CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 37,984	$ 53,629
Receivables (net of allowance of $1,416 and $1,675)	108,056	96,674
Revenue recognized in excess of billings on uncompleted contracts	6,998	9,156
Inventories	125,115	110,364
Deferred income taxes - current		22,537
Other current assets	13,437	15,365
Total current assets	291,590	307,725
Property, plant and equipment, net	366,442	311,019
Intangibles, net	40,543	5,961
Goodwill	66,316	25,777
Deferred income taxes - long-term	7,957	2,816
Other assets	2,370	3,220
Total assets	775,218	656,518
Current liabilities:
Accounts payable and accrued liabilities	74,493	53,716
Billings in excess of revenue recognized on uncompleted contracts	4,063	3,581
Payroll and benefits payable	15,458	13,753
Accrued income taxes	1,641	2,091
Current portion of long-term debt	5,000	7,500
Total current liabilities	100,655	80,641
Long-term debt	220,000	103,941
Deferred income taxes - long-term	25,624	41,383
Accrued pension and other liabilities	47,796	36,562
Total liabilities	394,075	262,527
Commitments and contingencies (Notes 15 and 16)
Stockholders' equity:
Common stock, $.01 par value, 100,000,000 shares authorized, 61,531,025 and 61,300,553 shares issued (Note 11)	615	613
Additional paid-in capital	185,791	181,676
Retained earnings	402,286	398,627
Treasury stock, at cost, 10,781,001 and 10,232,612 shares	(153,950)	(145,295)
Accumulated other comprehensive loss	(53,599)	(41,630)
Total stockholders' equity	381,143	393,991
Total liabilities and stockholders' equity	$ 775,218	$ 656,518