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Derivative Financial Instruments - Narrative (Details)
$ in Thousands, £ in Millions
12 Months Ended
Jun. 29, 2018
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2018
GBP (£)
Dec. 31, 2017
USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Cumulative foreign currency translation adjustment   $ (1,683)   $ (6,955)
Revolving credit facility | Net Investment Hedging        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Notional amount | £     £ 55  
Cross Currency Interest Rate Contract        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Loss on Contract Termination $ 6,000      
Maximum        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Estimate change in fair value of derivative for assumption of one percentage point change in the interest rate   $ 1,000