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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

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