Arrow Financial (AROW) 10-Q8 May 152015 Q1 Quarterly reportFinancial data

Company Profile

Document_and_Entity_Informatio

Document and Entity Information Document	3 Months Ended
Document and Entity Information Document	Mar. 31, 2015	Apr. 30, 2015
Entity Information [Line Items]
Entity Registrant Name	Arrow Financial Corporation
Entity Central Index Key	717538
Current Fiscal Year End Date	-19
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Amendment Flag	FALSE
Entity Common Stock, Shares Outstanding		12,636,663
Entity Well-known Seasoned Filer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Mar. 31, 2015		Dec. 31, 2014		Mar. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014		Mar. 31, 2014
ASSETS
Cash and Due From Banks	$37,941		$35,081		$40,056
Interest-Bearing Deposits at Banks	73,654		11,214		35,994
Investment Securities:
Available-for-Sale	393,133		366,139		429,230
Held-to-Maturity	305,175		302,024		317,632
Federal Home Loan Bank and Federal Reserve Bank Stock	4,806		4,851		3,896
Loans	1,434,794		1,413,268		1,310,423
Allowance for Loan Losses	-15,625		-15,570		-14,636
Net Loans	1,419,169		1,397,698		1,295,787
Premises and Equipment, Net	28,381		28,488		28,717
Goodwill	22,003		22,003		22,003
Other Intangible Assets, Net	3,489		3,625		3,996
Other Assets	47,777		46,297		44,270
Total Assets	2,335,528		2,217,420		2,221,581
LIABILITIES
Noninterest-Bearing Deposits	310,878		300,786		277,086
NOW Accounts	967,537		871,671		908,028
Savings Deposits	541,750		524,648		524,670
Time Deposits of $100,000 or More	59,886		61,797		74,127
Other Time Deposits	138,653		144,046		164,108
Total Deposits	2,018,704		1,902,948		1,948,019
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	15,895		19,421		13,787
Federal Home Loan Bank Overnight Advances	0		41,000		0
Federal Home Loan Bank Term Advances	50,000		10,000		20,000
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	20,000		20,000		20,000
Other Liabilities	25,964		23,125		25,284
Total Liabilities	2,130,563		2,016,494		2,027,090
STOCKHOLDERS' EQUITY
Preferred Stock
Common Stock	17,079		17,079		16,744
Additional Paid-in Capital	239,981		239,721		229,842
Retained Earnings	32,157		29,458		29,692
Unallocated ESOP Shares	-1,300		-1,450		-1,650
Accumulated Other Comprehensive Loss	-6,256	[1]	-7,166	[1]	-4,075	[1]
Treasury Stock, at Cost	-76,696		-76,716		-76,062
Total Stockholders' Equity	204,965		200,926		194,491
Total Liabilities and Stockholders' Equity	$2,335,528		$2,217,420		$2,221,581

[1]	All amounts are net of tax. Amounts in parentheses indicate debits.

Balance_Sheet_Parenthetical_Pa

Balance Sheet Parenthetical (Parentheticals) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Held-to-Maturity Securities, at Fair Value	$312,500	$308,566	$322,335
Preferred Stock, Par Value, in Dollars Per Share	$5	$5	$5
Preferred Stock, Shares Authorized, in Shares	1,000,000	1,000,000	1,000,000
Common Stock, Par Value, in Dollars Per Share	$1	$1	$1
Common Stock, Shares Authorized, in Shares	20,000,000	20,000,000	20,000,000
Common Stock, Shares Issued, in Shares	17,079,376	17,079,376	16,744,486
Unallocated ESOP Shares, in Shares	63,723	71,748	79,763
Treasury Stock, in Shares	4,380,293	4,386,001	4,315,156

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
INTEREST AND DIVIDEND INCOME
Interest and Fees on Loans	$13,650		$12,774
Interest on Deposits at Banks	21		13
Interest and Dividends on Investment Securities:
Fully Taxable	1,944		2,008
Exempt from Federal Taxes	1,375		1,471
Total Interest and Dividend Income	16,990		16,266
INTEREST EXPENSE
NOW Accounts	330		464
Savings Deposits	167		219
Time Deposits of $100,000 or More	90		230
Other Time Deposits	202		391
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	5		4
Federal Home Loan Bank Advances	150		145
Junior Subordinated Obligations Issued to Unconsolidated Subsidary Trusts	142		141
Total Interest Expense	1,086		1,594
NET INTEREST INCOME	15,904		14,672
Provision for Loan Losses	275		458
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	15,629		14,214
NONINTEREST INCOME
Income from Fiduciary Activities	1,933		1,873
Fees for Other Services to Customers	2,239		2,194
Insurance Commissions	2,139		2,444
Net Gain on Securities Transactions	90		0
Net Gains on Sale of Loans	132		123
Other Operating Income	323		252
Total Noninterest Income	6,856		6,886
NONINTEREST EXPENSE
Salaries and Employee Benefits	7,692		7,642
Occupancy Expense, Net	2,487		2,341
FDIC Assessments	280		273
Other Operating Expense	3,496		3,210
Total Noninterest Expense	13,955		13,466
INCOME BEFORE PROVISION FOR INCOME TAXES	8,530		7,634
Provision for Income Taxes	2,675		2,314
Net Income	$5,855		$5,320
Average Shares Outstanding:
Basic, in shares	12,633	[1]	12,601	[1]
Diluted, in shares	12,671	[1]	12,625	[1],[2]
Per Common Share:
Basic Earnings, in dollars per share	$0.46	[1]	$0.42	[1]
Diluted Earnings, in dollars per share	$0.46	[1]	$0.42	[1]

[1]	Share and Per Share Amounts have been restated for the September 2014 2% stock dividend.
[2]	All share and per share amounts have been adjusted for the September 2014 2% stock dividend

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Net Income	$5,855		$5,320
Other comprehensive income, before reclassifications, net of tax	745	[1]	241	[1]
Reclassification from Accumulated Other Comprehensive Income, net of tax	165	[1]	57	[1]
Other Comprehensive Income (Loss)	910		298
Comprehensive Income	6,765		5,618
Unrealized Gains and Losses on Available for Sale Securities [Member]
Other comprehensive income, before reclassifications, net of tax	745		241
Reclassification from Accumulated Other Comprehensive Income, net of tax	55		0
Amortization of Net Retirement Plan Actuarial Loss [Member]
Other comprehensive income, before reclassifications, net of tax	0	[1]	0	[1]
Reclassification from Accumulated Other Comprehensive Income, net of tax	117		70
Accretion of Net Retirement Plan Prior Service Credit [Member]
Other comprehensive income, before reclassifications, net of tax	0	[1]	0	[1]
Reclassification from Accumulated Other Comprehensive Income, net of tax	($7)		($13)

[1]	All amounts are net of tax. Amounts in parentheses indicate debits.

Consolidated_Statements_of_Sto

Consolidated Statements of Stockholders' Equity (USD $)		Total		Common Stock [Member]	Additional Paid-In Capital	Retained Earnings	Unallocated ESOP Shares	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
In Thousands, unless otherwise specified		Total		Common Stock [Member]	Additional Paid-In Capital	Retained Earnings	Unallocated ESOP Shares	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Stockholders' Equity, Beginning Balance at Dec. 31, 2013		$192,154		$16,744	$229,290	$27,457	($1,800)	($4,373)	($75,164)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		5,320		0	0	5,320	0	0	0
Other Comprehensive Income		298	[1]	0	0	0	0	298	0
Cash Dividends Paid	[2]	-3,085		0	0	-3,085	0	0	0
Stock Options Exercised, Net		474		0	284	0	0	0	190
Shares Issued Under the Employee Stock Purchase Plan		105		0	63	0	0	0	42
Stock-Based Compensation Expense		90		0	90	0	0	0	0
Tax Benefit for Disposition of Stock Options		5		0	5	0	0	0	0
Purchases of Treasury Stock		-1,165		0	0	0	0	0	-1,165
Acquisition of Subsidiaries		91		0	56	0	0	0	35
Allocation of ESOP Stock		204		0	-54	0	-150	0	0
Stockholders' Equity, Ending Balance at Mar. 31, 2014		194,491		16,744	229,842	29,692	-1,650	-4,075	-76,062
Stockholders' Equity, Beginning Balance at Dec. 31, 2014		200,926		17,079	239,721	29,458	-1,450	-7,166	-76,716
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		5,855		0	0	5,855	0	0	0
Other Comprehensive Income		910	[1]	0	0	0	0	910	0
Cash Dividends Paid	[2]	-3,156		0	0	-3,156	0	0	0
Stock Options Exercised, Net		70		0	40	0	0	0	30
Shares Issued Under the Directors' Stock Plan		11		0	7	0	0	0	4
Shares Issued Under the Employee Stock Purchase Plan		111		0	68	0	0	0	43
Stock-Based Compensation Expense		82		0	82	0	0	0	0
Purchases of Treasury Stock		-57		0	0	0	0	0	-57
Acquisition of Subsidiaries		0
Allocation of ESOP Stock		213		0	-63	0	-150	0	0
Stockholders' Equity, Ending Balance at Mar. 31, 2015		$204,965		$17,079	$239,981	$32,157	($1,300)	($6,256)	($76,696)

[1]	All amounts are net of tax. Amounts in parentheses indicate debits.
[2]	{F\|ahBzfndlYmZpbGluZ3MtaHJkcmoLEgZYTUxEb2MiXlhCUkxEb2NHZW5JbmZvOjIyYmVmZDk5YTk2MjRlYWY5OTdhODc1YzhlMTc5MGY3fFRleHRTZWxlY3Rpb246QjdBNEFEQTIzOTcyQjQ2NEJDQzA1QzFDREEzNjNGN0EM}

Stockholders_Equity_Parentheti

Stockholders Equity Parenthetical (Parentheticals) (USD $)	3 Months Ended
Stockholders Equity Parenthetical (Parentheticals) (USD $)	Mar. 31, 2015	Mar. 31, 2014
Cash Dividends Paid, per Share, in dollars per share	$0.25	$0.25
Stock Options Exercised, in shares	3,027	19,308
Shares Issued Under Directors Stock Plan, in shares	431	0
Shares Issued Under Employee Stock Purchase Plan, in shares	4,370	4,272
Purchase of Treasury Stock, in shares	2,120	45,608
Acquisition of Subsidiary, in shares	0	3,595
Allocation of ESOP Stock, in shares	8,025	7,878

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Cash Flows from Operating Activities:
Net Income	$5,855	$5,320
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Provision for Loan Losses	275	458
Depreciation and Amortization	1,626	1,965
Allocation of ESOP Stock	213	204
Gains on the Sale of Securities Available-for-Sale	-90	0
Loans Originated and Held-for-Sale	-3,970	-4,592
Proceeds from the Sale of Loans Held-for-Sale	3,674	4,277
Net Gains on the Sale of Loans	-132	-123
Net Losses on the Sale of Premises and Equipment, Other Real Estate Owned and Repossessed Assets	0	3
Contributions to Retirement Benefits Plans	-161	-261
Deferred Income Tax Benefit	538	-45
Shares Issued Under the Directors' Stock Plan	11	0
Stock-Based Compensation Expense	82	90
Net (Increase) Decrease in Other Assets	-2,420	-1,025
Net Increase (Decrease) in Other Liabilities	3,000	1,274
Net Cash Provided By Operating Activities	8,501	7,545
Cash Flows from Investing Activities:
Proceeds from the Sale of Securities Available-for-Sale	2,702	0
Proceeds from the Maturities and Calls of Securities Available-for-Sale	22,829	44,907
Purchases of Securities Available-for-Sale	-51,673	-16,905
Proceeds from the Maturities and Calls of Securities Held-to-Maturity	7,180	16,561
Purchases of Securities Held-to-Maturity	-10,655	-35,328
Net Increase in Loans	-21,712	-44,253
Proceeds from the Sales of Premises and Equipment, Other Real Estate Owned and Repossessed Assets	258	289
Purchase of Premises and Equipment	-373	-89
Cash Paid for Subsidiaries, Net	0	-75
Net Decrease in Other Investments	45	2,385
Net Cash Used In Investing Activities	-51,399	-32,508
Cash Flows from Financing Activities:
Net Increase in Deposits	115,756	105,689
Net Decrease in Short-Term Borrowings	-44,526	-50,990
Proceeds from Federal Home Loan Bank Borrowings	40,000	0
Purchase of Treasury Stock	-57	-1,165
Stock Options Exercised, Net	70	474
Shares Issued Under the Employee Stock Purchase Plan	111	105
Tax Benefit from Exercise of Stock Options	0	5
Cash Dividends Paid	-3,156	-3,085
Net Cash (Used In) Provided By Financing Activities	108,198	51,033
Net Increase in Cash and Cash Equivalents	65,300	26,070
Cash and Cash Equivalents at Beginning of Period	46,295	49,980
Cash and Cash Equivalents at End of Period	111,595	76,050
Supplemental Disclosures to Statements of Cash Flow Information:
Interest on Deposits and Borrowings	1,080	1,628
Income Taxes	635	335
Non-cash Investing and Financing Activity:
Transfer of Loans to Other Real Estate Owned and Repossessed Assets	394	484
Acquisition of Subsidiaries	$0	$91

Summary_of_Significant_Account

Summary of Significant Accounting Policies	3 Months Ended
Summary of Significant Accounting Policies	Mar. 31, 2015
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]	ACCOUNTING POLICIES

	In the opinion of the management of Arrow Financial Corporation (Arrow), the accompanying unaudited consolidated interim financial statements contain all of the adjustments necessary to present fairly the financial position as of March 31, 2015, December 31, 2014 and March 31, 2014; the results of operations for the three-month periods ended March 31, 2015 and 2014; the consolidated statements of comprehensive income for the three-month periods ended March 31, 2015 and 2014; the changes in stockholders' equity for the three-month periods ended March 31, 2015 and 2014; and the cash flows for the three-month periods ended March 31, 2015 and 2014. All such adjustments are of a normal recurring nature. Certain prior period amounts have been reclassified to conform to the current presentation. The preparation of financial statements requires the use of management estimates. The unaudited consolidated interim financial statements should be read in conjunction with the audited annual consolidated financial statements of Arrow for the year ended December 31, 2014, included in Arrow's 2014 Form 10-K.

	New Accounting Standards Updates (ASU): During 2015, through the date of this report, the FASB issued five accounting standards updates, none of which had an immediate impact on Arrow, but could in the future.
	ASU 2015-01 "Income Statement - Extraordinary and Unusual Items" eliminated the concept of extraordinary items. For Arrow, the standard is effective for the first quarter of 2016.
	ASU 2015-02 "Consolidation" changed the analysis that a reporting entity must perform to determine whether it should consolidate certain types of legal entities. For Arrow, the standard is effective for the first quarter of 2016.
	ASU 2015-03 "Interest - Imputation of Interest" required debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability. There were no changes to the recognition and measurement of debt issuance costs. For Arrow, the standard is effective for the first quarter of 2016.
	ASU 2015-04 "Compensation-Retirement Benefits" provides several practical expedients for the measurement or, in certain circumstances, the remeasurement of defined benefit plan assets and obligations. Most of the practical expedients will not apply to Arrow, however, if used, an entity must disclose the accounting policy election and the date used to measure defined benefit plan assets and obligations. For Arrow, the standard is effective for the first quarter of 2016.
	ASU 2015-05 "Intangibles - Goodwill and Other - Internal use Software" provides guidance to customers about whether a cloud computing arrangement includes a software license. If a cloud computing arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. For Arrow, the standard is effective for the first quarter of 2016.

