Annual report pursuant to Section 13 and 15(d)

SUMMARY QUARTERLY CONSOLIDATED FINANCIAL INFORMATION (UNAUDITED) (Details)

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SUMMARY QUARTERLY CONSOLIDATED 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 Disclosure [Abstract]                      
Total revenues $ 60,287 $ 66,465 $ 32,100 $ 61,135 $ 71,815 $ 74,682 $ 71,615 $ 53,952 $ 219,987 $ 272,064 $ 314,369
Total operating costs 63,935 72,461 44,248 75,978 91,936 92,010 83,171 72,231 256,622 339,348 340,803
Operating loss (income) (3,648) (5,996) (12,148) (14,843) (20,121) (17,328) (11,556) (18,279) (36,635) (67,284) (26,434)
Total other income (expenses) 14,030 (2,918) (26,878) (2,248) 5,324 5,471 (1,403) 3,679 (18,014) 13,071 (11,965)
Income tax expense (benefit) 436 498 500 271 479 162 0 0 1,705 641 284
Net Income (loss) 9,946 (9,412) (39,526) (17,362) (15,276) (12,019) (12,959) (14,600) (56,354) (54,854) (38,683)
Preferred dividends (1,395) (1,395) (1,395) (1,395) (1,395) (1,395) (1,395) (1,395) (5,580) (5,580) (5,580)
Income (loss) applicable to common stockholders $ 8,551 $ (10,807) $ (40,921) $ (18,757) $ (16,671) $ (13,414) $ (14,354) $ (15,995) $ (61,934) $ (60,434) $ (44,263)
Income (loss) applicable to common stock, per share                      
Basic (in dollars per share) $ 0.13 $ (0.16) $ (0.61) $ (0.28) $ (0.25) $ (0.20) $ (0.21) $ (0.24) $ (0.92) $ (0.90) $ (0.66)
Diluted (in dollars per share) $ 0.13 $ (0.16) $ (0.61) $ (0.28) $ (0.25) $ (0.20) $ (0.21) $ (0.24) $ (0.92) $ (0.90) $ (0.66)
Weighted average number of shares of common stock outstanding                      
Basic (in shares) 67,238,624 67,212,532 67,111,843 67,069,534 67,060,440 67,040,692 67,029,610 67,027,104 67,158,745 67,039,556 66,993,543
Diluted (in shares) 67,833,329 67,212,532 67,111,843 67,069,534 67,060,440 67,040,692 67,029,610 67,027,104 67,158,745 67,039,556 66,993,543