Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flow from operating activities:
Net earnings	$ 250,846	$ 323,648
Adjustments to reconcile net earnings to cash provided by operations:
Depreciation	269,505	233,543
Amortization of deferred policy acquisition costs	12,265	13,931
Amortization of debt issuance costs	1,946	1,765
Interest credited to policyholders	15,119	11,028
Change in allowance for losses on trade receivables	(2)	34
Change in allowance for inventory reserves	2,953	800
Net gain on sale of real and personal property	(9,845)	(28,258)
Net (gain) loss on sale of investments	(3,059)	(4,645)
Deferred income tax	63,065	114,724
Net change in other operating assets and liabilities:
Reinsurance recoverables and trade receivables	(15,895)	(8,102)
Inventories	(21,036)	(2,674)
Prepaid expenses	41,486	46,248
Capitalization of deferred policy acquisition costs	(15,154)	(14,360)
Other assets	16,615	(8,695)
Related party assets	8,958	5,195
Accounts payable and accrued expenses	69,550	45,162
Policy benefits and losses, claims and loss expenses payable	12,057	16,922
Other policyholders' funds and liabilities	10,305	1,563
Deferred income	3,660	5,034
Related party liabilities	(3,662)	232
Net cash provided by operating activities	709,677	753,095
Cash flow from investing activities:
Property, plant and equipment	(754,052)	(761,277)
Short term investments	(34,765)	(409,925)
Fixed maturities investments	(219,620)	(168,817)
Equity securities	(662)	(489)
Preferred stock	(1,000)
Real estate	(118)	(15,788)
Mortgage loans	(50,817)	(136,682)
Proceeds from sale of:
Property, plant and equipment	259,450	310,409
Short term investments	38,927	386,508
Fixed maturities investments	70,792	120,525
Equity securities
Preferred stock	988	2,651
Real estate	2,664	831
Mortgage loans	9,584	105,731
Net cash used by investing activities	(678,629)	(566,323)
Cash flow from financing activities:
Borrowings from credit facilities	285,532	331,787
Principal repayments on credit facilities	(214,354)	(158,479)
Debt issuance costs	(3,413)	(2,085)
Capital lease payments	(150,302)	(83,414)
Employee Stock Ownership Plan	(3,960)	(4,653)
Securitization deposits	(186)	245
Common stock dividends paid	(19,587)	(19,586)
Investment contract deposits	232,752	130,166
Investment contract withdrawals	(97,262)	(49,555)
Net cash provided by (used in) financing activities	29,220	144,426
Effects of exchange rate on cash	10,277	(10,517)
Increase (decrease) in cash and cash equivalents	70,545	320,681
Cash and cash equivalents at the beginning of period	697,806	600,646
Cash and cash equivalents at the end of the period	$ 768,351	$ 921,327