Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2018

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		Quoted Prices In Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Life-to-Date Gains (Losses)
Fair Value of Assets and Liabilities Measured on a Recurring Basis:
September 30, 2018
Securities Available-for Sale:
U.S. Government & Agency Obligations	$	59,602	$	—	$	59,602	$	—
State and Municipal Obligations	2,548		—		2,548		—
Mortgage-Backed Securities	277,461		—		277,461		—
Corporate and Other Debt Securities	800		—		800		—
Total Securities Available-for-Sale	340,411		—		340,411		—
Equity Securities	1,916		—		1,916		—
Total Securities Measured on a Recurring Basis	$	342,327	$	—	$	342,327	$	—
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		—
Equity Securities	1,561		—		1,561		—
Total Securities Available-for Sale	$	300,200	$	—	$	300,200	$	—
September 30, 2017
Securities Available-for Sale:
U.S. Government & Agency Obligations	$	146,978	$	64,730	$	82,248	$	—
State and Municipal Obligations	11,902		—		11,902		—
Mortgage-Backed Securities	152,806		—		152,806		—
Corporate and Other Debt Securities	2,299		—		2,299		—
Equity Securities	1,474		—		1,474		—
Total Securities Available-for Sale	$	315,459	$	64,730	$	250,729	$	—
Fair Value of Assets and Liabilities Measured on a Nonrecurring Basis:
September 30, 2018
Collateral Dependent Impaired Loans	$	857	$	—	$	—	$	857	$	(58	)
Other Real Estate Owned and Repossessed Assets, Net	1,220		—		—		1,220		(559		)
December 31, 2017
Collateral Dependent Impaired Loans	$	—	$	—	$	—	$	—	$	—
Other Real Estate Owned and Repossessed Assets, Net	$	1,847	$	—	—		1,847		$	(569	)
September 30, 2017
Collateral Dependent Impaired Loans	$	1,502	$	—	$	—	$	1,502	$	(138	)
Other Real Estate Owned and Repossessed Assets, Net	1,713		—		—		1,713		(655		)

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
	Book Value		Fair Value		Level 1		Level 2		Level 3
September 30, 2018
Cash and Cash Equivalents	$	92,295	$	92,295	$	92,295	$	—	$	—
Securities Available-for-Sale	340,411		340,411		—		340,411		—
Securities Held-to-Maturity	289,952		282,719		—		282,719		—
Equity Securities	1,916		1,916		—		1,916		—
Federal Home Loan Bank and Federal   Reserve Bank Stock	10,866		10,866		—		10,866		—
Net Loans	2,106,097		2,030,278		—		—		2,030,278
Accrued Interest Receivable	8,028		8,028		—		8,028		—
Deposits	2,407,855		2,398,987		—		2,398,987		—
Federal Funds Purchased and Securities   Sold Under Agreements to Repurchase	62,503		62,503		—		62,503		—
Federal Home Loan Bank Overnight Advances	131,000		131,000		—		131,000		—
Federal Home Loan Bank Term Advances	45,000		44,488		—		44,488		—
Junior Subordinated Obligations Issued   to Unconsolidated Subsidiary Trusts	20,000		20,000		—		20,000		—
Accrued Interest Payable	485		485		—		485		—
December 31, 2017
Cash and Cash Equivalents	$	72,838	$	72,838	$	72,838	$	—	$	—
Securities Available-for-Sale	300,200		300,200		—		300,200		—
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		—
September 30, 2017
Cash and Cash Equivalents	$	80,666	$	80,666	$	80,666	$	—	$	—
Securities Available-for-Sale	315,459		315,459		64,730		250,729		—
Securities Held-to-Maturity	341,526		343,899		—		343,899		—
Federal Home Loan Bank and Federal   Reserve Bank Stock	6,704		6,704		—		6,704		—
Net Loans	1,891,104		1,870,379		—		—		1,870,379
Accrued Interest Receivable	6,563		7,692		—		7,692		—
Deposits	2,307,116		2,299,011		—		2,299,011		—
Federal Funds Purchased and Securities   Sold Under Agreements to Repurchase	61,419		61,419		—		61,419		—
Federal Home Loan Bank Overnight Advances	33,000		33,000		—		33,000		—
Federal Home Loan Bank Term Advances	55,000		55,110		—		55,110		—
Junior Subordinated Obligations Issued   to Unconsolidated Subsidiary Trusts	20,000		20,000		—		20,000		—
Accrued Interest Payable	260		260		—		260		—