Statutory Financial Information of Insurance Subsidiaries (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Repwest [Member]
Statutory financial information of insurance subsidiaries:
Audit statutory net income (loss)	$ 21,287	$ 18,286	$ 16,923
Audited statutory capital and surplus	155,835	126,836	94,284
ARCOA [Member]
Statutory financial information of insurance subsidiaries:
Audit statutory net income (loss)	1,358	532	(1,881)
Audited statutory capital and surplus	4,175	2,666	2,201
Oxford [Member]
Statutory financial information of insurance subsidiaries:
Audit statutory net income (loss)	12,115	11,130	13,936
Audited statutory capital and surplus	158,512	148,486	131,920
CFLIC [Member]
Statutory financial information of insurance subsidiaries:
Audit statutory net income (loss)	9,157	9,567	8,734
Audited statutory capital and surplus	28,551	28,848	28,042
NAI [Member]
Statutory financial information of insurance subsidiaries:
Audit statutory net income (loss)	886	(419)	(1,962)
Audited statutory capital and surplus	$ 11,589	$ 10,185	$ 9,804