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Note 8 - Fair Value Measurements
9 Months Ended
Sep. 30, 2016
Notes to Financial Statements  
Fair Value Disclosures [Text Block]
Note
8
Fair Value Measurements
 
The accounting standard for fair value measurements provides a framework for measuring fair value and requires expanded disclosures regarding fair value measurements. Fair value is defined as the price that would be received for an asset or the exit price that would be paid to transfer a liability in the principal or most advantageous market in an orderly transaction between market participants on the measurement date. This accounting standard establishes a fair value hierarchy, which requires an entity to maximize the use of observable inputs, where available. The following summarizes the three levels of inputs that may be used to measure fair value:
 
Level 1
– The valuation is based on quoted prices in active markets for identical instruments.
Level 2
– The valuation is based on observable inputs such as quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model–based valuation techniques for which all significant assumptions are observable in the market.
Level 3
– The valuation is based on unobservable inputs that are supported by minimal or no market activity and that are significant to the fair value of the instrument. Level 3 valuations are typically performed using pricing models, discounted cash flow methodologies, or similar techniques that incorporate management’s own estimates of assumptions that market participants would use in pricing the instrument, or valuations that require significant management judgment or estimation.
 
A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement.
 
Valuation of Marketable Securities
 
The Company determines fair value for marketable securities with Level 1 inputs through quoted market prices. The Company determines fair value for marketable securities with Level 2 inputs through broker or dealer quotations or alternative pricing sources with reasonable levels of price transparency. Our Level 2 marketable securities have been initially valued at the transaction price and subsequently valued, at the end of each month, typically utilizing third party pricing services or other market observable data. The pricing services utilize industry standard valuation models, including both income and market based approaches and observable market inputs to determine value. These observable market inputs include reportable trades, benchmark yields, credit spreads, broker/dealer quotes, bids, offers, and other industry and economic events.
 
We validated the prices provided by our broker by reviewing their pricing methods, obtaining market values from other pricing sources, analyzing pricing data in certain instances and confirming that the relevant markets are active. After completing our validation procedures, we did not adjust or override any fair value measurements provided by our broker as of September 30, 2016. We did not have any transfers of assets between Level 1 and Level 2 of the fair value measurement hierarchy during the nine months ended September 30, 2016.
 
Other
 
The carrying amounts of cash and cash equivalents, restricted cash and cash equivalents, accounts receivable, and accounts payable approximate fair value due to their short–term nature. The estimated fair value of notes receivable approximates the carrying value based principally on their underlying interest rates and terms, maturities, collateral and credit status of the receivables. Our long–term debt approximates fair value due to variable interest rates, but fair value is also determined using Level 2 inputs through alternative pricing sources. At September 30, 2016, there were no material differences between the carrying amounts and fair values of NHC’s financial instruments.
 
The following table summarizes fair value measurements by level at September 30, 2016 and December 31, 2015 for assets and liabilities measured at fair value on a recurring basis
(in thousands)
:
 
   
Fair Value Measurements Using
 
September 30, 2016
 
Fair
Value
   
Quoted Prices in
Active Markets
For Identical
Assets
(Level 1)
   
Significant
Other
Observable
Inputs
(Level 2)
   
Significant
Unobservable
Inputs
(Level 3)
 
Cash and cash equivalents
  $ 19,212     $ 19,212     $     $  
Restricted cash and cash equivalents
    17,158       17,158              
Marketable equity securities
    147,017       147,017              
Corporate debt securities
    67,826       34,538       33,288        
Mortgage–backed securities
    53,913             53,913        
U.S. Treasury securities
    27,188       27,188              
State and municipal securities
    29,959             29,959        
Total financial assets
  $ 362,273     $ 245,113     $ 117,160     $  
 
 
   
Fair Value Measurements Using
 
December 31, 2015
 
Fair
Value
   
Quoted Prices in
Active Markets
For Identical
Assets
(Level 1)
   
Significant
Other
Observable
Inputs
(Level 2)
   
Significant
Unobservable
Inputs
(Level 3)
 
Cash and cash equivalents
  $ 38,208     $ 38,208     $     $  
Restricted cash and cash equivalents
    11,106       11,106              
Marketable equity securities
    116,168       116,168              
Corporate debt securities
    71,143       32,683       38,460        
Mortgage-backed securities
    60,910             60,910        
U.S. Treasury securities
    21,033       21,033              
State and municipal securities
    16,780             16,780        
Total financial assets
  $ 335,348     $ 219,198     $ 116,150     $