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Note 5 - Accumulated Other Comprehensive Loss (Tables)
9 Months Ended
Sep. 30, 2016
Notes Tables  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
   
Foreign Currency Translation Adjustments
   
Defined Benefit Pension Plan
   
Unrealized Gain (Loss) on Cash Flow Hedges
   
Total
 
                                 
Beginning Balance
– July 1, 2016
  $ (20,234 )   $ (11,362 )   $ (2,899 )   $ (34,495 )
Other comprehensive gain (loss) before reclassifications
    (315 )     -       779   (1)   464  
Amounts reclassified from AOCL
    -       -       -       -  
Net current-period other comprehensive income (loss)
    (315 )     -       779       464  
Ending Balance
– September 30, 2016
  $ (20,549 )   $ (11,362 )   $ (2,120 )   $ (34,031 )
   
Foreign Currency Translation Adjustments
   
Defined Benefit Pension Plan
   
Unrealized Loss on Cash Flow Hedges
   
Total
 
                                 
Beginning Balance
– July 1, 2015
  $ (7,361 )   $ (13,243 )   $ (1,652 )   $ (22,256 )
Other comprehensive loss before reclassifications
    (1,072 )     -       (1,065 ) (2)   (2,137 )
Amounts reclassified from AOCL
    -       -       -       -  
Net current-period other comprehensive loss
    (1,072 )     -       (1,065 )     (2,137 )
Ending Balance
– September 30, 2015
  $ (8,433 )   $ (13,243 )   $ (2,717 )   $ (24,393 )
   
Foreign Currency Translation Adjustments
   
Defined Benefit Pension Plan
   
Unrealized Loss on Cash Flow Hedges
   
Total
 
                                 
Beginning Balance
– January 1, 2016
  $ (9,502 )   $ (11,362 )   $ (1,611 )   $ (22,475 )
Other comprehensive loss before reclassifications
    (11,047 )     -       (509 ) (3)   (11,556 )
Amounts reclassified from AOCL
    -       -       -       -  
Net current-period other comprehensive loss
    (11,047 )     -       (509 )     (11,556 )
Ending Balance
– September 30, 2016
  $ (20,549 )   $ (11,362 )   $ (2,120 )   $ (34,031 )
   
Foreign Currency Translation Adjustments
   
Defined Benefit Pension Plan
   
Unrealized Loss on Cash Flow Hedges
   
Total
 
                                 
Beginning Balance
– January 1, 2015
  $ (1,878 )   $ (13,243 )   $ (646 )   $ (15,767 )
Other comprehensive loss before reclassifications
    (6,555 )     -       (2,071 ) (4)   (8,626 )
Amounts reclassified from AOCL
    -       -       -       -  
Net current-period other comprehensive loss
    (6,555 )     -       (2,071 )     (8,626 )
Ending Balance
– September 30, 2015
  $ (8,433 )   $ (13,243 )   $ (2,717 )   $ (24,393 )