other 1,591,000 1,623,000 — 999,000 15,000 Municipal — — — — — Residential Term 7,335,000 8,629,000 — 8,773,000 193,000 Construction — — — — — Home equity line of credit 1,015,000 1,089,000 — 1,219,000 — Consumer 8,000 8,000 — 1,000 1,000 $ 12,098,000 $ 13,806,000 $ — $ 15,473,000 $ 336,000 With an Allowance Recorded Commercial Real estate $ 969,000 $ 995,000 $ 112,000 $ 1,018,000 $ 43,000 Construction 681,000 681,000 18,000 579,000 30,000 Other 188,000 202,000 169,000 1,193,000 3,000 Municipal — — — — — Residential Term 2,079,000 2,134,000 163,000 2,073,000 65,000 Construction — — — — — Home equity line of credit 24,000 24,000 — 744,000 1,000 Consumer — — — 8,000 — $ 3,941,000 $ 4,036,000 $ 462,000 $ 5,615,000 $ 142,000 Total Commercial Real estate $ 3,029,000 $ 3,363,000 $ 112,000 $ 5,141,000 $ 170,000 Construction 770,000 770,000 18,000 937,000 30,000 Other 1,779,000 1,825,000 169,000 2,192,000 18,000 Municipal — — — — — Residential Term 9,414,000 10,763,000 163,000 10,846,000 258,000 Construction — — — — — Home equity line of credit 1,039,000 1,113,000 — 1,963,000 1,000 Consumer 8,000 8,000 — 9,000 1,000 $ 16,039,000 $ 17,842,000 $ 462,000 $ 21,088,000 $ 478,000 A breakdown of impaired loans by class of financing receivable as of and for the period ended March 31, 2020 is presented in the following table: For the three months ended March 31, 2020 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Recognized Interest Income With No Related Allowance Commercial Real estate $ 5,162,000 $ 5,421,000 $ — $ 5,157,000 $ 47,000 Construction 246,000 265,000 — 717,000 — Other 818,000 848,000 — 793,000 3,000 Municipal — — — — — Residential Term 10,378,000 12,135,000 — 10,015,000 67,000 Construction — — — — — Home equity line of credit 1,232,000 1,306,000 — 1,185,000 4,000 Consumer — — — — — $ 17,836,000 $ 19,975,000 $ — $ 17,867,000 $ 121,000 With an Allowance Recorded Commercial Real estate $ 1,061,000 $ 1,082,000 $ 230,000 $ 1,064,000 $ 8,000 Construction 701,000 701,000 3,000 234,000 10,000 Other 172,000 194,000 172,000 4,269,000 — Municipal — — — — — Residential Term 1,660,000 1,755,000 233,000 1,999,000 13,000 Construction — — — — — Home equity line of credit 996,000 1,002,000 296,000 1,124,000 — Consumer 67,000 67,000 58,000 26,000 — $ 4,657,000 $ 4,801,000 $ 992,000 $ 8,716,000 $ 31,000 Total Commercial Real estate $ 6,223,000 $ 6,503,000 $ 230,000 $ 6,221,000 $ 55,000 Construction 947,000 966,000 3,000 951,000 10,000 Other 990,000 1,042,000 172,000 5,062,000 3,000 Municipal — — — — — Residential Term 12,038,000 13,890,000 233,000 12,014,000 80,000 Construction — — — — — Home equity line of credit 2,228,000 2,308,000 296,000 2,309,000 4,000 Consumer 67,000 67,000 58,000 26,000 — $ 22,493,000 $ 24,776,000 $ 992,000 $ 26,583,000 $ 152,000
Schedule of Troubled Debt Restructurings on Financing Receivables	The following table shows TDRs by class and the specific reserve as of March 31, 2021: Number of Loans Balance Specific Reserves Commercial Real estate 13 $ 2,525,000 $ 174,000 Construction 1 681,000 21,000 Other 7 964,000 358,000 Municipal — — — Residential Term 49 6,947,000 142,000 Construction — — — Home equity line of credit 2 182,000 — Consumer 1 7,000 — 73 $ 11,306,000 $ 695,000 The following table shows TDRs by class and the specific reserve as of December 31, 2020: Number of Loans Balance Specific Reserves Commercial Real estate 13 $ 2,558,000 $ 106,000 Construction 1 681,000 18,000 Other 6 717,000 96,000 Municipal — — — Residential Term 51 7,384,000 149,000 Construction — — — Home equity line of credit 2 186,000 — Consumer 1 8,000 — 74 $ 11,534,000 $ 369,000 The following table shows TDRs by class and the specific reserve as of March 31, 2020: Number of Loans Balance Specific Reserves Commercial Real estate 16 $ 4,688,000 $ 225,000 Construction 1 701,000 3,000 Other 7 779,000 131,000 Municipal — — — Residential Term 54 8,321,000 197,000 Construction — — — Home equity line of credit 3 479,000 — Consumer — — — 81 $ 14,968,000 $ 556,000 As of March 31, 2021, 11 of the loans classified as TDRs with a total balance of $1,017,000 were more than 30 days past due. Of these loans, none had been placed on TDR status in the previous 12 months. The following table shows these TDRs by class and the associated specific reserves included in the allowance for loan losses as of March 31, 2021: Number of Loans Balance Specific Reserves Commercial Real estate 2 $ 72,000 $ 72,000 Construction — — — Other 4 419,000 92,000 Municipal — — — Residential Term 4 366,000 — Construction — — — Home equity line of credit 1 160,000 — Consumer — — — 11 $ 1,017,000 $ 164,000 As of March 31, 2020, 22 of the loans classified as TDRs with a total balance of $3,622,000 were more than 30 days past due. Of these loans, one had been placed on TDR status in the previous 12 months. The following table shows these TDRs by class and the associated specific reserves included in the allowance for loan losses as of March 31, 2020: Number of Loans Balance Specific Reserves Commercial Real estate 2 $ 618,000 $ — Construction — — — Other 4 540,000 131,000 Municipal — — — Residential Term 15 2,297,000 24,000 Construction — — — Home equity line of credit 1 167,000 — Consumer — — — 22 $ 3,622,000 $ 155,000 For the three months ended March 31, 2021, one loan was placed on TDR status. The following table shows this TDR, by class and the associated specific reserve included in the allowance for loan losses as of March 31, 2021: Number of Loans Pre-Modification Post-Modification Outstanding Specific Reserves Commercial Real estate — $ — $ — $ — Construction — — — — Other 1 262,000 262,000 262,000 Municipal — — — — Residential Term — — — — Construction — — — — Home equity line of credit — — — — Consumer — — — — 1 $ 262,000 $ 262,000 $ 262,000 For the three months ended March 31, 2020, two loans were placed on TDR status. The following table shows these TDRs by class and associated specific reserves included in the allowance for loan losses as of March 31, 2020: Number of Loans Pre-Modification Post-Modification Outstanding Specific Reserves Commercial Real estate — $ — $ — $ — Construction — — — — Other — — — — Municipal — — — — Residential Term 2 235,000 190,000 — Construction — — — — Home equity line of credit — — — — Consumer — — — — 2 $ 235,000 $ 190,000 $ —

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	3 Months Ended
	Mar. 31, 2021
Receivables [Abstract]
Allowance for Loan Losses by Class of Financing Receivable and Allowance	A breakdown of the allowance for loan losses as of March 31, 2021, December 31, 2020, and March 31, 2020, by class of financing receivable and allowance element, is presented in the following tables: As of March 31, 2021 Specific Reserves on Loans Evaluated Individually for Impairment General Reserves on Loans Based on Historical Loss Experience Reserves for Qualitative Factors Unallocated Total Reserves Commercial Real estate $ 174,000 $ 797,000 $ 4,770,000 $ — $ 5,741,000 Construction 21,000 90,000 538,000 — 649,000 Other 563,000 503,000 3,014,000 — 4,080,000 Municipal — — 185,000 — 185,000 Residential Term 142,000 259,000 2,561,000 — 2,962,000 Construction — 12,000 119,000 — 131,000 Home equity line of credit — 130,000 817,000 — 947,000 Consumer — 285,000 587,000 — 872,000 Unallocated — — — 1,027,000 1,027,000 $ 900,000 $ 2,076,000 $ 12,591,000 $ 1,027,000 $ 16,594,000 As of December 31, 2020 Specific Reserves on Loans Evaluated Individually for Impairment General Reserves on Loans Based on Historical Loss Experience Reserves for Qualitative Factors Unallocated Total Reserves Commercial Real estate $ 112,000 $ 721,000 $ 4,345,000 $ — $ 5,178,000 Construction 18,000 92,000 552,000 — 662,000 Other 169,000 465,000 2,804,000 — 3,438,000 Municipal — — 171,000 — 171,000 Residential Term 163,000 145,000 2,271,000 — 2,579,000 Construction — 6,000 96,000 — 102,000 Home equity line of credit — 151,000 1,060,000 — 1,211,000 Consumer — 282,000 496,000 — 778,000 Unallocated — — — 2,134,000 2,134,000 $ 462,000 $ 1,862,000 $ 11,795,000 $ 2,134,000 $ 16,253,000 As of March 31, 2020 Specific Reserves on Loans Evaluated Individually for Impairment General Reserves on Loans Based on Historical Loss Experience Reserves for Qualitative Factors Unallocated Total Reserves Commercial Real estate $ 230,000 $ 687,000 $ 2,945,000 $ — $ 3,862,000 Construction 3,000 80,000 341,000 — 424,000 Other 172,000 426,000 1,829,000 — 2,427,000 Municipal — — 29,000 — 29,000 Residential Term 233,000 300,000 693,000 — 1,226,000 Construction — 10,000 22,000 — 32,000 Home equity line of credit 296,000 168,000 548,000 — 1,012,000 Consumer 58,000 228,000 439,000 — 725,000 Unallocated — — — 2,121,000 2,121,000 $ 992,000 $ 1,899,000 $ 6,846,000 $ 2,121,000 $ 11,858,000
Schedule of Risk Ratings for Loans	The following table summarizes the risk ratings for the Company's commercial real estate, commercial construction, commercial other, and municipal loans as of March 31, 2021: Commercial Commercial Commercial Municipal All Risk- 1 Strong $ — $ — $ 1,716,000 $ 16,000 $ 1,732,000 2 Above Average 7,663,000 187,000 4,560,000 47,632,000 60,042,000 3 Satisfactory 94,014,000 2,837,000 107,116,000 367,000 204,334,000 4 Average 279,879,000 37,779,000 128,120,000 1,461,000 447,239,000 5 Watch 77,299,000 12,375,000 49,186,000 — 138,860,000 6 OAEM 2,261,000 — 65,000 — 2,326,000 7 Substandard 8,858,000 216,000 6,725,000 — 15,799,000 8 Doubtful — — — — — Total $ 469,974,000 $ 53,394,000 $ 297,488,000 $ 49,476,000 $ 870,332,000 The following table summarizes the risk ratings for the Company's commercial real estate, commercial construction, commercial other, and municipal loans as of December 31, 2020: Commercial Commercial Commercial Municipal All Risk- 1 Strong $ — $ — $ 2,402,000 $ 19,000 $ 2,421,000 2 Above Average 5,938,000 2,343,000 6,326,000 41,939,000 56,546,000 3 Satisfactory 91,475,000 2,889,000 104,432,000 369,000 199,165,000 4 Average 261,539,000 31,221,000 120,570,000 1,456,000 414,786,000 5 Watch 72,840,000 19,893,000 44,293,000 — 137,026,000 6 OAEM 2,754,000 — 234,000 — 2,988,000 7 Substandard 7,575,000 219,000 6,758,000 — 14,552,000 8 Doubtful — — — — — Total $ 442,121,000 $ 56,565,000 $ 285,015,000 $ 43,783,000 $ 827,484,000 The following table summarizes the risk ratings for the Company's commercial real estate, commercial construction, commercial other, and municipal loans as of March 31, 2020: Commercial Commercial Commercial Municipal All Risk- 1 Strong $ — $ — $ 4,559,000 $ 28,000 $ 4,587,000 2 Above Average 10,222,000 842,000 5,933,000 40,340,000 57,337,000 3 Satisfactory 83,905,000 1,873,000 40,255,000 372,000 126,405,000 4 Average 203,263,000 26,029,000 131,664,000 2,797,000 363,753,000 5 Watch 68,618,000 14,702,000 46,357,000 — 129,677,000 6 OAEM 1,834,000 — 2,824,000 — 4,658,000 7 Substandard 14,911,000 467,000 6,304,000 — 21,682,000 8 Doubtful — — — — — Total $ 382,753,000 $ 43,913,000 $ 237,896,000 $ 43,537,000 $ 708,099,000
Schedule of Allowance for Loan Losses Transactions	The following table presents allowance for loan losses activity by class for the three months ended March 31, 2021, and allowance for loan loss balances by class and related loan balances by class as of March 31, 2021: Commercial Municipal Residential Home Equity Line of Credit Consumer Unallocated Total Real Estate Construction Other Term Construction For the three months ended March 31, 2021 Beginning balance $ 5,178,000 $ 662,000 $ 3,438,000 $ 171,000 $ 2,579,000 $ 102,000 $ 1,211,000 $ 778,000 $ 2,134,000 $ 16,253,000 Charge offs 5,000 — 142,000 — 29,000 — — 103,000 — 279,000 Recoveries 65,000 — — — 6,000 — 1,000 23,000 — 95,000 Provision (credit) 503,000 (13,000) 784,000 14,000 406,000 29,000 (265,000) 174,000 (1,107,000) 525,000 Ending balance $ 5,741,000 $ 649,000 $ 4,080,000 $ 185,000 $ 2,962,000 $ 131,000 $ 947,000 $ 872,000 $ 1,027,000 $ 16,594,000 Allowance for loan losses as of March 31, 2021 Ending balance specifically evaluated for impairment $ 174,000 $ 21,000 $ 563,000 $ — $ 142,000 $ — $ — $ — $ — $ 900,000 Ending balance collectively evaluated for impairment $ 5,567,000 $ 628,000 $ 3,517,000 $ 185,000 $ 2,820,000 $ 131,000 $ 947,000 $ 872,000 $ 1,027,000 $ 15,694,000 Related loan balances as of March 31, 2021 Ending balance $ 469,974,000 $ 53,394,000 $ 297,488,000 $ 49,476,000 $ 520,317,000 $ 24,796,000 $ 77,210,000 $ 24,117,000 $ — $ 1,516,772,000 Ending balance specifically evaluated for impairment $ 3,201,000 $ 770,000 $ 2,220,000 $ — $ 9,267,000 $ — $ 875,000 $ 7,000 $ — $ 16,340,000 Ending balance collectively evaluated for impairment $ 466,773,000 $ 52,624,000 $ 295,268,000 $ 49,476,000 $ 511,050,000 $ 24,796,000 $ 76,335,000 $ 24,110,000 $ — $ 1,500,432,000 The following table presents allowance for loan losses activity by class for the year ended December 31, 2020 and allowance for loan loss balances by class and related loan balances by class as of December 31, 2020: Commercial Municipal Residential Home Equity Line of Credit Consumer Unallocated Total Real Estate Construction Other Term Construction For the year ended December 31, 2020 Beginning balance $ 3,742,000 $ 365,000 $ 3,329,000 $ 27,000 $ 1,024,000 $ 25,000 $ 1,078,000 $ 867,000 $ 1,182,000 $ 11,639,000 Charge offs 1,088,000 — 27,000 — 66,000 — 153,000 327,000 — 1,661,000 Recoveries — — 37,000 — 34,000 — 22,000 132,000 — 225,000 Provision 2,524,000 297,000 99,000 144,000 1,587,000 77,000 264,000 106,000 952,000 6,050,000 Ending balance $ 5,178,000 $ 662,000 $ 3,438,000 $ 171,000 $ 2,579,000 $ 102,000 $ 1,211,000 $ 778,000 $ 2,134,000 $ 16,253,000 Allowance for loan losses as of December 31, 2020 Ending balance specifically evaluated for impairment $ 112,000 $ 18,000 $ 169,000 $ — $ 163,000 $ — $ — $ — $ — $ 462,000 Ending balance collectively evaluated for impairment $ 5,066,000 $ 644,000 $ 3,269,000 $ 171,000 $ 2,416,000 $ 102,000 $ 1,211,000 $ 778,000 $ 2,134,000 $ 15,791,000 Related loan balances as of December 31, 2020 Ending balance $ 442,121,000 $ 56,565,000 $ 285,015,000 $ 43,783,000 $ 522,070,000 $ 21,600,000 $ 79,750,000 $ 25,857,000 $ — $ 1,476,761,000 Ending balance specifically evaluated for impairment $ 3,029,000 $ 770,000 $ 1,779,000 $ — $ 9,414,000 $ — $ 1,039,000 $ 8,000 $ — $ 16,039,000 Ending balance collectively evaluated for impairment $ 439,092,000 $ 55,795,000 $ 283,236,000 $ 43,783,000 $ 512,656,000 $ 21,600,000 $ 78,711,000 $ 25,849,000 $ — $ 1,460,722,000 The following table presents allowance for loan losses activity by class for the three months ended March 31, 2020, and allowance for loan loss balances by class and related loan balances by class as of March 31, 2020: Commercial Municipal Residential Home Equity Line of Credit Consumer Unallocated Total Real Estate Construction Other Term Construction For the three months ended March 31, 2020 Beginning balance $ 3,742,000 $ 365,000 $ 3,329,000 $ 27,000 $ 1,024,000 $ 25,000 $ 1,078,000 $ 867,000 $ 1,182,000 $ 11,639,000 Charge offs — — — — 2,000 — 153,000 100,000 — 255,000 Recoveries — — 20,000 — 10,000 — 1,000 43,000 — 74,000 Provision (credit) 120,000 59,000 (922,000) 2,000 194,000 7,000 86,000 (85,000) 939,000 400,000 Ending balance $ 3,862,000 $ 424,000 $ 2,427,000 $ 29,000 $ 1,226,000 $ 32,000 $ 1,012,000 $ 725,000 $ 2,121,000 $ 11,858,000 Allowance for loan losses as of March 31, 2020 Ending balance specifically evaluated for impairment $ 230,000 $ 3,000 $ 172,000 $ — $ 233,000 $ — $ 296,000 $ 58,000 $ — $ 992,000 Ending balance collectively evaluated for impairment $ 3,632,000 $ 421,000 $ 2,255,000 $ 29,000 $ 993,000 $ 32,000 $ 716,000 $ 667,000 $ 2,121,000 $ 10,866,000 Related loan balances as of March 31, 2020 Ending balance $ 382,753,000 $ 43,913,000 $ 237,896,000 $ 43,537,000 $ 500,971,000 $ 15,202,000 $ 90,674,000 $ 29,262,000 $ — $ 1,344,208,000 Ending balance specifically evaluated for impairment $ 6,223,000 $ 947,000 $ 990,000 $ — $ 12,038,000 $ — $ 2,228,000 $ 67,000 $ — $ 22,493,000 Ending balance collectively evaluated for impairment $ 376,530,000 $ 42,966,000 $ 236,906,000 $ 43,537,000 $ 488,933,000 $ 15,202,000 $ 88,446,000 $ 29,195,000 $ — $ 1,321,715,000

