The First Bancorp, Inc. (FNLC) 10-Q 12 Nov 19 2019 Q3 Quarterly report Financial data

Cover

Cover - shares	9 Months Ended
	Sep. 30, 2019	Nov. 01, 2019
Cover page.
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2019
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
Entity Central Index Key	0000765207
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Amendment Flag	false
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		10,899,787

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Assets
Cash and cash equivalents	$ 21,418	$ 19,134	$ 21,649
Interest bearing deposits in other banks	16,714	12,079	51,045
Securities available for sale	326,798	317,416	302,187
Securities to be held to maturity (fair value of $306,647,000 at September 30, 2019, $250,900,000 at December 31, 2018 and $249,890,000 at September 30, 2018)	298,786	255,663	257,395
Restricted equity securities, at cost	8,982	11,586	11,586
Loans held for sale	852	0	1,134
Loans	1,263,459	1,238,283	1,243,558
Less allowance for loan losses	11,765	11,232	11,682
Net loans	1,251,694	1,227,051	1,231,876
Accrued interest receivable	7,636	6,660	7,095
Premises and equipment, net	21,232	22,056	21,451
Other real estate owned	279	584	584
Goodwill	29,805	29,805	29,805
Other assets	49,031	42,536	46,047
Total assets	2,033,227	1,944,570	1,981,854
Liabilities
Demand deposits	171,623	163,575	170,728
NOW deposits	400,514	382,923	357,834
Money market deposits	148,689	152,043	129,516
Savings deposits	240,691	237,135	237,424
Certificates of deposit	661,773	591,409	619,409
Total deposits	1,623,290	1,527,085	1,514,911
Borrowed funds – short term	171,310	145,205	200,160
Borrowed funds – long term	10,107	65,112	65,114
Other liabilities	20,031	15,626	17,008
Total liabilities	1,824,738	1,753,028	1,797,193
Shareholders' equity
Common stock, one cent par value per share	109	109	109
Additional paid-in capital	63,602	62,746	62,497
Retained earnings	141,509	132,460	129,247
Accumulated other comprehensive income (loss)
Net unrealized gain (loss) on securities available for sale	3,686	(5,051)	(9,133)
Net unrealized loss on securities transferred from available for sale to held to maturity	(189)	(197)	(194)
Net unrealized gain (loss) on cash flow hedging derivative instruments	(265)
Net unrealized gain (loss) on cash flow hedging derivative instruments		1,438	2,282
Net unrealized gain (loss) on postretirement benefit costs	37	37	(147)
Total shareholders' equity	208,489	191,542	184,661
Total liabilities & shareholders' equity	$ 2,033,227	$ 1,944,570	$ 1,981,854
Common Stock
Number of shares authorized (in shares)	18,000,000	18,000,000	18,000,000
Number of shares outstanding (in shares)	10,896,331	10,862,651	10,857,116
Number of shares issued (in shares)	10,896,331	10,862,651	10,857,116
Book value per common share (usd per share)	$ 19.13	$ 17.63	$ 17.01
Tangible book value per common share (usd per share)	$ 16.39	$ 14.87	$ 14.25

Consolidated Balance Sheets (_2

Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Assets
Securities to be held to maturity, fair value	$ 306,647	$ 250,900	$ 249,890

Consolidated Statements of Inco

Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Interest income
Interest and fees on loans (includes tax-exempt income of $1,001,000 as of September 30, 2019 and $822,000 as of September 30, 2018)	$ 14,993	$ 13,735	$ 44,450	$ 39,164
Interest on deposits with other banks	48	115	145	132
Interest and dividends on investments (includes tax-exempt income of $5,480,000 as of September 30, 2019 and $5,208,000 as of September 30, 2018)	4,863	4,236	14,399	12,446
Total interest income	19,904	18,086	58,994	51,742
Interest expense
Interest on deposits	5,983	4,274	17,739	11,131
Interest on borrowed funds	695	1,276	2,180	3,397
Total interest expense	6,678	5,550	19,919	14,528
Net interest income	13,226	12,536	39,075	37,214
Provision for loan losses	250	333	875	1,333
Net interest income after provision for loan losses	12,976	12,203	38,200	35,881
Non-interest income
Net securities gains	15	1	15	137
Other operating income	1,542	1,413	4,833	4,259
Total non-interest income	3,532	3,034	10,281	9,347
Non-interest expense
Salaries and employee benefits	4,865	4,460	13,698	13,230
Occupancy expense	644	574	1,931	1,871
Furniture and equipment expense	969	972	2,969	2,816
FDIC insurance premiums	0	337	439	950
Amortization of identified intangibles	10	10	32	32
Other operating expense	2,552	1,863	7,099	6,072
Total non-interest expense	9,040	8,216	26,168	24,971
Income before income taxes	7,468	7,021	22,313	20,257
Income tax expense	1,180	1,088	3,474	3,084
NET INCOME	$ 6,288	$ 5,933	$ 18,839	$ 17,173
Basic earnings per common share (usd per share)	$ 0.58	$ 0.55	$ 1.74	$ 1.59
Diluted earnings per common share (usd per share)	$ 0.58	$ 0.55	$ 1.73	$ 1.58
Other comprehensive income (loss) net of tax
Net unrealized gain (loss) on securities available for sale	$ 936	$ (1,888)	$ 8,737	$ (6,232)
Net unrealized gain (loss) on securities transferred from available for sale to held to maturity, net of amortization	1	(5)	8	(20)
Net unrealized gain (loss) on cash flow hedging derivative instruments	(340)		(1,703)
Net unrealized gain (loss) on cash flow hedging derivative instruments		216		738
Other comprehensive income (loss)	597	(1,677)	7,042	(5,514)
Comprehensive income	6,885	4,256	25,881	11,659
Investment management and fiduciary income
Non-interest income
Non-interest income	822	743	2,459	2,285
Service charges on deposit accounts
Non-interest income
Non-interest income	577	527	1,747	1,624
Mortgage origination and servicing income, net of amortization
Non-interest income
Non-interest income	$ 576	$ 350	$ 1,227	$ 1,042

Consolidated Statements of In_2

Consolidated Statements of Income and Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Interest and fees on loans (tax-exempt income)	$ 1,001	$ 822
Interest and dividends on investments (tax-exempt income)	$ 5,480	$ 5,208

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, 2017		10,829,918
Beginning balance at Dec. 31, 2017	$ 181,321	$ 61,855	$ 121,144	$ (1,678)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	17,173		17,173
Net unrealized loss on securities available for sale, net of tax	(6,232)			(6,232)
Net unrealized loss on cash flow hedging derivative instruments, net of tax	738			738
Net unrealized gain on securities transferred from available for sale to held to maturity, net of tax	(20)			(20)
Comprehensive income	11,659		17,173	(5,514)
Cash dividends declared	(8,902)		(8,902)
Equity compensation expense	285	$ 285
Payment to repurchase common stock (in shares)		(5,725)
Payment to repurchase common stock	(168)		(168)
Issuance of restricted stock (in shares)		16,795
Proceeds from sale of common stock (in shares)		16,128
Proceeds from sale of common stock	$ 466	$ 466
Ending balance (in shares) at Sep. 30, 2018	10,857,116	10,857,116
Ending balance at Sep. 30, 2018	$ 184,661	$ 62,606	129,247	(7,192)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	5,933
Net unrealized loss on securities available for sale, net of tax	(1,888)
Net unrealized gain on securities transferred from available for sale to held to maturity, net of tax	$ (5)
Ending balance (in shares) at Sep. 30, 2018	10,857,116	10,857,116
Ending balance at Sep. 30, 2018	$ 184,661	$ 62,606	129,247	(7,192)
Beginning balance (in shares) at Dec. 31, 2018	10,862,651	10,862,651
Beginning balance at Dec. 31, 2018	$ 191,542	$ 62,855	132,460	(3,773)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	18,839		18,839
Net unrealized loss on securities available for sale, net of tax	8,737			8,737
Net unrealized loss on cash flow hedging derivative instruments, net of tax	(1,703)			(1,703)
Net unrealized gain on securities transferred from available for sale to held to maturity, net of tax	8			8
Comprehensive income	25,881		18,839	7,042
Cash dividends declared	(9,694)		(9,694)
Equity compensation expense	368	$ 368
Payment to repurchase common stock (in shares)		(4,179)
Payment to repurchase common stock	(96)		(96)
Issuance of restricted stock (in shares)		19,087
Proceeds from sale of common stock (in shares)		18,772
Proceeds from sale of common stock	$ 488	$ 488
Ending balance (in shares) at Sep. 30, 2019	10,896,331	10,896,331
Ending balance at Sep. 30, 2019	$ 208,489	$ 63,711	141,509	3,269
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,288
Net unrealized loss on securities available for sale, net of tax	936
Net unrealized gain on securities transferred from available for sale to held to maturity, net of tax	$ 1
Ending balance (in shares) at Sep. 30, 2019	10,896,331	10,896,331
Ending balance at Sep. 30, 2019	$ 208,489	$ 63,711	$ 141,509	$ 3,269

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Statement of Stockholders' Equity [Abstract]
Cash dividends declared (usd per share)	$ 0.89	$ 0.82

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities
Net income	$ 18,839	$ 17,173
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	1,398	1,347
Change in deferred taxes	232	(591)
Provision for loan losses	875	1,333
Loans originated for resale	(14,177)	(6,343)
Proceeds from sales and transfers of loans	13,732	5,895
Net gain on sales of loans	(407)	(300)
Net gain on sale or call of securities	(15)	(137)
Net amortization of premiums on investments	752	1,556
Net gain on sale of other real estate owned	(113)	(312)
Equity compensation expense	368	285
Net increase in other assets and accrued interest	(9,743)	(289)
Net increase in other liabilities	2,036	4,368
Net loss on disposal of premises and equipment	386	137
Amortization of investment in limited partnership	230	133
Net acquisition amortization	32	32
Net cash provided by operating activities	14,425	24,287
Cash flows from investing activities
Increase in interest-bearing deposits in other banks	(4,635)	(50,185)
Proceeds from sales of securities available for sale	3,835	459
Proceeds from maturities, payments and calls of securities available for sale	51,633	40,515
Proceeds from maturities, payments, calls and sales of securities to be held to maturity	17,963	10,171
Proceeds from sales of other real estate owned	418	904
Purchases of securities available for sale	(54,553)	(55,591)
Purchases of securities to be held to maturity	(61,051)	(10,987)
Redemption of restricted equity securities	2,604	0
Purchase of restricted equity securities	0	(1,228)
Net increase in loans	(25,518)	(79,963)
Capital expenditures	(960)	(433)
Net cash used by investing activities	(70,264)	(146,338)
Cash flows from financing activities
Net increase in demand, savings, and money market accounts	25,821	35,624
Net increase in certificates of deposit	70,384	60,408
Net increase in short-term borrowings	0	116,516
Repayment on long-term borrowings	(28,900)	(80,000)
Payment to repurchase common stock	(96)	(168)
Proceeds from sale of common stock	488	466
Dividends paid	(9,574)	(8,353)
Net cash provided by financing activities	58,123	124,493
Net increase in cash and cash equivalents	2,284	2,442
Cash and cash equivalents at beginning of period	19,134	19,207
Cash and cash equivalents at end of period	21,418	21,649
Interest paid	19,858	14,349
Income taxes paid	3,390	1,762
Non-cash transactions
Net transfer from loans to other real estate owned	$ 0	$ 164

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2019
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 2019 period is not necessarily indicative of the results that may be expected for the year ending December 31, 2019 . 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, 2018 . Subsequent Events Events occurring subsequent to September 30, 2019 , have been evaluated as to their potential impact to the financial statements.

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2019
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 September 30, 2019 : Amortized Cost Unrealized Gains Unrealized Losses Fair Value (Estimated) Securities available for sale Mortgage-backed securities $ 317,553,000 $ 5,327,000 $ (690,000 ) $ 322,190,000 State and political subdivisions 4,580,000 28,000 — 4,608,000 $ 322,133,000 $ 5,355,000 $ (690,000 ) $ 326,798,000 Securities to be held to maturity U.S. Government-sponsored agencies $ 32,840,000 $ 93,000 $ — $ 32,933,000 Mortgage-backed securities 15,584,000 502,000 (16,000 ) 16,070,000 State and political subdivisions 236,612,000 7,136,000 (48,000 ) 243,700,000 Corporate securities 13,750,000 194,000 — 13,944,000 $ 298,786,000 $ 7,925,000 $ (64,000 ) $ 306,647,000 Restricted equity securities Federal Home Loan Bank Stock $ 7,945,000 $ — $ — $ 7,945,000 Federal Reserve Bank Stock 1,037,000 — — 1,037,000 $ 8,982,000 $ — $ — $ 8,982,000 The following table summarizes the amortized cost and estimated fair value of investment securities at December 31, 2018 : Amortized Cost Unrealized Gains Unrealized Losses Fair Value (Estimated) Securities available for sale U.S. Government-sponsored agencies $ 5,000,000 $ 7,000 $ — $ 5,007,000 Mortgage-backed securities 313,854,000 571,000 (6,732,000 ) 307,693,000 State and political subdivisions 4,955,000 — (239,000 ) 4,716,000 $ 323,809,000 $ 578,000 $ (6,971,000 ) $ 317,416,000 Securities to be held to maturity U.S. Government-sponsored agencies $ 11,155,000 $ — $ (472,000 ) $ 10,683,000 Mortgage-backed securities 18,250,000 336,000 (255,000 ) 18,331,000 State and political subdivisions 221,958,000 1,046,000 (5,418,000 ) 217,586,000 Corporate securities 4,300,000 — — 4,300,000 $ 255,663,000 $ 1,382,000 $ (6,145,000 ) $ 250,900,000 Restricted equity securities Federal Home Loan Bank Stock $ 10,549,000 $ — $ — $ 10,549,000 Federal Reserve Bank Stock 1,037,000 — — 1,037,000 $ 11,586,000 $ — $ — $ 11,586,000 The following table summarizes the amortized cost and estimated fair value of investment securities at September 30, 2018 : Amortized Cost Unrealized Gains Unrealized Losses Fair Value (Estimated) Securities available for sale U.S. Government-sponsored agencies $ 5,000,000 $ — $ (21,000 ) $ 4,979,000 Mortgage-backed securities 303,793,000 77,000 (11,300,000 ) 292,570,000 State and political subdivisions 4,955,000 — (317,000 ) 4,638,000 $ 313,748,000 $ 77,000 $ (11,638,000 ) $ 302,187,000 Securities to be held to maturity U.S. Government-sponsored agencies $ 11,155,000 $ — $ (767,000 ) $ 10,388,000 Mortgage-backed securities 19,244,000 326,000 (460,000 ) 19,110,000 State and political subdivisions 222,696,000 639,000 (7,243,000 ) 216,092,000 Corporate securities 4,300,000 — — 4,300,000 $ 257,395,000 $ 965,000 $ (8,470,000 ) $ 249,890,000 Restricted equity securities Federal Home Loan Bank Stock $ 10,549,000 $ — $ — $ 10,549,000 Federal Reserve Bank Stock 1,037,000 — — 1,037,000 $ 11,586,000 $ — $ — $ 11,586,000 The following table summarizes the contractual maturities of investment securities at September 30, 2019 : Securities available for sale Securities to be held to maturity Amortized Cost Fair Value (Estimated) Amortized Cost Fair Value (Estimated) Due in 1 year or less $ 189,000 $ 189,000 $ 1,241,000 $ 1,245,000 Due in 1 to 5 years 36,304,000 36,703,000 23,460,000 23,920,000 Due in 5 to 10 years 91,242,000 93,419,000 184,234,000 188,811,000 Due after 10 years 194,398,000 196,487,000 89,851,000 92,671,000 $ 322,133,000 $ 326,798,000 $ 298,786,000 $ 306,647,000 The following table summarizes the contractual maturities of investment securities at December 31, 2018 : Securities available for sale Securities to be held to maturity Amortized Cost Fair Value (Estimated) Amortized Cost Fair Value (Estimated) Due in 1 year or less $ — $ — $ 1,432,000 $ 1,433,000 Due in 1 to 5 years 13,501,000 13,518,000 20,717,000 20,778,000 Due in 5 to 10 years 83,954,000 83,326,000 157,544,000 155,313,000 Due after 10 years 226,354,000 220,572,000 75,970,000 73,376,000 $ 323,809,000 $ 317,416,000 $ 255,663,000 $ 250,900,000 The following table summarizes the contractual maturities of investment securities at September 30, 2018 : Securities available for sale Securities to be held to maturity Amortized Cost Fair Value (Estimated) Amortized Cost Fair Value (Estimated) Due in 1 year or less $ — $ — $ 1,796,000 $ 1,800,000 Due in 1 to 5 years 13,961,000 13,886,000 21,463,000 21,468,000 Due in 5 to 10 years 69,317,000 67,434,000 155,997,000 152,154,000 Due after 10 years 230,470,000 220,867,000 78,139,000 74,468,000 $ 313,748,000 $ 302,187,000 $ 257,395,000 $ 249,890,000 At September 30, 2019 , securities with a fair value of $216,903,000 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 $222,829,000 as of December 31, 2018 and $302,129,000 at September 30, 2018 , 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 nine months and quarters ended September 30, 2019 and 2018 : For the nine months ended September 30, For the quarter ended September 30, 2019 2018 2019 2018 Proceeds from sales of securities $ 4,725,000 $ 459,000 $ 4,725,000 $ — Gross realized gains 82,000 137,000 82,000 1,000 Gross realized losses (67,000 ) — (67,000 ) — Net gain $ 15,000 $ 137,000 $ 15,000 $ 1,000 Related income taxes $ 3,000 $ 29,000 $ 3,000 $ — Management reviews securities with unrealized losses for other than temporary impairment. As of September 30, 2019 , there were 60 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 29 had been temporarily impaired for 12 months or more. In the first quarter of 2019, one issuer of securities held in the portfolio was downgraded by a rating agency to less than investment grade. These securities totaled approximately 0.13% of overall state and municipal security holdings and were sold during the third quarter. 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 September 30, 2019 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 $ 30,249,000 $ (233,000 ) $ 22,569,000 $ (473,000 ) $ 52,818,000 $ (706,000 ) State and political subdivisions 5,073,000 (42,000 ) 306,000 (6,000 ) 5,379,000 (48,000 ) $ 35,322,000 $ (275,000 ) $ 22,875,000 $ (479,000 ) $ 58,197,000 $ (754,000 ) As of December 31, 2018 , there were 511 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 232 had been temporarily impaired for 12 months or more. Information regarding securities temporarily impaired as of December 31, 2018 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 $ — $ — $ 10,683,000 $ (472,000 ) $ 10,683,000 $ (472,000 ) Mortgage-backed securities 76,050,000 (1,061,000 ) 185,136,000 (5,926,000 ) 261,186,000 (6,987,000 ) State and political subdivisions 76,809,000 (1,784,000 ) 45,052,000 (3,873,000 ) 121,861,000 (5,657,000 ) $ 152,859,000 $ (2,845,000 ) $ 240,871,000 $ (10,271,000 ) $ 393,730,000 $ (13,116,000 ) As of September 30, 2018 , there were 596 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 185 had been temporarily impaired for 12 months or more. Information regarding securities temporarily impaired as of September 30, 2018 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 $ 7,753,000 $ (247,000 ) $ 7,614,000 $ (541,000 ) $ 15,367,000 $ (788,000 ) Mortgage-backed securities 154,611,000 (4,333,000 ) 143,771,000 (7,427,000 ) 298,382,000 (11,760,000 ) State and political subdivisions 105,233,000 (3,255,000 ) 38,491,000 (4,305,000 ) 143,724,000 (7,560,000 ) $ 267,597,000 $ (7,835,000 ) $ 189,876,000 $ (12,273,000 ) $ 457,473,000 $ (20,108,000 ) 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 $189,000 at September 30, 2019 . 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 September 30, 2019 and 2018 , and December 31, 2018 , the Bank's investment in FHLB stock totaled $7,945,000 , $10,549,000 and $10,549,000 , 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 September 30, 2019 . The Company will continue to monitor its investment in FHLB stock.

