CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 51,331	$ 49,237
Accounts receivable, (net of allowance for doubtful receivables of $1,842 and $1,440, respectively)	107,786	144,938
Contract assets	28,245	23,040
Inventories	80,544	84,465
Taxes receivable	3,427	2,912
Prepaid expenses and other current assets	12,264	12,486
Total current assets	283,597	317,078
Property, plant and equipment, net	221,642	213,369
Operating lease right-of-use assets	23,116	0
Goodwill	133,912	196,963
Other intangible assets, net	115,577	136,604
Deferred tax assets	1,933	2,055
Other assets, net	6,160	6,617
Total assets	785,937	872,686
Current liabilities:
Current portion of long-term debt	9,928	10,172
Accounts payable	73,426	73,265
Accrued payroll and other compensation	17,198	16,621
Deferred revenue	2,643	6,990
Other accrued liabilities	26,663	14,298
Total current liabilities	129,858	121,346
Long-term debt	262,713	314,641
Long-term lease liability	18,424	0
Deferred tax liabilities	34,561	39,265
Benefit plan liabilities	18,957	22,795
Other long-term liabilities	3,004	5,364
Commitments and Contingencies (Note 17)
Stockholders’ equity:
Preferred stock (par value $0.01 per share; authorized 500 shares; none issued or outstanding) (Note 11)	0	0
Common stock (par value $0.01 per share; authorized 30,000 shares; issued 25,328 and 25,254 shares, respectively) (Note 11)	253	253
Capital in excess of par value	94,140	90,851
Retained earnings	340,629	411,325
Accumulated other comprehensive loss	(25,979)	(42,685)
Treasury stock, 7,705 and 7,698 shares of common stock, respectively, at cost	(90,623)	(90,469)
Total stockholders’ equity	318,420	369,275
Total liabilities and stockholders’ equity	$ 785,937	$ 872,686