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Insurance Activity - Schedule of Premiums Assumed and Earned (Detail) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended 12 Months Ended 3 Months Ended
Dec. 31, 2012
Dec. 31, 2014
Dec. 31, 2013
Mar. 19, 2012
Successor [Member]        
Effects of Reinsurance [Line Items]        
Premiums assumed $ 14,210us-gaap_PremiumsWrittenNet
/ us-gaap_StatementScenarioAxis
= us-gaap_SuccessorMember		 $ 6,869us-gaap_PremiumsWrittenNet
/ us-gaap_StatementScenarioAxis
= us-gaap_SuccessorMember		 $ 12,115us-gaap_PremiumsWrittenNet
/ us-gaap_StatementScenarioAxis
= us-gaap_SuccessorMember		  
Change in unearned premiums 184us-gaap_IncreaseDecreaseInUnearnedPremiums
/ us-gaap_StatementScenarioAxis
= us-gaap_SuccessorMember		 300us-gaap_IncreaseDecreaseInUnearnedPremiums
/ us-gaap_StatementScenarioAxis
= us-gaap_SuccessorMember		 (1,169)us-gaap_IncreaseDecreaseInUnearnedPremiums
/ us-gaap_StatementScenarioAxis
= us-gaap_SuccessorMember		  
Premiums earned 14,394us-gaap_PremiumsEarnedNet
/ us-gaap_StatementScenarioAxis
= us-gaap_SuccessorMember		 7,169us-gaap_PremiumsEarnedNet
/ us-gaap_StatementScenarioAxis
= us-gaap_SuccessorMember		 10,946us-gaap_PremiumsEarnedNet
/ us-gaap_StatementScenarioAxis
= us-gaap_SuccessorMember		  
Predecessor [Member]        
Effects of Reinsurance [Line Items]        
Premiums assumed       6,130us-gaap_PremiumsWrittenNet
/ us-gaap_StatementScenarioAxis
= us-gaap_PredecessorMember
Change in unearned premiums       47us-gaap_IncreaseDecreaseInUnearnedPremiums
/ us-gaap_StatementScenarioAxis
= us-gaap_PredecessorMember
Premiums earned       $ 6,177us-gaap_PremiumsEarnedNet
/ us-gaap_StatementScenarioAxis
= us-gaap_PredecessorMember