Condensed Consolidated Statements of Cash Flows - Unaudited - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 11,419	$ 11,548
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	5,924	5,483
Pension and Other Postretirement Expense (Income)	251	107
Stock-based compensation	1,214	923
Deferred income taxes	1,063	1,289
Impairment of Long-Lived Assets to be Disposed of	854	0
Gain (Loss) on Disposition of Assets	40	(1)
Loss (gain) on foreign currency hedges, net of cash	53	(56)
Changes in assets and liabilities:
Accounts receivable	(2,682)	1,435
Inventories	1,053	(788)
Other assets	(1,687)	147
Accounts payable	1,275	2,855
Accrued payroll and benefits	(5,250)	(3,596)
Accrued expenses	(4,014)	(69)
Income taxes payable	(535)	1,179
Other liabilities	742	(224)
Pension and other post-retirement plans	(47)	(80)
Net cash provided by operating activities	9,593	20,154
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(5,325)	(6,912)
Proceeds from sale of assets	51	0
Net cash used in investing activities	(5,274)	(6,912)
CASH FLOWS FROM FINANCING ACTIVITIES:
Payments of long-term debt	(159,100)	(334,100)
Proceeds from borrowings of long-term debt	159,100	331,800
Payments for Repurchase of Common Stock	(849)	0
Dividends paid	(1,310)	(1,318)
Net cash used in financing activities	(4,796)	(5,041)
Payments Related to Tax Withholding for Share-based Compensation	(2,637)	(1,423)
Effect of exchange rate changes on cash and cash equivalents	252	(390)
Net (decrease) increase in cash and cash equivalents	(225)	7,811
Cash and cash equivalents at beginning of period	100,933	113,572
Cash and cash equivalents at end of period	100,708	121,383
Supplemental cash flow information:
Cash paid for interest	281	486
Cash paid for income taxes, net	2,122	809
Capital Expenditures Incurred but Not yet Paid	$ 3,734	$ 5,173