Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 181,742	$ 185,113
Accounts receivable, net	171,193	146,383
Inventories	133,906	106,406
Income taxes prepaid and receivable	5,213	2,927
Asset held for sale		4,988
Prepaid expenses and other current assets	9,251	6,243
Total current assets	501,305	452,060
Property, plant and equipment, net	422,564	357,470
Intangibles, net	66,454	154
Goodwill	160,375	66,373
Income taxes receivable and deferred	68,865	108,945
Contract receivables	14,045
Other assets	29,825	24,560
Total assets	1,263,433	1,009,562
Current liabilities:
Notes and loans payable	312	587
Accounts payable	43,305	26,753
Accrued liabilities	95,195	91,785
Current maturities of long-term debt	51,666	16
Income taxes payable	9,531	7,090
Total current liabilities	200,009	126,231
Long-term debt	432,918	265,080
Other noncurrent liabilities	106,827	101,544
Deferred taxes and other liabilities	12,389	14,154
Total liabilities	752,143	507,009
Commitments and Contingencies
Shareholders' Equity
Preferred stock, par value $5.00 per share; authorized 2,000,000 shares; none issued
Additional paid-in capital	425,953	423,108
Retained earnings	522,855	491,950
Accumulated items of other comprehensive income:
Translation adjustments	(133,298)	(108,655)
Pension and postretirement liability adjustments	(51,719)	(48,725)
Derivative valuation adjustment	828	(1,464)
Treasury stock (Class A), at cost; 8,443,444 shares in 2016 and 8,455,293 shares in 2015	(257,136)	(257,391)
Total Company shareholders' equity	507,523	498,863
Noncontrolling interest	3,767	3,690
Total Equity	511,290	502,553
Total liabilities and shareholders' equity	1,263,433	1,009,562
Common Class A [Member]
Shareholders' Equity
Common Stock	37	37
Common Class B [Member]
Shareholders' Equity
Common Stock	$ 3	$ 3