Net Income (Loss) Per Common Share - Additional Information (Detail) (USD $)	0 Months Ended	9 Months Ended
Aug. 06, 2014	May 07, 2014	Feb. 12, 2014	Sep. 30, 2014
Earnings Per Share [Abstract]
Cash dividend paid per common share				$ 0.10
Cash dividend declared per common share	$ 0.10	$ 0.10	$ 0.10	$ 0.10

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 2: 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

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration