XML 75 R58.htm IDEA: XBRL DOCUMENT v3.6.0.2
Quarterly financial data (unaudited) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Quarterly financial data (unaudited) [Abstract]                      
Revenue $ 151,663 $ 142,914 $ 91,241 $ 102,964 $ 159,784 $ 158,378 $ 119,022 $ 52,147 $ 488,782 $ 489,331 $ 404,466
Income from operations 50,929 35,478 (2,042) 21,157 65,146 63,159 35,104 (21,895)      
Net income from continuing operations 32,289 20,388 (2,042) 11,889 42,491 42,088 22,565 (15,728) 62,524 91,416 54,266
Income (loss) from discontinued operations 5,103 952 (8,905) (7,898) (9,144) (5,145) (8,465) (5,792) (10,748) (28,546) (17,525)
Net income $ 37,392 $ 21,340 $ (10,947) $ 3,991 $ 33,347 $ 36,943 $ 14,100 $ (21,520) $ 51,776 $ 62,870 $ 36,741
Net income per share from continuing operations-basic (in dollars per share) $ 0.80 $ 0.50 $ (0.05) $ 0.30 $ 1.08 $ 1.08 $ 0.59 $ (0.42) $ 1.56 $ 2.37 $ 1.45
Net loss per share from discontinued operations-basic (in dollars per share) 0.13 0.02 (0.22) (0.20) (0.23) (0.14) (0.22) (0.15) (0.27) (0.74) (0.47)
Net income per share - basic (in dollars per share) 0.93 0.52 (0.27) 0.10 0.85 0.94 0.37 (0.57) 1.29 1.63 0.98
Net income per share from continuing operations-diluted (in dollars per share) 0.67 0.43 (0.05) 0.26 0.90 0.90 0.50 (0.42) 1.35 2.02 1.26
Net loss per share from discontinued operations-diluted (in dollars per share) 0.10 0.02 (0.22) (0.16) (0.19) (0.11) (0.18) (0.15) (0.22) (0.61) (0.38)
Net income per share-diluted $ 0.77 $ 0.45 $ (0.27) $ 0.10 $ 0.71 $ 0.79 $ 0.32 $ (0.57) $ 1.13 $ 1.41 $ 0.88