Aggregate dividends declared during the period for each share of common stock outstanding.

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

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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=6367179&loc=d3e4304-108586

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Date the dividend to be paid was declared, in CCYY-MM-DD format.

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Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Dividends Paid - Additional Information (Detail) - $ / shares			3 Months Ended		9 Months Ended
	Sep. 22, 2015	Jul. 21, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Dividends Payable [Line Items]
Dividends declared per common share			$ 0.20	$ 0.66	$ 0.63	$ 1.26
Dividend Declared
Dividends Payable [Line Items]
Dividends declared per common share	$ 0.10	$ 0.10
Cash dividend, date dividend paid	Nov. 16, 2015	Aug. 17, 2015
Cash dividend, record date	Nov. 02, 2015	Aug. 03, 2015
Cash dividend, declaration date	Sep. 22, 2015	Jul. 21, 2015