Loans

Loans	9 Months Ended
	Sep. 30, 2019
Loans and Leases Receivable Disclosure [Abstract]
Loans	Loans The following table shows the composition of the Company's loan portfolio as of September 30, 2019 and 2018 and at December 31, 2018 : September 30, 2019 December 31, 2018 September 30, 2018 Commercial Real estate $ 368,165,000 29.1 % $ 353,243,000 28.5 % $ 366,390,000 29.5 % Construction 37,242,000 2.9 % 27,304,000 2.2 % 23,889,000 1.9 % Other 201,859,000 16.0 % 196,391,000 15.9 % 188,128,000 15.1 % Municipal 36,522,000 2.9 % 51,128,000 4.1 % 56,704,000 4.6 % Residential Term 485,490,000 38.4 % 469,145,000 37.9 % 459,449,000 36.8 % Construction 14,118,000 1.1 % 17,743,000 1.4 % 18,166,000 1.5 % Home equity line of credit 94,144,000 7.5 % 98,469,000 8.0 % 105,213,000 8.5 % Consumer 25,919,000 2.1 % 24,860,000 2.0 % 25,619,000 2.1 % Total $ 1,263,459,000 100.0 % $ 1,238,283,000 100.0 % $ 1,243,558,000 100.0 % Loan balances include net deferred loan costs of $7,181,000 as of September 30, 2019 , $6,615,000 as of December 31, 2018 , and $6,428,000 as of September 30, 2018 . Pursuant to collateral agreements, qualifying first mortgage loans and commercial real estate loans, which totaled $308,163,000 at September 30, 2019 , were used to collateralize borrowings from the FHLB. This compares to qualifying loans which totaled $290,138,000 at December 31, 2018 , and $311,152,000 at September 30, 2018 . In addition, commercial, construction and home equity loans totaling $254,076,000 at September 30, 2019 , $237,152,000 at December 31, 2018 , and $229,769,000 at September 30, 2018 , were used to collateralize a standby line of credit at the Federal Reserve Bank of Boston that is currently unused. 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 September 30, 2019 , is presented in the following table: 30-59 Days Past Due 60-89 Days Past Due 90+ Days Past Due All Past Due Current Total 90+ Days & Accruing Commercial Real estate $ 305,000 $ 233,000 $ 661,000 $ 1,199,000 $ 366,966,000 $ 368,165,000 $ — Construction 14,000 279,000 — 293,000 36,949,000 37,242,000 — Other 35,000 289,000 339,000 663,000 201,196,000 201,859,000 — Municipal — — — — 36,522,000 36,522,000 — Residential Term 650,000 767,000 3,806,000 5,223,000 480,267,000 485,490,000 — Construction — — — — 14,118,000 14,118,000 — Home equity line of credit 693,000 306,000 868,000 1,867,000 92,277,000 94,144,000 — Consumer 234,000 317,000 18,000 569,000 25,350,000 25,919,000 18,000 Total $ 1,931,000 $ 2,191,000 $ 5,692,000 $ 9,814,000 $ 1,253,645,000 $ 1,263,459,000 $ 18,000 Information on the past-due status of loans by class of financing receivable as of December 31, 2018 , is presented in the following table: 30-59 Days Past Due 60-89 Days Past Due 90+ Days Past Due All Past Due Current Total 90+ Days & Accruing Commercial Real estate $ 1,274,000 $ — $ 777,000 $ 2,051,000 $ 351,192,000 $ 353,243,000 $ — Construction — 10,000 — 10,000 27,294,000 27,304,000 — Other 455,000 5,000 120,000 580,000 195,811,000 196,391,000 — Municipal — — — — 51,128,000 51,128,000 — Residential Term 1,097,000 3,518,000 2,023,000 6,638,000 462,507,000 469,145,000 339,000 Construction 76,000 — — 76,000 17,667,000 17,743,000 — Home equity line of credit 2,819,000 419,000 493,000 3,731,000 94,738,000 98,469,000 — Consumer 237,000 25,000 27,000 289,000 24,571,000 24,860,000 12,000 Total $ 5,958,000 $ 3,977,000 $ 3,440,000 $ 13,375,000 $ 1,224,908,000 $ 1,238,283,000 $ 351,000 Information on the past-due status of loans by class of financing receivable as of September 30, 2018 , is presented in the following table: 30-59 Days Past Due 60-89 Days Past Due 90+ Days Past Due All Past Due Current Total 90+ Days & Accruing Commercial Real estate $ 305,000 $ — $ 503,000 $ 808,000 $ 365,582,000 $ 366,390,000 $ — Construction — — — — 23,889,000 23,889,000 — Other 440,000 526,000 416,000 1,382,000 186,746,000 188,128,000 — Municipal — — — — 56,704,000 56,704,000 — Residential Term 838,000 2,701,000 1,566,000 5,105,000 454,344,000 459,449,000 199,000 Construction — — — — 18,166,000 18,166,000 — Home equity line of credit 1,883,000 403,000 565,000 2,851,000 102,362,000 105,213,000 — Consumer 161,000 14,000 52,000 227,000 25,392,000 25,619,000 50,000 Total $ 3,627,000 $ 3,644,000 $ 3,102,000 $ 10,373,000 $ 1,233,185,000 $ 1,243,558,000 $ 249,000 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 September 30, 2019 and 2018 and at December 31, 2018 is presented in the following table: September 30, 2019 December 31, 2018 September 30, 2018 Commercial Real estate $ 1,807,000 $ 1,226,000 $ 964,000 Construction 256,000 — — Other 6,871,000 8,664,000 9,330,000 Municipal — — — Residential Term 6,840,000 4,062,000 3,042,000 Construction — — — Home equity line of credit 1,078,000 760,000 834,000 Consumer 6,000 15,000 2,000 Total $ 16,858,000 $ 14,727,000 $ 14,172,000 Impaired loans include troubled debt restructured ("TDR") 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 September 30, 2019 is presented in the following table: For the nine months ended September 30, 2019 For the quarter ended September 30, 2019 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Recognized Interest Income Average Recorded Investment Recognized Interest Income With No Related Allowance Commercial Real estate $ 7,332,000 $ 7,630,000 $ — $ 7,929,000 $ 266,000 $ 7,242,000 $ 83,000 Construction 978,000 990,000 — 929,000 35,000 980,000 12,000 Other 892,000 930,000 — 997,000 22,000 921,000 8,000 Municipal — — — — — — — Residential Term 10,664,000 12,305,000 — 9,877,000 202,000 10,487,000 63,000 Construction — — — — — — — Home equity line of credit 827,000 883,000 — 965,000 16,000 917,000 6,000 Consumer — — — — — — — $ 20,693,000 $ 22,738,000 $ — $ 20,697,000 $ 541,000 $ 20,547,000 $ 172,000 With an Allowance Recorded Commercial Real estate $ 1,717,000 $ 1,732,000 $ 258,000 $ 1,538,000 $ 72,000 $ 1,721,000 $ 23,000 Construction — — — — — — — Other 6,440,000 6,949,000 1,275,000 6,918,000 1,000 6,465,000 1,000 Municipal — — — — — — — Residential Term 2,782,000 3,121,000 337,000 2,306,000 61,000 2,858,000 25,000 Construction — — — — — — — Home equity line of credit 571,000 590,000 184,000 99,000 — 248,000 — Consumer 6,000 6,000 6,000 1,000 — 2,000 — $ 11,516,000 $ 12,398,000 $ 2,060,000 $ 10,862,000 $ 134,000 $ 11,294,000 $ 49,000 Total Commercial Real estate $ 9,049,000 $ 9,362,000 $ 258,000 $ 9,467,000 $ 338,000 $ 8,963,000 $ 106,000 Construction 978,000 990,000 — 929,000 35,000 980,000 12,000 Other 7,332,000 7,879,000 1,275,000 7,915,000 23,000 7,386,000 9,000 Municipal — — — — — — — Residential Term 13,446,000 15,426,000 337,000 12,183,000 263,000 13,345,000 88,000 Construction — — — — — — — Home equity line of credit 1,398,000 1,473,000 184,000 1,064,000 16,000 1,165,000 6,000 Consumer 6,000 6,000 6,000 1,000 — 2,000 — $ 32,209,000 $ 35,136,000 $ 2,060,000 $ 31,559,000 $ 675,000 $ 31,841,000 $ 221,000 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, 2018 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 $ 8,718,000 $ 9,161,000 $ — $ 5,536,000 $ 380,000 Construction 721,000 721,000 — 762,000 43,000 Other 1,468,000 1,555,000 — 2,037,000 32,000 Municipal — — — — — Residential Term 9,136,000 10,317,000 — 9,427,000 289,000 Construction — — — — — Home equity line of credit 972,000 1,035,000 — 1,001,000 20,000 Consumer 15,000 42,000 — 13,000 — $ 21,030,000 $ 22,831,000 $ — $ 18,776,000 $ 764,000 With an Allowance Recorded Commercial Real estate $ 1,042,000 $ 1,059,000 $ 260,000 $ 3,477,000 $ 42,000 Construction — — — — — Other 7,791,000 8,216,000 1,696,000 7,471,000 5,000 Municipal — — — — — Residential Term 1,768,000 1,998,000 335,000 1,982,000 53,000 Construction — — — — — Home equity line of credit 120,000 124,000 17,000 99,000 — Consumer — — — — — $ 10,721,000 $ 11,397,000 $ 2,308,000 $ 13,029,000 $ 100,000 Total Commercial Real estate $ 9,760,000 $ 10,220,000 $ 260,000 $ 9,013,000 $ 422,000 Construction 721,000 721,000 — 762,000 43,000 Other 9,259,000 9,771,000 1,696,000 9,508,000 37,000 Municipal — — — — — Residential Term 10,904,000 12,315,000 335,000 11,409,000 342,000 Construction — — — — — Home equity line of credit 1,092,000 1,159,000 17,000 1,100,000 20,000 Consumer 15,000 42,000 — 13,000 — $ 31,751,000 $ 34,228,000 $ 2,308,000 $ 31,805,000 $ 864,000 A breakdown of impaired loans by class of financing receivable as of and for the period ended September 30, 2018 is presented in the following table: For the nine months ended September 30, 2018 For the quarter ended September 30, 2018 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Recognized Interest Income Average Recorded Investment Recognized Interest Income With No Related Allowance Commercial Real estate $ 5,954,000 $ 6,275,000 $ — $ 5,099,000 $ 194,000 $ 5,966,000 $ 84,000 Construction 741,000 741,000 — 773,000 32,000 741,000 11,000 Other 1,926,000 2,044,000 — 2,146,000 25,000 1,865,000 8,000 Municipal — — — — — — — Residential Term 9,019,000 10,201,000 — 9,515,000 222,000 9,200,000 71,000 Construction — — — — — — — Home equity line of credit 1,068,000 1,128,000 — 1,014,000 15,000 1,033,000 6,000 Consumer — — — 14,000 — 10,000 — $ 18,708,000 $ 20,389,000 $ — $ 18,561,000 $ 488,000 $ 18,815,000 $ 180,000 With an Allowance Recorded Commercial Real estate $ 3,456,000 $ 3,474,000 $ 265,000 $ 3,700,000 $ 97,000 $ 3,461,000 $ 30,000 Construction — — — — — — — Other 7,923,000 8,231,000 1,890,000 7,345,000 — 7,682,000 — Municipal — — — — — — — Residential Term 1,909,000 2,085,000 238,000 2,054,000 70,000 2,108,000 22,000 Construction — — — — — — — Home equity line of credit 100,000 100,000 7,000 92,000 — 100,000 — Consumer 2,000 15,000 2,000 — — 1,000 — $ 13,390,000 $ 13,905,000 $ 2,402,000 $ 13,191,000 $ 167,000 $ 13,352,000 $ 52,000 Total Commercial Real estate $ 9,410,000 $ 9,749,000 $ 265,000 $ 8,799,000 $ 291,000 $ 9,427,000 $ 114,000 Construction 741,000 741,000 — 773,000 32,000 741,000 11,000 Other 9,849,000 10,275,000 1,890,000 9,491,000 25,000 9,547,000 8,000 Municipal — — — — — — — Residential Term 10,928,000 12,286,000 238,000 11,569,000 292,000 11,308,000 93,000 Construction — — — — — — — Home equity line of credit 1,168,000 1,228,000 7,000 1,106,000 15,000 1,133,000 6,000 Consumer 2,000 15,000 2,000 14,000 — 11,000 — $ 32,098,000 $ 34,294,000 $ 2,402,000 $ 31,752,000 $ 655,000 $ 32,167,000 $ 232,000 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 September 30, 2019 , the Company had 82 loans with a balance of $24,281,000 that have been classified as TDRs. This compares to 76 loans with a balance of $25,222,000 and 71 loans with a balance of $25,661,000 classified as TDRs as of December 31, 2018 and September 30, 2018 , 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 September 30, 2019 : Number of Loans Balance Specific Reserves Commercial Real estate 19 $ 7,559,000 $ 249,000 Construction 1 721,000 — Other 7 6,951,000 1,232,000 Municipal — — — Residential Term 52 8,563,000 202,000 Construction — — — Home equity line of credit 3 487,000 — Consumer — — — 82 $ 24,281,000 $ 1,683,000 The following table shows TDRs by class and the specific reserve as of December 31, 2018 : Number of Loans Balance Specific Reserves Commercial Real estate 17 $ 8,631,000 $ 132,000 Construction 1 721,000 — Other 10 7,298,000 1,276,000 Municipal — — — Residential Term 45 8,074,000 160,000 Construction — — — Home equity line of credit 3 498,000 — Consumer — — — 76 $ 25,222,000 $ 1,568,000 The following table shows TDRs by class and the specific reserve as of September 30, 2018 : Number of Loans Balance Specific Reserves Commercial Real estate 16 $ 8,542,000 $ 138,000 Construction 1 741,000 — Other 5 7,007,000 1,100,000 Municipal — — — Residential Term 46 8,869,000 238,000 Construction — — — Home equity line of credit 3 502,000 — Consumer — — — 71 $ 25,661,000 $ 1,476,000 As of September 30, 2019 , nine of the loans classified as TDRs with a total balance of $1,084,000 were more than 30 days past due. Of these loans, four 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 September 30, 2019 : Number of Loans Balance Specific Reserves Commercial Real estate — $ — $ — Construction — — — Other 3 251,000 131,000 Municipal — — — Residential Term 5 666,000 11,000 Construction — — — Home equity line of credit 1 167,000 — Consumer — — — 9 $ 1,084,000 $ 142,000 As of September 30, 2018 , 10 of the loans classified as TDRs with a total balance of $1,271,000 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 September 30, 2018 : Number of Loans Balance Specific Reserves Commercial Real estate — $ — $ — Construction — — — Other 1 138,000 — Municipal — — — Residential Term 8 966,000 5,000 Construction — — — Home equity line of credit 1 167,000 — Consumer — — — 10 $ 1,271,000 $ 5,000 For the nine months ended September 30, 2019 , 10 loans were placed on TDR status. The following table shows these TDRs by class and the associated specific reserves included in the allowance for loan losses as of September 30, 2019 : Number of Loans Pre-Modification Post-Modification Outstanding Specific Reserves Commercial Real estate 2 $ 110,000 $ 95,000 $ 95,000 Construction — — — — Other — — — — Municipal — — — — Residential Term 8 998,000 882,000 73,000 Construction — — — — Home equity line of credit — — — — Consumer — — — — 10 $ 1,108,000 $ 977,000 $ 168,000 For the nine months ended September 30, 2018 , 11 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 September 30, 2018 : Number of Loans Pre-Modification Post-Modification Outstanding Specific Reserves Commercial Real estate 8 $ 1,608,000 $ 1,606,000 $ 42,000 Construction — — — — Other 1 6,727,000 6,487,000 1,100,000 Municipal — — — — Residential Term 2 441,000 436,000 26,000 Construction — — — — Home equity line of credit — — — — Consumer — — — — 11 $ 8,776,000 $ 8,529,000 $ 1,168,000 For the quarter ended September 30, 2019 , two loans were placed on TDR status. The following table shows these TDRs by class and the associated specific reserves included in the allowance for loan losses as of September 30, 2019 : Number of Loans Pre-Modification Post-Modification Outstanding Specific Reserves Commercial Real estate — $ — $ — $ — Construction — — — — Other — — — — Municipal — — — — Residential Term 2 317,000 276,000 — Construction — — — — Home equity line of credit — — — — Consumer — — — — 2 $ 317,000 $ 276,000 $ — For the quarter ended September 30, 2018 , one loan was placed on TDR status. The following table shows these TDRs by class and the associated specific reserves included in the allowance for loan losses as of September 30, 2018 : Number of Loans Pre-Modification Post-Modification Outstanding Specific Reserves Commercial Real estate 1 $ 552,000 $ 552,000 $ — Construction — — — — Other — — — — Municipal — — — — Residential Term — — — — Construction — — — — Home equity line of credit — — — — Consumer — — — — 1 $ 552,000 $ 552,000 $ — As of September 30, 2019 , Management is aware of nine loans classified as TDRs that are involved in bankruptcy with an outstanding balance of $1,004,000 . There were also 26 loans with an outstanding balance of $8,932,000 that were classified as TDRs and on non-accrual status, of which three loans with an outstanding balance of $398,000 were in the process of foreclosure. Residential Mortgage Loans in Process of Foreclosure As of September 30, 2019 , there were 15 mortgage loans collateralized by residential real estate in the process of foreclosure with a total balance of $ 1,649,000 . This compares to 14 mortgage loans collateralized by residential real estate in the process of foreclosure with a total balance of $1,337,000 as of September 30, 2018 .

Allowance for Loan Losses

Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2019
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 are impacted by factors similar to those for residential real estate term 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 September 30, 2019 , December 31, 2018 , and September 30, 2018 , by class of financing receivable and allowance element, is presented in the following tables: As of September 30, 2019 Specific Reserves on Loans Evaluated Individually for Impairment General Reserves on Loans Based on Historical Loss Experience Reserves for Qualitative Factors Unallocated Reserves Total Reserves Commercial Real estate $ 258,000 $ 792,000 $ 2,745,000 $ — $ 3,795,000 Construction — 79,000 274,000 — 353,000 Other 1,275,000 436,000 1,509,000 — 3,220,000 Municipal — — 26,000 — 26,000 Residential Term 337,000 185,000 615,000 — 1,137,000 Construction — 5,000 18,000 — 23,000 Home equity line of credit 184,000 155,000 485,000 — 824,000 Consumer 6,000 285,000 389,000 — 680,000 Unallocated — — — 1,707,000 1,707,000 $ 2,060,000 $ 1,937,000 $ 6,061,000 $ 1,707,000 $ 11,765,000 As of December 31, 2018 Specific Reserves on Loans Evaluated Individually for Impairment General Reserves on Loans Based on Historical Loss Experience Reserves for Qualitative Factors Unallocated Reserves Total Reserves Commercial Real estate $ 260,000 $ 742,000 $ 2,565,000 $ — $ 3,567,000 Construction — 57,000 198,000 — 255,000 Other 1,696,000 414,000 1,431,000 — 3,541,000 Municipal — — 24,000 — 24,000 Residential Term 335,000 326,000 574,000 — 1,235,000 Construction — 12,000 22,000 — 34,000 Home equity line of credit 17,000 263,000 450,000 — 730,000 Consumer — 271,000 359,000 — 630,000 Unallocated — — — 1,216,000 1,216,000 $ 2,308,000 $ 2,085,000 $ 5,623,000 $ 1,216,000 $ 11,232,000 As of September 30, 2018 Specific Reserves on Loans Evaluated Individually for Impairment General Reserves on Loans Based on Historical Loss Experience Reserves for Qualitative Factors Unallocated Reserves Total Reserves Commercial Real estate $ 265,000 $ 758,000 $ 2,566,000 $ — $ 3,589,000 Construction — 49,000 165,000 — 214,000 Other 1,890,000 388,000 1,313,000 — 3,591,000 Municipal — — 23,000 — 23,000 Residential Term 238,000 313,000 541,000 — 1,092,000 Construction — 13,000 23,000 — 36,000 Home equity line of credit 7,000 280,000 432,000 — 719,000 Consumer 2,000 397,000 341,000 — 740,000 Unallocated — — — 1,678,000 1,678,000 $ 2,402,000 $ 2,198,000 $ 5,404,000 $ 1,678,000 $ 11,682,000 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 0.48% of related loans as of September 30, 2019 , compared to 0.45% of related loans as of December 31, 2018 . The qualitative portion increased $438,000 between December 31, 2018 and September 30, 2019 due to a mix of factors. The unallocated component of the allowance totaled $1,707,000 at September 30, 2019 , or 14.5% of the total reserve. This compares to $1,216,000 or 10.8% as of December 31, 2018 . The change supported general imprecision related to portfolio growth and includes consideration of general economic and business conditions affecting our lending area, credit quality trends (including trends in delinquencies and nonperforming loans expected to result from existing conditions), loan volumes and concentrations, duration of the current business cycle, bank regulatory examination results, findings of external loan review examiners, and Management's judgment with respect to various other conditions including loan administration and management and the quality of risk identification systems. Consequently, there maybe underlying credit risks that have not yet surfaced in the loan specific or qualitative metrics the Company uses to estimate its allowance for loan losses that are reflected in the unallocated component. The allowance for loan losses as a percent of total loans stood at 0.93% as of September 30, 2019 , 0.91% at December 31, 2018 and 0.94% as of September 30, 2018 . 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. 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 27.6% of capital are below the regulatory guidance limit of 100.0% of capital at September 30, 2019 . Construction loans and non-owner-occupied commercial real estate loans are at 123.7% of total capital, below the regulatory limit of 300.0% of capital at September 30, 2019 . 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 September 30, 2019 : Commercial Real Estate Commercial Construction Commercial Other Municipal Loans All Risk- Rated Loans 1 Strong $ — $ — $ 3,835,000 $ 35,000 $ 3,870,000 2 Above Average 12,595,000 34,000 5,836,000 33,768,000 52,233,000 3 Satisfactory 84,567,000 2,154,000 45,742,000 386,000 132,849,000 4 Average 186,605,000 20,931,000 85,485,000 2,333,000 295,354,000 5 Watch 67,674,000 13,867,000 48,498,000 — 130,039,000 6 OAEM 504,000 — 2,070,000 — 2,574,000 7 Substandard 16,220,000 256,000 10,393,000 — 26,869,000 8 Doubtful — — — — — Total $ 368,165,000 $ 37,242,000 $ 201,859,000 $ 36,522,000 $ 643,788,000 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, 2018 : Commercial Real Estate Commercial Construction Commercial Other Municipal Loans All Risk- Rated Loans 1 Strong $ — $ — $ 3,444,000 $ — $ 3,444,000 2 Above Average 10,484,000 37,000 4,564,000 48,800,000 63,885,000 3 Satisfactory 80,266,000 2,231,000 46,090,000 518,000 129,105,000 4 Average 172,597,000 18,780,000 82,081,000 1,810,000 275,268,000 5 Watch 66,325,000 5,970,000 45,546,000 — 117,841,000 6 OAEM 6,890,000 — 1,805,000 — 8,695,000 7 Substandard 16,558,000 286,000 12,861,000 — 29,705,000 8 Doubtful 123,000 — — — 123,000 Total $ 353,243,000 $ 27,304,000 $ 196,391,000 $ 51,128,000 $ 628,066,000 The following table summarizes the risk ratings for the Company's commercial real estate, commercial construction, commercial other, and municipal loans as of September 30, 2018 : Commercial Real Estate Commercial Construction Commercial Other Municipal Loans All Risk- Rated Loans 1 Strong $ — $ — $ 2,558,000 $ — $ 2,558,000 2 Above Average 10,710,000 38,000 4,845,000 55,553,000 71,146,000 3 Satisfactory 78,794,000 1,810,000 44,888,000 552,000 126,044,000 4 Average 196,883,000 16,331,000 80,171,000 599,000 293,984,000 5 Watch 62,036,000 5,424,000 39,176,000 — 106,636,000 6 OAEM 1,387,000 — 1,368,000 — 2,755,000 7 Substandard 16,457,000 286,000 15,122,000 — 31,865,000 8 Doubtful 123,000 — — — 123,000 Total $ 366,390,000 $ 23,889,000 $ 188,128,000 $ 56,704,000 $ 635,111,000 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 nine months ended September 30, 2019 . The following table presents allowance for loan losses activity by class for the nine months and quarter ended September 30, 2019 , and allowance for loan loss balances by class and related loan balances by class as of September 30, 2019 : Commercial Municipal Residential Home Equity Line of Credit Consumer Unallocated Total Real Estate Construction Other Term Construction For the nine months ended September 30, 2019 Beginning balance $ 3,567,000 $ 255,000 $ 3,541,000 $ 24,000 $ 1,235,000 $ 34,000 $ 730,000 $ 630,000 $ 1,216,000 $ 11,232,000 Charge offs 53,000 — 123,000 — 93,000 — 38,000 235,000 — 542,000 Recoveries 15,000 — 70,000 — 10,000 — 3,000 102,000 — 200,000 Provision (credit) 266,000 98,000 (268,000 ) 2,000 (15,000 ) (11,000 ) 129,000 183,000 491,000 875,000 Ending balance $ 3,795,000 $ 353,000 $ 3,220,000 $ 26,000 $ 1,137,000 $ 23,000 $ 824,000 $ 680,000 $ 1,707,000 $ 11,765,000 For the three months ended September 30, 2019 Beginning balance $ 3,609,000 $ 309,000 $ 3,281,000 $ 25,000 $ 1,106,000 $ 23,000 $ 633,000 $ 649,000 $ 1,836,000 $ 11,471,000 Charge offs — — 14,000 — — — — 48,000 — 62,000 Recoveries 2,000 — 68,000 — 4,000 — 1,000 31,000 — 106,000 Provision (credit) 184,000 44,000 (115,000 ) 1,000 27,000 — 190,000 48,000 (129,000 ) 250,000 Ending balance $ 3,795,000 $ 353,000 $ 3,220,000 $ 26,000 $ 1,137,000 $ 23,000 $ 824,000 $ 680,000 $ 1,707,000 $ 11,765,000 Allowance for loan losses as of September 30, 2019 Ending balance specifically evaluated for impairment $ 258,000 $ — $ 1,275,000 $ — $ 337,000 $ — $ 184,000 $ 6,000 $ — $ 2,060,000 Ending balance collectively evaluated for impairment $ 3,537,000 $ 353,000 $ 1,945,000 $ 26,000 $ 800,000 $ 23,000 $ 640,000 $ 674,000 $ 1,707,000 $ 9,705,000 Related loan balances as of September 30, 2019 Ending balance $ 368,165,000 $ 37,242,000 $ 201,859,000 $ 36,522,000 $ 485,490,000 $ 14,118,000 $ 94,144,000 $ 25,919,000 $ — $ 1,263,459,000 Ending balance specifically evaluated for impairment $ 9,049,000 $ 978,000 $ 7,332,000 $ — $ 13,446,000 $ — $ 1,398,000 $ 6,000 $ — $ 32,209,000 Ending balance collectively evaluated for impairment $ 359,116,000 $ 36,264,000 $ 194,527,000 $ 36,522,000 $ 472,044,000 $ 14,118,000 $ 92,746,000 $ 25,913,000 $ — $ 1,231,250,000 The following table presents allowance for loan losses activity by class for the year ended December 31, 2018 and allowance for loan loss balances by class and related loan balances by class as of December 31, 2018 : Commercial Municipal Residential Home Equity Line of Credit Consumer Unallocated Total Real Estate Construction Other Term Construction For the year ended December 31, 2018 Beginning balance $ 3,872,000 $ 434,000 $ 3,358,000 $ 20,000 $ 1,130,000 $ 36,000 $ 692,000 $ 545,000 $ 642,000 $ 10,729,000 Charge offs 168,000 — 423,000 — 213,000 — 121,000 348,000 — 1,273,000 Recoveries 52,000 — 40,000 — 64,000 — 24,000 96,000 — 276,000 Provision (credit) (189,000 ) (179,000 ) 566,000 4,000 254,000 (2,000 ) 135,000 337,000 574,000 1,500,000 Ending balance $ 3,567,000 $ 255,000 $ 3,541,000 $ 24,000 $ 1,235,000 $ 34,000 $ 730,000 $ 630,000 $ 1,216,000 $ 11,232,000 Allowance for loan losses as of December 31, 2018 Ending balance specifically evaluated for impairment $ 260,000 $ — $ 1,696,000 $ — $ 335,000 $ — $ 17,000 $ — $ — $ 2,308,000 Ending balance collectively evaluated for impairment $ 3,307,000 $ 255,000 $ 1,845,000 $ 24,000 $ 900,000 $ 34,000 $ 713,000 $ 630,000 $ 1,216,000 $ 8,924,000 Related loan balances as of December 31, 2018 Ending balance $ 353,243,000 $ 27,304,000 $ 196,391,000 $ 51,128,000 $ 469,145,000 $ 17,743,000 $ 98,469,000 $ 24,860,000 $ — $ 1,238,283,000 Ending balance specifically evaluated for impairment $ 9,760,000 $ 721,000 $ 9,259,000 $ — $ 10,904,000 $ — $ 1,092,000 $ 15,000 $ — $ 31,751,000 Ending balance collectively evaluated for impairment $ 343,483,000 $ 26,583,000 $ 187,132,000 $ 51,128,000 $ 458,241,000 $ 17,743,000 $ 97,377,000 $ 24,845,000 $ — $ 1,206,532,000 The following table presents allowance for loan losses activity by class for the nine months and quarter ended September 30, 2018 , and allowance for loan loss balances by class and related loan balances by class as of September 30, 2018 : Commercial Municipal Residential Home Equity Line of Credit Consumer Unallocated Total Real Estate Construction Other Term Construction For the nine months ended September 30, 2018 Beginning balance $ 3,872,000 $ 434,000 $ 3,358,000 $ 20,000 $ 1,130,000 $ 36,000 $ 692,000 $ 545,000 $ 642,000 $ 10,729,000 Charge offs — — 68,000 — 212,000 — 121,000 195,000 — 596,000 Recoveries 52,000 — 33,000 — 45,000 — 13,000 73,000 — 216,000 Provision (credit) (335,000 ) (220,000 ) 268,000 3,000 129,000 — 135,000 317,000 1,036,000 1,333,000 Ending balance $ 3,589,000 $ 214,000 $ 3,591,000 $ 23,000 $ 1,092,000 $ 36,000 $ 719,000 $ 740,000 $ 1,678,000 $ 11,682,000 For the three months ended September 30, 2018 Beginning balance $ 3,732,000 $ 399,000 $ 3,475,000 $ 21,000 $ 1,138,000 $ 29,000 $ 678,000 $ 575,000 $ 1,425,000 $ 11,472,000 Charge offs — — 51,000 — 116,000 — 6,000 50,000 — 223,000 Recoveries 52,000 — 23,000 — 3,000 — — 22,000 — 100,000 Provision (credit) (195,000 ) (185,000 ) 144,000 2,000 67,000 7,000 47,000 193,000 253,000 333,000 Ending balance $ 3,589,000 $ 214,000 $ 3,591,000 $ 23,000 $ 1,092,000 $ 36,000 $ 719,000 $ 740,000 $ 1,678,000 $ 11,682,000 Allowance for loan losses as of September 30, 2018 Ending balance specifically evaluated for impairment $ 265,000 $ — $ 1,890,000 $ — $ 238,000 $ — $ 7,000 $ 2,000 $ — $ 2,402,000 Ending balance collectively evaluated for impairment $ 3,324,000 $ 214,000 $ 1,701,000 $ 23,000 $ 854,000 $ 36,000 $ 712,000 $ 738,000 $ 1,678,000 $ 9,280,000 Related loan balances as of September 30, 2018 Ending balance $ 366,390,000 $ 23,889,000 $ 188,128,000 $ 56,704,000 $ 459,449,000 $ 18,166,000 $ 105,213,000 $ 25,619,000 $ — $ 1,243,558,000 Ending balance specifically evaluated for impairment $ 9,410,000 $ 741,000 $ 9,849,000 $ — $ 10,928,000 $ — $ 1,168,000 $ 2,000 $ — $ 32,098,000 Ending balance collectively evaluated for impairment $ 356,980,000 $ 23,148,000 $ 178,279,000 $ 56,704,000 $ 448,521,000 $ 18,166,000 $ 104,045,000 $ 25,617,000 $ — $ 1,211,460,000

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2019
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"). This 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 our business. 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 2010 Plan will qualify for treatment as incentive stock options for purposes of Section 422 of the Internal Revenue Code. Other compensation under the 2010 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 September 30, 2019 , 162,892 shares of restricted stock had been granted under the 2010 Plan, of which 75,254 shares remain restricted as of September 30, 2019 as detailed in the following table: Year Granted Vesting Term (In Years) Shares Remaining Term (In Years) 2015 5.0 12,023 0.3 2016 5.0 15,015 1.3 2017 3.0 4,602 0.4 2017 5.0 9,972 2.3 2018 2.0 932 0.3 2018 3.0 1,900 1.4 2018 4.0 2,068 2.3 2018 5.0 9,655 3.3 2019 1.0 1,349 0.3 2019 2.0 1,484 1.3 2019 3.0 16,254 2.3 75,254 1.6 The compensation cost related to these restricted stock grants is $1,785,000 and is recognized over the vesting terms of each grant. In the nine months ended September 30, 2019 , $368,000 of expense was recognized for these restricted shares, leaving $797,000 in unrecognized expense as of September 30, 2019 . In the nine months ended September 30, 2018 , $285,000 of expense was recognized for restricted shares, leaving $774,000 in unrecognized expense as of September 30, 2018 .

