Condensed Consolidated Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenues:
Self-moving equipment rentals	$ 653,534	$ 598,931	$ 1,229,009	$ 1,120,580
Self-storage revenues	52,986	45,572	102,120	87,671
Self-moving and self-storage products and service sales	68,043	65,379	142,522	136,070
Property management fees	5,796	5,292	11,473	10,453
Life insurance premiums	39,041	39,448	76,971	80,510
Property and casualty insurance premiums	12,463	10,867	22,081	18,833
Net investment and interest income	21,856	19,960	42,902	38,949
Other revenue	52,772	53,774	98,368	95,114
Total revenues	906,491	839,223	1,725,446	1,588,180
Costs and expenses:
Operating expenses	383,970	361,551	747,269	680,515
Commission expenses	76,160	70,099	142,500	131,389
Cost of sales	39,836	34,532	81,464	70,102
Benefits and losses	39,558	37,992	80,342	80,625
Amortization of deferred policy acquisition costs	4,290	6,057	8,474	9,740
Lease expense	19,775	25,818	42,245	52,825
Depreciation, net of (gains) losses on disposals	67,066	63,208	128,117	120,642
Total costs and expenses	630,655	599,257	1,230,411	1,145,838
Earnings from operations	275,836	239,966	495,035	442,342
Interest expense	(24,877)	(23,118)	(49,025)	(46,446)
Fees And Amortization On Early Extinguishment Of Debt	(4,081)		(4,081)
Pretax earnings	246,878	216,848	441,929	395,896
Income tax expense	(90,631)	(78,857)	(161,208)	(144,937)
Earnings available to common shareholders	$ 156,247	$ 137,991	$ 280,721	$ 250,959
Basic and diluted earnings per common share	$ 7.98	$ 7.06	$ 14.34	$ 12.84
Weighted average common shares outstanding: basic and diluted	19,584,194	19,554,633	19,580,997	19,550,128