Investment_Securities

Investment Securities	3 Months Ended
	Mar. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]	INVESTMENT SECURITIES (In Thousands)

	The following table is the schedule of Available-For-Sale Securities at March 31, 2015, December 31, 2014 and March 31, 2014:


	Available-For-Sale Securities
			U.S. Agency			State and			Mortgage-			Corporate			Mutual Funds			Total
			Obligations			Municipal			Backed			and Other			and Equity			Available-
						Obligations			Securities -			Debt			Securities			For-Sale
									Residential			Securities						Securities
	March 31, 2015
	Available-For-Sale Securities,		$	150,500		$	73,886		$	145,185		$	16,949		$	1,120		$	387,640
	at Amortized Cost
	Available-For-Sale Securities,		151,527			74,095			149,510			16,756			1,245			393,133
	at Fair Value
	Gross Unrealized Gains		1,049			217			4,325			19			125			5,735

	Gross Unrealized Losses		22			9			—			212			—			243

	Available-For-Sale Securities,																	284,708
	Pledged as Collateral

	Maturities of Debt Securities,
	at Amortized Cost:
	Within One Year		5,000			23,532			1,515			4,938						34,985

	From 1 - 5 Years		145,500			48,471			122,340			11,010						327,321

	From 5 - 10 Years		—			1,243			21,330			—						22,573

	Over 10 Years		—			640			—			1,000						1,640


	Maturities of Debt Securities,
	at Fair Value:
	Within One Year		5,005			23,573			1,532			4,947						35,057

	From 1 - 5 Years		146,522			48,638			125,850			11,009						332,019

	From 5 - 10 Years		—			1,244			22,128			—						23,372

	Over 10 Years		—			640			—			800						1,440



	Available-For-Sale Securities
			U.S. Agency			State and			Mortgage-			Corporate			Mutual Funds			Total
			Obligations			Municipal			Backed			and Other			and Equity			Available-
						Obligations			Securities -			Debt			Securities			For-Sale
									Residential			Securities						Securities

	Securities in a Continuous
	Loss Position, at Fair Value:
	Less than 12 Months		$	—		$	—		$	—		$	—		$	—		$	—

	12 Months or Longer		13,937			6,581			22			5,702			—			26,242

	Total		$	13,937		$	6,581		$	22		$	5,702		$	—		$	26,242

	Number of Securities in a		46			7			31			22			—			106
	Continuous Loss Position

	Unrealized Losses on
	Securities in a Continuous
Loss Position:
Less than 12 Months		$	—		$	—		$	—		$	—		$	—		$	—

12 Months or Longer		22			9			—			212			—			243

Total		$	22		$	9		$	—		$	212		$	—		$	243


December 31, 2014
Available-For-Sale Securities,		$	137,540		$	81,582		$	124,732		$	16,988		$	1,120		$	361,962
at Amortized Cost
Available-For-Sale Securities,		137,603			81,730			128,827			16,725			1,254			366,139
at Fair Value
Gross Unrealized Gains		208			187			4,100			7			134			4,636

Gross Unrealized Losses		145			39			5			270			—			459

Available-For-Sale Securities,																	267,384
Pledged as Collateral

Securities in a Continuous
Loss Position, at Fair Value:
Less than 12 Months		$	39,631		$	3,309		$	82		$	—		$	—		$	43,022

12 Months or Longer		28,020			14,035			1,546			10,738			—			54,339

Total		$	67,651		$	17,344		$	1,628		$	10,738		$	—		$	97,361

Number of Securities in a		22			65			3			15			—			105
Continuous Loss Position

Unrealized Losses on
Securities in a Continuous
Loss Position:
Less than 12 Months		$	48		$	—		$	—		$	—		$	—		$	48

12 Months or Longer		97			39			5			270			—			411

Total		$	145		$	39		$	5		$	270		$	—		$	459


March 31, 2014
Available-For-Sale Securities,		$	121,477		$	125,165		$	160,023		$	17,115		$	1,120		$	424,900
at Amortized Cost
Available-For-Sale Securities,		121,220			125,410			164,541			16,839			1,220			429,230
at Fair Value
Gross Unrealized Gains		3			333			4,616			14			100			5,066

Gross Unrealized Losses		260			88			98			290			—			736

Available-For-Sale Securities,																	329,039
Pledged as Collateral

Securities in a Continuous
Loss Position, at Fair Value:
Less than 12 Months		$	50,778		$	17,937		$	10,613		$	5,868		$	—		$	85,196

12 Months or Longer		6,124			3,653			4,063			3,392			—			17,232

Total		$	56,902		$	21,590		$	14,676		$	9,260		$	—		$	102,428



Available-For-Sale Securities
		U.S. Agency			State and			Mortgage-			Corporate			Mutual Funds			Total
		Obligations			Municipal			Backed			and Other			and Equity			Available-
					Obligations			Securities -			Debt			Securities			For-Sale
								Residential			Securities						Securities
Number of Securities in a		16			87			9			13			—			125
Continuous Loss Position

Unrealized Losses on
Securities in a Continuous
Loss Position:
Less than 12 Months		$	222		$	72		$	81		$	50		$	—		$	425

12 Months or Longer		38			16			17			240			—			311

Total		$	260		$	88		$	98		$	290		$	—		$	736



The following table is the schedule of Held-To-Maturity Securities at March 31, 2015, December 31, 2014 and March 31, 2014:


Held-To-Maturity Securities
		State and			Mortgage-			Corporate			Total
		Municipal			Backed			and Other			Held-To
		Obligations			Securities -			Debt			Maturity
					Residential			Securities			Securities
March 31, 2015
Held-To-Maturity Securities,		$	195,951		$	108,224		$	1,000		$	305,175
at Amortized Cost
Held-To-Maturity Securities,		200,578			110,922			1,000			312,500
at Fair Value
Gross Unrealized Gains		4,753			2,698			—			7,451

Gross Unrealized Losses		126			—			—			126

Held-To-Maturity Securities,											285,132
Pledged as Collateral

Maturities of Debt Securities,
at Amortized Cost:
Within One Year		35,926			—			—			35,926

From 1 - 5 Years		89,022			43,820			—			132,842

From 5 - 10 Years		67,708			64,404			—			132,112

Over 10 Years		3,295			—			1,000			4,295


Maturities of Debt Securities,
at Fair Value:
Within One Year		35,968			—			—			35,968

From 1 - 5 Years		91,192			44,816			—			136,008

From 5 - 10 Years		70,047			66,106			—			136,153

Over 10 Years		3,371			—			1,000			4,371


Securities in a Continuous
Loss Position, at Fair Value:
Less than 12 Months		$	—		$	—		$	—		$	—

12 Months or Longer		16,010			—			—			16,010

Total		$	16,010		$	—		$	—		$	16,010

Number of Securities in a		585			7			—			592
Continuous Loss Position

Unrealized Losses on
Securities in a Continuous
Loss Position:
Less than 12 Months		$	—		$	—		$	—		$	—

12 Months or Longer		126			—			—			126

Total		$	126		$	—		$	—		$	126




Held-To-Maturity Securities
		State and			Mortgage-			Corporate			Total
		Municipal			Backed			and Other			Held-To
		Obligations			Securities -			Debt			Maturity
					Residential			Securities			Securities
December 31, 2014
Held-To-Maturity Securities,		$	188,472		$	112,552		$	1,000		$	302,024
at Amortized Cost
Held-To-Maturity Securities,		193,252			114,314			1,000			308,566
at Fair Value
Gross Unrealized Gains		4,935			1,770			—			6,705

Gross Unrealized Losses		155			8			—			163

Held-To-Maturity Securities,											282,640
Pledged as Collateral

Securities in a Continuous
Loss Position, at Fair Value:
Less than 12 Months		$	2,143		$	4,581		$	—		$	6,724

12 Months or Longer		16,033			—			—			16,033

Total		$	18,176		$	4,581		$	—		$	22,757

Number of Securities in a		74			1			—			75
Continuous Loss Position

Unrealized Losses on
Securities in a Continuous
Loss Position:
Less than 12 Months		$	17		$	8		$	—		$	25

12 Months or Longer		138			—			—			138

Total		$	155		$	8		$	—		$	163



March 31, 2014
Held-To-Maturity Securities,		$	190,847		$	125,785		$	1,000		$	317,632
at Amortized Cost
Held-To-Maturity Securities,		195,524			125,811			1,000			322,335
at Fair Value
Gross Unrealized Gains		5,042			274			—			5,316

Gross Unrealized Losses		365			248			—			613

Held-To-Maturity Securities,											316,632
Pledged as Collateral

Securities in a Continuous
Loss Position, at Fair Value:
Less than 12 Months		$	19,696		$	43,049		$	—		$	62,745

12 Months or Longer		5,112			—			—			5,112

Total		$	24,808		$	43,049		$	—		$	67,857

Number of Securities in a		86			17			—			103
Continuous Loss Position

Unrealized Losses on
Securities in a Continuous
Loss Position:
Less than 12 Months		$	324		$	248		$	—		$	572

12 Months or Longer		41			—			—			41

Total		$	365		$	248		$	—		$	613




In the tables above, maturities of mortgage-backed-securities - residential are included based on their expected average lives. Actual maturities will differ from the table below because issuers may have the right to call or prepay obligations with or without prepayment penalties.

In the available-for-sale category at March 31, 2015, U.S. agency obligations consisted solely of U.S. Government Agency securities with an amortized cost of $150.5 million and a fair value of $151.5 million. Mortgage-backed securities - residential consisted of U.S. Government Agency securities with an amortized cost of $34.1 million and a fair value of $35.0 million and government sponsored entity (GSE) securities with an amortized cost of $111.1 million and a fair value of $114.5 million. In the held-to-maturity category at March 31, 2015, mortgage-backed securities-residential consisted of U.S Government Agency securities with an amortized cost of $29.9 million and a fair value of $30.6 million and GSE securities with an amortized cost of $78.3 million and a fair value of $80.3 million.
In the available-for-sale category at December 31, 2014, U.S. agency obligations consisted solely of U.S. Government Agency securities with an amortized cost of $137.5 million and a fair value of $137.6 million. Mortgage-backed securities-residential consisted of U.S. Government Agency securities with an amortized cost of $23.0 million and a fair value of $23.6 million and GSE securities with an amortized cost of $101.7 million and a fair value of $105.2 million. In the held-to-maturity category at December 31, 2014, mortgage-backed securities-residential consisted of U.S. Government Agency securities with an amortized cost of $4.4 million and a fair value of $4.5 million and GSE securities with an amortized cost of $108.1 million and a fair value of $109.8 million.
In the available-for-sale category at March 31, 2014, U.S. agency obligations consisted solely of U.S. Government Agency securities with an amortized cost of $121.5 million and a fair value of $121.2 million. Mortgage-backed securities-residential consisted of US Government Agency securities with an amortized cost of $30.6 million and a fair value of $31.3 million and GSE securities with an amortized cost of $129.4 million and a fair value of $133.2 million. In the held-to-maturity category at March 31, 2014, mortgage-backed securities-residential consisted of U.S. Government Agency securities with an amortized cost of $4.8 million and a fair value of $4.8 million and GSE securities with an amortized cost of $121.0 million and a fair value of $121.0 million.
Securities in a continuous loss position, in the tables above for March 31, 2015, December 31, 2014 and March 31, 2014, do not reflect any deterioration of the credit worthiness of the issuing entities. U.S. Agency issues, including agency-backed collateralized mortgage obligations and mortgage-backed securities, are all rated at least Aaa by Moody's or AA+ by Standard and Poor's. The state and municipal obligations are general obligations supported by the general taxing authority of the issuer, and in some cases are insured. Obligations issued by school districts are supported by state aid. For any non-rated municipal securities, credit analysis is performed in-house based upon data that has been submitted by the issuers to the NY State Comptroller. That analysis reflects satisfactory credit worthiness of the municipalities. Corporate and other debt securities continue to be rated above investment grade according to Moody's and Standard and Poor's. Subsequent to March 31, 2015, and through the date of filing this report, there were no securities downgraded below investment grade.
The unrealized losses on these temporarily impaired securities are primarily the result of changes in interest rates for fixed rate securities where the interest rate received is less than the current rate available for new offerings of similar securities, changes in market spreads as a result of shifts in supply and demand, and/or changes in the level of prepayments for mortgage related securities. Because we do not currently intend to sell any of our temporarily impaired securities, and because it is not more likely-than-not that we would be required to sell the securities prior to recovery, the impairment is considered temporary.

Loans

Loans	3 Months Ended
	Mar. 31, 2015
Loans and Leases Receivable Disclosure [Abstract]
Financing Receivables [Text Block]	LOANS (In Thousands)

	Loan Categories and Past Due Loans

	The following table presents loan balances outstanding as of March 31, 2015, December 31, 2014 and March 31, 2014 and an analysis of the recorded investment in loans that are past due at these dates. Generally, Arrow considers a loan past due 30 or more days if the borrower is two or more payments past due. Loans held-for-sale of $828, $398 and $502 as of March 31, 2015, December 31, 2014 and March 31, 2014, respectively, are included in the residential real estate balances for current loans.




					Commercial
		Commercial			Real Estate			Consumer			Residential			Total
	March 31, 2015
	Loans Past Due 30-59 Days	$	370		$	255		$	3,357		$	2,205		$	6,187

	Loans Past Due 60-89 Days	48			—			428			519			995

	Loans Past Due 90 or more Days	284			1,838			147			2,707			4,976

	Total Loans Past Due	702			2,093			3,932			5,431			12,158

	Current Loans	99,208			337,194			436,970			549,264			1,422,636

	Total Loans	$	99,910		$	339,287		$	440,902		$	554,695		$	1,434,794


	Loans 90 or More Days Past Due	$	—		$	—		$	—		$	580		$	580
	and Still Accruing Interest
	Nonaccrual Loans	$	409		$	2,070		$	337		$	4,182		$	6,998


	December 31, 2014
	Loans Past Due 30-59 Days	$	124		$	432		$	4,167		$	482		$	5,205

	Loans Past Due 60-89 Days	154			7			1,225			1,495			2,881

	Loans Past Due 90 or more Days	345			1,832			206			2,999			5,382

	Total Loans Past Due	623			2,271			5,598			4,976			13,468

	Current Loans	98,888			337,841			431,443			531,628			1,399,800

	Total Loans	$	99,511		$	340,112		$	437,041		$	536,604		$	1,413,268


	Loans 90 or More Days Past Due	$	—		$	—		$	—		$	537		$	537
	and Still Accruing Interest
	Nonaccrual Loans	$	473		$	2,071		$	415		$	3,940		$	6,899


	March 31, 2014
	Loans Past Due 30-59 Days	$	597		$	1,381		$	2,714		$	2,026		$	6,718

	Loans Past Due 60-89 Days	579			237			528			438			1,782

	Loans Past Due 90 or more Days	29			1,785			150			2,244			4,208

	Total Loans Past Due	1,205			3,403			3,392			4,708			12,708

	Current Loans	88,671			333,464			405,012			470,568			1,297,715

	Total Loans	$	89,876		$	336,867		$	408,404		$	475,276		$	1,310,423


	Loans 90 or More Days Past Due	$	—		$	—		$	—		$	347		$	347
and Still Accruing Interest
Nonaccrual Loans	$	182		$	2,042		$	372		$	3,687		$	6,283



The Company disaggregates its loan portfolio into the following four categories:

Commercial - The Company offers a variety of loan options to meet the specific needs of our commercial customers including term loans, time notes and lines of credit. Such loans are made available to businesses for working capital needs such as inventory and receivables, business expansion and equipment purchases. Generally, a collateral lien is placed on equipment or other assets owned by the borrower. These loans carry a higher risk than commercial real estate loans due to the nature of the underlying collateral, which can be business assets such as equipment and accounts receivable and generally have a lower liquidation value than real estate. In the event of default by the borrower, the Company may be required to liquidate collateral at deeply discounted values. To reduce the risk, management usually obtains personal guarantees of the borrowers. In addition, the Company offers commercial construction and land development loans to finance projects, primarily within the communities that we serve. Many projects will ultimately be used by the borrowers’ businesses, while others are developed for resale. These real estate loans are secured by first liens on the real estate, which may include apartments, commercial structures, housing businesses, healthcare facilities, and both owner-occupied and non-owner-occupied facilities. There is enhanced risk during the construction period, since the loan is secured by an incomplete project.

Commercial Real Estate - The Company offers commercial real estate loans to finance real estate purchases, refinancings, expansions and improvements to commercial properties. Commercial real estate loans are made to finance the purchases of real property which generally consists of real estate with completed structures. These commercial real estate loans are secured by first liens on the real estate, which may include apartments, commercial structures, housing businesses, healthcare facilities, and both owner and non owner-occupied facilities. These loans are typically less risky than commercial loans, since they are secured by real estate and buildings, and are generally originated in amounts of no more than 80% of the appraised value of the property. However, the Company also offers commercial construction and land development loans to finance projects, primarily within the communities that we serve. Many projects will ultimately be used bye the borrowers' businesses, while others are developed for resale. These real estate loans are also secured by first liens on the real estate, which may include apartments, commercial structures, housing business, healthcare facilities and both owner-occupied and non-owner-occupied facilities. There is enhanced risk during the construction period, since the loan is secured by an incomplete project.

Consumer Loans - The Company offers a variety of consumer installment loans to finance personal expenditures. Most of these loans carry a fixed rate of interest with principal repayment terms typically ranging from one to five years, based upon the nature of the collateral and the size of the loan. In addition to installment loans, the Company also offers personal lines of credit and overdraft protection. Several loans are unsecured, which carry a higher risk of loss. Also included in this category are automobile loans. The Company primarily finances the purchases of automobiles indirectly through dealer relationships located throughout upstate New York and Vermont. Most of these loans carry a fixed rate of interest with principal repayment terms typically ranging from three to seven years. Indirect consumer loans are underwritten on a secured basis using the underlying collateral being financed.

Residential Real Estate Mortgages - Residential real estate loans consist primarily of loans secured by first or second mortgages on primary residences. We originate adjustable-rate and fixed-rate one-to-four-family residential real estate loans for the construction, purchase or refinancing of an existing mortgage. These loans are collateralized primarily by owner-occupied properties generally located in the Company’s market area. Loans on one-to-four-family residential real estate are generally originated in amounts of no more than 85% of the purchase price or appraised value (whichever is lower), or have private mortgage insurance. The Company’s underwriting analysis for residential mortgage loans typically includes credit verification, independent appraisals, and a review of the borrower’s financial condition. Mortgage title insurance and hazard insurance are normally required. It is our general practice to underwrite our residential real estate loans to secondary market standards. Construction loans have a unique risk, because they are secured by an incomplete dwelling. This risk is reduced through periodic site inspections, including one at each loan draw period. In addition, the Company offers fixed home equity loans as well as home equity lines of credit to consumers to finance home improvements, debt consolidation, education and other uses. Our policy allows for a maximum loan to value ratio of 80%, although periodically higher advances are allowed. The Company originates home equity lines of credit and second mortgage loans (loans secured by a second junior lien position on one-to-four-family residential real estate). Risk is generally reduced through underwriting criteria, which include credit verification, appraisals, a review of the borrower's financial condition, and personal cash flows. A security interest, with title insurance when necessary, is taken in the underlying real estate.

