Earnings Per Share - Additional Information (Detail) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Common Stock Equivalents [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the calculations of earnings per share as the effect of including them would have been anti-dilutive	0.3	1.1	0.3
Antidilutive Securities Due to Effect on Period Loss [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the calculations of earnings per share as the effect of including them would have been anti-dilutive	1.5
Series A Preferred Stock | Convertible Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the calculations of earnings per share as the effect of including them would have been anti-dilutive	12.2
Series B Preferred Stock | Convertible Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the calculations of earnings per share as the effect of including them would have been anti-dilutive	39.9