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2021
Share-based Payment Arrangement [Abstract]
Schedule of Nonvested Restricted Stock Units Activity	As of March 31, 2021, 184,487 shares of restricted stock had been granted under the 2010 Plan and 40,439 shares under the 2020 Plan, of which 85,740 shares remain restricted as of March 31, 2021 as detailed in the following table: Year Vesting Term Shares Remaining Term 2017 5.0 5,774 0.8 2018 4.0 706 0.8 2018 5.0 6,184 1.8 2019 3.0 16,254 0.8 2020 1.0 3,500 0.2 2020 2.0 694 0.8 2020 3.0 20,842 1.8 2021 0.4 250 0.2 2021 1.0 4,114 0.8 2021 3.0 27,422 2.8 85,740 1.8

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2021
Earnings Per Share [Abstract]
Schedule of Basic and Diluted Earnings per Share (EPS)	The following table sets forth the computation of basic and diluted earnings per share (EPS) for the three months ended March 31, 2021 and 2020: Income (Numerator) Shares (Denominator) Per-Share Amount For the three months ended March 31, 2021 Net income as reported $ 8,922,000 Basic EPS: Income available to common shareholders 8,922,000 10,888,133 $ 0.82 Effect of dilutive securities: restricted stock 85,679 Diluted EPS: Income available to common shareholders plus assumed conversions $ 8,922,000 10,973,812 $ 0.81 For the three months ended March 31, 2020 Net income as reported $ 6,495,000 Basic EPS: Income available to common shareholders 6,495,000 10,844,600 $ 0.60 Effect of dilutive securities: restricted stock 69,753 Diluted EPS: Income available to common shareholders plus assumed conversions $ 6,495,000 10,914,353 $ 0.60

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	3 Months Ended
	Mar. 31, 2021
Retirement Benefits, Description [Abstract]
Schedule of Accumulated Post-retirement Benefit Obligation and Funded Status	The following table sets forth the accumulated postretirement benefit obligation and funded status: At or for the three months ended March 31, 2021 2020 Change in benefit obligation Benefit obligation at beginning of year $ 1,523,000 $ 1,581,000 Interest cost 7,000 16,000 Benefits paid (24,000) (27,000) Benefit obligation at end of period $ 1,506,000 $ 1,570,000 Funded status Benefit obligation at end of period $ (1,506,000) $ (1,570,000) Unamortized gain (35,000) (31,000) Accrued benefit cost at end of period $ (1,541,000) $ (1,601,000)
Schedule of Net Pension Costs	The following table sets forth the net periodic pension cost: For the three months ended March 31, 2021 2020 Components of net periodic benefit cost Interest cost $ 7,000 $ 16,000 Net periodic benefit cost $ 7,000 $ 16,000
Schedule of Net Periodic Benefit Cost Not Yet Recognized	Amounts not yet reflected in net periodic benefit cost and included in accumulated other comprehensive income are as follows: March 31, December 31, 2020 March 31, Unamortized net actuarial gain $ 35,000 $ 35,000 $ 31,000 Deferred tax expense (7,000) (7,000) (7,000) Net unrecognized postretirement benefits included in accumulated other comprehensive income $ 28,000 $ 28,000 $ 24,000

Other Comprehensive Income (L_2

Other Comprehensive Income (Loss) (Tables)	3 Months Ended
	Mar. 31, 2021
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table summarizes activity in the unrealized gain or loss on available for sale securities included in other comprehensive income (loss) for the three months ended March 31, 2021 and 2020. For the three months ended March 31, 2021 2020 Balance at beginning of period $ 5,009,000 $ 3,657,000 Unrealized gains (losses) arising during the period (5,945,000) 6,109,000 Reclassification of net realized gains during the period (119,000) (752,000) Related deferred taxes 1,274,000 (1,124,000) Net change (4,790,000) 4,233,000 Balance at end of period $ 219,000 $ 7,890,000 The following table summarizes activity in the unrealized loss on securities transferred from available for sale to held to maturity included in other comprehensive income (loss) for the three months ended March 31, 2021 and 2020. For the three months ended March 31, 2021 2020 Balance at beginning of period $ (133,000) $ (182,000) Amortization of net unrealized gains 11,000 10,000 Related deferred taxes (2,000) (2,000) Net change 9,000 8,000 Balance at end of period $ (124,000) $ (174,000) The following table presents the effect of the Company's derivative financial instruments included in other comprehensive income (loss) for the three months ended March 31, 2021 and 2020. For the three months ended March 31, 2021 2020 Balance at beginning of period $ (4,932,000) $ 97,000 Unrealized gains (losses) on cash flow hedging derivatives arising during the period 4,390,000 (6,165,000) Related deferred taxes (921,000) 1,295,000 Net change 3,469,000 (4,870,000) Balance at end of period $ (1,463,000) $ (4,773,000) The following table summarizes activity in the unrealized gain or loss on postretirement benefits included in other comprehensive income (loss) for the three months ended March 31, 2021 and 2020. For the three months ended March 31, 2021 2020 Unrecognized postretirement benefits at beginning of period $ 28,000 $ 24,000 Amortization of unrecognized transition obligation — — Change in unamortized net actuarial gain (loss) — — Related deferred taxes — — Unrecognized postretirement benefits at end of period $ 28,000 $ 24,000

Financial Derivative Instrume_2

Financial Derivative Instruments (Tables)	3 Months Ended
	Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	The details of the interest rate swap agreements are as follows: March 31, 2021 December 31, 2020 March 31, 2020 Effective Date Maturity Date Variable Index Received Fixed Rate Paid Presentation on Consolidated Balance Sheet Notional Amount Fair Value Notional Amount Fair Value Notional Amount Fair Value 06/28/2016 06/28/2021 1-Month USD Libor 0.940% Other Liabilities $ 30,000,000 $ (61,000) $ 30,000,000 $ (121,000) $ 30,000,000 $ (244,000) 06/27/2016 06/27/2021 1-Month USD Libor 0.893% Other Liabilities 20,000,000 (38,000) 20,000,000 (76,000) 20,000,000 (151,000) 08/02/2019 08/02/2024 1-Month USD Libor 1.590% Other Liabilities 12,500,000 (458,000) 12,500,000 (626,000) 12,500,000 (663,000) 08/05/2019 08/05/2024 1-Month USD Libor 1.420% Other Liabilities 12,500,000 (387,000) 12,500,000 (550,000) 12,500,000 (571,000) 02/12/2020 02/12/2023 3-Month USD Libor 1.486% Other Liabilities 25,000,000 (580,000) 25,000,000 (695,000) 25,000,000 (748,000) 02/12/2020 02/12/2024 3-Month USD Libor 1.477% Other Liabilities 25,000,000 (735,000) 25,000,000 (972,000) 25,000,000 (972,000) 06/28/2021 06/28/2026 1-Month USD Libor 1.158% Other Liabilities 50,000,000 (352,000) 50,000,000 (1,872,000) 50,000,000 (1,569,000) 03/13/2020 03/13/2025 3-Month USD Libor 0.855% Other Liabilities 25,000,000 (99,000) 25,000,000 (551,000) 25,000,000 (463,000) 03/13/2020 03/13/2030 3-Month USD Libor 1.029% Other (Liabilities) Assets 20,000,000 1,071,000 20,000,000 (339,000) 20,000,000 (661,000) 04/07/2020 04/07/2023 3-Month USD Libor 0.599% Other Liabilities 20,000,000 (129,000) 20,000,000 (185,000) — — 04/07/2020 04/07/2024 3-Month USD Libor 0.643% Other Liabilities 20,000,000 (84,000) 20,000,000 (255,000) — — $260,000,000 $(1,852,000) $260,000,000 $(6,242,000) $220,000,000 $(6,042,000) At March 31, 2021, there were six customer loan swap arrangements in place, detailed below: March 31, 2021 December 31, 2020 March 31, 2020 Presentation on Consolidated Balance Sheet Number of Positions Notional Amount Fair Value Number of Positions Notional Amount Fair Value Number of Positions Notional Amount Fair Value Pay Fixed, Receive Variable Other Assets 3 $ 16,797,000 $ 1,272,000 3 $ 16,922,000 $ 37,000 — $ — $ — Pay Fixed, Receive Variable Other Liabilities 3 25,059,000 (1,334,000) 2 16,065,000 (2,603,000) 2 16,294,000 (3,280,000) 6 41,856,000 (62,000) 5 32,987,000 (2,566,000) 2 16,294,000 (3,280,000) Receive Fixed, Pay Variable Other Assets 3 25,059,000 1,334,000 2 16,065,000 2,603,000 2 16,294,000 3,280,000 Receive Fixed, Pay Variable Other Liabilities 3 16,797,000 (1,272,000) 3 16,922,000 (37,000) — — — 6 41,856,000 62,000 5 32,987,000 2,566,000 2 16,294,000 3,280,000 Total 12 $ 83,712,000 $ — 10 $ 65,974,000 $ — 4 $ 32,588,000 $ —

