Fair value is the exchange price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. There are three levels of inputs that may be used to measure fair values:

The Company used the following methods and significant assumptions to estimate the fair value:

Investment Securities: The fair values for investment securities are determined by quoted market prices (Level 1). For securities where quoted prices are not available, fair values are calculated based on market prices of similar securities (Level 2). For securities where quoted prices or market prices of similar securities are not available, fair values are calculated using discounted cash flows or other market indicators (Level 3).

Loans Held for Sale, at Fair Value: The fair value of loans held for sale is determined using quoted prices for similar assets, adjusted for specific attributes of that loan or other observable market data, such as outstanding commitments from third party investors (Level 2).

Derivatives: The fair values of derivatives are based on valuation models using observable market data as of the measurement date (Level 2). Our derivatives are traded in an over-the-counter market where quoted market prices are not always available. Therefore, the fair values of derivatives are determined using quantitative models that utilize multiple market inputs. The inputs will vary based on the type of derivative, but could include interest rates, prices and indices to generate continuous yield or pricing curves, prepayment rates, and volatility factors to value the position. The majority of market inputs are actively quoted and can be validated through external sources, including brokers, market transactions and third-party pricing services.

Impaired Loans: The fair value of impaired loans with specific allocations of the allowance for loan and lease losses is generally based on recent real estate appraisals. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. Adjustments are routinely made in the appraisal process by the independent appraisers to adjust for differences between the comparable sales and income data available. Such adjustments are usually significant and typically result in a Level 3 classification of the inputs for determining fair value.

Other Real Estate Owned: Nonrecurring adjustments to certain commercial and residential real estate properties classified as other real estate owned (OREO) are measured at fair value, less estimated costs to sell. Fair values are based on recent real estate appraisals. These appraisals may use a single valuation approach or a combination of approaches including comparable sales and the income approach. Adjustments are routinely made in the appraisal process by the independent appraisers to adjust for differences between the comparable sales and income data available. Such adjustments are usually significant and typically result in a Level 3 classification of the inputs for determining fair value.

Appraisals for both collateral-dependent impaired loans and other real estate owned are performed by certified general appraisers (for commercial properties) or certified residential appraisers (for residential properties) whose qualifications and licenses have been reviewed and verified by Management. Once received, a third party conducts a review of the appraisal for compliance with the Uniform Standards of Professional Appraisal Practice and appropriate analysis methods for the type of property. Subsequently, a member of the Credit Department reviews the assumptions and approaches utilized in the appraisal, as well as the overall resulting fair value in comparison with independent data sources such as recent market data or industry-wide statistics. Appraisals on collateral dependent impaired loans and other real estate owned (consistent for all loan types) are obtained on an annual basis, unless a significant change in the market or other factors warrants a more frequent appraisal. On an annual basis, Management compares the actual selling price of any collateral that has been sold to the most recent appraised value to determine what additional adjustment should be made to the appraisal value to arrive at fair value for other properties. The most recent analysis performed indicated that a discount up to 15 percent should be applied to appraisals on properties. The discount is determined based on the nature of the underlying properties, aging of appraisals and other factors. For each collateral-dependent impaired loan, we consider other factors, such as certain indices or other market information, as well as property specific circumstances to determine if an adjustment to the appraised value is needed. In situations where there is evidence of change in value, the Bank will determine if there is a need for an adjustment to the specific reserve on the collateral dependent impaired loans. When the Bank applies an interim adjustment, it generally shows the adjustment as an incremental specific reserve against the loan until it has received the full updated appraisal. All collateral-dependent impaired loans and other real estate owned valuations were supported by an appraisal less than 12 months old or in the process of obtaining an appraisal as of June 30, 2019.

The following table summarizes, for the periods indicated, assets measured at fair value on a recurring basis, including financial assets for which the Corporation has elected the fair value option:

				Fair Value Measurements Using
				Quoted
				Prices in
				Active		Significant
				Markets For		Other			Significant
				Identical		Observable			Unobservable
	June 30,			Assets		Inputs			Inputs
(In thousands)	2019			(Level 1)		(Level 2)			(Level 3)
Assets:
Available for sale:
U.S. government-sponsored agencies	$	71,791		$	—	$	71,791		$	—
Mortgage-backed securities-residential		283,937			—		283,937			—
SBA pool securities		3,587			—		3,587			—
State and political subdivisions		16,443			—		16,443			—
Corporate bond		3,081			—		3,081			—
CRA investment fund		4,847			4,847		—			—
Loans held for sale, at fair value		2,343			—		2,343			—
Derivatives:
Cash flow hedges		175			—		175			—
Loan level swaps		30,569			—		30,569			—
Total	$	416,773		$	4,847	$	411,926		$	—

