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Product Warranty Obligations (Tables)
 12 Months Ended
Dec. 31, 2013
Product Warranty Obligations [Abstract]  
Changes in product warranty obligation
The following is a tabular reconciliation of the product warranty liability, excluding the deferred revenue related to our extended warranty coverage:
 
 
 
For the year ended December 31,
 
 
 
2013
  
2012
  
2011
 
 
 
  
  
 
Balance at beginning of year
 
$
36,111
  
$
24,643
  
$
17,835
 
Payments
  
(18,484
)
  
(19,801
)
  
(17,562
)
Provision for warranties issued
  
33,707
   
34,173
   
21,356
 
Changes in estimates for pre-existing warranties
  
(17,600
)
  
(2,904
)
  
3,014
 
Balance at end of year
 
$
33,734
  
$
36,111
  
$
24,643
 

The following is a tabular reconciliation of the deferred revenue related to extended warranty coverage:
 
 
 
For the year ended December 31,
 
 
 
2013
  
2012
  
2011
 
 
 
  
  
 
Balance at beginning of year
 
$
13,474
  
$
9,737
  
$
4,643
 
Deferred revenue on extended warranty contracts sold
  
11,998
   
5,547
   
6,368
 
Amortization of deferred revenue on extended warranty contracts
  
(2,380
)
  
(1,810
)
  
(1,274
)
Balance at end of year
 
$
23,092
  
$
13,474
  
$
9,737
 
Product warranty obligations included in consolidated balance sheets
Product warranty obligations and warranty related deferred revenues are included in the balance sheets as follows:
 
 
 
December 31,
 
 
 
2013
  
2012
 
Product warranty liability
 
  
 
Current portion - other accrued liabilities
 
$
26,080
  
$
26,284
 
Long-term portion - other long-term liabilities
  
7,654
   
9,827
 
Total
 
$
33,734
  
$
36,111
 
 
        
Deferred revenue related to extended warranty
        
Current portion - other accrued liabilities
 
$
3,325
  
$
2,468
 
Long-term portion - other long-term liabilities
  
19,767
   
11,006
 
Total
 
$
23,092
  
$
13,474