Mortgage Servicing Rights (Tabl

Mortgage Servicing Rights (Tables)	3 Months Ended
	Mar. 31, 2021
Transfers and Servicing [Abstract]
Reconciliation of Mortgage Servicing Assets	Mortgage servicing rights are included in other assets and detailed in the following table: March 31, December 31, March 31, Mortgage servicing rights $ 7,627,000 $ 7,299,000 $ 6,269,000 Accumulated amortization (5,136,000) (4,985,000) (4,660,000) Amortized cost 2,491,000 2,314,000 1,609,000 Impairment reserve (92,000) (358,000) — Carrying value $ 2,399,000 $ 1,956,000 $ 1,609,000

Certificates of Deposit (Tables

Certificates of Deposit (Tables)	3 Months Ended
	Mar. 31, 2021
Deposits [Abstract]
Schedule of Certificates of Deposit	The following table represents the breakdown of certificates of deposit at March 31, 2021 and 2020, and at December 31, 2020: March 31, 2021 December 31, 2020 March 31, 2020 Certificates of deposit < $100,000 $ 230,290,000 $ 246,875,000 $ 274,621,000 Certificates $100,000 to $250,000 343,805,000 295,672,000 364,530,000 Certificates $250,000 and over 60,235,000 63,038,000 71,787,000 $ 634,330,000 $ 605,585,000 $ 710,938,000

Fair Value (Tables)

Fair Value (Tables)	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Schedule of Assets and Liabilities Measured on Recurring Basis Measured at Fair Value	The following tables present the balances of assets and liabilities that were measured at fair value on a recurring basis as of March 31, 2021, December 31, 2020 and March 31, 2020. At March 31, 2021 Level 1 Level 2 Level 3 Total Securities available for sale U.S. Government-sponsored agencies $ — $ 21,485,000 $ — $ 21,485,000 Mortgage-backed securities — 227,914,000 — 227,914,000 State and political subdivisions — 37,558,000 — 37,558,000 Asset-backed securities — 7,580,000 — 7,580,000 Total securities available for sale — 294,537,000 — 294,537,000 Interest rate swap agreements — 1,071,000 — 1,071,000 Customer loan interest swap agreements — 2,606,000 — 2,606,000 Total interest rate swap agreements — 3,677,000 — 3,677,000 Total assets $ — $ 298,214,000 $ — $ 298,214,000 At March 31, 2021 Level 1 Level 2 Level 3 Total Interest rate swap agreements $ — $ 2,923,000 $ — $ 2,923,000 Customer loan interest swap agreements — 2,606,000 — 2,606,000 Total liabilities $ — $ 5,529,000 $ — $ 5,529,000 At December 31, 2020 Level 1 Level 2 Level 3 Total Securities available for sale U.S. Government-sponsored agencies $ — $ 22,730,000 $ — $ 22,730,000 Mortgage-backed securities — 243,406,000 — 243,406,000 State and political subdivisions — 39,474,000 — 39,474,000 Asset-backed securities — 7,766,000 — 7,766,000 Total securities available for sale — 313,376,000 — 313,376,000 Customer loan interest swap agreements — 2,640,000 — 2,640,000 Total interest rate swap agreements — 2,640,000 — 2,640,000 Total assets $ — $ 316,016,000 $ — $ 316,016,000 At December 31, 2020 Level 1 Level 2 Level 3 Total Interest rate swap agreements $ — $ 6,242,000 $ — $ 6,242,000 Customer loan interest swap agreements — 2,640,000 — 2,640,000 Total liabilities $ — $ 8,882,000 $ — $ 8,882,000 At March 31, 2020 Level 1 Level 2 Level 3 Total Securities available for sale U.S. Treasury and agency $ — $ 7,552,000 $ — $ 7,552,000 Mortgage-backed securities — 285,152,000 — 285,152,000 State and political subdivisions — 20,224,000 — 20,224,000 Total securities available for sale — 312,928,000 — 312,928,000 Customer loan interest swap agreements — 3,280,000 — 3,280,000 Total interest swap agreements — 3,280,000 — 3,280,000 Total assets $ — $ 316,208,000 $ — $ 316,208,000 At March 31, 2020 Level 1 Level 2 Level 3 Total Interest rate swap agreements $ — $ 6,042,000 $ — $ 6,042,000 Customer loan interest swap agreements — 3,280,000 — 3,280,000 Total liabilities $ — $ 9,322,000 $ — $ 9,322,000
Schedule of Assets Measured on Nonrecurring Basis Measured at Fair Value	The following tables include assets measured at fair value on a nonrecurring basis that have had a fair value adjustment since their initial recognition. Mortgage servicing rights are presented net of an impairment reserve of $92,000 at March 31, 2021 and $358,000 at December 31, 2020. Other real estate owned is presented net of an allowance of $45,000 at both March 31, 2021 and December 31, 2020. There was no allowance for other real estate owned at March 31, 2020. Only collateral-dependent impaired loans with a related specific allowance for loan losses or a partial charge off are included in impaired loans for purposes of fair value disclosures. Impaired loans below are presented net of specific allowances of $641,000, $304,000 and $706,000 at March 31, 2021, December 31, 2020, and March 31, 2020, respectively. At March 31, 2021 Level 1 Level 2 Level 3 Total Mortgage servicing rights $ — $ 2,608,000 $ — $ 2,608,000 Other real estate owned — 401,000 — 401,000 Impaired loans — 234,000 — 234,000 Total assets $ — $ 3,243,000 $ — $ 3,243,000 At December 31, 2020 Level 1 Level 2 Level 3 Total Mortgage servicing rights $ — $ 1,985,000 $ — $ 1,985,000 Other real estate owned — 908,000 — 908,000 Impaired loans — 794,000 — 794,000 Total assets $ — $ 3,687,000 $ — $ 3,687,000 At March 31, 2020 Level 1 Level 2 Level 3 Total Other real estate owned $ — $ 316,000 $ — $ 316,000 Impaired loans — 1,051,000 — 1,051,000 Total assets $ — $ 1,367,000 $ — $ 1,367,000
Schedule of Estimated Fair Value of Financial Instruments	The carrying amount and estimated fair values for financial instruments as of March 31, 2021 were as follows: Carrying value Estimated fair value Level 1 Level 2 Level 3 Financial assets Securities to be held to maturity $ 385,352,000 $ 388,836,000 $ — $ 388,836,000 $ — Loans (net of allowance for loan losses) Commercial Real estate 463,854,000 459,158,000 — — 459,158,000 Construction 52,702,000 52,168,000 — — 52,168,000 Other 293,139,000 289,541,000 — 50,000 289,491,000 Municipal 49,279,000 48,698,000 — — 48,698,000 Residential Term 517,160,000 526,134,000 — 184,000 525,950,000 Construction 24,656,000 25,028,000 — — 25,028,000 Home equity line of credit 76,201,000 74,813,000 — — 74,813,000 Consumer 23,187,000 21,304,000 — — 21,304,000 Total loans 1,500,178,000 1,496,844,000 — 234,000 1,496,610,000 Mortgage servicing rights 2,399,000 2,608,000 — 2,608,000 — Financial liabilities Local certificates of deposit $ 246,976,000 $ 249,458,000 $ — $ 249,458,000 $ — National certificates of deposit 387,354,000 359,899,000 — 359,899,000 — Total certificates of deposits 634,330,000 609,357,000 — 609,357,000 — Repurchase agreements 71,952,000 70,105,000 — 70,105,000 — Federal Home Loan Bank and Federal Reserve Bank borrowings 157,696,000 159,184,000 — 159,184,000 — Total borrowed funds 229,648,000 229,289,000 — 229,289,000 — The carrying amounts and estimated fair values for financial instruments as of December 31, 2020 were as follows: Carrying value Estimated fair value Level 1 Level 2 Level 3 Financial assets Securities to be held to maturity $ 365,613,000 $ 377,134,000 $ — $ 377,134,000 $ — Loans (net of allowance for loan losses) Commercial Real estate 436,161,000 440,735,000 — 347,000 440,388,000 Construction 55,803,000 56,388,000 — — 56,388,000 Other 281,057,000 279,501,000 — 5,000 279,496,000 Municipal 43,586,000 44,440,000 — — 44,440,000 Residential Term 519,101,000 533,059,000 — 442,000 532,617,000 Construction 21,483,000 21,890,000 — — 21,890,000 Home equity line of credit 78,356,000 77,177,000 — — 77,177,000 Consumer 24,961,000 23,502,000 — — 23,502,000 Total loans 1,460,508,000 1,476,692,000 — 794,000 1,475,898,000 Mortgage servicing rights 1,956,000 1,985,000 — 1,985,000 — Financial liabilities Local certificates of deposit $ 250,264,000 $ 253,892,000 $ — $ 253,892,000 $ — National certificates of deposit 355,321,000 359,899,000 — 359,899,000 — Total deposits 605,585,000 613,791,000 — 613,791,000 — Repurchase agreements 69,340,000 69,497,000 — 69,497,000 — Federal Home Loan Bank advances 192,698,000 194,469,000 — 194,469,000 — Total borrowed funds 262,038,000 263,966,000 — 263,966,000 — The carrying amount and estimated fair values for financial instruments as of March 31, 2020 were as follows: Carrying value Estimated fair value Level 1 Level 2 Level 3 Financial assets Securities to be held to maturity $ 341,592,000 $ 349,248,000 $ — $ 349,248,000 $ — Loans (net of allowance for loan losses) Commercial Real estate 378,049,000 371,916,000 — 7,000 371,909,000 Construction 43,397,000 42,693,000 — — 42,693,000 Other 234,940,000 233,411,000 — — 233,411,000 Municipal 43,502,000 41,909,000 — — 41,909,000 Residential Term 499,478,000 503,098,000 — 335,000 502,763,000 Construction 15,163,000 15,304,000 — — 15,304,000 Home equity line of credit 89,442,000 89,407,000 — 700,000 88,707,000 Consumer 28,379,000 26,933,000 — 9,000 26,924,000 Total loans 1,332,350,000 1,324,671,000 — 1,051,000 1,323,620,000 Mortgage servicing rights 1,609,000 2,126,000 — 2,126,000 — Financial liabilities Local certificates of deposit $ 290,440,000 $ 290,886,000 $ — $ 290,886,000 $ — National certificates of deposit 420,498,000 429,110,000 — 429,110,000 — Total certificates of deposits 710,938,000 719,996,000 — 719,996,000 — Repurchase agreements 37,937,000 37,494,000 — 37,494,000 — Federal Home Loan Bank advances 210,103,000 211,228,000 — 211,228,000 — Total borrowed funds 248,040,000 248,722,000 — 248,722,000 —

Investment Securities - Summary

Investment Securities - Summary of Amortized Cost and Estimated Fair Value, AFS (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 294,260	$ 307,036	$ 302,941
Unrealized Gains	5,404	7,272	10,176
Unrealized Losses	(5,127)	(932)	(189)
Fair Value (Estimated)	294,537	313,376	312,928
U.S. Government-sponsored agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	23,045	23,045	7,500
Unrealized Gains	0	0	52
Unrealized Losses	(1,560)	(315)	0
Fair Value (Estimated)	21,485	22,730	7,552
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	227,089	238,516	276,235
Unrealized Gains	4,109	5,507	9,106
Unrealized Losses	(3,284)	(617)	(189)
Fair Value (Estimated)	227,914	243,406	285,152
State and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	36,663	37,752	19,206
Unrealized Gains	1,178	1,722	1,018
Unrealized Losses	(283)	0	0
Fair Value (Estimated)	37,558	39,474	$ 20,224
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	7,463	7,723
Unrealized Gains	117	43
Unrealized Losses	0	0
Fair Value (Estimated)	$ 7,580	$ 7,766

Investment Securities - Summa_2

Investment Securities - Summary of Amortized Cost and Estimated Fair Value, HTM and Restricted Equity Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Amortized Cost	$ 385,352	$ 365,613	$ 341,592
Unrealized Gains	8,317	11,739	8,008
Unrealized Losses	(4,833)	(218)	(352)
Fair Value (Estimated)	388,836	377,134	349,248
Equity Securities, Restricted [Abstract]
Federal Home Loan Bank Stock	9,068	9,508	8,957
Federal Reserve Bank Stock	1,037	1,037	1,037
Restricted equity securities	10,105	10,545	9,994
U.S. Government-sponsored agencies
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Amortized Cost	35,600	44,149	35,981
Unrealized Gains	55	143	207
Unrealized Losses	(2,041)	(18)	0
Fair Value (Estimated)	33,614	44,274	36,188
Mortgage-backed securities
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Amortized Cost	76,365	53,594	51,142
Unrealized Gains	480	736	1,392
Unrealized Losses	(2,181)	(195)	(7)
Fair Value (Estimated)	74,664	54,135	52,527
State and political subdivisions
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Amortized Cost	251,137	245,620	239,719
Unrealized Gains	7,435	10,427	5,819
Unrealized Losses	(525)	(3)	(345)
Fair Value (Estimated)	258,047	256,044	245,193
Corporate securities
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Amortized Cost	22,250	22,250	14,750
Unrealized Gains	347	433	590
Unrealized Losses	(86)	(2)	0
Fair Value (Estimated)	$ 22,511	$ 22,681	$ 15,340

