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Fair Value Disclosures
9 Months Ended
Aug. 31, 2018
Fair Value Disclosures [Abstract]  
Fair Value Disclosures
Fair Value Disclosures
Fair value measurements of assets and liabilities are categorized based on the following hierarchy:
Level 1
 
Fair value determined based on quoted prices in active markets for identical assets or liabilities.
Level 2
 
Fair value determined using significant observable inputs, such as quoted prices for similar assets or liabilities or quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability, or inputs that are derived principally from or corroborated by observable market data, by correlation or other means.
Level 3
 
Fair value determined using significant unobservable inputs, such as pricing models, discounted cash flows, or similar techniques.

Fair value measurements are used for inventories on a nonrecurring basis when events and circumstances indicate that their carrying value is not recoverable. The following table presents the fair value hierarchy, pre-impairment value, inventory impairment charges and fair value for our assets measured at fair value on a nonrecurring basis for the nine months ended August 31, 2018 and the year ended November 30, 2017 (in thousands): 
 
 
 
 
August 31, 2018
 
November 30, 2017
Description
 
Fair Value Hierarchy
 
Pre-Impairment Value
 
Inventory Impairment Charges
 
Fair Value (a)
 
Pre-Impairment Value
 
Inventory Impairment Charges
 
Fair Value (a)
Inventories
 
Level 3
 
$
49,571

 
$
(17,827
)
 
$
31,744

 
$
58,962

 
$
(20,605
)
 
$
38,357

(a)
Amounts represent the aggregate fair value for real estate assets impacted by inventory impairment charges during the applicable period as of the date the fair value measurements were made. The carrying value for these real estate assets may have subsequently increased or decreased from the fair value reflected due to activity that has occurred since the measurement date.
The fair values for inventories that were determined using Level 3 inputs were based on the estimated future net cash flows discounted for inherent risk associated with each underlying asset.
The following table presents the fair value hierarchy, carrying values and fair values of our financial instruments, except those for which the carrying values approximate fair values (in thousands):
 
 
 
August 31, 2018
 
November 30, 2017
 
Fair Value
Hierarchy
 
Carrying
Value (a)
 

Fair Value
 
Carrying
Value (a)
 

Fair Value
Financial Liabilities:
 
 
 
 
 
 
 
 
 
Senior notes
Level 2
 
$
1,789,350

 
$
1,884,875

 
$
2,086,070

 
$
2,292,250

Convertible senior notes
Level 2
 
229,482

 
238,913

 
228,572

 
278,300


(a)
The carrying values for the senior notes and convertible senior notes, as presented, include unamortized debt issuance costs. Debt issuance costs are not factored into the estimated fair values of these notes.
The fair values of our senior notes and convertible senior notes are generally estimated based on quoted market prices for these instruments. The carrying values reported for cash and cash equivalents, and mortgages and land contracts due to land sellers and other loans approximate fair values. The carrying value of corporate-owned life insurance is based on the cash surrender value of the policies and, accordingly, approximates fair value.