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Subsequent Events - Additional Information (Detail) - $ / shares |  |  | 3 Months Ended
--- | --- | --- | ---
Apr. 12, 2018 | Jan. 22, 2018 | Mar. 31, 2018 | Mar. 31, 2017
Subsequent Event [Line Items] |  |  |  |
Dividends per share declared on outstanding common stock |  | $ 0.14 | $ 0.14 | $ 0.14
Dividends payable date |  | Mar. 12, 2018 |  |
Dividends payable, shareholders record date |  | Feb. 28, 2018 |  |
Subsequent Event [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Dividend declared date | Apr. 12, 2018 |  |  |
Dividends per share declared on outstanding common stock | $ 0.14 |  |  |
Dividends payable date | May 04, 2018 |  |  |
Dividends payable, shareholders record date | Apr. 27, 2018 |  |  |

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Date the declared dividend will be paid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 Date the dividend to be paid was declared, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format. + References No definition available. + 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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- Details
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