Investment Securities - Summa_3

Investment Securities - Summary of Contractual Maturities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Securities available for sale
Amortized Cost, Due in 1 year or less	$ 2,544	$ 117	$ 66
Fair Value (Estimated), Due in 1 year or less	2,516	120	66
Amortized Cost, Due in 1 to 5 years	12,994	17,718	25,221
Fair Value (Estimated), Due in 1 to 5 years	13,172	17,915	26,159
Amortized Cost, Due in 5 to 10 years	50,007	49,697	62,462
Fair Value (Estimated), Due in 1 to 5 years	50,587	51,001	65,032
Amortized Cost, Due after 10 years	228,715	239,504	215,192
Fair Value (Estimated), Due after 10 years	228,262	244,340	221,671
Amortized Cost	294,260	307,036	302,941
Securities available for sale, Fair Value (Estimated)	294,537	313,376	312,928
Securities to be held to maturity
Amortized Cost, Due in 1 year or less	3,926	3,607	1,331
Fair Value (Estimated), Due in 1 year or less	3,956	3,641	1,337
Amortized Cost, Due in 1 to 5 years	26,992	30,867	27,854
Fair Value (Estimated), Due in 1 to 5 years	27,613	31,792	28,361
Amortized Cost, Due in 5 to 10 years	173,295	183,679	184,037
Fair Value (Estimated), Due in 1 to 5 years	178,069	190,153	189,214
Amortized Cost, Due after 10 years	181,139	147,460	128,370
Fair Value (Estimated), Due after 10 years	179,198	151,548	130,336
Amortized Cost	385,352	365,613	341,592
Securities to be held to maturity, Fair Value (Estimated)	$ 388,836	$ 377,134	$ 349,248

Investment Securities - Narrati

Investment Securities - Narrative (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2021USD ($)statesecurity	Mar. 31, 2020USD ($)security	Dec. 31, 2020USD ($)security	Sep. 30, 2014USD ($)
Debt Securities, Available-for-sale [Line Items]
Number of securities temporarily impaired (security) | security	140	70	50
Number of securities temporarily impaired for twelve months or more (security) | security	10	14	10
Period of temporary impairment	12 months	12 months	12 months
Amortized cost of securities transferred				$ 89,780,000
Fair value of securities transferred				89,757,000
Net unrealized loss, net of taxes on transferred securities				$ 15,000
Unamortized balance of net unrealized losses	$ 124,000	$ 174,000	$ 133,000
Number of states | state	6
FHLB stock investment	$ 9,068,000	8,957,000	9,508,000
Impairment losses	0
Other equity securities
Debt Securities, Available-for-sale [Line Items]
Securities pledged as collateral	$ 291,990,000	$ 208,376,000	$ 297,326,000

Investment Securities - Securit

Investment Securities - Securities Gains and Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Proceeds from sales of securities	$ 1,214	$ 68,620
Gross realized gains	119	1,098
Gross realized losses	0	(346)
Net gain	119	752
Related income taxes	$ 25	$ 158

Investment Securities - Secur_2

Investment Securities - Securities Temporarily Impaired (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Fair Value (Estimated) (Less than 12 months)	$ 264,229	$ 99,070	$ 22,519
Unrealized Losses (Less than 12 months)	(9,830)	(1,062)	(372)
Fair Value (Estimated) (12 months or more)	3,744	3,878	7,424
Unrealized Losses (12 months or more)	(130)	(88)	(169)
Fair Value (Estimated)	267,973	102,948	29,943
Unrealized Losses	(9,960)	(1,150)	(541)
U.S. Government-sponsored agencies
Debt Securities, Available-for-sale [Line Items]
Fair Value (Estimated) (Less than 12 months)	51,894	30,212
Unrealized Losses (Less than 12 months)	(3,601)	(333)
Fair Value (Estimated) (12 months or more)	0	0
Unrealized Losses (12 months or more)	0	0
Fair Value (Estimated)	51,894	30,212
Unrealized Losses	(3,601)	(333)
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Fair Value (Estimated) (Less than 12 months)	180,138	65,505	2,963
Unrealized Losses (Less than 12 months)	(5,335)	(724)	(27)
Fair Value (Estimated) (12 months or more)	3,744	3,878	7,424
Unrealized Losses (12 months or more)	(130)	(88)	(169)
Fair Value (Estimated)	183,882	69,383	10,387
Unrealized Losses	(5,465)	(812)	(196)
State and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Fair Value (Estimated) (Less than 12 months)	28,783	855	19,556
Unrealized Losses (Less than 12 months)	(808)	(3)	(345)
Fair Value (Estimated) (12 months or more)	0	0	0
Unrealized Losses (12 months or more)	0	0	0
Fair Value (Estimated)	28,783	855	19,556
Unrealized Losses	(808)	(3)	$ (345)
Corporate securities
Debt Securities, Available-for-sale [Line Items]
Fair Value (Estimated) (Less than 12 months)	3,414	2,498
Unrealized Losses (Less than 12 months)	(86)	(2)
Fair Value (Estimated) (12 months or more)	0	0
Unrealized Losses (12 months or more)	0	0
Fair Value (Estimated)	3,414	2,498
Unrealized Losses	$ (86)	$ (2)

Loans - Loan Portfolio (Details

Loans - Loan Portfolio (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Schedule of Financing Receivables [Line Items]
Loans	$ 1,516,772	$ 1,476,761	$ 1,344,208
Percentage of loans receivable, by type	100.00%	100.00%	100.00%
Commercial |    Real estate
Schedule of Financing Receivables [Line Items]
Loans	$ 469,974	$ 442,121	$ 382,753
Percentage of loans receivable, by type	31.00%	29.90%	28.50%
Commercial |    Construction
Schedule of Financing Receivables [Line Items]
Loans	$ 53,394	$ 56,565	$ 43,913
Percentage of loans receivable, by type	3.50%	3.80%	3.30%
Commercial |    Other
Schedule of Financing Receivables [Line Items]
Loans	$ 297,488	$ 285,015	$ 237,896
Percentage of loans receivable, by type	19.60%	19.30%	17.70%
Municipal
Schedule of Financing Receivables [Line Items]
Loans	$ 49,476	$ 43,783	$ 43,537
Percentage of loans receivable, by type	3.30%	3.00%	3.20%
Residential |    Construction
Schedule of Financing Receivables [Line Items]
Loans	$ 24,796	$ 21,600	$ 15,202
Percentage of loans receivable, by type	1.60%	1.50%	1.10%
Residential |    Term
Schedule of Financing Receivables [Line Items]
Loans	$ 520,317	$ 522,070	$ 500,971
Percentage of loans receivable, by type	34.30%	35.30%	37.30%
Home equity line of credit
Schedule of Financing Receivables [Line Items]
Loans	$ 77,210	$ 79,750	$ 90,674
Percentage of loans receivable, by type	5.10%	5.40%	6.70%
Consumer
Schedule of Financing Receivables [Line Items]
Loans	$ 24,117	$ 25,857	$ 29,262
Percentage of loans receivable, by type	1.60%	1.80%	2.20%

Loans - Narrative (Details)

Loans - Narrative (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2021USD ($)loan	Mar. 31, 2020USD ($)loan	Dec. 31, 2020USD ($)loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net deferred loan costs	$ 5,328	$ 7,551	$ 6,931
Loans used to collateralize borrowings from the Federal Home Loan Bank of Boston	362,271	401,555	378,183
Commercial, construction and home equity loans used to collateralize unused line of credit at the Federal Reserve Bank of Boston	$ 275,993	$ 260,703	$ 259,599
Number of loans | loan	73	81	74
Loans	$ 1,516,772	$ 1,344,208	$ 1,476,761
Percentage of loans receivable, by type	100.00%	100.00%	100.00%
TDR recorded investment	$ 11,306	$ 14,968	$ 11,534
Number of loans | loan	11	22
TDR recorded investment more than 30 days past due	$ 1,017	$ 3,622
Number of loans placed on TDR status in previous 12 months | loan	0	1
Number of loans | loan	1	2
Number of TDR loans involved in bankruptcy (loan) | loan	6
Loans classified as TDRs that are involved in bankruptcy	$ 708
Number of loans classified as TDRs that were on non-accrual status | loan	21
Loans classified as TDRs that were on non-accrual status	$ 1,908
Number of loans classified as TDRs that are involved in foreclosure | loan	1
Loans classified as TDRs that are involved in foreclosure	$ 92
Number of mortgage loans in the process of foreclosure | loan	14	15
Mortgage loans in the process of foreclosure	$ 1,067	$ 2,284
Unallocated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 0	$ 0	$ 0
Number of days past due	30 days	30 days
Original or Subsequent Modification | Exemption from Troubled Debt Restructure Designation, CARES Act
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 50,600
Percentage of loans receivable, by type	3.30%
Small Business Administration (SBA), CARES Act, Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans | loan	1,037
Loans	$ 292,003
Percentage of loans receivable, by type	20.00%

Loans - Past-due Status of Loan

Loans - Past-due Status of Loans by Class (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Schedule of Financing Receivables [Line Items]
All Past Due	$ 5,622	$ 9,722	$ 21,829
Current	1,511,150	1,467,039	1,322,379
Loans	1,516,772	1,476,761	1,344,208
90 Days or More & Accruing	85	1,505	3,770
30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	3,054	2,916	10,758
60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	206	2,417	750
90 Days or More Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	2,362	4,389	10,321
Commercial |    Real estate
Schedule of Financing Receivables [Line Items]
All Past Due	469	555	4,234
Current	469,505	441,566	378,519
Loans	469,974	442,121	382,753
90 Days or More & Accruing	0	0	22
Commercial |    Real estate | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	186	139	2,935
Commercial |    Real estate | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	0	190	2
Commercial |    Real estate | 90 Days or More Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	283	226	1,297
Commercial |    Construction
Schedule of Financing Receivables [Line Items]
All Past Due	127	93	305
Current	53,267	56,472	43,608
Loans	53,394	56,565	43,913
90 Days or More & Accruing	0	0	0
Commercial |    Construction | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	47	13	59
Commercial |    Construction | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	0	0	0
Commercial |    Construction | 90 Days or More Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	80	80	246
Commercial |    Other
Schedule of Financing Receivables [Line Items]
All Past Due	1,335	2,634	5,868
Current	296,153	282,381	232,028
Loans	297,488	285,015	237,896
90 Days or More & Accruing	9	1,464	3,536
Commercial |    Other | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	696	490	1,678
Commercial |    Other | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	11	62	295
Commercial |    Other | 90 Days or More Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	628	2,082	3,895
Municipal
Schedule of Financing Receivables [Line Items]
All Past Due	0	0	0
Current	49,476	43,783	43,537
Loans	49,476	43,783	43,537
90 Days or More & Accruing	0	0	0
Municipal | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	0	0	0
Municipal | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	0	0	0
Municipal | 90 Days or More Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	0	0	0
Residential |    Construction
Schedule of Financing Receivables [Line Items]
All Past Due	111	0	0
Current	24,685	21,600	15,202
Loans	24,796	21,600	15,202
90 Days or More & Accruing	0	0	0
Residential |    Construction | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	111	0	0
Residential |    Construction | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	0	0	0
Residential |    Construction | 90 Days or More Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	0	0	0
Residential |    Term
Schedule of Financing Receivables [Line Items]
All Past Due	2,289	3,955	7,761
Current	518,028	518,115	493,210
Loans	520,317	522,070	500,971
90 Days or More & Accruing	71	23	192
Residential |    Term | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	1,183	540	4,270
Residential |    Term | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	148	1,799	171
Residential |    Term | 90 Days or More Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	958	1,616	3,320
Home equity line of credit
Schedule of Financing Receivables [Line Items]
All Past Due	1,000	2,336	3,311
Current	76,210	77,414	87,363
Loans	77,210	79,750	90,674
90 Days or More & Accruing	0	0	0
Home equity line of credit | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	547	1,645	1,566
Home equity line of credit | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	45	324	264
Home equity line of credit | 90 Days or More Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	408	367	1,481
Consumer
Schedule of Financing Receivables [Line Items]
All Past Due	291	149	350
Current	23,826	25,708	28,912
Loans	24,117	25,857	29,262
90 Days or More & Accruing	5	18	20
Consumer | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	284	89	250
Consumer | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	2	42	18
Consumer | 90 Days or More Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	$ 5	$ 18	$ 82

