Quarterly report pursuant to Section 13 or 15(d)

Debt, Net (Details 2)

v3.20.1
Debt, Net (Details 2) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Carrying Amount    
Carrying amount and estimated fair value of debt    
Long-term debt $ 2,076,839 $ 1,831,139
Carrying Amount | Unsecured senior notes    
Carrying amount and estimated fair value of debt    
Long-term debt 1,193,388 1,192,910
Carrying Amount | Other fixed-rate debt    
Carrying amount and estimated fair value of debt    
Long-term debt 143,585 144,468
Carrying Amount | Variable-rate secured debt    
Carrying amount and estimated fair value of debt    
Long-term debt 739,866 493,761
Estimated Fair Value    
Carrying amount and estimated fair value of debt    
Long-term debt 2,112,499 1,873,310
Estimated Fair Value | Unsecured senior notes    
Carrying amount and estimated fair value of debt    
Long-term debt 1,223,259 1,227,441
Estimated Fair Value | Other fixed-rate debt    
Carrying amount and estimated fair value of debt    
Long-term debt 142,201 149,907
Estimated Fair Value | Variable-rate secured debt    
Carrying amount and estimated fair value of debt    
Long-term debt $ 747,039 $ 495,962