Net Investment and Interest Income (Table Text Block)	12 Months Ended
	Mar. 31, 2020
Table Text Block [Abstract]
Net Investment and Interest Income	Years Ended March 31,     2020   2019   2018     (In thousands) Fixed maturities $ 107,434 $ 99,348 $ 84,476 Real estate   7,304   5,538   5,344 Insurance policy loans   974   1,305   1,212 Mortgage loans   17,164   16,674   17,783 Short-term, amounts held by ceding reinsurers, net and other investments   9,807   (7,429)   3,098 Investment income   142,683   115,436   111,913 Less: investment expenses   (4,854)   (4,502)   (4,766) Investment income - related party, net eliminations   –   –   3,326 Net investment and interest income $ 137,829 $ 110,934 $ 110,473