Loans - Modification Statuses b

Loans - Modification Statuses by Portfolio Segment (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2021USD ($)loan	Mar. 31, 2020USD ($)loan	Dec. 31, 2020USD ($)loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Units | loan	73	81	74
Percentage of loans receivable, by type	100.00%	100.00%	100.00%
Balance | $	$ 1,516,772	$ 1,344,208	$ 1,476,761
Commercial/Municipal Loan Modifications | Exemption from Troubled Debt Restructure Designation, CARES Act
Accounts, Notes, Loans and Financing Receivable [Line Items]
Units | loan	606
Percentage of loans receivable, by type	100.00%
Balance | $	$ 239,244
Percentage of balance	100.00%
Commercial/Municipal Loan Modifications | Paid Off | Exemption from Troubled Debt Restructure Designation, CARES Act
Accounts, Notes, Loans and Financing Receivable [Line Items]
Units | loan	90
Percentage of loans receivable, by type	15.00%
Balance | $	$ 14,002
Percentage of balance	6.00%
Commercial/Municipal Loan Modifications | Subsequent Modification | Exemption from Troubled Debt Restructure Designation, CARES Act
Accounts, Notes, Loans and Financing Receivable [Line Items]
Units | loan	30
Percentage of loans receivable, by type	5.00%
Balance | $	$ 30,435
Percentage of balance	13.00%
Commercial/Municipal Loan Modifications | Still in Original Modification | Exemption from Troubled Debt Restructure Designation, CARES Act
Accounts, Notes, Loans and Financing Receivable [Line Items]
Units | loan	11
Percentage of loans receivable, by type	2.00%
Balance | $	$ 1,595
Percentage of balance	1.00%
Commercial/Municipal Loan Modifications | Out of Modification | Exemption from Troubled Debt Restructure Designation, CARES Act
Accounts, Notes, Loans and Financing Receivable [Line Items]
Units | loan	475
Percentage of loans receivable, by type	78.00%
Balance | $	$ 193,212
Percentage of balance	80.00%
Residential Real Estate Modifications | Exemption from Troubled Debt Restructure Designation, CARES Act
Accounts, Notes, Loans and Financing Receivable [Line Items]
Units | loan	363
Percentage of loans receivable, by type	100.00%
Balance | $	$ 51,677
Percentage of balance	100.00%
Residential Real Estate Modifications | Paid Off | Exemption from Troubled Debt Restructure Designation, CARES Act
Accounts, Notes, Loans and Financing Receivable [Line Items]
Units | loan	41
Percentage of loans receivable, by type	11.00%
Balance | $	$ 8,269
Percentage of balance	16.00%
Residential Real Estate Modifications | Subsequent Modification | Exemption from Troubled Debt Restructure Designation, CARES Act
Accounts, Notes, Loans and Financing Receivable [Line Items]
Units | loan	136
Percentage of loans receivable, by type	38.00%
Balance | $	$ 16,595
Percentage of balance	32.00%
Residential Real Estate Modifications | Still in Original Modification | Exemption from Troubled Debt Restructure Designation, CARES Act
Accounts, Notes, Loans and Financing Receivable [Line Items]
Units | loan	16
Percentage of loans receivable, by type	4.00%
Balance | $	$ 1,853
Percentage of balance	4.00%
Residential Real Estate Modifications | Out of Modification | Exemption from Troubled Debt Restructure Designation, CARES Act
Accounts, Notes, Loans and Financing Receivable [Line Items]
Units | loan	170
Percentage of loans receivable, by type	47.00%
Balance | $	$ 24,960
Percentage of balance	48.00%
Consumer Loan Modifications
Accounts, Notes, Loans and Financing Receivable [Line Items]
Units | loan	1	0	1
Percentage of loans receivable, by type	1.60%	2.20%	1.80%
Balance | $	$ 24,117	$ 29,262	$ 25,857
Consumer Loan Modifications | Exemption from Troubled Debt Restructure Designation, CARES Act
Accounts, Notes, Loans and Financing Receivable [Line Items]
Units | loan	68
Percentage of loans receivable, by type	100.00%
Balance | $	$ 1,082
Percentage of balance	100.00%
Consumer Loan Modifications | Paid Off | Exemption from Troubled Debt Restructure Designation, CARES Act
Accounts, Notes, Loans and Financing Receivable [Line Items]
Units | loan	17
Percentage of loans receivable, by type	25.00%
Balance | $	$ 129
Percentage of balance	12.00%
Consumer Loan Modifications | Subsequent Modification | Exemption from Troubled Debt Restructure Designation, CARES Act
Accounts, Notes, Loans and Financing Receivable [Line Items]
Units | loan	2
Percentage of loans receivable, by type	3.00%
Balance | $	$ 62
Percentage of balance	6.00%
Consumer Loan Modifications | Still in Original Modification | Exemption from Troubled Debt Restructure Designation, CARES Act
Accounts, Notes, Loans and Financing Receivable [Line Items]
Units | loan	2
Percentage of loans receivable, by type	3.00%
Balance | $	$ 27
Percentage of balance	2.00%
Consumer Loan Modifications | Out of Modification | Exemption from Troubled Debt Restructure Designation, CARES Act
Accounts, Notes, Loans and Financing Receivable [Line Items]
Units | loan	47
Percentage of loans receivable, by type	69.00%
Balance | $	$ 864
Percentage of balance	80.00%

Loans - Nonaccrual Loans (Detai

Loans - Nonaccrual Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	$ 6,941	$ 6,721	$ 10,048
Commercial |    Real estate
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	748	543	1,748
Commercial |    Construction
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	89	89	246
Commercial |    Other
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	1,675	1,481	457
Municipal
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	0	0	0
Residential |    Construction
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	0	0	0
Residential |    Term
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	3,577	3,593	5,615
Home equity line of credit
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	852	1,015	1,916
Consumer
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	$ 0	$ 0	$ 66

Loans - Impaired Loans by Class

Loans - Impaired Loans by Class (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded investment, with no related allowance	$ 11,947	$ 17,836	$ 12,098
Recorded investment, with related allowance	4,393	4,657	3,941
Recorded Investment	16,340	22,493	16,039
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no related allowance	13,640	19,975	13,806
Unpaid principal balance with related allowance	4,473	4,801	4,036
Unpaid Principal Balance	18,113	24,776	17,842
Related Allowance	900	992	462
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment, with no related allowance	11,985	17,867	15,473
Average recorded investment, with related allowance	4,139	8,716	5,615
Average Recorded Investment	16,124	26,583	21,088
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized interest income, with no related allowance	57	121	336
Recognized interest income, with related allowance	31	31	142
Recognized Interest Income	88	152	478
Commercial |    Real estate
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded investment, with no related allowance	2,223	5,162	2,060
Recorded investment, with related allowance	978	1,061	969
Recorded Investment	3,201	6,223	3,029
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no related allowance	2,550	5,421	2,368
Unpaid principal balance with related allowance	1,013	1,082	995
Unpaid Principal Balance	3,563	6,503	3,363
Related Allowance	174	230	112
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment, with no related allowance	2,179	5,157	4,123
Average recorded investment, with related allowance	968	1,064	1,018
Average Recorded Investment	3,147	6,221	5,141
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized interest income, with no related allowance	17	47	127
Recognized interest income, with related allowance	9	8	43
Recognized Interest Income	26	55	170
Commercial |    Construction
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded investment, with no related allowance	89	246	89
Recorded investment, with related allowance	681	701	681
Recorded Investment	770	947	770
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no related allowance	89	265	89
Unpaid principal balance with related allowance	681	701	681
Unpaid Principal Balance	770	966	770
Related Allowance	21	3	18
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment, with no related allowance	89	717	358
Average recorded investment, with related allowance	681	234	579
Average Recorded Investment	770	951	937
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized interest income, with no related allowance	0	0	0
Recognized interest income, with related allowance	6	10	30
Recognized Interest Income	6	10	30
Commercial |    Other
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded investment, with no related allowance	1,593	818	1,591
Recorded investment, with related allowance	627	172	188
Recorded Investment	2,220	990	1,779
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no related allowance	1,650	848	1,623
Unpaid principal balance with related allowance	643	194	202
Unpaid Principal Balance	2,293	1,042	1,825
Related Allowance	563	172	169
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment, with no related allowance	1,654	793	999
Average recorded investment, with related allowance	525	4,269	1,193
Average Recorded Investment	2,179	5,062	2,192
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized interest income, with no related allowance	5	3	15
Recognized interest income, with related allowance	0	0	3
Recognized Interest Income	5	3	18
Municipal
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded investment, with no related allowance	0	0	0
Recorded investment, with related allowance	0	0	0
Recorded Investment	0	0	0
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no related allowance	0	0	0
Unpaid principal balance with related allowance	0	0	0
Unpaid Principal Balance	0	0	0
Related Allowance	0	0	0
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment, with no related allowance	0	0	0
Average recorded investment, with related allowance	0	0	0
Average Recorded Investment	0	0	0
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized interest income, with no related allowance	0	0	0
Recognized interest income, with related allowance	0	0	0
Recognized Interest Income	0	0	0
Residential |    Construction
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded investment, with no related allowance	0	0	0
Recorded investment, with related allowance	0	0	0
Recorded Investment	0	0	0
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no related allowance	0	0	0
Unpaid principal balance with related allowance	0	0	0
Unpaid Principal Balance	0	0	0
Related Allowance	0	0	0
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment, with no related allowance	0	0	0
Average recorded investment, with related allowance	0	0	0
Average Recorded Investment	0	0	0
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized interest income, with no related allowance	0	0	0
Recognized interest income, with related allowance	0	0	0
Recognized Interest Income	0	0	0
Residential |    Term
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded investment, with no related allowance	7,183	10,378	7,335
Recorded investment, with related allowance	2,084	1,660	2,079
Recorded Investment	9,267	12,038	9,414
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no related allowance	8,416	12,135	8,629
Unpaid principal balance with related allowance	2,113	1,755	2,134
Unpaid Principal Balance	10,529	13,890	10,763
Related Allowance	142	233	163
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment, with no related allowance	7,184	10,015	8,773
Average recorded investment, with related allowance	1,957	1,999	2,073
Average Recorded Investment	9,141	12,014	10,846
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized interest income, with no related allowance	35	67	193
Recognized interest income, with related allowance	16	13	65
Recognized Interest Income	51	80	258
Home equity line of credit
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded investment, with no related allowance	852	1,232	1,015
Recorded investment, with related allowance	23	996	24
Recorded Investment	875	2,228	1,039
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no related allowance	928	1,306	1,089
Unpaid principal balance with related allowance	23	1,002	24
Unpaid Principal Balance	951	2,308	1,113
Related Allowance	0	296	0
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment, with no related allowance	872	1,185	1,219
Average recorded investment, with related allowance	8	1,124	744
Average Recorded Investment	880	2,309	1,963
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized interest income, with no related allowance	0	4	0
Recognized interest income, with related allowance	0	0	1
Recognized Interest Income	0	4	1
Consumer
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded investment, with no related allowance	7	0	8
Recorded investment, with related allowance	0	67	0
Recorded Investment	7	67	8
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no related allowance	7	0	8
Unpaid principal balance with related allowance	0	67	0
Unpaid Principal Balance	7	67	8
Related Allowance	0	58	0
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment, with no related allowance	7	0	1
Average recorded investment, with related allowance	0	26	8
Average Recorded Investment	7	26	9
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized interest income, with no related allowance	0	0	1
Recognized interest income, with related allowance	0	0	0
Recognized Interest Income	$ 0	$ 0	$ 1

Loans - TDR's by Class and Spec

Loans - TDR's by Class and Specific Reserves (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2021USD ($)loan	Mar. 31, 2020USD ($)loan	Dec. 31, 2020USD ($)loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	73	81	74
Balance	$ 11,306	$ 14,968	$ 11,534
Specific Reserves	$ 695	$ 556	$ 369
Commercial |    Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	13	16	13
Balance	$ 2,525	$ 4,688	$ 2,558
Specific Reserves	$ 174	$ 225	$ 106
Commercial |    Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	1	1	1
Balance	$ 681	$ 701	$ 681
Specific Reserves	$ 21	$ 3	$ 18
Commercial |    Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	7	7	6
Balance	$ 964	$ 779	$ 717
Specific Reserves	$ 358	$ 131	$ 96
Municipal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	0	0	0
Balance	$ 0	$ 0	$ 0
Specific Reserves	$ 0	$ 0	$ 0
Residential |    Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	0	0	0
Balance	$ 0	$ 0	$ 0
Specific Reserves	$ 0	$ 0	$ 0
Residential |    Term
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	49	54	51
Balance	$ 6,947	$ 8,321	$ 7,384
Specific Reserves	$ 142	$ 197	$ 149
Home equity line of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	2	3	2
Balance	$ 182	$ 479	$ 186
Specific Reserves	$ 0	$ 0	$ 0
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	1	0	1
Balance	$ 7	$ 0	$ 8
Specific Reserves	$ 0	$ 0	$ 0

Loans - TDR's by Class and Sp_2

Loans - TDR's by Class and Specific Reserves More Than 30 Days Past Due (Details) $ in Thousands	Mar. 31, 2021USD ($)loan	Mar. 31, 2020USD ($)loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	11	22
Balance	$ 1,017	$ 3,622
Specific Reserves	$ 164	$ 155
Commercial |    Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	2	2
Balance	$ 72	$ 618
Specific Reserves	$ 72	$ 0
Commercial |    Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	0	0
Balance	$ 0	$ 0
Specific Reserves	$ 0	$ 0
Commercial |    Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	4	4
Balance	$ 419	$ 540
Specific Reserves	$ 92	$ 131
Municipal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	0	0
Balance	$ 0	$ 0
Specific Reserves	$ 0	$ 0
Residential |    Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	0	0
Balance	$ 0	$ 0
Specific Reserves	$ 0	$ 0
Residential |    Term
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	4	15
Balance	$ 366	$ 2,297
Specific Reserves	$ 0	$ 24
Home equity line of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	1	1
Balance	$ 160	$ 167
Specific Reserves	$ 0	$ 0
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	0	0
Balance	$ 0	$ 0
Specific Reserves	$ 0	$ 0

Loans - Pre-Modification and Po

Loans - Pre-Modification and Post-Modification Outstanding Recorded Investment (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021USD ($)loan	Mar. 31, 2020USD ($)loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	1	2
Pre-Modification Outstanding Recorded Investment	$ 262	$ 235
Post-Modification Outstanding Recorded Investment	262	190
Specific Reserves	$ 262	$ 0
Commercial |    Real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	0	0
Specific Reserves	$ 0	$ 0
Commercial |    Construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	0	0
Specific Reserves	$ 0	$ 0
Commercial |    Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	1	0
Pre-Modification Outstanding Recorded Investment	$ 262	$ 0
Post-Modification Outstanding Recorded Investment	262	0
Specific Reserves	$ 262	$ 0
Municipal
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	0	0
Specific Reserves	$ 0	$ 0
Residential |    Construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	0	0
Specific Reserves	$ 0	$ 0
Residential |    Term
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	2
Pre-Modification Outstanding Recorded Investment	$ 0	$ 235
Post-Modification Outstanding Recorded Investment	0	190
Specific Reserves	$ 0	$ 0
Home equity line of credit
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	0	0
Specific Reserves	$ 0	$ 0
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	0	0
Specific Reserves	$ 0	$ 0

