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Taxes on Income, Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Deferred tax assets [Abstract]    
Allowance for doubtful accounts $ 2,105 $ 1,875
Inventory 5,017 3,795
Insurance accruals 4,119 4,599
Deferred compensation 1,291 1,849
Unrealized loss on defined benefit plans 9,891 11,097
Operating loss carryforwards 81,867 15,540
Pension benefits 6,559 549
Other 22,421 16,301
Deferred tax assets, gross 133,270 55,605
Valuation allowances (25,568) (15,308)
Deferred tax assets, net of valuation allowance 107,702 40,297
Deferred tax liabilities [Abstract]    
Property (526,873) (428,947)
Deferred state taxes (74,638) (58,366)
Goodwill and other intangibles (34,235) (9,015)
Other (14,741) (12,420)
Deferred tax liabilities (650,487) (508,748)
Net deferred tax liabilities (542,785) (468,451)
Operating Loss Carryforward [Abstract]    
Deferred tax assets 18,922  
Historical net operating loss inherited amount 35,133  
State operating loss deferred tax assets 19,039 9,289
Operating loss carryforwards, net of valuation allowance $ 17,027 $ 9,289
Expiration dates, operating loss carryforwards Dec. 31, 2037  
Unrecognized tax benefits including interest and penalties $ 1,909  
Amount that would impact the effective tax rate, if recognized 1,182  
Canada [Member]    
Operating Loss Carryforward [Abstract]    
Operating loss carryforwards $ 8,541  
Expiration dates, operating loss carryforwards Dec. 31, 2038  
State and Local Jurisdiction [Member] | Minimum [Member]    
Open Tax Year [Abstract]    
Years open to audit under the statute of limitations 2012  
State and Local Jurisdiction [Member] | Maximum [Member]    
Open Tax Year [Abstract]    
Years open to audit under the statute of limitations 2017  
Internal Revenue Service (IRS) [Member] | Minimum [Member]    
Open Tax Year [Abstract]    
Years open to audit under the statute of limitations 2015  
Internal Revenue Service (IRS) [Member] | Maximum [Member]    
Open Tax Year [Abstract]    
Years open to audit under the statute of limitations 2017