CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 57,234	$ 53,629
Receivables (net of allowance of $1,495 and $1,675)	85,739	96,674
Revenue recognized in excess of billings on uncompleted contracts	8,430	9,156
Inventories	114,416	110,364
Deferred income taxes - current	22,205	22,537
Other current assets	12,534	15,365
Total current assets	300,558	307,725
Property, plant and equipment, net	307,268	311,019
Intangibles, net	5,044	5,961
Goodwill	25,454	25,777
Deferred income taxes - long-term	2,678	2,816
Other assets	3,502	3,220
Total assets	644,504	656,518
Current liabilities:
Accounts payable and accrued liabilities	47,828	53,716
Billings in excess of revenue recognized on uncompleted contracts	3,919	3,581
Payroll and benefits payable	11,067	13,753
Accrued income taxes	1,211	2,091
Current portion of long-term debt	7,500	7,500
Total current liabilities	71,525	80,641
Long-term debt	94,794	103,941
Deferred income taxes - long-term	40,246	41,383
Accrued pension and other liabilities	36,161	36,562
Total liabilities	242,726	262,527
Commitments and contingencies (Note 11)
Stockholders' equity:
Common stock, $.01 par value, 100,000,000 shares authorized, 57,786,052 and 57,646,683 shares issued	578	576
Additional paid-in capital	184,981	181,713
Retained earnings	410,781	398,627
Treasury stock, at cost, 10,780,813 and 10,232,612 shares	(153,939)	(145,295)
Accumulated other comprehensive loss	(40,623)	(41,630)
Total stockholders' equity	401,778	393,991
Total liabilities and stockholders' equity	$ 644,504	$ 656,518