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Note 5 - Disclosure of Changes in Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]      
Beginning Balance $ (1,878) $ 1,204  
Other comprehensive income (loss) before reclassifications $ (7,624) $ (3,082)  
Amounts reclassified from AOCL  
Net current-period other comprehensive income (loss) $ (7,624) $ (3,082) $ 1,238
Ending Balance (9,502) (1,878) 1,204
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]      
Beginning Balance (13,243) (4,393)  
Other comprehensive income (loss) before reclassifications 1,105 [1] (8,922) [2]  
Amounts reclassified from AOCL 776 [3] 72 [4]  
Net current-period other comprehensive income (loss) 1,881 (8,850) 7,688
Ending Balance (11,362) (13,243) (4,393)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]      
Beginning Balance (646) 774  
Other comprehensive income (loss) before reclassifications $ (965) [5] $ (1,420) [6]  
Amounts reclassified from AOCL  
Net current-period other comprehensive income (loss) $ (965) $ (1,420) 774
Ending Balance (1,611) (646) 774
Beginning Balance (15,767) (2,415)  
Other comprehensive income (loss) before reclassifications (7,484) (13,424)  
Amounts reclassified from AOCL 776 72  
Net current-period other comprehensive income (loss) (6,708) (13,352) 12,081
Ending Balance $ (22,475) $ (15,767) $ (2,415)
[1] Represents unrecognized actuarial gains of $1,829, net of tax effect of $(724), included in the computation of net periodic pension cost for the year ended December 31, 2015. See Note 14, “Benefit Plans,” to the consolidated financial statements for additional information.
[2] Represents unrecognized actuarial losses of $(14,614), net of tax benefit of $5,692, included in the computation of net periodic pension cost for the year ended December 31, 2014. See Note 14, “Benefit Plans,” to the consolidated financial statements for additional information.
[3] Represents actuarial losses of $1,228, net of tax effect of $(452), amortized to net periodic pension cost for the year ended December 31, 2015. See Note 14, “Benefit Plans,” to the consolidated financial statements for additional information.
[4] Represents actuarial losses of $106, net of tax effect of $(34), amortized to net periodic pension cost for the year ended December 31, 2014. See Note 14, “Benefit Plans,” to the consolidated financial statements for additional information.
[5] Represents unrealized losses of $(1,574), net of tax benefit of $609 for the year ended December 31, 2015.
[6] Represents unrealized losses of $(2,279), net of tax benefit of $859 for the year ended December 31, 2014.