Net Investment and Interest Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Net Investment Income [Line Items]
Investment income	$ 68,801	$ 70,521	$ 50,095
Less: investment expenses	(1,629)	(1,375)	(1,338)
Investment income, related party	12,419	13,757	24,795
Net investment and interest income	79,591	82,903	73,552
Fixed Maturities [Member]
Net Investment Income [Line Items]
Investment income	53,634	50,696	41,439
Real Estate [Member]
Net Investment Income [Line Items]
Investment income	1,118	380	81
Insurance policy loans [Member]
Net Investment Income [Line Items]
Investment income	1,159	1,126	489
Mortgage loans [Member]
Net Investment Income [Line Items]
Investment income	9,450	17,952	7,002
Short-term, amounts held by ceding reinsurers, net and other investments [Member]
Net Investment Income [Line Items]
Investment income	$ 3,440	$ 367	$ 1,084