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Debt (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 15, 2018
Dec. 31, 2019
Jun. 30, 2019
Line of Credit Facility [Line Items]      
Debt, Long-term and Short-term, Combined Amount   $ 1,370,290 $ 1,023,567
Other Long-term Debt   15,387 14,361
Short-term debt   73,755 81,277
Long-term debt   $ 1,296,535 942,290
Description of variable rate basis   LIBOR  
Debt Instrument, Unamortized Discount   $ (10,773) (12,018) [1]
Line of Credit [Member]      
Line of Credit Facility [Line Items]      
Debt Instrument, Unamortized Discount   (2,419)  
Revolving Credit Facility [Member]      
Line of Credit Facility [Line Items]      
Debt, Long-term and Short-term, Combined Amount   965,676 621,224
Line of Credit [Member]      
Line of Credit Facility [Line Items]      
Line of Credit Facility, Current Borrowing Capacity   $ 1,564,857  
Line of Credit [Member] | Minimum [Member]      
Line of Credit Facility [Line Items]      
Basis spread on LIBOR   1.375%  
Commitment fee (percentage)   0.225%  
Line of Credit [Member] | Maximum [Member]      
Line of Credit Facility [Line Items]      
Basis spread on LIBOR   2.00%  
Commitment fee (percentage)   0.35%  
Revolving Loan, Maturity June 14, 2023 [Member]      
Line of Credit Facility [Line Items]      
Weighted average interest rate   3.39%  
Senior Notes due 2022 [Member]      
Line of Credit Facility [Line Items]      
Senior Notes   $ 400,000  
Senior Notes due 2026 [Member]      
Line of Credit Facility [Line Items]      
Senior Notes     $ 400,000
Proceeds from Issuance of Private Placement $ 400,000    
Debt Instrument, Interest Rate, Stated Percentage 7.00%    
Term Loan [Domain] | Line of Credit [Member]      
Line of Credit Facility [Line Items]      
Line of Credit Facility, Current Borrowing Capacity   477,600  
Revolving Loan, Maturity June 14, 2023 [Member]      
Line of Credit Facility [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity after June 14, 2018 Amendment   $ 1,087,257  
Redemption Any Time Prior to April 1, 2018 | Senior Notes due 2026 [Member]      
Line of Credit Facility [Line Items]      
Debt Instrument, Redemption Price, Percentage   107.00%  
Redemption Any Time Prior to April 1, 2018 - Percentage of Aggregate Outstanding Principal | Senior Notes due 2026 [Member]      
Line of Credit Facility [Line Items]      
Debt Instrument, Redemption Price, Percentage   100.00%  
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed   40.00%  
[1] Balances as of December 31, 2019 and June 30, 2019 are inclusive of short-term debt issuance costs and debt discounts of $2,419 for both periods presented.