The First Bancorp, Inc. (FNLC) 10-Q 9 Nov 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Nov. 01, 2017
Document and Entity Information [Abstract]
Entity Registrant Name	First Bancorp, Inc /ME/
Entity Central Index Key	765,207
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		10,827,467
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Assets
Cash and cash equivalents	$ 22,375	$ 17,366	$ 23,456
Interest bearing deposits in other banks	584	293	15,098
Securities available for sale	298,999	300,416	282,293
Securities to be held to maturity (fair value of $245,021,000 at September 30, 2017, $225,537,000 at December 31, 2016 and $195,797,000 at September 30, 2016)	242,679	226,828	188,770
Restricted equity securities, at cost	10,798	11,930	14,048
Loans held for sale	434	782	1,228
Loans	1,121,086	1,071,526	1,028,992
Less allowance for loan losses	11,012	10,138	10,298
Net loans	1,110,074	1,061,388	1,018,694
Accrued interest receivable	5,820	5,532	5,079
Premises and equipment, net	21,731	22,202	21,779
Other real estate owned	320	375	855
Goodwill	29,805	29,805	29,805
Other assets	38,082	35,958	33,983
Total assets	1,781,701	1,712,875	1,635,088
Liabilities
Demand deposits	193,089	140,482	158,476
NOW deposits	291,403	282,971	295,708
Money market deposits	134,257	125,544	76,685
Savings deposits	234,456	217,340	218,425
Certificates of deposit	496,844	476,620	424,455
Total deposits	1,350,049	1,242,957	1,173,749
Borrowed funds – short term	119,207	158,774	137,970
Borrowed funds – long term	115,121	120,127	130,128
Other liabilities	17,442	18,496	17,247
Total liabilities	1,601,819	1,540,354	1,459,094
Shareholders' equity
Common stock, one cent par value per share	108	108	108
Additional paid-in capital	61,446	60,723	60,500
Retained earnings	118,360	111,693	112,900
Accumulated other comprehensive income (loss)
Net unrealized gain (loss) on securities available-for-sale	(825)	(935)	2,708
Net unrealized loss on securities transferred from available for sale to held to maturity	(140)	(129)	(124)
Net unrealized gain on cash flow hedging derivative instruments	1,035	1,163	58
Net unrealized loss on postretirement benefit costs	(102)	(102)	(156)
Total shareholders' equity	179,882	172,521	175,994
Total liabilities & shareholders' equity	$ 1,781,701	$ 1,712,875	$ 1,635,088
Common Stock
Number of shares authorized (in shares)	18,000,000	18,000,000	18,000,000
Number of shares outstanding (in shares)	10,824,724	10,793,946	10,788,329
Book value per common share (usd per share)	$ 16.62	$ 15.98	$ 16.31
Tangible book value per common share (usd per share)	$ 13.84	$ 13.20	$ 13.53

Consolidated Balance Sheets (U3

Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Assets
Securities to be held to maturity, fair value	$ 245,021	$ 225,537	$ 195,797
Common stock, par value per share	$ 0.01	$ 0.01	$ 0.01

Consolidated Statements of Inco

Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Interest income
Interest and fees on loans (includes tax-exempt income of $589,000 as of September 30, 2017 and $487,000 as of September 30, 2016)	$ 11,648	$ 10,021	$ 33,415	$ 29,759
Interest on deposits with other banks	23	9	46	17
Interest and dividends on investments (includes tax-exempt income of $4,890,000 in 2017 and $3,761,000 in 2016)	3,846	3,253	11,549	10,383
Total interest income	15,517	13,283	45,010	40,159
Interest expense
Interest on deposits	2,473	1,538	6,769	4,382
Interest on borrowed funds	1,090	1,216	3,146	3,568
Total interest expense	3,563	2,754	9,915	7,950
Net interest income	11,954	10,529	35,095	32,209
Provision for loan losses	750	375	1,750	1,125
Net interest income after provision for loan losses	11,204	10,154	33,345	31,084
Non-interest income
Investment management and fiduciary income	655	591	1,995	1,805
Service charges on deposit accounts	511	528	1,562	1,711
Net securities gains	468	137	471	668
Mortgage origination and servicing income, net of amortization	499	896	1,260	1,534
Other operating income	1,360	1,317	4,050	3,721
Total non-interest income	3,493	3,469	9,338	9,439
Non-interest expense
Salaries and employee benefits	4,267	3,931	12,110	11,136
Occupancy expense	589	589	1,816	1,735
Furniture and equipment expense	942	819	2,702	2,416
FDIC insurance premiums	259	210	762	631
Amortization of identified intangibles	10	10	32	32
Other operating expense	1,946	1,846	5,929	5,900
Total non-interest expense	8,013	7,405	23,351	21,850
Income before income taxes	6,684	6,218	19,332	18,673
Income tax expense	1,702	1,656	4,830	4,984
NET INCOME	$ 4,982	$ 4,562	$ 14,502	$ 13,689
Basic earnings per common share (usd per share)	$ 0.46	$ 0.43	$ 1.35	$ 1.28
Diluted earnings per common share (usd per share)	$ 0.46	$ 0.42	$ 1.34	$ 1.27
Other comprehensive income (loss) net of tax
Net unrealized gain (loss) on securities available for sale	$ (240)	$ (1,292)	$ 110	$ 1,585
Net unrealized gain (loss) on securities transferred from available for sale to held to maturity, net of amortization	(3)	9	(11)	(12)
Net unrealized gain (loss) loss on cash flow hedging derivative instruments	(20)	193	(128)	58
Other comprehensive income (loss)	(263)	(1,090)	(29)	1,631
Comprehensive income	$ 4,719	$ 3,472	$ 14,473	$ 15,320

Consolidated Statements of Inc5

Consolidated Statements of Income and Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Interest and fees on loans (tax-exempt income)	$ 589	$ 487
Interest and dividends on investments (tax-exempt income)	$ 4,890	$ 3,761

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, 2015		10,753,855
Beginning balance at Dec. 31, 2015	$ 167,498	$ 59,970	$ 106,673	$ 855
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	13,689		13,689
Net unrealized gain on securities available for sale, net of tax	1,585			1,585
Net unrealized loss on cash flow hedging derivative instruments	58			58
Net unrealized loss on securities transferred from available for sale to held to maturity, net of tax	(12)			(12)
Comprehensive income	15,320		13,689	1,631
Cash dividends declared	(7,333)		(7,333)
Equity compensation expense	215	$ 215
Payment to repurchase of common stock (in shares)		(7,053)
Payment to repurchase common stock	(129)		(129)
Tax benefit from vesting of restricted stock	32	$ 32
Issuance of restricted stock (in shares)		21,847
Proceeds from sale of common stock (in shares)		19,680
Proceeds from sale of common stock	$ 391	$ 391
Ending balance (in shares) at Sep. 30, 2016	10,788,329	10,788,329
Ending balance at Sep. 30, 2016	$ 175,994	$ 60,608	112,900	2,486
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,562
Net unrealized gain on securities available for sale, net of tax	(1,292)
Net unrealized loss on securities transferred from available for sale to held to maturity, net of tax	$ 9
Ending balance (in shares) at Sep. 30, 2016	10,788,329	10,788,329
Ending balance at Sep. 30, 2016	$ 175,994	$ 60,608	112,900	2,486
Beginning balance (in shares) at Dec. 31, 2016	10,793,946	10,793,946
Beginning balance at Dec. 31, 2016	$ 172,521	$ 60,831	111,693	(3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	14,502		14,502
Net unrealized gain on securities available for sale, net of tax	110			110
Net unrealized loss on cash flow hedging derivative instruments	(128)			(128)
Net unrealized loss on securities transferred from available for sale to held to maturity, net of tax	(11)			(11)
Comprehensive income	14,473		14,502	(29)
Cash dividends declared	(7,682)		(7,682)
Equity compensation expense	247	$ 247
Payment to repurchase of common stock (in shares)		(5,560)
Payment to repurchase common stock	(153)		(153)
Issuance of restricted stock (in shares)		18,850
Proceeds from sale of common stock (in shares)		17,488
Proceeds from sale of common stock	$ 476	$ 476
Ending balance (in shares) at Sep. 30, 2017	10,824,724	10,824,724
Ending balance at Sep. 30, 2017	$ 179,882	$ 61,554	118,360	(32)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,982
Net unrealized gain on securities available for sale, net of tax	(240)
Net unrealized loss on securities transferred from available for sale to held to maturity, net of tax	$ (3)
Ending balance (in shares) at Sep. 30, 2017	10,824,724	10,824,724
Ending balance at Sep. 30, 2017	$ 179,882	$ 61,554	$ 118,360	$ (32)

Consolidated Statements of Cha7

Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Statement of Stockholders' Equity [Abstract]
Cash dividends declared (usd per share)	$ 0.71	$ 0.68

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities
Net income	$ 14,502	$ 13,689
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	1,378	1,302
Change in deferred taxes	98	(237)
Provision for loan losses	1,750	1,125
Loans originated for resale	(29,422)	(37,790)
Proceeds from sales and transfers of loans	30,323	37,765
Net gain on sales of loans	(553)	(854)
Net gain on sale or call of securities	(471)	(668)
Net amortization of premiums on investments	2,651	1,668
Net gain on sale of other real estate owned	(74)	(168)
Provision for losses on other real estate owned	17	89
Equity compensation expense	247	215
Tax benefit from vesting of restricted stock	0	32
Net increase in other assets and accrued interest	(2,677)	(2,115)
Net increase (decrease) in other liabilities	61	(159)
Net loss on disposal of premises and equipment	7	0
Amortization of investment in limited partnership	134	146
Net acquisition amortization	32	32
Net cash provided by operating activities	18,003	14,072
Cash flows from investing activities
Increase in interest-bearing deposits in other banks	(291)	(11,085)
Proceeds from sales of securities available for sale	15,587	10,305
Proceeds from maturities, payments and calls of securities available for sale	141,967	49,088
Proceeds from maturities, payments and calls of securities to be held to maturity	11,693	82,900
Proceeds from sales of other real estate owned	336	1,340
Purchases of securities available for sale	(158,330)	(117,307)
Purchases of securities to be held to maturity	(27,379)	(31,549)
Redemption of restricted equity securities	1,132	209
Net increase in loans	(50,660)	(41,681)
Capital expenditures	(914)	(1,265)
Net cash used by investing activities	(66,859)	(59,045)
Cash flows from financing activities
Net increase in demand, savings, and money market accounts	86,868	77,087
Net increase in certificates of deposit	20,224	53,473
Net decrease in short-term borrowings	(94,538)	(104,359)
Advances on long-term borrowings	50,000	35,000
Repayment on long-term borrowings	(35)	0
Payment to repurchase common stock	(153)	(129)
Proceeds from sale of common stock	476	391
Dividends paid	(8,977)	(7,333)
Net cash provided by financing activities	53,865	54,130
Net increase in cash and cash equivalents	5,009	9,157
Cash and cash equivalents at beginning of period	17,366	14,299
Cash and cash equivalents at end of period	22,375	23,456
Interest paid	9,789	7,877
Income taxes paid	3,950	4,682
Non-cash transactions
Net transfer from loans to other real estate owned	$ 224	$ 584

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2017
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 normal 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 2017 period is not necessarily indicative of the results that may be expected for the year ending December 31, 2017 . 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, 2016 . Subsequent Events Events occurring subsequent to September 30, 2017 , have been evaluated as to their potential impact to the financial statements.

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2017
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, 2017 : Amortized Cost Unrealized Gains Unrealized Losses Fair Value (Estimated) Securities available for sale Mortgage-backed securities $ 290,151,000 $ 1,339,000 $ (2,701,000 ) $ 288,789,000 State and political subdivisions 6,860,000 28,000 (46,000 ) 6,842,000 Other equity securities 3,257,000 113,000 (2,000 ) 3,368,000 $ 300,268,000 $ 1,480,000 $ (2,749,000 ) $ 298,999,000 Securities to be held to maturity U.S. Government-sponsored agencies $ 11,154,000 $ — $ (197,000 ) $ 10,957,000 Mortgage-backed securities 24,993,000 731,000 (40,000 ) 25,684,000 State and political subdivisions 202,232,000 3,640,000 (1,792,000 ) 204,080,000 Corporate securities 4,300,000 — — 4,300,000 $ 242,679,000 $ 4,371,000 $ (2,029,000 ) $ 245,021,000 Restricted equity securities Federal Home Loan Bank Stock $ 9,761,000 $ — $ — $ 9,761,000 Federal Reserve Bank Stock 1,037,000 — — 1,037,000 $ 10,798,000 $ — $ — $ 10,798,000 The following table summarizes the amortized cost and estimated fair value of investment securities at December 31, 2016 : Amortized Cost Unrealized Gains Unrealized Losses Fair Value (Estimated) Securities available for sale Mortgage-backed securities $ 282,397,000 $ 1,334,000 $ (3,127,000 ) $ 280,604,000 State and political subdivisions 16,183,000 475,000 (176,000 ) 16,482,000 Other equity securities 3,274,000 63,000 (7,000 ) 3,330,000 $ 301,854,000 $ 1,872,000 $ (3,310,000 ) $ 300,416,000 Securities to be held to maturity U.S. Government-sponsored agencies $ 11,943,000 $ 35,000 $ (233,000 ) $ 11,745,000 Mortgage-backed securities 31,201,000 967,000 (147,000 ) 32,021,000 State and political subdivisions 179,384,000 1,971,000 (3,884,000 ) 177,471,000 Corporate securities 4,300,000 — — 4,300,000 $ 226,828,000 $ 2,973,000 $ (4,264,000 ) $ 225,537,000 Restricted equity securities Federal Home Loan Bank Stock $ 10,893,000 $ — $ — $ 10,893,000 Federal Reserve Bank Stock 1,037,000 — — 1,037,000 $ 11,930,000 $ — $ — $ 11,930,000 The following table summarizes the amortized cost and estimated fair value of investment securities at September 30, 2016 : Amortized Cost Unrealized Gains Unrealized Losses Fair Value (Estimated) Securities available for sale Mortgage-backed securities $ 258,179,000 $ 3,848,000 $ (513,000 ) $ 261,514,000 State and political subdivisions 16,689,000 795,000 — 17,484,000 Other equity securities 3,258,000 55,000 (18,000 ) 3,295,000 $ 278,126,000 $ 4,698,000 $ (531,000 ) $ 282,293,000 Securities to be held to maturity U.S. Government-sponsored agencies $ 891,000 $ 15,000 $ — $ 906,000 Mortgage-backed securities 34,186,000 1,386,000 (34,000 ) 35,538,000 State and political subdivisions 149,393,000 5,830,000 (170,000 ) 155,053,000 Corporate securities 4,300,000 — — 4,300,000 $ 188,770,000 $ 7,231,000 $ (204,000 ) $ 195,797,000 Restricted equity securities Federal Home Loan Bank Stock $ 13,011,000 $ — $ — $ 13,011,000 Federal Reserve Bank Stock 1,037,000 — — 1,037,000 $ 14,048,000 $ — $ — $ 14,048,000 The following table summarizes the contractual maturities of investment securities at September 30, 2017 : 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 $ 176,000 $ 179,000 $ 552,000 $ 559,000 Due in 1 to 5 years 856,000 859,000 17,241,000 17,485,000 Due in 5 to 10 years 33,550,000 33,987,000 37,218,000 37,963,000 Due after 10 years 262,429,000 260,606,000 187,668,000 189,014,000 Equity securities 3,257,000 3,368,000 — — $ 300,268,000 $ 298,999,000 $ 242,679,000 $ 245,021,000 The following table summarizes the contractual maturities of investment securities at December 31, 2016 : 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 $ 253,000 $ 253,000 $ 906,000 $ 913,000 Due in 1 to 5 years 2,251,000 2,298,000 13,451,000 13,714,000 Due in 5 to 10 years 21,043,000 21,505,000 41,588,000 42,448,000 Due after 10 years 275,033,000 273,030,000 170,883,000 168,462,000 Equity securities 3,274,000 3,330,000 — — $ 301,854,000 $ 300,416,000 $ 226,828,000 $ 225,537,000 The following table summarizes the contractual maturities of investment securities at September 30, 2016 : 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 $ 973,000 $ 974,000 $ 1,772,000 $ 1,783,000 Due in 1 to 5 years 3,020,000 3,106,000 13,428,000 13,782,000 Due in 5 to 10 years 22,843,000 23,503,000 39,832,000 41,423,000 Due after 10 years 248,032,000 251,415,000 133,738,000 138,809,000 Equity securities 3,258,000 3,295,000 — — $ 278,126,000 $ 282,293,000 $ 188,770,000 $ 195,797,000 At September 30, 2017 , securities with a fair value of $233,733,000 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 $222,328,000 as of December 31, 2016 and $249,162,000 at September 30, 2016 , pledged for the same purposes. Gains and losses on the sale of securities available for sale 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, 2017 and 2016 : For the nine months ended September 30, For the quarter ended September 30, 2017 2016 2017 2016 Proceeds from sales of securities $ 15,587,000 $ 10,305,000 $ 15,584,000 $ 1,351,000 Gross realized gains 471,000 668,000 468,000 137,000 Gross realized losses — — — — Net gain $ 471,000 $ 668,000 $ 468,000 $ 137,000 Related income taxes $ 165,000 $ 234,000 $ 164,000 $ 48,000 Management reviews securities with unrealized losses for other than temporary impairment. As of September 30, 2017 , there were 229 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 61 had been temporarily impaired for 12 months or more. At September 30, 2017 , there were no material changes in the credit quality of these securities resulting in other than temporary impairment, and in Management's opinion, no additional write-down for other-than-temporary impairment is warranted. Information regarding securities temporarily impaired as of September 30, 2017 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 $ 7,958,000 $ (197,000 ) $ — $ — $ 7,958,000 $ (197,000 ) Mortgage-backed securities 147,326,000 (1,635,000 ) 48,015,000 (1,106,000 ) 195,341,000 (2,741,000 ) State and political subdivisions 39,407,000 (1,186,000 ) 12,583,000 (652,000 ) 51,990,000 (1,838,000 ) Other equity securities — — 10,000 (2,000 ) 10,000 (2,000 ) $ 194,691,000 $ (3,018,000 ) $ 60,608,000 $ (1,760,000 ) $ 255,299,000 $ (4,778,000 ) As of December 31, 2016 , there were 299 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 15 had been temporarily impaired for 12 months or more. Information regarding securities temporarily impaired as of December 31, 2016 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 $ 6,642,000 $ (233,000 ) $ — $ — $ 6,642,000 $ (233,000 ) Mortgage-backed securities 197,528,000 (3,090,000 ) 2,905,000 (184,000 ) 200,433,000 (3,274,000 ) State and political subdivisions 72,348,000 (4,060,000 ) — — 72,348,000 (4,060,000 ) Other equity securities — — 128,000 (7,000 ) 128,000 (7,000 ) $ 276,518,000 $ (7,383,000 ) $ 3,033,000 $ (191,000 ) $ 279,551,000 $ (7,574,000 ) As of September 30, 2016 , there were 71 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 13 had been temporarily impaired for 12 months or more. Information regarding securities temporarily impaired as of September 30, 2016 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 $ 79,118,000 $ (468,000 ) $ 2,407,000 $ (79,000 ) $ 81,525,000 (547,000 ) State and political subdivisions 13,666,000 (170,000 ) — — 13,666,000 (170,000 ) Other equity securities 10,000 (2,000 ) 107,000 (16,000 ) 117,000 (18,000 ) $ 92,794,000 $ (640,000 ) $ 2,514,000 $ (95,000 ) $ 95,308,000 $ (735,000 ) 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 $140,000 at September 30, 2017 . 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 much of its wholesale funding needs. As of September 30, 2017 and 2016 , and December 31, 2016 , the Bank's investment in FHLB stock totaled $9,761,000 , $13,011,000 and $10,893,000 , 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, 2017 . The Bank will continue to monitor its investment in FHLB stock.

