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Basis of Presentation and Significant Accounting Policies, Recently Adopted Accounting Pronouncements (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Recently Adopted Accounting Pronouncements |  |  |
Cash and cash equivalents at beginning of period | $ 160,063 | $ 104,374 | $ 138,645
Cash, cash equivalents and restricted cash at beginning of period | 340,669 | 243,772 | 167,960
Net increase (decrease) in cash, cash equivalents and restricted cash | 169,893 | 96,897 | 75,812
Cash and cash equivalents at end of period | 299,687 | 160,063 | 104,374
Cash, cash equivalents and restricted cash at end of period | 510,562 | 340,669 | 243,772
Net cash provided by (used in) operating activities: changes in operating assets and liabilities | (8,332) | (8,205) | (308)
Net cash used in investing activities | (994,740) | (681,875) | (906,845)
Net cash provided by financing activities | 1,391,170 | 816,507 | 522,953
Unrealized loss on securities available-for-sale, at fair value |  |  | (382)
Retained Earnings (Accumulated Deficit) | $ (60,920) | (74,133) |
Previously reported under GAAP |  |  |
Recently Adopted Accounting Pronouncements |  |  |
Cash and cash equivalents at beginning of period |  | 104,374 | 138,645
Net decrease in cash and cash equivalents |  |  | (34,271)
Cash and cash equivalents at end of period |  |  | 104,374
Net cash provided by (used in) operating activities: changes in operating assets and liabilities |  |  | 822
Net cash used in investing activities |  |  | (907,949)
Net cash provided by financing activities |  |  | 412,844
ASU 2016-15 and ASU 2016-18 |  |  |
Recently Adopted Accounting Pronouncements |  |  |
Cash, cash equivalents and restricted cash at beginning of period |  | $ 243,772 | 167,960
Net increase (decrease) in cash, cash equivalents and restricted cash |  |  | 75,812
Cash, cash equivalents and restricted cash at end of period |  |  | 243,772
Net cash provided by (used in) operating activities: changes in operating assets and liabilities |  |  | (308)
Net cash used in investing activities |  |  | (906,845)
Net cash provided by financing activities |  |  | $ 522,953

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3044-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118951113&loc=d3e6676-107765 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes. + References No definition available. + Details
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