Annual report pursuant to Section 13 and 15(d)

Selected Quarterly Financial Data (Unaudited) (Details)

v3.8.0.1
Selected Quarterly Financial Data (Unaudited) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Summary of quarterly financial data                      
Total revenues $ 193,699 $ 263,495 $ 314,213 $ 296,096 $ 275,489 $ 298,035 $ 357,100 $ 291,037 $ 1,067,503 $ 1,221,661 $ 491,738
Total costs and expenses 347,321 321,785 340,656 337,803 325,889 321,658 328,834 318,555 1,347,565 1,294,936 590,219
Net income (loss) (213,905) (46,442) (17,528) (30,995) (13,661) (14,977) 15,533 (11,978) (308,870) (25,083) (31,428)
Net income (loss) attributable to common shareholders $ (213,905) $ (46,442) $ (17,528) $ (30,995) $ (13,661) $ (14,977) $ 15,533 $ (11,978) $ (308,870) $ (25,083) $ (30,028)
Earnings (loss) per share, diluted (in dollars per share) $ (0.38) $ (0.08) $ (0.03) $ (0.06) $ (0.02) $ (0.03) $ 0.03 $ (0.02)      
Earnings (loss) per share, diluted (in dollars per share) $ (0.38) $ (0.08) $ (0.04) $ (0.06) $ (0.04) $ (0.03) $ 0.02 $ (0.02)