Loans

Loans	9 Months Ended
	Sep. 30, 2017
Loans and Leases Receivable Disclosure [Abstract]
Loans	Loans The following table shows the composition of the Company's loan portfolio as of September 30, 2017 and 2016 and at December 31, 2016 : September 30, 2017 December 31, 2016 September 30, 2016 Commercial Real estate $ 301,227,000 26.9 % $ 302,506,000 28.2 % $ 297,808,000 28.9 % Construction 32,893,000 2.9 % 25,406,000 2.4 % 18,828,000 1.8 % Other 172,986,000 15.4 % 150,769,000 14.1 % 131,198,000 12.8 % Municipal 33,311,000 3.0 % 27,056,000 2.5 % 26,153,000 2.5 % Residential Term 429,572,000 38.3 % 411,469,000 38.4 % 403,159,000 39.2 % Construction 15,495,000 1.4 % 18,303,000 1.7 % 14,269,000 1.4 % Home equity line of credit 110,178,000 9.8 % 110,907,000 10.4 % 111,994,000 10.9 % Consumer 25,424,000 2.3 % 25,110,000 2.3 % 25,583,000 2.5 % Total $ 1,121,086,000 100.0 % $ 1,071,526,000 100.0 % $ 1,028,992,000 100.0 % Loan balances include net deferred loan costs of $5,560,000 as of September 30, 2017 , $4,921,000 as of December 31, 2016 , and $4,648,000 as of September 30, 2016 . Pursuant to collateral agreements, qualifying first mortgage loans, which totaled $245,000,000 at September 30, 2017 , $257,122,000 at December 31, 2016 , and $262,001,000 at September 30, 2016 , were used to collateralize borrowings from the FHLB. In addition, commercial, construction and home equity loans totaling $297,712,000 at September 30, 2017 , $261,463,000 at December 31, 2016 , and $261,416,000 at September 30, 2016 , 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, 2017 , 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 $ 415,000 $ 169,000 $ 1,387,000 $ 1,971,000 $ 299,256,000 $ 301,227,000 $ — Construction — — — — 32,893,000 32,893,000 — Other 345,000 265,000 567,000 1,177,000 171,809,000 172,986,000 — Municipal — — — — 33,311,000 33,311,000 — Residential Term 295,000 3,668,000 1,941,000 5,904,000 423,668,000 429,572,000 344,000 Construction — — — — 15,495,000 15,495,000 — Home equity line of credit 645,000 130,000 986,000 1,761,000 108,417,000 110,178,000 167,000 Consumer 195,000 6,000 18,000 219,000 25,205,000 25,424,000 — Total $ 1,895,000 $ 4,238,000 $ 4,899,000 $ 11,032,000 $ 1,110,054,000 $ 1,121,086,000 $ 511,000 Information on the past-due status of loans by class of financing receivable as of December 31, 2016 , 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 $ 1,039,000 $ 22,000 $ 2,415,000 $ 3,476,000 $ 299,030,000 $ 302,506,000 $ 753,000 Construction — — — — 25,406,000 25,406,000 — Other 202,000 33,000 796,000 1,031,000 149,738,000 150,769,000 20,000 Municipal — — — — 27,056,000 27,056,000 — Residential Term 631,000 3,970,000 1,802,000 6,403,000 405,066,000 411,469,000 — Construction — — — — 18,303,000 18,303,000 — Home equity line of credit 704,000 157,000 703,000 1,564,000 109,343,000 110,907,000 — Consumer 135,000 45,000 4,000 184,000 24,926,000 25,110,000 4,000 Total $ 2,711,000 $ 4,227,000 $ 5,720,000 $ 12,658,000 $ 1,058,868,000 $ 1,071,526,000 $ 777,000 Information on the past-due status of loans by class of financing receivable as of September 30, 2016 , 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 $ — $ 385,000 $ 1,101,000 $ 1,486,000 $ 296,322,000 $ 297,808,000 $ — Construction — — — — 18,828,000 18,828,000 — Other 573,000 18,000 53,000 644,000 130,554,000 131,198,000 — Municipal — — — — 26,153,000 26,153,000 — Residential Term 414,000 3,896,000 1,925,000 6,235,000 396,924,000 403,159,000 — Construction — — — — 14,269,000 14,269,000 — Home equity line of credit 310,000 49,000 708,000 1,067,000 110,927,000 111,994,000 — Consumer 124,000 124,000 62,000 310,000 25,273,000 25,583,000 7,000 Total $ 1,421,000 $ 4,472,000 $ 3,849,000 $ 9,742,000 $ 1,019,250,000 $ 1,028,992,000 $ 7,000 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, 2017 and 2016 and at December 31, 2016 is presented in the following table: September 30, 2017 December 31, 2016 September 30, 2016 Commercial Real estate $ 1,929,000 $ 1,907,000 $ 1,222,000 Construction — — — Other 9,520,000 964,000 412,000 Municipal — — — Residential Term 3,875,000 4,060,000 4,475,000 Construction — — — Home equity line of credit 1,001,000 843,000 851,000 Consumer 51,000 — 170,000 Total $ 16,376,000 $ 7,774,000 $ 7,130,000 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, 2017 is presented in the following table: For the nine months ended September 30, 2017 For the quarter ended September 30, 2017 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 $ 5,281,000 $ 5,634,000 $ — $ 5,418,000 $ 149,000 $ 5,398,000 $ 55,000 Construction — — — — — — — Other 2,862,000 2,955,000 — 1,631,000 37,000 1,879,000 12,000 Municipal — — — — — — — Residential Term 10,133,000 11,358,000 — 11,110,000 236,000 10,645,000 75,000 Construction — — — — — — — Home equity line of credit 1,495,000 1,807,000 — 1,417,000 18,000 1,479,000 4,000 Consumer 51,000 102,000 — 8,000 — 23,000 — $ 19,822,000 $ 21,856,000 $ — $ 19,584,000 $ 440,000 $ 19,424,000 $ 146,000 With an Allowance Recorded Commercial Real estate $ 4,555,000 $ 4,891,000 $ 347,000 $ 4,549,000 $ 125,000 $ 4,360,000 $ 40,000 Construction 763,000 763,000 108,000 763,000 28,000 763,000 10,000 Other 7,388,000 7,392,000 1,130,000 991,000 — 2,618,000 — Municipal — — — — — — — Residential Term 2,508,000 2,726,000 307,000 2,078,000 66,000 2,293,000 25,000 Construction — — — — — — — Home equity line of credit 24,000 27,000 24,000 25,000 — 25,000 — Consumer — — — — — — — $ 15,238,000 $ 15,799,000 $ 1,916,000 $ 8,406,000 $ 219,000 $ 10,059,000 $ 75,000 Total Commercial Real estate $ 9,836,000 $ 10,525,000 $ 347,000 $ 9,967,000 $ 274,000 $ 9,758,000 $ 95,000 Construction 763,000 763,000 108,000 763,000 28,000 763,000 10,000 Other 10,250,000 10,347,000 1,130,000 2,622,000 37,000 4,497,000 12,000 Municipal — — — — — — — Residential Term 12,641,000 14,084,000 307,000 13,188,000 302,000 12,938,000 100,000 Construction — — — — — — — Home equity line of credit 1,519,000 1,834,000 24,000 1,442,000 18,000 1,504,000 4,000 Consumer 51,000 102,000 — 8,000 — 23,000 — $ 35,060,000 $ 37,655,000 $ 1,916,000 $ 27,990,000 $ 659,000 $ 29,483,000 $ 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, 2016 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 $ 5,201,000 $ 5,614,000 $ — $ 6,252,000 $ 220,000 Construction — — — 32,000 — Other 1,671,000 1,852,000 — 1,074,000 86,000 Municipal — — — — — Residential Term 11,483,000 12,654,000 — 11,025,000 442,000 Construction — — — — — Home equity line of credit 1,361,000 1,733,000 — 1,213,000 33,000 Consumer — — — 9,000 — $ 19,716,000 $ 21,853,000 $ — $ 19,605,000 $ 781,000 With an Allowance Recorded Commercial Real estate $ 4,820,000 $ 4,925,000 $ 505,000 $ 4,153,000 $ 186,000 Construction 763,000 763,000 100,000 816,000 36,000 Other 72,000 72,000 39,000 317,000 — Municipal — — — — — Residential Term 2,186,000 2,328,000 304,000 3,209,000 101,000 Construction — — — — — Home equity line of credit 26,000 28,000 26,000 69,000 — Consumer — — — 48,000 — $ 7,867,000 $ 8,116,000 $ 974,000 $ 8,612,000 $ 323,000 Total Commercial Real estate $ 10,021,000 $ 10,539,000 $ 505,000 $ 10,405,000 $ 406,000 Construction 763,000 763,000 100,000 848,000 36,000 Other 1,743,000 1,924,000 39,000 1,391,000 86,000 Municipal — — — — — Residential Term 13,669,000 14,982,000 304,000 14,234,000 543,000 Construction — — — — — Home equity line of credit 1,387,000 1,761,000 26,000 1,282,000 33,000 Consumer — — — 57,000 — $ 27,583,000 $ 29,969,000 $ 974,000 $ 28,217,000 $ 1,104,000 A breakdown of impaired loans by class of financing receivable as of and for the period ended September 30, 2016 is presented in the following table: For the nine months ended September 30, 2016 For the quarter ended September 30, 2016 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 $ 5,530,000 $ 5,601,000 $ — $ 6,559,000 $ 186,000 $ 5,540,000 $ 41,000 Construction — — — 43,000 1,000 10,000 — Other 754,000 801,000 — 1,016,000 33,000 883,000 12,000 Municipal — — — — — — — Residential Term 11,675,000 12,830,000 — 10,830,000 340,000 11,183,000 131,000 Construction — — — — — — — Home equity line of credit 1,334,000 1,705,000 — 1,171,000 26,000 1,080,000 13,000 Consumer 55,000 96,000 — 6,000 3,000 18,000 3,000 $ 19,348,000 $ 21,033,000 $ — $ 19,625,000 $ 589,000 $ 18,714,000 $ 200,000 With an Allowance Recorded Commercial Real estate $ 4,912,000 $ 5,094,000 $ 381,000 $ 3,940,000 $ 130,000 $ 4,899,000 $ 59,000 Construction 788,000 788,000 99,000 834,000 27,000 788,000 9,000 Other 500,000 503,000 68,000 312,000 21,000 519,000 9,000 Municipal — — — — — — — Residential Term 2,456,000 2,667,000 318,000 3,529,000 79,000 2,929,000 13,000 Construction — — — — — — — Home equity line of credit 66,000 68,000 32,000 75,000 1,000 80,000 — Consumer 115,000 115,000 51,000 51,000 2,000 115,000 2,000 $ 8,837,000 $ 9,235,000 $ 949,000 $ 8,741,000 $ 260,000 $ 9,330,000 $ 92,000 Total Commercial Real estate $ 10,442,000 $ 10,695,000 $ 381,000 $ 10,499,000 $ 316,000 $ 10,439,000 $ 100,000 Construction 788,000 788,000 99,000 877,000 28,000 798,000 9,000 Other 1,254,000 1,304,000 68,000 1,328,000 54,000 1,402,000 21,000 Municipal — — — — — — — Residential Term 14,131,000 15,497,000 318,000 14,359,000 419,000 14,112,000 144,000 Construction — — — — — — — Home equity line of credit 1,400,000 1,773,000 32,000 1,246,000 27,000 1,160,000 13,000 Consumer 170,000 211,000 51,000 57,000 5,000 133,000 5,000 $ 28,185,000 $ 30,268,000 $ 949,000 $ 28,366,000 $ 849,000 $ 28,044,000 $ 292,000 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, 2017 , the Company had 67 loans with a balance of $19,760,000 that have been classified as TDRs. This compares to 71 loans with a balance of $21,526,000 and 75 loans with a balance of $22,025,000 classified as TDRs as of December 31, 2016 and September 30, 2016 , 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, 2017 : Number of Loans Balance Specific Reserves Commercial Real estate 9 $ 7,908,000 $ 65,000 Construction 1 763,000 108,000 Other 5 730,000 — Municipal — — — Residential Term 49 9,842,000 283,000 Construction — — — Home equity line of credit 3 517,000 — Consumer — — — 67 $ 19,760,000 $ 456,000 The following table shows TDRs by class and the specific reserve as of December 31, 2016 : Number of Loans Balance Specific Reserves Commercial Real estate 10 $ 8,937,000 $ 375,000 Construction 1 763,000 100,000 Other 5 779,000 — Municipal — — — Residential Term 52 10,503,000 261,000 Construction — — — Home equity line of credit 3 544,000 — Consumer — — — 71 $ 21,526,000 $ 736,000 The following table shows TDRs by class and the specific reserve as of September 30, 2016 : Number of Loans Balance Specific Reserves Commercial Real estate 11 $ 9,221,000 $ 116,000 Construction 1 788,000 99,000 Other 7 841,000 5,000 Municipal — — — Residential Term 53 10,626,000 272,000 Construction — — — Home equity line of credit 3 549,000 — Consumer — — — 75 $ 22,025,000 $ 492,000 As of September 30, 2017 , 14 of the loans classified as TDRs with a total balance of $1,849,000 were more than 30 days past due. None of these loans 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, 2017 : Number of Loans Balance Specific Reserves Commercial Real estate — $ — $ — Construction — — — Other 1 6,000 — Municipal — — — Residential Term 12 1,676,000 65,000 Construction — — — Home equity line of credit 1 167,000 — Consumer — — — 14 $ 1,849,000 $ 65,000 As of September 30, 2016 , eight of the loans classified as TDRs with a total balance of $1,060,000 were more than 30 days past due. Of these loans, none had been placed on TDR status in the previous 12 months. The following table shows these TDRs by class and the associated specific reserves included in the allowance for loan losses as of September 30, 2016 : Number of Loans Balance Specific Reserves Commercial Real estate — $ — $ — Construction — — — Other — — — Municipal — — — Residential Term 8 1,060,000 78,000 Construction — — — Home equity line of credit — — — Consumer — — — 8 $ 1,060,000 $ 78,000 For the nine months ended September 30, 2017 and 2016, no loans were placed on TDR status. As of September 30, 2017 , Management is aware of four loans classified as TDRs that are involved in bankruptcy with an outstanding balance of $826,000 . There were also eight loans with an outstanding balance of $1,075,000 that were classified as TDRs and on non-accrual status, of which one loan with an outstanding balance of $108,000 was in the process of foreclosure. Residential Mortgage Loans in Process of Foreclosure As of September 30, 2017 , there were 14 mortgage loans collateralized by residential real estate in the process of foreclosure with a total balance of $ 1,861,000 , none of which were placed in TDR status in the past 12 months. This compares to 13 mortgage loans collateralized by residential real estate in the process of foreclosure with a total balance of $1,508,000 as of September 30, 2016 .

Allowance for Loan Losses

Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2017
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 - The overall health of the economy, including unemployment rates and housing prices, has an impact on the credit quality of this segment. 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, 2017 , December 31, 2016 , and September 30, 2016 , by class of financing receivable and allowance element, is presented in the following tables: As of September 30, 2017 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 $ 347,000 $ 1,315,000 $ 2,342,000 $ — $ 4,004,000 Construction 108,000 142,000 253,000 — 503,000 Other 1,130,000 752,000 1,341,000 — 3,223,000 Municipal — — 20,000 — 20,000 Residential Term 307,000 300,000 550,000 — 1,157,000 Construction — 11,000 20,000 — 31,000 Home equity line of credit 24,000 297,000 366,000 — 687,000 Consumer — 247,000 288,000 — 535,000 Unallocated — — — 852,000 852,000 $ 1,916,000 $ 3,064,000 $ 5,180,000 $ 852,000 $ 11,012,000 As of December 31, 2016 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 $ 505,000 $ 1,471,000 $ 2,012,000 $ — $ 3,988,000 Construction 100,000 125,000 171,000 — 396,000 Other 39,000 735,000 1,006,000 — 1,780,000 Municipal — — 18,000 — 18,000 Residential Term 304,000 563,000 421,000 — 1,288,000 Construction — 25,000 19,000 — 44,000 Home equity line of credit 26,000 444,000 337,000 — 807,000 Consumer — 328,000 231,000 — 559,000 Unallocated — — — 1,258,000 1,258,000 $ 974,000 $ 3,691,000 $ 4,215,000 $ 1,258,000 $ 10,138,000 As of September 30, 2016 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 $ 381,000 $ 1,303,000 $ 2,355,000 $ — $ 4,039,000 Construction 99,000 81,000 147,000 — 327,000 Other 68,000 577,000 1,043,000 — 1,688,000 Municipal — — 18,000 — 18,000 Residential Term 318,000 571,000 470,000 — 1,359,000 Construction — 20,000 17,000 — 37,000 Home equity line of credit 32,000 457,000 385,000 — 874,000 Consumer 51,000 318,000 249,000 — 618,000 Unallocated — — — 1,338,000 1,338,000 $ 949,000 $ 3,327,000 $ 4,684,000 $ 1,338,000 $ 10,298,000 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. The qualitative portion of the allowance for loan losses was 0.46% of related loans as of September 30, 2017 and 0.39% as of December 31, 2016 . The qualitative portion increased $965,000 between December 31, 2016 and September 30, 2017 due to loan growth, slippage in certain economic factors, and an increase in nonaccrual loans. The unallocated component of the allowance totaled $852,000 at September 30, 2017 , or 7.7% of the total reserve. This compares to $1,258,000 or 12.4% as of December 31, 2016 . The change supported an increase in specific reserves attributable to deterioration in two loan relationships. The allowance for loan losses as a percent of total loans stood at 0.98% as of September 30, 2017 and 0.95% as of December 31, 2016. This compares to 1.00% as of September 30, 2016 . 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 state 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 30.4% of capital are below the regulatory guidance limit of 100.0% of capital at September 30, 2017 . Construction loans and non-owner-occupied commercial real estate loans are at 107.6% of total capital, below the regulatory limit of 300.0% of capital at September 30, 2017 . 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 50% of the outstanding loans and commitments are subject to review and validation annually by an independent consulting firm. Additionally, commercial loan relationships with exposure greater than or equal to $500,000 and lines of credit greater than $250,000 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, 2017 : Commercial Real Estate Commercial Construction Commercial Other Municipal Loans All Risk- Rated Loans 1 Strong $ — $ — $ 868,000 $ — $ 868,000 2 Above Average 13,051,000 43,000 7,501,000 32,560,000 53,155,000 3 Satisfactory 76,533,000 3,763,000 49,886,000 751,000 130,933,000 4 Average 146,424,000 18,685,000 79,410,000 — 244,519,000 5 Watch 44,773,000 10,402,000 18,190,000 — 73,365,000 6 OAEM 2,738,000 — 4,625,000 — 7,363,000 7 Substandard 17,585,000 — 12,506,000 — 30,091,000 8 Doubtful 123,000 — — — 123,000 Total $ 301,227,000 $ 32,893,000 $ 172,986,000 $ 33,311,000 $ 540,417,000 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, 2016 : Commercial Real Estate Commercial Construction Commercial Other Municipal Loans All Risk- Rated Loans 1 Strong $ 2,000 $ — $ 850,000 $ — $ 852,000 2 Above Average 13,981,000 49,000 8,934,000 25,527,000 48,491,000 3 Satisfactory 81,286,000 1,345,000 48,212,000 1,529,000 132,372,000 4 Average 139,421,000 16,506,000 65,146,000 — 221,073,000 5 Watch 43,181,000 7,349,000 16,864,000 — 67,394,000 6 OAEM 4,569,000 — 1,587,000 — 6,156,000 7 Substandard 20,066,000 157,000 9,176,000 — 29,399,000 8 Doubtful — — — — — Total $ 302,506,000 $ 25,406,000 $ 150,769,000 $ 27,056,000 $ 505,737,000 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, 2016 : Commercial Real Estate Commercial Construction Commercial Other Municipal Loans All Risk- Rated Loans 1 Strong $ 2,000 $ — $ 721,000 $ — $ 723,000 2 Above Average 24,225,000 53,000 9,546,000 24,592,000 58,416,000 3 Satisfactory 72,082,000 824,000 24,032,000 1,561,000 98,499,000 4 Average 133,835,000 12,764,000 67,811,000 — 214,410,000 5 Watch 41,120,000 5,187,000 24,189,000 — 70,496,000 6 OAEM 9,360,000 — 1,957,000 — 11,317,000 7 Substandard 17,184,000 — 2,942,000 — 20,126,000 8 Doubtful — — — — — Total $ 297,808,000 $ 18,828,000 $ 131,198,000 $ 26,153,000 $ 473,987,000 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, 2017 . The following table presents allowance for loan losses activity by class for the nine months and quarter ended September 30, 2017 , and allowance for loan loss balances by class and related loan balances by class as of September 30, 2017 : Commercial Municipal Residential Home Equity Line of Credit Consumer Unallocated Total Real Estate Construction Other Term Construction For the nine months ended September 30, 2017 Beginning balance $ 3,988,000 $ 396,000 $ 1,780,000 $ 18,000 $ 1,288,000 $ 44,000 $ 807,000 $ 559,000 $ 1,258,000 $ 10,138,000 Charge offs 305,000 — 58,000 — 351,000 — 28,000 276,000 — 1,018,000 Recoveries — — 25,000 — 29,000 — 4,000 84,000 — 142,000 Provision (credit) 321,000 107,000 1,476,000 2,000 191,000 (13,000 ) (96,000 ) 168,000 (406,000 ) 1,750,000 Ending balance $ 4,004,000 $ 503,000 $ 3,223,000 $ 20,000 $ 1,157,000 $ 31,000 $ 687,000 $ 535,000 $ 852,000 $ 11,012,000 For the three months ended September 30, 2017 Beginning balance $ 3,996,000 $ 517,000 $ 2,171,000 $ 19,000 $ 999,000 $ 26,000 $ 684,000 $ 529,000 $ 1,670,000 $ 10,611,000 Charge offs — — — — 281,000 — — 120,000 — 401,000 Recoveries — — 7,000 — 10,000 — 1,000 34,000 — 52,000 Provision (credit) 8,000 (14,000 ) 1,045,000 1,000 429,000 5,000 2,000 92,000 (818,000 ) 750,000 Ending balance $ 4,004,000 $ 503,000 $ 3,223,000 $ 20,000 $ 1,157,000 $ 31,000 $ 687,000 $ 535,000 $ 852,000 $ 11,012,000 Allowance for loan losses as of September 30, 2017 Ending balance specifically evaluated for impairment $ 347,000 $ 108,000 $ 1,130,000 $ — $ 307,000 $ — $ 24,000 $ — $ — $ 1,916,000 Ending balance collectively evaluated for impairment $ 3,657,000 $ 395,000 $ 2,093,000 $ 20,000 $ 850,000 $ 31,000 $ 663,000 $ 535,000 $ 852,000 $ 9,096,000 Related loan balances as of September 30, 2017 Ending balance $ 301,227,000 $ 32,893,000 $ 172,986,000 $ 33,311,000 $ 429,572,000 $ 15,495,000 $ 110,178,000 $ 25,424,000 $ — $ 1,121,086,000 Ending balance specifically evaluated for impairment $ 9,836,000 $ 763,000 $ 10,250,000 $ — $ 12,641,000 $ — $ 1,519,000 $ 51,000 $ — $ 35,060,000 Ending balance collectively evaluated for impairment $ 291,391,000 $ 32,130,000 $ 162,736,000 $ 33,311,000 $ 416,931,000 $ 15,495,000 $ 108,659,000 $ 25,373,000 $ — $ 1,086,026,000 The following table presents allowance for loan losses activity by class for the yearended December 31, 2016 and allowance for loan loss balances by class and related loan balances by class as of December 31, 2016 : Municipal Residential Home Equity Line of Credit Consumer Unallocated Total Real Estate Construction Other Term Construction Beginning balance $ 3,120,000 $ 580,000 $ 1,452,000 $ 17,000 $ 1,391,000 $ 24,000 $ 893,000 $ 566,000 $ 1,873,000 $ 9,916,000 Charge offs 294,000 75,000 376,000 — 379,000 — 147,000 450,000 — 1,721,000 Recoveries — 8,000 129,000 — 93,000 — 5,000 108,000 — 343,000 Provision (credit) 1,162,000 (117,000 ) 575,000 1,000 183,000 20,000 56,000 335,000 (615,000 ) 1,600,000 Ending balance $ 3,988,000 $ 396,000 $ 1,780,000 $ 18,000 $ 1,288,000 $ 44,000 $ 807,000 $ 559,000 $ 1,258,000 $ 10,138,000 Ending balance specifically evaluated for impairment $ 505,000 $ 100,000 $ 39,000 $ — $ 304,000 $ — $ 26,000 $ — $ — $ 974,000 Ending balance collectively evaluated for impairment $ 3,483,000 $ 296,000 $ 1,741,000 $ 18,000 $ 984,000 $ 44,000 $ 781,000 $ 559,000 $ 1,258,000 $ 9,164,000 Ending balance $ 302,506,000 $ 25,406,000 $ 150,769,000 $ 27,056,000 $ 411,469,000 $ 18,303,000 $ 110,907,000 $ 25,110,000 $ — $ 1,071,526,000 Ending balance specifically evaluated for impairment $ 10,021,000 $ 763,000 $ 1,743,000 $ — $ 13,669,000 $ — $ 1,387,000 $ — $ — $ 27,583,000 Ending balance collectively evaluated for impairment $ 292,485,000 $ 24,643,000 $ 149,026,000 $ 27,056,000 $ 397,800,000 $ 18,303,000 $ 109,520,000 $ 25,110,000 $ — $ 1,043,943,000 The following table presents allowance for loan losses activity by class for the nine months and quarter ended September 30, 2016 , and allowance for loan loss balances by class and related loan balances by class as of September 30, 2016 : Commercial Municipal Residential Home Equity Line of Credit Consumer Unallocated Total Real Estate Construction Other Term Construction For the nine months ended September 30, 2016 Beginning balance $ 3,120,000 $ 580,000 $ 1,452,000 $ 17,000 $ 1,391,000 $ 24,000 $ 893,000 $ 566,000 $ 1,873,000 $ 9,916,000 Charge offs 33,000 75,000 167,000 — 338,000 — 147,000 246,000 — 1,006,000 Recoveries — 4,000 80,000 — 88,000 — 3,000 88,000 — 263,000 Provision (credit) 952,000 (182,000 ) 323,000 1,000 218,000 13,000 125,000 210,000 (535,000 ) 1,125,000 Ending balance $ 4,039,000 $ 327,000 $ 1,688,000 $ 18,000 $ 1,359,000 $ 37,000 $ 874,000 $ 618,000 $ 1,338,000 $ 10,298,000 For the three months ended September 30, 2016 Beginning balance $ 3,955,000 $ 318,000 $ 1,778,000 $ 17,000 $ 1,365,000 $ 34,000 $ 880,000 $ 635,000 $ 1,216,000 $ 10,198,000 Charge offs — 17,000 137,000 — 72,000 — 25,000 89,000 — 340,000 Recoveries — 4,000 24,000 — 14,000 — 1,000 22,000 — 65,000 Provision 84,000 22,000 23,000 1,000 52,000 3,000 18,000 50,000 122,000 375,000 Ending balance $ 4,039,000 $ 327,000 $ 1,688,000 $ 18,000 $ 1,359,000 $ 37,000 $ 874,000 $ 618,000 $ 1,338,000 $ 10,298,000 Allowance for loan losses as of September 30, 2016 Ending balance specifically evaluated for impairment $ 381,000 $ 99,000 $ 68,000 $ — $ 318,000 $ — $ 32,000 $ 51,000 $ — $ 949,000 Ending balance collectively evaluated for impairment $ 3,658,000 $ 228,000 $ 1,620,000 $ 18,000 $ 1,041,000 $ 37,000 $ 842,000 $ 567,000 $ 1,338,000 $ 9,349,000 Related loan balances as of September 30, 2016 Ending balance $ 297,808,000 $ 18,828,000 $ 131,198,000 $ 26,153,000 $ 403,159,000 $ 14,269,000 $ 111,994,000 $ 25,583,000 $ — $ 1,028,992,000 Ending balance specifically evaluated for impairment $ 10,442,000 $ 788,000 $ 1,254,000 $ — $ 14,131,000 $ — $ 1,400,000 $ 170,000 $ — $ 28,185,000 Ending balance collectively evaluated for impairment $ 287,366,000 $ 18,040,000 $ 129,944,000 $ 26,153,000 $ 389,028,000 $ 14,269,000 $ 110,594,000 $ 25,413,000 $ — $ 1,000,807,000

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [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, 2017 , 127,560 shares of restricted stock had been granted under the 2010 Plan, of which 71,086 shares remain restricted as of September 30, 2017 as detailed in the following table: Year Granted Vesting Term (In Years) Shares Remaining Term (In Years) 2013 5.0 14,776 0.6 2014 5.0 10,422 1.6 2015 5.0 12,023 2.6 2016 5.0 15,015 3.6 2017 1.0 3,976 0.7 2017 3.0 4,902 2.6 2017 5.0 9,972 4.6 71,086 2.3 The compensation cost related to these restricted stock grants is $1,428,000 and is recognized over the vesting terms of each grant. In the nine months ended September 30, 2017 , $247,000 of expense was recognized for these restricted shares, leaving $745,000 in unrecognized expense as of September 30, 2017 . In the nine months ended September 30, 2016 , $215,000 of expense was recognized for restricted shares, leaving $540,000 in unrecognized expense as of September 30, 2016 .

