Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Cash flow from operating activities:
Net earnings	$ 179,962	$ 170,329
Adjustments to reconcile net earnings to cash provided by operations:
Depreciation	167,022	158,525
Amortization of deferred policy acquisition costs	10,716	6,549
Change in allowance for losses on trade receivables	(89)	26
Change in allowance for inventory reserves	3,005	1,271
Net gain on sale of real and personal property	(18,326)	(18,964)
Net gain on sale of investments	(5,454)	(1,546)
Deferred income taxes	94,581	59,628
Net change in other operating assets and liabilities:
Reinsurance recoverables and trade receivables	(146,365)	(34,547)
Inventories	173	(8,809)
Prepaid expenses	2,666	9,784
Capitalization of deferred policy acquisition costs	(19,072)	(20,584)
Other assets	3,623	40,239
Related party assets	(7,362)	1,136
Accounts payable and accrued expenses	7,428	14,687
Policy benefits and losses, claims and loss expenses payable	221,750	84,779
Other policyholders' funds and liabilities	(3,345)	804
Deferred income	1,070	903
Related party liabilities	(267)	219
Net cash provided by operating activities	491,716	464,429
Purchase of:
Property, plant and equipment	(421,743)	(337,510)
Short term investments	(167,308)	(172,451)
Real estate	(5,201)	(145)
Mortgage loans	(94,111)	(20,992)
Proceeds from sale of:
Property, plant and equipment	139,852	149,351
Short term investments	186,893	213,172
Equity securities	10,210	1,198
Real estate	146	190
Mortgage loans	40,883	8,797
Net cash used by investing activities	(377,758)	(239,255)
Cash flow from financing activities:
Borrowings from credit facilities	239,799	306,687
Principal repayments on credit facilities	(166,615)	(248,884)
Debt issuance costs	(1,788)	(1,987)
Capital lease payments	(5,962)	(9,852)
Leveraged Employee Stock Ownership Plan - repayments from loan	827	881
Securitization deposits	40,500	(87,719)
Preferred stock redemption paid	(144,289)	0
Preferred stock dividends paid	(2,913)	(9,336)
Dividend from related party	0	3,303
Contribution to related party	(518)	0
Investment contract deposits	10,567	8,503
Investment contract withdrawals	(20,479)	(25,749)
Net cash used by financing activities	(50,871)	(64,153)
Effects of exchange rate on cash	(306)	179
Increase (decrease) in cash and cash equivalents	62,781	161,200
Cash and cash equivalents at the beginning of period	375,496	244,118
Cash and cash equivalents at the end of the period	438,277	405,318
Fixed maturities investments
Purchase of:
Payments to acquire investments	(174,575)	(155,242)
Proceeds from sale of:
Proceeds from sale of acquired investments	116,609	97,015
Equity security investments
Purchase of:
Payments to acquire investments	(9,048)	(11,247)
Preferred stock investments
Purchase of:
Payments to acquire investments	(1,617)	(11,391)
Proceeds from sale of:
Proceeds from sale of acquired investments	$ 1,252	$ 0