Segment Information Segment Reporting (Details) $ in Thousands	3 Months Ended
Mar. 31, 2020 USD ($) Segment	Mar. 31, 2019 USD ($)
Segment Reporting [Abstract]
Number of Reportable Segments \| Segment	2
Segment Reporting Information [Line Items]
Total revenue	$ 91,035	$ 91,343
Gross profit	48,921	48,923
Operating income	18,638	5,544
Interest Expense	115	197
Other Nonoperating Income (Expense)	(1,111)	472
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	17,412	5,819
Lawson [Member]
Segment Reporting Information [Line Items]
Revenue	81,491	82,467
Gross profit	45,120	45,619
Operating income	18,094	5,458
Bolt [Member]
Segment Reporting Information [Line Items]
Revenue	9,544	8,876
Gross profit	3,801	3,304
Operating income	544	86
Product [Member]
Segment Reporting Information [Line Items]
Revenue	81,335	81,915
Product [Member] \| Lawson [Member]
Segment Reporting Information [Line Items]
Revenue	71,791	73,039
Gross profit	39,729	40,604
Service [Member]
Segment Reporting Information [Line Items]
Revenue	9,700	9,428
Service [Member] \| Lawson [Member]
Segment Reporting Information [Line Items]
Gross profit	$ 5,391	$ 5,015

Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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