Preferred and Common Stock

Preferred and Common Stock	9 Months Ended
	Sep. 30, 2017
Stockholders' Equity Note [Abstract]
Preferred and Common Stock	Preferred and Common Stock Preferred Stock On January 9, 2009, the Company issued $25,000,000 in Fixed Rate Cumulative Perpetual Preferred Stock, Series A, to the U.S. Treasury ("Treasury') under the Capital Purchase Program ("the CPP Shares"). The CPP Shares qualified as Tier 1 capital on the Company's books for regulatory purposes and ranked senior to the Company's common stock and senior or at an equal level in the Company's capital structure to any other shares of preferred stock the Company may issue in the future. In three separate transactions in 2012 and 2013, the Company repurchased all of the CPP shares from the Treasury. Incident to such issuance of the CPP shares, the Company issued to the Treasury warrants (the "Warrants") to purchase up to 225,904 shares of the Company's common stock at a price per share of $16.60 (subject to adjustment). The Warrants (and any shares of common stock issuable pursuant to the Warrants) are freely transferable by the Treasury to third parties. The Warrants have a term of ten years and could be exercised by the Treasury or a subsequent holder at any time or from time to time during their term. To the extent they had not previously been exercised, the Warrants will expire after ten years . The Warrants were unchanged as a result of the CPP Shares repurchase transactions. In May 2015, the Treasury sold the Warrants to private parties. In accordance with the contractual terms of the Warrants, the number of shares issuable upon exercise and strike price were adjusted at the time of the sale. As a result of this transaction, the aggregate number of shares of common stock issuable under the Warrants were adjusted to 226,819 shares with a strike price of $16.53 per share. In November 2016, the Company repurchased all of the outstanding Warrants for an aggregate purchase price of $1,750,000 . Common Stock Proceeds from sale of common stock totaled $476,000 and $391,000 for the nine months ended September 30, 2017 and 2016 , respectively.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2017
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, 2017 and 2016 : Income (Numerator) Shares (Denominator) Per-Share Amount For the nine months ended September 30, 2017 Net income as reported $ 14,502,000 Basic EPS: Income available to common shareholders 14,502,000 10,744,155 $ 1.35 Effect of dilutive securities: restricted stock 71,923 Diluted EPS: Income available to common shareholders plus assumed conversions $ 14,502,000 10,816,078 $ 1.34 For the nine months ended September 30, 2016 Net income as reported $ 13,689,000 Basic EPS: Income available to common shareholders 13,689,000 10,709,901 $ 1.28 Effect of dilutive securities: restricted stock and warrants 110,492 Diluted EPS: Income available to common shareholders plus assumed conversions $ 13,689,000 10,820,393 $ 1.27 The following table sets forth the computation of basic and diluted EPS for the quarters ended September 30, 2017 and 2016: Income (Numerator) Shares (Denominator) Per-Share Amount For the quarter ended September 30, 2017 Net income as reported $ 4,982,000 Basic EPS: Income available to common shareholders 4,982,000 10,751,630 $ 0.46 Effect of dilutive securities: restricted stock 71,086 Diluted EPS: Income available to common shareholders plus assumed conversions $ 4,982,000 10,822,716 $ 0.46 For the quarter ended September 30, 2016 Net income as reported $ 4,562,000 Basic EPS: Income available to common shareholders 4,562,000 10,718,873 $ 0.43 Effect of dilutive securities: restricted stock and warrants 125,495 Diluted EPS: Income available to common shareholders plus assumed conversions $ 4,562,000 10,844,368 $ 0.42 All earnings per share calculations have been made using the weighted average number of shares outstanding during the period. The potentially dilutive securities are unvested shares of restricted stock granted to certain key members of Management and the warrants. The number of dilutive shares is calculated using the treasury method, assuming that all shares were vested and warrants were exercisable at the end of each period. Warrants that are out-of-the-money are not considered in the calculation of dilutive earnings per share as the effect would be anti-dilutive. The following table presents the number of warrants outstanding as of September 30, 2016 and the amount for which the average market price at period end is above or below the strike price: Outstanding In-the-Money Out-of-the-Money For the three and nine months ended September 30, 2016 Warrants issued to private parties 226,819 226,819 — Total 226,819 226,819 —

Employee Benefit Plans

Employee Benefit Plans	9 Months Ended
	Sep. 30, 2017
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 2016 . The amount for 2017 has not been established. The expense related to the 401(k) plan was $364,000 and $338,000 for the nine months ended September 30, 2017 and 2016 , 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 $161,000 for the nine months ended September 30, 2017 and 2016. As of September 30, 2017 , the associated accrued liability included in other liabilities in the balance sheet was $3,040,000 compared to $3,073,000 and $3,072,000 at December 31, 2016 and September 30, 2016 , 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 seven 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, 2017 2016 Change in benefit obligation Benefit obligation at beginning of year $ 1,870,000 $ 1,967,000 Interest cost 57,000 63,000 Benefits paid (96,000 ) (90,000 ) Benefit obligation at end of period $ 1,831,000 $ 1,940,000 Funded status Benefit obligation at end of period $ (1,831,000 ) $ (1,940,000 ) Unamortized loss 156,000 240,000 Accrued benefit cost at end of period $ (1,675,000 ) $ (1,700,000 ) The following table sets forth the net periodic pension cost: For the nine months ended September 30, For the quarter ended September 30, 2017 2016 2017 2016 Components of net periodic benefit cost Interest cost $ 57,000 $ 63,000 19,000 21,000 Net periodic benefit cost $ 57,000 $ 63,000 $ 19,000 $ 21,000 Amounts not yet reflected in net periodic benefit cost and included in accumulated other comprehensive income (loss) are as follows: September 30, December 31, 2016 September 30, Unamortized net actuarial loss $ (156,000 ) $ (156,000 ) $ (240,000 ) Deferred tax benefit at 35% 54,000 54,000 84,000 Net unrecognized postretirement benefits included in accumulated other comprehensive income (loss) $ (102,000 ) $ (102,000 ) $ (156,000 ) 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 2017 are $126,000 . Plan expense for 2017 is estimated to be $77,000 . 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, 2017
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 quarters ended September 30, 2017 and 2016 . For the nine months ended September 30, For the quarter ended September 30, 2017 2016 2017 2016 Balance at beginning of period $ (935,000 ) $ 1,123,000 $ (585,000 ) $ 4,000,000 Unrealized gains (losses) arising during the period 640,000 3,106,000 99,000 (1,851,000 ) Reclassification of realized gains during the period (471,000 ) (668,000 ) (468,000 ) (137,000 ) Related deferred taxes (59,000 ) (853,000 ) 129,000 696,000 Net change 110,000 1,585,000 (240,000 ) (1,292,000 ) Balance at end of period $ (825,000 ) $ 2,708,000 $ (825,000 ) $ 2,708,000 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 quarters ended September 30, 2017 and 2016 . For the nine months ended September 30, For the quarter ended September 30, 2017 2016 2017 2016 Balance at beginning of period $ (129,000 ) $ (112,000 ) $ (137,000 ) $ (133,000 ) Amortization of net unrealized gains (losses) (17,000 ) (18,000 ) (5,000 ) 14,000 Related deferred taxes 6,000 6,000 2,000 (5,000 ) Net change (11,000 ) (12,000 ) (3,000 ) 9,000 Balance at end of period $ (140,000 ) $ (124,000 ) $ (140,000 ) $ (124,000 ) The following table presents the effect of the Company's derivative financial instruments included in other comprehensive income (loss) for the nine months and quarters ended September 30, 2017 and 2016 . For the nine months ended September 30, For the quarter ended September 30, 2017 2016 2017 2016 Balance at beginning of period $ 1,163,000 $ — $ 1,055,000 $ (135,000 ) Unrealized gains (losses) on cash flow hedging derivatives arising during the period (198,000 ) 90,000 (31,000 ) 298,000 Related deferred taxes 70,000 (32,000 ) 11,000 (105,000 ) Net change (128,000 ) 58,000 (20,000 ) 193,000 Balance at end of period $ 1,035,000 $ 58,000 $ 1,035,000 $ 58,000 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 quarters ended September 30, 2017 and 2016 . For the nine months ended September 30, For the quarter ended September 30, 2017 2016 2017 2016 Unrecognized postretirement benefits at beginning of period $ (102,000 ) $ (156,000 ) $ (102,000 ) $ (156,000 ) Amortization of unrecognized transition obligation — — — — Change in unamortized net actuarial gain (loss) — — — — Related deferred taxes — — — — Unrecognized postretirement benefits at end of period $ (102,000 ) $ (156,000 ) $ (102,000 ) $ (156,000 )

Financial Derivative Instrument

Financial Derivative Instruments	9 Months Ended
	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Financial Derivative Instruments	Financial Derivative Instruments As part of its overall asset and liability management strategy, the Company periodically uses derivative instruments to minimize significant unplanned fluctuations in earnings and cash flows caused by interest rate volatility. The Company’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 Company recognizes its derivative instruments in the consolidated balance sheet at fair value. On the date the derivative instrument is entered into, the Company designates whether the derivative is part of a hedging relationship (i.e., cash flow or fair value hedge). The Company formally documents relationships between hedging instruments and hedged items, as well as its risk management objective and strategy for undertaking hedge transactions. The Company 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 Company 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. In 2016, interest rate swaps were contracted to limit the Company’s exposure to rising interest rates on short-term liabilities indexed to one-month London Inter-bank Offered Rates (LIBOR). The interest rate swaps were designated as cash flow hedges. The details of the interest rate swap agreements are as follows: As of September 30, 2017 2016 Notional Amount Effective Date Maturity Date Variable Index Received Fixed Rate Paid Fair Value (1) Fair Value (1) $ 30,000,000 June 28, 2016 June 28, 2021 1-Month USD LIBOR 0.940 % $ 934,000 $ 28,000 $ 20,000,000 June 27, 2016 June 27, 2021 1-Month USD LIBOR 0.893 % $ 658,000 62,000 $ 50,000,000 $ 1,592,000 $ 90,000 (1) Presented within other assets in the consolidated balance sheet. 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.

Mortgage Servicing Rights

Mortgage Servicing Rights	9 Months Ended
	Sep. 30, 2017
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, 2017, the prepayment assumption using the PSA model was 201 , which translates into an anticipated prepayment rate of 12.04% . The discount rate is the quarterly average 10 year U.S. Treasury plus 5.00% . Other assumptions include delinquency rates, foreclosure rates, servicing cost inflation, and annual unit loan cost. All assumptions are adjusted periodically to reflect current circumstances. Amortization of mortgage servicing rights, as well as write-offs due to prepayments of the related mortgage loans, are recorded as a charge against mortgage servicing fee income. For the nine months ended September 30, 2017 and 2016 , servicing rights capitalized totaled $339,000 and $370,000 , respectively. Servicing rights amortized for the nine-month periods ended September 30, 2017 and 2016 were $274,000 and $339,000 , respectively. The fair value of servicing rights was $1,888,000 , $1,696,000 and $1,683,000 at September 30, 2017 , December 31, 2016 and September 30, 2016 , respectively. The Bank serviced loans for others totaling $256,530,000 , $250,083,000 and $241,028,000 at September 30, 2017 , December 31, 2016 , and September 30, 2016 , respectively. Mortgage servicing rights are included in other assets and detailed in the following table: September 30, December 31, September 30, Mortgage servicing rights $ 5,199,000 $ 5,901,000 $ 5,718,000 Accumulated amortization (4,072,000 ) (4,680,000 ) (4,560,000 ) Impairment reserve (18,000 ) (108,000 ) (87,000 ) $ 1,109,000 $ 1,113,000 $ 1,071,000

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2017
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, 2014 through 2016.

Certificates of Deposit

Certificates of Deposit	9 Months Ended
	Sep. 30, 2017
Banking and Thrift [Abstract]
Certificates of Deposit	Certificates of Deposit The following table represents the breakdown of certificates of deposit at September 30, 2017 and 2016 , and at December 31, 2016 : September 30, 2017 December 31, 2016 September 30, 2016 Certificates of deposit < $100,000 $ 250,865,000 $ 195,115,000 $ 192,424,000 Certificates $100,000 to $250,000 202,722,000 240,904,000 183,991,000 Certificates $250,000 and over 43,257,000 40,601,000 48,040,000 $ 496,844,000 $ 476,620,000 $ 424,455,000

Reclassifications

Reclassifications	9 Months Ended
	Sep. 30, 2017
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, 2017
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. Cash, Cash Equivalents and Interest-Bearing Deposits in Other Banks The carrying values of cash equivalents, due from banks and federal funds sold approximate their relative fair values. As such, the Company classifies these financial instruments as Level 1. 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 Held for Sale Loans held for sale are recorded at the lower of aggregate carrying value or fair value. The fair value of mortgage loans held for sale is based on what secondary markets are currently offering for portfolios with similar characteristics. As such, the Company classifies mortgage loans held for sale as Level 2. Loans Fair values are estimated for portfolios of loans with similar financial characteristics. 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. Accrued Interest Receivable The fair value estimate of this financial instrument approximates the carrying value as this financial instrument has a short maturity. It is the Company's policy to stop accruing interest on loans for which it is probable that the interest is not collectible. Therefore, this financial instrument has been adjusted for estimated credit loss. As such, the Company classifies accrued interest receivable as Level 2. Deposits The fair value of deposits is based on the discounted value of contractual cash flows. The discount rate is estimated using the rates currently offered for deposits of similar remaining maturities. As such, the Company classifies deposits as Level 2. The fair value estimates do not include the benefit that results from the low-cost funding provided by the deposits compared to the cost of borrowing funds in the market. If that value were considered, the fair value of the Company's net assets could increase. 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, 2017 and 2016 , and December 31, 2016 , 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. Accrued Interest Payable The fair value estimate approximates the carrying amount as this financial instrument has a short maturity. The Company classifies accrued interest payable as Level 2. Off-Balance-Sheet Instruments Off-balance-sheet instruments include loan commitments. Fair values for loan commitments have not been presented as the future revenue derived from such financial instruments is not significant. 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 Recorded at Fair Value on a Recurring Basis The following tables present the balances of assets that were measured at fair value on a recurring basis as of September 30, 2017 , December 31, 2016 and September 30, 2016 . At September 30, 2017 Level 1 Level 2 Level 3 Total Securities available for sale Mortgage-backed securities $ — $ 288,789,000 $ — $ 288,789,000 State and political subdivisions — 6,842,000 — 6,842,000 Other equity securities — 3,368,000 — 3,368,000 Total securities available for sale — 298,999,000 — 298,999,000 Interest rate swap agreements — 1,592,000 — 1,592,000 Total assets $ — $ 300,591,000 $ — $ 300,591,000 At December 31, 2016 Level 1 Level 2 Level 3 Total Securities available for sale Mortgage-backed securities $ — $ 280,604,000 $ — $ 280,604,000 State and political subdivisions — 16,482,000 — 16,482,000 Other equity securities — 3,330,000 — 3,330,000 Total securities available for sale — 300,416,000 — 300,416,000 Interest rate swap agreements — 1,790,000 — 1,790,000 Total assets $ — $ 302,206,000 $ — $ 302,206,000 At September 30, 2016 Level 1 Level 2 Level 3 Total Securities available for sale Mortgage-backed securities $ — $ 261,514,000 $ — $ 261,514,000 State and political subdivisions — 17,484,000 — 17,484,000 Other equity securities — 3,295,000 — 3,295,000 Total securities available for sale — 282,293,000 — 282,293,000 Interest rate swap agreements — 90,000 — 90,000 Total assets $ — $ 282,383,000 $ — $ 282,383,000 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 $53,000 , $205,000 and $162,000 at September 30, 2017 , December 31, 2016 , and September 30, 2016 , respectively. 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 $1,553,000 , $478,000 and $496,000 at September 30, 2017 , December 31, 2016 , and September 30, 2016 , respectively. At September 30, 2017 Level 1 Level 2 Level 3 Total Other real estate owned $ — $ 320,000 $ — $ 320,000 Impaired loans — 7,334,000 — 7,334,000 Total assets $ — $ 7,654,000 $ — $ 7,654,000 At December 31, 2016 Level 1 Level 2 Level 3 Total Other real estate owned $ — $ 375,000 $ — $ 375,000 Impaired loans — 827,000 — 827,000 Total assets $ — $ 1,202,000 $ — $ 1,202,000 At September 30, 2016 Level 1 Level 2 Level 3 Total Other real estate owned $ — $ 855,000 $ — $ 855,000 Impaired loans — 1,311,000 — 1,311,000 Total assets $ — $ 2,166,000 $ — $ 2,166,000 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. The carrying amount and estimated fair values for financial instruments as of September 30, 2017 were as follows: Carrying value Estimated fair value Level 1 Level 2 Level 3 Financial assets Cash and cash equivalents $ 22,375,000 $ 22,375,000 $ 22,375,000 $ — $ — Interest bearing deposits in other banks 584,000 584,000 584,000 — — Securities available for sale 298,999,000 298,999,000 — 298,999,000 — Securities to be held to maturity 242,679,000 245,021,000 — 245,021,000 — Restricted equity securities 10,798,000 10,798,000 — 10,798,000 — Loans held for sale 434,000 434,000 — 434,000 — Loans (net of allowance for loan losses) Commercial Real estate 296,888,000 290,475,000 — 351,000 290,124,000 Construction 32,348,000 31,649,000 — — 31,649,000 Other 169,493,000 167,710,000 — 6,259,000 161,451,000 Municipal 33,289,000 33,466,000 — — 33,466,000 Residential Term 428,318,000 431,112,000 — 724,000 430,388,000 Construction 15,461,000 15,307,000 — — 15,307,000 Home equity line of credit 109,433,000 107,891,000 — — 107,891,000 Consumer 24,844,000 24,416,000 — — 24,416,000 Total loans 1,110,074,000 1,102,026,000 — 7,334,000 1,094,692,000 Mortgage servicing rights 1,109,000 1,888,000 — 1,888,000 — Interest rate swap agreements 1,592,000 1,592,000 — 1,592,000 — Accrued interest receivable 5,820,000 5,820,000 — 5,820,000 — Financial liabilities Demand deposits $ 193,089,000 $ 187,310,000 $ — $ 187,310,000 $ — NOW deposits 291,403,000 274,629,000 — 274,629,000 — Money market deposits 134,257,000 126,541,000 — 126,541,000 — Savings deposits 234,456,000 207,813,000 — 207,813,000 — Local certificates of deposit 220,702,000 220,047,000 — 220,047,000 — National certificates of deposit 276,142,000 276,078,000 — 276,078,000 — Total deposits 1,350,049,000 1,292,418,000 — 1,292,418,000 — Repurchase agreements 75,412,000 72,948,000 — 72,948,000 — Federal Home Loan Bank advances 158,916,000 158,424,000 — 158,424,000 — Total borrowed funds 234,328,000 231,372,000 — 231,372,000 — Accrued interest payable 605,000 605,000 — 605,000 — The carrying amounts and estimated fair values for financial instruments as of December 31, 2016 were as follows: Carrying value Estimated fair value Level 1 Level 2 Level 3 Financial assets Cash and cash equivalents $ 17,366,000 $ 17,366,000 $ 17,366,000 $ — $ — Interest bearing deposits in other banks 293,000 293,000 293,000 — — Securities available for sale 300,416,000 300,416,000 — 300,416,000 — Securities to be held to maturity 226,828,000 225,537,000 — 225,537,000 — Restricted equity securities 11,930,000 11,930,000 — 11,930,000 — Loans held for sale 782,000 782,000 — 782,000 — Loans (net of allowance for loan losses) Commercial Real estate 297,952,000 293,103,000 — 558,000 292,545,000 Construction 24,954,000 24,548,000 — — 24,548,000 Other 148,737,000 147,394,000 — 33,000 147,361,000 Municipal 27,035,000 27,446,000 — — 27,446,000 Residential Term 409,999,000 410,327,000 — 236,000 410,091,000 Construction 18,253,000 18,125,000 — — 18,125,000 Home equity line of credit 109,986,000 108,740,000 — — 108,740,000 Consumer 24,472,000 24,131,000 — — 24,131,000 Total loans 1,061,388,000 1,053,814,000 — 827,000 1,052,987,000 Mortgage servicing rights 1,113,000 1,696,000 — 1,696,000 — Interest rate swap agreements 1,790,000 1,790,000 — 1,790,000 — Accrued interest receivable 5,532,000 5,532,000 — 5,532,000 — Financial liabilities Demand deposits $ 140,482,000 $ 133,342,000 $ — $ 133,342,000 $ — NOW deposits 282,971,000 259,418,000 — 259,418,000 — Money market deposits 125,544,000 115,087,000 — 115,087,000 — Savings deposits 217,340,000 188,260,000 — 188,260,000 — Local certificates of deposit 210,316,000 209,370,000 — 209,370,000 — National certificates of deposit 266,304,000 266,372,000 — 266,372,000 — Total deposits 1,242,957,000 1,171,849,000 — 1,171,849,000 — Repurchase agreements 84,174,000 79,827,000 — 79,827,000 — Federal Home Loan Bank advances 194,727,000 193,733,000 — 193,733,000 — Total borrowed funds 278,901,000 273,560,000 — 273,560,000 — Accrued interest payable 479,000 479,000 — 479,000 — The carrying amount and estimated fair values for financial instruments as of September 30, 2016 were as follows: Carrying value Estimated fair value Level 1 Level 2 Level 3 Financial assets Cash and cash equivalents $ 23,456,000 $ 23,456,000 $ 23,456,000 $ — $ — Interest bearing deposits in other banks 15,098,000 15,098,000 15,098,000 — — Securities available for sale 282,293,000 282,293,000 — 282,293,000 — Securities to be held to maturity 188,770,000 195,797,000 — 195,797,000 — Restricted equity securities 14,048,000 14,048,000 — 14,048,000 — Loans held for sale 1,228,000 1,228,000 — 1,228,000 — Loans (net of allowance for loan losses) Commercial Real estate 293,167,000 289,015,000 — 544,000 288,471,000 Construction 18,452,000 18,191,000 — — 18,191,000 Other 129,258,000 129,143,000 — — 129,143,000 Municipal 26,132,000 27,270,000 — — 27,270,000 Residential Term 401,597,000 409,916,000 — 703,000 409,213,000 Construction 14,226,000 14,170,000 — — 14,170,000 Home equity line of credit 110,989,000 110,220,000 — — 110,220,000 Consumer 24,873,000 24,724,000 — 64,000 24,660,000 Total loans 1,018,694,000 1,022,649,000 — 1,311,000 1,021,338,000 Mortgage servicing rights 1,071,000 1,683,000 — 1,683,000 — Interest rate swap agreements 90,000 90,000 — 90,000 — Accrued interest receivable 5,079,000 5,079,000 — 5,079,000 — Financial liabilities Demand deposits $ 158,476,000 $ 163,498,000 $ — $ 163,498,000 $ — NOW deposits 295,708,000 296,393,000 — 296,393,000 — Money market deposits 76,685,000 71,714,000 — 71,714,000 — Savings deposits 218,425,000 206,331,000 — 206,331,000 — Local certificates of deposit 211,402,000 213,622,000 — 213,622,000 — National certificates of deposit 213,053,000 213,332,000 — 213,332,000 — Total deposits 1,173,749,000 1,164,890,000 — 1,164,890,000 — Repurchase agreements 87,970,000 87,246,000 — 87,246,000 — Federal Home Loan Bank advances 180,128,000 181,918,000 — 181,918,000 — Total borrowed funds 268,098,000 269,164,000 — 269,164,000 — Accrued interest payable 508,000 508,000 — 508,000 —

