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INVESTMENTS - Summary of Investments in Nonconsolidated Affiliates and Available-for-sale Securities (Detail) - USD ($)
$ in Thousands
 1 Months Ended 2 Months Ended 3 Months Ended 4 Months Ended 8 Months Ended 12 Months Ended
May 01, 2019
Jun. 30, 2019
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Mar. 31, 2019
May 01, 2019
Dec. 31, 2019
Dec. 31, 2019
Dec. 31, 2020
Dec. 31, 2018
Investments in and Advances to Affiliates, at Fair Value                            
Beginning balance   $ 79,128       $ 63,769     $ 88,740 $ 88,740 $ 54,238 $ 79,128 $ 63,769  
Impact of fresh start accounting $ (24,890)                 (24,890)        
Purchases of investments                   694 31,556   18,747  
Equity in loss (59) (24) $ 274 $ (58) $ (31) (564) $ (254) $ (1) (7) (66) (279) (279) (379) $ 116
Disposals                         (1,194)  
Distributions received                         (31)  
Loss on investments, net                   (10,237) (21,743)   (9,346)  
Other                   (3) (3)   (992)  
Ending balance 79,128   70,574       63,769     79,128 63,769 63,769 70,574 88,740
Available-for-sale Securities                            
Investments in and Advances to Affiliates, at Fair Value                            
Beginning balance   23,925       33,128     25,823 25,823 15,083 23,925 33,128  
Impact of fresh start accounting (8,842)                 (8,842)        
Purchases of investments                   0 24,103   9,595  
Equity in loss                   0 0   0  
Disposals                         (194)  
Distributions received                         0  
Loss on investments, net                   (1,895) 0   (7,116)  
Other                   (3) (6,058)   (3,957)  
Ending balance 23,925   31,456       33,128     23,925 33,128 33,128 31,456 25,823
Equity Method Investments                            
Investments in and Advances to Affiliates, at Fair Value                            
Beginning balance   24,629       10,952     24,104 24,104 9,643 24,629 10,952  
Impact of fresh start accounting (14,986)                 (14,986)        
Purchases of investments                   591 1,588   1,523  
Equity in loss                   (66) (279)   (379)  
Disposals                         (1,000)  
Distributions received                         (31)  
Loss on investments, net                   0 0   0  
Other                   0 0   0  
Ending balance 24,629   11,065       10,952     24,629 10,952 10,952 11,065 24,104
Other Investments                            
Investments in and Advances to Affiliates, at Fair Value                            
Beginning balance   30,574       16,989     38,813 38,813 29,512 30,574 16,989  
Impact of fresh start accounting (1,062)                 (1,062)        
Purchases of investments                   103 2,425   7,629  
Equity in loss                   0 0   0  
Disposals                         0  
Distributions received                         0  
Loss on investments, net                   (8,342) (21,003)   (959)  
Other                   0 6,055   2,965  
Ending balance 30,574   26,624       16,989     30,574 16,989 16,989 26,624 38,813
Marketable Equity Securities                            
Investments in and Advances to Affiliates, at Fair Value                            
Beginning balance   $ 0       $ 2,700     $ 0 0 0 0 2,700  
Impact of fresh start accounting 0                 0        
Purchases of investments                   0 3,440   0  
Equity in loss                   0 0   0  
Disposals                         0  
Distributions received                         0  
Loss on investments, net                   0 (740)   (1,271)  
Other                   0 0   0  
Ending balance $ 0   $ 1,429       $ 2,700     $ 0 $ 2,700 $ 2,700 $ 1,429 $ 0