Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
OPERATING ACTIVITIES
Net Earnings (Loss) Including Noncontrolling Interest	$ 33,538	$ (6,205)	$ 46,614
Adjustments to Reconcile Net Earnings (Loss) to Net Cash Provided by Operating Activities:
Depreciation	32,291	26,199	17,891
Amortization of Intangible Assets	22,129	17,054	409
Amortization of Debt Issuance Costs	2,353	1,779	0
Debt Issuance Cost Charges Related to Short-Term Financing	0	6,200	0
Fair Value Step-Up Adjustment to Acquired Inventory	0	7,245	0
Deferred Income Taxes	(10,862)	(6,095)	(1,172)
Share-Based Compensation Expense	8,314	5,891	3,875
Allowance for Doubtful Accounts and Returns	768	1,602	468
Other, Net	(436)	364	(196)
Changes in Operating Assets and Liabilities, Net of Assets Acquired:
Receivables, Net	(7,618)	(14,381)	(9,278)
Inventories	(16,557)	(2,898)	23
Accounts Payable	4,569	10,849	(3,904)
Employee Compensation and Benefits	12,649	(7,780)	124
Other Current Liabilities	722	14,560	(185)
Income Taxes	(1,383)	285	5,427
Other Assets and Liabilities	(507)	(495)	(2,218)
Net Cash Provided by Operating Activities	79,970	54,174	57,878
INVESTING ACTIVITIES
Purchases of Property, Plant and Equipment	(18,780)	(20,437)	(26,526)
Proceeds from Disposals of Property, Plant and Equipment	112	2,511	615
Proceeds from Principal Payments Received on Long-Term Note Receivable	1,416	667	0
Issuance of Long-Term Note Receivable	0	(1,500)	(2,000)
Acquisitions of Businesses, Net of Cash Acquired	0	(354,073)	(12,933)
Purchase of Intangible Asset	(2,775)	(2,500)	0
Proceeds from Sale of Business	4,000	0	285
Net Cash Used in Investing Activities	(16,027)	(375,332)	(40,559)
FINANCING ACTIVITIES
Proceeds from Short-Term Debt	3,926	303,000	0
Repayments of Short-Term Debt	0	(303,000)	0
Proceeds from Issuance of Long-Term Debt	11,000	440,000	15,000
Payments of Long-Term Debt	(38,255)	(96,248)	(3,460)
Payments of Debt Issuance Costs	0	(16,482)	0
Change in Capital Lease Obligations	14	311	0
Purchases of Common Stock	0	0	(12,762)
Proceeds from Issuances of Common Stock	5,880	6,875	5,271
Excess Tax Benefit on Stock Plans	0	0	686
Purchase of Noncontrolling Owner Interest	0	(30)	0
Dividends Paid	(15,343)	(14,953)	(14,293)
Net Cash (Used in) Provided by Financing Activities	(32,778)	319,473	(9,558)
Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	(4,082)	2,186	(1,150)
NET INCREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	27,083	501	6,611
Cash, Cash Equivalents and Restricted Cash at Beginning of Year	59,051	58,550	51,939
CASH, CASH EQUIVALENTS, RESTRICTED CASH AND RESTRICTED CASH EQUIVALENTS AT END OF YEAR	86,134	59,051	58,550
Cash Paid During the Year for:
Income Taxes	11,132	13,542	14,172
Interest	22,367	14,228	1,135
Supplemental Non-Cash Investing and Financing Activities:
Long-Term Note Receivable from Sale of Business	0	0	5,489
Capital Expenditures in Accounts Payable	$ 2,311	$ 2,167	$ 2,045