Annual report pursuant to Section 13 and 15(d)

Quarterly Financial Information (Unaudited) (Details)

v3.20.4
Quarterly Financial Information (Unaudited) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Quarterly Financial Information                      
Total operating revenues $ 203,860 $ 233,415 $ 219,736 $ 243,708 $ 239,067 $ 243,795 $ 255,618 $ 54,108      
Total operating expenses 88,877 81,598 85,010 762,872 431,670 577,884 138,027 43,500 $ 1,018,357 $ 1,191,081 $ 43,851
Operating income (loss) 114,983 151,817 134,726 (519,164) (192,603) (334,089) 117,591 10,608 (117,638) (398,493) (43,851)
Net income (loss) and comprehensive income (loss) $ 76,458 $ 105,507 $ 88,441 $ (392,933) $ (144,559) $ (289,477) $ 69,274 $ 9,648 $ (122,527) $ (355,114) $ 66,608
Net income (loss) per common share-basic (in dollars per share) $ 0.16 $ 0.22 $ 0.19 $ (0.81) $ (0.29) $ (0.57) $ 0.14 $ 0.04 $ (0.26) $ (0.80) $ 0.33
Net income (loss) per common share-diluted (in dollars per share) $ 0.16 $ 0.22 $ 0.18 $ (0.81) $ (0.29) $ (0.57) $ 0.14 $ 0.04 $ (0.26) $ (0.80) $ 0.33