Long-Term Obligations and Notes Payable Wells ABL (Details) $ in Millions	Mar. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)	Mar. 30, 2018 CAD ($)
Secured Debt
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 694,800,000
Periodic payment, principal	$ 1,750,000
Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	1,000,000,000.0		$ 50.0
Revolving Credit Facility | Line of Credit | Wells Revolving Loan
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	450,000,000.0
Revolving Credit Facility | Line of Credit | Wells Term Loan
Debt Instrument [Line Items]
Delayed single draw term loan	70,000,000.0
Revolving Credit Facility | Line of Credit | Wells ABL
Debt Instrument [Line Items]
Maximum borrowing capacity under accordion feature	725,000,000.0
Principal amount of the Holdings Note	15,000,000.0
Revolving Credit Facility | Secured Debt | Wells Term Loan
Debt Instrument [Line Items]
Periodic payment, principal	5,800,000
Revolving Credit Facility, Swing Line Loan | Line of Credit | Wells Revolving Loan
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	45,000,000.0
Letter of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 179,400,000
Letter of Credit | Line of Credit | Wells Revolving Loan
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 200,000,000.0