Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Current Assets -
Cash and Cash Equivalents	$ 9,315	$ 6,561
Restricted Cash	38,753
Accounts and Notes Receivable, net	141,685	136,313
Inventories	258,159	252,846
Income Tax Receivable	5,750
Prepaid and Other Assets	5,073	4,904
Total Current Assets	458,735	400,624
Property, Plant, and Equipment -	2,586,528	2,439,438
Less: Accumulated Depreciation	(991,229)	(892,601)
Property, Plant, and Equipment, net	1,595,299	1,546,837
Notes Receivable	115	815
Investment in Joint Venture	60,558	48,620
Goodwill and Intangible Assets, net	239,342	235,505
Other Assets	13,954	14,723
Total Assets	2,368,003	2,247,124
Current Liabilities -
Accounts Payable	73,459	92,193
Accrued Liabilities	105,870	55,379
Income Tax Payable		733
Current Portion of Long-term Debt		81,214
Total Current Liabilities	179,329	229,519
Long-term Debt	620,922	605,253
Other Long-term Liabilities	31,096	42,878
Deferred Income Taxes	118,966	166,024
Total Liabilities	950,313	1,043,674
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 48,282,784 and 48,453,268 Shares, respectively.	483	485
Capital in Excess of Par Value	122,379	149,014
Accumulated Other Comprehensive Losses	(4,012)	(7,396)
Retained Earnings	1,298,840	1,061,347
Total Stockholders’ Equity	1,417,690	1,203,450
Liabilities and Stockholders' Equity, Total	$ 2,368,003	$ 2,247,124

The aggregate of amounts due from customers or clients, within one year of the balance sheet date (or one operating cycle, if longer), for goods or services that have been delivered or sold in the normal course of business and an amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date within one year of the balance sheet, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection and net of any write-downs taken for collection uncertainty on the part of the holder, respectively.

Name:	us-gaap_AccountsNotesAndLoansReceivableNetCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).