Allowance for Loan Losses

The following table presents a roll-forward of the allowance for loan losses and other information pertaining to the allowance for loan losses:


Allowance for Loan Losses
				Commercial
	Commercial			Real Estate			Consumer			Residential			Unallocated			Total
Roll-forward of the Allowance for Loan Losses for the Year-to-Date Periods:
December 31, 2014	$	2,100		$	4,128		$	5,210		$	3,369		$	763		$	15,570

Charge-offs	(16		)	—			(185		)	(89		)	—			(290		)

Recoveries	7			—			63			—			—			70

Provision	72			(295		)	179			349			(30		)	275

March 31, 2015	$	2,163		$	3,833		$	5,267		$	3,629		$	733		$	15,625


31-Dec-13	$	1,886		$	3,962		$	4,478		$	3,026		$	1,082		$	14,434

Charge-offs	(123		)	—			(197		)	(16		)	—			(336		)

Recoveries	19			—			61			—			—			80

Provision	15			236			244			67			(104		)	458

March 31, 2014	$	1,797		$	4,198		$	4,586		$	3,077		$	978		$	14,636




Allowance for Loan Losses
				Commercial
	Commercial			Real Estate			Consumer			Residential			Unallocated			Total
March 31, 2015
Allowance for loan losses - Loans Individually Evaluated for Impairment	$	—		$	—		$	—		$	149		$	—		$	149

Allowance for loan losses - Loans Collectively Evaluated for Impairment	$	2,163		$	3,833		$	5,267		$	3,480		$	733		$	15,476

Ending Loan Balance - Individually Evaluated for Impairment	$	459		$	1,492		$	107		$	2,296		$	—		$	4,354

Ending Loan Balance - Collectively Evaluated for Impairment	$	99,451		$	337,795		$	440,795		$	552,399		$	—		$	1,430,440


December 31, 2014
Allowance for loan losses - Loans Individually Evaluated for Impairment	$	—		$	—		$	—		$	109		$	—		$	109

Allowance for loan losses - Loans Collectively Evaluated for Impairment	$	2,100		$	4,128		$	5,210		$	3,260		$	763		$	15,461

Ending Loan Balance - Individually Evaluated for Impairment	$	494		$	1,492		$	118		$	2,237		$	—		$	4,341

Ending Loan Balance - Collectively Evaluated for Impairment	$	99,017		$	338,620		$	436,923		$	534,367		$	—		$	1,408,927


March 31, 2014
Allowance for loan losses - Loans Individually Evaluated for Impairment	$	—		$	—		$	—		$	—		$	—		$	—

Allowance for loan losses - Loans Collectively Evaluated for Impairment	$	1,797		$	4,198		$	4,586		$	3,077		$	978		$	14,636

Ending Loan Balance - Individually Evaluated for Impairment	$	214		$	1,810		$	144		$	1,913		$	—		$	4,081

Ending Loan Balance - Collectively Evaluated for Impairment	$	89,662		$	335,057		$	408,260		$	473,363		$	—		$	1,306,342


Through the provision for loan losses, an allowance for loan losses is maintained that reflects our best estimate of the inherent risk of loss in the Company’s loan portfolio as of the balance sheet date. Additions are made to the allowance for loan losses through a periodic provision for loan losses. Actual loan losses are charged against the allowance for loan losses when loans are deemed uncollectible and recoveries of amounts previously charged off are recorded as credits to the allowance for loan losses.
Our loan officers and risk managers meet at least quarterly to discuss and review the conditions and risks associated with certain criticized and classified commercial-related relationships. In addition, our independent internal loan review department performs periodic reviews of the risk ratings on individual loans in our commercial loan portfolio.
We use a two-step process to determine the provision for loan losses and the amount of the allowance for loan losses. We measure impairment on our impaired loans on a quarterly basis. Our impaired loans are generally nonaccrual loans over $250 thousand and all troubled debt restructured loans. Our impaired loans are generally considered to be collateral dependent with the specific reserve, if any, determined based on the value of the collateral less estimated costs to sell.
The remainder of the portfolio is evaluated on a pooled basis. For each homogeneous loan pool, we estimate a total loss factor based on the historical net loss rates adjusted for applicable qualitative factors. We update the total loss factors assigned to each loan category on a quarterly basis. For the commercial, commercial construction, and commercial real estate categories, we further segregate the loan categories by credit risk profile (pools of loans graded satisfactory, special mention and substandard). Additional description of the credit risk classifications is detailed in the Credit Quality Indicators section of this note.
We determine the annualized historical net loss rate for each loan category using a trailing three-year net charge-off average. While historical net loss experience provides a reasonable starting point for our analysis, historical net losses, or even recent trends in net losses, do not by themselves form a sufficient basis to determine the appropriate level of the allowance for loan losses. Therefore, we also consider and adjust historical net loss factors for qualitative factors that impact the inherent risk of loss associated with our loan categories within our total loan portfolio. These include:

•	Changes in the volume and severity of past due, nonaccrual and adversely classified loans

•	Changes in the nature and volume of the portfolio and in the terms of loans

•	Changes in the value of the underlying collateral for collateral dependent loans

•	Changes in lending policies and procedures, including changes in underwriting standards and collection, charge-off, and recovery practices not considered elsewhere in estimating credit losses

•	Changes in the quality of the loan review system

•	Changes in the experience, ability, and depth of lending management and other relevant staff

•	Changes in international, national, regional, and local economic and business conditions and developments that affect the collectibility of the portfolio

•	The existence and effect of any concentrations of credit, and changes in the level of such concentrations

•	The effect of other external factors such as competition and legal and regulatory requirements on the level of estimated credit losses in the existing portfolio or pool
Further, due to the imprecise nature of the loan loss estimation process, the risk attributes of our loan portfolio may not be fully captured in data related to the determination of loss factors used to determine our analysis of the adequacy of the allowance for loan losses. Management, therefore, has established an unallocated portion within the allowance for loan losses reflecting the imprecision that naturally exists in the allowance for loan loss estimation process. The unallocated allowance for loan losses is not considered a significant component of the overall allowance for loan loss estimation process.

























Credit Quality Indicators

The following table presents the credit quality indicators by loan category at March 31, 2015, December 31, 2014 and March 31, 2014:


Loan Credit Quality Indicators
				Commercial
	Commercial			Real Estate			Consumer			Residential			Total
March 31, 2015
Credit Risk Profile by Creditworthiness Category:
Satisfactory	$	85,597		$	317,590								$	403,187

Special Mention	2,575			2,849									5,424

Substandard	11,738			18,848									30,586

Doubtful	—			—									—

Credit Risk Profile Based on Payment Activity:
Performing							$	440,565		$	549,932		990,497

Nonperforming							337			4,763			5,100


December 31, 2014
Credit Risk Profile by Creditworthiness Category:
Satisfactory	85,949			317,747									403,696

Special Mention	2,442			3,718									6,160

Substandard	11,120			18,647									29,767

Doubtful	—			—									—

Credit Risk Profile Based on Payment Activity:
Performing							436,626			532,127			968,753

Nonperforming							415			4,477			4,892


March 31, 2014
Credit Risk Profile by Creditworthiness Category:
Satisfactory	82,263			315,558									397,821

Special Mention	960			614									1,574

Substandard	6,653			20,695									27,348

Doubtful	—			—									—

Credit Risk Profile Based on Payment Activity:
Performing							408,031			471,242			879,273

Nonperforming							373			4,034			4,407


We use an internally developed system of five credit quality indicators to rate the credit worthiness of each commercial loan defined as follows: 1) Satisfactory - "Satisfactory" borrowers have acceptable financial condition with satisfactory record of earnings and sufficient historical and projected cash flow to service the debt. Borrowers have satisfactory repayment histories and primary and secondary sources of repayment can be clearly identified; 2) Special Mention - Loans in this category have potential weaknesses that deserve management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the asset or in the institution’s credit position at some future date. "Special mention" assets are not adversely classified and do not expose an institution to sufficient risk to warrant adverse classification. Loans which might be assigned this risk rating include loans to borrowers with deteriorating financial strength and/or earnings record and loans with potential for problems due to weakening economic or market conditions; 3) Substandard - Loans classified as “substandard” are inadequately protected by the current sound net worth or paying capacity of the borrower or the collateral pledged, if any. Loans in this category have well defined weaknesses that jeopardize the repayment. They are characterized by the distinct possibility that the bank will sustain some loss if the deficiencies are not corrected. “Substandard” loans may include loans which are likely to require liquidation of collateral to effect repayment, and other loans where character or ability to repay has become suspect. Loss potential, while existing in the aggregate amount of substandard assets, does not have to exist in individual assets classified substandard; 4) Doubtful - Loans classified as “doubtful” have all of the weaknesses inherent in those classified as “substandard” with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of current existing facts, conditions, and values highly questionable and improbable. Although possibility of loss is extremely high, classification of these loans as “loss” has been deferred due to specific pending factors or events which may strengthen the value (i.e. possibility of additional collateral, injection of capital, collateral liquidation, debt restructure, economic recovery, etc). Loans classified as “doubtful” need to be placed on non-accrual; and 5) Loss - Loans classified as “loss” are considered uncollectible and of such little value that their continuance as bankable assets is not warranted. As of the date of the balance sheet, all loans in this category have been charged-off to the allowance for loan losses. Large commercial loans are evaluated on an annual basis, unless the credit quality indicator falls to a level of "substandard" or below, when the loan is evaluated quarterly. The credit quality indicator is one of the factors used to determine any loss, as further described in this footnote.
For the purposes of the table above, nonperforming consumer loans are those loans on nonaccrual status or are 90 days or more past due and still accruing interest.

Impaired Loans
The following table presents information on impaired loans based on whether the impaired loan has a recorded related allowance or has no recorded related allowance:


Impaired Loans
				Commercial
	Commercial			Real Estate			Consumer			Residential			Total
March 31, 2015

Recorded Investment:
With No Related Allowance	$	459		$	1,492		$	107		$	1,697		$	3,755

With a Related Allowance	—			—			—			599			599

Unpaid Principal Balance:
With No Related Allowance	459			1,492			107			1,697			3,755

With a Related Allowance	—			—			—			599			599


December 31, 2014

Recorded Investment:
With No Related Allowance	$	494		$	1,492		$	118		$	1,678		$	3,782

With a Related Allowance	—			—			—			559			559

Unpaid Principal Balance:
With No Related Allowance	494			1,492			118			1,678			3,782

With a Related Allowance	—			—			—			559			559


March 31, 2014
Recorded Investment:
With No Related Allowance	$	214		$	1,810		$	144		$	1,913		$	4,081

With a Related Allowance	—			—			—			—			—

Unpaid Principal Balance:
With No Related Allowance	214			1,810			144			1,913			$	4,081

With a Related Allowance	—			—			—			—			—


For the Year-To-Date Period Ended:
March 31, 2015
Average Recorded Balance:

With No Related Allowance	$	477		$	1,492		$	113		$	1,688		$	3,770

With a Related Allowance	—			—			—			579			579

Interest Income Recognized:
With No Related Allowance	2			—			1			1			4

With a Related Allowance	—			—			—			—			—

Cash Basis Income:
With No Related Allowance	—			—			—			—			—

With a Related Allowance	—			—			—			—			—


March 31, 2014
Average Recorded Balance:
With No Related Allowance	$	218		$	1,798		$	159		$	2,111		$	4,286

With a Related Allowance	—			—			—			—			—

Interest Income Recognized:
With No Related Allowance	3			10			2			1			16

With a Related Allowance	—			—			—			—			—

Cash Basis Income:
With No Related Allowance	—			—			—			—			—

With a Related Allowance	—			—			—			—			—


At March 31, 2015, December 31, 2014 and March 31, 2014, all impaired loans were considered to be collateral dependent and were therefore evaluated for impairment based on the fair value of collateral less estimated cost to sell. Interest income recognized in the table above, represents income earned after the loans became impaired and includes restructured loans in compliance with their modified terms and nonaccrual loans where we have recognized interest income on a cash basis.

Loans Modified in Trouble Debt Restructurings

The following table presents information on loans modified in trouble debt restructurings during the periods indicated. All loans were modified under Arrow's own programs. The principal modification, for all the modifications in the table below, involved payment deferrals.


Loans Modified in Trouble Debt Restructurings During the Period
				Commercial
	Commercial			Real Estate			Consumer			Residential			Total
For the Year-To-Date Period Ended:
March 31, 2015
Number of Loans	—			—			1			—			1

Pre-Modification Outstanding Recorded Investment	$	—		$	—		$	2		$	—		$	2

Post-Modification Outstanding Recorded Investment	$	—		$	—		$	2		$	—		$	2


March 31, 2014
Number of Loans	—			—			1			—			1

Pre-Modification Outstanding Recorded Investment	$	—		$	—		$	2		$	—		$	2

Post-Modification Outstanding Recorded Investment	$	—		$	—		$	2		$	—		$	2


In general, loans requiring modification are restructured to accommodate the projected cashflows of the borrower. No loans modified during the preceding twelve months subsequently defaulted as of March 31, 2015.

Guarantees

Guarantees	3 Months Ended
	Mar. 31, 2015
Guarantees [Abstract]
Guarantees [Text Block]	GUARANTEES (In Thousands)

	The following table presents the balance for standby letters of credit for the periods ended March 31, 2015, December 31, 2014 and March 31, 2014:


	Loan Commitments and Letters of Credit
		March 31, 2015		December 31, 2014		March 31, 2014
	Notional Amount:
	Commitments to Extend Credit	$	259,634	$	249,803	$	235,549

	Standby Letters of Credit	3,193		3,317		3,333

	Fair Value:
	Commitments to Extend Credit	$	—	$	—	$	—

	Standby Letters of Credit	37		39		56



	Arrow is party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit. Commitments to extend credit include home equity lines of credit, commitments for residential and commercial construction loans and other personal and commercial lines of credit. These instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the consolidated balance sheets. The contract or notional amounts of those instruments reflect the extent of the involvement Arrow has in particular classes of financial instruments.
	Arrow's exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit and standby letters of credit is represented by the contractual notional amount of those instruments. Arrow uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments.
	Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. Arrow evaluates each customer's creditworthiness on a case-by-case basis. Home equity lines of credit are secured by residential real estate. Construction commitments are secured by underlying real estate. For other lines of credit, the amount of collateral obtained, if deemed necessary by Arrow upon extension of credit, is based on management's credit evaluation of the counterparty. Collateral held varies, but may include accounts receivable, inventory, property, plant and equipment, and income-producing commercial properties. Most of the commitments are variable rate instruments.
	Arrow has issued conditional commitments in the form of standby letters of credit to guarantee payment on behalf of a customer and guarantee the performance of a customer to a third party. Standby letters of credit generally arise in connection with lending relationships. The credit risk involved in issuing these instruments is essentially the same as that involved in extending loans to customers. Contingent obligations under standby letters of credit at March 31, 2015, December 31, 2014 and March 31, 2014 represent the maximum potential future payments Arrow could be required to make. Typically, these instruments have terms of 12 months or less and expire unused; therefore, the total amounts do not necessarily represent future cash requirements. Each customer is evaluated individually for creditworthiness under the same underwriting standards used for commitments to extend credit and on-balance sheet instruments. Company policies governing loan collateral apply to standby letters of credit at the time of credit extension. Loan-to-value ratios generally range from 50% for movable assets, such as inventory, to 100% for liquid assets, such as bank CD's. Fees for standby letters of credit typically range from 1% to 3% of the notional amount. Fees are collected upfront and are amortized over the life of the commitment. The fair values of Arrow's standby letters of credit at March 31, 2015, December 31, 2014 and March 31, 2014, in the table above, were the same as the carrying amounts. The fair value of standby letters of credit is based on the fees currently charged for similar agreements or the cost to terminate the arrangement with the counterparties.
	The fair value of commitments to extend credit is determined by estimating the fees to enter into similar agreements, taking into account the remaining terms and present creditworthiness of the counterparties, and for fixed rate loan commitments, the difference between the current and committed interest rates. Arrow provides several types of commercial lines of credit and standby letters of credit to its commercial customers. The pricing of these services is not isolated as Arrow considers the customer's complete deposit and borrowing relationship in pricing individual products and services. The commitments to extend credit also include commitments under home equity lines of credit, for which Arrow charges no fee. The carrying value and fair value of commitments to extend credit are not material and Arrow does not expect to incur any material loss as a result of these commitments.

Comprehensive_Income

Comprehensive Income	3 Months Ended
	Mar. 31, 2015
Comprehensive Income [Abstract]
Other Comprehensive Income, Noncontrolling Interest [Text Block]	COMPREHENSIVE INCOME (In Thousands)

	The following table presents the components of other comprehensive income for the three and three months ended March 31, 2015 and 2014 :


	Schedule of Comprehensive Income
		Three Months Ended March 31,
						Tax
		Before-Tax				(Expense)				Net-of-Tax
		Amount				Benefit				Amount
	2015
	Net Unrealized Securities Holding Gains Arising During the Period	$	1,225			$	(480	)		$	745

	Reclassification Adjustment for Securities Gains Included in Net Income	90				(35		)		55

	Amortization of Net Retirement Plan Actuarial Loss	192				(75		)		117

	Accretion of Net Retirement Plan Prior Service Credit	(13		)		6				(7		)

	Other Comprehensive Income	$	1,494			$	(584	)		$	910


	2014
	Net Unrealized Securities Holding Gains Arising During the Period	$	399			$	(158	)		$	241

	Reclassification Adjustment for Securities Gains Included in Net Income	—				—				—

	Amortization of Net Retirement Plan Actuarial Loss	116				(46		)		70

	Accretion of Net Retirement Plan Prior Service Credit	(22		)		9				(13		)

	Other Comprehensive Income	$	493			$	(195	)		$	298


	The following table presents the changes in accumulated other comprehensive income by component:



	Changes in Accumulated Other Comprehensive Income (Loss) by Component (1)

		Unrealized				Defined Benefit Plan Items
		Gains and
		Losses on								Net Prior
		Available-for-				Net Gain				Service
		Sale Securities				(Loss)				(Cost ) Credit				Total
	For the Year-To-Date periods ended:

	December 31, 2014	$	2,539			$	(9,255	)		$	(450	)		$	(7,166	)

	Other comprehensive income before reclassifications	745				—				—				745

	Amounts reclassified from accumulated other comprehensive income	55				117				(7		)		165

	Net current-period other comprehensive income	800				117				(7		)		910

	March 31, 2015	$	3,339			$	(9,138	)		$	(457	)		$	(6,256	)


	December 31, 2013	$	2,374			$	(6,697	)		$	(50	)		$	(4,373	)

	Other comprehensive income before reclassifications	241				—				—				241

	Amounts reclassified from accumulated other comprehensive income	—				70				(13		)		57

Net current-period other comprehensive income	241				70				(13		)		298

March 31, 2014	$	2,615			$	(6,627	)		$	(63	)		$	(4,075	)




(1) All amounts are net of tax. Amounts in parentheses indicate debits.
The following table presents the reclassifications out of accumulated other comprehensive income:



Reclassifications Out of Accumulated Other Comprehensive Income (1)

		Amounts Reclassified
Details about Accumulated Other		from Accumulated Other				Affected Line Item in the Statement
Comprehensive Income (Loss) Components		Comprehensive Income				Where Net Income Is Presented

For the Year-to-date periods ended:

March 31, 2015

Unrealized gains and losses on available-for-sale securities
		$	(90	)		Gain on Securities Transactions
		(90		)		Total before Tax
		35				Provision for Income Taxes

		$	(55	)		Net of Tax

Amortization of defined benefit pension items
Prior-service costs		$	13		(2)	Salaries and Employee Benefits

Actuarial gains/(losses)		(192		)	(2)	Salaries and Employee Benefits
		(179		)		Total before Tax
		69				Provision for Income Taxes

		$	(110	)		Net of Tax

Total reclassifications for the period		$	(165	)		Net of Tax


March 31, 2014

Unrealized gains and losses on available-for-sale securities
		$	—			Gain on Securities Transactions

		—				Total before Tax

		—				Provision for Income Taxes

		$	—			Net of Tax


Amortization of defined benefit pension items
Prior-service costs		22			(2)	Salaries and Employee Benefits

Actuarial gains/(losses)		$	(116	)	(2)	Salaries and Employee Benefits
		(94		)		Total before Tax
		37				Provision for Income Taxes

		$	(57	)		Net of Tax

Total reclassifications for the period		$	(57	)		Net of Tax


(1) Amounts in parentheses indicate debits to profit/loss.
(2) These accumulated other comprehensive income components are included in the computation of net periodic pension cost.

