Quarterly report pursuant to Section 13 or 15(d)

Earnings (Loss) Per Share of Common Stock - Basic and Diluted Earnings (Loss) Per Share of Common Stock (Parenthetical) (Detail)

v2.4.0.8
Earnings (Loss) Per Share of Common Stock - Basic and Diluted Earnings (Loss) Per Share of Common Stock (Parenthetical) (Detail)
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Earnings Per Share [Abstract]      
Anti-dilutive convertible senior common shares excluded from calculation of diluted earnings per share 195,759 332,608 180,753