Insurance Activity - Summary of Losses and Loss Adjustment Reserve Activity (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 Successor [Member]	Dec. 31, 2011 Predecessor [Member]	Dec. 31, 2010 Predecessor [Member]
Balance at beginning of period	$ 142,119	$ 190,036	$ 256,426
Incurred-prior periods	30,111	47,321	60,078
Paid or terminated-prior periods	(89,706)	(95,238)	(126,468)
Total	$ 82,524	$ 142,119	$ 190,036