Quarterly report pursuant to Section 13 or 15(d)

Debt, Net (Details 2)

v3.20.2
Debt, Net (Details 2) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Carrying Amount    
Carrying amount and estimated fair value of debt    
Long-term debt $ 2,012,019 $ 1,831,139
Carrying Amount | Unsecured senior notes    
Carrying amount and estimated fair value of debt    
Long-term debt 1,193,870 1,192,910
Carrying Amount | Other fixed-rate debt    
Carrying amount and estimated fair value of debt    
Long-term debt 142,699 144,468
Carrying Amount | Variable-rate secured debt    
Carrying amount and estimated fair value of debt    
Long-term debt 675,450 493,761
Estimated Fair Value    
Carrying amount and estimated fair value of debt    
Long-term debt 2,036,313 1,873,310
Estimated Fair Value | Unsecured senior notes    
Carrying amount and estimated fair value of debt    
Long-term debt 1,224,800 1,227,441
Estimated Fair Value | Other fixed-rate debt    
Carrying amount and estimated fair value of debt    
Long-term debt 145,473 149,907
Estimated Fair Value | Variable-rate secured debt    
Carrying amount and estimated fair value of debt    
Long-term debt $ 666,040 $ 495,962