Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2010
Cash flow from operating activities:
Net earnings	$ 205,367	$ 183,575	$ 65,623
Adjustments to reconcile net earnings to cash provided by operations:
Depreciation	229,789	212,324	229,589
Amortization of deferred policy acquisition costs	13,791	9,494	7,569
Change in allowance for losses on trade receivables	(208)	28	(163)
Change in allowance for losses on mortgage notes	0	0	(6)
Change in allowance for inventory reserves	1,382	(674)	1,153
Net gain on sale of real and personal property	(20,888)	(23,058)	(1,960)
Net gain on sale of investments	(5,579)	(1,135)	332
Deferred income taxes	104,360	80,898	15,497
Net change in other operating assets and liabilities:
Reinsurance recoverables and trade receivables	(77,115)	(5,966)	18,112
Inventories	(173)	(6,431)	16,759
Prepaid expenses	15,748	(4,244)	822
Capitalization of deferred policy acquisition costs	(23,166)	(25,239)	(13,934)
Other assets	5,992	28,715	34,626
Related party assets	(24,684)	(87)	2,369
Accounts payable and accrued expenses	19,469	12,547	(3,096)
Policy benefits and losses, claims and loss expenses payable	212,330	109,334	33,371
Other policyholders' funds and liabilities	(1,458)	566	(3,811)
Deferred income	4,367	1,967	396
Related party liabilities	5,281	249	(727)
Net cash provided by operating activities	664,605	572,863	402,521
Purchase of:
Property, plant and equipment	(589,799)	(480,418)	(259,491)
Short term investments	(286,385)	(260,766)	(322,666)
Equity securities	(9,048)	(11,550)	(17,815)
Real estate	(7,829)	(193)	(2,310)
Mortgage loans	(127,163)	(38,558)	(1,501)
Other investments	0	(2,000)	0
Proceeds from sale of:
Property, plant and equipment	168,912	180,411	142,869
Short term investments	300,831	310,195	319,258
Equity securities	10,222	1,198	0
Real estate	440	1,925	771
Mortgage loans	54,840	15,156	6,107
Net cash used by investing activities	(576,962)	(380,988)	(117,978)
Cash flow from financing activities:
Borrowings from credit facilities	237,780	321,862	72,153
Principal repayments on credit facilities	(201,888)	(288,882)	(301,966)
Debt issuance costs	(2,004)	(1,987)	(2,345)
Capital lease payments	(8,328)	(11,522)	(4,057)
Leveraged Employee Stock Ownership Plan - repayments from loan	984	1,172	1,111
Securitization deposits	42,088	(46,031)	0
Preferred stock redemption paid	(144,289)	0	0
Preferred stock dividends paid	(2,913)	(12,412)	(12,856)
Common stock dividends paid	(19,484)	0	0
Contribution to related party	(518)	0	0
Investment contract deposits	13,854	11,580	12,856
Investment contract withdrawals	(28,027)	(34,548)	(48,552)
Net cash used by financing activities	(112,745)	(60,768)	(283,656)
Effects of exchange rate on cash	(294)	271	2,644
Increase (decrease) in cash and cash equivalents	(25,396)	131,378	3,531
Cash and cash equivalents at the beginning of period	375,496	244,118	240,587
Cash and cash equivalents at the end of the period	350,100	375,496	244,118
Fixed maturities investments
Purchase of:
Payments to acquire investments	(220,104)	(215,931)	(149,746)
Proceeds from sale of:
Proceeds from sale of acquired investments	128,486	131,981	163,654
Preferred stock investments
Purchase of:
Payments to acquire investments	(2,717)	(14,352)	(2,185)
Proceeds from sale of:
Proceeds from sale of acquired investments	$ 2,352	$ 1,914	$ 5,077