Earnings per Share and Dividends per Share - Additional Information (Detail) - $ / shares	Jun. 13, 2016	Mar. 07, 2016	Dec. 09, 2015
Earnings Per Share [Abstract]
Dividend paid	$ 0.08	$ 0.08	$ 0.06
Date of record	May 19, 2016	Feb. 12, 2016	Nov. 16, 2016

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

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

Name:	us-gaap_DividendsPayableAmountPerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant