Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Cash flow from operating activities:
Net earnings	$ 226,835	$ 179,962
Earnings from consolidated entities	0	0
Adjustments to reconcile net earnings to cash provided by operations:
Depreciation	192,357	167,022
Amortization of deferred policy acquisition costs	9,290	10,716
Change in allowance for losses on trade receivables	(73)	(89)
Change in allowance for inventory reserves	2,050	3,005
Net of gains on sale of real and personal property	(14,879)	(18,326)
Net (gain) loss on sale of investments	(1,050)	(5,454)
Deferred income taxes	17,757	94,581
Net change in other operating assets and liabilities:
Reinsurance recoverables and trade receivables	71,709	(145,727)
Inventories	696	173
Prepaid expenses	(13,283)	2,666
Capitalization of deferred policy acquisition costs	(43,085)	(19,072)
Other assets	22,712	3,623
Related party assets	138,042	(5,357)
Accounts payable and accrued expenses	(872)	7,428
Policy benefits and losses, claims and loss expenses payable	(30,226)	221,797
Other policyholders' funds and liabilities	(925)	(3,333)
Deferred income	(3,704)	1,070
Related party liabilities	2,970	2,965
Net cash provided by operating activities	576,321	497,650
Purchase of:
Property, plant and equipment	(422,840)	(421,743)
Short term investments	(289,773)	(169,313)
Fixed maturities investments	(308,290)	(172,570)
Equity securities	(3,130)	(9,048)
Preferred stock	(2,761)	(1,617)
Real estate	(1,053)	(5,201)
Mortgage loans	(50,583)	(94,111)
Proceeds from sale of:
Property, plant and equipment	166,904	139,852
Short term investments	280,856	186,941
Fixed maturities investments	85,132	116,609
Equity securities	0	10,210
Preferred stock	5,728	1,252
Real estate	671	146
Mortgage loans	49,215	40,883
Net cash used by investing activities	(489,924)	(377,710)
Cash flow from financing activities:
Borrowings from credit facilities	251,319	234,562
Principal repayments on credit facilities	(234,698)	(166,615)
Debt issuance costs	(2,352)	(1,788)
Capital lease payments	(18,310)	(5,962)
Leveraged Employee Stock Ownership Plan - repayments from loan	559	827
Securitization deposits	(1,729)	40,500
Proceeds from (repayment of) intercompany loans	0	0
Preferred stock redemption paid	0	(144,289)
Preferred stock dividends paid	0	(2,913)
Common stock dividends paid	(97,421)	0
Contribution to related party	0	(518)
Investment contract deposits	268,478	10,810
Investment contract withdrawals	(22,937)	(21,419)
Net cash used by financing activities	142,909	(56,805)
Effects of exchange rate on cash	(362)	(306)
Increase (decrease) in cash and cash equivalents	228,944	62,829
Cash and cash equivalents at the end of period	357,180	382,514
Cash and cash equivalents at the end of the period	$ 586,124	$ 445,343