Impact of Recently Issued Accou

Impact of Recently Issued Accounting Standards	9 Months Ended
	Sep. 30, 2017
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 Updated (“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. Since the guidance does not apply to revenue associated with financial instruments, including loans and securities that are accounted for under other U.S. GAAP, the Company does not expect the new guidance to have a material impact on revenue most closely associated with financial instruments, including interest income and expense. The Company is currently performing an overall assessment of revenue streams and reviewing contracts potentially affected by the ASU including trust and asset management fees, deposit related fees, interchange fees, and merchant income, to determine the potential impact the new guidance is expected to have on the Company’s Consolidated Financial Statements. In addition, the Company continues to follow certain implementation issues relevant to the banking industry which are still pending resolution. The Company plans to adopt ASU No. 2014-09 on January 1, 2018 utilizing the modified retrospective approach. In January 2016, the FASB issued Accounting Standards Update ("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 is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Management does not expect the ASU to 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. Management is reviewing the guidance in the ASU to determine whether it will have a material effect on the Company’s consolidated financial statements. In March 2016, the FASB issued ASU No. 2016-09, Improvements to Employee Share-Based Payment Accounting. This ASU includes provisions intended to simplify various aspects related to how share-based payments are accounted for and presented in the financial statements. Some of the key provisions of this new ASU include: (1) companies will no longer record excess tax benefits and certain tax deficiencies in additional paid-in capital (APIC). Instead, they will record all excess tax benefits and tax deficiencies as income tax expense or benefit in the income statement, and APIC pools will be eliminated. The guidance also eliminates the requirement that excess tax benefits be realized before companies can recognize them. In addition, the guidance requires companies to present excess tax benefits as an operating activity on the statement of cash flows rather than as a financing activity; (2) increase the amount an employer can withhold to cover income taxes on awards and still qualify for the exception to liability classification for shares used to satisfy the employer’s statutory income tax withholding obligation. The new guidance will also require an employer to classify the cash paid to a tax authority when shares are withheld to satisfy its statutory income tax withholding obligation as a financing activity on its statement of cash flows (current guidance did not specify how these cash flows should be classified); and (3) permit companies to make an accounting policy election for the impact of forfeitures on the recognition of expense for share-based payment awards. Forfeitures can be estimated on the date the award is granted, or recognized when they occur. ASU No. 2016-09 is effective for interim and annual reporting periods beginning after December 15, 2016. 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 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for fiscal years beginning after December 15, 2018, including interim periods within such years. The Company is currently evaluating the impact of the adoption of the ASU on its consolidated financial statements, but does not anticipate any material impact at this time. The Bank has formed an implementation committee for ASU 2016-13. To date, committee members have participated in educational seminars on the new standards, begun the process of identifying the historical data sets that will be necessary to implement the new standard, and researched third-party vendors who provide software solutions for ASU 2016-13 modeling and calculation. 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, entities generally 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 amortized 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. Management is reviewing the guidance in the ASU to determine whether it will have a material effect 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 Acounting. 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 include 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. Management does not expect the ASU to 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 year. Early application is permitted in any interim period after issuance of the ASU. Management is reviewing the guidance in this ASU to determie whether it will have a material effect on the Company's consolidated financial statements.

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Financial Derivative Instruments	As part of its overall asset and liability management strategy, the Company periodically uses derivative instruments to minimize significant unplanned fluctuations in earnings and cash flows caused by interest rate volatility. The Company’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 Company recognizes its derivative instruments in the consolidated balance sheet at fair value. On the date the derivative instrument is entered into, the Company designates whether the derivative is part of a hedging relationship (i.e., cash flow or fair value hedge). The Company formally documents relationships between hedging instruments and hedged items, as well as its risk management objective and strategy for undertaking hedge transactions. The Company 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 Company 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. In 2016, interest rate swaps were contracted to limit the Company’s exposure to rising interest rates on short-term liabilities indexed to one-month London Inter-bank Offered Rates (LIBOR). The interest rate swaps were designated as cash flow hedges.
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	The FASB issued Accounting Standards Updated (“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. Since the guidance does not apply to revenue associated with financial instruments, including loans and securities that are accounted for under other U.S. GAAP, the Company does not expect the new guidance to have a material impact on revenue most closely associated with financial instruments, including interest income and expense. The Company is currently performing an overall assessment of revenue streams and reviewing contracts potentially affected by the ASU including trust and asset management fees, deposit related fees, interchange fees, and merchant income, to determine the potential impact the new guidance is expected to have on the Company’s Consolidated Financial Statements. In addition, the Company continues to follow certain implementation issues relevant to the banking industry which are still pending resolution. The Company plans to adopt ASU No. 2014-09 on January 1, 2018 utilizing the modified retrospective approach. In January 2016, the FASB issued Accounting Standards Update ("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 is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Management does not expect the ASU to 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. Management is reviewing the guidance in the ASU to determine whether it will have a material effect on the Company’s consolidated financial statements. In March 2016, the FASB issued ASU No. 2016-09, Improvements to Employee Share-Based Payment Accounting. This ASU includes provisions intended to simplify various aspects related to how share-based payments are accounted for and presented in the financial statements. Some of the key provisions of this new ASU include: (1) companies will no longer record excess tax benefits and certain tax deficiencies in additional paid-in capital (APIC). Instead, they will record all excess tax benefits and tax deficiencies as income tax expense or benefit in the income statement, and APIC pools will be eliminated. The guidance also eliminates the requirement that excess tax benefits be realized before companies can recognize them. In addition, the guidance requires companies to present excess tax benefits as an operating activity on the statement of cash flows rather than as a financing activity; (2) increase the amount an employer can withhold to cover income taxes on awards and still qualify for the exception to liability classification for shares used to satisfy the employer’s statutory income tax withholding obligation. The new guidance will also require an employer to classify the cash paid to a tax authority when shares are withheld to satisfy its statutory income tax withholding obligation as a financing activity on its statement of cash flows (current guidance did not specify how these cash flows should be classified); and (3) permit companies to make an accounting policy election for the impact of forfeitures on the recognition of expense for share-based payment awards. Forfeitures can be estimated on the date the award is granted, or recognized when they occur. ASU No. 2016-09 is effective for interim and annual reporting periods beginning after December 15, 2016. 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 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for fiscal years beginning after December 15, 2018, including interim periods within such years. The Company is currently evaluating the impact of the adoption of the ASU on its consolidated financial statements, but does not anticipate any material impact at this time. The Bank has formed an implementation committee for ASU 2016-13. To date, committee members have participated in educational seminars on the new standards, begun the process of identifying the historical data sets that will be necessary to implement the new standard, and researched third-party vendors who provide software solutions for ASU 2016-13 modeling and calculation. 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, entities generally 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 amortized 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. Management is reviewing the guidance in the ASU to determine whether it will have a material effect 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 Acounting. 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 include 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. Management does not expect the ASU to 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 year. Early application is permitted in any interim period after issuance of the ASU. Management

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2017
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, 2017 : Amortized Cost Unrealized Gains Unrealized Losses Fair Value (Estimated) Securities available for sale Mortgage-backed securities $ 290,151,000 $ 1,339,000 $ (2,701,000 ) $ 288,789,000 State and political subdivisions 6,860,000 28,000 (46,000 ) 6,842,000 Other equity securities 3,257,000 113,000 (2,000 ) 3,368,000 $ 300,268,000 $ 1,480,000 $ (2,749,000 ) $ 298,999,000 Securities to be held to maturity U.S. Government-sponsored agencies $ 11,154,000 $ — $ (197,000 ) $ 10,957,000 Mortgage-backed securities 24,993,000 731,000 (40,000 ) 25,684,000 State and political subdivisions 202,232,000 3,640,000 (1,792,000 ) 204,080,000 Corporate securities 4,300,000 — — 4,300,000 $ 242,679,000 $ 4,371,000 $ (2,029,000 ) $ 245,021,000 Restricted equity securities Federal Home Loan Bank Stock $ 9,761,000 $ — $ — $ 9,761,000 Federal Reserve Bank Stock 1,037,000 — — 1,037,000 $ 10,798,000 $ — $ — $ 10,798,000 The following table summarizes the amortized cost and estimated fair value of investment securities at December 31, 2016 : Amortized Cost Unrealized Gains Unrealized Losses Fair Value (Estimated) Securities available for sale Mortgage-backed securities $ 282,397,000 $ 1,334,000 $ (3,127,000 ) $ 280,604,000 State and political subdivisions 16,183,000 475,000 (176,000 ) 16,482,000 Other equity securities 3,274,000 63,000 (7,000 ) 3,330,000 $ 301,854,000 $ 1,872,000 $ (3,310,000 ) $ 300,416,000 Securities to be held to maturity U.S. Government-sponsored agencies $ 11,943,000 $ 35,000 $ (233,000 ) $ 11,745,000 Mortgage-backed securities 31,201,000 967,000 (147,000 ) 32,021,000 State and political subdivisions 179,384,000 1,971,000 (3,884,000 ) 177,471,000 Corporate securities 4,300,000 — — 4,300,000 $ 226,828,000 $ 2,973,000 $ (4,264,000 ) $ 225,537,000 Restricted equity securities Federal Home Loan Bank Stock $ 10,893,000 $ — $ — $ 10,893,000 Federal Reserve Bank Stock 1,037,000 — — 1,037,000 $ 11,930,000 $ — $ — $ 11,930,000 The following table summarizes the amortized cost and estimated fair value of investment securities at September 30, 2016 : Amortized Cost Unrealized Gains Unrealized Losses Fair Value (Estimated) Securities available for sale Mortgage-backed securities $ 258,179,000 $ 3,848,000 $ (513,000 ) $ 261,514,000 State and political subdivisions 16,689,000 795,000 — 17,484,000 Other equity securities 3,258,000 55,000 (18,000 ) 3,295,000 $ 278,126,000 $ 4,698,000 $ (531,000 ) $ 282,293,000 Securities to be held to maturity U.S. Government-sponsored agencies $ 891,000 $ 15,000 $ — $ 906,000 Mortgage-backed securities 34,186,000 1,386,000 (34,000 ) 35,538,000 State and political subdivisions 149,393,000 5,830,000 (170,000 ) 155,053,000 Corporate securities 4,300,000 — — 4,300,000 $ 188,770,000 $ 7,231,000 $ (204,000 ) $ 195,797,000 Restricted equity securities Federal Home Loan Bank Stock $ 13,011,000 $ — $ — $ 13,011,000 Federal Reserve Bank Stock 1,037,000 — — 1,037,000 $ 14,048,000 $ — $ — $ 14,048,000
Contractual Maturities of Investment Securities	The following table summarizes the contractual maturities of investment securities at September 30, 2017 : 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 $ 176,000 $ 179,000 $ 552,000 $ 559,000 Due in 1 to 5 years 856,000 859,000 17,241,000 17,485,000 Due in 5 to 10 years 33,550,000 33,987,000 37,218,000 37,963,000 Due after 10 years 262,429,000 260,606,000 187,668,000 189,014,000 Equity securities 3,257,000 3,368,000 — — $ 300,268,000 $ 298,999,000 $ 242,679,000 $ 245,021,000 The following table summarizes the contractual maturities of investment securities at December 31, 2016 : 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 $ 253,000 $ 253,000 $ 906,000 $ 913,000 Due in 1 to 5 years 2,251,000 2,298,000 13,451,000 13,714,000 Due in 5 to 10 years 21,043,000 21,505,000 41,588,000 42,448,000 Due after 10 years 275,033,000 273,030,000 170,883,000 168,462,000 Equity securities 3,274,000 3,330,000 — — $ 301,854,000 $ 300,416,000 $ 226,828,000 $ 225,537,000 The following table summarizes the contractual maturities of investment securities at September 30, 2016 : 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 $ 973,000 $ 974,000 $ 1,772,000 $ 1,783,000 Due in 1 to 5 years 3,020,000 3,106,000 13,428,000 13,782,000 Due in 5 to 10 years 22,843,000 23,503,000 39,832,000 41,423,000 Due after 10 years 248,032,000 251,415,000 133,738,000 138,809,000 Equity securities 3,258,000 3,295,000 — — $ 278,126,000 $ 282,293,000 $ 188,770,000 $ 195,797,000
Schedule of Securities Gains and Losses	The following table shows securities gains and losses for the nine months and quarters ended September 30, 2017 and 2016 : For the nine months ended September 30, For the quarter ended September 30, 2017 2016 2017 2016 Proceeds from sales of securities $ 15,587,000 $ 10,305,000 $ 15,584,000 $ 1,351,000 Gross realized gains 471,000 668,000 468,000 137,000 Gross realized losses — — — — Net gain $ 471,000 $ 668,000 $ 468,000 $ 137,000 Related income taxes $ 165,000 $ 234,000 $ 164,000 $ 48,000
Schedule of Securities Temporarily Impaired	Information regarding securities temporarily impaired as of September 30, 2017 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 $ 7,958,000 $ (197,000 ) $ — $ — $ 7,958,000 $ (197,000 ) Mortgage-backed securities 147,326,000 (1,635,000 ) 48,015,000 (1,106,000 ) 195,341,000 (2,741,000 ) State and political subdivisions 39,407,000 (1,186,000 ) 12,583,000 (652,000 ) 51,990,000 (1,838,000 ) Other equity securities — — 10,000 (2,000 ) 10,000 (2,000 ) $ 194,691,000 $ (3,018,000 ) $ 60,608,000 $ (1,760,000 ) $ 255,299,000 $ (4,778,000 ) As of December 31, 2016 , there were 299 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 15 had been temporarily impaired for 12 months or more. Information regarding securities temporarily impaired as of December 31, 2016 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 $ 6,642,000 $ (233,000 ) $ — $ — $ 6,642,000 $ (233,000 ) Mortgage-backed securities 197,528,000 (3,090,000 ) 2,905,000 (184,000 ) 200,433,000 (3,274,000 ) State and political subdivisions 72,348,000 (4,060,000 ) — — 72,348,000 (4,060,000 ) Other equity securities — — 128,000 (7,000 ) 128,000 (7,000 ) $ 276,518,000 $ (7,383,000 ) $ 3,033,000 $ (191,000 ) $ 279,551,000 $ (7,574,000 ) As of September 30, 2016 , there were 71 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 13 had been temporarily impaired for 12 months or more. Information regarding securities temporarily impaired as of September 30, 2016 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 $ 79,118,000 $ (468,000 ) $ 2,407,000 $ (79,000 ) $ 81,525,000 (547,000 ) State and political subdivisions 13,666,000 (170,000 ) — — 13,666,000 (170,000 ) Other equity securities 10,000 (2,000 ) 107,000 (16,000 ) 117,000 (18,000 ) $ 92,794,000 $ (640,000 ) $ 2,514,000 $ (95,000 ) $ 95,308,000 $ (735,000 )

Loans (Tables)