Preferred and Common Stock

Preferred and Common Stock	9 Months Ended
	Sep. 30, 2019
Stockholders' Equity Note [Abstract]
Preferred and Common Stock	Preferred and Common Stock Preferred Stock The Company does not have any preferred stock. Common Stock Proceeds from sale of common stock totaled $488,000 and $466,000 for the nine months ended September 30, 2019 and 2018 , respectively.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2019
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 nine months ended September 30, 2019 and 2018 : Income (Numerator) Shares (Denominator) Per-Share Amount For the nine months ended September 30, 2019 Net income as reported $ 18,839,000 Basic EPS: Income available to common shareholders 18,839,000 10,811,233 $ 1.74 Effect of dilutive securities: restricted stock 75,013 Diluted EPS: Income available to common shareholders plus assumed conversions $ 18,839,000 10,886,246 $ 1.73 For the nine months ended September 30, 2018 Net income as reported $ 17,173,000 Basic EPS: Income available to common shareholders 17,173,000 10,780,277 $ 1.59 Effect of dilutive securities: restricted stock 69,515 Diluted EPS: Income available to common shareholders plus assumed conversions $ 17,173,000 10,849,792 $ 1.58 The following table sets forth the computation of basic diluted EPS for the quarters ended September 30, 2019 and 2018 . Income (Numerator) Shares (Denominator) Per-Share Amount For the quarter ended September 30, 2019 Net income as reported $ 6,288,000 Basic EPS: Income available to common shareholders 6,288,000 10,818,423 $ 0.58 Effect of dilutive securities: restricted stock 75,493 Diluted EPS: Income available to common shareholders plus assumed conversions $ 6,288,000 10,893,916 $ 0.58 For the quarter ended September 30, 2018 Net income as reported $ 5,933,000 Basic EPS: Income available to common shareholders 5,933,000 10,785,528 $ 0.55 Effect of dilutive securities: restricted stock 69,515 Diluted EPS: Income available to common shareholders plus assumed conversions $ 5,933,000 10,855,043 $ 0.55

Employee Benefit Plans

Employee Benefit Plans	9 Months Ended
	Sep. 30, 2019
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 2.0% of each eligible employee's compensation in 2018 . The amount for 2019 has not been established. The expense related to the 401(k) plan was $464,000 and $414,000 for the nine months ended September 30, 2019 and 2018 , 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 $121,000 for the nine months ended September 30, 2019 and $129,000 for the the same period in 2018 . As of September 30, 2019 , the associated accrued liability included in other liabilities in the balance sheet was $2,831,000 compared to $2,949,000 and $2,973,000 at December 31, 2018 and September 30, 2018 , 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 nine months ended September 30, 2019 2018 Change in benefit obligation Benefit obligation at beginning of year $ 1,599,000 $ 1,874,000 Interest cost 50,000 57,000 Benefits paid (85,000 ) (84,000 ) Benefit obligation at end of period $ 1,564,000 $ 1,847,000 Funded status Benefit obligation at end of period $ (1,564,000 ) $ (1,847,000 ) Unamortized (gain) loss (47,000 ) 186,000 Accrued benefit cost at end of period $ (1,611,000 ) $ (1,661,000 ) The following table sets forth the net periodic pension cost: For the nine months ended September 30, For the quarter ended September 30, 2019 2018 2019 2018 Components of net periodic benefit cost Interest cost $ 50,000 $ 57,000 $ 17,000 $ 19,000 Net periodic benefit cost $ 50,000 $ 57,000 $ 17,000 $ 19,000 Amounts not yet reflected in net periodic benefit cost and included in accumulated other comprehensive income (loss) are as follows: September 30, December 31, 2018 September 30, Unamortized net actuarial gain (loss) $ 47,000 $ 47,000 $ (186,000 ) Deferred tax benefit (expense) (10,000 ) (10,000 ) 39,000 Net unrecognized postretirement benefits included in accumulated other comprehensive income (loss) $ 37,000 $ 37,000 $ (147,000 ) A weighted average discount rate of 4.25% 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 2019 are $113,000 . Plan expense for 2019 is estimated to be $66,000 . 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)	9 Months Ended
	Sep. 30, 2019
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 nine months and quarter ended September 30, 2019 and 2018 . For the nine months ended September 30, For the quarter ended September 30, 2019 2018 2019 2018 Balance at beginning of period $ (5,051,000 ) $ (2,901,000 ) $ 2,750,000 $ (7,245,000 ) Unrealized gains (losses) arising during the period 11,074,000 (7,753,000 ) 1,199,000 (2,390,000 ) Reclassification of net realized gains during the period (15,000 ) (137,000 ) (15,000 ) (1,000 ) Related deferred taxes (2,322,000 ) 1,658,000 (248,000 ) 503,000 Net change 8,737,000 (6,232,000 ) 936,000 (1,888,000 ) Balance at end of period $ 3,686,000 $ (9,133,000 ) $ 3,686,000 $ (9,133,000 ) 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 nine months and quarter ended September 30, 2019 and 2018 . For the nine months ended September 30, For the quarter ended September 30, 2019 2018 2019 2018 Balance at beginning of period $ (197,000 ) $ (174,000 ) $ (190,000 ) $ (189,000 ) Amortization of net unrealized gains (losses) 10,000 (25,000 ) 1,000 (6,000 ) Related deferred taxes (2,000 ) 5,000 — 1,000 Net change 8,000 (20,000 ) 1,000 (5,000 ) Balance at end of period $ (189,000 ) $ (194,000 ) $ (189,000 ) $ (194,000 ) The following table presents the effect of the Company's derivative financial instruments included in other comprehensive income (loss) for the nine months and quarter ended September 30, 2019 and 2018 . For the nine months ended September 30, For the quarter ended September 30, 2019 2018 2019 2018 Balance at beginning of period $ 1,438,000 $ 1,544,000 $ 75,000 $ 2,066,000 Unrealized gains (losses) on cash flow hedging derivatives arising during the period (2,156,000 ) 934,000 (430,000 ) 273,000 Related deferred taxes 453,000 (196,000 ) 90,000 (57,000 ) Net change (1,703,000 ) 738,000 (340,000 ) 216,000 Balance at end of period $ (265,000 ) $ 2,282,000 $ (265,000 ) $ 2,282,000 The following table summarizes activity in the unrealized gain or loss on postretirement benefits included in other comprehensive income (loss) for the nine months and quarter ended September 30, 2019 and 2018 . For the nine months ended September 30, For the quarter ended September 30, 2019 2018 2019 2018 Unrecognized postretirement benefits at beginning of period $ 37,000 $ (147,000 ) $ 37,000 $ (147,000 ) Amortization of unrecognized transition obligation — — — — Change in unamortized net actuarial gain (loss) — — — — Related deferred taxes — — — — Unrecognized postretirement benefits at end of period $ 37,000 $ (147,000 ) $ 37,000 $ (147,000 )

Financial Derivative Instrument

Financial Derivative Instruments	9 Months Ended
	Sep. 30, 2019
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: September 30, 2019 December 31, 2018 Effective Date Maturity Date Variable Index Received Fixed Rate Paid Presentation on Consolidated Balance Sheet Notional Amount Fair Value Notional Amount Fair Value 06/27/2016 06/27/2021 1-Month USD LIBOR 0.893 % Other Assets $ 20,000,000 $ 214,000 $ 20,000,000 $ 763,000 06/28/2016 06/28/2021 1-Month USD LIBOR 0.940 % Other Assets 30,000,000 296,000 30,000,000 1,110,000 06/05/2018 12/05/2019 1-Month USD LIBOR 2.466 % Other Liabilities/Other Assets 25,000,000 (23,000 ) 25,000,000 16,000 06/05/2018 06/05/2020 1-Month USD LIBOR 2.547 % Other Liabilities 25,000,000 (140,000 ) 25,000,000 (9,000 ) 06/05/2018 12/05/2020 1-Month USD LIBOR 2.603 % Other Liabilities 25,000,000 (300,000 ) 25,000,000 (60,000 ) 12/05/2019 12/05/2022 3-Month USD LIBOR 1.779 % Other Liabilities 25,000,000 (217,000 ) — — 08/02/2019 08/02/2024 1-Month USD Libor 1.590 % Other Liabilities 12,500,000 (133,000 ) — — 08/05/2019 08/05/2024 1-Month USD Libor 1.420 % Other Liabilities 12,500,000 (32,000 ) — — $ 175,000,000 $ (335,000 ) $ 125,000,000 $ 1,820,000 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 statement of income, and in interest paid in the statement of cash flows. Customer loan derivatives The Company 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. The Company 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 customer 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 September 30, 2019 , the Bank posted to the counterparty $3,050,000 of cash as collateral on its customer loan swap contracts. At September 30, 2019 there was one customer loan swap arrangement in place, detailed below: September 30, 2019 December 31, 2018 Presentation on Consolidated Balance Sheet Number of Positions Notional Amount Fair Value Number of Positions Notional Amount Fair Value Pay Fixed, Receive Variable Other Liabilities 1 $ 12,914,000 $ (1,643,000 ) — — — Receive Fixed, Pay Variable Other Assets 1 12,914,000 1,643,000 — — — Total 2 $ 25,828,000 — — — — The Company is aware that LIBOR may no longer be published after December 31, 2021 and is monitoring the introduction and market acceptance of replacement indices. Five of the interest rate swap contracts the Company has in place are set to mature by December 31, 2021, three contracts have maturity dates beyond December 31, 2021. The one customer loan swap contract has a maturity date of October 1, 2039.

Mortgage Servicing Rights

Mortgage Servicing Rights	9 Months Ended
	Sep. 30, 2019
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 September 30, 2019 , the prepayment assumption using the PSA model was 204 , which translates into an anticipated prepayment rate of 12.24% . The discount rate is 9.50% . 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 nine months ended September 30, 2019 and 2018 , servicing rights capitalized totaled $267,000 and $184,000 , respectively. Servicing rights amortized for the nine-month periods ended September 30, 2019 and 2018 were $170,000 and $152,000 , respectively. The fair value of servicing rights was $2,083,000 , $2,586,000 and $2,572,000 at September 30, 2019 , December 31, 2018 and September 30, 2018 , respectively. The Bank serviced loans for others totaling $261,685,000 , $261,654,000 and $257,584,000 at September 30, 2019 , December 31, 2018 , and September 30, 2018 , respectively. Mortgage servicing rights are included in other assets and detailed in the following table: September 30, December 31, September 30, Mortgage servicing rights $ 5,985,000 $ 5,718,000 $ 5,611,000 Accumulated amortization (4,534,000 ) (4,364,000 ) (4,312,000 ) $ 1,451,000 $ 1,354,000 $ 1,299,000

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes FASB 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, 2016 through 2018.

Certificates of Deposit

Certificates of Deposit	9 Months Ended
	Sep. 30, 2019
Banking and Thrift [Abstract]
Certificates of Deposit	Certificates of Deposit The following table represents the breakdown of certificates of deposit at September 30, 2019 and 2018 , and at December 31, 2018 : September 30, 2019 December 31, 2018 September 30, 2018 Certificates of deposit < $100,000 $ 319,292,000 $ 372,464,000 $ 389,317,000 Certificates $100,000 to $250,000 278,050,000 162,185,000 168,402,000 Certificates $250,000 and over 64,431,000 56,760,000 61,690,000 $ 661,773,000 $ 591,409,000 $ 619,409,000

Reclassifications

Reclassifications	9 Months Ended
	Sep. 30, 2019
Accounting Changes and Error Corrections [Abstract]
Reclassifications	Reclassifications Certain items from the prior year were reclassified in the 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	9 Months Ended
	Sep. 30, 2019
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. The carrying values of restricted equity securities approximate fair values. As such, the Company classifies investment securities as Level 2. 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 September 30, 2019 and 2018 , and December 31, 2018 , 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 September 30, 2019 , December 31, 2018 and September 30, 2018 . At September 30, 2019 Level 1 Level 2 Level 3 Total Securities available for sale Mortgage-backed securities $ — $ 322,190,000 $ — $ 322,190,000 State and political subdivisions — 4,608,000 — 4,608,000 Total securities available for sale — 326,798,000 — 326,798,000 Interest rate swap agreements — 510,000 — 510,000 Customer loan interest swap agreements — 1,643,000 — 1,643,000 Total interest rate swap agreements $ — $ 2,153,000 $ — $ 2,153,000 Total assets $ — $ 328,951,000 $ — $ 328,951,000 At September 30, 2019 Level 1 Level 2 Level 3 Total Interest rate swap agreements $ — $ 845,000 $ — $ 845,000 Customer loan interest swap agreements — 1,643,000 — 1,643,000 Total liabilities $ — $ 2,488,000 $ — $ 2,488,000 At December 31, 2018 Level 1 Level 2 Level 3 Total Securities available for sale U.S. Government-sponsored agencies $ — $ 5,007,000 $ — $ 5,007,000 Mortgage-backed securities — 307,693,000 — 307,693,000 State and political subdivisions — 4,716,000 — 4,716,000 Total securities available for sale — 317,416,000 — 317,416,000 Interest rate swap agreements — 1,889,000 — 1,889,000 Total assets $ — $ 319,305,000 $ — $ 319,305,000 At December 31, 2018 Level 1 Level 2 Level 3 Total Interest rate swap agreements $ — $ 69,000 $ — $ 69,000 Total liabilities $ — $ 69,000 $ — $ 69,000 At September 30, 2018 Level 1 Level 2 Level 3 Total Securities available for sale U.S. Treasury and agency $ — $ 4,979,000 $ — $ 4,979,000 Mortgage-backed securities $ — $ 292,570,000 $ — $ 292,570,000 State and political subdivisions — 4,638,000 — 4,638,000 Total securities available for sale — 302,187,000 — 302,187,000 Interest rate swap agreements — 2,888,000 — 2,888,000 Total assets $ — $ 305,075,000 $ — $ 305,075,000 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. Other real estate owned is presented net of an allowance of $0 at September 30, 2019 , 2018 and December 31, 2018. 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 $1,763,000 , $2,096,000 and $2,109,000 at September 30, 2019 , December 31, 2018 , and September 30, 2018 , respectively. At September 30, 2019 Level 1 Level 2 Level 3 Total Other real estate owned $ — $ 279,000 $ — $ 279,000 Impaired loans — 7,143,000 — 7,143,000 Total assets $ — $ 7,422,000 $ — $ 7,422,000 At December 31, 2018 Level 1 Level 2 Level 3 Total Other real estate owned $ — $ 584,000 $ — $ 584,000 Impaired loans — 7,415,000 — 7,415,000 Total assets $ — $ 7,999,000 $ — $ 7,999,000 At September 30, 2018 Level 1 Level 2 Level 3 Total Other real estate owned $ — $ 584,000 $ — $ 584,000 Impaired loans — 7,024,000 — 7,024,000 Total assets $ — $ 7,608,000 $ — $ 7,608,000 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 September 30, 2019 were as follows: Carrying value Estimated fair value Level 1 Level 2 Level 3 Financial assets Securities to be held to maturity $ 298,786,000 $ 306,647,000 $ — $ 306,647,000 $ — Loans (net of allowance for loan losses) Commercial Real estate 363,725,000 360,061,000 — 622,000 359,439,000 Construction 36,829,000 36,458,000 — — 36,458,000 Other 198,093,000 196,674,000 — 5,142,000 191,532,000 Municipal 36,492,000 36,192,000 — — 36,192,000 Residential Term 484,160,000 482,121,000 — 992,000 481,129,000 Construction 14,091,000 14,032,000 — — 14,032,000 Home equity line of credit 93,180,000 90,289,000 — 387,000 89,902,000 Consumer 25,124,000 23,318,000 — — 23,318,000 Total loans 1,251,694,000 1,239,145,000 — 7,143,000 1,232,002,000 Mortgage servicing rights 1,451,000 2,083,000 — 2,083,000 — Financial liabilities Local certificates of deposit $ 283,119,000 $ 285,598,000 $ — $ 285,598,000 $ — National certificates of deposit 378,654,000 379,995,000 — 379,995,000 — Total certificates of deposits 661,773,000 665,593,000 — 665,593,000 — Repurchase agreements 41,310,000 40,004,000 — 40,004,000 — Federal Home Loan Bank advances 140,107,000 140,008,000 — 140,008,000 — Total borrowed funds 181,417,000 180,012,000 — 180,012,000 — The carrying amounts and estimated fair values for financial instruments as of December 31, 2018 were as follows: Carrying value Estimated fair value Level 1 Level 2 Level 3 Financial assets Securities to be held to maturity $ 255,663,000 $ 250,900,000 $ — $ 250,900,000 $ — Loans (net of allowance for loan losses) Commercial Real estate 349,243,000 340,526,000 — 423,000 340,103,000 Construction 27,018,000 26,344,000 — — 26,344,000 Other 192,420,000 189,842,000 — 6,096,000 183,746,000 Municipal 51,101,000 50,965,000 — — 50,965,000 Residential Term 467,760,000 451,323,000 — 793,000 450,530,000 Construction 17,705,000 17,083,000 — — 17,083,000 Home equity line of credit 97,650,000 95,175,000 — 103,000 95,072,000 Consumer 24,154,000 22,530,000 — — 22,530,000 Total loans 1,227,051,000 1,193,788,000 — 7,415,000 1,186,373,000 Mortgage servicing rights 1,354,000 2,586,000 — 2,586,000 — Financial liabilities Local certificates of deposit $ 284,482,000 $ 281,282,000 $ — $ 281,282,000 $ — National certificates of deposit 306,927,000 307,508,000 — 307,508,000 — Total deposits 591,409,000 588,790,000 — 588,790,000 — Repurchase agreements 40,205,000 40,161,000 — 40,161,000 — Federal Home Loan Bank advances 170,112,000 169,240,000 — 169,240,000 — Total borrowed funds 210,317,000 209,401,000 — 209,401,000 — The carrying amount and estimated fair values for financial instruments as of September 30, 2018 were as follows: Carrying value Estimated fair value Level 1 Level 2 Level 3 Financial assets Securities to be held to maturity $ 257,395,000 $ 249,890,000 $ — $ 249,890,000 $ — Loans (net of allowance for loan losses) Commercial Real estate 362,199,000 359,421,000 — 423,000 358,998,000 Construction 23,639,000 23,458,000 — — 23,458,000 Other 183,935,000 184,116,000 — 6,033,000 178,083,000 Municipal 56,677,000 56,981,000 — — 56,981,000 Residential Term 458,174,000 459,561,000 — 475,000 459,086,000 Construction 18,124,000 18,095,000 — — 18,095,000 Home equity line of credit 104,373,000 103,209,000 — 93,000 103,116,000 Consumer 24,755,000 24,126,000 — — 24,126,000 Total loans 1,231,876,000 1,228,967,000 — 7,024,000 1,221,943,000 Mortgage servicing rights 1,299,000 2,572,000 — 2,572,000 — Financial liabilities Local certificates of deposit 252,440,000 253,014,000 — 253,014,000 — National certificates of deposit 366,969,000 368,127,000 — 368,127,000 — Total certificates of deposits 619,409,000 621,141,000 — 621,141,000 — Repurchase agreements 95,160,000 90,311,000 — 90,311,000 — Federal Home Loan Bank advances 170,114,000 170,058,000 — 170,058,000 — Total borrowed funds 265,274,000 260,369,000 — 260,369,000 —