Stock_Based_Compensation_Plans

Stock Based Compensation Plans	3 Months Ended
Stock Based Compensation Plans	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	STOCK BASED COMPENSATION PLANS

	Under our 2013 Long-Term Incentive Plan, we granted options in the first quarter of 2015 to purchase shares of our common stock. The fair values of the options were estimated on the date of grant using the Black-Scholes option-pricing model. The fair value of our grants is expensed over the four year vesting period.
	The following table presents a roll-forward of our stock option plans and grants issued during 2015:
	.


	Schedule of Share-based Compensation Arrangements
		Stock Option Plans
	Roll-Forward of Shares Outstanding:
	Outstanding at January 1, 2015	401,442
	Outstanding at January 1, 2015	401,442
	Granted	54,500
	Granted	54,500
	Exercised	(3,027		)
	Forfeited	—
	Forfeited	—
	Outstanding at March 31, 2015	452,915
	Outstanding at March 31, 2015	452,915
	Exercisable at Period-End	319,815
	Exercisable at Period-End	319,815
	Vested and Expected to Vest	133,100
	Vested and Expected to Vest	133,100

	Roll-Forward of Shares Outstanding - Weighted Average Exercise Price:
	Outstanding at January 1, 2015	$	22.66
	Outstanding at January 1, 2015	$	22.66
	Granted	25.86
	Granted	25.86
	Exercised	22.78
	Exercised	22.78
	Forfeited	—
	Forfeited	—
	Outstanding at March 31, 2015	23.04
	Outstanding at March 31, 2015	23.04
	Exercisable at Period-End	22.11
	Exercisable at Period-End	22.11
	Vested and Expected to Vest	25.28
	Vested and Expected to Vest	25.28

	Grants Issued During 2015 - Weighted Average Information:
	Fair Value	5.78
	Fair Value	5.78
	Fair Value Assumptions:
	Dividend Yield	3.9		%
	Expected Volatility	33.55		%
	Risk Free Interest Rate	1.57		%
	Expected Lives (in years)	7.66
	Expected Lives (in years)	7.66


	The following table presents information on the amounts expensed for the periods ended March 31, 2015 and 2014:


	Share-Based Compensation Expense
			For the Three Months Ended March 31,
			2015		2014
	Share-Based Compensation Expense		$	82	$	90
	Share-Based Compensation Expense		$	82	$	90

	Arrow also sponsors an Employee Stock Purchase Plan under which employees purchase Arrow's common stock at a 5% discount below market price. Under current accounting guidance, a stock purchase plan with a discount of 5% or less is not considered a compensatory plan.

Retirement_Plans

Retirement Plans	3 Months Ended
	Mar. 31, 2015
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Pension and Other Postretirement Benefits Disclosure [Text Block]	RETIREMENT PLANS (Dollars in Thousands)

	The following tables provide the components of net periodic benefit costs for the three-month period ended March 31:


					Select
		Employees'			Executive		Postretirement
		Pension			Retirement		Benefit
		Plan			Plan		Plans
	Net Periodic Benefit Cost
	For the Three Months Ended March 31, 2015:
	Service Cost	$	353		$	3	$	43

	Interest Cost	394			48		58

	Expected Return on Plan Assets	(808		)	—		—

	Amortization of Prior Service Cost (Credit)	(20		)	15		(8		)

	Amortization of Net Loss	138			30		24

	Net Periodic Benefit Cost	$	57		$	96	$	117


	Plan Contributions During the Period	$	—		$	115	$	47


	Estimated Future Contributions in the Current Fiscal Year	$	—		$	345	$	141


	For the Three Months Ended March 31, 2014:
	Service Cost	$	377		$	—	$	53

	Interest Cost	330			61		110

	Expected Return on Plan Assets	(722		)	—		—

	Amortization of Prior Service (Credit) Cost	(11		)	18		(29		)

	Amortization of Net Loss	86			23		7

	Net Periodic Benefit Cost	$	60		$	102	$	141


	Plan Contributions During the Period	$	—		$	119	$	142


	We are not required to make a contribution to our qualified pension plan in 2015, and currently, we do not expect to make a contribution in 2015. Arrow makes contributions to its other post-retirement benefit plans in an amount equal to benefit payments for the year.

Earnings_Per_Common_Share

Earnings Per Common Share	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Earnings Per Share [Text Block]	EARNINGS PER COMMON SHARE (In Thousands, Except Per Share Amounts)

	The following table presents a reconciliation of the numerator and denominator used in the calculation of basic and diluted earnings per common share (“EPS”) for periods ended March 31, 2015 and 2014. All share and per share amounts have been adjusted for the September 2014 2% stock dividend.


	Earnings Per Share
		Year-to-Date Period Ended:
		March 31, 2015		March 31, 2014
	Earnings Per Share - Basic:
	Net Income	$	5,855	$	5,320

	Weighted Average Shares - Basic	12,633		12,601

	Earnings Per Share - Basic	$	0.46	$	0.42


	Earnings Per Share - Diluted:
	Net Income	$	5,855	$	5,320

	Weighted Average Shares - Basic	12,633		12,601

	Dilutive Average Shares Attributable to Stock Options	38		24

	Weighted Average Shares - Diluted	12,671		12,625

	Earnings Per Share - Diluted	$	0.46	$	0.42

	Antidilutive Shares Excluded from the Calculation	—		—
	of Earnings Per Share

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Text Block]	FAIR VALUE OF FINANCIAL INSTRUMENTS (In Thousands)

	FASB ASC Subtopic 820-10 defines fair value, establishes a framework for measuring fair value in generally accepted accounting principles (GAAP) and requires certain disclosures about fair value measurements. We do not have any nonfinancial assets or liabilities measured at fair value on a recurring basis. The only assets or liabilities that Arrow measured at fair value on a recurring basis at March 31, 2015, December 31, 2014 and March 31, 2014 were securities available-for-sale. Arrow held no securities or liabilities for trading on such dates.
	The table below presents the financial instrument's fair value and the amounts within the fair value hierarchy based on the lowest level of input that is significant to the fair value measurement:


	Fair Value of Assets and Liabilities Measured on a Recurring and Nonrecurring Basis
					Fair Value Measurements at Reporting Date Using:
		Fair Value			Quoted Prices			Significant Other			Significant Unobservable Inputs			Total Gains (Losses)
					In Active Markets for Identical Assets			Observable Inputs			(Level 3)
					(Level 1)			(Level 2)
	Fair Value of Assets and Liabilities Measured on a Recurring Basis:
	March 31, 2015
	Securities Available-for Sale:
	U.S. Agency Obligations	$	151,527		$	—		$	151,527		$	—

	State and Municipal Obligations	74,095			—			74,095			—

	Mortgage-Backed Securities - Residential	149,510			—			149,510			—

	Corporate and Other Debt Securities	16,756			—			16,756			—

	Mutual Funds and Equity Securities	1,245			—			1,245			—

	Total Securities Available-for-Sale	$	393,133		$	—		$	393,133		$	—

	December 31, 2014
	Securities Available-for Sale:
	U.S. Agency Obligations	$	137,603		$	—		$	137,603		$	—

	State and Municipal Obligations	81,730			—			81,730			—

	Mortgage-Backed Securities - Residential	128,827			—			128,827			—

	Corporate and Other Debt Securities	16,725			—			16,725			—

	Mutual Funds and Equity Securities	1,254			—			1,254			—

	Total Securities Available-for Sale	$	366,139		$	—		$	366,139		$	—

	March 31, 2014
	Securities Available-for Sale:
	U.S. Agency Obligations	$	121,220		$	—		$	121,220		$	—

	State and Municipal Obligations	125,410			—			125,410			—

	Mortgage-Backed Securities - Residential	164,541			—			164,541			—

	Corporate and Other Debt Securities	16,839			—			16,839			—

	Mutual Funds and Equity Securities	1,220			—			1,220			—

	Total Securities Available-for Sale	$	429,230		$	—		$	429,230		$	—


	Fair Value of Assets and Liabilities Measured on a Nonrecurring Basis:
	March 31, 2015
	Other Real Estate Owned and Repossessed Assets, Net	$	529		$	—		$	—		$	529		$	(15	)

	Collateral Dependent Impaired Loans	600			—			—			$	600		(149		)

	December 31, 2014

	Other Real Estate Owned and Repossessed Assets, Net	$	393		$	—		$	—		$	393		$	(15	)

Collateral Dependent Impaired Loans	574			—			—			$	574		(109		)

March 31, 2014

Other Real Estate Owned and Repossessed Assets, Net	$	198		$	—		$	—		$	198		$	(52	)

We determine the fair value of financial instruments under the following hierarchy:

•	Level 1 - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities;

•	Level 2 - Quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, or inputs that are observable, either directly or indirectly, for substantially the full term of the asset or liability; and

•	Level 3 - Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported by little or no market activity).

Fair Value Methodology for Assets and Liabilities Measured on a Recurring Basis

The fair value of Level 1 securities available-for-sale are based on unadjusted, quoted market prices from exchanges in active markets. The fair value of Level 2 securities available-for-sale are based on an independent bond and equity pricing service for identical assets or significantly similar securities and an independent equity pricing service for equity securities not actively traded. The pricing service uses a variety of techniques to arrive at fair value including market maker bids, quotes and pricing models. Inputs to the pricing models include recent trades, benchmark interest rates, spreads and actual and projected cash flows.

Fair Value Methodology for Assets and Liabilities Measured on a Nonrecurring Basis

The fair value of collateral dependent impaired loans was based on third-party appraisals of the collateral. The fair value of other real estate owned was based on third-party appraisals. Other assets which might have been included in this table include mortgage servicing rights, goodwill and other intangible assets. Arrow evaluates each of these assets for impairment on a quarterly basis, with no impairment recognized for these assets at March 31, 2015, December 31, 2014 and March 31, 2014.



Fair Value by Balance Sheet Grouping

The following table presents a summary of the carrying amount, the fair value or an amount approximating fair value and the fair value hierarchy of Arrow’s financial instruments:


Schedule of Fair Values by Balance Sheet Grouping
							Fair Value Hierarchy
	Carrying			Fair			Level 1			Level 2			Level 3
	Amount			Value
March 31, 2015
Cash and Cash Equivalents	$	111,595		$	111,595		$	111,595		$	—		$	—

Securities Available-for-Sale	393,133			393,133			—			393,133			—

Securities Held-to-Maturity	305,175			312,500			—			312,500			—

Federal Home Loan Bank and Federal	4,806			4,806			4,806			—			—
Reserve Bank Stock
Net Loans	1,419,169			1,429,553			—			—			1,429,553

Accrued Interest Receivable	6,698			6,698			6,698			—			—

Deposits	2,018,704			2,016,098			1,820,165			195,933			—

Federal Funds Purchased and Securities	15,895			15,895			15,895			—			—
Sold Under Agreements to Repurchase
Federal Home Loan Bank Term Advances	50,000			50,851			—			50,851			—

Junior Subordinated Obligations Issued	20,000			20,000			—			20,000			—
to Unconsolidated Subsidiary Trusts
Accrued Interest Payable	289			289			289			—			—


December 31, 2014
Cash and Cash Equivalents	$	46,295		$	46,295		$	46,295		$	—		$	—

Securities Available-for-Sale	366,139			366,139			—			366,139			—

Securities Held-to-Maturity	302,024			308,566			—			308,566			—

Federal Home Loan Bank and Federal	4,851			4,851			4,851			—			—
Reserve Bank Stock
Net Loans	1,397,698			1,405,454			—			—			1,405,454

Accrued Interest Receivable	5,834			5,834			5,834			—			—

Deposits	1,902,948			1,899,682			1,697,105			202,577			—

Federal Funds Purchased and Securities	19,421			19,421			19,421			—			—
Sold Under Agreements to Repurchase
Federal Home Loan Bank Term Advances	51,000			51,258			41,000			10,258			—

Junior Subordinated Obligations Issued	20,000			20,000			—			20,000			—
to Unconsolidated Subsidiary Trusts
Accrued Interest Payable	274			274			274			—			—


March 31, 2014
Cash and Cash Equivalents	$	76,050		$	76,050		$	76,050		$	—		$	—

Securities Available-for-Sale	429,230			429,230			—			429,230			—

Securities Held-to-Maturity	317,632			322,335			—			322,335			—

Federal Home Loan Bank and Federal	3,896			3,896			3,896			—			—
Reserve Bank Stock
Net Loans	1,295,787			1,306,043			—			—			1,306,043

Accrued Interest Receivable	6,808			6,808			6,808			—			—

Deposits	1,948,019			1,944,116			1,709,784			234,332			—

Federal Funds Purchased and Securities	13,787			13,787			13,787			—			—
Sold Under Agreements to Repurchase
Federal Home Loan Bank Term Advances	20,000			20,519			—			20,519			—

Junior Subordinated Obligations Issued	20,000			20,000			—			20,000			—
to Unconsolidated Subsidiary Trusts
Accrued Interest Payable	405			405			405			—			—


Fair Value Methodology for Financial Instruments Not Measured on a Recurring or Nonrecurring Basis

Securities held-to-maturity are fair valued utilizing an independent bond pricing service for identical assets or significantly similar securities. The pricing service uses a variety of techniques to arrive at fair value including market maker bids, quotes and pricing models. Inputs to the pricing models include recent trades, benchmark interest rates, spreads and actual and projected cash flows.
Fair values for loans are estimated for portfolios of loans with similar financial characteristics. Loans are segregated by type such as commercial, commercial real estate, residential mortgage, indirect and other consumer loans. Each loan category is further segmented into fixed and adjustable interest rate terms and by performing and nonperforming categories. The fair value of performing loans is calculated by discounting scheduled cash flows through the estimated maturity using estimated market discount rates that reflect the credit and interest rate risk inherent in the loan. The estimate of maturity is based on historical experience with repayments for each loan classification, modified, as required, by an estimate of the effect of current economic and lending conditions. Fair value for nonperforming loans is generally based on recent external appraisals. If appraisals are not available, estimated cash flows are discounted using a rate commensurate with the risk associated with the estimated cash flows. Assumptions regarding credit risk, cash flows and discount rates are judgmentally determined using available market information and specific borrower information.
The fair value of time deposits is based on the discounted value of contractual cash flows, except that the fair value is limited to the extent that the customer could redeem the certificate after imposition of a premature withdrawal penalty. The discount rates are estimated using the FHLBNY yield curve, which is considered representative of Arrow’s time deposit rates. The fair value of all other deposits is equal to the carrying value.
The fair value of FHLBNY advances is estimated based on the discounted value of contractual cash flows. The discount rate is estimated using current rates on FHLBNY advances with similar maturities and call features.
Based on Arrow’s capital adequacy, the book value of the outstanding trust preferred securities (Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts) are considered to approximate fair value since the interest rates are variable (indexed to LIBOR) and Arrow is well-capitalized.

Accounting_Policies_Significan

Accounting Policies Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
New Accounting Standards Updates [Policy Text Block]	New Accounting Standards Updates (ASU): During 2015, through the date of this report, the FASB issued five accounting standards updates, none of which had an immediate impact on Arrow, but could in the future.
	ASU 2015-01 "Income Statement - Extraordinary and Unusual Items" eliminated the concept of extraordinary items. For Arrow, the standard is effective for the first quarter of 2016.
	ASU 2015-02 "Consolidation" changed the analysis that a reporting entity must perform to determine whether it should consolidate certain types of legal entities. For Arrow, the standard is effective for the first quarter of 2016.
	ASU 2015-03 "Interest - Imputation of Interest" required debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability. There were no changes to the recognition and measurement of debt issuance costs. For Arrow, the standard is effective for the first quarter of 2016.
	ASU 2015-04 "Compensation-Retirement Benefits" provides several practical expedients for the measurement or, in certain circumstances, the remeasurement of defined benefit plan assets and obligations. Most of the practical expedients will not apply to Arrow, however, if used, an entity must disclose the accounting policy election and the date used to measure defined benefit plan assets and obligations. For Arrow, the standard is effective for the first quarter of 2016.
	ASU 2015-05 "Intangibles - Goodwill and Other - Internal use Software" provides guidance to customers about whether a cloud computing arrangement includes a software license. If a cloud computing arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. For Arrow, the standard is effective for the first quarter of 2016.