Loans (Tables)	9 Months Ended
	Sep. 30, 2017
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, 2017 and 2016 and at December 31, 2016 : September 30, 2017 December 31, 2016 September 30, 2016 Commercial Real estate $ 301,227,000 26.9 % $ 302,506,000 28.2 % $ 297,808,000 28.9 % Construction 32,893,000 2.9 % 25,406,000 2.4 % 18,828,000 1.8 % Other 172,986,000 15.4 % 150,769,000 14.1 % 131,198,000 12.8 % Municipal 33,311,000 3.0 % 27,056,000 2.5 % 26,153,000 2.5 % Residential Term 429,572,000 38.3 % 411,469,000 38.4 % 403,159,000 39.2 % Construction 15,495,000 1.4 % 18,303,000 1.7 % 14,269,000 1.4 % Home equity line of credit 110,178,000 9.8 % 110,907,000 10.4 % 111,994,000 10.9 % Consumer 25,424,000 2.3 % 25,110,000 2.3 % 25,583,000 2.5 % Total $ 1,121,086,000 100.0 % $ 1,071,526,000 100.0 % $ 1,028,992,000 100.0 %
Past Due Loans Aging	Information on the past-due status of loans by class of financing receivable as of September 30, 2017 , 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 $ 415,000 $ 169,000 $ 1,387,000 $ 1,971,000 $ 299,256,000 $ 301,227,000 $ — Construction — — — — 32,893,000 32,893,000 — Other 345,000 265,000 567,000 1,177,000 171,809,000 172,986,000 — Municipal — — — — 33,311,000 33,311,000 — Residential Term 295,000 3,668,000 1,941,000 5,904,000 423,668,000 429,572,000 344,000 Construction — — — — 15,495,000 15,495,000 — Home equity line of credit 645,000 130,000 986,000 1,761,000 108,417,000 110,178,000 167,000 Consumer 195,000 6,000 18,000 219,000 25,205,000 25,424,000 — Total $ 1,895,000 $ 4,238,000 $ 4,899,000 $ 11,032,000 $ 1,110,054,000 $ 1,121,086,000 $ 511,000 Information on the past-due status of loans by class of financing receivable as of December 31, 2016 , 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 $ 1,039,000 $ 22,000 $ 2,415,000 $ 3,476,000 $ 299,030,000 $ 302,506,000 $ 753,000 Construction — — — — 25,406,000 25,406,000 — Other 202,000 33,000 796,000 1,031,000 149,738,000 150,769,000 20,000 Municipal — — — — 27,056,000 27,056,000 — Residential Term 631,000 3,970,000 1,802,000 6,403,000 405,066,000 411,469,000 — Construction — — — — 18,303,000 18,303,000 — Home equity line of credit 704,000 157,000 703,000 1,564,000 109,343,000 110,907,000 — Consumer 135,000 45,000 4,000 184,000 24,926,000 25,110,000 4,000 Total $ 2,711,000 $ 4,227,000 $ 5,720,000 $ 12,658,000 $ 1,058,868,000 $ 1,071,526,000 $ 777,000 Information on the past-due status of loans by class of financing receivable as of September 30, 2016 , 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 $ — $ 385,000 $ 1,101,000 $ 1,486,000 $ 296,322,000 $ 297,808,000 $ — Construction — — — — 18,828,000 18,828,000 — Other 573,000 18,000 53,000 644,000 130,554,000 131,198,000 — Municipal — — — — 26,153,000 26,153,000 — Residential Term 414,000 3,896,000 1,925,000 6,235,000 396,924,000 403,159,000 — Construction — — — — 14,269,000 14,269,000 — Home equity line of credit 310,000 49,000 708,000 1,067,000 110,927,000 111,994,000 — Consumer 124,000 124,000 62,000 310,000 25,273,000 25,583,000 7,000 Total $ 1,421,000 $ 4,472,000 $ 3,849,000 $ 9,742,000 $ 1,019,250,000 $ 1,028,992,000 $ 7,000
Nonaccrual Loans	Information on nonaccrual loans as of September 30, 2017 and 2016 and at December 31, 2016 is presented in the following table: September 30, 2017 December 31, 2016 September 30, 2016 Commercial Real estate $ 1,929,000 $ 1,907,000 $ 1,222,000 Construction — — — Other 9,520,000 964,000 412,000 Municipal — — — Residential Term 3,875,000 4,060,000 4,475,000 Construction — — — Home equity line of credit 1,001,000 843,000 851,000 Consumer 51,000 — 170,000 Total $ 16,376,000 $ 7,774,000 $ 7,130,000
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, 2017 is presented in the following table: For the nine months ended September 30, 2017 For the quarter ended September 30, 2017 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 $ 5,281,000 $ 5,634,000 $ — $ 5,418,000 $ 149,000 $ 5,398,000 $ 55,000 Construction — — — — — — — Other 2,862,000 2,955,000 — 1,631,000 37,000 1,879,000 12,000 Municipal — — — — — — — Residential Term 10,133,000 11,358,000 — 11,110,000 236,000 10,645,000 75,000 Construction — — — — — — — Home equity line of credit 1,495,000 1,807,000 — 1,417,000 18,000 1,479,000 4,000 Consumer 51,000 102,000 — 8,000 — 23,000 — $ 19,822,000 $ 21,856,000 $ — $ 19,584,000 $ 440,000 $ 19,424,000 $ 146,000 With an Allowance Recorded Commercial Real estate $ 4,555,000 $ 4,891,000 $ 347,000 $ 4,549,000 $ 125,000 $ 4,360,000 $ 40,000 Construction 763,000 763,000 108,000 763,000 28,000 763,000 10,000 Other 7,388,000 7,392,000 1,130,000 991,000 — 2,618,000 — Municipal — — — — — — — Residential Term 2,508,000 2,726,000 307,000 2,078,000 66,000 2,293,000 25,000 Construction — — — — — — — Home equity line of credit 24,000 27,000 24,000 25,000 — 25,000 — Consumer — — — — — — — $ 15,238,000 $ 15,799,000 $ 1,916,000 $ 8,406,000 $ 219,000 $ 10,059,000 $ 75,000 Total Commercial Real estate $ 9,836,000 $ 10,525,000 $ 347,000 $ 9,967,000 $ 274,000 $ 9,758,000 $ 95,000 Construction 763,000 763,000 108,000 763,000 28,000 763,000 10,000 Other 10,250,000 10,347,000 1,130,000 2,622,000 37,000 4,497,000 12,000 Municipal — — — — — — — Residential Term 12,641,000 14,084,000 307,000 13,188,000 302,000 12,938,000 100,000 Construction — — — — — — — Home equity line of credit 1,519,000 1,834,000 24,000 1,442,000 18,000 1,504,000 4,000 Consumer 51,000 102,000 — 8,000 — 23,000 — $ 35,060,000 $ 37,655,000 $ 1,916,000 $ 27,990,000 $ 659,000 $ 29,483,000 $ 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, 2016 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 $ 5,201,000 $ 5,614,000 $ — $ 6,252,000 $ 220,000 Construction — — — 32,000 — Other 1,671,000 1,852,000 — 1,074,000 86,000 Municipal — — — — — Residential Term 11,483,000 12,654,000 — 11,025,000 442,000 Construction — — — — — Home equity line of credit 1,361,000 1,733,000 — 1,213,000 33,000 Consumer — — — 9,000 — $ 19,716,000 $ 21,853,000 $ — $ 19,605,000 $ 781,000 With an Allowance Recorded Commercial Real estate $ 4,820,000 $ 4,925,000 $ 505,000 $ 4,153,000 $ 186,000 Construction 763,000 763,000 100,000 816,000 36,000 Other 72,000 72,000 39,000 317,000 — Municipal — — — — — Residential Term 2,186,000 2,328,000 304,000 3,209,000 101,000 Construction — — — — — Home equity line of credit 26,000 28,000 26,000 69,000 — Consumer — — — 48,000 — $ 7,867,000 $ 8,116,000 $ 974,000 $ 8,612,000 $ 323,000 Total Commercial Real estate $ 10,021,000 $ 10,539,000 $ 505,000 $ 10,405,000 $ 406,000 Construction 763,000 763,000 100,000 848,000 36,000 Other 1,743,000 1,924,000 39,000 1,391,000 86,000 Municipal — — — — — Residential Term 13,669,000 14,982,000 304,000 14,234,000 543,000 Construction — — — — — Home equity line of credit 1,387,000 1,761,000 26,000 1,282,000 33,000 Consumer — — — 57,000 — $ 27,583,000 $ 29,969,000 $ 974,000 $ 28,217,000 $ 1,104,000 A breakdown of impaired loans by class of financing receivable as of and for the period ended September 30, 2016 is presented in the following table: For the nine months ended September 30, 2016 For the quarter ended September 30, 2016 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 $ 5,530,000 $ 5,601,000 $ — $ 6,559,000 $ 186,000 $ 5,540,000 $ 41,000 Construction — — — 43,000 1,000 10,000 — Other 754,000 801,000 — 1,016,000 33,000 883,000 12,000 Municipal — — — — — — — Residential Term 11,675,000 12,830,000 — 10,830,000 340,000 11,183,000 131,000 Construction — — — — — — — Home equity line of credit 1,334,000 1,705,000 — 1,171,000 26,000 1,080,000 13,000 Consumer 55,000 96,000 — 6,000 3,000 18,000 3,000 $ 19,348,000 $ 21,033,000 $ — $ 19,625,000 $ 589,000 $ 18,714,000 $ 200,000 With an Allowance Recorded Commercial Real estate $ 4,912,000 $ 5,094,000 $ 381,000 $ 3,940,000 $ 130,000 $ 4,899,000 $ 59,000 Construction 788,000 788,000 99,000 834,000 27,000 788,000 9,000 Other 500,000 503,000 68,000 312,000 21,000 519,000 9,000 Municipal — — — — — — — Residential Term 2,456,000 2,667,000 318,000 3,529,000 79,000 2,929,000 13,000 Construction — — — — — — — Home equity line of credit 66,000 68,000 32,000 75,000 1,000 80,000 — Consumer 115,000 115,000 51,000 51,000 2,000 115,000 2,000 $ 8,837,000 $ 9,235,000 $ 949,000 $ 8,741,000 $ 260,000 $ 9,330,000 $ 92,000 Total Commercial Real estate $ 10,442,000 $ 10,695,000 $ 381,000 $ 10,499,000 $ 316,000 $ 10,439,000 $ 100,000 Construction 788,000 788,000 99,000 877,000 28,000 798,000 9,000 Other 1,254,000 1,304,000 68,000 1,328,000 54,000 1,402,000 21,000 Municipal — — — — — — — Residential Term 14,131,000 15,497,000 318,000 14,359,000 419,000 14,112,000 144,000 Construction — — — — — — — Home equity line of credit 1,400,000 1,773,000 32,000 1,246,000 27,000 1,160,000 13,000 Consumer 170,000 211,000 51,000 57,000 5,000 133,000 5,000 $ 28,185,000 $ 30,268,000 $ 949,000 $ 28,366,000 $ 849,000 $ 28,044,000 $ 292,000
Troubled Debt Restructurings on Financing Receivables	The following table shows TDRs by class and the specific reserve as of September 30, 2017 : Number of Loans Balance Specific Reserves Commercial Real estate 9 $ 7,908,000 $ 65,000 Construction 1 763,000 108,000 Other 5 730,000 — Municipal — — — Residential Term 49 9,842,000 283,000 Construction — — — Home equity line of credit 3 517,000 — Consumer — — — 67 $ 19,760,000 $ 456,000 The following table shows TDRs by class and the specific reserve as of December 31, 2016 : Number of Loans Balance Specific Reserves Commercial Real estate 10 $ 8,937,000 $ 375,000 Construction 1 763,000 100,000 Other 5 779,000 — Municipal — — — Residential Term 52 10,503,000 261,000 Construction — — — Home equity line of credit 3 544,000 — Consumer — — — 71 $ 21,526,000 $ 736,000 The following table shows TDRs by class and the specific reserve as of September 30, 2016 : Number of Loans Balance Specific Reserves Commercial Real estate 11 $ 9,221,000 $ 116,000 Construction 1 788,000 99,000 Other 7 841,000 5,000 Municipal — — — Residential Term 53 10,626,000 272,000 Construction — — — Home equity line of credit 3 549,000 — Consumer — — — 75 $ 22,025,000 $ 492,000 The following table shows these TDRs by class and the associated specific reserves included in the allowance for loan losses as of September 30, 2017 : Number of Loans Balance Specific Reserves Commercial Real estate — $ — $ — Construction — — — Other 1 6,000 — Municipal — — — Residential Term 12 1,676,000 65,000 Construction — — — Home equity line of credit 1 167,000 — Consumer — — — 14 $ 1,849,000 $ 65,000 The following table shows these TDRs by class and the associated specific reserves included in the allowance for loan losses as of September 30, 2016 : Number of Loans Balance Specific Reserves Commercial Real estate — $ — $ — Construction — — — Other — — — Municipal — — — Residential Term 8 1,060,000 78,000 Construction — — — Home equity line of credit — — — Consumer — — — 8 $ 1,060,000 $ 78,000

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2017
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, 2017 , December 31, 2016 , and September 30, 2016 , by class of financing receivable and allowance element, is presented in the following tables: As of September 30, 2017 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 $ 347,000 $ 1,315,000 $ 2,342,000 $ — $ 4,004,000 Construction 108,000 142,000 253,000 — 503,000 Other 1,130,000 752,000 1,341,000 — 3,223,000 Municipal — — 20,000 — 20,000 Residential Term 307,000 300,000 550,000 — 1,157,000 Construction — 11,000 20,000 — 31,000 Home equity line of credit 24,000 297,000 366,000 — 687,000 Consumer — 247,000 288,000 — 535,000 Unallocated — — — 852,000 852,000 $ 1,916,000 $ 3,064,000 $ 5,180,000 $ 852,000 $ 11,012,000 As of December 31, 2016 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 $ 505,000 $ 1,471,000 $ 2,012,000 $ — $ 3,988,000 Construction 100,000 125,000 171,000 — 396,000 Other 39,000 735,000 1,006,000 — 1,780,000 Municipal — — 18,000 — 18,000 Residential Term 304,000 563,000 421,000 — 1,288,000 Construction — 25,000 19,000 — 44,000 Home equity line of credit 26,000 444,000 337,000 — 807,000 Consumer — 328,000 231,000 — 559,000 Unallocated — — — 1,258,000 1,258,000 $ 974,000 $ 3,691,000 $ 4,215,000 $ 1,258,000 $ 10,138,000 As of September 30, 2016 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 $ 381,000 $ 1,303,000 $ 2,355,000 $ — $ 4,039,000 Construction 99,000 81,000 147,000 — 327,000 Other 68,000 577,000 1,043,000 — 1,688,000 Municipal — — 18,000 — 18,000 Residential Term 318,000 571,000 470,000 — 1,359,000 Construction — 20,000 17,000 — 37,000 Home equity line of credit 32,000 457,000 385,000 — 874,000 Consumer 51,000 318,000 249,000 — 618,000 Unallocated — — — 1,338,000 1,338,000 $ 949,000 $ 3,327,000 $ 4,684,000 $ 1,338,000 $ 10,298,000
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, 2017 : Commercial Real Estate Commercial Construction Commercial Other Municipal Loans All Risk- Rated Loans 1 Strong $ — $ — $ 868,000 $ — $ 868,000 2 Above Average 13,051,000 43,000 7,501,000 32,560,000 53,155,000 3 Satisfactory 76,533,000 3,763,000 49,886,000 751,000 130,933,000 4 Average 146,424,000 18,685,000 79,410,000 — 244,519,000 5 Watch 44,773,000 10,402,000 18,190,000 — 73,365,000 6 OAEM 2,738,000 — 4,625,000 — 7,363,000 7 Substandard 17,585,000 — 12,506,000 — 30,091,000 8 Doubtful 123,000 — — — 123,000 Total $ 301,227,000 $ 32,893,000 $ 172,986,000 $ 33,311,000 $ 540,417,000 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, 2016 : Commercial Real Estate Commercial Construction Commercial Other Municipal Loans All Risk- Rated Loans 1 Strong $ 2,000 $ — $ 850,000 $ — $ 852,000 2 Above Average 13,981,000 49,000 8,934,000 25,527,000 48,491,000 3 Satisfactory 81,286,000 1,345,000 48,212,000 1,529,000 132,372,000 4 Average 139,421,000 16,506,000 65,146,000 — 221,073,000 5 Watch 43,181,000 7,349,000 16,864,000 — 67,394,000 6 OAEM 4,569,000 — 1,587,000 — 6,156,000 7 Substandard 20,066,000 157,000 9,176,000 — 29,399,000 8 Doubtful — — — — — Total $ 302,506,000 $ 25,406,000 $ 150,769,000 $ 27,056,000 $ 505,737,000 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, 2016 : Commercial Real Estate Commercial Construction Commercial Other Municipal Loans All Risk- Rated Loans 1 Strong $ 2,000 $ — $ 721,000 $ — $ 723,000 2 Above Average 24,225,000 53,000 9,546,000 24,592,000 58,416,000 3 Satisfactory 72,082,000 824,000 24,032,000 1,561,000 98,499,000 4 Average 133,835,000 12,764,000 67,811,000 — 214,410,000 5 Watch 41,120,000 5,187,000 24,189,000 — 70,496,000 6 OAEM 9,360,000 — 1,957,000 — 11,317,000 7 Substandard 17,184,000 — 2,942,000 — 20,126,000 8 Doubtful — — — — — Total $ 297,808,000 $ 18,828,000 $ 131,198,000 $ 26,153,000 $ 473,987,000
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, 2017 , and allowance for loan loss balances by class and related loan balances by class as of September 30, 2017 : Commercial Municipal Residential Home Equity Line of Credit Consumer Unallocated Total Real Estate Construction Other Term Construction For the nine months ended September 30, 2017 Beginning balance $ 3,988,000 $ 396,000 $ 1,780,000 $ 18,000 $ 1,288,000 $ 44,000 $ 807,000 $ 559,000 $ 1,258,000 $ 10,138,000 Charge offs 305,000 — 58,000 — 351,000 — 28,000 276,000 — 1,018,000 Recoveries — — 25,000 — 29,000 — 4,000 84,000 — 142,000 Provision (credit) 321,000 107,000 1,476,000 2,000 191,000 (13,000 ) (96,000 ) 168,000 (406,000 ) 1,750,000 Ending balance $ 4,004,000 $ 503,000 $ 3,223,000 $ 20,000 $ 1,157,000 $ 31,000 $ 687,000 $ 535,000 $ 852,000 $ 11,012,000 For the three months ended September 30, 2017 Beginning balance $ 3,996,000 $ 517,000 $ 2,171,000 $ 19,000 $ 999,000 $ 26,000 $ 684,000 $ 529,000 $ 1,670,000 $ 10,611,000 Charge offs — — — — 281,000 — — 120,000 — 401,000 Recoveries — — 7,000 — 10,000 — 1,000 34,000 — 52,000 Provision (credit) 8,000 (14,000 ) 1,045,000 1,000 429,000 5,000 2,000 92,000 (818,000 ) 750,000 Ending balance $ 4,004,000 $ 503,000 $ 3,223,000 $ 20,000 $ 1,157,000 $ 31,000 $ 687,000 $ 535,000 $ 852,000 $ 11,012,000 Allowance for loan losses as of September 30, 2017 Ending balance specifically evaluated for impairment $ 347,000 $ 108,000 $ 1,130,000 $ — $ 307,000 $ — $ 24,000 $ — $ — $ 1,916,000 Ending balance collectively evaluated for impairment $ 3,657,000 $ 395,000 $ 2,093,000 $ 20,000 $ 850,000 $ 31,000 $ 663,000 $ 535,000 $ 852,000 $ 9,096,000 Related loan balances as of September 30, 2017 Ending balance $ 301,227,000 $ 32,893,000 $ 172,986,000 $ 33,311,000 $ 429,572,000 $ 15,495,000 $ 110,178,000 $ 25,424,000 $ — $ 1,121,086,000 Ending balance specifically evaluated for impairment $ 9,836,000 $ 763,000 $ 10,250,000 $ — $ 12,641,000 $ — $ 1,519,000 $ 51,000 $ — $ 35,060,000 Ending balance collectively evaluated for impairment $ 291,391,000 $ 32,130,000 $ 162,736,000 $ 33,311,000 $ 416,931,000 $ 15,495,000 $ 108,659,000 $ 25,373,000 $ — $ 1,086,026,000 The following table presents allowance for loan losses activity by class for the yearended December 31, 2016 and allowance for loan loss balances by class and related loan balances by class as of December 31, 2016 : Municipal Residential Home Equity Line of Credit Consumer Unallocated Total Real Estate Construction Other Term Construction Beginning balance $ 3,120,000 $ 580,000 $ 1,452,000 $ 17,000 $ 1,391,000 $ 24,000 $ 893,000 $ 566,000 $ 1,873,000 $ 9,916,000 Charge offs 294,000 75,000 376,000 — 379,000 — 147,000 450,000 — 1,721,000 Recoveries — 8,000 129,000 — 93,000 — 5,000 108,000 — 343,000 Provision (credit) 1,162,000 (117,000 ) 575,000 1,000 183,000 20,000 56,000 335,000 (615,000 ) 1,600,000 Ending balance $ 3,988,000 $ 396,000 $ 1,780,000 $ 18,000 $ 1,288,000 $ 44,000 $ 807,000 $ 559,000 $ 1,258,000 $ 10,138,000 Ending balance specifically evaluated for impairment $ 505,000 $ 100,000 $ 39,000 $ — $ 304,000 $ — $ 26,000 $ — $ — $ 974,000 Ending balance collectively evaluated for impairment $ 3,483,000 $ 296,000 $ 1,741,000 $ 18,000 $ 984,000 $ 44,000 $ 781,000 $ 559,000 $ 1,258,000 $ 9,164,000 Ending balance $ 302,506,000 $ 25,406,000 $ 150,769,000 $ 27,056,000 $ 411,469,000 $ 18,303,000 $ 110,907,000 $ 25,110,000 $ — $ 1,071,526,000 Ending balance specifically evaluated for impairment $ 10,021,000 $ 763,000 $ 1,743,000 $ — $ 13,669,000 $ — $ 1,387,000 $ — $ — $ 27,583,000 Ending balance collectively evaluated for impairment $ 292,485,000 $ 24,643,000 $ 149,026,000 $ 27,056,000 $ 397,800,000 $ 18,303,000 $ 109,520,000 $ 25,110,000 $ — $ 1,043,943,000 The following table presents allowance for loan losses activity by class for the nine months and quarter ended September 30, 2016 , and allowance for loan loss balances by class and related loan balances by class as of September 30, 2016 : Commercial Municipal Residential Home Equity Line of Credit Consumer Unallocated Total Real Estate Construction Other Term Construction For the nine months ended September 30, 2016 Beginning balance $ 3,120,000 $ 580,000 $ 1,452,000 $ 17,000 $ 1,391,000 $ 24,000 $ 893,000 $ 566,000 $ 1,873,000 $ 9,916,000 Charge offs 33,000 75,000 167,000 — 338,000 — 147,000 246,000 — 1,006,000 Recoveries — 4,000 80,000 — 88,000 — 3,000 88,000 — 263,000 Provision (credit) 952,000 (182,000 ) 323,000 1,000 218,000 13,000 125,000 210,000 (535,000 ) 1,125,000 Ending balance $ 4,039,000 $ 327,000 $ 1,688,000 $ 18,000 $ 1,359,000 $ 37,000 $ 874,000 $ 618,000 $ 1,338,000 $ 10,298,000 For the three months ended September 30, 2016 Beginning balance $ 3,955,000 $ 318,000 $ 1,778,000 $ 17,000 $ 1,365,000 $ 34,000 $ 880,000 $ 635,000 $ 1,216,000 $ 10,198,000 Charge offs — 17,000 137,000 — 72,000 — 25,000 89,000 — 340,000 Recoveries — 4,000 24,000 — 14,000 — 1,000 22,000 — 65,000 Provision 84,000 22,000 23,000 1,000 52,000 3,000 18,000 50,000 122,000 375,000 Ending balance $ 4,039,000 $ 327,000 $ 1,688,000 $ 18,000 $ 1,359,000 $ 37,000 $ 874,000 $ 618,000 $ 1,338,000 $ 10,298,000 Allowance for loan losses as of September 30, 2016 Ending balance specifically evaluated for impairment $ 381,000 $ 99,000 $ 68,000 $ — $ 318,000 $ — $ 32,000 $ 51,000 $ — $ 949,000 Ending balance collectively evaluated for impairment $ 3,658,000 $ 228,000 $ 1,620,000 $ 18,000 $ 1,041,000 $ 37,000 $ 842,000 $ 567,000 $ 1,338,000 $ 9,349,000 Related loan balances as of September 30, 2016 Ending balance $ 297,808,000 $ 18,828,000 $ 131,198,000 $ 26,153,000 $ 403,159,000 $ 14,269,000 $ 111,994,000 $ 25,583,000 $ — $ 1,028,992,000 Ending balance specifically evaluated for impairment $ 10,442,000 $ 788,000 $ 1,254,000 $ — $ 14,131,000 $ — $ 1,400,000 $ 170,000 $ — $ 28,185,000 Ending balance collectively evaluated for impairment $ 287,366,000 $ 18,040,000 $ 129,944,000 $ 26,153,000 $ 389,028,000 $ 14,269,000 $ 110,594,000 $ 25,413,000 $ — $ 1,000,807,000

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Nonvested Restricted Stock Units Activity	As of September 30, 2017 , 127,560 shares of restricted stock had been granted under the 2010 Plan, of which 71,086 shares remain restricted as of September 30, 2017 as detailed in the following table: Year Granted Vesting Term (In Years) Shares Remaining Term (In Years) 2013 5.0 14,776 0.6 2014 5.0 10,422 1.6 2015 5.0 12,023 2.6 2016 5.0 15,015 3.6 2017 1.0 3,976 0.7 2017 3.0 4,902 2.6 2017 5.0 9,972 4.6 71,086 2.3

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2017
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, 2017 and 2016 : Income (Numerator) Shares (Denominator) Per-Share Amount For the nine months ended September 30, 2017 Net income as reported $ 14,502,000 Basic EPS: Income available to common shareholders 14,502,000 10,744,155 $ 1.35 Effect of dilutive securities: restricted stock 71,923 Diluted EPS: Income available to common shareholders plus assumed conversions $ 14,502,000 10,816,078 $ 1.34 For the nine months ended September 30, 2016 Net income as reported $ 13,689,000 Basic EPS: Income available to common shareholders 13,689,000 10,709,901 $ 1.28 Effect of dilutive securities: restricted stock and warrants 110,492 Diluted EPS: Income available to common shareholders plus assumed conversions $ 13,689,000 10,820,393 $ 1.27 The following table sets forth the computation of basic and diluted EPS for the quarters ended September 30, 2017 and 2016: Income (Numerator) Shares (Denominator) Per-Share Amount For the quarter ended September 30, 2017 Net income as reported $ 4,982,000 Basic EPS: Income available to common shareholders 4,982,000 10,751,630 $ 0.46 Effect of dilutive securities: restricted stock 71,086 Diluted EPS: Income available to common shareholders plus assumed conversions $ 4,982,000 10,822,716 $ 0.46 For the quarter ended September 30, 2016 Net income as reported $ 4,562,000 Basic EPS: Income available to common shareholders 4,562,000 10,718,873 $ 0.43 Effect of dilutive securities: restricted stock and warrants 125,495 Diluted EPS: Income available to common shareholders plus assumed conversions $ 4,562,000 10,844,368 $ 0.42
Number of Options and Warrants Outstanding and Amount Above or Below the Strike Price	The following table presents the number of warrants outstanding as of September 30, 2016 and the amount for which the average market price at period end is above or below the strike price: Outstanding In-the-Money Out-of-the-Money For the three and nine months ended September 30, 2016 Warrants issued to private parties 226,819 226,819 — Total 226,819 226,819 —

