Stockholders' Equity - Schedule of Quarterly Cash Dividends to Common Stockholders (Detail)	12 Months Ended
Dec. 31, 2016 $ / shares
Stockholders Equity [Line Items]
Cash dividends declared per share	$ 0.73
Q4 2015 Declaration [Member]
Stockholders Equity [Line Items]
Cash dividends record date	Jan. 15, 2016
Cash dividends payable date	Jan. 22, 2016
Cash dividends declared per share	$ 0.21
Q1 2016 Declaration [Member]
Stockholders Equity [Line Items]
Cash dividends record date	Mar. 14, 2016
Cash dividends payable date	Apr. 01, 2016
Cash dividends declared per share	$ 0.21
Q2 2016 Declaration [Member]
Stockholders Equity [Line Items]
Cash dividends record date	Jun. 20, 2016
Cash dividends payable date	Jul. 01, 2016
Cash dividends declared per share	$ 0.21
Q3 2016 Declaration [Member]
Stockholders Equity [Line Items]
Cash dividends record date	Sep. 29, 2016
Cash dividends payable date	Oct. 07, 2016
Cash dividends declared per share	$ 0.10

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://fasb.org/us-gaap/role/ref/legacyRef
-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://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

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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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