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Fair Value Disclosures
 6 Months Ended
Jun. 30, 2013
Fair Value Disclosures [Abstract]  
Fair Value Disclosures
12. Fair Value Disclosures

Recurring Fair Value Disclosures. The following table presents information about our financial instruments measured at fair value on a recurring basis as of June 30, 2013 and December 31, 2012 under the fair value hierarchy discussed in Note 2, "Summary of Significant Accounting Policies and Recent Accounting Pronouncements."
 
Financial Instruments Measured at Fair Value on a Recurring Basis
 
June 30, 2013
 
December 31, 2012
(in millions)
Level 1
 
Level 2
 
Level 3
 
Total
 
Level 1
 
Level 2
 
Level 3
 
Total
Assets
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Deferred compensation plan investments (1)
$
38.1

 
$
—

 
$
—

 
$
38.1

 
$
35.0

 
$
—

 
$
—

 
$
35.0

(1)
Approximately $0.8 million of participant cash was withdrawn from our deferred compensation plan investments during the six months ended June 30, 2013.

Financial Instrument Fair Value Disclosures. As of June 30, 2013 and December 31, 2012, the carrying values of cash and cash equivalents, accounts receivable, accounts payable, accrued expenses and distributions payable represent fair value because of the short-term nature of these instruments. The carrying value of restricted cash approximates its fair value based on the nature of our assessment of the ability to recover these amounts.
The following table presents the carrying and estimated fair values of our notes payable at June 30, 2013 and December 31, 2012:
 
June 30, 2013
 
December 31, 2012
(in millions)
Carrying
Value
 
Estimated
Fair  Value
 
Carrying
Value
 
Estimated
Fair  Value
Fixed rate notes payable
$
2,270.8

 
$
2,361.6

 
$
2,297.8

 
$
2,518.1

Floating rate notes payable
253.0

 
243.0

 
212.7

 
203.4

Non-recurring Fair Value Disclosures. There were no events during the six months ended June 30, 2013 or 2012 which required fair value adjustments of our non-financial assets and non-financial liabilities.