Investment_Securities_Tables

Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Available-For-Sale Securities [Table Text Block]	The following table is the schedule of Available-For-Sale Securities at March 31, 2015, December 31, 2014 and March 31, 2014:


	Available-For-Sale Securities
			U.S. Agency			State and			Mortgage-			Corporate			Mutual Funds			Total
			Obligations			Municipal			Backed			and Other			and Equity			Available-
						Obligations			Securities -			Debt			Securities			For-Sale
									Residential			Securities						Securities
	March 31, 2015
	Available-For-Sale Securities,		$	150,500		$	73,886		$	145,185		$	16,949		$	1,120		$	387,640
	at Amortized Cost
	Available-For-Sale Securities,		151,527			74,095			149,510			16,756			1,245			393,133
	at Fair Value
	Gross Unrealized Gains		1,049			217			4,325			19			125			5,735

	Gross Unrealized Losses		22			9			—			212			—			243

	Available-For-Sale Securities,																	284,708
	Pledged as Collateral

	Maturities of Debt Securities,
	at Amortized Cost:
	Within One Year		5,000			23,532			1,515			4,938						34,985

	From 1 - 5 Years		145,500			48,471			122,340			11,010						327,321

	From 5 - 10 Years		—			1,243			21,330			—						22,573

	Over 10 Years		—			640			—			1,000						1,640


	Maturities of Debt Securities,
	at Fair Value:
	Within One Year		5,005			23,573			1,532			4,947						35,057

	From 1 - 5 Years		146,522			48,638			125,850			11,009						332,019

	From 5 - 10 Years		—			1,244			22,128			—						23,372

	Over 10 Years		—			640			—			800						1,440



	Available-For-Sale Securities
			U.S. Agency			State and			Mortgage-			Corporate			Mutual Funds			Total
			Obligations			Municipal			Backed			and Other			and Equity			Available-
						Obligations			Securities -			Debt			Securities			For-Sale
									Residential			Securities						Securities

	Securities in a Continuous
	Loss Position, at Fair Value:
	Less than 12 Months		$	—		$	—		$	—		$	—		$	—		$	—

	12 Months or Longer		13,937			6,581			22			5,702			—			26,242

	Total		$	13,937		$	6,581		$	22		$	5,702		$	—		$	26,242

	Number of Securities in a		46			7			31			22			—			106
	Continuous Loss Position

	Unrealized Losses on
	Securities in a Continuous
	Loss Position:
	Less than 12 Months		$	—		$	—		$	—		$	—		$	—		$	—

12 Months or Longer		22			9			—			212			—			243

Total		$	22		$	9		$	—		$	212		$	—		$	243


December 31, 2014
Available-For-Sale Securities,		$	137,540		$	81,582		$	124,732		$	16,988		$	1,120		$	361,962
at Amortized Cost
Available-For-Sale Securities,		137,603			81,730			128,827			16,725			1,254			366,139
at Fair Value
Gross Unrealized Gains		208			187			4,100			7			134			4,636

Gross Unrealized Losses		145			39			5			270			—			459

Available-For-Sale Securities,																	267,384
Pledged as Collateral

Securities in a Continuous
Loss Position, at Fair Value:
Less than 12 Months		$	39,631		$	3,309		$	82		$	—		$	—		$	43,022

12 Months or Longer		28,020			14,035			1,546			10,738			—			54,339

Total		$	67,651		$	17,344		$	1,628		$	10,738		$	—		$	97,361

Number of Securities in a		22			65			3			15			—			105
Continuous Loss Position

Unrealized Losses on
Securities in a Continuous
Loss Position:
Less than 12 Months		$	48		$	—		$	—		$	—		$	—		$	48

12 Months or Longer		97			39			5			270			—			411

Total		$	145		$	39		$	5		$	270		$	—		$	459


March 31, 2014
Available-For-Sale Securities,		$	121,477		$	125,165		$	160,023		$	17,115		$	1,120		$	424,900
at Amortized Cost
Available-For-Sale Securities,		121,220			125,410			164,541			16,839			1,220			429,230
at Fair Value
Gross Unrealized Gains		3			333			4,616			14			100			5,066

Gross Unrealized Losses		260			88			98			290			—			736

Available-For-Sale Securities,																	329,039
Pledged as Collateral

Securities in a Continuous
Loss Position, at Fair Value:
Less than 12 Months		$	50,778		$	17,937		$	10,613		$	5,868		$	—		$	85,196

12 Months or Longer		6,124			3,653			4,063			3,392			—			17,232

Total		$	56,902		$	21,590		$	14,676		$	9,260		$	—		$	102,428



Available-For-Sale Securities
		U.S. Agency			State and			Mortgage-			Corporate			Mutual Funds			Total
		Obligations			Municipal			Backed			and Other			and Equity			Available-
					Obligations			Securities -			Debt			Securities			For-Sale
								Residential			Securities						Securities
Number of Securities in a		16			87			9			13			—			125
Continuous Loss Position

Unrealized Losses on
Securities in a Continuous
Loss Position:
Less than 12 Months		$	222		$	72		$	81		$	50		$	—		$	425

12 Months or Longer		38			16			17			240			—			311

Total		$	260		$	88		$	98		$	290		$	—		$	736

Held-To-Maturity Securities [Table Text Block]	The following table is the schedule of Held-To-Maturity Securities at March 31, 2015, December 31, 2014 and March 31, 2014:


	Held-To-Maturity Securities
			State and			Mortgage-			Corporate			Total
			Municipal			Backed			and Other			Held-To
			Obligations			Securities -			Debt			Maturity
						Residential			Securities			Securities
	March 31, 2015
	Held-To-Maturity Securities,		$	195,951		$	108,224		$	1,000		$	305,175
	at Amortized Cost
	Held-To-Maturity Securities,		200,578			110,922			1,000			312,500
	at Fair Value
	Gross Unrealized Gains		4,753			2,698			—			7,451

	Gross Unrealized Losses		126			—			—			126

	Held-To-Maturity Securities,											285,132
	Pledged as Collateral

	Maturities of Debt Securities,
	at Amortized Cost:
	Within One Year		35,926			—			—			35,926

	From 1 - 5 Years		89,022			43,820			—			132,842

	From 5 - 10 Years		67,708			64,404			—			132,112

	Over 10 Years		3,295			—			1,000			4,295


	Maturities of Debt Securities,
	at Fair Value:
	Within One Year		35,968			—			—			35,968

	From 1 - 5 Years		91,192			44,816			—			136,008

	From 5 - 10 Years		70,047			66,106			—			136,153

	Over 10 Years		3,371			—			1,000			4,371


	Securities in a Continuous
	Loss Position, at Fair Value:
	Less than 12 Months		$	—		$	—		$	—		$	—

	12 Months or Longer		16,010			—			—			16,010

	Total		$	16,010		$	—		$	—		$	16,010

	Number of Securities in a		585			7			—			592
	Continuous Loss Position

	Unrealized Losses on
	Securities in a Continuous
	Loss Position:
	Less than 12 Months		$	—		$	—		$	—		$	—

	12 Months or Longer		126			—			—			126

	Total		$	126		$	—		$	—		$	126




Held-To-Maturity Securities
		State and			Mortgage-			Corporate			Total
		Municipal			Backed			and Other			Held-To
		Obligations			Securities -			Debt			Maturity
					Residential			Securities			Securities
December 31, 2014
Held-To-Maturity Securities,		$	188,472		$	112,552		$	1,000		$	302,024
at Amortized Cost
Held-To-Maturity Securities,		193,252			114,314			1,000			308,566
at Fair Value
Gross Unrealized Gains		4,935			1,770			—			6,705

Gross Unrealized Losses		155			8			—			163

Held-To-Maturity Securities,											282,640
Pledged as Collateral

Securities in a Continuous
Loss Position, at Fair Value:
Less than 12 Months		$	2,143		$	4,581		$	—		$	6,724

12 Months or Longer		16,033			—			—			16,033

Total		$	18,176		$	4,581		$	—		$	22,757

Number of Securities in a		74			1			—			75
Continuous Loss Position

Unrealized Losses on
Securities in a Continuous
Loss Position:
Less than 12 Months		$	17		$	8		$	—		$	25

12 Months or Longer		138			—			—			138

Total		$	155		$	8		$	—		$	163



March 31, 2014
Held-To-Maturity Securities,		$	190,847		$	125,785		$	1,000		$	317,632
at Amortized Cost
Held-To-Maturity Securities,		195,524			125,811			1,000			322,335
at Fair Value
Gross Unrealized Gains		5,042			274			—			5,316

Gross Unrealized Losses		365			248			—			613

Held-To-Maturity Securities,											316,632
Pledged as Collateral

Securities in a Continuous
Loss Position, at Fair Value:
Less than 12 Months		$	19,696		$	43,049		$	—		$	62,745

12 Months or Longer		5,112			—			—			5,112

Total		$	24,808		$	43,049		$	—		$	67,857

Number of Securities in a		86			17			—			103
Continuous Loss Position

Unrealized Losses on
Securities in a Continuous
Loss Position:
Less than 12 Months		$	324		$	248		$	—		$	572

12 Months or Longer		41			—			—			41

Total		$	365		$	248		$	—		$	613

Loans_Tables

Loans (Tables)	3 Months Ended
	Mar. 31, 2015
Loans and Leases Receivable Disclosure [Abstract]
Past Due Financing Receivables [Table Text Block]	The following table presents loan balances outstanding as of March 31, 2015, December 31, 2014 and March 31, 2014 and an analysis of the recorded investment in loans that are past due at these dates. Generally, Arrow considers a loan past due 30 or more days if the borrower is two or more payments past due. Loans held-for-sale of $828, $398 and $502 as of March 31, 2015, December 31, 2014 and March 31, 2014, respectively, are included in the residential real estate balances for current loans.




						Commercial
		Commercial				Real Estate				Consumer				Residential				Total
	March 31, 2015
	Loans Past Due 30-59 Days	$	370			$	255			$	3,357			$	2,205			$	6,187

	Loans Past Due 60-89 Days	48				—				428				519				995

	Loans Past Due 90 or more Days	284				1,838				147				2,707				4,976

	Total Loans Past Due	702				2,093				3,932				5,431				12,158

	Current Loans	99,208				337,194				436,970				549,264				1,422,636

	Total Loans	$	99,910			$	339,287			$	440,902			$	554,695			$	1,434,794


	Loans 90 or More Days Past Due	$	—			$	—			$	—			$	580			$	580
	and Still Accruing Interest
	Nonaccrual Loans	$	409			$	2,070			$	337			$	4,182			$	6,998


	December 31, 2014
	Loans Past Due 30-59 Days	$	124			$	432			$	4,167			$	482			$	5,205

	Loans Past Due 60-89 Days	154				7				1,225				1,495				2,881

	Loans Past Due 90 or more Days	345				1,832				206				2,999				5,382

	Total Loans Past Due	623				2,271				5,598				4,976				13,468

	Current Loans	98,888				337,841				431,443				531,628				1,399,800

	Total Loans	$	99,511			$	340,112			$	437,041			$	536,604			$	1,413,268


	Loans 90 or More Days Past Due	$	—			$	—			$	—			$	537			$	537
	and Still Accruing Interest
	Nonaccrual Loans	$	473			$	2,071			$	415			$	3,940			$	6,899


	March 31, 2014
	Loans Past Due 30-59 Days	$	597			$	1,381			$	2,714			$	2,026			$	6,718

	Loans Past Due 60-89 Days	579				237				528				438				1,782

	Loans Past Due 90 or more Days	29				1,785				150				2,244				4,208

	Total Loans Past Due	1,205				3,403				3,392				4,708				12,708

	Current Loans	88,671				333,464				405,012				470,568				1,297,715

	Total Loans	$	89,876			$	336,867			$	408,404			$	475,276			$	1,310,423


	Loans 90 or More Days Past Due	$	—			$	—			$	—			$	347			$	347
	and Still Accruing Interest
	Nonaccrual Loans	$	182			$	2,042			$	372			$	3,687			$	6,283

Allowance for Credit Losses on Financing Receivables [Table Text Block]	The following table presents a roll-forward of the allowance for loan losses and other information pertaining to the allowance for loan losses:


	Allowance for Loan Losses
						Commercial
		Commercial				Real Estate				Consumer				Residential				Unallocated			Total
	Roll-forward of the Allowance for Loan Losses for the Year-to-Date Periods:
	December 31, 2014	$	2,100			$	4,128			$	5,210			$	3,369			$	763		$	15,570

	Charge-offs	(16		)		—				(185		)		(89		)		—			(290		)

	Recoveries	7				—				63				—				—			70

	Provision	72				(295		)		179				349				(30		)	275

	March 31, 2015	$	2,163			$	3,833			$	5,267			$	3,629			$	733		$	15,625


	31-Dec-13	$	1,886			$	3,962			$	4,478			$	3,026			$	1,082		$	14,434

	Charge-offs	(123		)		—				(197		)		(16		)		—			(336		)

	Recoveries	19				—				61				—				—			80

	Provision	15				236				244				67				(104		)	458

	March 31, 2014	$	1,797			$	4,198			$	4,586			$	3,077			$	978		$	14,636




	Allowance for Loan Losses
						Commercial
		Commercial				Real Estate				Consumer				Residential				Unallocated			Total
	March 31, 2015
	Allowance for loan losses - Loans Individually Evaluated for Impairment	$	—			$	—			$	—			$	149			$	—		$	149

	Allowance for loan losses - Loans Collectively Evaluated for Impairment	$	2,163			$	3,833			$	5,267			$	3,480			$	733		$	15,476

	Ending Loan Balance - Individually Evaluated for Impairment	$	459			$	1,492			$	107			$	2,296			$	—		$	4,354

	Ending Loan Balance - Collectively Evaluated for Impairment	$	99,451			$	337,795			$	440,795			$	552,399			$	—		$	1,430,440


	December 31, 2014
	Allowance for loan losses - Loans Individually Evaluated for Impairment	$	—			$	—			$	—			$	109			$	—		$	109

	Allowance for loan losses - Loans Collectively Evaluated for Impairment	$	2,100			$	4,128			$	5,210			$	3,260			$	763		$	15,461

	Ending Loan Balance - Individually Evaluated for Impairment	$	494			$	1,492			$	118			$	2,237			$	—		$	4,341

	Ending Loan Balance - Collectively Evaluated for Impairment	$	99,017			$	338,620			$	436,923			$	534,367			$	—		$	1,408,927


	March 31, 2014
	Allowance for loan losses - Loans Individually Evaluated for Impairment	$	—			$	—			$	—			$	—			$	—		$	—

	Allowance for loan losses - Loans Collectively Evaluated for Impairment	$	1,797			$	4,198			$	4,586			$	3,077			$	978		$	14,636

	Ending Loan Balance - Individually Evaluated for Impairment	$	214			$	1,810			$	144			$	1,913			$	—		$	4,081

	Ending Loan Balance - Collectively Evaluated for Impairment	$	89,662			$	335,057			$	408,260			$	473,363			$	—		$	1,306,342


Financing Receivable Credit Quality Indicators [Table Text Block]	The following table presents the credit quality indicators by loan category at March 31, 2015, December 31, 2014 and March 31, 2014:


	Loan Credit Quality Indicators
						Commercial
		Commercial				Real Estate				Consumer				Residential				Total
	March 31, 2015
	Credit Risk Profile by Creditworthiness Category:
	Satisfactory	$	85,597			$	317,590											$	403,187

	Special Mention	2,575				2,849												5,424

	Substandard	11,738				18,848												30,586

	Doubtful	—				—												—

	Credit Risk Profile Based on Payment Activity:
	Performing									$	440,565			$	549,932			990,497

	Nonperforming									337				4,763				5,100


	December 31, 2014
	Credit Risk Profile by Creditworthiness Category:
	Satisfactory	85,949				317,747												403,696

	Special Mention	2,442				3,718												6,160

	Substandard	11,120				18,647												29,767

	Doubtful	—				—												—

	Credit Risk Profile Based on Payment Activity:
	Performing									436,626				532,127				968,753

	Nonperforming									415				4,477				4,892


	March 31, 2014
	Credit Risk Profile by Creditworthiness Category:
	Satisfactory	82,263				315,558												397,821

	Special Mention	960				614												1,574

	Substandard	6,653				20,695												27,348

	Doubtful	—				—												—

	Credit Risk Profile Based on Payment Activity:
	Performing									408,031				471,242				879,273

	Nonperforming									373				4,034				4,407

Impaired Financing Receivables [Table Text Block]	The following table presents information on impaired loans based on whether the impaired loan has a recorded related allowance or has no recorded related allowance:


	Impaired Loans
						Commercial
		Commercial				Real Estate				Consumer				Residential				Total
	March 31, 2015

	Recorded Investment:
	With No Related Allowance	$	459			$	1,492			$	107			$	1,697			$	3,755

	With a Related Allowance	—				—				—				599				599

	Unpaid Principal Balance:
	With No Related Allowance	459				1,492				107				1,697				3,755

	With a Related Allowance	—				—				—				599				599


	December 31, 2014

	Recorded Investment:
	With No Related Allowance	$	494			$	1,492			$	118			$	1,678			$	3,782

	With a Related Allowance	—				—				—				559				559

	Unpaid Principal Balance:
	With No Related Allowance	494				1,492				118				1,678				3,782

	With a Related Allowance	—				—				—				559				559


	March 31, 2014
	Recorded Investment:
	With No Related Allowance	$	214			$	1,810			$	144			$	1,913			$	4,081

	With a Related Allowance	—				—				—				—				—

	Unpaid Principal Balance:
	With No Related Allowance	214				1,810				144				1,913				$	4,081

	With a Related Allowance	—				—				—				—				—


	For the Year-To-Date Period Ended:
	March 31, 2015
	Average Recorded Balance:

	With No Related Allowance	$	477			$	1,492			$	113			$	1,688			$	3,770

	With a Related Allowance	—				—				—				579				579

	Interest Income Recognized:
	With No Related Allowance	2				—				1				1				4

	With a Related Allowance	—				—				—				—				—

	Cash Basis Income:
	With No Related Allowance	—				—				—				—				—

	With a Related Allowance	—				—				—				—				—


	March 31, 2014
Average Recorded Balance:
With No Related Allowance	$	218			$	1,798			$	159			$	2,111			$	4,286

With a Related Allowance	—				—				—				—				—

Interest Income Recognized:
With No Related Allowance	3				10				2				1				16

With a Related Allowance	—				—				—				—				—

Cash Basis Income:
With No Related Allowance	—				—				—				—				—

With a Related Allowance	—				—				—				—				—

Troubled Debt Restructurings on Financing Receivables [Table Text Block]	The following table presents information on loans modified in trouble debt restructurings during the periods indicated. All loans were modified under Arrow's own programs. The principal modification, for all the modifications in the table below, involved payment deferrals.


