Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Accounting Policies - Deferred Gains (Details)

v3.19.1
Basis of Presentation and Accounting Policies - Deferred Gains (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Jan. 01, 2019
Jan. 01, 2018
Deferred Gains [Roll Forward]        
Balance at beginning of period $ 43,664 $ 72,453    
Balance at end of period 14,126 69,378    
Operating Expense        
Deferred Gains [Roll Forward]        
Amortization of deferred gains on sale of property 0 2,557    
Gain (Loss) on Disposition of Assets        
Deferred Gains [Roll Forward]        
Amortization of deferred gains on sale of property $ 331 $ 518    
Accounting Standards Update 2016-02 | Sale-Leaseback | Retained Earnings        
Nature of Operations and Accounting Policies [Line Items]        
Cumulative Effect of New Accounting Principle in Period of Adoption, Before Tax     $ 29,207 $ 0