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Debt and Commitments (Details Narrative)
1 Months Ended 12 Months Ended
Feb. 02, 2017
USD ($)
Jun. 24, 2014
USD ($)
Feb. 24, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Oct. 15, 2014
USD ($)
Jun. 30, 2014
Jun. 16, 2014
USD ($)
Debt Instrument [Line Items]                    
Premium paid on convertible debt redemption       $ 0 $ 0 $ 14,868,000        
Notes and overdrafts payable       30,825,000 22,680,000          
Letters of credit outstanding, amount       7,320,000            
Long-term Debt, Maturities, Repayments of Principal, thereafter       101,784,000            
Long-term Debt, Maturities, Repayments of Principal in 2018       364,467,000            
Interest Expense [Member]                    
Debt Instrument [Line Items]                    
Fees and expenses paid with amendment             $ 1,261,000      
Convertible Debt [Member]                    
Debt Instrument [Line Items]                    
Convertible notes       0 0          
Bank Overdrafts [Member]                    
Debt Instrument [Line Items]                    
Notes and overdrafts payable       125,000 $ 180,000          
Line of Credit [Member]                    
Debt Instrument [Line Items]                    
Maximum borrowing capacity       $ 55,000,000            
Line of credit facility, interest rate at period end       1.96% 1.56%          
Notes and overdrafts payable       $ 30,700,000 $ 22,500,000          
Repayment period       1 month            
Convertible Debt [Member] | 3.375% Convertible Notes [Member]                    
Debt Instrument [Line Items]                    
Convertible notes stated interest rate                 3.375% 3.375%
Repayments of convertible debt, including premium on conversion   $ 70,497,000                
Premium paid on convertible debt redemption   14,868,000                
Adjustments to additional paid in capital, premium paid on convertible debt redemption   9,326,000                
Adjustments to additional paid in capital, income tax benefit from premium paid on convertible debt redemption, tax   5,542,000                
Contingent convertible debt interest, amount recaptured for income tax purpose   23,565,000                
Reduction in short-term deferred tax liabilities   8,784,000                
Debt instrument, convertible, effective interest rate       8.00%            
Debt Conversion, Converted Instrument, Amount Redeemed with Accrued Interest   7,000                
Debt Conversion, Converted Instrument, Amount   55,405,000                
Convertible Note Repurchases, Par Value                   $ 224,000
Convertible notes   $ 55,412,000                
Revolving Credit Agreement [Member]                    
Debt Instrument [Line Items]                    
Carrying amount of debt       $ 363,300,000 379,700,000          
Maximum borrowing capacity       750,000,000            
Line of Credit Facility With Accordian Feature, Maximum Borrowing Capacity       1,000,000,000            
Line of credit facility, amount outstanding       363,300,000 379,700,000          
Line of credit facility remaining borrowing capacity       $ 386,700,000 $ 370,300,000          
Line of credit facility, interest rate at period end       1.86% 1.50%          
Revolving Credit Agreement [Member] | Subsidiaries [Member]                    
Debt Instrument [Line Items]                    
Line of credit facility, amount outstanding       $ 100,000,000            
Bank Overdrafts [Member]                    
Debt Instrument [Line Items]                    
Repayment period       2 days            
Senior Notes [Member] | 3.97% Senior Notes [Member]                    
Debt Instrument [Line Items]                    
Debt instrument, face amount               $ 100,000,000    
Convertible notes stated interest rate               3.97%    
Carrying amount of debt       $ 100,000,000 $ 100,000,000          
Debt Instrument, Prepayment Percentage of Principal Amount               100.00%    
Foreign bank borrowings [Member]                    
Debt Instrument [Line Items]                    
Carrying amount of debt       1,416,000 $ 421,000          
Euro [Member] | Revolving Credit Agreement [Member]                    
Debt Instrument [Line Items]                    
Maximum borrowing capacity       $ 500,000,000            
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | Revolving Credit Agreement [Member]                    
Debt Instrument [Line Items]                    
Basis spread on variable rate       1.10%            
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] | Revolving Credit Agreement [Member]                    
Debt Instrument [Line Items]                    
Basis spread on variable rate       1.70%            
Revolving Credit Facility [Member]                    
Debt Instrument [Line Items]                    
Debt Instrument, Covenant, Consolidated Senior Credit to Consolidated EBITDA (not more than)       3.25            
Debt Instrument, Covenant, Total Consolidated Debt to Consolidated EBITDA (not more than)       4.00            
Debt Instrument, Covenant, Consolidated EBITDA to Consolidated Cash Interest Expense (not less than)       4.25            
Debt Instrument, Covenant, Material Acquisition, Consolidated Senior Credit to Consolidated EBITDA (not more than)       3.50            
Debt Instrument, Covenant, Material Acquisition, Total Consolidated Debt to Consolidated EBITDA (not more than)       4.25            
Revolving Credit Facility [Member] | Fourth Amendment, Maturity February 2022 [Member]                    
Debt Instrument [Line Items]                    
Long-term Debt, Maturities, Repayments of Principal, thereafter       $ 363,300,000            
Subsequent Event [Member] | Revolving Credit Facility [Member] | Fourth Amendment, Maturity February 2022 [Member]                    
Debt Instrument [Line Items]                    
Maximum borrowing capacity $ 850,000,000   $ 850,000,000              
Debt Instrument, Covenant, Consolidated Senior Credit to Consolidated EBITDA (not more than)     3.25              
Debt Instrument, Covenant, Total Consolidated Debt to Consolidated EBITDA (not more than)     3.75              
Debt Instrument, Covenant, Consolidated EBITDA to Consolidated Cash Interest Expense (not less than)     4.25              
Subsequent Event [Member] | Revolving Credit Facility [Member] | Fourth Amendment, Maturity February 2022, Accordion Feature [Member]                    
Debt Instrument [Line Items]                    
Maximum borrowing capacity 350,000,000                  
Subsequent Event [Member] | Revolving Credit Facility [Member] | Euro [Member] | Fourth Amendment, Maturity February 2022 [Member]                    
Debt Instrument [Line Items]                    
Maximum borrowing capacity $ 600,000,000   $ 600,000,000              
Subsequent Event [Member] | Revolving Credit Facility [Member] | Sterling [Member] | Fourth Amendment, Maturity February 2022 [Member]                    
Debt Instrument [Line Items]                    
Maximum borrowing capacity     600,000,000              
Subsequent Event [Member] | Revolving Credit Facility [Member] | Swiss Franc [Member] | Fourth Amendment, Maturity February 2022 [Member]                    
Debt Instrument [Line Items]                    
Maximum borrowing capacity     $ 600,000,000              
Subsequent Event [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | Fourth Amendment, Maturity February 2022 [Member]                    
Debt Instrument [Line Items]                    
Basis spread on variable rate 1.10%   1.10%              
Subsequent Event [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] | Fourth Amendment, Maturity February 2022 [Member]                    
Debt Instrument [Line Items]                    
Basis spread on variable rate 1.70%   1.70%              
Subsequent Event [Member] | Revolving Credit Facility [Member] | Base Rate [Member] | Minimum [Member] | Fourth Amendment, Maturity February 2022 [Member]                    
Debt Instrument [Line Items]                    
Basis spread on variable rate 0.10%   0.10%              
Subsequent Event [Member] | Revolving Credit Facility [Member] | Base Rate [Member] | Maximum [Member] | Fourth Amendment, Maturity February 2022 [Member]                    
Debt Instrument [Line Items]                    
Basis spread on variable rate 0.70%   0.70%