Allowance for Loan Losses - Nar

Allowance for Loan Losses - Narrative (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021USD ($)loan_class	Dec. 31, 2020USD ($)	Mar. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loan classes | loan_class	8
Percent of related loans	0.83%	0.80%
Increase (decrease) in qualitative portion	$ 796
Allowance for loan losses	$ 16,594	$ 16,253	$ 11,858	$ 11,639
Allowance for loan losses as a percent of total loans	1.09%	1.10%	0.88%
Number of classes in the commercial loan portfolio | loan_class	3
Loan-to-value percent, commercial real estate	80.00%
Number of classes in the residential loan portfolio | loan_class	2
Construction loans, percent of capital	36.60%
Construction loans, maximum percent of capital	100.00%
Construction loans and non-owner-occupied commercial real estate loans, percent of capital	155.20%
Construction loans and non-owner-occupied commercial real estate loans, maximum percent of capital	300.00%
Outstanding loans and commitments subject by independent consulting firm	60.00%
Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential loans, loan to value percent, maximum	75.00%
Consumer loans, loan to value percent, minimum	80.00%
Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential loans, loan to value percent, maximum	80.00%
Consumer loans, loan to value percent, minimum	90.00%
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 872	$ 778	$ 725	867
Delinquent period before consumer loans are charged off	120 days
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan to value ratio	0.80
Amortization term (in years)	30 years
Delinquent period before residential loans are placed on non-accrual status	90 days
Delinquent period for loans charged off	180 days
Delinquent period for loans charged off after receipt of notification	60 days
Residential |    Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 131	102	32	25
Loan maturities	1 year
Home equity line of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 947	1,211	1,012	1,078
Loan maturities	300 months
Loan to value ratio	0.80
Commercial |    Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 649	662	424	$ 365
Loan maturities	2 years
Unallocated Reserves
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 1,027	$ 2,134	2,121
Percent of total allowance reserve	6.20%	13.10%
Unallocated Reserves | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 0	$ 0	0
Unallocated Reserves | Residential |    Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	0	0	0
Unallocated Reserves | Home equity line of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	0	0	0
Unallocated Reserves | Commercial |    Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 0	$ 0	$ 0

Allowance for Loan Losses - Fin

Allowance for Loan Losses - Financing Receivable and Allowance Element by Class (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 16,594	$ 16,253	$ 11,858	$ 11,639
Specific Reserves on Loans Evaluated Individually for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	900	462	992
General Reserves on Loans Based on Historical Loss Experience
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	2,076	1,862	1,899
Reserves for Qualitative Factors
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	12,591	11,795	6,846
Unallocated Reserves
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	1,027	2,134	2,121
Commercial |    Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	5,741	5,178	3,862	3,742
Commercial |    Real estate | Specific Reserves on Loans Evaluated Individually for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	174	112	230
Commercial |    Real estate | General Reserves on Loans Based on Historical Loss Experience
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	797	721	687
Commercial |    Real estate | Reserves for Qualitative Factors
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	4,770	4,345	2,945
Commercial |    Real estate | Unallocated Reserves
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	0	0	0
Commercial |    Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	649	662	424	365
Commercial |    Construction | Specific Reserves on Loans Evaluated Individually for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	21	18	3
Commercial |    Construction | General Reserves on Loans Based on Historical Loss Experience
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	90	92	80
Commercial |    Construction | Reserves for Qualitative Factors
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	538	552	341
Commercial |    Construction | Unallocated Reserves
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	0	0	0
Commercial |    Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	4,080	3,438	2,427	3,329
Commercial |    Other | Specific Reserves on Loans Evaluated Individually for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	563	169	172
Commercial |    Other | General Reserves on Loans Based on Historical Loss Experience
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	503	465	426
Commercial |    Other | Reserves for Qualitative Factors
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	3,014	2,804	1,829
Commercial |    Other | Unallocated Reserves
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	0	0	0
Municipal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	185	171	29	27
Municipal | Specific Reserves on Loans Evaluated Individually for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	0	0	0
Municipal | General Reserves on Loans Based on Historical Loss Experience
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	0	0	0
Municipal | Reserves for Qualitative Factors
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	185	171	29
Municipal | Unallocated Reserves
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	0	0	0
Residential |    Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	131	102	32	25
Residential |    Construction | Specific Reserves on Loans Evaluated Individually for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	0	0	0
Residential |    Construction | General Reserves on Loans Based on Historical Loss Experience
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	12	6	10
Residential |    Construction | Reserves for Qualitative Factors
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	119	96	22
Residential |    Construction | Unallocated Reserves
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	0	0	0
Residential |    Term
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	2,962	2,579	1,226	1,024
Residential |    Term | Specific Reserves on Loans Evaluated Individually for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	142	163	233
Residential |    Term | General Reserves on Loans Based on Historical Loss Experience
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	259	145	300
Residential |    Term | Reserves for Qualitative Factors
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	2,561	2,271	693
Residential |    Term | Unallocated Reserves
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	0	0	0
Home equity line of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	947	1,211	1,012	1,078
Home equity line of credit | Specific Reserves on Loans Evaluated Individually for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	0	0	296
Home equity line of credit | General Reserves on Loans Based on Historical Loss Experience
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	130	151	168
Home equity line of credit | Reserves for Qualitative Factors
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	817	1,060	548
Home equity line of credit | Unallocated Reserves
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	0	0	0
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	872	778	725	867
Consumer | Specific Reserves on Loans Evaluated Individually for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	0	0	58
Consumer | General Reserves on Loans Based on Historical Loss Experience
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	285	282	228
Consumer | Reserves for Qualitative Factors
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	587	496	439
Consumer | Unallocated Reserves
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	0	0	0
Unallocated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	1,027	2,134	2,121	$ 1,182
Unallocated | Specific Reserves on Loans Evaluated Individually for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	0	0	0
Unallocated | General Reserves on Loans Based on Historical Loss Experience
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	0	0	0
Unallocated | Reserves for Qualitative Factors
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	0	0	0
Unallocated | Unallocated Reserves
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 1,027	$ 2,134	$ 2,121

Allowance for Loan Losses - Ris

Allowance for Loan Losses - Risk Ratings by Segment (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	$ 870,332	$ 827,484	$ 708,099
1 Strong
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	1,732	2,421	4,587
2 Above Average
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	60,042	56,546	57,337
3 Satisfactory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	204,334	199,165	126,405
4 Average
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	447,239	414,786	363,753
5 Watch
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	138,860	137,026	129,677
6 OAEM
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	2,326	2,988	4,658
7 Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	15,799	14,552	21,682
8 Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	0	0	0
Commercial |    Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	469,974	442,121	382,753
Commercial |    Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	53,394	56,565	43,913
Commercial |    Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	297,488	285,015	237,896
Commercial | 1 Strong |    Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	0	0	0
Commercial | 1 Strong |    Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	0	0	0
Commercial | 1 Strong |    Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	1,716	2,402	4,559
Commercial | 2 Above Average |    Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	7,663	5,938	10,222
Commercial | 2 Above Average |    Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	187	2,343	842
Commercial | 2 Above Average |    Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	4,560	6,326	5,933
Commercial | 3 Satisfactory |    Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	94,014	91,475	83,905
Commercial | 3 Satisfactory |    Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	2,837	2,889	1,873
Commercial | 3 Satisfactory |    Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	107,116	104,432	40,255
Commercial | 4 Average |    Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	279,879	261,539	203,263
Commercial | 4 Average |    Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	37,779	31,221	26,029
Commercial | 4 Average |    Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	128,120	120,570	131,664
Commercial | 5 Watch |    Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	77,299	72,840	68,618
Commercial | 5 Watch |    Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	12,375	19,893	14,702
Commercial | 5 Watch |    Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	49,186	44,293	46,357
Commercial | 6 OAEM |    Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	2,261	2,754	1,834
Commercial | 6 OAEM |    Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	0	0	0
Commercial | 6 OAEM |    Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	65	234	2,824
Commercial | 7 Substandard |    Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	8,858	7,575	14,911
Commercial | 7 Substandard |    Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	216	219	467
Commercial | 7 Substandard |    Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	6,725	6,758	6,304
Commercial | 8 Doubtful |    Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	0	0	0
Commercial | 8 Doubtful |    Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	0	0	0
Commercial | 8 Doubtful |    Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	0	0	0
Municipal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	49,476	43,783	43,537
Municipal | 1 Strong
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	16	19	28
Municipal | 2 Above Average
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	47,632	41,939	40,340
Municipal | 3 Satisfactory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	367	369	372
Municipal | 4 Average
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	1,461	1,456	2,797
Municipal | 5 Watch
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	0	0	0
Municipal | 6 OAEM
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	0	0	0
Municipal | 7 Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	0	0	0
Municipal | 8 Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	$ 0	$ 0	$ 0

Allowance for Loan Losses - Act

Allowance for Loan Losses - Activity by Class (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 16,253	$ 11,639	$ 11,639
Charge offs	279	255	1,661
Recoveries	95	74	225
Provision (credit)	525	400	6,050
Ending balance	16,594	11,858	16,253
Ending balance specifically evaluated for impairment	900	992	462
Ending balance collectively evaluated for impairment	15,694	10,866	15,791
Ending balance	1,516,772	1,344,208	1,476,761
Ending balance specifically evaluated for impairment	16,340	22,493	16,039
Ending balance collectively evaluated for impairment	1,500,432	1,321,715	1,460,722
Commercial |    Real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	5,178	3,742	3,742
Charge offs	5	0	1,088
Recoveries	65	0	0
Provision (credit)	503	120	2,524
Ending balance	5,741	3,862	5,178
Ending balance specifically evaluated for impairment	174	230	112
Ending balance collectively evaluated for impairment	5,567	3,632	5,066
Ending balance	469,974	382,753	442,121
Ending balance specifically evaluated for impairment	3,201	6,223	3,029
Ending balance collectively evaluated for impairment	466,773	376,530	439,092
Commercial |    Construction
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	662	365	365
Charge offs	0	0	0
Recoveries	0	0	0
Provision (credit)	(13)	59	297
Ending balance	649	424	662
Ending balance specifically evaluated for impairment	21	3	18
Ending balance collectively evaluated for impairment	628	421	644
Ending balance	53,394	43,913	56,565
Ending balance specifically evaluated for impairment	770	947	770
Ending balance collectively evaluated for impairment	52,624	42,966	55,795
Commercial |    Other
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,438	3,329	3,329
Charge offs	142	0	27
Recoveries	0	20	37
Provision (credit)	784	(922)	99
Ending balance	4,080	2,427	3,438
Ending balance specifically evaluated for impairment	563	172	169
Ending balance collectively evaluated for impairment	3,517	2,255	3,269
Ending balance	297,488	237,896	285,015
Ending balance specifically evaluated for impairment	2,220	990	1,779
Ending balance collectively evaluated for impairment	295,268	236,906	283,236
Municipal
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	171	27	27
Charge offs	0	0	0
Recoveries	0	0	0
Provision (credit)	14	2	144
Ending balance	185	29	171
Ending balance specifically evaluated for impairment	0	0	0
Ending balance collectively evaluated for impairment	185	29	171
Ending balance	49,476	43,537	43,783
Ending balance specifically evaluated for impairment	0	0	0
Ending balance collectively evaluated for impairment	49,476	43,537	43,783
Residential |    Construction
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	102	25	25
Charge offs	0	0	0
Recoveries	0	0	0
Provision (credit)	29	7	77
Ending balance	131	32	102
Ending balance specifically evaluated for impairment	0	0	0
Ending balance collectively evaluated for impairment	131	32	102
Ending balance	24,796	15,202	21,600
Ending balance specifically evaluated for impairment	0	0	0
Ending balance collectively evaluated for impairment	24,796	15,202	21,600
Residential |    Term
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	2,579	1,024	1,024
Charge offs	29	2	66
Recoveries	6	10	34
Provision (credit)	406	194	1,587
Ending balance	2,962	1,226	2,579
Ending balance specifically evaluated for impairment	142	233	163
Ending balance collectively evaluated for impairment	2,820	993	2,416
Ending balance	520,317	500,971	522,070
Ending balance specifically evaluated for impairment	9,267	12,038	9,414
Ending balance collectively evaluated for impairment	511,050	488,933	512,656
Home equity line of credit
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,211	1,078	1,078
Charge offs	0	153	153
Recoveries	1	1	22
Provision (credit)	(265)	86	264
Ending balance	947	1,012	1,211
Ending balance specifically evaluated for impairment	0	296	0
Ending balance collectively evaluated for impairment	947	716	1,211
Ending balance	77,210	90,674	79,750
Ending balance specifically evaluated for impairment	875	2,228	1,039
Ending balance collectively evaluated for impairment	76,335	88,446	78,711
Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	778	867	867
Charge offs	103	100	327
Recoveries	23	43	132
Provision (credit)	174	(85)	106
Ending balance	872	725	778
Ending balance specifically evaluated for impairment	0	58	0
Ending balance collectively evaluated for impairment	872	667	778
Ending balance	24,117	29,262	25,857
Ending balance specifically evaluated for impairment	7	67	8
Ending balance collectively evaluated for impairment	24,110	29,195	25,849
Unallocated
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	2,134	1,182	1,182
Charge offs	0	0	0
Recoveries	0	0	0
Provision (credit)	(1,107)	939	952
Ending balance	1,027	2,121	2,134
Ending balance specifically evaluated for impairment	0	0	0
Ending balance collectively evaluated for impairment	1,027	2,121	2,134
Ending balance	0	0	0
Ending balance specifically evaluated for impairment	0	0	0
Ending balance collectively evaluated for impairment	$ 0	$ 0	$ 0

