XML 36 R24.htm IDEA: XBRL DOCUMENT v3.8.0.1
Income Taxes Income Tax Narrative (Details) - USD ($)
$ in Millions
 3 Months Ended
Dec. 22, 2017
Mar. 31, 2018
Dec. 31, 2017
Mar. 31, 2017
Entity Location [Line Items]        
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Provisional Income Tax Expense (Benefit)     $ 27.3  
UNITED STATES        
Entity Location [Line Items]        
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 35.00% 25.3572%   37.512%
MEXICO        
Entity Location [Line Items]        
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent   30.00%    
GUATEMALA        
Entity Location [Line Items]        
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent   25.00%    
EL SALVADOR        
Entity Location [Line Items]        
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent   30.00%