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2017
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, 2017 2016 Change in benefit obligation Benefit obligation at beginning of year $ 1,870,000 $ 1,967,000 Interest cost 57,000 63,000 Benefits paid (96,000 ) (90,000 ) Benefit obligation at end of period $ 1,831,000 $ 1,940,000 Funded status Benefit obligation at end of period $ (1,831,000 ) $ (1,940,000 ) Unamortized loss 156,000 240,000 Accrued benefit cost at end of period $ (1,675,000 ) $ (1,700,000 )
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, 2017 2016 2017 2016 Components of net periodic benefit cost Interest cost $ 57,000 $ 63,000 19,000 21,000 Net periodic benefit cost $ 57,000 $ 63,000 $ 19,000 $ 21,000
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, 2016 September 30, Unamortized net actuarial loss $ (156,000 ) $ (156,000 ) $ (240,000 ) Deferred tax benefit at 35% 54,000 54,000 84,000 Net unrecognized postretirement benefits included in accumulated other comprehensive income (loss) $ (102,000 ) $ (102,000 ) $ (156,000 )

Other Comprehensive Income (L32

Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2017
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	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 quarters ended September 30, 2017 and 2016 . For the nine months ended September 30, For the quarter ended September 30, 2017 2016 2017 2016 Balance at beginning of period $ (129,000 ) $ (112,000 ) $ (137,000 ) $ (133,000 ) Amortization of net unrealized gains (losses) (17,000 ) (18,000 ) (5,000 ) 14,000 Related deferred taxes 6,000 6,000 2,000 (5,000 ) Net change (11,000 ) (12,000 ) (3,000 ) 9,000 Balance at end of period $ (140,000 ) $ (124,000 ) $ (140,000 ) $ (124,000 ) The following table presents the effect of the Company's derivative financial instruments included in other comprehensive income (loss) for the nine months and quarters ended September 30, 2017 and 2016 . For the nine months ended September 30, For the quarter ended September 30, 2017 2016 2017 2016 Balance at beginning of period $ 1,163,000 $ — $ 1,055,000 $ (135,000 ) Unrealized gains (losses) on cash flow hedging derivatives arising during the period (198,000 ) 90,000 (31,000 ) 298,000 Related deferred taxes 70,000 (32,000 ) 11,000 (105,000 ) Net change (128,000 ) 58,000 (20,000 ) 193,000 Balance at end of period $ 1,035,000 $ 58,000 $ 1,035,000 $ 58,000 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 quarters ended September 30, 2017 and 2016 . For the nine months ended September 30, For the quarter ended September 30, 2017 2016 2017 2016 Unrecognized postretirement benefits at beginning of period $ (102,000 ) $ (156,000 ) $ (102,000 ) $ (156,000 ) Amortization of unrecognized transition obligation — — — — Change in unamortized net actuarial gain (loss) — — — — Related deferred taxes — — — — Unrecognized postretirement benefits at end of period $ (102,000 ) $ (156,000 ) $ (102,000 ) $ (156,000 ) 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 quarters ended September 30, 2017 and 2016 . For the nine months ended September 30, For the quarter ended September 30, 2017 2016 2017 2016 Balance at beginning of period $ (935,000 ) $ 1,123,000 $ (585,000 ) $ 4,000,000 Unrealized gains (losses) arising during the period 640,000 3,106,000 99,000 (1,851,000 ) Reclassification of realized gains during the period (471,000 ) (668,000 ) (468,000 ) (137,000 ) Related deferred taxes (59,000 ) (853,000 ) 129,000 696,000 Net change 110,000 1,585,000 (240,000 ) (1,292,000 ) Balance at end of period $ (825,000 ) $ 2,708,000 $ (825,000 ) $ 2,708,000

Financial Derivative Instrume33

Financial Derivative Instruments (Tables)	9 Months Ended
	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	The details of the interest rate swap agreements are as follows: As of September 30, 2017 2016 Notional Amount Effective Date Maturity Date Variable Index Received Fixed Rate Paid Fair Value (1) Fair Value (1) $ 30,000,000 June 28, 2016 June 28, 2021 1-Month USD LIBOR 0.940 % $ 934,000 $ 28,000 $ 20,000,000 June 27, 2016 June 27, 2021 1-Month USD LIBOR 0.893 % $ 658,000 62,000 $ 50,000,000 $ 1,592,000 $ 90,000 (1) Presented within other assets in the consolidated balance sheet.

Mortgage Servicing Rights (Tabl

Mortgage Servicing Rights (Tables)	9 Months Ended
	Sep. 30, 2017
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 $ 5,199,000 $ 5,901,000 $ 5,718,000 Accumulated amortization (4,072,000 ) (4,680,000 ) (4,560,000 ) Impairment reserve (18,000 ) (108,000 ) (87,000 ) $ 1,109,000 $ 1,113,000 $ 1,071,000

Certificates of Deposit (Tables

Certificates of Deposit (Tables)	9 Months Ended
	Sep. 30, 2017
Banking and Thrift [Abstract]
Certificates of Deposit	The following table represents the breakdown of certificates of deposit at September 30, 2017 and 2016 , and at December 31, 2016 : September 30, 2017 December 31, 2016 September 30, 2016 Certificates of deposit < $100,000 $ 250,865,000 $ 195,115,000 $ 192,424,000 Certificates $100,000 to $250,000 202,722,000 240,904,000 183,991,000 Certificates $250,000 and over 43,257,000 40,601,000 48,040,000 $ 496,844,000 $ 476,620,000 $ 424,455,000

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Assets Measured on Recurring Basis Measured at Fair Value	The following tables present the balances of assets that were measured at fair value on a recurring basis as of September 30, 2017 , December 31, 2016 and September 30, 2016 . At September 30, 2017 Level 1 Level 2 Level 3 Total Securities available for sale Mortgage-backed securities $ — $ 288,789,000 $ — $ 288,789,000 State and political subdivisions — 6,842,000 — 6,842,000 Other equity securities — 3,368,000 — 3,368,000 Total securities available for sale — 298,999,000 — 298,999,000 Interest rate swap agreements — 1,592,000 — 1,592,000 Total assets $ — $ 300,591,000 $ — $ 300,591,000 At December 31, 2016 Level 1 Level 2 Level 3 Total Securities available for sale Mortgage-backed securities $ — $ 280,604,000 $ — $ 280,604,000 State and political subdivisions — 16,482,000 — 16,482,000 Other equity securities — 3,330,000 — 3,330,000 Total securities available for sale — 300,416,000 — 300,416,000 Interest rate swap agreements — 1,790,000 — 1,790,000 Total assets $ — $ 302,206,000 $ — $ 302,206,000 At September 30, 2016 Level 1 Level 2 Level 3 Total Securities available for sale Mortgage-backed securities $ — $ 261,514,000 $ — $ 261,514,000 State and political subdivisions — 17,484,000 — 17,484,000 Other equity securities — 3,295,000 — 3,295,000 Total securities available for sale — 282,293,000 — 282,293,000 Interest rate swap agreements — 90,000 — 90,000 Total assets $ — $ 282,383,000 $ — $ 282,383,000
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 $53,000 , $205,000 and $162,000 at September 30, 2017 , December 31, 2016 , and September 30, 2016 , respectively. 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 $1,553,000 , $478,000 and $496,000 at September 30, 2017 , December 31, 2016 , and September 30, 2016 , respectively. At September 30, 2017 Level 1 Level 2 Level 3 Total Other real estate owned $ — $ 320,000 $ — $ 320,000 Impaired loans — 7,334,000 — 7,334,000 Total assets $ — $ 7,654,000 $ — $ 7,654,000 At December 31, 2016 Level 1 Level 2 Level 3 Total Other real estate owned $ — $ 375,000 $ — $ 375,000 Impaired loans — 827,000 — 827,000 Total assets $ — $ 1,202,000 $ — $ 1,202,000 At September 30, 2016 Level 1 Level 2 Level 3 Total Other real estate owned $ — $ 855,000 $ — $ 855,000 Impaired loans — 1,311,000 — 1,311,000 Total assets $ — $ 2,166,000 $ — $ 2,166,000
Estimated Fair Value of Financial Instruments	The carrying amount and estimated fair values for financial instruments as of September 30, 2017 were as follows: Carrying value Estimated fair value Level 1 Level 2 Level 3 Financial assets Cash and cash equivalents $ 22,375,000 $ 22,375,000 $ 22,375,000 $ — $ — Interest bearing deposits in other banks 584,000 584,000 584,000 — — Securities available for sale 298,999,000 298,999,000 — 298,999,000 — Securities to be held to maturity 242,679,000 245,021,000 — 245,021,000 — Restricted equity securities 10,798,000 10,798,000 — 10,798,000 — Loans held for sale 434,000 434,000 — 434,000 — Loans (net of allowance for loan losses) Commercial Real estate 296,888,000 290,475,000 — 351,000 290,124,000 Construction 32,348,000 31,649,000 — — 31,649,000 Other 169,493,000 167,710,000 — 6,259,000 161,451,000 Municipal 33,289,000 33,466,000 — — 33,466,000 Residential Term 428,318,000 431,112,000 — 724,000 430,388,000 Construction 15,461,000 15,307,000 — — 15,307,000 Home equity line of credit 109,433,000 107,891,000 — — 107,891,000 Consumer 24,844,000 24,416,000 — — 24,416,000 Total loans 1,110,074,000 1,102,026,000 — 7,334,000 1,094,692,000 Mortgage servicing rights 1,109,000 1,888,000 — 1,888,000 — Interest rate swap agreements 1,592,000 1,592,000 — 1,592,000 — Accrued interest receivable 5,820,000 5,820,000 — 5,820,000 — Financial liabilities Demand deposits $ 193,089,000 $ 187,310,000 $ — $ 187,310,000 $ — NOW deposits 291,403,000 274,629,000 — 274,629,000 — Money market deposits 134,257,000 126,541,000 — 126,541,000 — Savings deposits 234,456,000 207,813,000 — 207,813,000 — Local certificates of deposit 220,702,000 220,047,000 — 220,047,000 — National certificates of deposit 276,142,000 276,078,000 — 276,078,000 — Total deposits 1,350,049,000 1,292,418,000 — 1,292,418,000 — Repurchase agreements 75,412,000 72,948,000 — 72,948,000 — Federal Home Loan Bank advances 158,916,000 158,424,000 — 158,424,000 — Total borrowed funds 234,328,000 231,372,000 — 231,372,000 — Accrued interest payable 605,000 605,000 — 605,000 — The carrying amounts and estimated fair values for financial instruments as of December 31, 2016 were as follows: Carrying value Estimated fair value Level 1 Level 2 Level 3 Financial assets Cash and cash equivalents $ 17,366,000 $ 17,366,000 $ 17,366,000 $ — $ — Interest bearing deposits in other banks 293,000 293,000 293,000 — — Securities available for sale 300,416,000 300,416,000 — 300,416,000 — Securities to be held to maturity 226,828,000 225,537,000 — 225,537,000 — Restricted equity securities 11,930,000 11,930,000 — 11,930,000 — Loans held for sale 782,000 782,000 — 782,000 — Loans (net of allowance for loan losses) Commercial Real estate 297,952,000 293,103,000 — 558,000 292,545,000 Construction 24,954,000 24,548,000 — — 24,548,000 Other 148,737,000 147,394,000 — 33,000 147,361,000 Municipal 27,035,000 27,446,000 — — 27,446,000 Residential Term 409,999,000 410,327,000 — 236,000 410,091,000 Construction 18,253,000 18,125,000 — — 18,125,000 Home equity line of credit 109,986,000 108,740,000 — — 108,740,000 Consumer 24,472,000 24,131,000 — — 24,131,000 Total loans 1,061,388,000 1,053,814,000 — 827,000 1,052,987,000 Mortgage servicing rights 1,113,000 1,696,000 — 1,696,000 — Interest rate swap agreements 1,790,000 1,790,000 — 1,790,000 — Accrued interest receivable 5,532,000 5,532,000 — 5,532,000 — Financial liabilities Demand deposits $ 140,482,000 $ 133,342,000 $ — $ 133,342,000 $ — NOW deposits 282,971,000 259,418,000 — 259,418,000 — Money market deposits 125,544,000 115,087,000 — 115,087,000 — Savings deposits 217,340,000 188,260,000 — 188,260,000 — Local certificates of deposit 210,316,000 209,370,000 — 209,370,000 — National certificates of deposit 266,304,000 266,372,000 — 266,372,000 — Total deposits 1,242,957,000 1,171,849,000 — 1,171,849,000 — Repurchase agreements 84,174,000 79,827,000 — 79,827,000 — Federal Home Loan Bank advances 194,727,000 193,733,000 — 193,733,000 — Total borrowed funds 278,901,000 273,560,000 — 273,560,000 — Accrued interest payable 479,000 479,000 — 479,000 — The carrying amount and estimated fair values for financial instruments as of September 30, 2016 were as follows: Carrying value Estimated fair value Level 1 Level 2 Level 3 Financial assets Cash and cash equivalents $ 23,456,000 $ 23,456,000 $ 23,456,000 $ — $ — Interest bearing deposits in other banks 15,098,000 15,098,000 15,098,000 — — Securities available for sale 282,293,000 282,293,000 — 282,293,000 — Securities to be held to maturity 188,770,000 195,797,000 — 195,797,000 — Restricted equity securities 14,048,000 14,048,000 — 14,048,000 — Loans held for sale 1,228,000 1,228,000 — 1,228,000 — Loans (net of allowance for loan losses) Commercial Real estate 293,167,000 289,015,000 — 544,000 288,471,000 Construction 18,452,000 18,191,000 — — 18,191,000 Other 129,258,000 129,143,000 — — 129,143,000 Municipal 26,132,000 27,270,000 — — 27,270,000 Residential Term 401,597,000 409,916,000 — 703,000 409,213,000 Construction 14,226,000 14,170,000 — — 14,170,000 Home equity line of credit 110,989,000 110,220,000 — — 110,220,000 Consumer 24,873,000 24,724,000 — 64,000 24,660,000 Total loans 1,018,694,000 1,022,649,000 — 1,311,000 1,021,338,000 Mortgage servicing rights 1,071,000 1,683,000 — 1,683,000 — Interest rate swap agreements 90,000 90,000 — 90,000 — Accrued interest receivable 5,079,000 5,079,000 — 5,079,000 — Financial liabilities Demand deposits $ 158,476,000 $ 163,498,000 $ — $ 163,498,000 $ — NOW deposits 295,708,000 296,393,000 — 296,393,000 — Money market deposits 76,685,000 71,714,000 — 71,714,000 — Savings deposits 218,425,000 206,331,000 — 206,331,000 — Local certificates of deposit 211,402,000 213,622,000 — 213,622,000 — National certificates of deposit 213,053,000 213,332,000 — 213,332,000 — Total deposits 1,173,749,000 1,164,890,000 — 1,164,890,000 — Repurchase agreements 87,970,000 87,246,000 — 87,246,000 — Federal Home Loan Bank advances 180,128,000 181,918,000 — 181,918,000 — Total borrowed funds 268,098,000 269,164,000 — 269,164,000 — Accrued interest payable 508,000 508,000 — 508,000 —

Investment Securities - Amortiz

Investment Securities - Amortized Cost and Estimated Fair Value of Available for Sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 300,268	$ 301,854	$ 278,126
Unrealized Gains	1,480	1,872	4,698
Unrealized Losses	(2,749)	(3,310)	(531)
Fair Value (Estimated)	298,999	300,416	282,293
Mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	290,151	282,397	258,179
Unrealized Gains	1,339	1,334	3,848
Unrealized Losses	(2,701)	(3,127)	(513)
Fair Value (Estimated)	288,789	280,604	261,514
State and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	6,860	16,183	16,689
Unrealized Gains	28	475	795
Unrealized Losses	(46)	(176)	0
Fair Value (Estimated)	6,842	16,482	17,484
Other equity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3,257	3,274	3,258
Unrealized Gains	113	63	55
Unrealized Losses	(2)	(7)	(18)
Fair Value (Estimated)	$ 3,368	$ 3,330	$ 3,295

Investment Securities - Amort38

Investment Securities - Amortized Cost and Estimated Fair Value of Held to Maturity Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 242,679	$ 226,828	$ 188,770
Unrealized Gains	4,371	2,973	7,231
Unrealized Losses	(2,029)	(4,264)	(204)
Fair Value (Estimated)	245,021	225,537	195,797
U.S. Government-sponsored agencies
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	11,154	11,943	891
Unrealized Gains	0	35	15
Unrealized Losses	(197)	(233)	0
Fair Value (Estimated)	10,957	11,745	906
Mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	24,993	31,201	34,186
Unrealized Gains	731	967	1,386
Unrealized Losses	(40)	(147)	(34)
Fair Value (Estimated)	25,684	32,021	35,538
State and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	202,232	179,384	149,393
Unrealized Gains	3,640	1,971	5,830
Unrealized Losses	(1,792)	(3,884)	(170)
Fair Value (Estimated)	204,080	177,471	155,053
Corporate securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	4,300	4,300	4,300
Unrealized Gains	0	0	0
Unrealized Losses	0	0	0
Fair Value (Estimated)	$ 4,300	$ 4,300	$ 4,300

Investment Securities - Amort39

Investment Securities - Amortized Cost and Estimated Fair Value of Restricted Equity Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Restricted Equity Securities [Line Items]
Amortized Cost	$ 10,798	$ 11,930	$ 14,048
Unrealized Gains	0	0	0
Unrealized Losses	0	0	0
Fair Value (Estimated)	10,798	11,930	14,048
Federal Home Loan Bank Stock
Restricted Equity Securities [Line Items]
Amortized Cost	9,761	10,893	13,011
Unrealized Gains	0	0	0
Unrealized Losses	0	0	0
Fair Value (Estimated)	9,761	10,893	13,011
Federal Reserve Bank Stock
Restricted Equity Securities [Line Items]
Amortized Cost	1,037	1,037	1,037
Unrealized Gains	0	0	0
Unrealized Losses	0	0	0
Fair Value (Estimated)	$ 1,037	$ 1,037	$ 1,037

Investment Securities - Contrac

Investment Securities - Contractual Maturities of Investment Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due in 1 year or less, Securities available for sale, Amortized Cost	$ 176	$ 253	$ 973
Due in 1 to 5 years, Securities available for sale, Amortized Cost	856	2,251	3,020
Due in 5 to 10 years, Securities available for sale, Amortized Cost	33,550	21,043	22,843
Due after 10 years, Securities available for sale, Amortized Cost	262,429	275,033	248,032
Equity securities, Amortized Cost	3,257	3,274	3,258
Amortized Cost	300,268	301,854	278,126
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in 1 year or less, Securities available for sale, Fair Value (Estimated)	179	253	974
Due in 1 to 5 years, Securities available for sale, Fair Value (Estimated)	859	2,298	3,106
Due in 5 to 10 years, Securities available for sale, Fair Value (Estimated)	33,987	21,505	23,503
Due after 10 years, Securities available for sale, Fair Value (Estimated)	260,606	273,030	251,415
Equity securities, Fair Value (Estimated)	3,368	3,330	3,295
Securities available for sale, Fair Value (Estimated)	298,999	300,416	282,293
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount [Abstract]
Due in 1 year or less, Securities to be held to maturity, Amortized Cost	552	906	1,772
Due in 1 to 5 years, Securities to be held to maturity, Amortized Cost	17,241	13,451	13,428
Due in 5 to 10 years, Securities to be held to maturity, Amortized Cost	37,218	41,588	39,832
Due after 10 years, Securities to be held to maturity, Amortized Cost	187,668	170,883	133,738
Securities to be held to maturity, Amortized Cost	242,679	226,828	188,770
Held-to-maturity Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in 1 year or less, Securities to be held to maturity, Fair Value (Estimated)	559	913	1,783
Due in 1 to 5 years, Securities to be held to maturity, Fair Value (Estimated)	17,485	13,714	13,782
Due in 5 to 10 years, Securities to be held to maturity, Fair Value (Estimated)	37,963	42,448	41,423
Due after 10 years, Securities to be held to maturity, Fair Value (Estimated)	189,014	168,462	138,809
Securities to be held to maturity, Fair Value (Estimated)	$ 245,021	$ 225,537	$ 195,797

Investment Securities - Additio

Investment Securities - Additional Information (Details) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2017USD ($)securitystate	Sep. 30, 2016USD ($)security	Dec. 31, 2016USD ($)security	Sep. 30, 2014USD ($)
Investments, Debt and Equity Securities [Abstract]
Fair value of securities pledged as collateral	$ 233,733	$ 249,162	$ 222,328
Number of securities temporarily impaired (security) | security	229	71	299
Number of securities temporarily impaired for twelve months or more (security) | security	61	13	15
Length of time securities temporarily impaired (months)	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	$ 140	$ 124	$ 129
Number of states in New England where FHLB serve (state) | state	6
Federal Home Loan Bank stock	$ 9,761	$ 13,011	$ 10,893

Investment Securities - Gains a

Investment Securities - Gains and Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Proceeds from sales of securities	$ 15,584	$ 1,351	$ 15,587	$ 10,305
Gross realized gains	468	137	471	668
Gross realized losses	0	0	0	0
Net gain	468	137	471	668
Related income taxes	$ 164	$ 48	$ 165	$ 234

Investment Securities - Tempora

Investment Securities - Temporarily Impaired Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Schedule of Available-for-sale Securities [Line Items]
Fair Value (Estimated) (Less than 12 months)	$ 194,691	$ 276,518	$ 92,794
Unrealized Losses (Less than 12 months)	(3,018)	(7,383)	(640)
Fair Value (Estimated) (12 months or more)	60,608	3,033	2,514
Unrealized Losses (12 months or more)	(1,760)	(191)	(95)
Fair Value (Estimated)	255,299	279,551	95,308
Unrealized Losses	(4,778)	(7,574)	(735)
U.S. Government-sponsored agencies
Schedule of Available-for-sale Securities [Line Items]
Fair Value (Estimated) (Less than 12 months)	7,958	6,642
Unrealized Losses (Less than 12 months)	(197)	(233)
Fair Value (Estimated) (12 months or more)	0	0
Unrealized Losses (12 months or more)	0	0
Fair Value (Estimated)	7,958	6,642
Unrealized Losses	(197)	(233)
Mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Fair Value (Estimated) (Less than 12 months)	147,326	197,528	79,118
Unrealized Losses (Less than 12 months)	(1,635)	(3,090)	(468)
Fair Value (Estimated) (12 months or more)	48,015	2,905	2,407
Unrealized Losses (12 months or more)	(1,106)	(184)	(79)
Fair Value (Estimated)	195,341	200,433	81,525
Unrealized Losses	(2,741)	(3,274)	(547)
State and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Fair Value (Estimated) (Less than 12 months)	39,407	72,348	13,666
Unrealized Losses (Less than 12 months)	(1,186)	(4,060)	(170)
Fair Value (Estimated) (12 months or more)	12,583	0	0
Unrealized Losses (12 months or more)	(652)	0	0
Fair Value (Estimated)	51,990	72,348	13,666
Unrealized Losses	(1,838)	(4,060)	(170)
Other equity securities
Schedule of Available-for-sale Securities [Line Items]
Fair Value (Estimated) (Less than 12 months)	0	0	10
Unrealized Losses (Less than 12 months)	0	0	(2)
Fair Value (Estimated) (12 months or more)	10	128	107
Unrealized Losses (12 months or more)	(2)	(7)	(16)
Fair Value (Estimated)	10	128	117
Unrealized Losses	$ (2)	$ (7)	$ (18)

