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Note 10 - Credit Agreements (Details Textual)
$ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended
Jul. 01, 2016
Jul. 01, 2015
Apr. 01, 2014
Nov. 30, 2016
USD ($)
May 31, 2015
USD ($)
Mar. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Sep. 30, 2014
USD ($)
Apr. 30, 2014
USD ($)
Dec. 31, 2016
USD ($)
Sep. 30, 2016
USD ($)
Dec. 31, 2015
USD ($)
Sep. 30, 2015
USD ($)
Jun. 30, 2014
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
May 31, 2013
USD ($)
Gain Loss on Change in Cash Flows Related to Debt [1]                             $ (2,957) $ (2,381) $ 16,014  
Short-term Debt                   $ 31,198   $ 8,594     31,198 8,594    
ABL Revolving Credit Facility [Member]                                    
Line of Credit Facility, Maximum Borrowing Capacity         $ 150,000                          
Uncommitted Incremental Term Loan Facility         50,000                          
Amended ABL Facility [Member]                                    
Line of Credit Facility, Maximum Borrowing Capacity         250,000                          
Uncommitted Incremental Term Loan Facility         $ 100,000                          
Debt Instrument, Basis Spread on Variable Rate         (0.50%)                          
Debt Issuance Costs, Net                       $ 540       $ 540    
Line of Credit Facility, Unused Capacity, Decrease In Commitment Fee Percentage         0.125%                          
Proceeds from Lines of Credit         $ 100,000                          
Long-term Line of Credit                   100,000         100,000      
Line of Credit Facility, Remaining Borrowing Capacity                   $ 145,593         $ 145,593      
Base Rate [Member] | ABL Revolving Credit Facility [Member]                                    
Debt Instrument, Basis Spread on Variable Rate                             1.00%      
Adjusted LIBOR Rate [Member] | ABL Revolving Credit Facility [Member]                                    
Debt Instrument, Basis Spread on Variable Rate                             2.00%      
Term Loan [Member]                                    
Line of Credit Facility, Maximum Borrowing Capacity                                   $ 1,200,000
Uncommitted Incremental Term Loan Facility                                   $ 300,000
Net Debt Leverage Ratio Threshold                             3      
Net Debt Leverage Ratio Achieved     3                     3        
Debt Instrument, Interest Rate, Increase (Decrease)                     0.25%   0.25% (0.25%)   0.25% 0.25%  
Gain Loss on Change in Cash Flows Related to Debt                     $ (2,957)   $ (2,381) $ 16,014        
Net Debt Leverage Ratio Not Achieved 3 3               3 3 3 3 3 3 3 3  
Debt Issuance Costs, Net       $ 4,242 1,528                          
Debt Instrument, Fee Amount       315 49                          
Repayments of Long-term Debt       25,000 $ 100,000 $ 50,000 $ 25,000 $ 50,000 $ 12,000                  
Write off of Deferred Debt Issuance Cost       $ 574                       $ 4,795 $ 2,084  
Term Loan [Member] | Base Rate [Member]                                    
Debt Instrument, Basis Spread on Variable Rate                             1.75%      
Term Loan [Member] | Base Rate [Member] | Net Debt Leverage Ratio Threshold [Member]                                    
Debt Instrument, Basis Spread on Variable Rate                             1.50%      
Term Loan [Member] | Adjusted LIBOR Rate [Member]                                    
Debt Instrument, Basis Spread on Variable Rate                             2.75%      
Term Loan [Member] | Adjusted LIBOR Rate [Member] | Net Debt Leverage Ratio Threshold [Member]                                    
Debt Instrument, Basis Spread on Variable Rate                             2.50%      
Term Loan [Member] | LIBOR Floor Rate [Member]                                    
Debt Instrument, Basis Spread on Variable Rate                             0.75%      
[1] For the year ended December 31, 2016, represents a non-cash loss in the third quarter 2016 relating to the continued 25 basis point increase in borrowing costs as a result of the credit agreement leverage ratio remaining above 3.0 times and expected to remain above 3.0 based on current projections. For the year ended December 31, 2015, represents a non-cash loss relating to a 25 basis point increase in borrowing costs as a result of the credit agreement leverage ratio rising above 3.0 times effective third quarter 2015 and expected to remain above 3.0 times based on projections at the time. For the year ended December 31, 2014 represents a non-cash gain relating to a 25 basis point reduction in borrowing costs as a result of the credit agreement leverage ratio falling below 3.0 times effective second quarter 2014 and expected to remain below 3.0 times based on projections at the time.