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Note 1 - Basis of Presentation (Details) - Changes in Accumulated Other Comprehensive Income (Loss) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning Balance $ (4,139) $ (12,472) $ (2,415) $ (14,496)
Other comprehensive income (loss) before reclassifications (1,025) 867 (2,749) 886
Amounts reclassified from accumulated other comprehensive loss 0 376 [1] 0 2,381 [2]
Net current-period other comprehensive income (loss) (1,025) 1,243 (2,749) 3,267
Ending Balance (5,164) (11,229) (5,164) (11,229)
Accumulated Translation Adjustment [Member]
        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning Balance 1,188 (15) 1,204 (34)
Other comprehensive income (loss) before reclassifications (2,014) 867 (2,030) 886
Amounts reclassified from accumulated other comprehensive loss 0 0 [1] 0 0 [2]
Net current-period other comprehensive income (loss) (2,014) 867 (2,030) 886
Ending Balance (826) 852 (826) 852
Accumulated Defined Benefit Plans Adjustment [Member]
        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning Balance (4,393) (12,081) (4,393) (12,081)
Other comprehensive income (loss) before reclassifications 0 0 0 0
Amounts reclassified from accumulated other comprehensive loss 0 0 [1] 0 0 [2]
Net current-period other comprehensive income (loss) 0 0 0 0
Ending Balance (4,393) (12,081) (4,393) (12,081)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning Balance (934) (376) 774 (2,381)
Other comprehensive income (loss) before reclassifications 989 0 (719) 0
Amounts reclassified from accumulated other comprehensive loss 0 376 [1] 0 2,381 [2]
Net current-period other comprehensive income (loss) 989 376 (719) 2,381
Ending Balance $ 55 $ 0 $ 55 $ 0
[1] Represents amortization of unrealized losses on interest rate swaps to interest expense of $393 net of tax benefit of $17 for the three months ended September 30, 2013.
[2] Represents amortization of unrealized losses on interest rate swaps to interest expense of $2,490 net of tax benefit of $109 for the nine months ended September 30, 2013.