Income (Loss) Per Common Share (Basic And Diluted (Loss) Income Per Common Share) (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 1 Months Ended 3 Months Ended 10 Months Ended 12 Months Ended 10 Months Ended 2 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Mar. 31, 2012
Successor [Member]
Dec. 31, 2012
Successor [Member]
Sep. 30, 2012
Successor [Member]
Jun. 30, 2012
Successor [Member]
Dec. 31, 2012
Successor [Member]
Dec. 31, 2013
Successor [Member]
Dec. 31, 2012
Successor [Member]
Preferred Stock [Member]
Dec. 31, 2012
Successor [Member]
Vested Stock Options [Member]
Dec. 31, 2012
Successor [Member]
Unvested Stock Options [Member]
Dec. 31, 2012
Successor [Member]
Warrants [Member]
Feb. 24, 2012
Predecessor [Member]
Dec. 31, 2011
Predecessor [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]                                
Basic weighted average number of shares outstanding                 12,489,435 24,736,841         1,000 1,000
Effect of dilutive securities:                                
Preferred shares, stock options, and warrants                    [1] 1,059,356 [1]            
Diluted average shares outstanding (in shares)                 12,489,435 25,796,197         1,000 1,000
Net (loss) income available to common stockholders $ 116,724 $ 7,562 $ 6,850 $ (3,522) $ (5,351) $ (2,194) $ (1,507) $ (2,550) $ (11,602) $ 127,604         $ 228,383 $ (193,330)
Basic income (loss) per common share (in dollars per share)                 $ (0.93) $ 5.16         $ 228,383.00 $ (193,330.00)
Dilutive income (loss) per common share (in dollars per share)                 $ (0.93) $ 4.95         $ 228,383.00 $ (193,330.00)
Antidilutive securities not included in the calculation of diluted loss per common share (weighted average):                                
Preferred shares                     8,242,731 384,428 192,214 1,907,551    
[1] For periods with a net loss, all potentially dilutive shares related to the preferred shares, options to acquire common stock, and warrants were excluded from the diluted loss per common share calculations because the effect of their inclusion would be antidilutive, or would decrease the reported loss per common share.