Impact of Recently Issued Accou

Impact of Recently Issued Accounting Standards	9 Months Ended
	Sep. 30, 2019
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Impact of Recently Issued Accounting Standards	Impact of Recently Issued Accounting Standards The FASB issued Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers, in 2014 to replace the current plethora of industry-specific rules with a broad, principles-based framework for recognizing and measuring revenue. Due to the complexity of the new pronouncement and the anticipated effort required by entities in many industries to implement ASU No. 2014-09, FASB delayed the effective date. Public business entities, certain not-for-profit entities, and certain employee benefit plans should apply the guidance to annual reporting periods beginning after December 15, 2017, and all other entities should apply the guidance to annual reporting periods beginning after December 15, 2018. FASB formed a Transition Resource Group to assist it in identifying implementation issues that may require further clarification or amendment to ASU No. 2014-09. As a result of that group’s deliberations, FASB has issued the following amendments, which will be effective concurrently with ASU No. 2014-09: ASU No. 2016-08, Principal versus Agent Considerations, which clarifies whether an entity should record the gross amount of revenue or only its ultimate share when a third party is also involved in providing goods or services to a customer; ASU No. 2016-10, Identifying Performance Obligations and Licensing, which clarifies and simplifies the process for determining whether performance obligations to a customer should be segregated and accounted for individually, and clarifies how the new revenue rules apply to licenses of intellectual property; and ASU No. 2016-12, Narrow-Scope Improvements and Practical Expedients, which clarifies and simplifies the process of assessing collectability of consideration under a contract, presentation of sales taxes, accounting for noncash consideration received, and certain transitional issues. The new standard does not apply to revenue associated with financial instruments, including loans and securities that are accounted for under other U.S. GAAP. The Company has reviewed its various other revenue streams and concluded that the new standard will have minimal impact upon its consolidated financial statements. Adoption of ASU No. 2014-09 was made on January 1, 2018 utilizing the modified retrospective approach. In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments - Overall: Recognition and Measurement of Financial Assets and Financial Liabilities. The ASU was issued to enhance the reporting model for financial instruments to provide users of financial statements with more decision-useful information. This ASU changes how entities account for equity investments that do not result in consolidation and are not accounted for under the equity method of accounting. The ASU also changes certain disclosure requirements and other aspects of U.S. GAAP, including a requirement for public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes. The ASU became effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The adoption of the ASU did not have a material effect on the Company's consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). The ASU was issued to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The ASU is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2018. The adoption of the ASU did not have a material effect on the Company's consolidated financial statements. In June 2016, the FASB issued 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 anticipates 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 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 will be effective for the Company on January 1, 2020 and will be applied prospectively. The Company does not expect the implementation to have a material effect on the Company's consolidated financial statements. In March 2017, the FASB issued ASU No. 2017-08, Premium Amortization on Purchased Callable Debt Securities. This ASU shortens the amortization period for the premium on certain purchased callable debt securities to the earliest call date. Today, many entities amortize the premium over the contractual life of the security. The new guidance does not change the accounting for purchased callable debt securities held at a discount; the discount continues to be accreted to maturity. The ASU is effective for interim and annual reporting periods beginning after December 15, 2018; early adoption is permitted. The guidance calls for a modified retrospective transition approach under which a cumulative-effect adjustment will be made to retained earnings as of the beginning of the first reporting period in which the guidance is adopted. The Company's current practice aligns with the ASU therefore there was no impact on the Company's consolidated financial statements. In May 2017, the FASB issued ASU No. 2017-09, Compensation-Stock Compensation (Topic 718): Scope of Modification Accounting. The ASU was issued to provide clarity and reduce both 1) diversity in practice and 2) cost and complexity when applying the guidance in Topic 718, Compensation-Stock Compensation, to a change to the terms or conditions of a shared-based payment award. The ASU includes guidance on determining which changes to the terms and conditions of share-based payment awards require and entity to apply modification accounting under Topic 718. The ASU is effective for the annual period, and interim periods within the annual periods, beginning after December 15, 2017. Early adoption is permitted, including adoption in any interim period. The ASU should be applied prospectively to an award modified on or after the adoption date. Adoption of the ASU did not have a material effect on the Company's consolidated financial statements. In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 815). The amendments in this ASU improve the financial reporting of hedging relationships to better portray the economic results of an entity's risk management activities in its financial statements. In addition, this ASU makes certain targeted improvements to simplify the application of the hedge accounting guidance in current US GAAP. The amendments in this ASU are effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early application is permitted in any interim period after issuance of the ASU. The adoption of this ASU did not have a material effect on the Company's consolidated financial statements. In February 2018, the FASB issued ASU No. 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income (Loss). This ASU was issued to allow a reclassification from accumulated other comprehensive income (loss) to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act. Consequently, the amendments eliminate the stranded tax effects resulting from the Tax Cuts and Jobs Act and will improve the usefulness of information reported to financial statement users. However, because the amendments only relate to the reclassification of the income tax effects of the Tax Cuts and Jobs Act, the underlying guidance that requires that the effect of a change in tax laws or rates be included in income from continuing operations is not affected. The ASU is effective for fiscal years beginning after December 15, 2018, with early adoption permitted for financial statements which have not yet been issued. The Company adopted the ASU for the December 31, 2017 consolidated financial statements, which resulted in a reclassification adjustment on the Consolidated Statements of Changes in Shareholders' Equity of $297,000 from accumulated other comprehensive income (loss) to retained earnings. Refer to Note 9, Income Taxes, in the Company's December 31, 2017 Form 10-K for additional information. In July 2018, the FASB issued ASU No. 2018-11, Leases - Targeted Improvements to provide entities with relief from the costs of implementing certain aspects of the new leasing standard, ASU No. 2016-02. Specifically, under the amendments in ASU 2018-11: (1) entities may elect not to recast the comparative periods presented when transitioning to the new leasing standard, and (2) lessors may elect not to separate lease and non-lease components when certain conditions are met. The amendments have the same effective date as ASU 2016-02. The Company expects to elect both transition options. The adoption of ASU 2018-11 did not have a material effect on the Company’s consolidated financial statements. In August 2018, the FASB issued ASU No. 2018-13, Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement. This ASU eliminates, adds and modifies certain disclosure requirements for fair value measurements. Among the changes, entities will no longer be required to disclose the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, but will be required to disclose the range and weighted average used to develop significant unobservable inputs for Level 3 fair value measurements. ASU No. 2018-13 is effective for interim and annual reporting periods beginning after December 15, 2019; early adoption is permitted. Entities are also allowed to elect early adoption the eliminated or modified disclosure requirements and delay adoption of the new disclosure requirements until their effective date. As ASU No. 2018-13 only revises disclosure requirements, it will not have a material impact 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 will not have a material impact on the Company’s consolidated financial statements.

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
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 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.
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.
Impact of Recently Issued Accounting Standards	Impact of Recently Issued Accounting Standards The FASB issued Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers, in 2014 to replace the current plethora of industry-specific rules with a broad, principles-based framework for recognizing and measuring revenue. Due to the complexity of the new pronouncement and the anticipated effort required by entities in many industries to implement ASU No. 2014-09, FASB delayed the effective date. Public business entities, certain not-for-profit entities, and certain employee benefit plans should apply the guidance to annual reporting periods beginning after December 15, 2017, and all other entities should apply the guidance to annual reporting periods beginning after December 15, 2018. FASB formed a Transition Resource Group to assist it in identifying implementation issues that may require further clarification or amendment to ASU No. 2014-09. As a result of that group’s deliberations, FASB has issued the following amendments, which will be effective concurrently with ASU No. 2014-09: ASU No. 2016-08, Principal versus Agent Considerations, which clarifies whether an entity should record the gross amount of revenue or only its ultimate share when a third party is also involved in providing goods or services to a customer; ASU No. 2016-10, Identifying Performance Obligations and Licensing, which clarifies and simplifies the process for determining whether performance obligations to a customer should be segregated and accounted for individually, and clarifies how the new revenue rules apply to licenses of intellectual property; and ASU No. 2016-12, Narrow-Scope Improvements and Practical Expedients, which clarifies and simplifies the process of assessing collectability of consideration under a contract, presentation of sales taxes, accounting for noncash consideration received, and certain transitional issues. The new standard does not apply to revenue associated with financial instruments, including loans and securities that are accounted for under other U.S. GAAP. The Company has reviewed its various other revenue streams and concluded that the new standard will have minimal impact upon its consolidated financial statements. Adoption of ASU No. 2014-09 was made on January 1, 2018 utilizing the modified retrospective approach. In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments - Overall: Recognition and Measurement of Financial Assets and Financial Liabilities. The ASU was issued to enhance the reporting model for financial instruments to provide users of financial statements with more decision-useful information. This ASU changes how entities account for equity investments that do not result in consolidation and are not accounted for under the equity method of accounting. The ASU also changes certain disclosure requirements and other aspects of U.S. GAAP, including a requirement for public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes. The ASU became effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The adoption of the ASU did not have a material effect on the Company's consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). The ASU was issued to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The ASU is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2018. The adoption of the ASU did not have a material effect on the Company's consolidated financial statements. In June 2016, the FASB issued 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 anticipates 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 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 will be effective for the Company on January 1, 2020 and will be applied prospectively. The Company does not expect the implementation to have a material effect on the Company's consolidated financial statements. In March 2017, the FASB issued ASU No. 2017-08, Premium Amortization on Purchased Callable Debt Securities. This ASU shortens the amortization period for the premium on certain purchased callable debt securities to the earliest call date. Today, many entities amortize the premium over the contractual life of the security. The new guidance does not change the accounting for purchased callable debt securities held at a discount; the discount continues to be accreted to maturity. The ASU is effective for interim and annual reporting periods beginning after December 15, 2018; early adoption is permitted. The guidance calls for a modified retrospective transition approach under which a cumulative-effect adjustment will be made to retained earnings as of the beginning of the first reporting period in which the guidance is adopted. The Company's current practice aligns with the ASU therefore there was no impact on the Company's consolidated financial statements. In May 2017, the FASB issued ASU No. 2017-09, Compensation-Stock Compensation (Topic 718): Scope of Modification Accounting. The ASU was issued to provide clarity and reduce both 1) diversity in practice and 2) cost and complexity when applying the guidance in Topic 718, Compensation-Stock Compensation, to a change to the terms or conditions of a shared-based payment award. The ASU includes guidance on determining which changes to the terms and conditions of share-based payment awards require and entity to apply modification accounting under Topic 718. The ASU is effective for the annual period, and interim periods within the annual periods, beginning after December 15, 2017. Early adoption is permitted, including adoption in any interim period. The ASU should be applied prospectively to an award modified on or after the adoption date. Adoption of the ASU did not have a material effect on the Company's consolidated financial statements. In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 815). The amendments in this ASU improve the financial reporting of hedging relationships to better portray the economic results of an entity's risk management activities in its financial statements. In addition, this ASU makes certain targeted improvements to simplify the application of the hedge accounting guidance in current US GAAP. The amendments in this ASU are effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early application is permitted in any interim period after issuance of the ASU. The adoption of this ASU did not have a material effect on the Company's consolidated financial statements. In February 2018, the FASB issued ASU No. 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income (Loss). This ASU was issued to allow a reclassification from accumulated other comprehensive income (loss) to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act. Consequently, the amendments eliminate the stranded tax effects resulting from the Tax Cuts and Jobs Act and will improve the usefulness of information reported to financial statement users. However, because the amendments only relate to the reclassification of the income tax effects of the Tax Cuts and Jobs Act, the underlying guidance that requires that the effect of a change in tax laws or rates be included in income from continuing operations is not affected. The ASU is effective for fiscal years beginning after December 15, 2018, with early adoption permitted for financial statements which have not yet been issued. The Company adopted the ASU for the December 31, 2017 consolidated financial statements, which resulted in a reclassification adjustment on the Consolidated Statements of Changes in Shareholders' Equity of $297,000 from accumulated other comprehensive income (loss) to retained earnings. Refer to Note 9, Income Taxes, in the Company's December 31, 2017 Form 10-K for additional information. In July 2018, the FASB issued ASU No. 2018-11, Leases - Targeted Improvements to provide entities with relief from the costs of implementing certain aspects of the new leasing standard, ASU No. 2016-02. Specifically, under the amendments in ASU 2018-11: (1) entities may elect not to recast the comparative periods presented when transitioning to the new leasing standard, and (2) lessors may elect not to separate lease and non-lease components when certain conditions are met. The amendments have the same effective date as ASU 2016-02. The Company expects to elect both transition options. The adoption of ASU 2018-11 did not have a material effect on the Company’s consolidated financial statements. In August 2018, the FASB issued ASU No. 2018-13, Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement. This ASU eliminates, adds and modifies certain disclosure requirements for fair value measurements. Among the changes, entities will no longer be required to disclose the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, but will be required to disclose the range and weighted average used to develop significant unobservable inputs for Level 3 fair value measurements. ASU No. 2018-13 is effective for interim and annual reporting periods beginning after December 15, 2019; early adoption is permitted. Entities are also allowed to elect early adoption the eliminated or modified disclosure requirements and delay adoption of the new disclosure requirements until their effective date. As ASU No. 2018-13 only revises disclosure requirements, it will not have a material impact 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 will not have a material impact on the Company’s consolidated financial statements.

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2019
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 September 30, 2019 : Amortized Cost Unrealized Gains Unrealized Losses Fair Value (Estimated) Securities available for sale Mortgage-backed securities $ 317,553,000 $ 5,327,000 $ (690,000 ) $ 322,190,000 State and political subdivisions 4,580,000 28,000 — 4,608,000 $ 322,133,000 $ 5,355,000 $ (690,000 ) $ 326,798,000 Securities to be held to maturity U.S. Government-sponsored agencies $ 32,840,000 $ 93,000 $ — $ 32,933,000 Mortgage-backed securities 15,584,000 502,000 (16,000 ) 16,070,000 State and political subdivisions 236,612,000 7,136,000 (48,000 ) 243,700,000 Corporate securities 13,750,000 194,000 — 13,944,000 $ 298,786,000 $ 7,925,000 $ (64,000 ) $ 306,647,000 Restricted equity securities Federal Home Loan Bank Stock $ 7,945,000 $ — $ — $ 7,945,000 Federal Reserve Bank Stock 1,037,000 — — 1,037,000 $ 8,982,000 $ — $ — $ 8,982,000 The following table summarizes the amortized cost and estimated fair value of investment securities at December 31, 2018 : Amortized Cost Unrealized Gains Unrealized Losses Fair Value (Estimated) Securities available for sale U.S. Government-sponsored agencies $ 5,000,000 $ 7,000 $ — $ 5,007,000 Mortgage-backed securities 313,854,000 571,000 (6,732,000 ) 307,693,000 State and political subdivisions 4,955,000 — (239,000 ) 4,716,000 $ 323,809,000 $ 578,000 $ (6,971,000 ) $ 317,416,000 Securities to be held to maturity U.S. Government-sponsored agencies $ 11,155,000 $ — $ (472,000 ) $ 10,683,000 Mortgage-backed securities 18,250,000 336,000 (255,000 ) 18,331,000 State and political subdivisions 221,958,000 1,046,000 (5,418,000 ) 217,586,000 Corporate securities 4,300,000 — — 4,300,000 $ 255,663,000 $ 1,382,000 $ (6,145,000 ) $ 250,900,000 Restricted equity securities Federal Home Loan Bank Stock $ 10,549,000 $ — $ — $ 10,549,000 Federal Reserve Bank Stock 1,037,000 — — 1,037,000 $ 11,586,000 $ — $ — $ 11,586,000 The following table summarizes the amortized cost and estimated fair value of investment securities at September 30, 2018 : Amortized Cost Unrealized Gains Unrealized Losses Fair Value (Estimated) Securities available for sale U.S. Government-sponsored agencies $ 5,000,000 $ — $ (21,000 ) $ 4,979,000 Mortgage-backed securities 303,793,000 77,000 (11,300,000 ) 292,570,000 State and political subdivisions 4,955,000 — (317,000 ) 4,638,000 $ 313,748,000 $ 77,000 $ (11,638,000 ) $ 302,187,000 Securities to be held to maturity U.S. Government-sponsored agencies $ 11,155,000 $ — $ (767,000 ) $ 10,388,000 Mortgage-backed securities 19,244,000 326,000 (460,000 ) 19,110,000 State and political subdivisions 222,696,000 639,000 (7,243,000 ) 216,092,000 Corporate securities 4,300,000 — — 4,300,000 $ 257,395,000 $ 965,000 $ (8,470,000 ) $ 249,890,000 Restricted equity securities Federal Home Loan Bank Stock $ 10,549,000 $ — $ — $ 10,549,000 Federal Reserve Bank Stock 1,037,000 — — 1,037,000 $ 11,586,000 $ — $ — $ 11,586,000
Contractual Maturities of Investment Securities	The following table summarizes the contractual maturities of investment securities at September 30, 2019 : Securities available for sale Securities to be held to maturity Amortized Cost Fair Value (Estimated) Amortized Cost Fair Value (Estimated) Due in 1 year or less $ 189,000 $ 189,000 $ 1,241,000 $ 1,245,000 Due in 1 to 5 years 36,304,000 36,703,000 23,460,000 23,920,000 Due in 5 to 10 years 91,242,000 93,419,000 184,234,000 188,811,000 Due after 10 years 194,398,000 196,487,000 89,851,000 92,671,000 $ 322,133,000 $ 326,798,000 $ 298,786,000 $ 306,647,000 The following table summarizes the contractual maturities of investment securities at December 31, 2018 : Securities available for sale Securities to be held to maturity Amortized Cost Fair Value (Estimated) Amortized Cost Fair Value (Estimated) Due in 1 year or less $ — $ — $ 1,432,000 $ 1,433,000 Due in 1 to 5 years 13,501,000 13,518,000 20,717,000 20,778,000 Due in 5 to 10 years 83,954,000 83,326,000 157,544,000 155,313,000 Due after 10 years 226,354,000 220,572,000 75,970,000 73,376,000 $ 323,809,000 $ 317,416,000 $ 255,663,000 $ 250,900,000 The following table summarizes the contractual maturities of investment securities at September 30, 2018 : Securities available for sale Securities to be held to maturity Amortized Cost Fair Value (Estimated) Amortized Cost Fair Value (Estimated) Due in 1 year or less $ — $ — $ 1,796,000 $ 1,800,000 Due in 1 to 5 years 13,961,000 13,886,000 21,463,000 21,468,000 Due in 5 to 10 years 69,317,000 67,434,000 155,997,000 152,154,000 Due after 10 years 230,470,000 220,867,000 78,139,000 74,468,000 $ 313,748,000 $ 302,187,000 $ 257,395,000 $ 249,890,000
Schedule of Securities Gains and Losses	The following table shows securities gains and losses for the nine months and quarters ended September 30, 2019 and 2018 : For the nine months ended September 30, For the quarter ended September 30, 2019 2018 2019 2018 Proceeds from sales of securities $ 4,725,000 $ 459,000 $ 4,725,000 $ — Gross realized gains 82,000 137,000 82,000 1,000 Gross realized losses (67,000 ) — (67,000 ) — Net gain $ 15,000 $ 137,000 $ 15,000 $ 1,000 Related income taxes $ 3,000 $ 29,000 $ 3,000 $ —
Schedule of Securities Temporarily Impaired	Information regarding securities temporarily impaired as of September 30, 2019 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 $ 30,249,000 $ (233,000 ) $ 22,569,000 $ (473,000 ) $ 52,818,000 $ (706,000 ) State and political subdivisions 5,073,000 (42,000 ) 306,000 (6,000 ) 5,379,000 (48,000 ) $ 35,322,000 $ (275,000 ) $ 22,875,000 $ (479,000 ) $ 58,197,000 $ (754,000 ) As of December 31, 2018 , there were 511 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 232 had been temporarily impaired for 12 months or more. Information regarding securities temporarily impaired as of December 31, 2018 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 $ — $ — $ 10,683,000 $ (472,000 ) $ 10,683,000 $ (472,000 ) Mortgage-backed securities 76,050,000 (1,061,000 ) 185,136,000 (5,926,000 ) 261,186,000 (6,987,000 ) State and political subdivisions 76,809,000 (1,784,000 ) 45,052,000 (3,873,000 ) 121,861,000 (5,657,000 ) $ 152,859,000 $ (2,845,000 ) $ 240,871,000 $ (10,271,000 ) $ 393,730,000 $ (13,116,000 ) As of September 30, 2018 , there were 596 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 185 had been temporarily impaired for 12 months or more. Information regarding securities temporarily impaired as of September 30, 2018 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 $ 7,753,000 $ (247,000 ) $ 7,614,000 $ (541,000 ) $ 15,367,000 $ (788,000 ) Mortgage-backed securities 154,611,000 (4,333,000 ) 143,771,000 (7,427,000 ) 298,382,000 (11,760,000 ) State and political subdivisions 105,233,000 (3,255,000 ) 38,491,000 (4,305,000 ) 143,724,000 (7,560,000 ) $ 267,597,000 $ (7,835,000 ) $ 189,876,000 $ (12,273,000 ) $ 457,473,000 $ (20,108,000 )

Loans (Tables)

