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Fair Value of Financial Instruments
3 Months Ended
Mar. 31, 2019
Fair Value Disclosures [Abstract]  
Fair Value of Financial Instruments
Fair Value of Financial Instruments

The fair value of certain financial assets and liabilities and other financial instruments as of March 31, 2019 and December 31, 2018, in thousands, is as follows:
 
March 31, 2019
 
December 31, 2018
 
Carrying
Amount (1)
 
Fair Value
 
Carrying
Amount (1)
 
Fair Value
Debt
$
1,034,907

 
$
1,027,913

 
$
977,966

 
$
960,447

Interest rate swap agreements
$
572

 
$
572

 
$

 
$


_______________

(1)
The carrying amount of debt is net of unamortized debt issuance costs.

The fair value of our debt is a Level 2 measurement under the fair value hierarchy (see Note 2). We estimate the fair value of our debt by discounting the future cash flows of each instrument at estimated market rates. The fair value of our interest rate swaps is a Level 2 measurement under the fair value hierarchy. We estimate the fair value of the interest rate swap based on the interest rate yield curve and implied market volatility as inputs and adjusted for the counterparty's credit risk. We concluded the inputs for the credit risk valuation adjustment are Level 3 inputs, however these inputs are not significant to the fair value measurement in its entirety. The carrying value of our other financial instruments approximate fair value due to the short-term nature of these financial instruments.