Loans - Loan Portfolio (Details

Loans - Loan Portfolio (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Schedule of Financing Receivables [Line Items]
Loans	$ 1,121,086	$ 1,071,526	$ 1,028,992
Percentage of loans receivable, by type	100.00%	100.00%	100.00%
Commercial | Real estate
Schedule of Financing Receivables [Line Items]
Loans	$ 301,227	$ 302,506	$ 297,808
Percentage of loans receivable, by type	26.90%	28.20%	28.90%
Commercial | Construction
Schedule of Financing Receivables [Line Items]
Loans	$ 32,893	$ 25,406	$ 18,828
Percentage of loans receivable, by type	2.90%	2.40%	1.80%
Commercial | Other
Schedule of Financing Receivables [Line Items]
Loans	$ 172,986	$ 150,769	$ 131,198
Percentage of loans receivable, by type	15.40%	14.10%	12.80%
Municipal
Schedule of Financing Receivables [Line Items]
Loans	$ 33,311	$ 27,056	$ 26,153
Percentage of loans receivable, by type	3.00%	2.50%	2.50%
Residential | Construction
Schedule of Financing Receivables [Line Items]
Loans	$ 15,495	$ 18,303	$ 14,269
Percentage of loans receivable, by type	1.40%	1.70%	1.40%
Residential | Term
Schedule of Financing Receivables [Line Items]
Loans	$ 429,572	$ 411,469	$ 403,159
Percentage of loans receivable, by type	38.30%	38.40%	39.20%
Home equity line of credit
Schedule of Financing Receivables [Line Items]
Loans	$ 110,178	$ 110,907	$ 111,994
Percentage of loans receivable, by type	9.80%	10.40%	10.90%
Consumer
Schedule of Financing Receivables [Line Items]
Loans	$ 25,424	$ 25,110	$ 25,583
Percentage of loans receivable, by type	2.30%	2.30%	2.50%

Loans - Narrative (Details)

Loans - Narrative (Details) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2017USD ($)loan	Sep. 30, 2016USD ($)loan	Dec. 31, 2016USD ($)loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net deferred loan costs	$ 5,560	$ 4,648	$ 4,921
Qualifying first mortgage loans	245,000	262,001	257,122
Loans pledged as collateral	$ 297,712	$ 261,416	$ 261,463
Loans classified as TDR (loan) | loan	67	75	71
Value of loans classified as TDR	$ 19,760	$ 22,025	$ 21,526
Number of Loans | loan	14	8
Value of TDR loans more than 30 days past due	$ 1,849	$ 1,060
Number of TDR loans more than 30 days past due (loan) | loan		0
Number of loans placed on TDR status (loan) | loan	0	0
Number of TDR loans involved in bankruptcy (loan) | loan	4
Value of TDR loans involved in bankruptcy	$ 826
Number of TDR loans on non-accrual status (loan) | loan	8
Value of TDR loans on non-accrual status	$ 1,075
Number of TDR loans in the process of foreclosure (loan) | loan	1
Loans classified as TDRs in process of foreclosure	$ 108
Number of mortgage loans in the process of foreclosure (loan) | loan	14	13
Value of mortgage loans in the process of foreclosure	$ 1,861	$ 1,508
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, 2017	Dec. 31, 2016	Sep. 30, 2016
Schedule of Financing Receivables [Line Items]
All Past Due	$ 11,032	$ 12,658	$ 9,742
Current	1,110,054	1,058,868	1,019,250
Total	1,121,086	1,071,526	1,028,992
90 Days or More & Accruing	511	777	7
30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	1,895	2,711	1,421
60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	4,238	4,227	4,472
90 Days or More Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	4,899	5,720	3,849
Commercial | Real estate
Schedule of Financing Receivables [Line Items]
All Past Due	1,971	3,476	1,486
Current	299,256	299,030	296,322
Total	301,227	302,506	297,808
90 Days or More & Accruing	0	753	0
Commercial | Real estate | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	415	1,039	0
Commercial | Real estate | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	169	22	385
Commercial | Real estate | 90 Days or More Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	1,387	2,415	1,101
Commercial | Construction
Schedule of Financing Receivables [Line Items]
All Past Due	0	0	0
Current	32,893	25,406	18,828
Total	32,893	25,406	18,828
90 Days or More & Accruing	0	0	0
Commercial | Construction | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	0	0	0
Commercial | Construction | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	0	0	0
Commercial | Construction | 90 Days or More Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	0	0	0
Commercial | Other
Schedule of Financing Receivables [Line Items]
All Past Due	1,177	1,031	644
Current	171,809	149,738	130,554
Total	172,986	150,769	131,198
90 Days or More & Accruing	0	20	0
Commercial | Other | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	345	202	573
Commercial | Other | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	265	33	18
Commercial | Other | 90 Days or More Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	567	796	53
Municipal
Schedule of Financing Receivables [Line Items]
All Past Due	0	0	0
Current	33,311	27,056	26,153
Total	33,311	27,056	26,153
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	0	0
Current	15,495	18,303	14,269
Total	15,495	18,303	14,269
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	0	0
Residential | Construction | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	0	0	0
Residential | Construction | 90 Days or More Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	0	0	0
Residential | Term
Schedule of Financing Receivables [Line Items]
All Past Due	5,904	6,403	6,235
Current	423,668	405,066	396,924
Total	429,572	411,469	403,159
90 Days or More & Accruing	344	0	0
Residential | Term | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	295	631	414
Residential | Term | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	3,668	3,970	3,896
Residential | Term | 90 Days or More Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	1,941	1,802	1,925
Home equity line of credit
Schedule of Financing Receivables [Line Items]
All Past Due	1,761	1,564	1,067
Current	108,417	109,343	110,927
Total	110,178	110,907	111,994
90 Days or More & Accruing	167	0	0
Home equity line of credit | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	645	704	310
Home equity line of credit | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	130	157	49
Home equity line of credit | 90 Days or More Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	986	703	708
Consumer
Schedule of Financing Receivables [Line Items]
All Past Due	219	184	310
Current	25,205	24,926	25,273
Total	25,424	25,110	25,583
90 Days or More & Accruing	0	4	7
Consumer | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	195	135	124
Consumer | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	6	45	124
Consumer | 90 Days or More Past Due
Schedule of Financing Receivables [Line Items]
All Past Due	$ 18	$ 4	$ 62

Loans - Nonaccrual Loans (Detai

Loans - Nonaccrual Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	$ 16,376	$ 7,774	$ 7,130
Commercial | Real estate
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	1,929	1,907	1,222
Commercial | Construction
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	0	0	0
Commercial | Other
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	9,520	964	412
Municipal
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	0	0	0
Residential | Construction
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	0	0	0
Residential | Term
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	3,875	4,060	4,475
Home equity line of credit
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	1,001	843	851
Consumer
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	$ 51	$ 0	$ 170

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, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded investment, with no related allowance	$ 19,822	$ 19,348	$ 19,822	$ 19,348	$ 19,716
Recorded investment, with related allowance	15,238	8,837	15,238	8,837	7,867
Recorded Investment	35,060	28,185	35,060	28,185	27,583
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no related allowance	21,856	21,033	21,856	21,033	21,853
Unpaid principal balance with related allowance	15,799	9,235	15,799	9,235	8,116
Unpaid Principal Balance	37,655	30,268	37,655	30,268	29,969
Related Allowance	1,916	949	1,916	949	974
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment, with no related allowance	19,424	18,714	19,584	19,625	19,605
Average recorded investment, with related allowance	10,059	9,330	8,406	8,741	8,612
Average Recorded Investment	29,483	28,044	27,990	28,366	28,217
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized interest income, with no related allowance	146	200	440	589	781
Recognized interest income, with related allowance	75	92	219	260	323
Recognized Interest Income	221	292	659	849	1,104
Commercial | Real estate
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded investment, with no related allowance	5,281	5,530	5,281	5,530	5,201
Recorded investment, with related allowance	4,555	4,912	4,555	4,912	4,820
Recorded Investment	9,836	10,442	9,836	10,442	10,021
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no related allowance	5,634	5,601	5,634	5,601	5,614
Unpaid principal balance with related allowance	4,891	5,094	4,891	5,094	4,925
Unpaid Principal Balance	10,525	10,695	10,525	10,695	10,539
Related Allowance	347	381	347	381	505
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment, with no related allowance	5,398	5,540	5,418	6,559	6,252
Average recorded investment, with related allowance	4,360	4,899	4,549	3,940	4,153
Average Recorded Investment	9,758	10,439	9,967	10,499	10,405
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized interest income, with no related allowance	55	41	149	186	220
Recognized interest income, with related allowance	40	59	125	130	186
Recognized Interest Income	95	100	274	316	406
Commercial | Construction
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded investment, with no related allowance	0	0	0	0	0
Recorded investment, with related allowance	763	788	763	788	763
Recorded Investment	763	788	763	788	763
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	763	788	763	788	763
Unpaid Principal Balance	763	788	763	788	763
Related Allowance	108	99	108	99	100
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment, with no related allowance	0	10	0	43	32
Average recorded investment, with related allowance	763	788	763	834	816
Average Recorded Investment	763	798	763	877	848
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized interest income, with no related allowance	0	0	0	1	0
Recognized interest income, with related allowance	10	9	28	27	36
Recognized Interest Income	10	9	28	28	36
Commercial | Other
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded investment, with no related allowance	2,862	754	2,862	754	1,671
Recorded investment, with related allowance	7,388	500	7,388	500	72
Recorded Investment	10,250	1,254	10,250	1,254	1,743
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no related allowance	2,955	801	2,955	801	1,852
Unpaid principal balance with related allowance	7,392	503	7,392	503	72
Unpaid Principal Balance	10,347	1,304	10,347	1,304	1,924
Related Allowance	1,130	68	1,130	68	39
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment, with no related allowance	1,879	883	1,631	1,016	1,074
Average recorded investment, with related allowance	2,618	519	991	312	317
Average Recorded Investment	4,497	1,402	2,622	1,328	1,391
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized interest income, with no related allowance	12	12	37	33	86
Recognized interest income, with related allowance	0	9	0	21	0
Recognized Interest Income	12	21	37	54	86
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	10,133	11,675	10,133	11,675	11,483
Recorded investment, with related allowance	2,508	2,456	2,508	2,456	2,186
Recorded Investment	12,641	14,131	12,641	14,131	13,669
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no related allowance	11,358	12,830	11,358	12,830	12,654
Unpaid principal balance with related allowance	2,726	2,667	2,726	2,667	2,328
Unpaid Principal Balance	14,084	15,497	14,084	15,497	14,982
Related Allowance	307	318	307	318	304
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment, with no related allowance	10,645	11,183	11,110	10,830	11,025
Average recorded investment, with related allowance	2,293	2,929	2,078	3,529	3,209
Average Recorded Investment	12,938	14,112	13,188	14,359	14,234
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized interest income, with no related allowance	75	131	236	340	442
Recognized interest income, with related allowance	25	13	66	79	101
Recognized Interest Income	100	144	302	419	543
Home equity line of credit
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded investment, with no related allowance	1,495	1,334	1,495	1,334	1,361
Recorded investment, with related allowance	24	66	24	66	26
Recorded Investment	1,519	1,400	1,519	1,400	1,387
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no related allowance	1,807	1,705	1,807	1,705	1,733
Unpaid principal balance with related allowance	27	68	27	68	28
Unpaid Principal Balance	1,834	1,773	1,834	1,773	1,761
Related Allowance	24	32	24	32	26
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment, with no related allowance	1,479	1,080	1,417	1,171	1,213
Average recorded investment, with related allowance	25	80	25	75	69
Average Recorded Investment	1,504	1,160	1,442	1,246	1,282
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized interest income, with no related allowance	4	13	18	26	33
Recognized interest income, with related allowance	0	0	0	1	0
Recognized Interest Income	4	13	18	27	33
Consumer
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded investment, with no related allowance	51	55	51	55	0
Recorded investment, with related allowance	0	115	0	115	0
Recorded Investment	51	170	51	170	0
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid principal balance, with no related allowance	102	96	102	96	0
Unpaid principal balance with related allowance	0	115	0	115	0
Unpaid Principal Balance	102	211	102	211	0
Related Allowance	0	51	0	51	0
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment, with no related allowance	23	18	8	6	9
Average recorded investment, with related allowance	0	115	0	51	48
Average Recorded Investment	23	133	8	57	57
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Recognized interest income, with no related allowance	0	3	0	3	0
Recognized interest income, with related allowance	0	2	0	2	0
Recognized Interest Income	$ 0	$ 5	$ 0	$ 5	$ 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, 2017USD ($)loan	Sep. 30, 2016USD ($)loan	Dec. 31, 2016USD ($)loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	67	75	71
Balance	$ 19,760	$ 22,025	$ 21,526
Specific Reserves	$ 456	$ 492	$ 736
Commercial | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	9	11	10
Balance	$ 7,908	$ 9,221	$ 8,937
Specific Reserves	$ 65	$ 116	$ 375
Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	1	1	1
Balance	$ 763	$ 788	$ 763
Specific Reserves	$ 108	$ 99	$ 100
Commercial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	5	7	5
Balance	$ 730	$ 841	$ 779
Specific Reserves	$ 0	$ 5	$ 0
Municipal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	0	0	0
Balance	$ 0	$ 0	$ 0
Specific Reserves	$ 0	$ 0	$ 0
Residential | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	0	0	0
Balance	$ 0	$ 0	$ 0
Specific Reserves	$ 0	$ 0	$ 0
Residential | Term
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	49	53	52
Balance	$ 9,842	$ 10,626	$ 10,503
Specific Reserves	$ 283	$ 272	$ 261
Home equity line of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	3	3	3
Balance	$ 517	$ 549	$ 544
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 the

Loans - TDR's by Class and the Associated Specific Reserves (Details) $ in Thousands	Sep. 30, 2017USD ($)loan	Sep. 30, 2016USD ($)loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	14	8
Balance	$ 1,849	$ 1,060
Specific Reserves	$ 65	$ 78
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	1	0
Balance	$ 6	$ 0
Specific Reserves	$ 0	$ 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	12	8
Balance	$ 1,676	$ 1,060
Specific Reserves	$ 65	$ 78
Home equity line of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	1	0
Balance	$ 167	$ 0
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

Allowance for Loan Losses - Nar

Allowance for Loan Losses - Narrative (Details) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017USD ($)loan_class	Dec. 31, 2016USD ($)	Jun. 30, 2017USD ($)	Sep. 30, 2016USD ($)	Jun. 30, 2016USD ($)	Dec. 31, 2015USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of classes in the loan portfolio (loan class) | loan_class	8
Allowance for loan and lease losses (percent)	0.46%	0.39%
Allowance for loan and lease losses, period increase (decrease)	$ 965
Allowance for loan losses	$ 11,012	$ 10,138	$ 10,611	$ 10,298	$ 10,198	$ 9,916
Allowance for loan losses as a percent of total loans	0.98%	0.95%		1.00%
Number of classes in the commercial loan portfolio (loan class) | loan_class	3
Residential loans typical loan to value range, maximum (percent)	80.00%
Construction loans accrual to company capital	30.40%
Constructions loan portfolio maximum to company capital	100.00%
Construction and non owner occupied commercial real estate	107.60%
Maximum loan portfolio to company capital	300.00%
Outstanding loans and commitments subject by independent consulting firm	50.00%
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 535	$ 559	$ 529	$ 618	$ 635	$ 566
Delinquent period before consumer loans charged off (days)	120 days
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Delinquent period before residential loans placed on non accrual status (days)	90 days
Delinquent period for loans charged off (days)	180 days
Delinquency period for loans charged off after receipt of notification from bankruptcy court (days)	60 days
Unallocated Reserves
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 852	$ 1,258		$ 1,338
Total reserve allowance accounted for by loan loss allowances (percent)	7.70%	12.40%

Allowance for Loan Losses - Fin

Allowance for Loan Losses - Financing Receivable and Allowance Element by Class (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 11,012	$ 10,611	$ 10,138	$ 10,298	$ 10,198	$ 9,916
Specific Reserves on Loans Evaluated Individually for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	1,916		974	949
General Reserves on Loans Based on Historical Loss Experience
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	3,064		3,691	3,327
Reserves for Qualitative Factors
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	5,180		4,215	4,684
Unallocated Reserves
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	852		1,258	1,338
Commercial | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	4,004	3,996	3,988	4,039	3,955	3,120
Commercial | Real estate | Specific Reserves on Loans Evaluated Individually for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	347		505	381
Commercial | Real estate | General Reserves on Loans Based on Historical Loss Experience
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	1,315		1,471	1,303
Commercial | Real estate | Reserves for Qualitative Factors
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	2,342		2,012	2,355
Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	503	517	396	327	318	580
Commercial | Construction | Specific Reserves on Loans Evaluated Individually for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	108		100	99
Commercial | Construction | General Reserves on Loans Based on Historical Loss Experience
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	142		125	81
Commercial | Construction | Reserves for Qualitative Factors
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	253		171	147
Commercial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	3,223	2,171	1,780	1,688	1,778	1,452
Commercial | Other | Specific Reserves on Loans Evaluated Individually for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	1,130		39	68
Commercial | Other | General Reserves on Loans Based on Historical Loss Experience
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	752		735	577
Commercial | Other | Reserves for Qualitative Factors
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	1,341		1,006	1,043
Municipal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	20	19	18	18	17	17
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	20		18	18
Residential | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	31	26	44	37	34	24
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	11		25	20
Residential | Construction | Reserves for Qualitative Factors
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	20		19	17
Residential | Term
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	1,157	999	1,288	1,359	1,365	1,391
Residential | Term | Specific Reserves on Loans Evaluated Individually for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	307		304	318
Residential | Term | General Reserves on Loans Based on Historical Loss Experience
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	300		563	571
Residential | Term | Reserves for Qualitative Factors
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	550		421	470
Home equity line of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	687	684	807	874	880	893
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	24		26	32
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	297		444	457
Home equity line of credit | Reserves for Qualitative Factors
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	366		337	385
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	535	529	559	618	635	566
Consumer | Specific Reserves on Loans Evaluated Individually for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	0		0	51
Consumer | General Reserves on Loans Based on Historical Loss Experience
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	247		328	318
Consumer | Reserves for Qualitative Factors
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	288		231	249
Unallocated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	852	$ 1,670	1,258	1,338	$ 1,216	$ 1,873
Unallocated | Unallocated Reserves
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 852		$ 1,258	$ 1,338

