Fair Values (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Fair Value Measurements, Recurring and Nonrecurring

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 of Assets and Liabilities Measured on a Recurring Basis:	Fair Value		Quoted Prices In Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Gains (Losses)
December 31, 2017
Securities Available-for Sale:
U.S. Government & Agency Obligations	$	59,894	$	59,894	$	—	$	—
State and Municipal Obligations	10,349		—		10,349		—
Mortgage-Backed Securities	227,596		—		227,596		—
Corporate and Other Debt Securities	800		—		800		—
Mutual Funds and Equity Securities	1,561		—		1,561		—
Total Securities Available-for-Sale	$	300,200	$	59,894	$	240,306	$	—
December 31, 2016
Securities Available-for Sale:
U.S. Government & Agency Obligations	$	147,377	$	54,706	$	92,671	$	—
State and Municipal Obligations	27,690		—		27,690		—
Mortgage-Backed Securities	167,239		—		167,239		—
Corporate and Other Debt Securities	3,308		—		3,308		—
Mutual Funds and Equity Securities	1,382		—		1,382		—
Total Securities Available-for Sale	$	346,996	$	54,706	$	292,290	$	—
Fair Value of Assets and Liabilities Measured on a Nonrecurring Basis:
December 31, 2017
Collateral Dependent Impaired Loans	$	—	$	—	$	—	$	—	$	—
Other Real Estate Owned and Repossessed Assets, Net	$	1,847	$	—	$	—	$	1,847	$	(569	)
December 31, 2016
Collateral Dependent Impaired Loans	$	—	$	—	$	—	$	—	$	—
Other Real Estate Owned and Repossessed Assets, Net	$	1,686	$	—	$	—	$	1,686	$	(587	)

Fair Value, by Balance Sheet Grouping

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 Amount		Fair Value		Level 1		Level 2		Level 3
December 31, 2017
Cash and Cash Equivalents	$	72,838	$	72,838	$	72,838	$	—	$	—
Securities Available-for-Sale	300,200		300,200		59,894		240,306		—
Securities Held-to-Maturity	335,907		335,901		—		335,901		—
Federal Home Loan Bank and Federal Reserve Bank Stock	9,949		9,949		—		9,949		—
Net Loans	1,932,184		1,901,046		—		—		1,901,046
Accrued Interest Receivable	6,753		6,753		—		6,753		—
Deposits	2,245,116		2,236,548		—		2,236,548		—
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	64,966		64,966		—		64,966		—
Federal Home Loan Bank Overnight Advances	105,000		105,000		—		105,000		—
Federal Home Loan Bank Term Advances	55,000		54,781		—		54,781		—
Junior Subordinated Obligations Issued   to Unconsolidated Subsidiary Trusts	20,000		20,000		—		20,000		—
Accrued Interest Payable	410		410		—		410		—
December 31, 2016
Cash and Cash Equivalents	$	57,355	$	57,355	$	57,355	$	—	$	—
Securities Available-for-Sale	346,996		346,996		54,706		292,290		—
Securities Held-to-Maturity	345,427		343,751		—		343,751		—
Federal Home Loan Bank and Federal Reserve Bank Stock	10,912		10,912		—		10,912		—
Net Loans	1,736,256		1,720,078		—		—		1,720,078
Accrued Interest Receivable	6,684		6,684		—		6,684		—
Deposits	2,116,546		2,109,557		—		2,109,557		—
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	35,836		35,836		—		35,836		—
Federal Home Loan Bank Overnight Advances	123,000		123,000		—		123,000		—
Federal Home Loan Bank Term Advances	55,000		55,118		—		55,118		—
Junior Subordinated Obligations Issued   to Unconsolidated Subsidiary Trusts	20,000		20,000		—		20,000		—
Accrued Interest Payable	247		247		—		247		—