Annual report pursuant to Section 13 and 15(d)

QUARTERLY FINANCIAL DATA (UNAUDITED) (Details)

v3.20.4
QUARTERLY FINANCIAL DATA (UNAUDITED) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ 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]                      
Revenue from Contract with Customer, Product and Service [Extensible List]                 us-gaap:ServiceMember us-gaap:ServiceMember us-gaap:ServiceMember
REVENUE - Service revenue $ 154,344 $ 133,710 $ 106,109 $ 395,069 $ 434,794 $ 541,847 $ 529,494 $ 546,179 $ 789,232 $ 2,052,314 $ 1,704,562
Gross profit 38,698 34,118 37,916 94,221 129,101 144,925 143,276 164,656      
Net (loss) income $ (44,112) $ (29,184) $ (25,920) $ (7,804) $ 22,675 $ 34,397 $ 36,133 $ 69,805 $ (107,020) $ 163,010 $ 173,862
NET (LOSS) INCOME PER COMMON SHARE:                      
Basic (in dollars per share) $ (0.44) $ (0.29) $ (0.26) $ (0.08) $ 0.23 $ 0.34 $ 0.36 $ 0.70 $ (1.06) $ 1.62 $ 2.08
Diluted (in dollars per share) $ (0.44) $ (0.29) $ (0.26) $ (0.08) $ 0.22 $ 0.33 $ 0.35 $ 0.67 $ (1.06) $ 1.57 $ 2.00
Weighted average common shares outstanding:                      
Basic (in shares) 100,911 100,897 100,821 100,687 100,618 100,606 100,425 100,232 100,829 100,472 83,460
Diluted (in shares) 100,911 100,897 100,821 100,687 103,055 103,652 104,379 104,123 100,829 103,750 87,046