Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash flow from operating activities:
Net earnings	$ 280,721	$ 250,959
Adjustments to reconcile net earnings to cash provided by operations:
Depreciation	172,617	141,518
Amortization of deferred policy acquisition costs	8,474	9,740
Change in allowance for losses on trade receivables	(219)	(6)
Change in allowance for inventory reserves	(960)	716
Net gain on sale of real and personal property	(44,500)	(20,876)
Net (gain) loss on sale of investments	(2,788)	(4,060)
Deferred income tax	23,212	63,947
Net change in other operating assets and liabilities:
Reinsurance recoverables and trade receivables	13,396	24,561
Inventories	(1,260)	(5,750)
Prepaid expenses	14,012	2,323
Capitalization of deferred policy acquisition costs	(13,728)	(16,289)
Other assets	(7,885)	(4,370)
Related party assets	2,170	8,650
Accounts payable and accrued expenses	35,919	24,866
Policy benefits and losses, claims and loss expenses payable	(3,918)	309
Other policyholders' funds and liabilities	1,356	494
Deferred income	1,962	2,191
Related party liabilities	375	4,475
Net cash provided by operating activities	478,956	483,398
Purchase of:
Property, plant and equipment	(599,351)	(457,671)
Short term investments	(130,294)	(154,703)
Fixed maturities investments	(114,112)	(174,593)
Equity securities	(3,707)	(388)
Preferred stock	(3)	(635)
Real estate	(11,312)	(252)
Mortgage loans	(21,189)	(14,260)
Proceeds from sale of:
Property, plant and equipment	260,659	176,453
Short term investments	130,326	162,580
Fixed maturities investments	48,955	93,050
Equity securities	3,030	6,803
Preferred stock	1,000	6,004
Real estate	401
Mortgage loans	18,623	36,415
Net cash used by investing activities	(416,974)	(321,197)
Cash flow from financing activities:
Borrowings from credit facilities	506,792	138,041
Principal repayments on credit facilities	(208,101)	(122,945)
Debt issuance costs	(9,847)	(233)
Capital lease payments	(40,694)	(21,425)
Leveraged Employee Stock Ownership Plan - repayments from loan	167	260
Investment contract deposits	71,571	74,253
Investment contract withdrawals	(24,075)	(14,721)
Net cash provided by financing activities	295,813	53,230
Effects of exchange rate on cash	(3,761)	401
Increase (decrease) in cash and cash equivalents	354,034	215,832
Cash and cash equivalents at the beginning of period	495,112	463,744
Cash and cash equivalents at the end of the period	$ 849,146	$ 679,576