Condensed Consolidated Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Revenues:
Self-moving equipment rentals	$ 487,415	$ 436,207	$ 1,716,424	$ 1,556,787
Self-storage revenues	53,503	46,120	155,623	133,791
Self-moving and self-storage products and service sales	49,081	47,045	191,603	183,115
Property management fees	7,497	7,133	18,970	17,586
Life insurance premiums	39,026	39,198	115,997	119,708
Property and casualty insurance premiums	13,584	12,219	35,665	31,052
Net investment and interest income	20,752	20,887	63,654	59,836
Other revenue	35,497	36,522	133,865	131,636
Total revenues	706,355	645,331	2,431,801	2,233,511
Costs and expenses:
Operating expenses	338,692	322,106	1,085,961	1,002,621
Commission expenses	58,439	50,679	200,939	182,068
Cost of sales	30,751	28,229	112,215	98,331
Benefits and losses	40,084	38,630	120,426	119,255
Amortization of deferred policy acquisition costs	4,722	4,457	13,196	14,197
Lease expense	18,705	24,468	60,950	77,293
Depreciation, net of (gains) losses on disposals	81,810	70,789	209,927	191,431
Total costs and expenses	573,203	539,358	1,803,614	1,685,196
Earnings from operations	133,152	105,973	628,187	548,315
Interest expense	(25,719)	(23,607)	(74,744)	(70,053)
Fees And Amortization On Early Extinguishment Of Debt			(4,081)
Pretax earnings	107,433	82,366	549,362	478,262
Income tax expense	(40,893)	(30,145)	(202,101)	(175,082)
Earnings available to common shareholders	$ 66,540	$ 52,221	$ 347,261	$ 303,180
Basic and diluted earnings per common share	$ 3.40	$ 2.67	$ 17.73	$ 15.50
Weighted average common shares outstanding: basic and diluted	19,590,555	19,563,663	19,584,183	19,554,641