	Loans Modified in Trouble Debt Restructurings During the Period
						Commercial
		Commercial				Real Estate				Consumer				Residential				Total
	For the Year-To-Date Period Ended:
	March 31, 2015
	Number of Loans	—				—				1				—				1

	Pre-Modification Outstanding Recorded Investment	$	—			$	—			$	2			$	—			$	2

	Post-Modification Outstanding Recorded Investment	$	—			$	—			$	2			$	—			$	2


	March 31, 2014
	Number of Loans	—				—				1				—				1

	Pre-Modification Outstanding Recorded Investment	$	—			$	—			$	2			$	—			$	2

	Post-Modification Outstanding Recorded Investment	$	—			$	—			$	2			$	—			$	2

Guarantees_Tables

Guarantees (Tables)	3 Months Ended
	Mar. 31, 2015
Guarantees [Abstract]
Schedule of Guarantor Obligations [Table Text Block]	The following table presents the balance for standby letters of credit for the periods ended March 31, 2015, December 31, 2014 and March 31, 2014:


	Loan Commitments and Letters of Credit
		March 31, 2015		December 31, 2014		March 31, 2014
	Notional Amount:
	Commitments to Extend Credit	$	259,634	$	249,803	$	235,549

	Standby Letters of Credit	3,193		3,317		3,333

	Fair Value:
	Commitments to Extend Credit	$	—	$	—	$	—

	Standby Letters of Credit	37		39		56

Comprehensive_Income_Tables

Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2015
Comprehensive Income [Abstract]
Schedule of Comprehensive Income (Loss) [Table Text Block]	The following table presents the components of other comprehensive income for the three and three months ended March 31, 2015 and 2014 :


	Schedule of Comprehensive Income
		Three Months Ended March 31,
						Tax
		Before-Tax				(Expense)			Net-of-Tax
		Amount				Benefit			Amount
	2015
	Net Unrealized Securities Holding Gains Arising During the Period	$	1,225			$	(480	)	$	745

	Reclassification Adjustment for Securities Gains Included in Net Income	90				(35		)	55

	Amortization of Net Retirement Plan Actuarial Loss	192				(75		)	117

	Accretion of Net Retirement Plan Prior Service Credit	(13		)		6			(7		)

	Other Comprehensive Income	$	1,494			$	(584	)	$	910


	2014
	Net Unrealized Securities Holding Gains Arising During the Period	$	399			$	(158	)	$	241

	Reclassification Adjustment for Securities Gains Included in Net Income	—				—			—

	Amortization of Net Retirement Plan Actuarial Loss	116				(46		)	70

	Accretion of Net Retirement Plan Prior Service Credit	(22		)		9			(13		)

	Other Comprehensive Income	$	493			$	(195	)	$	298

Changes in Accumulated Other Comprehensive Income By Component [Table Text Block]	The following table presents the changes in accumulated other comprehensive income by component:



	Changes in Accumulated Other Comprehensive Income (Loss) by Component (1)

		Unrealized				Defined Benefit Plan Items
		Gains and
		Losses on							Net Prior
		Available-for-				Net Gain			Service
		Sale Securities				(Loss)			(Cost ) Credit			Total
	For the Year-To-Date periods ended:

	December 31, 2014	$	2,539			$	(9,255	)	$	(450	)	$	(7,166	)

	Other comprehensive income before reclassifications	745				—			—			745

	Amounts reclassified from accumulated other comprehensive income	55				117			(7		)	165

	Net current-period other comprehensive income	800				117			(7		)	910

	March 31, 2015	$	3,339			$	(9,138	)	$	(457	)	$	(6,256	)


	December 31, 2013	$	2,374			$	(6,697	)	$	(50	)	$	(4,373	)

	Other comprehensive income before reclassifications	241				—			—			241

	Amounts reclassified from accumulated other comprehensive income	—				70			(13		)	57

	Net current-period other comprehensive income	241				70			(13		)	298

	March 31, 2014	$	2,615			$	(6,627	)	$	(63	)	$	(4,075	)




	(1) All amounts are net of tax. Amounts in parentheses indicate debits.
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]	The following table presents the reclassifications out of accumulated other comprehensive income:



	Reclassifications Out of Accumulated Other Comprehensive Income (1)

			Amounts Reclassified
	Details about Accumulated Other		from Accumulated Other				Affected Line Item in the Statement
	Comprehensive Income (Loss) Components		Comprehensive Income				Where Net Income Is Presented

	For the Year-to-date periods ended:

	March 31, 2015

	Unrealized gains and losses on available-for-sale securities
			$	(90	)		Gain on Securities Transactions
			(90		)		Total before Tax
			35				Provision for Income Taxes

			$	(55	)		Net of Tax

	Amortization of defined benefit pension items
	Prior-service costs		$	13		(2)	Salaries and Employee Benefits

	Actuarial gains/(losses)		(192		)	(2)	Salaries and Employee Benefits
			(179		)		Total before Tax
			69				Provision for Income Taxes

			$	(110	)		Net of Tax

	Total reclassifications for the period		$	(165	)		Net of Tax


	March 31, 2014

	Unrealized gains and losses on available-for-sale securities
			$	—			Gain on Securities Transactions

			—				Total before Tax

			—				Provision for Income Taxes

			$	—			Net of Tax


	Amortization of defined benefit pension items
	Prior-service costs		22			(2)	Salaries and Employee Benefits

	Actuarial gains/(losses)		$	(116	)	(2)	Salaries and Employee Benefits
			(94		)		Total before Tax
			37				Provision for Income Taxes

			$	(57	)		Net of Tax

	Total reclassifications for the period		$	(57	)		Net of Tax


	(1) Amounts in parentheses indicate debits to profit/loss.
	(2) These accumulated other comprehensive income components are included in the computation of net periodic pension cost.

Stock_Based_Compensation_Plans1

Stock Based Compensation Plans (Tables)	3 Months Ended
Stock Based Compensation Plans (Tables)	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]	The following table presents a roll-forward of our stock option plans and grants issued during 2015:
	.


	Schedule of Share-based Compensation Arrangements
		Stock Option Plans
	Roll-Forward of Shares Outstanding:
	Outstanding at January 1, 2015	401,442
	Outstanding at January 1, 2015	401,442
	Granted	54,500
	Granted	54,500
	Exercised	(3,027		)
	Forfeited	—
	Forfeited	—
	Outstanding at March 31, 2015	452,915
	Outstanding at March 31, 2015	452,915
	Exercisable at Period-End	319,815
	Exercisable at Period-End	319,815
	Vested and Expected to Vest	133,100
	Vested and Expected to Vest	133,100

	Roll-Forward of Shares Outstanding - Weighted Average Exercise Price:
	Outstanding at January 1, 2015	$	22.66
	Outstanding at January 1, 2015	$	22.66
	Granted	25.86
	Granted	25.86
	Exercised	22.78
	Exercised	22.78
	Forfeited	—
	Forfeited	—
	Outstanding at March 31, 2015	23.04
	Outstanding at March 31, 2015	23.04
	Exercisable at Period-End	22.11
	Exercisable at Period-End	22.11
	Vested and Expected to Vest	25.28
	Vested and Expected to Vest	25.28

	Grants Issued During 2015 - Weighted Average Information:
	Fair Value	5.78
	Fair Value	5.78
	Fair Value Assumptions:
	Dividend Yield	3.9		%
	Expected Volatility	33.55		%
	Risk Free Interest Rate	1.57		%
	Expected Lives (in years)	7.66
	Expected Lives (in years)	7.66
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]	The following table presents information on the amounts expensed for the periods ended March 31, 2015 and 2014:


	Share-Based Compensation Expense
			For the Three Months Ended March 31,
			2015		2014
	Share-Based Compensation Expense		$	82	$	90
	Share-Based Compensation Expense		$	82	$	90

Retirement_Plans_Tables

Retirement Plans (Tables)	3 Months Ended
	Mar. 31, 2015
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Schedule of Defined Benefit Plans Disclosures [Table Text Block]	The following tables provide the components of net periodic benefit costs for the three-month period ended March 31:


					Select
		Employees'			Executive		Postretirement
		Pension			Retirement		Benefit
		Plan			Plan		Plans
	Net Periodic Benefit Cost
	For the Three Months Ended March 31, 2015:
	Service Cost	$	353		$	3	$	43

	Interest Cost	394			48		58

	Expected Return on Plan Assets	(808		)	—		—

	Amortization of Prior Service Cost (Credit)	(20		)	15		(8		)

	Amortization of Net Loss	138			30		24

	Net Periodic Benefit Cost	$	57		$	96	$	117


	Plan Contributions During the Period	$	—		$	115	$	47


	Estimated Future Contributions in the Current Fiscal Year	$	—		$	345	$	141


	For the Three Months Ended March 31, 2014:
	Service Cost	$	377		$	—	$	53

	Interest Cost	330			61		110

	Expected Return on Plan Assets	(722		)	—		—

	Amortization of Prior Service (Credit) Cost	(11		)	18		(29		)

	Amortization of Net Loss	86			23		7

	Net Periodic Benefit Cost	$	60		$	102	$	141


	Plan Contributions During the Period	$	—		$	119	$	142


	We are not required to make a contribution to our qualified pension plan in 2015, and currently, we do not expect to make a contribution in 2015. Arrow makes contributions to its other post-retirement benefit plans in an amount equal to benefit payments for the year.

Earnings_Per_Comon_Share_Table

Earnings Per Comon Share (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	The following table presents a reconciliation of the numerator and denominator used in the calculation of basic and diluted earnings per common share (“EPS”) for periods ended March 31, 2015 and 2014. All share and per share amounts have been adjusted for the September 2014 2% stock dividend.


	Earnings Per Share
		Year-to-Date Period Ended:
		March 31, 2015		March 31, 2014
	Earnings Per Share - Basic:
	Net Income	$	5,855	$	5,320

	Weighted Average Shares - Basic	12,633		12,601

	Earnings Per Share - Basic	$	0.46	$	0.42


	Earnings Per Share - Diluted:
	Net Income	$	5,855	$	5,320

	Weighted Average Shares - Basic	12,633		12,601

	Dilutive Average Shares Attributable to Stock Options	38		24

	Weighted Average Shares - Diluted	12,671		12,625

	Earnings Per Share - Diluted	$	0.46	$	0.42

	Antidilutive Shares Excluded from the Calculation	—		—
	of Earnings Per Share

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]	The table below presents the financial instrument's fair value and the amounts within the fair value hierarchy based on the lowest level of input that is significant to the fair value measurement:


	Fair Value of Assets and Liabilities Measured on a Recurring and Nonrecurring Basis
					Fair Value Measurements at Reporting Date Using:
		Fair Value			Quoted Prices			Significant Other			Significant Unobservable Inputs			Total Gains (Losses)
					In Active Markets for Identical Assets			Observable Inputs			(Level 3)
					(Level 1)			(Level 2)
	Fair Value of Assets and Liabilities Measured on a Recurring Basis:
	March 31, 2015
	Securities Available-for Sale:
	U.S. Agency Obligations	$	151,527		$	—		$	151,527		$	—

	State and Municipal Obligations	74,095			—			74,095			—

	Mortgage-Backed Securities - Residential	149,510			—			149,510			—

	Corporate and Other Debt Securities	16,756			—			16,756			—

	Mutual Funds and Equity Securities	1,245			—			1,245			—

	Total Securities Available-for-Sale	$	393,133		$	—		$	393,133		$	—

	December 31, 2014
	Securities Available-for Sale:
	U.S. Agency Obligations	$	137,603		$	—		$	137,603		$	—

	State and Municipal Obligations	81,730			—			81,730			—

	Mortgage-Backed Securities - Residential	128,827			—			128,827			—

	Corporate and Other Debt Securities	16,725			—			16,725			—

	Mutual Funds and Equity Securities	1,254			—			1,254			—

	Total Securities Available-for Sale	$	366,139		$	—		$	366,139		$	—

	March 31, 2014
	Securities Available-for Sale:
	U.S. Agency Obligations	$	121,220		$	—		$	121,220		$	—

	State and Municipal Obligations	125,410			—			125,410			—

	Mortgage-Backed Securities - Residential	164,541			—			164,541			—

	Corporate and Other Debt Securities	16,839			—			16,839			—

	Mutual Funds and Equity Securities	1,220			—			1,220			—

	Total Securities Available-for Sale	$	429,230		$	—		$	429,230		$	—


	Fair Value of Assets and Liabilities Measured on a Nonrecurring Basis:
	March 31, 2015
	Other Real Estate Owned and Repossessed Assets, Net	$	529		$	—		$	—		$	529		$	(15	)

	Collateral Dependent Impaired Loans	600			—			—			$	600		(149		)

	December 31, 2014

	Other Real Estate Owned and Repossessed Assets, Net	$	393		$	—		$	—		$	393		$	(15	)

	Collateral Dependent Impaired Loans	574			—			—			$	574		(109		)

March 31, 2014

Other Real Estate Owned and Repossessed Assets, Net	$	198		$	—		$	—		$	198		$	(52	)

Fair Value, by Balance Sheet Grouping [Table Text Block]	The following table presents a summary of the carrying amount, the fair value or an amount approximating fair value and the fair value hierarchy of Arrow’s financial instruments:


	Schedule of Fair Values by Balance Sheet Grouping
								Fair Value Hierarchy
		Carrying			Fair			Level 1			Level 2			Level 3
		Amount			Value
	March 31, 2015
	Cash and Cash Equivalents	$	111,595		$	111,595		$	111,595		$	—		$	—

	Securities Available-for-Sale	393,133			393,133			—			393,133			—

	Securities Held-to-Maturity	305,175			312,500			—			312,500			—

	Federal Home Loan Bank and Federal	4,806			4,806			4,806			—			—
	Reserve Bank Stock
	Net Loans	1,419,169			1,429,553			—			—			1,429,553

	Accrued Interest Receivable	6,698			6,698			6,698			—			—

	Deposits	2,018,704			2,016,098			1,820,165			195,933			—

	Federal Funds Purchased and Securities	15,895			15,895			15,895			—			—
	Sold Under Agreements to Repurchase
	Federal Home Loan Bank Term Advances	50,000			50,851			—			50,851			—

	Junior Subordinated Obligations Issued	20,000			20,000			—			20,000			—
	to Unconsolidated Subsidiary Trusts
	Accrued Interest Payable	289			289			289			—			—


	December 31, 2014
	Cash and Cash Equivalents	$	46,295		$	46,295		$	46,295		$	—		$	—

	Securities Available-for-Sale	366,139			366,139			—			366,139			—

	Securities Held-to-Maturity	302,024			308,566			—			308,566			—

	Federal Home Loan Bank and Federal	4,851			4,851			4,851			—			—
	Reserve Bank Stock
	Net Loans	1,397,698			1,405,454			—			—			1,405,454

	Accrued Interest Receivable	5,834			5,834			5,834			—			—

	Deposits	1,902,948			1,899,682			1,697,105			202,577			—

	Federal Funds Purchased and Securities	19,421			19,421			19,421			—			—
	Sold Under Agreements to Repurchase
	Federal Home Loan Bank Term Advances	51,000			51,258			41,000			10,258			—

	Junior Subordinated Obligations Issued	20,000			20,000			—			20,000			—
	to Unconsolidated Subsidiary Trusts
	Accrued Interest Payable	274			274			274			—			—


	March 31, 2014
	Cash and Cash Equivalents	$	76,050		$	76,050		$	76,050		$	—		$	—

	Securities Available-for-Sale	429,230			429,230			—			429,230			—

	Securities Held-to-Maturity	317,632			322,335			—			322,335			—

	Federal Home Loan Bank and Federal	3,896			3,896			3,896			—			—
	Reserve Bank Stock
Net Loans	1,295,787			1,306,043			—			—			1,306,043

Accrued Interest Receivable	6,808			6,808			6,808			—			—

Deposits	1,948,019			1,944,116			1,709,784			234,332			—

Federal Funds Purchased and Securities	13,787			13,787			13,787			—			—
Sold Under Agreements to Repurchase
Federal Home Loan Bank Term Advances	20,000			20,519			—			20,519			—

Junior Subordinated Obligations Issued	20,000			20,000			—			20,000			—
to Unconsolidated Subsidiary Trusts
Accrued Interest Payable	405			405			405			—			—