Loans (Tables)	9 Months Ended
	Sep. 30, 2019
Loans and Leases Receivable Disclosure [Abstract]
Composition of Loan Portfolio	The following table shows the composition of the Company's loan portfolio as of September 30, 2019 and 2018 and at December 31, 2018 : September 30, 2019 December 31, 2018 September 30, 2018 Commercial Real estate $ 368,165,000 29.1 % $ 353,243,000 28.5 % $ 366,390,000 29.5 % Construction 37,242,000 2.9 % 27,304,000 2.2 % 23,889,000 1.9 % Other 201,859,000 16.0 % 196,391,000 15.9 % 188,128,000 15.1 % Municipal 36,522,000 2.9 % 51,128,000 4.1 % 56,704,000 4.6 % Residential Term 485,490,000 38.4 % 469,145,000 37.9 % 459,449,000 36.8 % Construction 14,118,000 1.1 % 17,743,000 1.4 % 18,166,000 1.5 % Home equity line of credit 94,144,000 7.5 % 98,469,000 8.0 % 105,213,000 8.5 % Consumer 25,919,000 2.1 % 24,860,000 2.0 % 25,619,000 2.1 % Total $ 1,263,459,000 100.0 % $ 1,238,283,000 100.0 % $ 1,243,558,000 100.0 %
Past Due Loans Aging	Information on the past-due status of loans by class of financing receivable as of September 30, 2019 , is presented in the following table: 30-59 Days Past Due 60-89 Days Past Due 90+ Days Past Due All Past Due Current Total 90+ Days & Accruing Commercial Real estate $ 305,000 $ 233,000 $ 661,000 $ 1,199,000 $ 366,966,000 $ 368,165,000 $ — Construction 14,000 279,000 — 293,000 36,949,000 37,242,000 — Other 35,000 289,000 339,000 663,000 201,196,000 201,859,000 — Municipal — — — — 36,522,000 36,522,000 — Residential Term 650,000 767,000 3,806,000 5,223,000 480,267,000 485,490,000 — Construction — — — — 14,118,000 14,118,000 — Home equity line of credit 693,000 306,000 868,000 1,867,000 92,277,000 94,144,000 — Consumer 234,000 317,000 18,000 569,000 25,350,000 25,919,000 18,000 Total $ 1,931,000 $ 2,191,000 $ 5,692,000 $ 9,814,000 $ 1,253,645,000 $ 1,263,459,000 $ 18,000 Information on the past-due status of loans by class of financing receivable as of December 31, 2018 , is presented in the following table: 30-59 Days Past Due 60-89 Days Past Due 90+ Days Past Due All Past Due Current Total 90+ Days & Accruing Commercial Real estate $ 1,274,000 $ — $ 777,000 $ 2,051,000 $ 351,192,000 $ 353,243,000 $ — Construction — 10,000 — 10,000 27,294,000 27,304,000 — Other 455,000 5,000 120,000 580,000 195,811,000 196,391,000 — Municipal — — — — 51,128,000 51,128,000 — Residential Term 1,097,000 3,518,000 2,023,000 6,638,000 462,507,000 469,145,000 339,000 Construction 76,000 — — 76,000 17,667,000 17,743,000 — Home equity line of credit 2,819,000 419,000 493,000 3,731,000 94,738,000 98,469,000 — Consumer 237,000 25,000 27,000 289,000 24,571,000 24,860,000 12,000 Total $ 5,958,000 $ 3,977,000 $ 3,440,000 $ 13,375,000 $ 1,224,908,000 $ 1,238,283,000 $ 351,000 Information on the past-due status of loans by class of financing receivable as of September 30, 2018 , is presented in the following table: 30-59 Days Past Due 60-89 Days Past Due 90+ Days Past Due All Past Due Current Total 90+ Days & Accruing Commercial Real estate $ 305,000 $ — $ 503,000 $ 808,000 $ 365,582,000 $ 366,390,000 $ — Construction — — — — 23,889,000 23,889,000 — Other 440,000 526,000 416,000 1,382,000 186,746,000 188,128,000 — Municipal — — — — 56,704,000 56,704,000 — Residential Term 838,000 2,701,000 1,566,000 5,105,000 454,344,000 459,449,000 199,000 Construction — — — — 18,166,000 18,166,000 — Home equity line of credit 1,883,000 403,000 565,000 2,851,000 102,362,000 105,213,000 — Consumer 161,000 14,000 52,000 227,000 25,392,000 25,619,000 50,000 Total $ 3,627,000 $ 3,644,000 $ 3,102,000 $ 10,373,000 $ 1,233,185,000 $ 1,243,558,000 $ 249,000
Nonaccrual Loans	Information on nonaccrual loans as of September 30, 2019 and 2018 and at December 31, 2018 is presented in the following table: September 30, 2019 December 31, 2018 September 30, 2018 Commercial Real estate $ 1,807,000 $ 1,226,000 $ 964,000 Construction 256,000 — — Other 6,871,000 8,664,000 9,330,000 Municipal — — — Residential Term 6,840,000 4,062,000 3,042,000 Construction — — — Home equity line of credit 1,078,000 760,000 834,000 Consumer 6,000 15,000 2,000 Total $ 16,858,000 $ 14,727,000 $ 14,172,000
Impaired Loans by Class of Financing Receivable	A breakdown of impaired loans by class of financing receivable as of and for the period ended September 30, 2019 is presented in the following table: For the nine months ended September 30, 2019 For the quarter ended September 30, 2019 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Recognized Interest Income Average Recorded Investment Recognized Interest Income With No Related Allowance Commercial Real estate $ 7,332,000 $ 7,630,000 $ — $ 7,929,000 $ 266,000 $ 7,242,000 $ 83,000 Construction 978,000 990,000 — 929,000 35,000 980,000 12,000 Other 892,000 930,000 — 997,000 22,000 921,000 8,000 Municipal — — — — — — — Residential Term 10,664,000 12,305,000 — 9,877,000 202,000 10,487,000 63,000 Construction — — — — — — — Home equity line of credit 827,000 883,000 — 965,000 16,000 917,000 6,000 Consumer — — — — — — — $ 20,693,000 $ 22,738,000 $ — $ 20,697,000 $ 541,000 $ 20,547,000 $ 172,000 With an Allowance Recorded Commercial Real estate $ 1,717,000 $ 1,732,000 $ 258,000 $ 1,538,000 $ 72,000 $ 1,721,000 $ 23,000 Construction — — — — — — — Other 6,440,000 6,949,000 1,275,000 6,918,000 1,000 6,465,000 1,000 Municipal — — — — — — — Residential Term 2,782,000 3,121,000 337,000 2,306,000 61,000 2,858,000 25,000 Construction — — — — — — — Home equity line of credit 571,000 590,000 184,000 99,000 — 248,000 — Consumer 6,000 6,000 6,000 1,000 — 2,000 — $ 11,516,000 $ 12,398,000 $ 2,060,000 $ 10,862,000 $ 134,000 $ 11,294,000 $ 49,000 Total Commercial Real estate $ 9,049,000 $ 9,362,000 $ 258,000 $ 9,467,000 $ 338,000 $ 8,963,000 $ 106,000 Construction 978,000 990,000 — 929,000 35,000 980,000 12,000 Other 7,332,000 7,879,000 1,275,000 7,915,000 23,000 7,386,000 9,000 Municipal — — — — — — — Residential Term 13,446,000 15,426,000 337,000 12,183,000 263,000 13,345,000 88,000 Construction — — — — — — — Home equity line of credit 1,398,000 1,473,000 184,000 1,064,000 16,000 1,165,000 6,000 Consumer 6,000 6,000 6,000 1,000 — 2,000 — $ 32,209,000 $ 35,136,000 $ 2,060,000 $ 31,559,000 $ 675,000 $ 31,841,000 $ 221,000 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, 2018 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 $ 8,718,000 $ 9,161,000 $ — $ 5,536,000 $ 380,000 Construction 721,000 721,000 — 762,000 43,000 Other 1,468,000 1,555,000 — 2,037,000 32,000 Municipal — — — — — Residential Term 9,136,000 10,317,000 — 9,427,000 289,000 Construction — — — — — Home equity line of credit 972,000 1,035,000 — 1,001,000 20,000 Consumer 15,000 42,000 — 13,000 — $ 21,030,000 $ 22,831,000 $ — $ 18,776,000 $ 764,000 With an Allowance Recorded Commercial Real estate $ 1,042,000 $ 1,059,000 $ 260,000 $ 3,477,000 $ 42,000 Construction — — — — — Other 7,791,000 8,216,000 1,696,000 7,471,000 5,000 Municipal — — — — — Residential Term 1,768,000 1,998,000 335,000 1,982,000 53,000 Construction — — — — — Home equity line of credit 120,000 124,000 17,000 99,000 — Consumer — — — — — $ 10,721,000 $ 11,397,000 $ 2,308,000 $ 13,029,000 $ 100,000 Total Commercial Real estate $ 9,760,000 $ 10,220,000 $ 260,000 $ 9,013,000 $ 422,000 Construction 721,000 721,000 — 762,000 43,000 Other 9,259,000 9,771,000 1,696,000 9,508,000 37,000 Municipal — — — — — Residential Term 10,904,000 12,315,000 335,000 11,409,000 342,000 Construction — — — — — Home equity line of credit 1,092,000 1,159,000 17,000 1,100,000 20,000 Consumer 15,000 42,000 — 13,000 — $ 31,751,000 $ 34,228,000 $ 2,308,000 $ 31,805,000 $ 864,000 A breakdown of impaired loans by class of financing receivable as of and for the period ended September 30, 2018 is presented in the following table: For the nine months ended September 30, 2018 For the quarter ended September 30, 2018 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Recognized Interest Income Average Recorded Investment Recognized Interest Income With No Related Allowance Commercial Real estate $ 5,954,000 $ 6,275,000 $ — $ 5,099,000 $ 194,000 $ 5,966,000 $ 84,000 Construction 741,000 741,000 — 773,000 32,000 741,000 11,000 Other 1,926,000 2,044,000 — 2,146,000 25,000 1,865,000 8,000 Municipal — — — — — — — Residential Term 9,019,000 10,201,000 — 9,515,000 222,000 9,200,000 71,000 Construction — — — — — — — Home equity line of credit 1,068,000 1,128,000 — 1,014,000 15,000 1,033,000 6,000 Consumer — — — 14,000 — 10,000 — $ 18,708,000 $ 20,389,000 $ — $ 18,561,000 $ 488,000 $ 18,815,000 $ 180,000 With an Allowance Recorded Commercial Real estate $ 3,456,000 $ 3,474,000 $ 265,000 $ 3,700,000 $ 97,000 $ 3,461,000 $ 30,000 Construction — — — — — — — Other 7,923,000 8,231,000 1,890,000 7,345,000 — 7,682,000 — Municipal — — — — — — — Residential Term 1,909,000 2,085,000 238,000 2,054,000 70,000 2,108,000 22,000 Construction — — — — — — — Home equity line of credit 100,000 100,000 7,000 92,000 — 100,000 — Consumer 2,000 15,000 2,000 — — 1,000 — $ 13,390,000 $ 13,905,000 $ 2,402,000 $ 13,191,000 $ 167,000 $ 13,352,000 $ 52,000 Total Commercial Real estate $ 9,410,000 $ 9,749,000 $ 265,000 $ 8,799,000 $ 291,000 $ 9,427,000 $ 114,000 Construction 741,000 741,000 — 773,000 32,000 741,000 11,000 Other 9,849,000 10,275,000 1,890,000 9,491,000 25,000 9,547,000 8,000 Municipal — — — — — — — Residential Term 10,928,000 12,286,000 238,000 11,569,000 292,000 11,308,000 93,000 Construction — — — — — — — Home equity line of credit 1,168,000 1,228,000 7,000 1,106,000 15,000 1,133,000 6,000 Consumer 2,000 15,000 2,000 14,000 — 11,000 — $ 32,098,000 $ 34,294,000 $ 2,402,000 $ 31,752,000 $ 655,000 $ 32,167,000 $ 232,000
Troubled Debt Restructurings on Financing Receivables	The following table shows TDRs by class and the specific reserve as of September 30, 2019 : Number of Loans Balance Specific Reserves Commercial Real estate 19 $ 7,559,000 $ 249,000 Construction 1 721,000 — Other 7 6,951,000 1,232,000 Municipal — — — Residential Term 52 8,563,000 202,000 Construction — — — Home equity line of credit 3 487,000 — Consumer — — — 82 $ 24,281,000 $ 1,683,000 The following table shows TDRs by class and the specific reserve as of December 31, 2018 : Number of Loans Balance Specific Reserves Commercial Real estate 17 $ 8,631,000 $ 132,000 Construction 1 721,000 — Other 10 7,298,000 1,276,000 Municipal — — — Residential Term 45 8,074,000 160,000 Construction — — — Home equity line of credit 3 498,000 — Consumer — — — 76 $ 25,222,000 $ 1,568,000 The following table shows TDRs by class and the specific reserve as of September 30, 2018 : Number of Loans Balance Specific Reserves Commercial Real estate 16 $ 8,542,000 $ 138,000 Construction 1 741,000 — Other 5 7,007,000 1,100,000 Municipal — — — Residential Term 46 8,869,000 238,000 Construction — — — Home equity line of credit 3 502,000 — Consumer — — — 71 $ 25,661,000 $ 1,476,000 As of September 30, 2019 , nine of the loans classified as TDRs with a total balance of $1,084,000 were more than 30 days past due. Of these loans, four 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 September 30, 2019 : Number of Loans Balance Specific Reserves Commercial Real estate — $ — $ — Construction — — — Other 3 251,000 131,000 Municipal — — — Residential Term 5 666,000 11,000 Construction — — — Home equity line of credit 1 167,000 — Consumer — — — 9 $ 1,084,000 $ 142,000 As of September 30, 2018 , 10 of the loans classified as TDRs with a total balance of $1,271,000 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 September 30, 2018 : Number of Loans Balance Specific Reserves Commercial Real estate — $ — $ — Construction — — — Other 1 138,000 — Municipal — — — Residential Term 8 966,000 5,000 Construction — — — Home equity line of credit 1 167,000 — Consumer — — — 10 $ 1,271,000 $ 5,000 For the nine months ended September 30, 2019 , 10 loans were placed on TDR status. The following table shows these TDRs by class and the associated specific reserves included in the allowance for loan losses as of September 30, 2019 : Number of Loans Pre-Modification Post-Modification Outstanding Specific Reserves Commercial Real estate 2 $ 110,000 $ 95,000 $ 95,000 Construction — — — — Other — — — — Municipal — — — — Residential Term 8 998,000 882,000 73,000 Construction — — — — Home equity line of credit — — — — Consumer — — — — 10 $ 1,108,000 $ 977,000 $ 168,000 For the nine months ended September 30, 2018 , 11 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 September 30, 2018 : Number of Loans Pre-Modification Post-Modification Outstanding Specific Reserves Commercial Real estate 8 $ 1,608,000 $ 1,606,000 $ 42,000 Construction — — — — Other 1 6,727,000 6,487,000 1,100,000 Municipal — — — — Residential Term 2 441,000 436,000 26,000 Construction — — — — Home equity line of credit — — — — Consumer — — — — 11 $ 8,776,000 $ 8,529,000 $ 1,168,000 For the quarter ended September 30, 2019 , two loans were placed on TDR status. The following table shows these TDRs by class and the associated specific reserves included in the allowance for loan losses as of September 30, 2019 : Number of Loans Pre-Modification Post-Modification Outstanding Specific Reserves Commercial Real estate — $ — $ — $ — Construction — — — — Other — — — — Municipal — — — — Residential Term 2 317,000 276,000 — Construction — — — — Home equity line of credit — — — — Consumer — — — — 2 $ 317,000 $ 276,000 $ — For the quarter ended September 30, 2018 , one loan was placed on TDR status. The following table shows these TDRs by class and the associated specific reserves included in the allowance for loan losses as of September 30, 2018 : Number of Loans Pre-Modification Post-Modification Outstanding Specific Reserves Commercial Real estate 1 $ 552,000 $ 552,000 $ — Construction — — — — Other — — — — Municipal — — — — Residential Term — — — — Construction — — — — Home equity line of credit — — — — Consumer — — — — 1 $ 552,000 $ 552,000 $ —

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2019
Receivables [Abstract]
Allowance for Loan Losses by Class of Financing Receivable and Allowance	A breakdown of the allowance for loan losses as of September 30, 2019 , December 31, 2018 , and September 30, 2018 , by class of financing receivable and allowance element, is presented in the following tables: As of September 30, 2019 Specific Reserves on Loans Evaluated Individually for Impairment General Reserves on Loans Based on Historical Loss Experience Reserves for Qualitative Factors Unallocated Reserves Total Reserves Commercial Real estate $ 258,000 $ 792,000 $ 2,745,000 $ — $ 3,795,000 Construction — 79,000 274,000 — 353,000 Other 1,275,000 436,000 1,509,000 — 3,220,000 Municipal — — 26,000 — 26,000 Residential Term 337,000 185,000 615,000 — 1,137,000 Construction — 5,000 18,000 — 23,000 Home equity line of credit 184,000 155,000 485,000 — 824,000 Consumer 6,000 285,000 389,000 — 680,000 Unallocated — — — 1,707,000 1,707,000 $ 2,060,000 $ 1,937,000 $ 6,061,000 $ 1,707,000 $ 11,765,000 As of December 31, 2018 Specific Reserves on Loans Evaluated Individually for Impairment General Reserves on Loans Based on Historical Loss Experience Reserves for Qualitative Factors Unallocated Reserves Total Reserves Commercial Real estate $ 260,000 $ 742,000 $ 2,565,000 $ — $ 3,567,000 Construction — 57,000 198,000 — 255,000 Other 1,696,000 414,000 1,431,000 — 3,541,000 Municipal — — 24,000 — 24,000 Residential Term 335,000 326,000 574,000 — 1,235,000 Construction — 12,000 22,000 — 34,000 Home equity line of credit 17,000 263,000 450,000 — 730,000 Consumer — 271,000 359,000 — 630,000 Unallocated — — — 1,216,000 1,216,000 $ 2,308,000 $ 2,085,000 $ 5,623,000 $ 1,216,000 $ 11,232,000 As of September 30, 2018 Specific Reserves on Loans Evaluated Individually for Impairment General Reserves on Loans Based on Historical Loss Experience Reserves for Qualitative Factors Unallocated Reserves Total Reserves Commercial Real estate $ 265,000 $ 758,000 $ 2,566,000 $ — $ 3,589,000 Construction — 49,000 165,000 — 214,000 Other 1,890,000 388,000 1,313,000 — 3,591,000 Municipal — — 23,000 — 23,000 Residential Term 238,000 313,000 541,000 — 1,092,000 Construction — 13,000 23,000 — 36,000 Home equity line of credit 7,000 280,000 432,000 — 719,000 Consumer 2,000 397,000 341,000 — 740,000 Unallocated — — — 1,678,000 1,678,000 $ 2,402,000 $ 2,198,000 $ 5,404,000 $ 1,678,000 $ 11,682,000
Summary 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 September 30, 2019 : Commercial Real Estate Commercial Construction Commercial Other Municipal Loans All Risk- Rated Loans 1 Strong $ — $ — $ 3,835,000 $ 35,000 $ 3,870,000 2 Above Average 12,595,000 34,000 5,836,000 33,768,000 52,233,000 3 Satisfactory 84,567,000 2,154,000 45,742,000 386,000 132,849,000 4 Average 186,605,000 20,931,000 85,485,000 2,333,000 295,354,000 5 Watch 67,674,000 13,867,000 48,498,000 — 130,039,000 6 OAEM 504,000 — 2,070,000 — 2,574,000 7 Substandard 16,220,000 256,000 10,393,000 — 26,869,000 8 Doubtful — — — — — Total $ 368,165,000 $ 37,242,000 $ 201,859,000 $ 36,522,000 $ 643,788,000 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, 2018 : Commercial Real Estate Commercial Construction Commercial Other Municipal Loans All Risk- Rated Loans 1 Strong $ — $ — $ 3,444,000 $ — $ 3,444,000 2 Above Average 10,484,000 37,000 4,564,000 48,800,000 63,885,000 3 Satisfactory 80,266,000 2,231,000 46,090,000 518,000 129,105,000 4 Average 172,597,000 18,780,000 82,081,000 1,810,000 275,268,000 5 Watch 66,325,000 5,970,000 45,546,000 — 117,841,000 6 OAEM 6,890,000 — 1,805,000 — 8,695,000 7 Substandard 16,558,000 286,000 12,861,000 — 29,705,000 8 Doubtful 123,000 — — — 123,000 Total $ 353,243,000 $ 27,304,000 $ 196,391,000 $ 51,128,000 $ 628,066,000 The following table summarizes the risk ratings for the Company's commercial real estate, commercial construction, commercial other, and municipal loans as of September 30, 2018 : Commercial Real Estate Commercial Construction Commercial Other Municipal Loans All Risk- Rated Loans 1 Strong $ — $ — $ 2,558,000 $ — $ 2,558,000 2 Above Average 10,710,000 38,000 4,845,000 55,553,000 71,146,000 3 Satisfactory 78,794,000 1,810,000 44,888,000 552,000 126,044,000 4 Average 196,883,000 16,331,000 80,171,000 599,000 293,984,000 5 Watch 62,036,000 5,424,000 39,176,000 — 106,636,000 6 OAEM 1,387,000 — 1,368,000 — 2,755,000 7 Substandard 16,457,000 286,000 15,122,000 — 31,865,000 8 Doubtful 123,000 — — — 123,000 Total $ 366,390,000 $ 23,889,000 $ 188,128,000 $ 56,704,000 $ 635,111,000
Allowance for Loan Losses Transactions	The following table presents allowance for loan losses activity by class for the nine months and quarter ended September 30, 2019 , and allowance for loan loss balances by class and related loan balances by class as of September 30, 2019 : Commercial Municipal Residential Home Equity Line of Credit Consumer Unallocated Total Real Estate Construction Other Term Construction For the nine months ended September 30, 2019 Beginning balance $ 3,567,000 $ 255,000 $ 3,541,000 $ 24,000 $ 1,235,000 $ 34,000 $ 730,000 $ 630,000 $ 1,216,000 $ 11,232,000 Charge offs 53,000 — 123,000 — 93,000 — 38,000 235,000 — 542,000 Recoveries 15,000 — 70,000 — 10,000 — 3,000 102,000 — 200,000 Provision (credit) 266,000 98,000 (268,000 ) 2,000 (15,000 ) (11,000 ) 129,000 183,000 491,000 875,000 Ending balance $ 3,795,000 $ 353,000 $ 3,220,000 $ 26,000 $ 1,137,000 $ 23,000 $ 824,000 $ 680,000 $ 1,707,000 $ 11,765,000 For the three months ended September 30, 2019 Beginning balance $ 3,609,000 $ 309,000 $ 3,281,000 $ 25,000 $ 1,106,000 $ 23,000 $ 633,000 $ 649,000 $ 1,836,000 $ 11,471,000 Charge offs — — 14,000 — — — — 48,000 — 62,000 Recoveries 2,000 — 68,000 — 4,000 — 1,000 31,000 — 106,000 Provision (credit) 184,000 44,000 (115,000 ) 1,000 27,000 — 190,000 48,000 (129,000 ) 250,000 Ending balance $ 3,795,000 $ 353,000 $ 3,220,000 $ 26,000 $ 1,137,000 $ 23,000 $ 824,000 $ 680,000 $ 1,707,000 $ 11,765,000 Allowance for loan losses as of September 30, 2019 Ending balance specifically evaluated for impairment $ 258,000 $ — $ 1,275,000 $ — $ 337,000 $ — $ 184,000 $ 6,000 $ — $ 2,060,000 Ending balance collectively evaluated for impairment $ 3,537,000 $ 353,000 $ 1,945,000 $ 26,000 $ 800,000 $ 23,000 $ 640,000 $ 674,000 $ 1,707,000 $ 9,705,000 Related loan balances as of September 30, 2019 Ending balance $ 368,165,000 $ 37,242,000 $ 201,859,000 $ 36,522,000 $ 485,490,000 $ 14,118,000 $ 94,144,000 $ 25,919,000 $ — $ 1,263,459,000 Ending balance specifically evaluated for impairment $ 9,049,000 $ 978,000 $ 7,332,000 $ — $ 13,446,000 $ — $ 1,398,000 $ 6,000 $ — $ 32,209,000 Ending balance collectively evaluated for impairment $ 359,116,000 $ 36,264,000 $ 194,527,000 $ 36,522,000 $ 472,044,000 $ 14,118,000 $ 92,746,000 $ 25,913,000 $ — $ 1,231,250,000 The following table presents allowance for loan losses activity by class for the year ended December 31, 2018 and allowance for loan loss balances by class and related loan balances by class as of December 31, 2018 : Commercial Municipal Residential Home Equity Line of Credit Consumer Unallocated Total Real Estate Construction Other Term Construction For the year ended December 31, 2018 Beginning balance $ 3,872,000 $ 434,000 $ 3,358,000 $ 20,000 $ 1,130,000 $ 36,000 $ 692,000 $ 545,000 $ 642,000 $ 10,729,000 Charge offs 168,000 — 423,000 — 213,000 — 121,000 348,000 — 1,273,000 Recoveries 52,000 — 40,000 — 64,000 — 24,000 96,000 — 276,000 Provision (credit) (189,000 ) (179,000 ) 566,000 4,000 254,000 (2,000 ) 135,000 337,000 574,000 1,500,000 Ending balance $ 3,567,000 $ 255,000 $ 3,541,000 $ 24,000 $ 1,235,000 $ 34,000 $ 730,000 $ 630,000 $ 1,216,000 $ 11,232,000 Allowance for loan losses as of December 31, 2018 Ending balance specifically evaluated for impairment $ 260,000 $ — $ 1,696,000 $ — $ 335,000 $ — $ 17,000 $ — $ — $ 2,308,000 Ending balance collectively evaluated for impairment $ 3,307,000 $ 255,000 $ 1,845,000 $ 24,000 $ 900,000 $ 34,000 $ 713,000 $ 630,000 $ 1,216,000 $ 8,924,000 Related loan balances as of December 31, 2018 Ending balance $ 353,243,000 $ 27,304,000 $ 196,391,000 $ 51,128,000 $ 469,145,000 $ 17,743,000 $ 98,469,000 $ 24,860,000 $ — $ 1,238,283,000 Ending balance specifically evaluated for impairment $ 9,760,000 $ 721,000 $ 9,259,000 $ — $ 10,904,000 $ — $ 1,092,000 $ 15,000 $ — $ 31,751,000 Ending balance collectively evaluated for impairment $ 343,483,000 $ 26,583,000 $ 187,132,000 $ 51,128,000 $ 458,241,000 $ 17,743,000 $ 97,377,000 $ 24,845,000 $ — $ 1,206,532,000 The following table presents allowance for loan losses activity by class for the nine months and quarter ended September 30, 2018 , and allowance for loan loss balances by class and related loan balances by class as of September 30, 2018 : Commercial Municipal Residential Home Equity Line of Credit Consumer Unallocated Total Real Estate Construction Other Term Construction For the nine months ended September 30, 2018 Beginning balance $ 3,872,000 $ 434,000 $ 3,358,000 $ 20,000 $ 1,130,000 $ 36,000 $ 692,000 $ 545,000 $ 642,000 $ 10,729,000 Charge offs — — 68,000 — 212,000 — 121,000 195,000 — 596,000 Recoveries 52,000 — 33,000 — 45,000 — 13,000 73,000 — 216,000 Provision (credit) (335,000 ) (220,000 ) 268,000 3,000 129,000 — 135,000 317,000 1,036,000 1,333,000 Ending balance $ 3,589,000 $ 214,000 $ 3,591,000 $ 23,000 $ 1,092,000 $ 36,000 $ 719,000 $ 740,000 $ 1,678,000 $ 11,682,000 For the three months ended September 30, 2018 Beginning balance $ 3,732,000 $ 399,000 $ 3,475,000 $ 21,000 $ 1,138,000 $ 29,000 $ 678,000 $ 575,000 $ 1,425,000 $ 11,472,000 Charge offs — — 51,000 — 116,000 — 6,000 50,000 — 223,000 Recoveries 52,000 — 23,000 — 3,000 — — 22,000 — 100,000 Provision (credit) (195,000 ) (185,000 ) 144,000 2,000 67,000 7,000 47,000 193,000 253,000 333,000 Ending balance $ 3,589,000 $ 214,000 $ 3,591,000 $ 23,000 $ 1,092,000 $ 36,000 $ 719,000 $ 740,000 $ 1,678,000 $ 11,682,000 Allowance for loan losses as of September 30, 2018 Ending balance specifically evaluated for impairment $ 265,000 $ — $ 1,890,000 $ — $ 238,000 $ — $ 7,000 $ 2,000 $ — $ 2,402,000 Ending balance collectively evaluated for impairment $ 3,324,000 $ 214,000 $ 1,701,000 $ 23,000 $ 854,000 $ 36,000 $ 712,000 $ 738,000 $ 1,678,000 $ 9,280,000 Related loan balances as of September 30, 2018 Ending balance $ 366,390,000 $ 23,889,000 $ 188,128,000 $ 56,704,000 $ 459,449,000 $ 18,166,000 $ 105,213,000 $ 25,619,000 $ — $ 1,243,558,000 Ending balance specifically evaluated for impairment $ 9,410,000 $ 741,000 $ 9,849,000 $ — $ 10,928,000 $ — $ 1,168,000 $ 2,000 $ — $ 32,098,000 Ending balance collectively evaluated for impairment $ 356,980,000 $ 23,148,000 $ 178,279,000 $ 56,704,000 $ 448,521,000 $ 18,166,000 $ 104,045,000 $ 25,617,000 $ — $ 1,211,460,000

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2019
Share-based Payment Arrangement [Abstract]
Schedule of Nonvested Restricted Stock Units Activity	As of September 30, 2019 , 162,892 shares of restricted stock had been granted under the 2010 Plan, of which 75,254 shares remain restricted as of September 30, 2019 as detailed in the following table: Year Granted Vesting Term (In Years) Shares Remaining Term (In Years) 2015 5.0 12,023 0.3 2016 5.0 15,015 1.3 2017 3.0 4,602 0.4 2017 5.0 9,972 2.3 2018 2.0 932 0.3 2018 3.0 1,900 1.4 2018 4.0 2,068 2.3 2018 5.0 9,655 3.3 2019 1.0 1,349 0.3 2019 2.0 1,484 1.3 2019 3.0 16,254 2.3 75,254 1.6

