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Note 12 - Fair Value Measurement
12 Months Ended
Dec. 31, 2016
Notes to Financial Statements  
Fair Value Disclosures [Text Block]
Note
12:
Fair Value Measurement
 
The table below sets forth our assets and liabilities (in thousands) that were accounted for at fair value on a recurring basis and the fair value calculation input hierarchy level that we have determined applies to each asset and liability category.  See
Note
8
for information on the fair values of our defined benefit pension plan assets.
 
 
 
Balance at
December 31,
2016
 
 
Balance at
December 31,
2015
 
Input
Hierarchy
Level
Assets:
                 
                   
Cash and cash equivalents:
                 
Money market funds and other bank deposits
  $
169,777
    $
155,209
 
Level 1
                   
Available for sale securities:
                 
Debt securities – municipal and corporate bonds
   
29,117
     
 
Level 2
Equity securities – mining industry
   
5,002
     
1,515
 
Level 1
                   
Trade accounts receivable:
                 
Receivables from provisional concentrate sales
   
20,082
     
13,490
 
Level 2
                   
Derivative contracts:
                 
Metal forward contracts
   
5,403
     
 
Level 2
Foreign exchange contracts
   
27
     
 
Level 2
                   
Restricted cash balances:
                 
Certificates of deposit and other bank deposits
   
2,200
     
999
 
Level 1
                   
Total assets
  $
231,608
    $
171,213
 
 
                   
Liabilities
                 
                   
Derivative contracts:
                 
Metal forward contracts
  $
192
    $
 
Level 2
Foreign exchange contracts
   
5,288
     
 
Level 2
                   
Total liabilities
  $
5,480
    $
 
 
 
 
Cash and cash equivalents consist primarily of money market funds and are valued at cost, which approximates fair value, and a small portion consists of municipal bonds having maturities of less than
90
days, which are recorded at fair value.
 
Current available-for-sale securities consist of municipal and corporate bonds having maturities of more than
90
days, which are recorded at fair value.
 
Current and non-current restricted cash balances consist primarily of certificates of deposit, U.S. Treasury securities, and other deposits and are valued at cost, which approximates fair value.
 
Our non-current available for sale securities consist of marketable equity securities of companies in the mining industry which are valued using quoted market prices for each security.
 
Trade accounts receivable include amounts due to us for shipments of concentrates, doré and precipitate sold to customers.  Revenues and the corresponding accounts receivable for sales of metals products are recorded when title and risk of loss transfer to the customer (generally at the time of loading on truck or ship).  Sales of concentrates are recorded using estimated forward prices for the anticipated month of settlement applied to our estimate of payable metal quantities contained in each shipment.  Sales are recorded net of estimated treatment and refining charges, which are also impacted by changes in metals prices and quantities of contained metals.  We estimate the prices at which sales of our concentrates will be settled due to the time elapsed between shipment and final settlement with the customer.  Receivables for previously recorded concentrate sales are adjusted to reflect estimated forward metals prices at the end of each period until final settlement by the customer.  We obtain the forward metals prices used each period from a pricing service.  Changes in metal prices between shipment and final settlement result in changes to revenues previously recorded upon shipment.  The embedded derivative contained in our concentrate sales is adjusted to fair market value through earnings each period prior to final settlement.
 
We use financially-settled forward contracts to manage exposure to changes in the exchange rate between the U.S. dollar and Canadian dollar and Mexican peso, and the impact on Canadian dollar- and Mexican peso-denominated operating costs incurred at our Casa Berardi and San Sebastian units (see
Note
10
for more information). These contracts qualify for hedge accounting, with unrealized gains and losses related to the effective portion of the contracts included in accumulated other comprehensive loss, and unrealized gains and losses related to the ineffective portion of the contracts included in earnings each period. The fair value of each contract represents the present value of the difference between the forward exchange rate for the contract settlement period as of the measurement date and the contract settlement exchange rate.
 
We use financially-settled forward contracts to manage the exposure to changes in prices of silver, gold, zinc and lead contained in our concentrate shipments that have not reached final settlement.  We also use financially-settled forward contracts to manage the exposure to changes in prices of zinc and lead contained in our forecasted future concentrate shipments (see
Note
10
for more information).  These contracts do not qualify for hedge accounting, and are marked-to-market through earnings each period.  The fair value of each contract represents the present value of the difference between the forward metal price for the contract settlement period as of the measurement date and the contract settlement metal price.
 
Our Senior Notes, which were recorded at their carrying value of
$501.0
million, net of unamortized initial purchaser discount at
December
 
31,
2016,
had a fair value of
$521.4
million at
December
 
31,
2016.
Third-party quotes, which we consider to be Level
2
inputs, are utilized to estimate fair values of the Senior Notes. See
Note
6
for more information.