Investment_Securities_Availabl

Investment Securities Available for Sale (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	$387,640	$361,962	$424,900
Available-for-Sale	393,133	366,139	429,230
Gross Unrealized Gains	5,735	4,636	5,066
Gross Unrealized Losses	243	459	736
Available-For-Sale Securities, Pledged as Collateral	284,708	267,384	329,039
Maturities of Debt Securities, at Amortized Cost
Within One Year	34,985
From 1 - 5 Years	327,321
From 5 - 10 Years	22,573
Over 10 Years	1,640
Maturities of Debt Securities at Fair Value
Within One Year	35,057
From 1 - 5 Years	332,019
From 5 - 10 Years	23,372
Over 10 Years	1,440
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	0	43,022	85,196
12 Months or Longer	26,242	54,339	17,232
Total	26,242	97,361	102,428
Number of Securities in a Continuous Loss Position, in number of securities	106	105	125
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	0	48	425
12 Months or Longer	243	411	311
Total	243	459	736
U.S. Agency Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Gains	1,049	208	3
Gross Unrealized Losses	22	145	260
Maturities of Debt Securities, at Amortized Cost
Within One Year	5,000
From 1 - 5 Years	145,500
From 5 - 10 Years	0
Over 10 Years	0
Maturities of Debt Securities at Fair Value
Within One Year	5,005
From 1 - 5 Years	146,522
From 5 - 10 Years	0
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	0	39,631	50,778
12 Months or Longer	13,937	28,020	6,124
Total	13,937	67,651	56,902
Number of Securities in a Continuous Loss Position, in number of securities	46	22	16
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	0	48	222
12 Months or Longer	22	97	38
Total	22	145	260
U.S. Agency Obligations [Member] \| U.S. Government Agency Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	150,500	137,540	121,477
Available-for-Sale	151,527	137,603	121,220
State and Municipal Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	73,886	81,582	125,165
Available-for-Sale	74,095	81,730	125,410
Gross Unrealized Gains	217	187	333
Gross Unrealized Losses	9	39	88
Maturities of Debt Securities, at Amortized Cost
Within One Year	23,532
From 1 - 5 Years	48,471
From 5 - 10 Years	1,243
Over 10 Years	640
Maturities of Debt Securities at Fair Value
Within One Year	23,573
From 1 - 5 Years	48,638
From 5 - 10 Years	1,244
Over 10 Years	640
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	0	3,309	17,937
12 Months or Longer	6,581	14,035	3,653
Total	6,581	17,344	21,590
Number of Securities in a Continuous Loss Position, in number of securities	7	65	87
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	0	0	72
12 Months or Longer	9	39	16
Total	9	39	88
Mortgage-Backed Securities - Residential [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	145,185	124,732	160,023
Available-for-Sale	149,510	128,827	164,541
Gross Unrealized Gains	4,325	4,100	4,616
Gross Unrealized Losses	0	5	98
Maturities of Debt Securities, at Amortized Cost
Within One Year	1,515
From 1 - 5 Years	122,340
From 5 - 10 Years	21,330
Over 10 Years	0
Maturities of Debt Securities at Fair Value
Within One Year	1,532
From 1 - 5 Years	125,850
From 5 - 10 Years	22,128
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	0	82	10,613
12 Months or Longer	22	1,546	4,063
Total	22	1,628	14,676
Number of Securities in a Continuous Loss Position, in number of securities	31	3	9
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	0	0	81
12 Months or Longer	0	5	17
Total	0	5	98
Mortgage-Backed Securities - Residential [Member] \| U.S. Government Agency Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	34,100	23,000	30,600
Available-for-Sale	35,000	23,600	31,300
Mortgage-Backed Securities - Residential [Member] \| US Government-sponsored Enterprises Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	111,100	101,700	129,400
Available-for-Sale	114,500	105,200	133,200
Corporate and Other Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	16,949	16,988	17,115
Available-for-Sale	16,756	16,725	16,839
Gross Unrealized Gains	19	7	14
Gross Unrealized Losses	212	270	290
Maturities of Debt Securities, at Amortized Cost
Within One Year	4,938
From 1 - 5 Years	11,010
From 5 - 10 Years	0
Over 10 Years	1,000
Maturities of Debt Securities at Fair Value
Within One Year	4,947
From 1 - 5 Years	11,009
From 5 - 10 Years	0
Over 10 Years	800
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	0	0	5,868
12 Months or Longer	5,702	10,738	3,392
Total	5,702	10,738	9,260
Number of Securities in a Continuous Loss Position, in number of securities	22	15	13
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	0	0	50
12 Months or Longer	212	270	240
Total	212	270	290
Mutual Funds and Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	1,120	1,120	1,120
Available-for-Sale	1,245	1,254	1,220
Gross Unrealized Gains	125	134	100
Gross Unrealized Losses	0	0	0
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	0	0	0
12 Months or Longer	0	0	0
Total	0	0	0
Number of Securities in a Continuous Loss Position, in number of securities	0	0	0
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	0	0	0
12 Months or Longer	0	0	0
Total	$0	$0	$0

Investment_Securities_Held_to_

Investment Securities Held to Maturity (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Schedule of Held-to-maturity Securities [Line Items]
Held-to-Maturity	$305,175	$302,024	$317,632
Held-to-Maturity Securities, at Fair Value	312,500	308,566	322,335
Gross Unrealized Gains	7,451	6,705	5,316
Gross Unrealized Losses	126	163	613
Held-To-Maturity Securities, Pledged as Collateral	285,132	282,640	316,632
Maturities of Debt Securities at Amortized Cost
Within One Year	35,926
From 1 - 5 Years	132,842
From 5 - 10 Years	132,112
Over 10 Years	4,295
Maturities of Debt Securities, at Fair Value
Within One Year	35,968
From 1 - 5 Years	136,008
From 5 - 10 Years	136,153
Over 10 Years	4,371
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	0	6,724	62,745
12 Months or Longer	16,010	16,033	5,112
Total	16,010	22,757	67,857
Number of Securities in a Continuous Loss Position, in number of securities	592	75	103
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	0	25	572
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	126	138	41
Total	126	163	613
State and Municipal Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-Maturity	195,951	188,472	190,847
Held-to-Maturity Securities, at Fair Value	200,578	193,252	195,524
Gross Unrealized Gains	4,753	4,935	5,042
Gross Unrealized Losses	126	155	365
Maturities of Debt Securities at Amortized Cost
Within One Year	35,926
From 1 - 5 Years	89,022
From 5 - 10 Years	67,708
Over 10 Years	3,295
Maturities of Debt Securities, at Fair Value
Within One Year	35,968
From 1 - 5 Years	91,192
From 5 - 10 Years	70,047
Over 10 Years	3,371
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	0	2,143	19,696
12 Months or Longer	16,010	16,033	5,112
Total	16,010	18,176	24,808
Number of Securities in a Continuous Loss Position, in number of securities	585	74	86
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	0	17	324
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	126	138	41
Total	126	155	365
Mortgage-Backed Securities - Residential [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-Maturity	108,224	112,552	125,785
Held-to-Maturity Securities, at Fair Value	110,922	114,314	125,811
Gross Unrealized Gains	2,698	1,770	274
Gross Unrealized Losses	0	8	248
Maturities of Debt Securities at Amortized Cost
Within One Year	0
From 1 - 5 Years	43,820
From 5 - 10 Years	64,404
Over 10 Years	0
Maturities of Debt Securities, at Fair Value
Within One Year	0
From 1 - 5 Years	44,816
From 5 - 10 Years	66,106
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	0	4,581	43,049
12 Months or Longer	0	0	0
Total	0	4,581	43,049
Number of Securities in a Continuous Loss Position, in number of securities	7	1	17
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	0	8	248
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0	0
Total	0	8	248
Mortgage-Backed Securities - Residential [Member] \| U.S. Government Agency Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-Maturity	29,900	4,400	4,800
Held-to-Maturity Securities, at Fair Value	30,600	4,500	4,800
Mortgage-Backed Securities - Residential [Member] \| US Government-sponsored Enterprises Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-Maturity	78,300	108,100	121,000
Held-to-Maturity Securities, at Fair Value	80,300	109,800	121,000
Corporate and Other Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-Maturity	1,000	1,000	1,000
Held-to-Maturity Securities, at Fair Value	1,000	1,000	1,000
Gross Unrealized Gains	0	0	0
Gross Unrealized Losses	0	0	0
Maturities of Debt Securities at Amortized Cost
Within One Year	0
From 1 - 5 Years	0
From 5 - 10 Years	0
Over 10 Years	1,000
Maturities of Debt Securities, at Fair Value
Within One Year	0
From 1 - 5 Years	0
From 5 - 10 Years	0
Over 10 Years	1,000
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	0	0	0
12 Months or Longer	0	0	0
Total	0	0	0
Number of Securities in a Continuous Loss Position, in number of securities	0	0	0
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	0	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0	0
Total	$0	$0	$0

Loans_Loan_Categories_and_Past

Loans Loan Categories and Past Due Loans(Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	$12,158	$13,468	$12,708
Current Loans	1,422,636	1,399,800	1,297,715
Loans and Leases Receivable, Gross	1,434,794	1,413,268	1,310,423
Loans 90 Days or More Past Due and Still Accruing Interest	580	537	347
Nonaccrual Loans	6,998	6,899	6,283
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	6,187	5,205	6,718
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	995	2,881	1,782
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	4,976	5,382	4,208
Commercial [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	702	623	1,205
Current Loans	99,208	98,888	88,671
Loans and Leases Receivable, Gross	99,910	99,511	89,876
Loans 90 Days or More Past Due and Still Accruing Interest	0	0	0
Nonaccrual Loans	409	473	182
Commercial [Member] \| Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	370	124	597
Commercial [Member] \| Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	48	154	579
Commercial [Member] \| Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	284	345	29
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	2,093	2,271	3,403
Current Loans	337,194	337,841	333,464
Loans and Leases Receivable, Gross	339,287	340,112	336,867
Loans 90 Days or More Past Due and Still Accruing Interest	0	0	0
Nonaccrual Loans	2,070	2,071	2,042
Commercial Real Estate Portfolio Segment [Member] \| Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	255	432	1,381
Commercial Real Estate Portfolio Segment [Member] \| Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	0	7	237
Commercial Real Estate Portfolio Segment [Member] \| Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	1,838	1,832	1,785
Consumer Loans Financing [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	3,932	5,598	3,392
Current Loans	436,970	431,443	405,012
Loans and Leases Receivable, Gross	440,902	437,041	408,404
Loans 90 Days or More Past Due and Still Accruing Interest	0	0	0
Nonaccrual Loans	337	415	372
Consumer Loans Financing [Member] \| Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	3,357	4,167	2,714
Consumer Loans Financing [Member] \| Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	428	1,225	528
Consumer Loans Financing [Member] \| Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	147	206	150
Residential [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	5,431	4,976	4,708
Current Loans	549,264	531,628	470,568
Loans and Leases Receivable, Gross	554,695	536,604	475,276
Loans 90 Days or More Past Due and Still Accruing Interest	580	537	347
Nonaccrual Loans	4,182	3,940	3,687
Residential [Member] \| Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	2,205	482	2,026
Residential [Member] \| Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	519	1,495	438
Residential [Member] \| Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	$2,707	$2,999	$2,244

Loans_Allowance_for_Loan_Losse

Loans Allowance for Loan Losses (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	$15,570	$14,434
Charge-offs	-290	-336
Recoveries	70	80
Provision	275	458
Allowance for Loan Losses, Ending Balance	15,625	14,636
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	149	0	109
Allowance for loan losses - Loans Collectively Evaluated for Impairment	15,476	14,636	15,461
Ending Loan Balance - Individually Evaluated for Impairment	4,354	4,081	4,341
Ending Loan Balance - Collectively Evaluated for Impairment	1,430,440	1,306,342	1,408,927
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	2,100	1,886
Charge-offs	-16	-123
Recoveries	7	19
Provision	72	15
Allowance for Loan Losses, Ending Balance	2,163	1,797
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	0	0	0
Allowance for loan losses - Loans Collectively Evaluated for Impairment	2,163	1,797	2,100
Ending Loan Balance - Individually Evaluated for Impairment	459	214	494
Ending Loan Balance - Collectively Evaluated for Impairment	99,451	89,662	99,017
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	4,128	3,962
Charge-offs	0	0
Recoveries	0	0
Provision	-295	236
Allowance for Loan Losses, Ending Balance	3,833	4,198
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	0	0	0
Allowance for loan losses - Loans Collectively Evaluated for Impairment	3,833	4,198	4,128
Ending Loan Balance - Individually Evaluated for Impairment	1,492	1,810	1,492
Ending Loan Balance - Collectively Evaluated for Impairment	337,795	335,057	338,620
Consumer Loans Financing [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	5,210	4,478
Charge-offs	185	197
Recoveries	63	61
Provision	179	244
Allowance for Loan Losses, Ending Balance	5,267	4,586
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	0	0	0
Allowance for loan losses - Loans Collectively Evaluated for Impairment	5,267	4,586	5,210
Ending Loan Balance - Individually Evaluated for Impairment	107	144	118
Ending Loan Balance - Collectively Evaluated for Impairment	440,795	408,260	436,923
Residential [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	3,369	3,026
Charge-offs	-89	-16
Recoveries	0	0
Provision	349	67
Allowance for Loan Losses, Ending Balance	3,629	3,077
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	149	0	109
Allowance for loan losses - Loans Collectively Evaluated for Impairment	3,480	3,077	3,260
Ending Loan Balance - Individually Evaluated for Impairment	2,296	1,913	2,237
Ending Loan Balance - Collectively Evaluated for Impairment	552,399	473,363	534,367
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	763	1,082
Charge-offs	0	0
Recoveries	0	0
Provision	-30	-104
Allowance for Loan Losses, Ending Balance	733	978
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Allowance for loan losses - Loans Individually Evaluated for Impairment	0	0	0
Allowance for loan losses - Loans Collectively Evaluated for Impairment	733	978	763
Ending Loan Balance - Individually Evaluated for Impairment	0	0	0
Ending Loan Balance - Collectively Evaluated for Impairment	$0	$0	$0

Loans_Credit_Quality_Indicator

Loans Credit Quality Indicators (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Satisfactory [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	$403,187	$403,696	$397,821
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	5,424	6,160	1,574
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	30,586	29,767	27,348
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	0	0	0
Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	990,497	968,753	879,273
Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	5,100	4,892	4,407
Commercial [Member] \| Satisfactory [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	85,597	85,949	82,263
Commercial [Member] \| Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	2,575	2,442	960
Commercial [Member] \| Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	11,738	11,120	6,653
Commercial [Member] \| Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	0	0	0
Commercial Real Estate Portfolio Segment [Member] \| Satisfactory [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	317,590	317,747	315,558
Commercial Real Estate Portfolio Segment [Member] \| Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	2,849	3,718	614
Commercial Real Estate Portfolio Segment [Member] \| Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	18,848	18,647	20,695
Commercial Real Estate Portfolio Segment [Member] \| Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	0	0	0
Consumer Loans Financing [Member] \| Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	440,565	436,626	408,031
Consumer Loans Financing [Member] \| Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	337	415	373
Residential [Member] \| Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	549,932	532,127	471,242
Residential [Member] \| Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	$4,763	$4,477	$4,034

Loans_Impaired_Loans_Details

Loans Impaired Loans (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Recorded Investment [Abstract]
With No Related Allowance	$3,755	$4,081	$3,782
With a Related Allowance	599	0	559
Unpaid Principal Balance [Abstract]
With No Related Allowance	3,755	4,081	3,782
With a Related Allowance	599	0	559
Average Recorded Balance [Abstract]
With No Related Allowance	3,770	4,286
With a Related Allowance	579	0
Interest Income Recognized [Abstract]
With No Related Allowance	4	16
With a Related Allowance	0	0
Cash Basis Income [Abstract]
With No Related Allowance	0	0
With a Related Allowance	0	0
Commercial [Member]
Recorded Investment [Abstract]
With No Related Allowance	459	214	494
With a Related Allowance	0	0	0
Unpaid Principal Balance [Abstract]
With No Related Allowance	459	214	494
With a Related Allowance	0	0	0
Average Recorded Balance [Abstract]
With No Related Allowance	477	218
With a Related Allowance	0	0
Interest Income Recognized [Abstract]
With No Related Allowance	2	3
With a Related Allowance	0	0
Cash Basis Income [Abstract]
With No Related Allowance	0	0
With a Related Allowance	0	0
Commercial Real Estate Portfolio Segment [Member]
Recorded Investment [Abstract]
With No Related Allowance	1,492	1,810	1,492
With a Related Allowance	0	0	0
Unpaid Principal Balance [Abstract]
With No Related Allowance	1,492	1,810	1,492
With a Related Allowance	0	0	0
Average Recorded Balance [Abstract]
With No Related Allowance	1,492	1,798
With a Related Allowance	0	0
Interest Income Recognized [Abstract]
With No Related Allowance	0	10
With a Related Allowance	0	0
Cash Basis Income [Abstract]
With No Related Allowance	0	0
With a Related Allowance	0	0
Consumer Loans Financing [Member]
Recorded Investment [Abstract]
With No Related Allowance	107	144	118
With a Related Allowance	0	0	0
Unpaid Principal Balance [Abstract]
With No Related Allowance	107	144	118
With a Related Allowance	0	0	0
Average Recorded Balance [Abstract]
With No Related Allowance	113	159
With a Related Allowance	0	0
Interest Income Recognized [Abstract]
With No Related Allowance	1	2
With a Related Allowance	0	0
Cash Basis Income [Abstract]
With No Related Allowance	0	0
With a Related Allowance	0	0
Residential [Member]
Recorded Investment [Abstract]
With No Related Allowance	1,697	1,913	1,678
With a Related Allowance	599	0	559
Unpaid Principal Balance [Abstract]
With No Related Allowance	1,697	1,913	1,678
With a Related Allowance	599	0	559
Average Recorded Balance [Abstract]
With No Related Allowance	1,688	2,111
With a Related Allowance	579	0
Interest Income Recognized [Abstract]
With No Related Allowance	1	1
With a Related Allowance	0	0
Cash Basis Income [Abstract]
With No Related Allowance	0	0
With a Related Allowance	$0	$0

Loans_Loans_Modified_in_Troubl

Loans Loans Modified in Trouble Debt Restructurings (Details) (Entity Loan Modification Program [Member], Payment Deferral [Member], USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Financing Receivable, Modifications [Line Items]
Number of Loans	1	1
Pre-Modification Outstanding Recorded Investment	$2	$2
Post-Modification Outstanding Recorded Investment	2	2
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	0	0
Pre-Modification Outstanding Recorded Investment	0	0
Post-Modification Outstanding Recorded Investment	0	0
Commercial [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	0	0
Pre-Modification Outstanding Recorded Investment	0	0
Post-Modification Outstanding Recorded Investment	0	0
Consumer Loans Financing [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	1	1
Pre-Modification Outstanding Recorded Investment	2	2
Post-Modification Outstanding Recorded Investment	2	2
Residential [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	0	0
Pre-Modification Outstanding Recorded Investment	0	0
Post-Modification Outstanding Recorded Investment	$0	$0

