Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Mar. 31, 2014
Current Assets -
Cash and Cash Equivalents	$ 11,063	$ 6,482
Accounts and Notes Receivable	132,823	102,917
Inventories	190,711	187,096
Prepaid and Other Assets	6,309	10,465
Total Current Assets	340,906	306,960
Property, Plant and Equipment -	1,698,495	1,660,975
Less: Accumulated Depreciation	(708,311)	(676,924)
Property, Plant and Equipment, net	990,184	984,051
Notes Receivable	2,966	3,063
Investment in Joint Venture	45,489	43,008
Goodwill and Intangible Assets	159,835	160,690
Other Assets	15,007	13,757
Total Assets	1,554,387	1,511,529
Current Liabilities -
Accounts Payable	66,953	57,098
Accrued Liabilities	47,845	41,520
Income Taxes Payable	8,610	702
Current Portion of Long-term Debt	9,500	9,500
Total Current Liabilities	132,908	108,820
Long-term Debt	302,759	371,759
Other Long-term Liabilities	54,070	53,678
Deferred Income Taxes	142,259	145,773
Total Liabilities	631,996	680,030
Stockholders’ Equity -
Preferred Stock, Par Value $0.01; Authorized 5,000,000 Shares; None Issued
Common Stock, Par Value $0.01; Authorized 100,000,000 Shares; Issued and Outstanding 50,265,957 and 50,053,738 Shares, respectively	503	501
Capital in Excess of Par Value	266,212	253,524
Accumulated Other Comprehensive Losses	(5,271)	(5,483)
Retained Earnings	660,947	582,957
Total Stockholders’ Equity	922,391	831,499
Liabilities and Stockholders' Equity, Total	$ 1,554,387	$ 1,511,529