Quarterly report pursuant to Section 13 or 15(d)

(Loss) earnings per Share of Common Stock - Basic and Diluted Loss Per Share of Common Stock Additional Information (Detail)

v3.10.0.1
(Loss) earnings per Share of Common Stock - Basic and Diluted Loss Per Share of Common Stock Additional Information (Detail) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Senior Common Stock        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Anti-dilutive convertible shares of senior common stock excluded from calculation of diluted earnings per share 744,327 783,236 744,327,000 783,236,000