Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Feb. 29, 2016	Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2013
Income Taxes [Line Items]
Surrendered certain of its corporate-owned life insurance policies, increase in tax expense		$ 28,279
Benefit of dual consolidated losses		13,268
Valuation allowance	$ 731	4,244	$ (12,606)
Tax on unrealized investment gains (losses) accounted for in other comprehensive income	12,725
Valuation allowance	25,764	23,482
Deferred tax asset related to foreign tax credit carryforwards	1,718	1,227
Undistributed earnings of international subsidiaries	21,043
Unrecognized tax benefits	17,112	20,814	19,011	$ 21,659
Effect on income tax expense if unrecognized tax benefits are recognized	15,411	18,597
Decrease in unrecognized tax benefits	1,404
Interest and penalties on unrecognized tax benefits and refundable income taxes	1,053	1,281
Accrued Interest and penalties on unrecognized tax benefit	1,526	2,580
Income taxes paid from continuing operation	44,688	$ 59,758	$ 18,637
International [Member]
Income Taxes [Line Items]
Deferred tax asset relating to operating loss carryforward	5,525
Deferred tax asset relating to operating loss carryforward, subject to expiration date	354
Deferred tax asset relating to operating loss carryforward, no expiration date	5,171
Subject to expiration date range 2020 through 2028 [Member]
Income Taxes [Line Items]
Deferred tax asset related to domestic net operating loss	12,470
Subject to expiration date range 2016 to 2036 [Member]
Income Taxes [Line Items]
Deferred tax asset related to state net operating loss	4,934
Subject to expiration date range 2019 through 2022 [Member]
Income Taxes [Line Items]
Deferred tax asset related to foreign tax credit carryforwards	8,673
Income Tax Provision [Member]
Income Taxes [Line Items]
Valuation allowance, increase (decrease) in amount	(550)
Other Comprehensive Income [Member]
Income Taxes [Line Items]
Valuation allowance, increase (decrease) in amount	$ 2,832