Statutory Financial Information of Insurance Subsidiaries (Net income (loss) Capital and Surplus (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Repwest [Member]
Statutory financial information of insurance subsidiaries:
Audit statutory net income (loss)	$ 22,308	$ 21,287	$ 18,286
Audited statutory capital and surplus	158,376	155,835	126,836
ARCOA [Member]
Statutory financial information of insurance subsidiaries:
Audit statutory net income (loss)	1,391	1,358	532
Audited statutory capital and surplus	5,386	4,175	2,666
Oxford [Member]
Statutory financial information of insurance subsidiaries:
Audit statutory net income (loss)	12,150	12,115	11,130
Audited statutory capital and surplus	172,282	158,512	148,486
CFLIC [Member]
Statutory financial information of insurance subsidiaries:
Audit statutory net income (loss)	9,217	9,157	9,567
Audited statutory capital and surplus	28,892	28,551	28,848
NAI [Member]
Statutory financial information of insurance subsidiaries:
Audit statutory net income (loss)	1,161	886	(419)
Audited statutory capital and surplus	$ 12,685	$ 11,589	$ 10,185