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Basic and Diluted Earnings per Share (EPS)	The following table sets forth the computation of basic and diluted earnings per share (EPS) for the nine months ended September 30, 2019 and 2018 : Income (Numerator) Shares (Denominator) Per-Share Amount For the nine months ended September 30, 2019 Net income as reported $ 18,839,000 Basic EPS: Income available to common shareholders 18,839,000 10,811,233 $ 1.74 Effect of dilutive securities: restricted stock 75,013 Diluted EPS: Income available to common shareholders plus assumed conversions $ 18,839,000 10,886,246 $ 1.73 For the nine months ended September 30, 2018 Net income as reported $ 17,173,000 Basic EPS: Income available to common shareholders 17,173,000 10,780,277 $ 1.59 Effect of dilutive securities: restricted stock 69,515 Diluted EPS: Income available to common shareholders plus assumed conversions $ 17,173,000 10,849,792 $ 1.58 The following table sets forth the computation of basic diluted EPS for the quarters ended September 30, 2019 and 2018 . Income (Numerator) Shares (Denominator) Per-Share Amount For the quarter ended September 30, 2019 Net income as reported $ 6,288,000 Basic EPS: Income available to common shareholders 6,288,000 10,818,423 $ 0.58 Effect of dilutive securities: restricted stock 75,493 Diluted EPS: Income available to common shareholders plus assumed conversions $ 6,288,000 10,893,916 $ 0.58 For the quarter ended September 30, 2018 Net income as reported $ 5,933,000 Basic EPS: Income available to common shareholders 5,933,000 10,785,528 $ 0.55 Effect of dilutive securities: restricted stock 69,515 Diluted EPS: Income available to common shareholders plus assumed conversions $ 5,933,000 10,855,043 $ 0.55

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2019
Retirement Benefits, Description [Abstract]
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 nine months ended September 30, 2019 2018 Change in benefit obligation Benefit obligation at beginning of year $ 1,599,000 $ 1,874,000 Interest cost 50,000 57,000 Benefits paid (85,000 ) (84,000 ) Benefit obligation at end of period $ 1,564,000 $ 1,847,000 Funded status Benefit obligation at end of period $ (1,564,000 ) $ (1,847,000 ) Unamortized (gain) loss (47,000 ) 186,000 Accrued benefit cost at end of period $ (1,611,000 ) $ (1,661,000 )
Schedule of net pension costs	The following table sets forth the net periodic pension cost: For the nine months ended September 30, For the quarter ended September 30, 2019 2018 2019 2018 Components of net periodic benefit cost Interest cost $ 50,000 $ 57,000 $ 17,000 $ 19,000 Net periodic benefit cost $ 50,000 $ 57,000 $ 17,000 $ 19,000
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 (loss) are as follows: September 30, December 31, 2018 September 30, Unamortized net actuarial gain (loss) $ 47,000 $ 47,000 $ (186,000 ) Deferred tax benefit (expense) (10,000 ) (10,000 ) 39,000 Net unrecognized postretirement benefits included in accumulated other comprehensive income (loss) $ 37,000 $ 37,000 $ (147,000 )

Other Comprehensive Income (L_2

Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2019
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 nine months and quarter ended September 30, 2019 and 2018 . For the nine months ended September 30, For the quarter ended September 30, 2019 2018 2019 2018 Balance at beginning of period $ (5,051,000 ) $ (2,901,000 ) $ 2,750,000 $ (7,245,000 ) Unrealized gains (losses) arising during the period 11,074,000 (7,753,000 ) 1,199,000 (2,390,000 ) Reclassification of net realized gains during the period (15,000 ) (137,000 ) (15,000 ) (1,000 ) Related deferred taxes (2,322,000 ) 1,658,000 (248,000 ) 503,000 Net change 8,737,000 (6,232,000 ) 936,000 (1,888,000 ) Balance at end of period $ 3,686,000 $ (9,133,000 ) $ 3,686,000 $ (9,133,000 ) 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 nine months and quarter ended September 30, 2019 and 2018 . For the nine months ended September 30, For the quarter ended September 30, 2019 2018 2019 2018 Balance at beginning of period $ (197,000 ) $ (174,000 ) $ (190,000 ) $ (189,000 ) Amortization of net unrealized gains (losses) 10,000 (25,000 ) 1,000 (6,000 ) Related deferred taxes (2,000 ) 5,000 — 1,000 Net change 8,000 (20,000 ) 1,000 (5,000 ) Balance at end of period $ (189,000 ) $ (194,000 ) $ (189,000 ) $ (194,000 ) The following table presents the effect of the Company's derivative financial instruments included in other comprehensive income (loss) for the nine months and quarter ended September 30, 2019 and 2018 . For the nine months ended September 30, For the quarter ended September 30, 2019 2018 2019 2018 Balance at beginning of period $ 1,438,000 $ 1,544,000 $ 75,000 $ 2,066,000 Unrealized gains (losses) on cash flow hedging derivatives arising during the period (2,156,000 ) 934,000 (430,000 ) 273,000 Related deferred taxes 453,000 (196,000 ) 90,000 (57,000 ) Net change (1,703,000 ) 738,000 (340,000 ) 216,000 Balance at end of period $ (265,000 ) $ 2,282,000 $ (265,000 ) $ 2,282,000 The following table summarizes activity in the unrealized gain or loss on postretirement benefits included in other comprehensive income (loss) for the nine months and quarter ended September 30, 2019 and 2018 . For the nine months ended September 30, For the quarter ended September 30, 2019 2018 2019 2018 Unrecognized postretirement benefits at beginning of period $ 37,000 $ (147,000 ) $ 37,000 $ (147,000 ) Amortization of unrecognized transition obligation — — — — Change in unamortized net actuarial gain (loss) — — — — Related deferred taxes — — — — Unrecognized postretirement benefits at end of period $ 37,000 $ (147,000 ) $ 37,000 $ (147,000 )

Financial Derivative Instrume_2

Financial Derivative Instruments (Tables)	9 Months Ended
	Sep. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	The details of the interest rate swap agreements are as follows: September 30, 2019 December 31, 2018 Effective Date Maturity Date Variable Index Received Fixed Rate Paid Presentation on Consolidated Balance Sheet Notional Amount Fair Value Notional Amount Fair Value 06/27/2016 06/27/2021 1-Month USD LIBOR 0.893 % Other Assets $ 20,000,000 $ 214,000 $ 20,000,000 $ 763,000 06/28/2016 06/28/2021 1-Month USD LIBOR 0.940 % Other Assets 30,000,000 296,000 30,000,000 1,110,000 06/05/2018 12/05/2019 1-Month USD LIBOR 2.466 % Other Liabilities/Other Assets 25,000,000 (23,000 ) 25,000,000 16,000 06/05/2018 06/05/2020 1-Month USD LIBOR 2.547 % Other Liabilities 25,000,000 (140,000 ) 25,000,000 (9,000 ) 06/05/2018 12/05/2020 1-Month USD LIBOR 2.603 % Other Liabilities 25,000,000 (300,000 ) 25,000,000 (60,000 ) 12/05/2019 12/05/2022 3-Month USD LIBOR 1.779 % Other Liabilities 25,000,000 (217,000 ) — — 08/02/2019 08/02/2024 1-Month USD Libor 1.590 % Other Liabilities 12,500,000 (133,000 ) — — 08/05/2019 08/05/2024 1-Month USD Libor 1.420 % Other Liabilities 12,500,000 (32,000 ) — — $ 175,000,000 $ (335,000 ) $ 125,000,000 $ 1,820,000 At September 30, 2019 there was one customer loan swap arrangement in place, detailed below: September 30, 2019 December 31, 2018 Presentation on Consolidated Balance Sheet Number of Positions Notional Amount Fair Value Number of Positions Notional Amount Fair Value Pay Fixed, Receive Variable Other Liabilities 1 $ 12,914,000 $ (1,643,000 ) — — — Receive Fixed, Pay Variable Other Assets 1 12,914,000 1,643,000 — — — Total 2 $ 25,828,000 — — — —

Mortgage Servicing Rights (Tabl

Mortgage Servicing Rights (Tables)	9 Months Ended
	Sep. 30, 2019
Transfers and Servicing [Abstract]
Reconciliation of Mortgage Servicing Assets	Mortgage servicing rights are included in other assets and detailed in the following table: September 30, December 31, September 30, Mortgage servicing rights $ 5,985,000 $ 5,718,000 $ 5,611,000 Accumulated amortization (4,534,000 ) (4,364,000 ) (4,312,000 ) $ 1,451,000 $ 1,354,000 $ 1,299,000

Certificates of Deposit (Tables

Certificates of Deposit (Tables)	9 Months Ended
	Sep. 30, 2019
Banking and Thrift [Abstract]
Certificates of Deposit	The following table represents the breakdown of certificates of deposit at September 30, 2019 and 2018 , and at December 31, 2018 : September 30, 2019 December 31, 2018 September 30, 2018 Certificates of deposit < $100,000 $ 319,292,000 $ 372,464,000 $ 389,317,000 Certificates $100,000 to $250,000 278,050,000 162,185,000 168,402,000 Certificates $250,000 and over 64,431,000 56,760,000 61,690,000 $ 661,773,000 $ 591,409,000 $ 619,409,000

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
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 September 30, 2019 , December 31, 2018 and September 30, 2018 . At September 30, 2019 Level 1 Level 2 Level 3 Total Securities available for sale Mortgage-backed securities $ — $ 322,190,000 $ — $ 322,190,000 State and political subdivisions — 4,608,000 — 4,608,000 Total securities available for sale — 326,798,000 — 326,798,000 Interest rate swap agreements — 510,000 — 510,000 Customer loan interest swap agreements — 1,643,000 — 1,643,000 Total interest rate swap agreements $ — $ 2,153,000 $ — $ 2,153,000 Total assets $ — $ 328,951,000 $ — $ 328,951,000 At September 30, 2019 Level 1 Level 2 Level 3 Total Interest rate swap agreements $ — $ 845,000 $ — $ 845,000 Customer loan interest swap agreements — 1,643,000 — 1,643,000 Total liabilities $ — $ 2,488,000 $ — $ 2,488,000 At December 31, 2018 Level 1 Level 2 Level 3 Total Securities available for sale U.S. Government-sponsored agencies $ — $ 5,007,000 $ — $ 5,007,000 Mortgage-backed securities — 307,693,000 — 307,693,000 State and political subdivisions — 4,716,000 — 4,716,000 Total securities available for sale — 317,416,000 — 317,416,000 Interest rate swap agreements — 1,889,000 — 1,889,000 Total assets $ — $ 319,305,000 $ — $ 319,305,000 At December 31, 2018 Level 1 Level 2 Level 3 Total Interest rate swap agreements $ — $ 69,000 $ — $ 69,000 Total liabilities $ — $ 69,000 $ — $ 69,000 At September 30, 2018 Level 1 Level 2 Level 3 Total Securities available for sale U.S. Treasury and agency $ — $ 4,979,000 $ — $ 4,979,000 Mortgage-backed securities $ — $ 292,570,000 $ — $ 292,570,000 State and political subdivisions — 4,638,000 — 4,638,000 Total securities available for sale — 302,187,000 — 302,187,000 Interest rate swap agreements — 2,888,000 — 2,888,000 Total assets $ — $ 305,075,000 $ — $ 305,075,000
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. Other real estate owned is presented net of an allowance of $0 at September 30, 2019 , 2018 and December 31, 2018. 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 $1,763,000 , $2,096,000 and $2,109,000 at September 30, 2019 , December 31, 2018 , and September 30, 2018 , respectively. At September 30, 2019 Level 1 Level 2 Level 3 Total Other real estate owned $ — $ 279,000 $ — $ 279,000 Impaired loans — 7,143,000 — 7,143,000 Total assets $ — $ 7,422,000 $ — $ 7,422,000 At December 31, 2018 Level 1 Level 2 Level 3 Total Other real estate owned $ — $ 584,000 $ — $ 584,000 Impaired loans — 7,415,000 — 7,415,000 Total assets $ — $ 7,999,000 $ — $ 7,999,000 At September 30, 2018 Level 1 Level 2 Level 3 Total Other real estate owned $ — $ 584,000 $ — $ 584,000 Impaired loans — 7,024,000 — 7,024,000 Total assets $ — $ 7,608,000 $ — $ 7,608,000
Estimated Fair Value of Financial Instruments	The carrying amount and estimated fair values for financial instruments as of September 30, 2019 were as follows: Carrying value Estimated fair value Level 1 Level 2 Level 3 Financial assets Securities to be held to maturity $ 298,786,000 $ 306,647,000 $ — $ 306,647,000 $ — Loans (net of allowance for loan losses) Commercial Real estate 363,725,000 360,061,000 — 622,000 359,439,000 Construction 36,829,000 36,458,000 — — 36,458,000 Other 198,093,000 196,674,000 — 5,142,000 191,532,000 Municipal 36,492,000 36,192,000 — — 36,192,000 Residential Term 484,160,000 482,121,000 — 992,000 481,129,000 Construction 14,091,000 14,032,000 — — 14,032,000 Home equity line of credit 93,180,000 90,289,000 — 387,000 89,902,000 Consumer 25,124,000 23,318,000 — — 23,318,000 Total loans 1,251,694,000 1,239,145,000 — 7,143,000 1,232,002,000 Mortgage servicing rights 1,451,000 2,083,000 — 2,083,000 — Financial liabilities Local certificates of deposit $ 283,119,000 $ 285,598,000 $ — $ 285,598,000 $ — National certificates of deposit 378,654,000 379,995,000 — 379,995,000 — Total certificates of deposits 661,773,000 665,593,000 — 665,593,000 — Repurchase agreements 41,310,000 40,004,000 — 40,004,000 — Federal Home Loan Bank advances 140,107,000 140,008,000 — 140,008,000 — Total borrowed funds 181,417,000 180,012,000 — 180,012,000 — The carrying amounts and estimated fair values for financial instruments as of December 31, 2018 were as follows: Carrying value Estimated fair value Level 1 Level 2 Level 3 Financial assets Securities to be held to maturity $ 255,663,000 $ 250,900,000 $ — $ 250,900,000 $ — Loans (net of allowance for loan losses) Commercial Real estate 349,243,000 340,526,000 — 423,000 340,103,000 Construction 27,018,000 26,344,000 — — 26,344,000 Other 192,420,000 189,842,000 — 6,096,000 183,746,000 Municipal 51,101,000 50,965,000 — — 50,965,000 Residential Term 467,760,000 451,323,000 — 793,000 450,530,000 Construction 17,705,000 17,083,000 — — 17,083,000 Home equity line of credit 97,650,000 95,175,000 — 103,000 95,072,000 Consumer 24,154,000 22,530,000 — — 22,530,000 Total loans 1,227,051,000 1,193,788,000 — 7,415,000 1,186,373,000 Mortgage servicing rights 1,354,000 2,586,000 — 2,586,000 — Financial liabilities Local certificates of deposit $ 284,482,000 $ 281,282,000 $ — $ 281,282,000 $ — National certificates of deposit 306,927,000 307,508,000 — 307,508,000 — Total deposits 591,409,000 588,790,000 — 588,790,000 — Repurchase agreements 40,205,000 40,161,000 — 40,161,000 — Federal Home Loan Bank advances 170,112,000 169,240,000 — 169,240,000 — Total borrowed funds 210,317,000 209,401,000 — 209,401,000 — The carrying amount and estimated fair values for financial instruments as of September 30, 2018 were as follows: Carrying value Estimated fair value Level 1 Level 2 Level 3 Financial assets Securities to be held to maturity $ 257,395,000 $ 249,890,000 $ — $ 249,890,000 $ — Loans (net of allowance for loan losses) Commercial Real estate 362,199,000 359,421,000 — 423,000 358,998,000 Construction 23,639,000 23,458,000 — — 23,458,000 Other 183,935,000 184,116,000 — 6,033,000 178,083,000 Municipal 56,677,000 56,981,000 — — 56,981,000 Residential Term 458,174,000 459,561,000 — 475,000 459,086,000 Construction 18,124,000 18,095,000 — — 18,095,000 Home equity line of credit 104,373,000 103,209,000 — 93,000 103,116,000 Consumer 24,755,000 24,126,000 — — 24,126,000 Total loans 1,231,876,000 1,228,967,000 — 7,024,000 1,221,943,000 Mortgage servicing rights 1,299,000 2,572,000 — 2,572,000 — Financial liabilities Local certificates of deposit 252,440,000 253,014,000 — 253,014,000 — National certificates of deposit 366,969,000 368,127,000 — 368,127,000 — Total certificates of deposits 619,409,000 621,141,000 — 621,141,000 — Repurchase agreements 95,160,000 90,311,000 — 90,311,000 — Federal Home Loan Bank advances 170,114,000 170,058,000 — 170,058,000 — Total borrowed funds 265,274,000 260,369,000 — 260,369,000 —

Investment Securities - Amortiz

Investment Securities - Amortized Cost and Estimated Fair Value of Available for Sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 322,133	$ 323,809	$ 313,748
Unrealized Gains	5,355	578	77
Unrealized Losses	(690)	(6,971)	(11,638)
Fair Value (Estimated)	326,798	317,416	302,187
U.S. Government-sponsored agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		5,000	5,000
Unrealized Gains		7	0
Unrealized Losses		0	(21)
Fair Value (Estimated)		5,007	4,979
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	317,553	313,854	303,793
Unrealized Gains	5,327	571	77
Unrealized Losses	(690)	(6,732)	(11,300)
Fair Value (Estimated)	322,190	307,693	292,570
State and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	4,580	4,955	4,955
Unrealized Gains	28	0	0
Unrealized Losses	0	(239)	(317)
Fair Value (Estimated)	$ 4,608	$ 4,716	$ 4,638

Investment Securities - Amort_2

Investment Securities - Amortized Cost and Estimated Fair Value of Held to Maturity Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 298,786	$ 255,663	$ 257,395
Unrealized Gains	7,925	1,382	965
Unrealized Losses	(64)	(6,145)	(8,470)
Fair Value (Estimated)	306,647	250,900	249,890
U.S. Government-sponsored agencies
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	32,840	11,155	11,155
Unrealized Gains	93	0	0
Unrealized Losses	0	(472)	(767)
Fair Value (Estimated)	32,933	10,683	10,388
Mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	15,584	18,250	19,244
Unrealized Gains	502	336	326
Unrealized Losses	(16)	(255)	(460)
Fair Value (Estimated)	16,070	18,331	19,110
State and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	236,612	221,958	222,696
Unrealized Gains	7,136	1,046	639
Unrealized Losses	(48)	(5,418)	(7,243)
Fair Value (Estimated)	243,700	217,586	216,092
Corporate securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	13,750	4,300	4,300
Unrealized Gains	194	0	0
Unrealized Losses	0	0	0
Fair Value (Estimated)	$ 13,944	$ 4,300	$ 4,300

Investment Securities - Amort_3

Investment Securities - Amortized Cost and Estimated Fair Value of Restricted Equity Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Federal Home Loan Bank Stock	$ 7,945	$ 10,549	$ 10,549
Federal Reserve Bank Stock	1,037	1,037	1,037
Restricted equity securities	$ 8,982	$ 11,586	$ 11,586

Investment Securities - Contrac

Investment Securities - Contractual Maturities of Investment Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Debt Securities, Available-for-sale, Amortized Cost, Fiscal Year Maturity [Abstract]
Due in 1 year or less, Securities available for sale, Amortized Cost	$ 189	$ 0	$ 0
Due in 1 to 5 years, Securities available for sale, Amortized Cost	36,304	13,501	13,961
Due in 5 to 10 years, Securities available for sale, Amortized Cost	91,242	83,954	69,317
Due after 10 years, Securities available for sale, Amortized Cost	194,398	226,354	230,470
Amortized Cost	322,133	323,809	313,748
Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract]
Due in 1 year or less, Securities available for sale, Fair Value (Estimated)	189	0	0
Due in 1 to 5 years, Securities available for sale, Fair Value (Estimated)	36,703	13,518	13,886
Due in 5 to 10 years, Securities available for sale, Fair Value (Estimated)	93,419	83,326	67,434
Due after 10 years, Securities available for sale, Fair Value (Estimated)	196,487	220,572	220,867
Securities available for sale, Fair Value (Estimated)	326,798	317,416	302,187
Debt Securities, Held-to-maturity, Maturity, Amortized Cost, Net [Abstract]
Due in 1 year or less, Securities to be held to maturity, Amortized Cost	1,241	1,432	1,796
Due in 1 to 5 years, Securities to be held to maturity, Amortized Cost	23,460	20,717	21,463
Due in 5 to 10 years, Securities to be held to maturity, Amortized Cost	184,234	157,544	155,997
Due after 10 years, Securities to be held to maturity, Amortized Cost	89,851	75,970	78,139
Securities to be held to maturity, Amortized Cost	298,786	255,663	257,395
Debt Securities, Held-to-maturity, Maturity, Fair Value [Abstract]
Due in 1 year or less, Securities to be held to maturity, Fair Value (Estimated)	1,245	1,433	1,800
Due in 1 to 5 years, Securities to be held to maturity, Fair Value (Estimated)	23,920	20,778	21,468
Due in 5 to 10 years, Securities to be held to maturity, Fair Value (Estimated)	188,811	155,313	152,154
Due after 10 years, Securities to be held to maturity, Fair Value (Estimated)	92,671	73,376	74,468
Securities to be held to maturity, Fair Value (Estimated)	$ 306,647	$ 250,900	$ 249,890

Investment Securities - Additio

Investment Securities - Additional Information (Details) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2019USD ($)securitystate	Sep. 30, 2018USD ($)security	Dec. 31, 2018USD ($)security	Sep. 30, 2014USD ($)
Investment [Line Items]
Number of securities temporarily impaired (security) | security	60	596	511
Number of securities temporarily impaired for twelve months or more (security) | security	29	185	232
Length of time securities temporarily impaired	12 months	12 months	12 months
Amortized cost of transferred securities from available-for-sale to held-to-maturity				$ 89,780
Fair value of transferred securities from available-for-sale to held-to-maturity				89,757
Net unrealized loss, net of taxes on transferred securities				$ 15
Unamortized balance of net unrealized losses	$ 189	$ 194	$ 197
Number of states in New England where FHLB serve (state) | state	6
FHLB stock investment	$ 7,945	10,549	10,549
Other equity securities
Investment [Line Items]
Fair value of securities pledged as collateral	$ 216,903	$ 302,129	$ 222,829
State and political subdivisions
Investment [Line Items]
Percentage of overall security holdings downgraded	0.13%

Investment Securities - Gains a

Investment Securities - Gains and Losses (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Proceeds from Sale and Maturity of Marketable Securities	$ 4,725,000		$ 4,725,000
Proceeds from sales of securities		$ 0	3,835,000	$ 459,000
Gross realized gains	82,000	1,000	82,000	137,000
Gross realized losses	(67,000)	0	(67,000)	0
Net gain	15,000	1,000	15,000	137,000
Related income taxes	$ 3,000	$ 0	$ 3,000	$ 29,000

Investment Securities - Tempora

Investment Securities - Temporarily Impaired Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Debt Securities, Available-for-sale [Line Items]
Fair Value (Estimated) (Less than 12 months)	$ 35,322	$ 152,859	$ 267,597
Unrealized Losses (Less than 12 months)	(275)	(2,845)	(7,835)
Fair Value (Estimated) (12 months or more)	22,875	240,871	189,876
Unrealized Losses (12 months or more)	(479)	(10,271)	(12,273)
Fair Value (Estimated)	58,197	393,730	457,473
Unrealized Losses	(754)	(13,116)	(20,108)
U.S. Government-sponsored agencies
Debt Securities, Available-for-sale [Line Items]
Fair Value (Estimated) (Less than 12 months)		0	7,753
Unrealized Losses (Less than 12 months)		0	(247)
Fair Value (Estimated) (12 months or more)		10,683	7,614
Unrealized Losses (12 months or more)		(472)	(541)
Fair Value (Estimated)		10,683	15,367
Unrealized Losses		(472)	(788)
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Fair Value (Estimated) (Less than 12 months)	30,249	76,050	154,611
Unrealized Losses (Less than 12 months)	(233)	(1,061)	(4,333)
Fair Value (Estimated) (12 months or more)	22,569	185,136	143,771
Unrealized Losses (12 months or more)	(473)	(5,926)	(7,427)
Fair Value (Estimated)	52,818	261,186	298,382
Unrealized Losses	(706)	(6,987)	(11,760)
State and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Fair Value (Estimated) (Less than 12 months)	5,073	76,809	105,233
Unrealized Losses (Less than 12 months)	(42)	(1,784)	(3,255)
Fair Value (Estimated) (12 months or more)	306	45,052	38,491
Unrealized Losses (12 months or more)	(6)	(3,873)	(4,305)
Fair Value (Estimated)	5,379	121,861	143,724
Unrealized Losses	$ (48)	$ (5,657)	$ (7,560)