Stock-Based Compensation - Narr

Stock-Based Compensation - Narrative (Details) - USD ($) $ in Thousands	Apr. 28, 2020	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share based compensation cost		$ 2,230
Compensation expense recognized for restricted shares		288	$ 150
Unrecognized compensation costs		$ 1,252	$ 797
2010 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares not issued (in shares)	215,513
2010 Plan | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants during the period (in shares)		184,487
2020 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares of common stock reserved for issuance (in shares)				400,000
2020 Plan | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants during the period (in shares)		40,439

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Restricted Stock Granted (Details) - Restricted Stock - shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
2010 Plan | 2017 | Five Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term (In Years)					5 years
Shares	5,774
Remaining Term (In Years)					9 months 18 days
2010 Plan | 2018 | Five Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term (In Years)				5 years
Shares	6,184
Remaining Term (In Years)				1 year 9 months 18 days
2010 Plan | 2018 | Four Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term (In Years)				4 years
Shares	706
Remaining Term (In Years)				9 months 18 days
2010 Plan | 2019 | Three Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term (In Years)			3 years
Shares	16,254
Remaining Term (In Years)			9 months 18 days
2020 Plan | 2020 | Three Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term (In Years)		3 years
Shares	20,842
Remaining Term (In Years)		1 year 9 months 18 days
2020 Plan | 2020 | Two Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term (In Years)		2 years
Shares	694
Remaining Term (In Years)		9 months 18 days
2020 Plan | 2020 | One Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term (In Years)		1 year
Shares	3,500
Remaining Term (In Years)		2 months 12 days
2010 and 2020 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares	85,740
Remaining Term (In Years)	1 year 9 months 18 days
2010 and 2020 Equity Incentive Plan | 2021 | Three Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term (In Years)	3 years
Shares	27,422
Remaining Term (In Years)	2 years 9 months 18 days
2010 and 2020 Equity Incentive Plan | 2021 | Four Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term (In Years)	4 months 24 days
Shares	250
Remaining Term (In Years)	2 months 12 days
2010 and 2020 Equity Incentive Plan | 2021 | One Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term (In Years)	1 year
Shares	4,114
Remaining Term (In Years)	9 months 18 days

Common Stock (Details)

Common Stock (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Class of Stock [Line Items]
Proceeds from sale of common stock	$ 182	$ 163
Capital Purchase Program
Class of Stock [Line Items]
Proceeds from sale of common stock	$ 182	$ 163

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income (Numerator)
Net income as reported	$ 8,922	$ 6,495
Basic EPS: Income available to common shareholders	8,922	6,495
Diluted EPS: Income available to common shareholders plus assumed conversions	$ 8,922	$ 6,495
Shares (Denominator)
Basic EPS: Income available to common shareholders (in shares)	10,888,133	10,844,600
Effect of dilutive securities: restricted stock (in shares)	85,679	69,753
Diluted EPS: Income available to common shareholders plus assumed conversions (in shares)	10,973,812	10,914,353
Per-Share Amount
Basic EPS: Income available to common shareholders (usd per share)	$ 0.82	$ 0.60
Diluted EPS: Income available to common shareholders plus assumed conversions (usd per share)	$ 0.81	$ 0.60

Employee Benefit Plans - Narrat

Employee Benefit Plans - Narrative (Details)	3 Months Ended
	Mar. 31, 2021USD ($)employeepost_retirement_benefit_plan	Mar. 31, 2020USD ($)	Dec. 31, 2020USD ($)
Retirement Benefits, Description [Abstract]
Defined contribution plan service period (in months)	3 months
Defined contribution plan employer maximum percentage match of annual salary based on employee contribution	3.00%
Defined contribution plan employer maximum percentage of annual profit-sharing contribution to plan for benefit of employee (in hundredths)			3.00%
Expense related to 401(k) plan	$ 217,000	$ 255,000
Unfunded, supplemental retirement benefits payable period	20 years
Pension expense	$ 42,000	40,000
Accrued pension liability	$ 2,961,000	$ 2,772,000	$ 2,991,000
Number of post-retirement benefit plans | post_retirement_benefit_plan	2
Number of employees currently eligible (employee) | employee	6
Employee benefit plan age (in years)	50 years
Post-retirement benefit plan health insurance subsidy range minimum per month per person	$ 40
Post-retirement benefit plan health insurance subsidy range maximum per month per person	$ 1,200
Discount rate	2.00%
Assumed health care cost trend rate	7.00%
Expected future benefit payments, current year	$ 97,000
Estimated plan expense	30,000
Effect of one percentage point increase on accumulated benefit obligation	100,000
Effect of one percentage point increase on interest cost	7,000
Effect of one percentage point increase on service cost	$ 1,000

Employee Benefit Plans - Accumu

Employee Benefit Plans - Accumulated Post-Retirement Benefit Obligation, Funded Status, and Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Change in benefit obligation
Benefit obligation at beginning of year	$ 1,523	$ 1,581
Interest cost	7	16
Benefits paid	(24)	(27)
Benefit obligation at end of period	1,506	1,570
Funded status
Benefit obligation at end of period	(1,506)	(1,570)	$ (1,506)	$ (1,570)
Unamortized gain	(35)	(31)
Accrued benefit cost at end of period			$ (1,541)	$ (1,601)
Components of net periodic benefit cost
Interest cost	7	16
Net periodic benefit cost	$ 7	$ 16

Employee Benefit Plans - Schedu

Employee Benefit Plans - Schedule of Net Periodic Benefit Cost Not Yet Recognized (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Retirement Benefits, Description [Abstract]
Unamortized net actuarial gain	$ 35	$ 35	$ 31
Deferred tax expense	(7)	(7)	(7)
Net unrecognized postretirement benefits included in accumulated other comprehensive income	$ 28	$ 28	$ 24

Other Comprehensive Income (L_3

Other Comprehensive Income (Loss) - Summary of Unrealized Gains and Losses on Available-for-Sale Securities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	$ 223,726	$ 212,508
Balance at end of period	228,184	215,257
Accumulated Net Investment Gain (Loss) Attributable to Parent
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	5,009	3,657
Unrealized gains (losses) arising during the period	(5,945)	6,109
Reclassification of net realized gains during the period	(119)	(752)
Related deferred taxes	1,274	(1,124)
Net change	(4,790)	4,233
Balance at end of period	$ 219	$ 7,890

Other Comprehensive Income (L_4

Other Comprehensive Income (Loss) - Summary of Transfer of AFS Securities to HTM (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Reclassification of Available-for-Sale Securities to Held-to-maturity Roll Forward [Roll Forward]
Balance at beginning of period	$ 223,726	$ 212,508
Balance at end of period	228,184	215,257
Accumulated Net Gain (Loss) on Securities Transferred from Available-for-Sale to Held-to-Maturity
Reclassification of Available-for-Sale Securities to Held-to-maturity Roll Forward [Roll Forward]
Balance at beginning of period	(133)	(182)
Reclassification of net realized gains during the period	11	10
Related deferred taxes	(2)	(2)
Net change	9	8
Balance at end of period	$ (124)	$ (174)

Other Comprehensive Income (L_5

Other Comprehensive Income (Loss) - Summary of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	$ 223,726	$ 212,508
Balance at end of period	228,184	215,257
Accumulated Net Gain (Loss) from Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(4,932)	97
Unrealized gains (losses) arising during the period	4,390	(6,165)
Related deferred taxes	(921)	1,295
Net change	3,469	(4,870)
Balance at end of period	$ (1,463)	$ (4,773)

Other Comprehensive Income (L_6

Other Comprehensive Income (Loss) - Summary of Unrealized Gains and Losses on Postretirement Benefits (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	$ 223,726	$ 212,508
Balance at end of period	228,184	215,257
Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	28	24
Reclassification of net realized gains during the period	0	0
Change in unamortized net actuarial gain (loss)	0	0
Related deferred taxes	0	0
Balance at end of period	$ 28	$ 24

Financial Derivative Instrume_3

Financial Derivative Instruments (Details)	3 Months Ended
	Mar. 31, 2020USD ($)derivative	Mar. 31, 2021USD ($)derivative	Dec. 31, 2020USD ($)derivative
Interest Rate Swap
Derivative [Line Items]
Expense incurred from restructuring derivatives	$ 1,760,000
Not Designated as Hedging Instrument | Customer loan interest swap agreements
Derivative [Line Items]
Collateral posted, cash		$ 4,850,000
Not Designated as Hedging Instrument | Customer Loan Swaps
Derivative [Line Items]
Required amount to be pledged		$ 2,119,000
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap June 28 2021
Derivative [Line Items]
Fixed Rate Paid		0.94%
Notional Amount	30,000,000	$ 30,000,000	$ 30,000,000
Fair Value	(244,000)	$ (61,000)	(121,000)
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap June 27 2021
Derivative [Line Items]
Fixed Rate Paid		0.893%
Notional Amount	20,000,000	$ 20,000,000	20,000,000
Fair Value	(151,000)	$ (38,000)	(76,000)
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap August 2 2024
Derivative [Line Items]
Fixed Rate Paid		1.59%
Notional Amount	12,500,000	$ 12,500,000	12,500,000
Fair Value	(663,000)	$ (458,000)	(626,000)
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap August 5 2024
Derivative [Line Items]
Fixed Rate Paid		1.42%
Notional Amount	12,500,000	$ 12,500,000	12,500,000
Fair Value	(571,000)	$ (387,000)	(550,000)
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap February 12 2023
Derivative [Line Items]
Fixed Rate Paid		1.486%
Notional Amount	25,000,000	$ 25,000,000	25,000,000
Fair Value	(748,000)	$ (580,000)	(695,000)
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap February 12 2024
Derivative [Line Items]
Fixed Rate Paid		1.477%
Notional Amount	25,000,000	$ 25,000,000	25,000,000
Fair Value	(972,000)	$ (735,000)	(972,000)
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap June 28 2026
Derivative [Line Items]
Fixed Rate Paid		1.158%
Notional Amount	50,000,000	$ 50,000,000	50,000,000
Fair Value	(1,569,000)	$ (352,000)	(1,872,000)
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap March 13 2025
Derivative [Line Items]
Fixed Rate Paid		0.855%
Notional Amount	25,000,000	$ 25,000,000	25,000,000
Fair Value	(463,000)	$ (99,000)	(551,000)
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap March 13 2030
Derivative [Line Items]
Fixed Rate Paid		1.029%
Notional Amount	20,000,000	$ 20,000,000	20,000,000
Fair Value	(661,000)	$ 1,071,000	(339,000)
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap April 07 2023
Derivative [Line Items]
Fixed Rate Paid		0.599%
Notional Amount	0	$ 20,000,000	20,000,000
Fair Value	0	$ (129,000)	(185,000)
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap April 07 2024
Derivative [Line Items]
Fixed Rate Paid		0.643%
Notional Amount	0	$ 20,000,000	20,000,000
Fair Value	0	(84,000)	(255,000)
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap
Derivative [Line Items]
Notional Amount	220,000,000	260,000,000	260,000,000
Fair Value	(6,042,000)	(1,852,000)	(6,242,000)
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap Maturity Date Prior to December 31, 2021
Derivative [Line Items]
Notional Amount		$ 50,000,000
Number of derivative instruments | derivative		2
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap Maturity Date Prior to June 30, 2023
Derivative [Line Items]
Notional Amount		$ 45,000,000
Number of derivative instruments | derivative		2
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap Maturity Date Beyond June 30, 2023
Derivative [Line Items]
Notional Amount		$ 165,000,000
Number of derivative instruments | derivative		7
Cash Flow Hedging | Designated as Hedging Instrument | Customer Loan Swaps Maturity Dates December 19, 2029 , August 21, 2030, April 30,2031, October 1, 2035 and April 1, 2039
Derivative [Line Items]
Number of derivative instruments | derivative		6
Cash Flow Hedging | Not Designated as Hedging Instrument | Customer loan interest swap agreements
Derivative [Line Items]
Fair Value	$ 0	$ 0	$ 0
Number of derivative instruments | derivative	4	12	10
Derivative notional amount	$ 32,588,000	$ 83,712,000	$ 65,974,000
Cash Flow Hedging | Not Designated as Hedging Instrument | Customer loan interest swap agreements | Pay Fixed, Receive Variable
Derivative [Line Items]
Fair Value	$ (3,280,000)	$ (62,000)	$ (2,566,000)
Number of derivative instruments | derivative	2	6	5
Derivative notional amount	$ 16,294,000	$ 41,856,000	$ 32,987,000
Cash Flow Hedging | Not Designated as Hedging Instrument | Customer loan interest swap agreements | Receive Fixed, Pay Variable
Derivative [Line Items]
Fair Value	$ 3,280,000	$ 62,000	$ 2,566,000
Number of derivative instruments | derivative	2	6	5
Derivative notional amount	$ 16,294,000	$ 41,856,000	$ 32,987,000
Cash Flow Hedging | Not Designated as Hedging Instrument | Other Liabilities | Customer loan interest swap agreements | Pay Fixed, Receive Variable
Derivative [Line Items]
Fair Value	$ (3,280,000)	$ (1,334,000)	$ (2,603,000)
Number of derivative instruments | derivative	2	3	2
Derivative notional amount	$ 16,294,000	$ 25,059,000	$ 16,065,000
Cash Flow Hedging | Not Designated as Hedging Instrument | Other Liabilities | Customer loan interest swap agreements | Receive Fixed, Pay Variable
Derivative [Line Items]
Fair Value	$ 0	$ (1,272,000)	$ (37,000)
Number of derivative instruments | derivative	0	3	3
Derivative notional amount	$ 0	$ 16,797,000	$ 16,922,000
Cash Flow Hedging | Not Designated as Hedging Instrument | Other Assets | Customer loan interest swap agreements | Pay Fixed, Receive Variable
Derivative [Line Items]
Fair Value	$ 0	$ 1,272,000	$ 37,000
Number of derivative instruments | derivative	0	3	3
Derivative notional amount	$ 0	$ 16,797,000	$ 16,922,000
Cash Flow Hedging | Not Designated as Hedging Instrument | Other Assets | Customer loan interest swap agreements | Receive Fixed, Pay Variable
Derivative [Line Items]
Fair Value	$ 3,280,000	$ 1,334,000	$ 2,603,000
Number of derivative instruments | derivative	2	3	2
Derivative notional amount	$ 16,294,000	$ 25,059,000	$ 16,065,000

