Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flow from operating activities:
Net earnings	$ 354,664	$ 280,721
Adjustments to reconcile net earnings to cash provided by operations:
Depreciation	192,865	172,617
Amortization of deferred policy acquisition costs	10,421	8,474
Change in allowance for losses on trade receivables	(9)	(219)
Change in allowance for inventory reserves	(603)	(960)
Net gain on sale of real and personal property	(78,805)	(44,500)
Net (gain) loss on sale of investments	(3,022)	(2,788)
Deferred income tax	27,259	23,212
Net change in other operating assets and liabilities:
Reinsurance recoverables and trade receivables	13,618	13,396
Inventories	(2,107)	(1,260)
Prepaid expenses	71,813	14,012
Capitalization of deferred policy acquisition costs	(15,636)	(13,728)
Other assets	18,306	(7,885)
Related party assets	57,767	2,170
Accounts payable and accrued expenses	59,525	36,410
Policy benefits and losses, claims and loss expenses payable	11,702	(3,918)
Other policyholders' funds and liabilities	2,684	1,156
Deferred income	2,339	1,962
Related party liabilities	(97)	375
Net cash provided by operating activities	722,684	479,247
Cash flow from investing activities:
Property, plant and equipment	(720,265)	(599,351)
Short term investments	(249,082)	(130,294)
Fixed maturities investments	(169,899)	(114,112)
Equity securities	(1,315)	(3,707)
Preferred stock	(3)	(3)
Real estate	(23)	(11,312)
Mortgage loans	(86,361)	(21,189)
Proceeds from sale of:
Property, plant and equipment	379,198	260,659
Short term investments	243,634	130,326
Fixed maturities investments	89,085	48,955
Equity securities	$ 808	3,030
Preferred stock		1,000
Real estate		401
Mortgage loans	$ 29,895	18,623
Net cash used by investing activities	(484,328)	(416,974)
Cash flow from financing activities:
Borrowings from credit facilities	461,735	506,792
Principal repayments on credit facilities	(187,958)	(208,101)
Debt issuance costs	(5,957)	(9,847)
Capital lease payments	(77,786)	(40,694)
Employee Stock Ownership Plan	(1,484)	$ (124)
Securitization deposits	298
Common stock dividends paid	(19,594)
Investment contract deposits	150,704	$ 71,571
Investment contract withdrawals	(25,974)	(24,075)
Net cash provided by (used in) financing activities	293,984	295,522
Effects of exchange rate on cash	(12,543)	(3,761)
Increase (decrease) in cash and cash equivalents	519,797	354,034
Cash and cash equivalents at the beginning of period	441,850	495,112
Cash and cash equivalents at the end of the period	$ 961,647	$ 849,146