Schedule of Premiums Assumed and Earned (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended				9 Months Ended
	Sep. 30, 2012 Successor [Member]		Sep. 30, 2012 Successor [Member]		Mar. 19, 2012 Predecessor [Member]		Sep. 30, 2011 Predecessor [Member]		Sep. 30, 2011 Predecessor [Member]
Premiums assumed	$ 4,149		$ 10,385		$ 6,130		$ 8,653		$ 26,591
Change in unearned premiums	45		96		47		48		166
Premiums earned	$ 4,194	[1]	$ 10,481	[1]	$ 6,177	[1]	$ 8,701	[1]	$ 26,757	[1]

[1] Please refer to Note 3 and Note 4 for explanation of "Successor" and "Predecessor" Presentation.