Mortgage Servicing Rights - Nar

Mortgage Servicing Rights - Narrative (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Transfers and Servicing [Abstract]
Moving average of weekly prepayment data (in months)	3 months
Anticipated loan prepayment rate of servicing assets (in hundredths)	15.24%
Servicing assets and servicing liabilities at fair value, assumptions used to estimate fair value, discount rate adjustment factor (in hundredths)	9.00%
Mortgage servicing rights capitalized	$ 328,000	$ 129,000
Amortization of mortgage servicing rights	151,000	66,000
Fair value of mortgage servicing rights	2,608,000	2,126,000	$ 1,985,000
Outstanding principal balance of loans serviced for others	335,938,000	268,077,000	318,459,000
Mortgage servicing rights impairment	$ 92,000	$ 0	$ 358,000

Mortgage Servicing Rights - Sch

Mortgage Servicing Rights - Schedule of Mortgage Servicing Rights (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Transfers and Servicing [Abstract]
Mortgage servicing rights	$ 7,627,000	$ 6,269,000	$ 7,299,000
Accumulated amortization	(5,136,000)	(4,660,000)	(4,985,000)
Amortized cost	2,491,000	1,609,000	2,314,000
Impairment reserve	(92,000)	0	(358,000)
Carrying value	$ 2,399,000	$ 1,609,000	$ 1,956,000

Certificates of Deposit (Detail

Certificates of Deposit (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Deposits [Abstract]
Certificates of deposit of less than $100,000	$ 230,290	$ 246,875	$ 274,621
Certificates $100,000 to $250,000	343,805	295,672	364,530
Certificates $250,000 and over	60,235	63,038	71,787
Total certificates of deposit	$ 634,330	$ 605,585	$ 710,938

Fair Value - Assets and Liabili

Fair Value - Assets and Liabilities Recorded at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	$ 294,537	$ 313,376	$ 312,928
U.S. Government-sponsored agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	21,485	22,730	7,552
Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	227,914	243,406	285,152
State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	37,558	39,474	20,224
Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	7,580	7,766
Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0	0
Derivative assets	0	0	0
Total assets	0	0	0
Derivative liabilities	0	0	0
Fair Value, Measurements, Recurring | Level 1 | Interest rate swap agreements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0
Derivative liabilities	0	0	0
Fair Value, Measurements, Recurring | Level 1 | Customer loan interest swap agreements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0	0	0
Derivative liabilities	0	0
Fair Value, Measurements, Recurring | Level 1 | U.S. Government-sponsored agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0	0
Fair Value, Measurements, Recurring | Level 1 |    Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0	0
Fair Value, Measurements, Recurring | Level 1 |    State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0	0
Fair Value, Measurements, Recurring | Level 1 | Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	294,537	313,376	312,928
Derivative assets	3,677	2,640	3,280
Total assets	298,214	316,016	316,208
Derivative liabilities	5,529	8,882	9,322
Fair Value, Measurements, Recurring | Level 2 | Interest rate swap agreements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	1,071
Derivative liabilities	2,923	6,242	6,042
Fair Value, Measurements, Recurring | Level 2 | Customer loan interest swap agreements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	2,606	2,640	3,280
Derivative liabilities	2,606	2,640
Fair Value, Measurements, Recurring | Level 2 | U.S. Government-sponsored agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	21,485	22,730	7,552
Fair Value, Measurements, Recurring | Level 2 |    Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	227,914	243,406	285,152
Fair Value, Measurements, Recurring | Level 2 |    State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	37,558	39,474	20,224
Fair Value, Measurements, Recurring | Level 2 | Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	7,580	7,766
Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0	0
Derivative assets	0	0	0
Total assets	0	0	0
Derivative liabilities	0	0	0
Fair Value, Measurements, Recurring | Level 3 | Interest rate swap agreements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0
Derivative liabilities	0	0	0
Fair Value, Measurements, Recurring | Level 3 | Customer loan interest swap agreements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0	0	0
Derivative liabilities	0	0	0
Fair Value, Measurements, Recurring | Level 3 | U.S. Government-sponsored agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0	0
Fair Value, Measurements, Recurring | Level 3 |    Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0	0
Fair Value, Measurements, Recurring | Level 3 |    State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0	0
Fair Value, Measurements, Recurring | Level 3 | Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
Fair Value, Measurements, Recurring | Total Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	294,537	313,376	312,928
Derivative assets	3,677	2,640	3,280
Total assets	298,214	316,016	316,208
Derivative liabilities	5,529	8,882	9,322
Fair Value, Measurements, Recurring | Total Fair Value | Interest rate swap agreements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	1,071
Derivative liabilities	2,923	6,242	6,042
Fair Value, Measurements, Recurring | Total Fair Value | Customer loan interest swap agreements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	2,606	2,640	3,280
Derivative liabilities	2,606	2,640
Fair Value, Measurements, Recurring | Total Fair Value | U.S. Government-sponsored agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	21,485	22,730	7,552
Fair Value, Measurements, Recurring | Total Fair Value |    Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	227,914	243,406	285,152
Fair Value, Measurements, Recurring | Total Fair Value |    State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	37,558	39,474	$ 20,224
Fair Value, Measurements, Recurring | Total Fair Value | Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	$ 7,580	$ 7,766

Fair Value - Additional Informa

Fair Value - Additional Information (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Mortgage servicing rights impairment	$ 92,000	$ 0	$ 358,000
Valuation allowance on real estate owned	45,000		45,000
Valuation allowance on impaired financing receivable	$ 641,000	$ 706,000	$ 304,000

Fair Value - Assets Recorded at

Fair Value - Assets Recorded at Fair Value on a Non-Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage servicing rights	$ 2,608	$ 1,985	$ 2,126
Other real estate owned	401	908	316
Total Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage servicing rights	2,608	1,985	2,126
Total Fair Value | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage servicing rights	0	0	0
Total Fair Value | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage servicing rights	2,608	1,985	2,126
Total Fair Value | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage servicing rights	0	0	0
Fair Value, Measurements, Nonrecurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage servicing rights	0	0
Other real estate owned	0	0	0
Impaired loans	0	0	0
Total assets	0	0	0
Fair Value, Measurements, Nonrecurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage servicing rights	2,608	1,985
Other real estate owned	401	908	316
Impaired loans	234	794	1,051
Total assets	3,243	3,687	1,367
Fair Value, Measurements, Nonrecurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage servicing rights	0	0
Other real estate owned	0	0	0
Impaired loans	0	0	0
Total assets	0	0	0
Fair Value, Measurements, Nonrecurring | Total Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage servicing rights	2,608	1,985
Other real estate owned	401	908	316
Impaired loans	234	794	1,051
Total assets	$ 3,243	$ 3,687	$ 1,367

Fair Value - Assets and Liabi_2

Fair Value - Assets and Liabilities at Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Securities to be held to maturity	$ 388,836	$ 377,134	$ 349,248
Mortgage servicing rights	2,608	1,985	2,126
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Local certificates of deposit	634,330	605,585	710,938
Total deposits	1,953,557	1,844,611	1,644,612
Level 1
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Local certificates of deposit	0
Level 2
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Local certificates of deposit	249,458
Level 3
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Local certificates of deposit	0
Carrying value
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Securities to be held to maturity	385,352	365,613	341,592
Loans	1,500,178	1,460,508	1,332,350
Mortgage servicing rights	2,399	1,956	1,609
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Local certificates of deposit	246,976	250,264	290,440
National certificates of deposit	387,354	355,321	420,498
Total deposits	634,330	605,585	710,938
Repurchase agreements	71,952	69,340	37,937
Federal Home Loan Bank and Federal Reserve Bank borrowings	157,696	192,698	210,103
Total borrowed funds	229,648	262,038	248,040
Carrying value | Commercial |    Real estate
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	463,854	436,161	378,049
Carrying value | Commercial |    Construction
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	52,702	55,803	43,397
Carrying value | Commercial |    Other
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	293,139	281,057	234,940
Carrying value | Municipal
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	49,279	43,586	43,502
Carrying value | Residential |    Construction
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	24,656	21,483	15,163
Carrying value | Residential |    Term
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	517,160	519,101	499,478
Carrying value | Home equity line of credit
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	76,201	78,356	89,442
Carrying value | Consumer
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	23,187	24,961	28,379
Total Fair Value
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Securities to be held to maturity	388,836	377,134	349,248
Loans	1,496,844	1,476,692	1,324,671
Mortgage servicing rights	2,608	1,985	2,126
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Local certificates of deposit	249,458	253,892	290,886
National certificates of deposit	359,899	359,899	429,110
Total deposits	609,357	613,791	719,996
Repurchase agreements	70,105	69,497	37,494
Federal Home Loan Bank and Federal Reserve Bank borrowings	159,184	194,469	211,228
Total borrowed funds	229,289	263,966	248,722
Total Fair Value | Commercial |    Real estate
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	459,158	440,735	371,916
Total Fair Value | Commercial |    Construction
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	52,168	56,388	42,693
Total Fair Value | Commercial |    Other
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	289,541	279,501	233,411
Total Fair Value | Municipal
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	48,698	44,440	41,909
Total Fair Value | Residential |    Construction
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	25,028	21,890	15,304
Total Fair Value | Residential |    Term
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	526,134	533,059	503,098
Total Fair Value | Home equity line of credit
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	74,813	77,177	89,407
Total Fair Value | Consumer
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	21,304	23,502	26,933
Total Fair Value | Level 1
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Securities to be held to maturity	0	0	0
Loans	0	0	0
Mortgage servicing rights	0	0	0
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Local certificates of deposit		0	0
National certificates of deposit	0	0	0
Total deposits	0	0	0
Repurchase agreements	0	0	0
Federal Home Loan Bank and Federal Reserve Bank borrowings	0	0	0
Total borrowed funds	0	0	0
Total Fair Value | Level 1 | Commercial |    Real estate
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	0	0	0
Total Fair Value | Level 1 | Commercial |    Construction
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	0	0	0
Total Fair Value | Level 1 | Commercial |    Other
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	0	0	0
Total Fair Value | Level 1 | Municipal
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	0	0	0
Total Fair Value | Level 1 | Residential |    Construction
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	0	0	0
Total Fair Value | Level 1 | Residential |    Term
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	0	0	0
Total Fair Value | Level 1 | Home equity line of credit
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	0	0	0
Total Fair Value | Level 1 | Consumer
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	0	0	0
Total Fair Value | Level 2
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Securities to be held to maturity	388,836	377,134	349,248
Loans	234	794	1,051
Mortgage servicing rights	2,608	1,985	2,126
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Local certificates of deposit		253,892	290,886
National certificates of deposit	359,899	359,899	429,110
Total deposits	609,357	613,791	719,996
Repurchase agreements	70,105	69,497	37,494
Federal Home Loan Bank and Federal Reserve Bank borrowings	159,184	194,469	211,228
Total borrowed funds	229,289	263,966	248,722
Total Fair Value | Level 2 | Commercial |    Real estate
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	0	347	7
Total Fair Value | Level 2 | Commercial |    Construction
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	0	0	0
Total Fair Value | Level 2 | Commercial |    Other
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	50	5	0
Total Fair Value | Level 2 | Municipal
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	0	0	0
Total Fair Value | Level 2 | Residential |    Construction
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	0	0	0
Total Fair Value | Level 2 | Residential |    Term
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	184	442	335
Total Fair Value | Level 2 | Home equity line of credit
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	0	0	700
Total Fair Value | Level 2 | Consumer
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	0	0	9
Total Fair Value | Level 3
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Securities to be held to maturity	0	0	0
Loans	1,496,610	1,475,898	1,323,620
Mortgage servicing rights	0	0	0
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Local certificates of deposit		0	0
National certificates of deposit	0	0	0
Total deposits	0	0	0
Repurchase agreements	0	0	0
Federal Home Loan Bank and Federal Reserve Bank borrowings	0	0	0
Total borrowed funds	0	0	0
Total Fair Value | Level 3 | Commercial |    Real estate
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	459,158	440,388	371,909
Total Fair Value | Level 3 | Commercial |    Construction
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	52,168	56,388	42,693
Total Fair Value | Level 3 | Commercial |    Other
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	289,491	279,496	233,411
Total Fair Value | Level 3 | Municipal
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	48,698	44,440	41,909
Total Fair Value | Level 3 | Residential |    Construction
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	25,028	21,890	15,304
Total Fair Value | Level 3 | Residential |    Term
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	525,950	532,617	502,763
Total Fair Value | Level 3 | Home equity line of credit
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	74,813	77,177	88,707
Total Fair Value | Level 3 | Consumer
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans	$ 21,304	$ 23,502	$ 26,924