Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2014

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 In Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Gains (Losses)
Fair Value of Assets and Liabilities Measured on a Recurring Basis:
September 30, 2014
Securities Available-for Sale:
U.S. Agency Obligations	$	134,051	$	—	$	134,051	$	—
State and Municipal Obligations	92,150		—		92,150		—
Mortgage-Backed Securities - Residential	130,101		—		130,101		—
Corporate and Other Debt Securities	16,756		—		16,756		—
Mutual Funds and Equity Securities	1,277		—		1,277		—
Total Securities Available-for-Sale	$	374,335	$	—	$	374,335	$	—
December 31, 2013
Securities Available-for Sale:
U.S. Agency Obligations	$	136,475	$	—	$	136,475	$	—
State and Municipal Obligations	127,389		—		127,389		—
Mortgage-Backed Securities - Residential	175,778		—		175,778		—
Corporate and Other Debt Securities	16,798		—		16,798		—
Mutual Funds and Equity Securities	1,166		—		1,166		—
Total Securities Available-for Sale	$	457,606	$	—	$	457,606	$	—
September 30, 2013
Securities Available-for Sale:
U.S. Agency Obligations	$	149,774	$	—	$	149,774	$	—
State and Municipal Obligations	133,919		—		133,919		—
Mortgage-Backed Securities - Residential	185,215		—		185,215		—
Corporate and Other Debt Securities	16,798		—		16,798		—
Mutual Funds and Equity Securities	1,182		—		1,182		—
Total Securities Available-for Sale	$	486,888	$	—	$	486,888	$	—
Fair Value of Assets and Liabilities Measured on a Nonrecurring Basis:
September 30, 2014
Other Real Estate Owned and Repossessed Assets, Net	$	392	$	—	$	—	$	392	$	(139	)
Impaired Loans	533		—		—		533		(82		)
December 31, 2013
Other Real Estate Owned and Repossessed Assets, Net	$	144	$	—	$	—	$	144	$	(79	)
September 30, 2013
Other Real Estate Owned and Repossessed Assets, Net	$	499	$	—	$	—	$	499	$	(180	)

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 Amount		Fair Value		Level 1		Level 2		Level 3
September 30, 2014
Cash and Cash Equivalents	$	64,664	$	64,664	$	64,664	$	—	$	—
Securities Available-for-Sale	374,335		374,335		—		374,335		—
Securities Held-to-Maturity	296,522		302,567		—		302,567		—
Federal Home Loan Bank and Federal   Reserve Bank Stock	3,001		3,001		3,001		—		—
Net Loans	1,366,147		1,371,368		—		—		1,371,368
Accrued Interest Receivable	6,629		6,629		6,629		—		—
Deposits	1,935,356		1,929,377		1,709,155		220,222		—
Federal Funds Purchased and Securities   Sold Under Agreements to Repurchase	19,654		19,654		19,654		—		—
Federal Home Loan Bank Term Advances	10,000		10,340		10,340		—		—
Junior Subordinated Obligations Issued   to Unconsolidated Subsidiary Trusts	20,000		20,000		—		20,000		—
Accrued Interest Payable	357		357		357		—		—
December 31, 2013
Cash and Cash Equivalents	$	49,980	$	49,980	$	49,980	$	—	$	—
Securities Available-for-Sale	457,606		457,606		—		457,606		—
Securities Held-to-Maturity	299,261		302,305		—		302,305		—
Federal Home Loan Bank and Federal   Reserve Bank Stock	6,281		6,281		6,281		—		—
Net Loans	1,252,038		1,266,020		—		—		1,266,020
Accrued Interest Receivable	5,745		5,745		5,745		—		—
Deposits	1,842,330		1,839,613		1,595,103		244,510		—
Federal Funds Purchased and Securities   Sold Under Agreements to Repurchase	11,777		11,777		11,777		—		—
Federal Home Loan Bank Term Advances	73,000		74,629		53,000		21,629		—
Junior Subordinated Obligations Issued   to Unconsolidated Subsidiary Trusts	20,000		20,000		—		20,000		—
Accrued Interest Payable	439		439		439		—		—
September 30, 2013
Cash and Cash Equivalents	$	72,052	$	72,052	$	72,052	$	—	$	—
Securities Available-for-Sale	486,888		486,888		—		486,888		—
Securities Held-to-Maturity	273,626		278,390		—		278,390		—
Federal Home Loan Bank and Federal   Reserve Bank Stock	3,896		3,896		3,896		—		—
Net Loans	1,228,786		1,246,005		—		—		1,246,005
Accrued Interest Receivable	6,614		6,614		6,614		—		—
Deposits	1,895,375		1,891,086		1,635,549		255,537		—
Federal Funds Purchased and Securities   Sold Under Agreements to Repurchase	15,977		15,977		15,977		—		—
Federal Home Loan Bank Term Advances	20,000		20,823		—		20,823		—
Junior Subordinated Obligations Issued   to Unconsolidated Subsidiary Trusts	20,000		20,000		—		20,000		—
Accrued Interest Payable	472		472		472		—		—