Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Mar. 31, 2012
Current Assets
Cash	$ 66,606	$ 44,663
Trade receivables, less allowances for doubtful accounts of $38,505 and $31,845 at December 31, 2012 and March 31, 2012, respectively	645,174	652,439
Inventories, net	462,379	408,438
Deferred income tax asset, net	53,898	49,617
Prepaid expenses and other current assets	160,900	119,049
Total current assets	1,388,957	1,274,206
Plant and equipment at cost	4,523,456	4,306,420
Less accumulated depreciation	(1,849,198)	(1,690,361)
Plant and equipment, net	2,674,258	2,616,059
Goodwill	1,198,698	1,163,803
Other intangible assets, net	230,469	214,204
Other non-current assets	46,679	52,313
Total assets	5,539,061	5,320,585
Current Liabilities
Accounts payable, trade	157,384	174,868
Accrued expenses and other current liabilities	347,724	356,344
Short-term debt	284,305	388,452
Current portion of long-term debt	305,342	10,385
Total current liabilities	1,094,755	930,049
Long-term debt, excluding current portion	1,706,926	1,761,902
Deferred income tax liability, net	811,547	793,957
Other non-current liabilities	88,087	84,419
Commitments and contingencies
Stockholders' Equity
Preferred stock, 20,030 shares authorized, no shares issued or outstanding at December 31, 2012 and March 31, 2012	0	0
Common stock, par value $0.01 per share, 200,000 shares authorized, 87,074 and 86,874 shares issued at December 31, 2012 and March 31, 2012, respectively	871	869
Capital in excess of par value	718,426	649,551
Retained earnings	1,811,421	1,701,478
Accumulated other comprehensive income	5,991	5,386
Treasury stock, 10,514 and 10,207 shares at cost at December 31, 2012 and March 31, 2012, respectively	(698,963)	(607,026)
Total stockholders' equity	1,837,746	1,750,258
Total liabilities and stockholders' equity	$ 5,539,061	$ 5,320,585