Loans - Loan Portfolio (Details

Loans - Loan Portfolio (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Schedule of Financing Receivables [Line Items]
Loans	$ 1,263,459	$ 1,238,283	$ 1,243,558
Percentage of loans receivable, by type	100.00%	100.00%	100.00%
Commercial | Real estate
Schedule of Financing Receivables [Line Items]
Loans	$ 368,165	$ 353,243	$ 366,390
Percentage of loans receivable, by type	29.10%	28.50%	29.50%
Commercial | Construction
Schedule of Financing Receivables [Line Items]
Loans	$ 37,242	$ 27,304	$ 23,889
Percentage of loans receivable, by type	2.90%	2.20%	1.90%
Commercial | Other
Schedule of Financing Receivables [Line Items]
Loans	$ 201,859	$ 196,391	$ 188,128
Percentage of loans receivable, by type	16.00%	15.90%	15.10%
Municipal
Schedule of Financing Receivables [Line Items]
Loans	$ 36,522	$ 51,128	$ 56,704
Percentage of loans receivable, by type	2.90%	4.10%	4.60%
Residential | Construction
Schedule of Financing Receivables [Line Items]
Loans	$ 14,118	$ 17,743	$ 18,166
Percentage of loans receivable, by type	1.10%	1.40%	1.50%
Residential | Term
Schedule of Financing Receivables [Line Items]
Loans	$ 485,490	$ 469,145	$ 459,449
Percentage of loans receivable, by type	38.40%	37.90%	36.80%
Home equity line of credit
Schedule of Financing Receivables [Line Items]
Loans	$ 94,144	$ 98,469	$ 105,213
Percentage of loans receivable, by type	7.50%	8.00%	8.50%
Consumer
Schedule of Financing Receivables [Line Items]
Loans	$ 25,919	$ 24,860	$ 25,619
Percentage of loans receivable, by type	2.10%	2.00%	2.10%

Loans - Narrative (Details)

Loans - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019USD ($)loan	Sep. 30, 2018USD ($)loan	Sep. 30, 2019USD ($)loan	Sep. 30, 2018USD ($)loan	Dec. 31, 2018USD ($)loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net deferred loan costs	$ 7,181	$ 6,428	$ 7,181	$ 6,428	$ 6,615
Qualifying first mortgage loans	308,163	311,152	308,163	311,152	290,138
Loans pledged as collateral	254,076	229,769	$ 254,076	$ 229,769	$ 237,152
Loans classified as TDR (loan) | loan			82	71	76
Value of loans classified as TDR	$ 24,281	$ 25,661	$ 24,281	$ 25,661	$ 25,222
Number of loans | loan	9	10	9	10
Value of TDR loans more than 30 days past due	$ 1,084	$ 1,271	$ 1,084	$ 1,271
Number of TDR loans more than 30 days past due (loan) | loan	4	1	4	1
Number of loans placed on TDR status (loan) | loan	2	1	10	11
Number of TDR loans involved in bankruptcy (loan) | loan	9		9
Value of TDR loans involved in bankruptcy	$ 1,004		$ 1,004
Number of TDR loans on non-accrual status (loan) | loan	26		26
Value of TDR loans on non-accrual status	$ 8,932		$ 8,932
Number of TDR loans in the process of foreclosure (loan) | loan	3		3
Loans classified as TDRs in process of foreclosure	$ 398		$ 398
Number of mortgage loans in the process of foreclosure (loan) | loan	15	14	15	14
Value of mortgage loans in the process of foreclosure	$ 1,649	$ 1,337	$ 1,649	$ 1,337
Unallocated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of days past due			30 days	30 days

Loans - Past-due Status of Loan

Loans - Past-due Status of Loans by Class (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Schedule of Financing Receivables [Line Items]
All Past Due	$ 9,814	$ 13,375	$ 10,373
Current	1,253,645	1,224,908	1,233,185
Total	1,263,459	1,238,283	1,243,558
90 Days or More & Accruing	18	351	249
30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	1,931	5,958	3,627
60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	2,191	3,977	3,644
90 Days or More Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	5,692	3,440	3,102
Commercial | Real estate
Schedule of Financing Receivables [Line Items]
All Past Due	1,199	2,051	808
Current	366,966	351,192	365,582
Total	368,165	353,243	366,390
90 Days or More & Accruing	0	0	0
Commercial | Real estate | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	305	1,274	305
Commercial | Real estate | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	233	0	0
Commercial | Real estate | 90 Days or More Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	661	777	503
Commercial | Construction
Schedule of Financing Receivables [Line Items]
All Past Due	293	10	0
Current	36,949	27,294	23,889
Total	37,242	27,304	23,889
90 Days or More & Accruing	0	0	0
Commercial | Construction | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	14	0	0
Commercial | Construction | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	279	10	0
Commercial | Construction | 90 Days or More Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	0	0	0
Commercial | Other
Schedule of Financing Receivables [Line Items]
All Past Due	663	580	1,382
Current	201,196	195,811	186,746
Total	201,859	196,391	188,128
90 Days or More & Accruing	0	0	0
Commercial | Other | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	35	455	440
Commercial | Other | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	289	5	526
Commercial | Other | 90 Days or More Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	339	120	416
Municipal
Schedule of Financing Receivables [Line Items]
All Past Due	0	0	0
Current	36,522	51,128	56,704
Total	36,522	51,128	56,704
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	0	76	0
Current	14,118	17,667	18,166
Total	14,118	17,743	18,166
90 Days or More & Accruing	0	0	0
Residential | Construction | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	0	76	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	5,223	6,638	5,105
Current	480,267	462,507	454,344
Total	485,490	469,145	459,449
90 Days or More & Accruing	0	339	199
Residential | Term | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	650	1,097	838
Residential | Term | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	767	3,518	2,701
Residential | Term | 90 Days or More Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	3,806	2,023	1,566
Home equity line of credit
Schedule of Financing Receivables [Line Items]
All Past Due	1,867	3,731	2,851
Current	92,277	94,738	102,362
Total	94,144	98,469	105,213
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	693	2,819	1,883
Home equity line of credit | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	306	419	403
Home equity line of credit | 90 Days or More Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	868	493	565
Consumer
Schedule of Financing Receivables [Line Items]
All Past Due	569	289	227
Current	25,350	24,571	25,392
Total	25,919	24,860	25,619
90 Days or More & Accruing	18	12	50
Consumer | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	234	237	161
Consumer | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	317	25	14
Consumer | 90 Days or More Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	$ 18	$ 27	$ 52

Loans - Nonaccrual Loans (Detai

Loans - Nonaccrual Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	$ 16,858	$ 14,727	$ 14,172
Commercial | Real estate
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	1,807	1,226	964
Commercial | Construction
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	256	0	0
Commercial | Other
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	6,871	8,664	9,330
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	6,840	4,062	3,042
Home equity line of credit
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	1,078	760	834
Consumer
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	$ 6	$ 15	$ 2

Loans - Impaired Loans by Class

Loans - Impaired Loans by Class (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded investment, with no related allowance	$ 20,693	$ 18,708	$ 20,693	$ 18,708	$ 21,030
Recorded investment, with related allowance	11,516	13,390	11,516	13,390	10,721
Recorded Investment	32,209	32,098	32,209	32,098	31,751
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no related allowance	22,738	20,389	22,738	20,389	22,831
Unpaid principal balance with related allowance	12,398	13,905	12,398	13,905	11,397
Unpaid Principal Balance	35,136	34,294	35,136	34,294	34,228
Related Allowance	2,060	2,402	2,060	2,402	2,308
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment, with no related allowance	20,547	18,815	20,697	18,561	18,776
Average recorded investment, with related allowance	11,294	13,352	10,862	13,191	13,029
Average Recorded Investment	31,841	32,167	31,559	31,752	31,805
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized interest income, with no related allowance	172	180	541	488	764
Recognized interest income, with related allowance	49	52	134	167	100
Recognized Interest Income	221	232	675	655	864
Commercial | Real estate
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded investment, with no related allowance	7,332	5,954	7,332	5,954	8,718
Recorded investment, with related allowance	1,717	3,456	1,717	3,456	1,042
Recorded Investment	9,049	9,410	9,049	9,410	9,760
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no related allowance	7,630	6,275	7,630	6,275	9,161
Unpaid principal balance with related allowance	1,732	3,474	1,732	3,474	1,059
Unpaid Principal Balance	9,362	9,749	9,362	9,749	10,220
Related Allowance	258	265	258	265	260
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment, with no related allowance	7,242	5,966	7,929	5,099	5,536
Average recorded investment, with related allowance	1,721	3,461	1,538	3,700	3,477
Average Recorded Investment	8,963	9,427	9,467	8,799	9,013
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized interest income, with no related allowance	83	84	266	194	380
Recognized interest income, with related allowance	23	30	72	97	42
Recognized Interest Income	106	114	338	291	422
Commercial | Construction
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded investment, with no related allowance	978	741	978	741	721
Recorded investment, with related allowance	0	0	0	0	0
Recorded Investment	978	741	978	741	721
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no related allowance	990	741	990	741	721
Unpaid principal balance with related allowance	0	0	0	0	0
Unpaid Principal Balance	990	741	990	741	721
Related Allowance	0	0	0	0	0
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment, with no related allowance	980	741	929	773	762
Average recorded investment, with related allowance	0	0	0	0	0
Average Recorded Investment	980	741	929	773	762
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized interest income, with no related allowance	12	11	35	32	43
Recognized interest income, with related allowance	0	0	0	0	0
Recognized Interest Income	12	11	35	32	43
Commercial | Other
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded investment, with no related allowance	892	1,926	892	1,926	1,468
Recorded investment, with related allowance	6,440	7,923	6,440	7,923	7,791
Recorded Investment	7,332	9,849	7,332	9,849	9,259
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no related allowance	930	2,044	930	2,044	1,555
Unpaid principal balance with related allowance	6,949	8,231	6,949	8,231	8,216
Unpaid Principal Balance	7,879	10,275	7,879	10,275	9,771
Related Allowance	1,275	1,890	1,275	1,890	1,696
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment, with no related allowance	921	1,865	997	2,146	2,037
Average recorded investment, with related allowance	6,465	7,682	6,918	7,345	7,471
Average Recorded Investment	7,386	9,547	7,915	9,491	9,508
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized interest income, with no related allowance	8	8	22	25	32
Recognized interest income, with related allowance	1	0	1	0	5
Recognized Interest Income	9	8	23	25	37
Municipal
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded investment, with no related allowance	0	0	0	0	0
Recorded investment, with related allowance	0	0	0	0	0
Recorded Investment	0	0	0	0	0
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no related allowance	0	0	0	0	0
Unpaid principal balance with related allowance	0	0	0	0	0
Unpaid Principal Balance	0	0	0	0	0
Related Allowance	0	0	0	0	0
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment, with no related allowance	0	0	0	0	0
Average recorded investment, with related allowance	0	0	0	0	0
Average Recorded Investment	0	0	0	0	0
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized interest income, with no related allowance	0	0	0	0	0
Recognized interest income, with related allowance	0	0	0	0	0
Recognized Interest Income	0	0	0	0	0
Residential | Construction
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded investment, with no related allowance	0	0	0	0	0
Recorded investment, with related allowance	0	0	0	0	0
Recorded Investment	0	0	0	0	0
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no related allowance	0	0	0	0	0
Unpaid principal balance with related allowance	0	0	0	0	0
Unpaid Principal Balance	0	0	0	0	0
Related Allowance	0	0	0	0	0
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment, with no related allowance	0	0	0	0	0
Average recorded investment, with related allowance	0	0	0	0	0
Average Recorded Investment	0	0	0	0	0
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized interest income, with no related allowance	0	0	0	0	0
Recognized interest income, with related allowance	0	0	0	0	0
Recognized Interest Income	0	0	0	0	0
Residential | Term
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded investment, with no related allowance	10,664	9,019	10,664	9,019	9,136
Recorded investment, with related allowance	2,782	1,909	2,782	1,909	1,768
Recorded Investment	13,446	10,928	13,446	10,928	10,904
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no related allowance	12,305	10,201	12,305	10,201	10,317
Unpaid principal balance with related allowance	3,121	2,085	3,121	2,085	1,998
Unpaid Principal Balance	15,426	12,286	15,426	12,286	12,315
Related Allowance	337	238	337	238	335
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment, with no related allowance	10,487	9,200	9,877	9,515	9,427
Average recorded investment, with related allowance	2,858	2,108	2,306	2,054	1,982
Average Recorded Investment	13,345	11,308	12,183	11,569	11,409
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized interest income, with no related allowance	63	71	202	222	289
Recognized interest income, with related allowance	25	22	61	70	53
Recognized Interest Income	88	93	263	292	342
Home equity line of credit
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded investment, with no related allowance	827	1,068	827	1,068	972
Recorded investment, with related allowance	571	100	571	100	120
Recorded Investment	1,398	1,168	1,398	1,168	1,092
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no related allowance	883	1,128	883	1,128	1,035
Unpaid principal balance with related allowance	590	100	590	100	124
Unpaid Principal Balance	1,473	1,228	1,473	1,228	1,159
Related Allowance	184	7	184	7	17
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment, with no related allowance	917	1,033	965	1,014	1,001
Average recorded investment, with related allowance	248	100	99	92	99
Average Recorded Investment	1,165	1,133	1,064	1,106	1,100
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized interest income, with no related allowance	6	6	16	15	20
Recognized interest income, with related allowance	0	0	0	0	0
Recognized Interest Income	6	6	16	15	20
Consumer
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded investment, with no related allowance	0	0	0	0	15
Recorded investment, with related allowance	6	2	6	2	0
Recorded Investment	6	2	6	2	15
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no related allowance	0	0	0	0	42
Unpaid principal balance with related allowance	6	15	6	15	0
Unpaid Principal Balance	6	15	6	15	42
Related Allowance	6	2	6	2	0
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment, with no related allowance	0	10	0	14	13
Average recorded investment, with related allowance	2	1	1	0	0
Average Recorded Investment	2	11	1	14	13
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized interest income, with no related allowance	0	0	0	0	0
Recognized interest income, with related allowance	0	0	0	0	0
Recognized Interest Income	$ 0	$ 0	$ 0	$ 0	$ 0

Loans - TDR's by Class and Spec

Loans - TDR's by Class and Specific Reserves (Details) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2019USD ($)loan	Sep. 30, 2018USD ($)loan	Dec. 31, 2018USD ($)loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	82	71	76
Balance	$ 24,281	$ 25,661	$ 25,222
Specific Reserves	$ 1,683	$ 1,476	$ 1,568
Commercial | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	19	16	17
Balance	$ 7,559	$ 8,542	$ 8,631
Specific Reserves	$ 249	$ 138	$ 132
Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	1	1	1
Balance	$ 721	$ 741	$ 721
Specific Reserves	$ 0	$ 0	$ 0
Commercial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	7	5	10
Balance	$ 6,951	$ 7,007	$ 7,298
Specific Reserves	$ 1,232	$ 1,100	$ 1,276
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	52	46	45
Balance	$ 8,563	$ 8,869	$ 8,074
Specific Reserves	$ 202	$ 238	$ 160
Home equity line of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	3	3	3
Balance	$ 487	$ 502	$ 498
Specific Reserves	$ 0	$ 0	$ 0
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	0	0	0
Balance	$ 0	$ 0	$ 0
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	Sep. 30, 2019USD ($)loan	Sep. 30, 2018USD ($)loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of TDR loans more than 30 days past due (loan) | loan	4	1
Number of loans | loan	9	10
Balance	$ 1,084	$ 1,271
Specific Reserves	$ 142	$ 5
Commercial | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans | loan	0	0
Balance	$ 0	$ 0
Specific Reserves	$ 0	$ 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	3	1
Balance	$ 251	$ 138
Specific Reserves	$ 131	$ 0
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	5	8
Balance	$ 666	$ 966
Specific Reserves	$ 11	$ 5
Home equity line of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans | loan	1	1
Balance	$ 167	$ 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		9 Months Ended
	Sep. 30, 2019USD ($)loan	Sep. 30, 2018USD ($)loan	Sep. 30, 2019USD ($)loan	Sep. 30, 2018USD ($)loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	2	1	10	11
Pre-Modification Outstanding Recorded Investment	$ 317	$ 552	$ 1,108	$ 8,776
Post-Modification Outstanding Recorded Investment	276	552	977	8,529
Specific Reserves	$ 0	$ 0	$ 168	$ 1,168
Commercial | Real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	1	2	8
Pre-Modification Outstanding Recorded Investment	$ 0	$ 552	$ 110	$ 1,608
Post-Modification Outstanding Recorded Investment	0	552	95	1,606
Specific Reserves	$ 0	$ 0	$ 95	$ 42
Commercial | Construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	0	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	0	0	0	0
Specific Reserves	$ 0	$ 0	$ 0	$ 0
Commercial | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	0	0	1
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 6,727
Post-Modification Outstanding Recorded Investment	0	0	0	6,487
Specific Reserves	$ 0	$ 0	$ 0	$ 1,100
Municipal
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	0	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	0	0	0	0
Specific Reserves	$ 0	$ 0	$ 0	$ 0
Residential | Construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	0	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	0	0	0	0
Specific Reserves	$ 0	$ 0	$ 0	$ 0
Residential | Term
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	2	0	8	2
Pre-Modification Outstanding Recorded Investment	$ 317	$ 0	$ 998	$ 441
Post-Modification Outstanding Recorded Investment	276	0	882	436
Specific Reserves	$ 0	$ 0	$ 73	$ 26
Home equity line of credit
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	0	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	0	0	0	0
Specific Reserves	$ 0	$ 0	$ 0	$ 0
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	0	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	0	0	0	0
Specific Reserves	$ 0	$ 0	$ 0	$ 0

Allowance for Loan Losses - Nar

Allowance for Loan Losses - Narrative (Details) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019USD ($)loan_class	Dec. 31, 2018USD ($)	Jun. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Jun. 30, 2018USD ($)	Dec. 31, 2017USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of classes in the loan portfolio | loan_class	8
Allowance for loan and lease losses (as a percentage)	0.48%	0.45%
Allowance for loan and lease losses, period increase (decrease)	$ 438
Allowance for loan losses	$ 11,765	$ 11,232	$ 11,471	$ 11,682	$ 11,472	$ 10,729
Allowance for loan losses as a percent of total loans	0.93%	0.91%		0.94%
Number of classes in the commercial loan portfolio | loan_class	3
Residential loans typical loan to value range (as a percentage)	80.00%
Number of classes in the residential loan portfolio | loan_class	2
Construction loans accrual to company capital	27.60%
Constructions loan portfolio maximum to company capital	100.00%
Construction and non owner occupied commercial real estate	123.70%
Maximum loan portfolio to company capital	300.00%
Outstanding loans and commitments subject by independent consulting firm	60.00%
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 680	$ 630	649	$ 740	575	545
Delinquent period before consumer loans charged off	120 days
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan-to-value ratio	0.80
Amortization term of residential loans	30 years
Delinquent period before residential loans placed on non accrual status	90 days
Delinquent period for loans charged off	180 days
Delinquency period for loans charged off after receipt of notification from bankruptcy court	60 days
Home equity line of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 824	730	633	719	678	692
Loan-to-value ratio	0.80
Loan maturities	300 months
Unallocated Reserves
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 1,707	$ 1,216		1,678
Total reserve allowance accounted for by loan loss allowances (percent)	14.50%	10.80%
Construction | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 23	$ 34	$ 23	$ 36	$ 29	$ 36
Loan maturities	1 year
Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential loans typical loan to value range (as a percentage)	75.00%
Collateralized consumer loans to individuals loan to value maximum range (as a percentage)	80.00%
Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential loans typical loan to value range (as a percentage)	80.00%
Collateralized consumer loans to individuals loan to value maximum range (as a percentage)	90.00%

Allowance for Loan Losses - Fin

Allowance for Loan Losses - Financing Receivable and Allowance Element by Class (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 11,765	$ 11,471	$ 11,232	$ 11,682	$ 11,472	$ 10,729
Specific Reserves on Loans Evaluated Individually for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	2,060		2,308	2,402
General Reserves on Loans Based on Historical Loss Experience
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	1,937		2,085	2,198
Reserves for Qualitative Factors
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	6,061		5,623	5,404
Unallocated Reserves
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	1,707		1,216	1,678
Commercial | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	3,795	3,609	3,567	3,589	3,732	3,872
Commercial | Real estate | Specific Reserves on Loans Evaluated Individually for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	258		260	265
Commercial | Real estate | General Reserves on Loans Based on Historical Loss Experience
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	792		742	758
Commercial | Real estate | Reserves for Qualitative Factors
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	2,745		2,565	2,566
Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	353	309	255	214	399	434
Commercial | Construction | Specific Reserves on Loans Evaluated Individually for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	0		0	0
Commercial | Construction | General Reserves on Loans Based on Historical Loss Experience
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	79		57	49
Commercial | Construction | Reserves for Qualitative Factors
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	274		198	165
Commercial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	3,220	3,281	3,541	3,591	3,475	3,358
Commercial | Other | Specific Reserves on Loans Evaluated Individually for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	1,275		1,696	1,890
Commercial | Other | General Reserves on Loans Based on Historical Loss Experience
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	436		414	388
Commercial | Other | Reserves for Qualitative Factors
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	1,509		1,431	1,313
Municipal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	26	25	24	23	21	20
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	26		24	23
Residential | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	23	23	34	36	29	36
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	5		12	13
Residential | Construction | Reserves for Qualitative Factors
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	18		22	23
Residential | Term
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	1,137	1,106	1,235	1,092	1,138	1,130
Residential | Term | Specific Reserves on Loans Evaluated Individually for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	337		335	238
Residential | Term | General Reserves on Loans Based on Historical Loss Experience
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	185		326	313
Residential | Term | Reserves for Qualitative Factors
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	615		574	541
Home equity line of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	824	633	730	719	678	692
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	184		17	7
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	155		263	280
Home equity line of credit | Reserves for Qualitative Factors
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	485		450	432
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	680	649	630	740	575	545
Consumer | Specific Reserves on Loans Evaluated Individually for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	6		0	2
Consumer | General Reserves on Loans Based on Historical Loss Experience
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	285		271	397
Consumer | Reserves for Qualitative Factors
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	389		359	341
Unallocated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	1,707	$ 1,836	1,216	1,678	$ 1,425	$ 642
Unallocated | Unallocated Reserves
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 1,707		$ 1,216	$ 1,678

Allowance for Loan Losses - Ris

Allowance for Loan Losses - Risk Ratings by Segment (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	$ 643,788	$ 628,066	$ 635,111
1 Strong
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	3,870	3,444	2,558
2 Above Average
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	52,233	63,885	71,146
3 Satisfactory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	132,849	129,105	126,044
4 Average
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	295,354	275,268	293,984
5 Watch
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	130,039	117,841	106,636
6 OAEM
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	2,574	8,695	2,755
7 Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	26,869	29,705	31,865
8 Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	0	123	123
Commercial | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	368,165	353,243	366,390
Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	37,242	27,304	23,889
Commercial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	201,859	196,391	188,128
Commercial | 1 Strong | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	0	0	0
Commercial | 1 Strong | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	0	0	0
Commercial | 1 Strong | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	3,835	3,444	2,558
Commercial | 2 Above Average | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	12,595	10,484	10,710
Commercial | 2 Above Average | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	34	37	38
Commercial | 2 Above Average | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	5,836	4,564	4,845
Commercial | 3 Satisfactory | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	84,567	80,266	78,794
Commercial | 3 Satisfactory | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	2,154	2,231	1,810
Commercial | 3 Satisfactory | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	45,742	46,090	44,888
Commercial | 4 Average | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	186,605	172,597	196,883
Commercial | 4 Average | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	20,931	18,780	16,331
Commercial | 4 Average | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	85,485	82,081	80,171
Commercial | 5 Watch | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	67,674	66,325	62,036
Commercial | 5 Watch | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	13,867	5,970	5,424
Commercial | 5 Watch | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	48,498	45,546	39,176
Commercial | 6 OAEM | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	504	6,890	1,387
Commercial | 6 OAEM | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	0	0	0
Commercial | 6 OAEM | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	2,070	1,805	1,368
Commercial | 7 Substandard | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	16,220	16,558	16,457
Commercial | 7 Substandard | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	256	286	286
Commercial | 7 Substandard | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	10,393	12,861	15,122
Commercial | 8 Doubtful | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	0	123	123
Commercial | 8 Doubtful | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	0	0	0
Commercial | 8 Doubtful | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	0	0	0
Municipal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	36,522	51,128	56,704
Municipal | 1 Strong
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	35	0	0
Municipal | 2 Above Average
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	33,768	48,800	55,553
Municipal | 3 Satisfactory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	386	518	552
Municipal | 4 Average
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	2,333	1,810	599
Municipal | 5 Watch
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	0	0	0
Municipal | 6 OAEM
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	0	0	0
Municipal | 7 Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	0	0	0
Municipal | 8 Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	$ 0	$ 0	$ 0