Allowance for Loan Losses - Ris

Allowance for Loan Losses - Risk Ratings by Segment (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	$ 540,417	$ 505,737	$ 473,987
1 Strong
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	868	852	723
2 Above Average
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	53,155	48,491	58,416
3 Satisfactory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	130,933	132,372	98,499
4 Average
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	244,519	221,073	214,410
5 Watch
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	73,365	67,394	70,496
6 OAEM
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	7,363	6,156	11,317
7 Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	30,091	29,399	20,126
8 Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	123	0	0
Commercial | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	301,227	302,506	297,808
Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	32,893	25,406	18,828
Commercial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	172,986	150,769	131,198
Commercial | 1 Strong | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	0	2	2
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	868	850	721
Commercial | 2 Above Average | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	13,051	13,981	24,225
Commercial | 2 Above Average | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	43	49	53
Commercial | 2 Above Average | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	7,501	8,934	9,546
Commercial | 3 Satisfactory | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	76,533	81,286	72,082
Commercial | 3 Satisfactory | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	3,763	1,345	824
Commercial | 3 Satisfactory | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	49,886	48,212	24,032
Commercial | 4 Average | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	146,424	139,421	133,835
Commercial | 4 Average | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	18,685	16,506	12,764
Commercial | 4 Average | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	79,410	65,146	67,811
Commercial | 5 Watch | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	44,773	43,181	41,120
Commercial | 5 Watch | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	10,402	7,349	5,187
Commercial | 5 Watch | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	18,190	16,864	24,189
Commercial | 6 OAEM | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	2,738	4,569	9,360
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	4,625	1,587	1,957
Commercial | 7 Substandard | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	17,585	20,066	17,184
Commercial | 7 Substandard | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	0	157	0
Commercial | 7 Substandard | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	12,506	9,176	2,942
Commercial | 8 Doubtful | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	123	0	0
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	33,311	27,056	26,153
Municipal | 1 Strong
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	0	0	0
Municipal | 2 Above Average
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	32,560	25,527	24,592
Municipal | 3 Satisfactory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	751	1,529	1,561
Municipal | 4 Average
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and municipal risk-rated loans receivable	0	0	0
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, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 10,611	$ 10,198	$ 10,138	$ 9,916	$ 9,916
Charge offs	401	340	1,018	1,006	1,721
Recoveries	52	65	142	263	343
Provision for loan losses	750	375	1,750	1,125	1,600
Ending balance	11,012	10,298	11,012	10,298	10,138
Ending balance specifically evaluated for impairment	1,916	949	1,916	949	974
Ending balance collectively evaluated for impairment	9,096	9,349	9,096	9,349	9,164
Total	1,121,086	1,028,992	1,121,086	1,028,992	1,071,526
Ending balance specifically evaluated for impairment	35,060	28,185	35,060	28,185	27,583
Ending balance collectively evaluated for impairment	1,086,026	1,000,807	1,086,026	1,000,807	1,043,943
Commercial | Real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,996	3,955	3,988	3,120	3,120
Charge offs	0	0	305	33	294
Recoveries	0	0	0	0	0
Provision for loan losses	8	84	321	952	1,162
Ending balance	4,004	4,039	4,004	4,039	3,988
Ending balance specifically evaluated for impairment	347	381	347	381	505
Ending balance collectively evaluated for impairment	3,657	3,658	3,657	3,658	3,483
Total	301,227	297,808	301,227	297,808	302,506
Ending balance specifically evaluated for impairment	9,836	10,442	9,836	10,442	10,021
Ending balance collectively evaluated for impairment	291,391	287,366	291,391	287,366	292,485
Commercial | Construction
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	517	318	396	580	580
Charge offs	0	17	0	75	75
Recoveries	0	4	0	4	8
Provision for loan losses	(14)	22	107	(182)	(117)
Ending balance	503	327	503	327	396
Ending balance specifically evaluated for impairment	108	99	108	99	100
Ending balance collectively evaluated for impairment	395	228	395	228	296
Total	32,893	18,828	32,893	18,828	25,406
Ending balance specifically evaluated for impairment	763	788	763	788	763
Ending balance collectively evaluated for impairment	32,130	18,040	32,130	18,040	24,643
Commercial | Other
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	2,171	1,778	1,780	1,452	1,452
Charge offs	0	137	58	167	376
Recoveries	7	24	25	80	129
Provision for loan losses	1,045	23	1,476	323	575
Ending balance	3,223	1,688	3,223	1,688	1,780
Ending balance specifically evaluated for impairment	1,130	68	1,130	68	39
Ending balance collectively evaluated for impairment	2,093	1,620	2,093	1,620	1,741
Total	172,986	131,198	172,986	131,198	150,769
Ending balance specifically evaluated for impairment	10,250	1,254	10,250	1,254	1,743
Ending balance collectively evaluated for impairment	162,736	129,944	162,736	129,944	149,026
Municipal
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	19	17	18	17	17
Charge offs	0	0	0	0	0
Recoveries	0	0	0	0	0
Provision for loan losses	1	1	2	1	1
Ending balance	20	18	20	18	18
Ending balance specifically evaluated for impairment	0	0	0	0	0
Ending balance collectively evaluated for impairment	20	18	20	18	18
Total	33,311	26,153	33,311	26,153	27,056
Ending balance specifically evaluated for impairment	0	0	0	0	0
Ending balance collectively evaluated for impairment	33,311	26,153	33,311	26,153	27,056
Residential | Construction
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	26	34	44	24	24
Charge offs	0	0	0	0	0
Recoveries	0	0	0	0	0
Provision for loan losses	5	3	(13)	13	20
Ending balance	31	37	31	37	44
Ending balance specifically evaluated for impairment	0	0	0	0	0
Ending balance collectively evaluated for impairment	31	37	31	37	44
Total	15,495	14,269	15,495	14,269	18,303
Ending balance specifically evaluated for impairment	0	0	0	0	0
Ending balance collectively evaluated for impairment	15,495	14,269	15,495	14,269	18,303
Residential | Term
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	999	1,365	1,288	1,391	1,391
Charge offs	281	72	351	338	379
Recoveries	10	14	29	88	93
Provision for loan losses	429	52	191	218	183
Ending balance	1,157	1,359	1,157	1,359	1,288
Ending balance specifically evaluated for impairment	307	318	307	318	304
Ending balance collectively evaluated for impairment	850	1,041	850	1,041	984
Total	429,572	403,159	429,572	403,159	411,469
Ending balance specifically evaluated for impairment	12,641	14,131	12,641	14,131	13,669
Ending balance collectively evaluated for impairment	416,931	389,028	416,931	389,028	397,800
Home equity line of credit
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	684	880	807	893	893
Charge offs	0	25	28	147	147
Recoveries	1	1	4	3	5
Provision for loan losses	2	18	(96)	125	56
Ending balance	687	874	687	874	807
Ending balance specifically evaluated for impairment	24	32	24	32	26
Ending balance collectively evaluated for impairment	663	842	663	842	781
Total	110,178	111,994	110,178	111,994	110,907
Ending balance specifically evaluated for impairment	1,519	1,400	1,519	1,400	1,387
Ending balance collectively evaluated for impairment	108,659	110,594	108,659	110,594	109,520
Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	529	635	559	566	566
Charge offs	120	89	276	246	450
Recoveries	34	22	84	88	108
Provision for loan losses	92	50	168	210	335
Ending balance	535	618	535	618	559
Ending balance specifically evaluated for impairment	0	51	0	51	0
Ending balance collectively evaluated for impairment	535	567	535	567	559
Total	25,424	25,583	25,424	25,583	25,110
Ending balance specifically evaluated for impairment	51	170	51	170	0
Ending balance collectively evaluated for impairment	25,373	25,413	25,373	25,413	25,110
Unallocated
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,670	1,216	1,258	1,873	1,873
Charge offs	0	0	0	0	0
Recoveries	0	0	0	0	0
Provision for loan losses	(818)	122	(406)	(535)	(615)
Ending balance	852	1,338	852	1,338	1,258
Ending balance specifically evaluated for impairment	0	0	0	0	0
Ending balance collectively evaluated for impairment	852	1,338	852	1,338	1,258
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	9 Months Ended		81 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share based compensation cost	$ 1,428		$ 1,428
Compensation expense recognized	247	$ 215
Share-based compensation expense not yet recognized	$ 745	$ 540	$ 745
Plan 2,010
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)			127,560
Shares	71,086		71,086

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, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares	71,086
Remaining Term (In Years)	2 years 3 months 11 days
2013 | Five Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term (In Years)					5 years
Shares	14,776
Remaining Term (In Years)					7 months 6 days
2014 | Five Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term (In Years)				5 years
Shares	10,422
Remaining Term (In Years)				1 year 7 months 6 days
2015 | Five Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term (In Years)			5 years
Shares	12,023
Remaining Term (In Years)			2 years 7 months 24 days
2016 | Five Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term (In Years)		5 years
Shares	15,015
Remaining Term (In Years)		3 years 7 months 6 days
2017 | Five Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term (In Years)	5 years
Shares	9,972
Remaining Term (In Years)	4 years 7 months 6 days
2017 | One Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term (In Years)	1 year
Shares	3,976
Remaining Term (In Years)	8 months 5 days
2017 | Three Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term (In Years)	3 years
Shares	4,902
Remaining Term (In Years)	2 years 7 months 6 days

Preferred and Common Stock (Det

Preferred and Common Stock (Details) - USD ($) $ / shares in Units, $ in Thousands	Jan. 09, 2009	Nov. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	May 31, 2015
Class of Stock [Line Items]
Number of shares of common stock issuable pursuant to the Warrants, maximum (in shares)	225,904				226,819
Exercise price of the Warrants (in dollars per share)	$ 16.60				$ 16.53
Term of warrants (years)	10 years
Repurchase of warrants		$ 1,750
Proceeds from sale of common stock			$ 476	$ 391
Capital Purchase Program
Class of Stock [Line Items]
Proceeds from sale of common stock			$ 476	$ 391
Series A Preferred Stock
Class of Stock [Line Items]
Proceeds from issuance of CPP Shares	$ 25,000

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, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income (Numerator) [Abstract]
Net income as reported	$ 4,982	$ 4,562	$ 14,502	$ 13,689
Basic EPS: Income available to common shareholders	4,982	4,562	14,502	13,689
Diluted EPS: Income available to common shareholders plus assumed conversions	$ 4,982	$ 4,562	$ 14,502	$ 13,689
Shares (Denominator) [Abstract]
Basic EPS: Income available to common shareholders (in shares)	10,751,630	10,718,873	10,744,155	10,709,901
Effect of dilutive securities: restricted stock (in shares)	71,086	125,495	71,923	110,492
Diluted EPS: Income available to common shareholders plus assumed conversions (in shares)	10,822,716	10,844,368	10,816,078	10,820,393
Per-Share Amount [Abstract]
Basic EPS: Income available to common shareholders (in dollars per share)	$ 0.46	$ 0.43	$ 1.35	$ 1.28
Diluted EPS: Income available to common shareholders plus assumed conversions (in dollars per share)	$ 0.46	$ 0.42	$ 1.34	$ 1.27

Earnings Per Share - Schedule59

Earnings Per Share - Schedule of Options and Warrants Outstanding (Details)	Sep. 30, 2016shares
Schedule of Outstanding Options And Warrants [Line Items]
Warrants to private parties (in shares)	226,819
Total dilutive securities (in shares)	226,819
In-the-Money
Schedule of Outstanding Options And Warrants [Line Items]
Warrants to private parties (in shares)	226,819
Total dilutive securities (in shares)	226,819
Out-of-the-Money
Schedule of Outstanding Options And Warrants [Line Items]
Warrants to private parties (in shares)	0
Total dilutive securities (in shares)	0

Employee Benefit Plans - Narrat

Employee Benefit Plans - Narrative (Details)	9 Months Ended
	Sep. 30, 2017USD ($)employeepost_retirement_benefit_plan	Sep. 30, 2016USD ($)	Dec. 31, 2016USD ($)
Retirement Benefits, Description [Abstract]
Requisite period of service (months)	3 months
Defined contribution plan employer maximum percentage match of annual salary based on employee contribution	3.00%
Defined contribution plan employer maximum percentage of annual profit-sharing contribution to plan for benefit of employee			2.00%
Expense related to 401(k) plan	$ 364,000	$ 338,000
Unfunded, supplemental retirement benefits payable period (years)	20 years
Pension expense	$ 161,000	161,000
Accrued pension liability	$ 3,040,000	$ 3,072,000	$ 3,073,000
Number of post retirement benefit plans (post retirement benefit plan) | post_retirement_benefit_plan	2
Number of employees currently eligible (employee) | employee	7
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	$ 126,000
Estimated plan expense	77,000
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, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Change in benefit obligation
Benefit obligation at beginning of year			$ 1,870	$ 1,967
Interest cost	$ 19	$ 21	57	63
Benefits paid			(96)	(90)
Benefit obligation at end of period	1,831	1,940	1,831	1,940
Funded status
Benefit obligation at end of period	(1,831)	(1,940)	(1,870)	(1,967)	$ (1,831)	$ (1,940)
Unamortized loss					156	240
Accrued benefit cost at end of period					$ (1,675)	$ (1,700)
Components of net periodic benefit cost
Interest cost	19	21	57	63
Net periodic benefit cost	$ 19	$ 21	$ 57	$ 63

Employee Benefit Plans - Schedu

Employee Benefit Plans - Schedule of Net Periodic Benefit Cost Not Yet Recognized (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Retirement Benefits, Description [Abstract]
Unamortized net actuarial loss	$ (156)	$ (240)	$ (156)
Deferred tax benefit at 35%	54	84	54
Net unrecognized postretirement benefits included in accumulated other comprehensive income (loss)	$ (102)	$ (156)	$ (102)
Deferred tax benefit, percentage	35.00%	35.00%	35.00%

Other Comprehensive Income (L63

Other Comprehensive Income (Loss) - Summary of Available for Sale Securities Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			$ 172,521	$ 167,498
Other comprehensive income (loss)	$ (263)	$ (1,090)	(29)	1,631
Ending balance	179,882	175,994	179,882	175,994
Accumulated Net Investment Gain (Loss) Attributable to Parent
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(585)	4,000	(935)	1,123
Unrealized gains (losses) arising during the period	99	(1,851)	640	3,106
Reclassification of realized gains during the period	(468)	(137)	(471)	(668)
Related deferred taxes	129	696	(59)	(853)
Other comprehensive income (loss)	(240)	(1,292)	110	1,585
Ending balance	$ (825)	$ 2,708	$ (825)	$ 2,708

Other Comprehensive Income (L64

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, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Reclassification of Available-for-Sale Securities to Held-to-maturity Roll Forward [Roll Forward]
Beginning balance			$ 172,521	$ 167,498
Other comprehensive income (loss)	$ (263)	$ (1,090)	(29)	1,631
Ending balance	179,882	175,994	179,882	175,994
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	(137)	(133)	(129)	(112)
Amortization of net unrealized gains (losses)	(5)	14	(17)	(18)
Related deferred taxes	2	(5)	6	6
Other comprehensive income (loss)	(3)	9	(11)	(12)
Ending balance	$ (140)	$ (124)	$ (140)	$ (124)

Other Comprehensive Income (L65

Other Comprehensive Income (Loss) - Derivative Instruments Included in Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			$ 172,521	$ 167,498
Other comprehensive income (loss)	$ (263)	$ (1,090)	(29)	1,631
Ending balance	179,882	175,994	179,882	175,994
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	1,055	(135)	1,163	0
Unrealized gains (losses) arising during the period	(31)	298	(198)	90
Related deferred taxes	11	(105)	70	(32)
Other comprehensive income (loss)	(20)	193	(128)	58
Ending balance	$ 1,035	$ 58	$ 1,035	$ 58

Other Comprehensive Income (L66

Other Comprehensive Income (Loss) - Reclassification out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance			$ 172,521	$ 167,498
Ending balance	$ 179,882	$ 175,994	179,882	175,994
Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(102)	(156)	(102)	(156)
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	$ (102)	$ (156)	$ (102)	$ (156)

Financial Derivative Instrume67

Financial Derivative Instruments (Details) - Cash Flow Hedging - Designated as Hedging Instrument - USD ($)	Sep. 30, 2017	Sep. 30, 2016
Interest Rate Swap June 28 2016
Derivative [Line Items]
Notional Amount	$ 30,000,000
Fixed Rate Paid	0.94%
Fair Value	$ 934,000	$ 28,000
Interest Rate Swap June 27 2016
Derivative [Line Items]
Notional Amount	$ 20,000,000
Fixed Rate Paid	0.893%
Fair Value	$ 658,000	62,000
Interest Rate Swap
Derivative [Line Items]
Notional Amount	50,000,000
Fair Value	$ 1,592,000	$ 90,000

Mortgage Servicing Rights - Nar

Mortgage Servicing Rights - Narrative (Details) - USD ($) $ in Thousands	6 Months Ended		9 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Transfers and Servicing [Abstract]
Moving average of weekly prepayment assumption (months)			3 months
Prepayment speed			12.04%
Average quarterly discount rate			10 years
Discount rate adjustment rate			5.00%
Servicing rights capitalized	$ 339	$ 370
Servicing rights amortized			$ 274	$ 339
Mortgage servicing rights			1,888	1,683	$ 1,696
Residential mortgage loans serviced for others, principal			$ 256,530	$ 241,028	$ 250,083

Mortgage Servicing Rights - Sch

Mortgage Servicing Rights - Schedule of Mortgage Servicing Rights (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Transfers and Servicing [Abstract]
Mortgage servicing rights	$ 5,199	$ 5,901	$ 5,718
Accumulated amortization	(4,072)	(4,680)	(4,560)
Impairment reserve	(18)	(108)	(87)
Total servicing asset at fair value	$ 1,109	$ 1,113	$ 1,071

Certificates of Deposit (Detail

Certificates of Deposit (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Banking and Thrift [Abstract]
Certificates of deposit of less than $100,000	$ 250,865	$ 195,115	$ 192,424
Certificates $100,000 to $250,000	202,722	240,904	183,991
Certificates $250,000 and over	43,257	40,601	48,040
Total certificates of deposit	$ 496,844	$ 476,620	$ 424,455

Fair Value - Assets Recorded at

Fair Value - Assets Recorded at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	$ 298,999	$ 300,416	$ 282,293
Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	288,789	280,604	261,514
State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	6,842	16,482	17,484
Other equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	3,368	3,330	3,295
Total Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	298,999	300,416	282,293
Derivative asset	1,592	1,790	90
Total Fair Value | 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	0
Total Fair Value | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	298,999	300,416	282,293
Derivative asset	1,592	1,790	90
Total Fair Value | 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	0
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
Total assets	0	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
Fair Value, Measurements, Recurring | Level 1 | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0	0
Fair Value, Measurements, Recurring | Level 1 | State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0	0
Fair Value, Measurements, Recurring | Level 1 | Other equity 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 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	298,999	300,416	282,293
Total assets	300,591	302,206	282,383
Fair Value, Measurements, Recurring | Level 2 | Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	1,592	1,790	90
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	288,789	280,604	261,514
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	6,842	16,482	17,484
Fair Value, Measurements, Recurring | Level 2 | Other equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	3,368	3,330	3,295
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
Total assets	0	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
Fair Value, Measurements, Recurring | Level 3 | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0	0
Fair Value, Measurements, Recurring | Level 3 | State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0	0
Fair Value, Measurements, Recurring | Level 3 | Other equity 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 | Total Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	298,999	300,416	282,293
Total assets	300,591	302,206	282,383
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	1,592	1,790	90
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	288,789	280,604	261,514
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	6,842	16,482	17,484
Fair Value, Measurements, Recurring | Total Fair Value | Other equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	$ 3,368	$ 3,330	$ 3,295

Fair Value - Additional Informa

Fair Value - Additional Information (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Valuation allowance on real estate owned	$ 53	$ 205	$ 162
Valuation allowance on impaired financing receivable	$ 1,553	$ 478	$ 496

Fair Value - Assets Recorded 73

Fair Value - Assets Recorded at Fair Value on a Non-Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned	$ 320	$ 375	$ 855
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	320	375	855
Impaired loans	7,334	827	1,311
Total assets	7,654	1,202	2,166
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	320	375	855
Impaired loans	7,334	827	1,311
Total assets	$ 7,654	$ 1,202	$ 2,166

Fair Value - Assets and Liabili

Fair Value - Assets and Liabilities at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 22,375	$ 17,366	$ 23,456	$ 14,299
Interest bearing deposits in other banks	584	293	15,098
Securities available for sale	298,999	300,416	282,293
Securities to be held to maturity	242,679	226,828	188,770
Securities to be held to maturity	245,021	225,537	195,797
Restricted equity securities	10,798	11,930	14,048
Loans held for sale	434	782	1,228
Mortgage servicing rights	1,888	1,696	1,683
Demand deposits	193,089	140,482	158,476
NOW deposits	291,403	282,971	295,708
Money market deposits	134,257	125,544	76,685
Savings deposits	234,456	217,340	218,425
Total deposits	1,350,049	1,242,957	1,173,749
Carrying value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	22,375	17,366	23,456
Interest bearing deposits in other banks	584	293	15,098
Securities available for sale	298,999	300,416	282,293
Securities to be held to maturity	242,679	226,828	188,770
Restricted equity securities	10,798	11,930	14,048
Loans held for sale	434	782	1,228
Loans	1,110,074	1,061,388	1,018,694
Mortgage servicing rights	1,109	1,113	1,071
Interest rate swap agreements	1,592	1,790	90
Accrued interest receivable	5,820	5,532	5,079
Demand deposits	193,089	140,482	158,476
NOW deposits	291,403	282,971	295,708
Money market deposits	134,257	125,544	76,685
Savings deposits	234,456	217,340	218,425
Local certificates of deposit	220,702	210,316	211,402
National certificates of deposit	276,142	266,304	213,053
Total deposits	1,350,049	1,242,957	1,173,749
Repurchase agreements	75,412	84,174	87,970
Federal Home Loan Bank advances	158,916	194,727	180,128
Total borrowed funds	234,328	278,901	268,098
Accrued interest payable	605	479	508
Carrying value | Commercial | Real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	296,888	297,952	293,167
Carrying value | Commercial | Construction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	32,348	24,954	18,452
Carrying value | Commercial | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	169,493	148,737	129,258
Carrying value | Municipal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	33,289	27,035	26,132
Carrying value | Residential | Construction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	15,461	18,253	14,226
Carrying value | Residential | Term
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	428,318	409,999	401,597
Carrying value | Home equity line of credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	109,433	109,986	110,989
Carrying value | Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	24,844	24,472	24,873
Total Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	22,375	17,366	23,456
Interest bearing deposits in other banks	584	293	15,098
Securities available for sale	298,999	300,416	282,293
Securities to be held to maturity	245,021	225,537	195,797
Restricted equity securities	10,798	11,930	14,048
Loans held for sale	434	782	1,228
Loans	1,102,026	1,053,814	1,022,649
Mortgage servicing rights	1,888	1,696	1,683
Interest rate swap agreements	1,592	1,790	90
Accrued interest receivable	5,820	5,532	5,079
Demand deposits	187,310	133,342	163,498
NOW deposits	274,629	259,418	296,393
Money market deposits	126,541	115,087	71,714
Savings deposits	207,813	188,260	206,331
Local certificates of deposit	220,047	209,370	213,622
National certificates of deposit	276,078	266,372	213,332
Total deposits	1,292,418	1,171,849	1,164,890
Repurchase agreements	72,948	79,827	87,246
Federal Home Loan Bank advances	158,424	193,733	181,918
Total borrowed funds	231,372	273,560	269,164
Accrued interest payable	605	479	508
Total Fair Value | Commercial | Real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	290,475	293,103	289,015
Total Fair Value | Commercial | Construction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	31,649	24,548	18,191
Total Fair Value | Commercial | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	167,710	147,394	129,143
Total Fair Value | Municipal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	33,466	27,446	27,270
Total Fair Value | Residential | Construction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	15,307	18,125	14,170
Total Fair Value | Residential | Term
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	431,112	410,327	409,916
Total Fair Value | Home equity line of credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	107,891	108,740	110,220
Total Fair Value | Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	24,416	24,131	24,724
Total Fair Value | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	22,375	17,366	23,456
Interest bearing deposits in other banks	584	293	15,098
Securities available for sale	0	0	0
Securities to be held to maturity	0	0	0
Restricted equity securities	0	0	0
Loans held for sale	0	0	0
Loans	0	0	0
Mortgage servicing rights	0	0	0
Interest rate swap agreements	0	0
Accrued interest receivable	0	0	0
Demand deposits	0	0	0
NOW deposits	0	0	0
Money market deposits	0	0	0
Savings deposits	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
Accrued interest payable	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]
Cash and cash equivalents	0	0	0
Interest bearing deposits in other banks	0	0	0
Securities available for sale	298,999	300,416	282,293
Securities to be held to maturity	245,021	225,537	195,797
Restricted equity securities	10,798	11,930	14,048
Loans held for sale	434	782	1,228
Loans	7,334	827	1,311
Mortgage servicing rights	1,888	1,696	1,683
Interest rate swap agreements	1,592	1,790	90
Accrued interest receivable	5,820	5,532	5,079
Demand deposits	187,310	133,342	163,498
NOW deposits	274,629	259,418	296,393
Money market deposits	126,541	115,087	71,714
Savings deposits	207,813	188,260	206,331
Local certificates of deposit	220,047	209,370	213,622
National certificates of deposit	276,078	266,372	213,332
Total deposits	1,292,418	1,171,849	1,164,890
Repurchase agreements	72,948	79,827	87,246
Federal Home Loan Bank advances	158,424	193,733	181,918
Total borrowed funds	231,372	273,560	269,164
Accrued interest payable	605	479	508
Total Fair Value | Level 2 | Commercial | Real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	351	558	544
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	6,259	33	0
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	724	236	703
Total Fair Value | Level 2 | 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 2 | Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0	64
Total Fair Value | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0	0
Interest bearing deposits in other banks	0	0	0
Securities available for sale	0	0	0
Securities to be held to maturity	0	0	0
Restricted equity securities	0	0	0
Loans held for sale	0	0	0
Loans	1,094,692	1,052,987	1,021,338
Mortgage servicing rights	0	0	0
Interest rate swap agreements	0	0
Accrued interest receivable	0	0	0
Demand deposits	0	0	0
NOW deposits	0	0	0
Money market deposits	0	0	0
Savings deposits	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
Accrued interest payable	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	290,124	292,545	288,471
Total Fair Value | Level 3 | Commercial | Construction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	31,649	24,548	18,191
Total Fair Value | Level 3 | Commercial | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	161,451	147,361	129,143
Total Fair Value | Level 3 | Municipal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	33,466	27,446	27,270
Total Fair Value | Level 3 | Residential | Construction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	15,307	18,125	14,170
Total Fair Value | Level 3 | Residential | Term
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	430,388	410,091	409,213
Total Fair Value | Level 3 | Home equity line of credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	107,891	108,740	110,220
Total Fair Value | Level 3 | Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	$ 24,416	$ 24,131	$ 24,660