CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 29,352	$ 55,432
Accounts and other receivables – net	162,910	196,003
Inventories – net	124,635	129,208
Other current assets	5,690	7,130
Total current assets	322,587	387,773
Property, plant and equipment – net	615,498	612,612
Goodwill	15,005	15,005
Other assets	37,391	34,884
Total assets	990,481	1,050,274
Current liabilities:
Accounts payable	195,699	227,711
Accrued liabilities	25,382	35,013
Income taxes payable	817	1
Deferred income and customer advances	17,126	17,194
Line of credit – short-term	37,600	0
Current portion of long-term debt	0	16,875
Total current liabilities	276,624	296,794
Deferred income taxes	94,017	92,276
Line of credit – long-term	192,400	0
Long-term debt	0	248,339
Postretirement benefit obligations	33,629	33,396
Other liabilities	3,983	3,144
Total liabilities	600,653	673,949
COMMITMENTS AND CONTINGENCIES (Note 9)
STOCKHOLDERS' EQUITY
Common stock, par value $0.01; 200,000,000 shares authorized; 30,508,322 shares issued and 30,499,327 outstanding at March 31, 2018; 30,482,966 shares issued and outstanding at December 31, 2017	305	305
Preferred stock, par value $0.01; 50,000,000 shares authorized and 0 shares issued and outstanding at March 31, 2018 and December 31, 2017	0	0
Treasury stock at cost (8,995 shares at March 31, 2018; 0 shares at December 31, 2017)	0	0
Additional paid-in capital	264,992	263,081
Retained earnings	133,168	121,985
Accumulated other comprehensive loss	(8,637)	(9,046)
Total stockholders' equity	389,828	376,325
Total liabilities and stockholders' equity	$ 990,481	$ 1,050,274

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.

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- 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).