Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Activity (Details)

v3.19.1
Summary of Significant Accounting Policies - Activity (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2019
Jan. 01, 2019
Dec. 31, 2018
Accounting Policies [Abstract]      
Finance Lease, Right-of-Use Asset $ 39,759 $ 18,948 $ 18,900
Operating Lease, Right-of-Use Asset 343,221 387,970  
Leases, Right-of-Use Asset   406,900  
Finance Lease, Liability, Current 5,238 728  
Operating Lease, Liability, Current 45,357 48,104  
Finance Lease, Liability, Noncurrent 36,764 19,829  
Operating Lease, Liability, Noncurrent 308,159 350,818  
Finance Lease, Right-of-Use Asset, New Leases   0  
Operating Lease, Right-of-Use Asset, New Leases   0  
Finance Lease, Liability, Current, New Leases   0  
Operating Lease, Liability, Current, New Leases   21  
Finance Lease, Liability, Noncurrent, New Leases   0  
Operating Lease, Liability, Noncurrent, New Leases   0  
Finance Lease, Right-of-Use Asset, Modifications   21,520  
Operating Lease, Right-of-Use Asset, Modifications   (33,697)  
Finance Lease, Liability, Current, Modifications   4,510  
Operating Lease, Liability, Current, Modifications   (1,473)  
Finance Lease, Liability, Noncurrent, Modifications   16,935  
Operating Lease, Liability, Noncurrent, Modifications   $ (32,262)  
Finance Lease, Right-of-Use Asset, Amortization (709)    
Operating Lease, Right-of-Use Asset, Amortization (11,052)    
Finance Lease, Liability, Current, Amortization 0    
Operating Lease, Liability, Current, Amortization (1,295)    
Finance Lease, Liability, Noncurrent, Amortization 0    
Operating Lease, Liability, Noncurrent, Amortization $ (10,397)