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Subsequent Events - Additional Information (Detail) - USD ($) | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jan. 31, 2019 | Dec. 31, 2019 | Dec. 31, 2019 | Feb. 28, 2020 | Jun. 03, 2019
Subsequent Event [Line Items] |  |  |  |  |
Cash Dividends payable, amount per share | $ 0.10 |  |  |  |
Cash Dividends payable, date to be paid | Mar. 20, 2020 |  |  |  |
Cash Dividends payable, record date | Feb. 21, 2020 |  |  |  |
Investment impairment |  | $ 15,000,000.0 | $ 15,000,000 |  |
Real War In [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Equity method investments |  | $ 0 | $ 0 |  | $ 15,000,000.0
Subsequent Event | Real War In [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Repayment of debt demanded |  |  |  | $ 25,000,000.0 |

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- Definition Date the declared dividend will be paid, in CCYY-MM-DD format. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 + Details
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- Definition The per share amount of a dividend declared, but not paid, as of the financial reporting date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 + Details
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- Definition This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 35 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=118954474&loc=d3e32787-111569 + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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