Allowance for Loan Losses - All

Allowance for Loan Losses - Allowance for Loan Loss Activity by Class (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 11,471	$ 11,472	$ 11,232	$ 10,729	$ 10,729
Charge offs	62	223	542	596	1,273
Recoveries	106	100	200	216	276
Provision for loan losses	250	333	875	1,333	1,500
Ending balance	11,765	11,682	11,765	11,682	11,232
Ending balance specifically evaluated for impairment	2,060	2,402	2,060	2,402	2,308
Ending balance collectively evaluated for impairment	9,705	9,280	9,705	9,280	8,924
Total	1,263,459	1,243,558	1,263,459	1,243,558	1,238,283
Ending balance specifically evaluated for impairment	32,209	32,098	32,209	32,098	31,751
Ending balance collectively evaluated for impairment	1,231,250	1,211,460	1,231,250	1,211,460	1,206,532
Commercial | Real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,609	3,732	3,567	3,872	3,872
Charge offs	0	0	53	0	168
Recoveries	2	52	15	52	52
Provision for loan losses	184	(195)	266	(335)	(189)
Ending balance	3,795	3,589	3,795	3,589	3,567
Ending balance specifically evaluated for impairment	258	265	258	265	260
Ending balance collectively evaluated for impairment	3,537	3,324	3,537	3,324	3,307
Total	368,165	366,390	368,165	366,390	353,243
Ending balance specifically evaluated for impairment	9,049	9,410	9,049	9,410	9,760
Ending balance collectively evaluated for impairment	359,116	356,980	359,116	356,980	343,483
Commercial | Construction
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	309	399	255	434	434
Charge offs	0	0	0	0	0
Recoveries	0	0	0	0	0
Provision for loan losses	44	(185)	98	(220)	(179)
Ending balance	353	214	353	214	255
Ending balance specifically evaluated for impairment	0	0	0	0	0
Ending balance collectively evaluated for impairment	353	214	353	214	255
Total	37,242	23,889	37,242	23,889	27,304
Ending balance specifically evaluated for impairment	978	741	978	741	721
Ending balance collectively evaluated for impairment	36,264	23,148	36,264	23,148	26,583
Commercial | Other
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,281	3,475	3,541	3,358	3,358
Charge offs	14	51	123	68	423
Recoveries	68	23	70	33	40
Provision for loan losses	(115)	144	(268)	268	566
Ending balance	3,220	3,591	3,220	3,591	3,541
Ending balance specifically evaluated for impairment	1,275	1,890	1,275	1,890	1,696
Ending balance collectively evaluated for impairment	1,945	1,701	1,945	1,701	1,845
Total	201,859	188,128	201,859	188,128	196,391
Ending balance specifically evaluated for impairment	7,332	9,849	7,332	9,849	9,259
Ending balance collectively evaluated for impairment	194,527	178,279	194,527	178,279	187,132
Municipal
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	25	21	24	20	20
Charge offs	0	0	0	0	0
Recoveries	0	0	0	0	0
Provision for loan losses	1	2	2	3	4
Ending balance	26	23	26	23	24
Ending balance specifically evaluated for impairment	0	0	0	0	0
Ending balance collectively evaluated for impairment	26	23	26	23	24
Total	36,522	56,704	36,522	56,704	51,128
Ending balance specifically evaluated for impairment	0	0	0	0	0
Ending balance collectively evaluated for impairment	36,522	56,704	36,522	56,704	51,128
Residential | Construction
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	23	29	34	36	36
Charge offs	0	0	0	0	0
Recoveries	0	0	0	0	0
Provision for loan losses	0	7	(11)	0	(2)
Ending balance	23	36	23	36	34
Ending balance specifically evaluated for impairment	0	0	0	0	0
Ending balance collectively evaluated for impairment	23	36	23	36	34
Total	14,118	18,166	14,118	18,166	17,743
Ending balance specifically evaluated for impairment	0	0	0	0	0
Ending balance collectively evaluated for impairment	14,118	18,166	14,118	18,166	17,743
Residential | Term
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,106	1,138	1,235	1,130	1,130
Charge offs	0	116	93	212	213
Recoveries	4	3	10	45	64
Provision for loan losses	27	67	(15)	129	254
Ending balance	1,137	1,092	1,137	1,092	1,235
Ending balance specifically evaluated for impairment	337	238	337	238	335
Ending balance collectively evaluated for impairment	800	854	800	854	900
Total	485,490	459,449	485,490	459,449	469,145
Ending balance specifically evaluated for impairment	13,446	10,928	13,446	10,928	10,904
Ending balance collectively evaluated for impairment	472,044	448,521	472,044	448,521	458,241
Home equity line of credit
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	633	678	730	692	692
Charge offs	0	6	38	121	121
Recoveries	1	0	3	13	24
Provision for loan losses	190	47	129	135	135
Ending balance	824	719	824	719	730
Ending balance specifically evaluated for impairment	184	7	184	7	17
Ending balance collectively evaluated for impairment	640	712	640	712	713
Total	94,144	105,213	94,144	105,213	98,469
Ending balance specifically evaluated for impairment	1,398	1,168	1,398	1,168	1,092
Ending balance collectively evaluated for impairment	92,746	104,045	92,746	104,045	97,377
Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	649	575	630	545	545
Charge offs	48	50	235	195	348
Recoveries	31	22	102	73	96
Provision for loan losses	48	193	183	317	337
Ending balance	680	740	680	740	630
Ending balance specifically evaluated for impairment	6	2	6	2	0
Ending balance collectively evaluated for impairment	674	738	674	738	630
Total	25,919	25,619	25,919	25,619	24,860
Ending balance specifically evaluated for impairment	6	2	6	2	15
Ending balance collectively evaluated for impairment	25,913	25,617	25,913	25,617	24,845
Unallocated
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,836	1,425	1,216	642	642
Charge offs	0	0	0	0	0
Recoveries	0	0	0	0	0
Provision for loan losses	(129)	253	491	1,036	574
Ending balance	1,707	1,678	1,707	1,678	1,216
Ending balance specifically evaluated for impairment	0	0	0	0	0
Ending balance collectively evaluated for impairment	1,707	1,678	1,707	1,678	1,216
Total	0	0	0	0	0
Ending balance specifically evaluated for impairment	0	0	0	0	0
Ending balance collectively evaluated for impairment	$ 0	$ 0	$ 0	$ 0	$ 0

Stock-Based Compensation - Narr

Stock-Based Compensation - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share based compensation cost	$ 1,785	$ 1,785
Compensation expense recognized		368	$ 285
Share-based compensation expense not yet recognized	$ 797	$ 797	$ 774
Plan 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Capital shares reserved for future issuance (in shares)				400,000
Plan 2010 | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants during the period (in shares)	162,892
Shares	75,254	75,254

Stock-Based Compensation - Shar

Stock-Based Compensation - Shares of Restricted Stock Granted under 2010 Plan (Details) - Plan 2010 - Restricted Stock - shares	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares	75,254
Remaining Term	1 year 7 months 6 days
2015 | Five Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term					5 years
Shares	12,023
Remaining Term					9 days
2016 | Five Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term				5 years
Shares	15,015
Remaining Term				1 year 3 months 18 days
2017 | Five Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term			5 years
Shares	9,972
Remaining Term			2 years 3 months 18 days
2017 | Three Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term			3 years
Shares	4,602
Remaining Term			12 days
2018 | Five Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term		5 years
Shares	9,655
Remaining Term		3 years 3 months 18 days
2018 | Three Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term		3 years
Shares	1,900
Remaining Term		1 year 4 months 24 days
2018 | Two Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term		2 years
Shares	932
Remaining Term		9 days
2018 | Four Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term		4 years
Shares	2,068
Remaining Term		2 years 3 months 18 days
2019 | Three Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term	3 years
Shares	16,254
Remaining Term	2 years 3 months 18 days
2019 | Two Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term	2 years
Shares	1,484
Remaining Term	1 year 3 months 18 days
2019 | One Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term	1 year
Shares	1,349
Remaining Term	9 days

Preferred and Common Stock (Det

Preferred and Common Stock (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Class of Stock [Line Items]
Proceeds from sale of common stock	$ 488	$ 466
Capital Purchase Program
Class of Stock [Line Items]
Proceeds from sale of common stock	$ 488	$ 466

Earnings Per Share - Schedule o

Earnings Per Share - Schedule of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income (Numerator) [Abstract]
Net income as reported	$ 6,288	$ 5,933	$ 18,839	$ 17,173
Basic EPS: Income available to common shareholders	6,288	5,933	18,839	17,173
Diluted EPS: Income available to common shareholders plus assumed conversions	$ 6,288	$ 5,933	$ 18,839	$ 17,173
Shares (Denominator) [Abstract]
Basic EPS: Income available to common shareholders (in shares)	10,818,423	10,785,528	10,811,233	10,780,277
Effect of dilutive securities: restricted stock (in shares)	75,493	69,515	75,013	69,515
Diluted EPS: Income available to common shareholders plus assumed conversions (in shares)	10,893,916	10,855,043	10,886,246	10,849,792
Per-Share Amount [Abstract]
Basic EPS: Income available to common shareholders (in dollars per share)	$ 0.58	$ 0.55	$ 1.74	$ 1.59
Diluted EPS: Income available to common shareholders plus assumed conversions (in dollars per share)	$ 0.58	$ 0.55	$ 1.73	$ 1.58

Employee Benefit Plans - Narrat

Employee Benefit Plans - Narrative (Details)	9 Months Ended
	Sep. 30, 2019USD ($)employeepost_retirement_benefit_plan	Sep. 30, 2018USD ($)	Dec. 31, 2018USD ($)
Retirement Benefits, Description [Abstract]
Requisite period of service	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			2.00%
Expense related to 401(k) plan	$ 464,000	$ 414,000
Unfunded, supplemental retirement benefits payable period	20 years
Pension expense	$ 121,000	129,000
Accrued pension liability	$ 2,831,000	$ 2,973,000	$ 2,949,000
Number of post retirement benefit plans (post retirement benefit plan) | post_retirement_benefit_plan	2
Number of employees currently eligible (employee) | employee	6
Requisite 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	4.25%
Assumed health care cost trend rate	7.00%
Expected future benefit payments, current year	$ 113,000
Estimated plan expense	66,000
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		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Change in benefit obligation
Benefit obligation at beginning of year			$ 1,599	$ 1,874
Interest cost	$ 17	$ 19	50	57
Benefits paid			(85)	(84)
Benefit obligation at end of period	1,564	1,847	1,564	1,847
Funded status
Benefit obligation at end of period	(1,564)	(1,847)	(1,599)	(1,874)	$ (1,564)	$ (1,847)
Unamortized (gain) loss					(47)	186
Accrued benefit cost at end of period					$ (1,611)	$ (1,661)
Components of net periodic benefit cost
Interest cost	17	19	50	57
Net periodic benefit cost	$ 17	$ 19	$ 50	$ 57

Employee Benefit Plans - Schedu

Employee Benefit Plans - Schedule of Net Periodic Benefit Cost Not Yet Recognized (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Retirement Benefits, Description [Abstract]
Unamortized net actuarial gain (loss)	$ 47	$ 47	$ (186)
Deferred tax benefit (expense)	(10)	(10)	39
Net unrecognized postretirement benefits included in accumulated other comprehensive income (loss)	$ 37	$ 37	$ (147)

Other Comprehensive Income (L_3

Other Comprehensive Income (Loss) - Summary of Available for Sale Securities Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			$ 191,542	$ 181,321
Other comprehensive income (loss)	$ 597	$ (1,677)	7,042	(5,514)
Ending balance	208,489	184,661	208,489	184,661
Accumulated Net Investment Gain (Loss) Attributable to Parent
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	2,750	(7,245)	(5,051)	(2,901)
Unrealized gains (losses) arising during the period	1,199	(2,390)	11,074	(7,753)
Reclassification of net realized gains during the period	(15)	(1)	(15)	(137)
Related deferred taxes	(248)	503	(2,322)	1,658
Other comprehensive income (loss)	936	(1,888)	8,737	(6,232)
Ending balance	$ 3,686	$ (9,133)	$ 3,686	$ (9,133)

Other Comprehensive Income (L_4

Other Comprehensive Income (Loss) - Reclassification of Available-for-Sale Securities to Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Reclassification of Available-for-Sale Securities to Held-to-maturity Roll Forward [Roll Forward]
Beginning balance			$ 191,542	$ 181,321
Other comprehensive income (loss)	$ 597	$ (1,677)	7,042	(5,514)
Ending balance	208,489	184,661	208,489	184,661
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]
Beginning balance	(190)	(189)	(197)	(174)
Amortization of net unrealized gains (losses)	1	(6)	10	(25)
Related deferred taxes	0	1	(2)	5
Other comprehensive income (loss)	1	(5)	8	(20)
Ending balance	$ (189)	$ (194)	$ (189)	$ (194)

Other Comprehensive Income (L_5

Other Comprehensive Income (Loss) - Derivative Instruments Included in Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			$ 191,542	$ 181,321
Other comprehensive income (loss)	$ 597	$ (1,677)	7,042	(5,514)
Ending balance	208,489	184,661	208,489	184,661
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	75	2,066	1,438	1,544
Unrealized gains (losses) arising during the period	(430)	273	(2,156)	934
Related deferred taxes	90	(57)	453	(196)
Other comprehensive income (loss)	(340)	216	(1,703)	738
Ending balance	$ (265)	$ 2,282	$ (265)	$ 2,282

Other Comprehensive Income (L_6

Other Comprehensive Income (Loss) - Reclassification out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance			$ 191,542	$ 181,321
Ending balance	$ 208,489	$ 184,661	208,489	184,661
Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	37	(147)	37	(147)
Amortization of unrecognized transition obligation	0	0	0	0
Change in unamortized net actuarial gain (loss)	0	0	0	0
Related deferred taxes	0	0	0	0
Ending balance	$ 37	$ (147)	$ 37	$ (147)

Financial Derivative Instrume_3

Financial Derivative Instruments (Details)	Sep. 30, 2019USD ($)derivative	Dec. 31, 2018USD ($)derivative
Derivative [Line Items]
Number of derivative instruments | derivative	1
Not Designated as Hedging Instrument | Customer loan interest swap agreements
Derivative [Line Items]
Fair Value	$ 0	$ 0
Number of derivative instruments | derivative	2	0
Derivative notional amount	$ 25,828,000	$ 0
Other Liabilities | Not Designated as Hedging Instrument | Customer loan interest swap agreements
Derivative [Line Items]
Fair Value	$ (1,643,000)	$ 0
Number of derivative instruments | derivative	1	0
Derivative notional amount	$ 12,914,000	$ 0
Other Assets | Not Designated as Hedging Instrument | Customer loan interest swap agreements
Derivative [Line Items]
Fair Value	$ 1,643,000	$ 0
Number of derivative instruments | derivative	1	0
Derivative notional amount	$ 12,914,000	$ 0
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
Fair Value	$ 214,000	763,000
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
Fair Value	$ 296,000	1,110,000
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap December 5 2019
Derivative [Line Items]
Fixed Rate Paid	2.466%
Notional Amount	$ 25,000,000	25,000,000
Fair Value	$ (23,000)	16,000
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap June 5 2020
Derivative [Line Items]
Fixed Rate Paid	2.547%
Notional Amount	$ 25,000,000	25,000,000
Fair Value	$ (140,000)	(9,000)
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap December 5 2020
Derivative [Line Items]
Fixed Rate Paid	2.603%
Notional Amount	$ 25,000,000	25,000,000
Fair Value	$ (300,000)	(60,000)
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap December 5 2022
Derivative [Line Items]
Fixed Rate Paid	1.779%
Notional Amount	$ 25,000,000	0
Fair Value	$ (217,000)	0
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	0
Fair Value	$ (133,000)	0
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	0
Fair Value	(32,000)	0
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap
Derivative [Line Items]
Notional Amount	175,000,000	125,000,000
Fair Value	(335,000)	$ 1,820,000
Cash Flow Hedging | Not Designated as Hedging Instrument | Customer loan interest swap agreements
Derivative [Line Items]
Collateral posted	$ 3,050,000

Mortgage Servicing Rights - Nar

Mortgage Servicing Rights - Narrative (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Transfers and Servicing [Abstract]
Moving average of weekly prepayment assumption	3 years
Prepayment speed (as a percentage)	12.24%
Discount rate adjustment rate (as a percentage)	9.50%
Servicing rights capitalized	$ 267	$ 184
Servicing rights amortized	170	152
Mortgage servicing rights	2,083	2,572	$ 2,586
Residential mortgage loans serviced for others, principal	$ 261,685	$ 257,584	$ 261,654

Mortgage Servicing Rights - Sch

Mortgage Servicing Rights - Schedule of Mortgage Servicing Rights (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Transfers and Servicing [Abstract]
Mortgage servicing rights	$ 5,985	$ 5,718	$ 5,611
Accumulated amortization	(4,534)	(4,364)	(4,312)
Total servicing asset at fair value	$ 1,451	$ 1,354	$ 1,299

Certificates of Deposit (Detail

Certificates of Deposit (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Banking and Thrift [Abstract]
Certificates of deposit of less than $100,000	$ 319,292	$ 372,464	$ 389,317
Certificates $100,000 to $250,000	278,050	162,185	168,402
Certificates $250,000 and over	64,431	56,760	61,690
Total certificates of deposit	$ 661,773	$ 591,409	$ 619,409

Fair Value - Assets and Liabili

Fair Value - Assets and Liabilities Recorded at Fair Value on a Recurring Basis (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	$ 326,798,000	$ 317,416,000	$ 302,187,000
U.S. Government-sponsored agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		5,007,000	4,979,000
Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	322,190,000	307,693,000	292,570,000
State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	4,608,000	4,716,000	4,638,000
Fair Value, Measurements, Recurring | U.S. Government-sponsored agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale			4,979,000
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 asset	0
Total assets	0	0	0
Derivative liabilities	0	0
Fair Value, Measurements, Recurring | Level 1 | Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	0	0	0
Derivative liabilities	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 asset	0
Derivative liabilities	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
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 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	326,798,000	317,416,000	302,187,000
Derivative asset	2,153,000
Total assets	328,951,000	319,305,000	305,075,000
Derivative liabilities	2,488,000	69,000
Fair Value, Measurements, Recurring | Level 2 | Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	510,000	1,889,000	2,888,000
Derivative liabilities	845,000	69,000
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 asset	1,643,000
Derivative liabilities	1,643,000
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		5,007,000
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	322,190,000	307,693,000	292,570,000
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	4,608,000	4,716,000	4,638,000
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 asset	0
Total assets	0	0	0
Derivative liabilities	0	0
Fair Value, Measurements, Recurring | Level 3 | Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	0	0	0
Derivative liabilities	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 asset	0
Derivative liabilities	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
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 | Total Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	326,798,000	317,416,000	302,187,000
Derivative asset	2,153,000
Total assets	328,951,000	319,305,000	305,075,000
Derivative liabilities	2,488,000	69,000
Fair Value, Measurements, Recurring | Total Fair Value | Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	510,000	1,889,000	2,888,000
Derivative liabilities	845,000	69,000
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 asset	1,643,000
Derivative liabilities	1,643,000
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		5,007,000
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	322,190,000	307,693,000	292,570,000
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	$ 4,608,000	$ 4,716,000	$ 4,638,000

Fair Value - Additional Informa

Fair Value - Additional Information (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Valuation allowance on real estate owned	$ 0	$ 0	$ 0
Valuation allowance on impaired financing receivable	$ 1,763,000	$ 2,096,000	$ 2,109,000

Fair Value - Assets Recorded at

Fair Value - Assets Recorded at Fair Value on a Non-Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned	$ 279	$ 584	$ 584
Fair Value, Measurements, Nonrecurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
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]
Other real estate owned	279	584	584
Impaired loans	7,143	7,415	7,024
Total assets	7,422	7,999	7,608
Fair Value, Measurements, Nonrecurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
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]
Other real estate owned	279	584	584
Impaired loans	7,143	7,415	7,024
Total assets	$ 7,422	$ 7,999	$ 7,608

Fair Value - Assets and Liabi_2

Fair Value - Assets and Liabilities at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities to be held to maturity, carrying value	$ 298,786	$ 255,663	$ 257,395
Securities to be held to maturity	306,647	250,900	249,890
Mortgage servicing rights	2,083	2,586	2,572
Total deposits	1,623,290	1,527,085	1,514,911
Carrying value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities to be held to maturity, carrying value	298,786	255,663	257,395
Loans	1,251,694	1,227,051	1,231,876
Mortgage servicing rights, carrying value	1,451	1,354	1,299
Local certificates of deposit	283,119	284,482	252,440
National certificates of deposit	378,654	306,927	366,969
Total deposits	661,773	591,409	619,409
Repurchase agreements	41,310	40,205	95,160
Federal Home Loan Bank advances	140,107	170,112	170,114
Total borrowed funds	181,417	210,317	265,274
Carrying value | Commercial | Real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	363,725	349,243	362,199
Carrying value | Commercial | Construction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	36,829	27,018	23,639
Carrying value | Commercial | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	198,093	192,420	183,935
Carrying value | Municipal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	36,492	51,101	56,677
Carrying value | Residential | Construction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	14,091	17,705	18,124
Carrying value | Residential | Term
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	484,160	467,760	458,174
Carrying value | Home equity line of credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	93,180	97,650	104,373
Carrying value | Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	25,124	24,154	24,755
Total Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities to be held to maturity	306,647	250,900	249,890
Loans	1,239,145	1,193,788	1,228,967
Mortgage servicing rights	2,083	2,586	2,572
Local certificates of deposit	285,598	281,282	253,014
National certificates of deposit	379,995	307,508	368,127
Total deposits	665,593	588,790	621,141
Repurchase agreements	40,004	40,161	90,311
Federal Home Loan Bank advances	140,008	169,240	170,058
Total borrowed funds	180,012	209,401	260,369
Total Fair Value | Commercial | Real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	360,061	340,526	359,421
Total Fair Value | Commercial | Construction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	36,458	26,344	23,458
Total Fair Value | Commercial | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	196,674	189,842	184,116
Total Fair Value | Municipal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	36,192	50,965	56,981
Total Fair Value | Residential | Construction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	14,032	17,083	18,095
Total Fair Value | Residential | Term
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	482,121	451,323	459,561
Total Fair Value | Home equity line of credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	90,289	95,175	103,209
Total Fair Value | Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	23,318	22,530	24,126
Total Fair Value | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities to be held to maturity	0	0	0
Loans	0	0	0
Mortgage servicing rights	0	0	0
Local certificates of deposit	0	0	0
National certificates of deposit	0	0	0
Total deposits	0	0	0
Repurchase agreements	0	0	0
Federal Home Loan Bank advances	0	0	0
Total borrowed funds	0	0	0
Total Fair Value | Level 1 | Commercial | Real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0	0
Total Fair Value | Level 1 | Commercial | Construction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0	0
Total Fair Value | Level 1 | Commercial | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0	0
Total Fair Value | Level 1 | Municipal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0	0
Total Fair Value | Level 1 | Residential | Construction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0	0
Total Fair Value | Level 1 | Residential | Term
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0	0
Total Fair Value | Level 1 | Home equity line of credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0	0
Total Fair Value | Level 1 | Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0	0
Total Fair Value | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities to be held to maturity	306,647	250,900	249,890
Loans	7,143	7,415	7,024
Mortgage servicing rights	2,083	2,586	2,572
Local certificates of deposit	285,598	281,282	253,014
National certificates of deposit	379,995	307,508	368,127
Total deposits	665,593	588,790	621,141
Repurchase agreements	40,004	40,161	90,311
Federal Home Loan Bank advances	140,008	169,240	170,058
Total borrowed funds	180,012	209,401	260,369
Total Fair Value | Level 2 | Commercial | Real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	622	423	423
Total Fair Value | Level 2 | Commercial | Construction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0	0
Total Fair Value | Level 2 | Commercial | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	5,142	6,096	6,033
Total Fair Value | Level 2 | Municipal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0	0
Total Fair Value | Level 2 | Residential | Construction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0	0
Total Fair Value | Level 2 | Residential | Term
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	992	793	475
Total Fair Value | Level 2 | Home equity line of credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	387	103	93
Total Fair Value | Level 2 | Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0	0
Total Fair Value | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities to be held to maturity	0	0	0
Loans	1,232,002	1,186,373	1,221,943
Mortgage servicing rights	0	0	0
Local certificates of deposit	0	0	0
National certificates of deposit	0	0	0
Total deposits	0	0	0
Repurchase agreements	0	0	0
Federal Home Loan Bank advances	0	0	0
Total borrowed funds	0	0	0
Total Fair Value | Level 3 | Commercial | Real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	359,439	340,103	358,998
Total Fair Value | Level 3 | Commercial | Construction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	36,458	26,344	23,458
Total Fair Value | Level 3 | Commercial | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	191,532	183,746	178,083
Total Fair Value | Level 3 | Municipal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	36,192	50,965	56,981
Total Fair Value | Level 3 | Residential | Construction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	14,032	17,083	18,095
Total Fair Value | Level 3 | Residential | Term
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	481,129	450,530	459,086
Total Fair Value | Level 3 | Home equity line of credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	89,902	95,072	103,116
Total Fair Value | Level 3 | Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	$ 23,318	$ 22,530	$ 24,126

Impact of Recently Issued Acc_2

Impact of Recently Issued Accounting Standards (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)
Retained earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification adjustment for effect of enacted tax law changes	$ 297