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Stockholders' Equity (Deficit) - Changes by Component (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning balance | $ 1,541,472 | $ 1,814,789 | $ 1,078,350
Cumulative credit risk adjustment | 0 | 0 | (9,211)
Ending balance | (737,317) | 1,541,472 | 1,814,789
(Loss) gain on extinguishment of debt | (4,601) | (12,437) | 104
Accumulated Other Comprehensive Income (Loss) |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning balance | (1,679) | (1,950) | (1,845)
Cumulative credit risk adjustment |  |  | (9,211)
Change in net unrealized gain (loss) | 5,283 | 271 | 4,783
Amounts reclassified to net income |  |  | 4,323
Other comprehensive income (loss) | 5,283 | 271 | 9,106
Ending balance | 3,604 | (1,679) | (1,950)
Foreign currency translation |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning balance | (1,679) | (1,950) | (553)
Cumulative credit risk adjustment |  |  | 0
Change in net unrealized gain (loss) | 5,283 | 271 | (1,397)
Amounts reclassified to net income |  |  | 0
Other comprehensive income (loss) | 5,283 | 271 | (1,397)
Ending balance | 3,604 | (1,679) | (1,950)
Unrealized loss on investment securities |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning balance | 0 | 0 | (1,292)
Cumulative credit risk adjustment |  |  | 0
Change in net unrealized gain (loss) | 0 | 0 | (1,510)
Amounts reclassified to net income |  |  | 2,802
Other comprehensive income (loss) | 0 | 0 | 1,292
Ending balance | 0 | 0 | 0
Other-than-temporary impairment losses |  |  | 1,800
Realized losses on investments |  |  | 1,000
(Loss) gain on extinguishment of debt |  |  | 1,500
Redemption Note |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning balance | 0 | 0 | 0
Cumulative credit risk adjustment |  |  | (9,211)
Change in net unrealized gain (loss) | 0 | 0 | 7,690
Amounts reclassified to net income |  |  | 1,521
Other comprehensive income (loss) | 0 | 0 | 9,211
Ending balance | $ 0 | $ 0 | $ 0

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- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12355-112629 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12317-112629 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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