Fair Value of Financial Instruments (Tables)

6 Months Ended

Jun. 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:
June 30, 2014
Securities Available-for Sale:
U.S. Agency Obligations	$	92,186	$	—	$	92,186	$	—
State and Municipal Obligations	102,862		—		102,862		—
Mortgage-Backed Securities - Residential	153,770		—		153,770		—
Corporate and Other Debt Securities	16,829		—		16,829		—
Mutual Funds and Equity Securities	1,201		—		1,201		—
Total Securities Available-for-Sale	$	366,848	$	—	$	366,848	$	—
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	$	—
June 30, 2013
Securities Available-for Sale:
U.S. Agency Obligations	$	150,046	$	—	$	150,046	$	—
State and Municipal Obligations	130,444		—		130,444		—
Mortgage-Backed Securities - Residential	203,230		—		203,230		—
Corporate and Other Debt Securities	16,711		—		16,711		—
Mutual Funds and Equity Securities	1,143		—		1,143		—
Total Securities Available-for Sale	$	501,574	$	—	$	501,574	$	—
Fair Value of Assets and Liabilities Measured on a Nonrecurring Basis:
June 30, 2014
Other Real Estate Owned and Repossessed Assets, Net	$	326	$	—	$	—	$	326	$	(139	)
December 31, 2013
Other Real Estate Owned and Repossessed Assets, Net	$	144	$	—	$	—	$	144	$	(79	)
June 30, 2013
Other Real Estate Owned and Repossessed Assets, Net	$	1,175	$	—	$	—	$	1,175	$	(64	)

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
June 30, 2014
Cash and Cash Equivalents	$	51,810	$	51,810	$	51,810	$	—	$	—
Securities Available-for-Sale	366,848		366,848		—		366,848		—
Securities Held-to-Maturity	297,437		304,259		—		304,259		—
Federal Home Loan Bank and Federal   Reserve Bank Stock	4,583		4,583		4,583		—		—
Net Loans	1,329,088		1,342,104		—		—		1,342,104
Accrued Interest Receivable	5,849		5,849		5,849		—		—
Deposits	1,860,666		1,856,131		1,630,950		225,181		—
Federal Funds Purchased and Securities   Sold Under Agreements to Repurchase	16,896		16,896		16,896		—		—
Federal Home Loan Bank Term Advances	34,000		34,427		24,000		10,427		—
Junior Subordinated Obligations Issued   to Unconsolidated Subsidiary Trusts	20,000		20,000		—		20,000		—
Accrued Interest Payable	365		365		365		—		—
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		—		—
June 30, 2013
Cash and Cash Equivalents	$	44,600	$	44,600	$	44,600	$	—	$	—
Securities Available-for-Sale	501,574		501,574		—		501,574		—
Securities Held-to-Maturity	248,914		252,691		—		252,691		—
Federal Home Loan Bank and Federal   Reserve Bank Stock	6,136		6,136		6,136		—		—
Net Loans	1,190,056		1,198,430		—		—		1,198,430
Accrued Interest Receivable	5,708		5,708		5,708		—		—
Deposits	1,779,905		1,776,590		1,510,867		265,723		—
Federal Funds Purchased and Securities   Sold Under Agreements to Repurchase	14,738		14,738		14,738		—		—
Federal Home Loan Bank Term Advances	70,000		70,267		40,000		30,267		—
Junior Subordinated Obligations Issued   to Unconsolidated Subsidiary Trusts	20,000		20,000		—		20,000		—
Accrued Interest Payable	493		493		493		—		—