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Fair Value of Financial Instruments
3 Months Ended
Mar. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Fair Value of Financial Instruments
Fair Value of Financial Instruments
The fair value of cash and cash equivalents, restricted cash, accounts receivable, accounts payable and accrued expenses approximate their carrying value because of the short-term nature of these instruments.
The carrying value and fair value of other financial instruments are as follows:
 
March 31, 2014
 
December 31, 2013
(dollars in millions)
Carrying Value
 
Fair Value
 
Carrying Value
 
Fair Value
6 3/8% Senior Notes due 2022
$
525.0

 
$
555.2

 
$
525.0

 
$
539.4

Other financing arrangements
56.4

 
64.1

 
56.3

 
63.8


The fair value of our 6 3/8% Senior Notes on March 31, 2014, and December 31, 2013, which are considered Level 1 of the fair value hierarchy, are based on the average trading price for these notes on or about the respective dates. The fair value of other financing arrangements at March 31, 2014 and December 31, 2013, was calculated using a discounted cash flow model that incorporates current borrowing rates for obligations of similar duration. These fair value measurements are considered Level 2 of the fair value hierarchy.