Liabilities:
Derivatives:
Cash flow hedges	$	(4,074	)	$	—	$	(4,074	)	$	—
Loan level swaps		(30,569	)		—		(30,569	)		—
Total	$	(34,643	)	$	—	$	(34,643	)	$	—

				Fair Value Measurements Using
				Quoted
				Prices in
				Active		Significant
				Markets For		Other			Significant
				Identical		Observable			Unobservable
	December 31,			Assets		Inputs			Inputs
(In thousands)	2018			(Level 1)		(Level 2)			(Level 3)
Assets:
Securities available for sale:
U.S. government-sponsored agencies	$	102,013		$	—	$	102,013		$	—
Mortgage-backed securities-residential		251,362			—		251,362			—
SBA pool securities		3,839			—		3,839			—
State and political subdivisions		17,610			—		17,610			—
Corporate bond		3,112			—		3,112			—
CRA investment fund		4,719			4,719		—			—
Loans held for sale, at fair value		1,576			—		1,576			—
Derivatives:
Cash flow hedges		1,657			—		1,657			—
Loan level swaps		9,689			—		9,689			—
Total	$	395,577		$	4,719	$	390,858		$	—

Liabilities:
Derivatives:
Cash flow hedges	$	(849	)	$	—	$	(849	)	$	—
Loan level swaps		(9,689	)		—		(9,689	)		—
Total	$	(10,538	)	$	—	$	(10,538	)	$	—

The Company has elected the fair value option for certain loans held for sale. These loans are intended for sale and the Company believes that the fair value is the best indicator of the resolution of these loans. Interest income is recorded based on the contractual terms of the loan and in accordance with the Company’s policy on loans held for investment. None of these loans are 90 days or more past due nor on nonaccrual as of June 30, 2019 and December 31, 2018.

The following tables present residential loans held for sale, at fair value for the periods indicated:

There were no transfers between Level 1 and Level 2 during the three and six months ended June 30, 2019.

There were no loans measured for impairment using the fair value of collateral as of June 30, 2019 and December 31, 2018.

The carrying amounts and estimated fair values of financial instruments at June 30, 2019 are as follows:

			Fair Value Measurements at June 30, 2019 using
	Carrying
(In thousands)	Amount		Level 1		Level 2		Level 3		Total
Financial assets
Cash and cash equivalents	$	304,027	$	304,027	$	—	$	—	$	304,027
Securities available for sale		378,839		—		378,839		—		378,839
CRA investment fund		4,847		4,847		—		—		4,847
FHLB and FRB stock		18,338		—		—		—	N/A
Loans held for sale, at fair value		2,343		—		2,343		—		2,343
Loans held for sale, at lower of cost or fair value		926		—		1,000		—		1,000
Loans, net of allowance for loan and lease losses		3,989,548		—		—		3,946,808		3,946,808
Accrued interest receivable		11,594		—		1,708		9,886		11,594
Cash flow hedges		175		—		175		—		175
Loan level swaps		30,569		—		30,569		—		30,569
Financial liabilities
Deposits	$	4,095,655	$	3,433,048	$	665,573	$	—	$	4,098,621
Federal home loan bank advances		105,000		—		108,401		—		108,401
Subordinated debt		83,305		—		—		84,400		84,400
Accrued interest payable		2,494		430		2,009		55		2,494
Cash flow hedges		4,074		—		4,074		—		4,074
Loan level swap		30,569		—		30,569		—		30,569

The carrying amounts and estimated fair values of financial instruments at December 31, 2018 are as follows:

			Fair Value Measurements at December 31, 2018 using
	Carrying
(In thousands)	Amount		Level 1		Level 2		Level 3		Total
Financial assets
Cash and cash equivalents	$	160,773	$	160,773	$	—	$	—	$	160,773
Securities available for sale		377,936		—		377,936		—		377,936
CRA investment fund		4,719		4,719		—		—		4,719
FHLB and FRB stock		18,533		—		—		—	N/A
Loans held for sale, at fair value		1,576		—		1,576		—		1,576
Loans held for sale, at lower of cost or fair value		3,542		—		3,654		—		3,654
Loans, net of allowance for loan and lease losses		3,889,427		—		—		3,852,004		3,852,004
Accrued interest receivable		10,814		—		1,875		8,939		10,814
Cash flow Hedges		1,657		—		1,657		—		1,657
Loan level swaps		9,689		—		9,689		—		9,689
Financial liabilities
Deposits	$	3,895,340	$	3,249,274	$	640,997	$	—	$	3,890,271
Federal home loan bank advances		108,000		—		108,950		—		108,950
Subordinated debt		83,193		—		—		82,207		82,207
Accrued interest payable		2,868		331		2,482		55		2,868
Cash flow hedges		849		—		849		—		849
Loan level swaps		9,689		—		9,689		—		9,689