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Fair Value Measurements
3 Months Ended
Mar. 31, 2015
Fair Value Disclosures [Abstract]  
Fair Value Measurements
Fair Value Measurements
Assets Measured at Fair Value on a Recurring Basis
The following tables present information about the Company's financial assets and liabilities measured at fair value on a recurring basis, aggregated by the level in the fair value hierarchy within which those measurements fall (amounts in thousands):
 
 
 
Fair Value Measurement at Reporting Date Using
 
Balance as of March 31, 2015
 
Quoted Prices
in Active
Markets for
Identical
Assets
(Level 1)
 
Significant
Other
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
Assets
 
 
 
 
 
 
 
Available-for-sale securities (a)
$
135

 
$
135

 
$

 
$

Liabilities
 
 
 
 
 
 
 
Interest rate swaps
$
11,509

 
$

 
$
11,509

 
$

 
 
 
Fair Value Measurement at Reporting Date Using
 
Balance as of December 31, 2014
 
Quoted Prices
in Active
Markets for
Identical
Assets
(Level 1)
 
Significant
Other
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
Assets
 
 
 
 
 
 
 
Available-for-sale securities (a)
$
187

 
$
187

 
$

 
$

Liabilities
 
 
 
 
 
 
 
Interest rate swaps
$
10,254

 
$

 
$
10,254

 
$

____________________________________
(a) Available-for-sale securities are included in Other assets, net in the accompanying Condensed Consolidated Balance Sheets.

The fair values of the Company's interest rate swaps are determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each swap. This analysis reflects the contractual terms of the interest rate swap, including the period to maturity, and uses observable market-based inputs, including forward interest rate curves. The Company incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty's nonperformance risk in the fair value measurements.
    
Fair Value of Long-term Debt

The following table presents information about the estimated fair value of the Company's long-term debt compared with its carrying amount (amounts in millions):
 
 
March 31,
2015
 
December 31, 2014
Aggregate fair value
 
$
2,175

 
$
2,166

Aggregate carrying amount, net of unamortized discounts
 
2,104

 
2,147



The estimated fair value of the Company's long-term debt is based on quoted market prices from various banks for similar instruments, which is considered a Level 2 input under the fair value measurement hierarchy.