Consolidated Statements of Changes In Stockholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Common Stock, $0.25 Par Value	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	FY 2010 - $2.13 per share preferred	FY 2011 - $2.13 per share preferred	FY 2012 - $0.53 per share preferred	FY 2012 - $1.00 per share common	Less: Treasury Common Stock	Less: Treasury Preferred Stock	Less: Unearned Employee Stock Ownership Plan Shares
Balance at Mar. 31, 2009	$ 717,629	$ 10,497	$ 420,588	$ (98,000)	$ 915,862					$ (525,653)		$ (5,665)
Consolidated statement of change in equity
Increase in market value of released ESOP shares	1,336		1,336
Release of unearned ESOP shares	1,111											1,111
Foreign currency translation	14,471			14,471
Unrealized gain (loss) on investments, net of tax	13,254			13,254
Fair market value of cash flow hedges, net of tax	14,478			14,478
Adjustment of postretirement benefit obligation	(410)			(410)
Net earnings	65,623				65,623
Less: Excess of redemption value over carrying value of preferred shares redeemed	388				388
Preferred stock dividends paid	(12,856)					(12,856)
Redemption of preferred shares	(2,185)										(2,185)
Contribution from related party	72		72
Net activity	95,282		1,408	41,793	53,155						(2,185)	1,111
Balance at Mar. 31, 2010	812,911	10,497	421,996	(56,207)	969,017					(525,653)	(2,185)	(4,554)
Consolidated statement of change in equity
Increase in market value of released ESOP shares	3,038		3,038
Release of unearned ESOP shares	1,172											1,172
Foreign currency translation	3,114			3,114
Unrealized gain (loss) on investments, net of tax	4,930			4,930
Fair market value of cash flow hedges, net of tax	1,495			1,495
Adjustment of postretirement benefit obligation	201			201
Net earnings	183,575				183,575
Less: Excess of redemption value over carrying value of preferred shares redeemed	(178)				(178)
Preferred stock dividends paid	(12,412)						(12,412)
Redemption of preferred shares	(5,004)										(5,004)
Contribution from related party	178		178
Net activity	180,109		3,216	9,740	170,985						(5,004)	1,172
Balance at Mar. 31, 2011	993,020	10,497	425,212	(46,467)	1,140,002					(525,653)	(7,189)	(3,382)
Consolidated statement of change in equity
Increase in market value of released ESOP shares	3,141		3,141
Release of unearned ESOP shares	984											984
Foreign currency translation	(2,854)			(2,854)
Unrealized gain (loss) on investments, net of tax	10,005			10,005
Fair market value of cash flow hedges, net of tax	(5,691)			(5,691)
Adjustment of postretirement benefit obligation	(429)			(429)
Net earnings	205,367				205,367
Less: Excess of redemption value over carrying value of preferred shares redeemed	(5,908)				(5,908)
Preferred stock dividends paid	(2,913)							(2,913)
Common stock dividends paid	(19,484)								(19,484)
Redemption of preferred shares	(144,808)										(144,808)
Contribution from related party	5,390		5,390
Net activity	42,800		8,531	1,031	177,062						(144,808)	984
Balance at Mar. 31, 2012	$ 1,035,820	$ 10,497	$ 433,743	$ (45,436)	$ 1,317,064					$ (525,653)	$ (151,997)	$ (2,398)