Loans_Supplemental_Loan_Inform

Loans Supplemental Loan Information (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Loans and Leases Receivable, Other Information [Abstract]
Loans Held-for-sale	$828	$398	$502

Guarantees_Details

Guarantees (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Commitments to Extend Credit [Member]
Loan Commitments and Letters of Credit [Line Items]
Notional Amount	$259,634	$249,803	$235,549
Fair Value	0	0	0
Standby Letters of Credit [Member]
Loan Commitments and Letters of Credit [Line Items]
Notional Amount	3,193	3,317	3,333
Fair Value	$37	$39	$56

Comprehensive_Income_Other_Com

Comprehensive Income Other Comprehensive Income (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Schedule of Comprehensive Income [Line Items]
Other comprehensive income, before reclassifications, net of tax	$745	[1]	$241	[1]
Reclassification from Accumulated Other Comprehensive Income, net of tax	165	[1]	57	[1]
Other Comprehensive Income, before Tax	1,494		493
Other Comprehensive Income, Tax	-584		-195
Other Comprehensive Income	910	[1]	298	[1]
Unrealized Gains and Losses on Available for Sale Securities [Member]
Schedule of Comprehensive Income [Line Items]
Other Comprehensive Income Loss Before Reclassifications Before Tax	1,225		399
Other Comprehensive Income Loss Before Reclassifications Tax (Expense) Benefit	-480		-158
Other comprehensive income, before reclassifications, net of tax	745		241
Reclassification From Accumulated Other Comprehensive Income Current Period Before Tax	90		0
Reclassification From Accumulated Other Comprehensive Income Current Period Tax (Expense) Benefit	-35		0
Reclassification from Accumulated Other Comprehensive Income, net of tax	55		0
Other Comprehensive Income	800	[1]	241	[1]
Amortization of Net Retirement Plan Actuarial Loss [Member]
Schedule of Comprehensive Income [Line Items]
Other comprehensive income, before reclassifications, net of tax	0	[1]	0	[1]
Reclassification From Accumulated Other Comprehensive Income Current Period Before Tax	192		116
Reclassification From Accumulated Other Comprehensive Income Current Period Tax (Expense) Benefit	-75		-46
Reclassification from Accumulated Other Comprehensive Income, net of tax	117		70
Other Comprehensive Income	117	[1]	70	[1]
Accretion of Net Retirement Plan Prior Service Credit [Member]
Schedule of Comprehensive Income [Line Items]
Other comprehensive income, before reclassifications, net of tax	0	[1]	0	[1]
Reclassification From Accumulated Other Comprehensive Income Current Period Before Tax	-13		-22
Reclassification From Accumulated Other Comprehensive Income Current Period Tax (Expense) Benefit	6		9
Reclassification from Accumulated Other Comprehensive Income, net of tax	-7		-13
Other Comprehensive Income	($7)	[1]	($13)	[1]

[1]	All amounts are net of tax. Amounts in parentheses indicate debits.

Comprehensive_Income_Changes_i

Comprehensive Income Changes in Accumulated Other Comprehensive Income By Component (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014		Dec. 31, 2014		Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Loss	($6,256)	[1]	($4,075)	[1]	($7,166)	[1]	($4,373)	[1]
Other comprehensive income, before reclassifications, net of tax	745	[1]	241	[1]
Reclassification from Accumulated Other Comprehensive Income, net of tax	165	[1]	57	[1]
Other Comprehensive Income	910	[1]	298	[1]
Unrealized Gains and Losses on Available for Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Loss	3,339	[1]	2,615	[1]	2,539	[1]	2,374	[1]
Other comprehensive income, before reclassifications, net of tax	745		241
Reclassification from Accumulated Other Comprehensive Income, net of tax	55		0
Other Comprehensive Income	800	[1]	241	[1]
Amortization of Net Retirement Plan Actuarial Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Loss	-9,138	[1]	-6,627	[1]	-9,255	[1]	-6,697	[1]
Other comprehensive income, before reclassifications, net of tax	0	[1]	0	[1]
Reclassification from Accumulated Other Comprehensive Income, net of tax	117		70
Other Comprehensive Income	117	[1]	70	[1]
Accretion of Net Retirement Plan Prior Service Credit [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Loss	-457	[1]	-63	[1]	-450	[1]	-50	[1]
Other comprehensive income, before reclassifications, net of tax	0	[1]	0	[1]
Reclassification from Accumulated Other Comprehensive Income, net of tax	-7		-13
Other Comprehensive Income	($7)	[1]	($13)	[1]

[1]	All amounts are net of tax. Amounts in parentheses indicate debits.

Comprehensive_Income_Reclassif

Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
INCOME BEFORE PROVISION FOR INCOME TAXES	$8,530		$7,634
Provision for Income Taxes	2,675		2,314
Net Income	-165	[1]	-57	[1]
Reclassification out of Accumulated Other Comprehensive Income [Member] \| Unrealized Gains and Losses on Available for Sale Securities [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Reclassification Adjustment for Securities Gains Included in Net Income, Before-Tax Amount	-90	[1]	0	[1]
INCOME BEFORE PROVISION FOR INCOME TAXES	-90	[1]	0	[1]
Provision for Income Taxes	35	[1]	0	[1]
Net Income	-55	[1]	0	[1]
Reclassification out of Accumulated Other Comprehensive Income [Member] \| Accumulated Defined Benefit Plans Adjustment [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amortization of Defined Benefit Pension Items, Prior-Service Costs, Before Tax	13	[1],[2]	22	[1],[2]
Amortization of Net Retirement Plan Actuarial Loss, Before-Tax Amount	-192	[1],[2]	-116	[1],[2]
INCOME BEFORE PROVISION FOR INCOME TAXES	-179	[1]	-94	[1]
Provision for Income Taxes	69	[1]	37	[1]
Net Income	($110)	[1]	($57)	[1]

[1]	Amounts in parentheses indicate debits to profit/loss.
[2]	These accumulated other comprehensive income components are included in the computation of net periodic pension cost.

Stock_Based_Compensation_Plan_

Stock Based Compensation Plan (Details) (USD $)	3 Months Ended
Stock Based Compensation Plan (Details) (USD $)	Mar. 31, 2015	Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, Beginning of Period, in shares	401,442
Granted, in shares	54,500
Stock Options Exercised, in shares	-3,027	-19,308
Forfeited, in shares	0
Outstanding, End of Period, in shares	452,915
Exercisable at Period End, in shares	319,815
Vested and Expected to Vest, in shares	133,100
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding at Beginning of Period, in dollars per share	$22.66
Granted, in dollars per share	$25.86
Excercised, in dollars per share	$22.78
Forfeited, in dollars per share	$0
Outstanding, End of Period, in dollars per share	$23.04
Exercisable at Period End, in dollars per share	$22.11
Vested and Expected to Vest, in dollars per share	$25.28
Fair Value, in dollars per share	$5.78
Dividend Yield	3.90%
Expected Volatility	33.55%
Risk Free Interest Rate	1.57%
Expected Lives, in years	7 years 7 months 28 days

StockBased_Compensation_Expens

Stock-Based Compensation Expense (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Compensation Expense	$82	$90

Retirement_Plans_Details

Retirement Plans (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Employees' Pension Plan [Member]
Net Periodic Benefit Cost [Line Items]
Service Cost	$353		$377
Interest Cost	394		330
Expected Return on Plan Assets	-808		-722
Amortization of Prior Service (Credit) Cost	-20		-11
Amortization of Net Loss	138		86
Net Periodic Benefit Cost	57		60
Contributions to Retirement Benefits Plans	0		0
Estimated Future Contributions in the Current Fiscal Year		0
Select Executive Retirement Plan [Member]
Net Periodic Benefit Cost [Line Items]
Service Cost	3		0
Interest Cost	48		61
Expected Return on Plan Assets	0		0
Amortization of Prior Service (Credit) Cost	15		18
Amortization of Net Loss	30		23
Net Periodic Benefit Cost	96		102
Contributions to Retirement Benefits Plans	115		119
Estimated Future Contributions in the Current Fiscal Year		345
Post-Retirement Benefit Plans [Member]
Net Periodic Benefit Cost [Line Items]
Service Cost	43		53
Interest Cost	58		110
Expected Return on Plan Assets	0		0
Amortization of Prior Service (Credit) Cost	-8		-29
Amortization of Net Loss	24		7
Net Periodic Benefit Cost	117		141
Contributions to Retirement Benefits Plans	47		142
Estimated Future Contributions in the Current Fiscal Year		$141

Earnings_Per_Comon_Share_Detai

Earnings Per Comon Share (Details) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Earnings Per Share [Abstract]
Net Income	$5,855		$5,320
Basic, in shares	12,633	[1]	12,601	[1]
Basic Earnings, in dollars per share	$0.46	[1]	$0.42	[1]
Dilutive Average Shares Attributable to Stock Options, in shares	38	[1]	24
Diluted, in shares	12,671	[1]	12,625	[1],[2]
Diluted Earnings, in dollars per share	$0.46	[1]	$0.42	[1]
Antidilutive Securities Excluded from the Calculation of Earnings Per Share, in shares	0	[1]	0	[2]

[1]	Share and Per Share Amounts have been restated for the September 2014 2% stock dividend.
[2]	All share and per share amounts have been adjusted for the September 2014 2% stock dividend

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments Fair Value - Recurring and Nonrecurring (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale	$393,133	$366,139	$429,230
Fair Value of Assets and Liabilities Measured on a Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale	393,133	366,139	429,230
Fair Value of Assets and Liabilities Measured on a Recurring Basis [Member] \| Quoted Prices In Active Markets for Indentical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale	0	0	0
Fair Value of Assets and Liabilities Measured on a Recurring Basis [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale	393,133	366,139	429,230
Fair Value of Assets and Liabilities Measured on a Recurring Basis [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale	0	0	0
Fair Value of Assets and Liabilities Measured on a Nonrecurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Real Estate and Repossessed Assets, Net	529	393	198
Impaired Loans	600
Fair Value of Assets and Liabilities Measured on a Nonrecurring Basis [Member] \| Quoted Prices In Active Markets for Indentical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Real Estate and Repossessed Assets, Net	0	0	0
Impaired Loans	0
Fair Value of Assets and Liabilities Measured on a Nonrecurring Basis [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Real Estate and Repossessed Assets, Net	0	0	0
Impaired Loans	0
Fair Value of Assets and Liabilities Measured on a Nonrecurring Basis [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Real Estate and Repossessed Assets, Net	529	393	198
Impaired Loans	600
Fair Value of Assets and Liabilities Measured on a Nonrecurring Basis [Member] \| Total Gains (Losses) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Real Estate and Repossessed Assets, Net	-15	-15	-52
Impaired Loans	-149
U.S. Agency Obligations [Member] \| Fair Value of Assets and Liabilities Measured on a Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale	151,527	137,603	121,220
U.S. Agency Obligations [Member] \| Fair Value of Assets and Liabilities Measured on a Recurring Basis [Member] \| Quoted Prices In Active Markets for Indentical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale	0	0	0
U.S. Agency Obligations [Member] \| Fair Value of Assets and Liabilities Measured on a Recurring Basis [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale	151,527	137,603	121,220
U.S. Agency Obligations [Member] \| Fair Value of Assets and Liabilities Measured on a Recurring Basis [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale	0	0	0
State and Municipal Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale	74,095	81,730	125,410
State and Municipal Obligations [Member] \| Fair Value of Assets and Liabilities Measured on a Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale	74,095	81,730	125,410
State and Municipal Obligations [Member] \| Fair Value of Assets and Liabilities Measured on a Recurring Basis [Member] \| Quoted Prices In Active Markets for Indentical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale	0	0	0
State and Municipal Obligations [Member] \| Fair Value of Assets and Liabilities Measured on a Recurring Basis [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale	74,095	81,730	125,410
State and Municipal Obligations [Member] \| Fair Value of Assets and Liabilities Measured on a Recurring Basis [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale	0	0	0
Mortgage-Backed Securities - Residential [Member] \| Fair Value of Assets and Liabilities Measured on a Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale	149,510	128,827	164,541
Mortgage-Backed Securities - Residential [Member] \| Fair Value of Assets and Liabilities Measured on a Recurring Basis [Member] \| Quoted Prices In Active Markets for Indentical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale	0	0	0
Mortgage-Backed Securities - Residential [Member] \| Fair Value of Assets and Liabilities Measured on a Recurring Basis [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale	149,510	128,827	164,541
Mortgage-Backed Securities - Residential [Member] \| Fair Value of Assets and Liabilities Measured on a Recurring Basis [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale	0	0	0
Corporate and Other Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale	16,756	16,725	16,839
Corporate and Other Debt Securities [Member] \| Fair Value of Assets and Liabilities Measured on a Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale	16,756	16,725	16,839
Corporate and Other Debt Securities [Member] \| Fair Value of Assets and Liabilities Measured on a Recurring Basis [Member] \| Quoted Prices In Active Markets for Indentical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale	0	0	0
Corporate and Other Debt Securities [Member] \| Fair Value of Assets and Liabilities Measured on a Recurring Basis [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale	16,756	16,725	16,839
Corporate and Other Debt Securities [Member] \| Fair Value of Assets and Liabilities Measured on a Recurring Basis [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale	0	0	0
Mutual Funds and Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale	1,245	1,254	1,220
Mutual Funds and Equity Securities [Member] \| Fair Value of Assets and Liabilities Measured on a Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale	1,245	1,254	1,220
Mutual Funds and Equity Securities [Member] \| Fair Value of Assets and Liabilities Measured on a Recurring Basis [Member] \| Quoted Prices In Active Markets for Indentical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale	0	0	0
Mutual Funds and Equity Securities [Member] \| Fair Value of Assets and Liabilities Measured on a Recurring Basis [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale	1,245	1,254	1,220
Mutual Funds and Equity Securities [Member] \| Fair Value of Assets and Liabilities Measured on a Recurring Basis [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale	$0	$0	$0

Fair_Value_of_Financial_Instru3

Fair Value of Financial Instruments Fair Value by Balance Sheet Grouping (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents	$111,595	$46,295	$76,050	$49,980
Available-for-Sale	393,133	366,139	429,230
Held-to-Maturity	305,175	302,024	317,632
Held-to-Maturity Securities, at Fair Value	312,500	308,566	322,335
Federal Home Loan Bank and Federal Reserve Bank Stock	4,806	4,851	3,896
Net Loans	1,419,169	1,397,698	1,295,787
Deposits	2,018,704	1,902,948	1,948,019
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	15,895	19,421	13,787
Federal Home Loan Bank Term Advances	50,000	10,000	20,000
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	20,000	20,000	20,000
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents	111,595	46,295	76,050
Available-for-Sale	393,133	366,139	429,230
Held-to-Maturity	305,175	302,024	317,632
Federal Home Loan Bank and Federal Reserve Bank Stock	4,806	4,851	3,896
Net Loans	1,419,169	1,397,698	1,295,787
Accrued Interest Receivable	6,698	5,834	6,808
Deposits	2,018,704	1,902,948	1,948,019
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	15,895	19,421	13,787
Federal Home Loan Bank Term Advances	50,000	51,000	20,000
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	20,000	20,000	20,000
Accrued Interest Payable	289	274	405
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	111,595	46,295	76,050
Available-for-Sale	393,133	366,139	429,230
Held-to-Maturity Securities, at Fair Value	312,500	308,566	322,335
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value Disclosure	4,806	4,851	3,896
Net Loans, Fair Value Disclosure	1,429,553	1,405,454	1,306,043
Accrued Interest Receivable, Fair Value Disclosure	6,698	5,834	6,808
Deposits, Fair Value Disclosure	2,016,098	1,899,682	1,944,116
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Fair Value Disclosure	15,895	19,421	13,787
Federal Home Loan Bank Term Advances, Fair Value Disclosure	50,851	51,258	20,519
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	20,000	20,000	20,000
Accrued Interest Payable, Fair Value Disclosure	289	274	405
Quoted Prices In Active Markets for Indentical Assets (Level 1) [Member] \| Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	111,595	46,295	76,050
Available-for-Sale	0	0	0
Held-to-Maturity Securities, at Fair Value	0	0	0
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value Disclosure	4,806	4,851	3,896
Net Loans, Fair Value Disclosure	0	0	0
Accrued Interest Receivable, Fair Value Disclosure	6,698	5,834	6,808
Deposits, Fair Value Disclosure	1,820,165	1,697,105	1,709,784
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Fair Value Disclosure	15,895	19,421	13,787
Federal Home Loan Bank Term Advances, Fair Value Disclosure	0	41,000	0
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	0	0	0
Accrued Interest Payable, Fair Value Disclosure	289	274	405
Significant Other Observable Inputs (Level 2) [Member] \| Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0	0	0
Available-for-Sale	393,133	366,139	429,230
Held-to-Maturity Securities, at Fair Value	312,500	308,566	322,335
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value Disclosure	0	0	0
Net Loans, Fair Value Disclosure	0	0	0
Accrued Interest Receivable, Fair Value Disclosure	0	0	0
Deposits, Fair Value Disclosure	195,933	202,577	234,332
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Fair Value Disclosure	0	0	0
Federal Home Loan Bank Term Advances, Fair Value Disclosure	50,851	10,258	20,519
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	20,000	20,000	20,000
Accrued Interest Payable, Fair Value Disclosure	0	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0	0	0
Available-for-Sale	0	0	0
Held-to-Maturity Securities, at Fair Value	0	0	0
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value Disclosure	0	0	0
Net Loans, Fair Value Disclosure	1,429,553	1,405,454	1,306,043
Accrued Interest Receivable, Fair Value Disclosure	0	0	0
Deposits, Fair Value Disclosure	0	0	0
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Fair Value Disclosure	0	0	0
Federal Home Loan Bank Term Advances, Fair Value Disclosure	0	0	0
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	0	0	0
Accrued Interest Payable, Fair Value Disclosure	$0	$0	$0