Stockholders Equity [Line Items]

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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

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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=6367179&loc=d3e4304-108586

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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.

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Stockholders' Equity - Schedule of Quarterly Cash Dividends to Common Stockholders (Detail) - $ / shares					1 Months Ended						12 Months Ended
	Sep. 16, 2015	Jun. 10, 2015	Mar. 03, 2015	Jan. 05, 2015	Sep. 30, 2014	May. 31, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Stockholders Equity [Line Items]
Cash dividends record date	Sep. 29, 2015	Jun. 22, 2015	Mar. 13, 2015	Jan. 13, 2015
Cash dividends payable date	Oct. 06, 2015	Jul. 01, 2015	Apr. 01, 2015	Jan. 22, 2015
Cash dividends declared per share	$ 0.21	$ 0.21	$ 0.21	$ 0.21							$ 0.84	$ 0.62	$ 0.60
Q4 2014 Declaration [Member]
Stockholders Equity [Line Items]
Cash dividends record date											Jan. 13, 2015
Cash dividends payable date											Jan. 22, 2015
Cash dividends declared per share											$ 0.21
Q1 2015 Declaration [Member]
Stockholders Equity [Line Items]
Cash dividends record date											Mar. 13, 2015
Cash dividends payable date											Apr. 01, 2015
Cash dividends declared per share											$ 0.21
Q2 2015 Declaration [Member]
Stockholders Equity [Line Items]
Cash dividends record date											Jun. 22, 2015
Cash dividends payable date											Jul. 01, 2015
Cash dividends declared per share											$ 0.21
Q3 2015 Declaration [Member]
Stockholders Equity [Line Items]
Cash dividends record date											Sep. 29, 2015
Cash dividends payable date											Oct. 06, 2015
Cash dividends declared per share											$ 0.21
Q1 2014 Declaration [Member]
Stockholders Equity [Line Items]
Cash dividends record date											Mar. 20, 2014	Mar. 20, 2014
Cash dividends payable date											Apr. 01, 2014	Apr. 01, 2014
Cash dividends declared per share							$ 0.20					$ 0.20
Q2 2014 Declaration [Member]
Stockholders Equity [Line Items]
Cash dividends record date											Jun. 20, 2014	Jun. 20, 2014
Cash dividends payable date											Jul. 01, 2014	Jul. 01, 2014
Cash dividends declared per share						$ 0.21						$ 0.21
Q3 2014 Declaration [Member]
Stockholders Equity [Line Items]
Cash dividends record date											Sep. 29, 2014	Sep. 29, 2014
Cash dividends payable date											Oct. 06, 2014	Oct. 06, 2014
Cash dividends declared per share					$ 0.21							$ 0.21
Q2 2013 Declaration [Member]
Stockholders Equity [Line Items]
Cash dividends record date											Jun. 20, 2013		Jun. 20, 2013
Cash dividends payable date											Jul. 01, 2013		Jul. 01, 2013
Cash dividends declared per share										$ 0.20			$ 0.20
Q3 2013 Declaration [Member]
Stockholders Equity [Line Items]
Cash dividends record date											Sep. 20, 2013		Sep. 20, 2013
Cash dividends payable date											Oct. 01, 2013		Oct. 01, 2013
Cash dividends declared per share									$ 0.20				$ 0.20
Q4 2013 Declaration [Member]
Stockholders Equity [Line Items]
Cash dividends record date											Dec. 20, 2013		Dec. 20, 2013
Cash dividends payable date											Jan. 03, 2014		Jan. 03, 2014
Cash dividends declared per share								$ 0.20					$ 0.20