Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Sales of goods	$ 127,093	$ 117,727	$ 218,904	$ 215,356
Sales of services	45,797	27,133	76,440	48,206
Total net sales	172,890	144,860	295,344	263,562
Cost of goods sold	105,846	94,291	181,146	173,692
Cost of services sold	34,530	22,833	59,656	40,882
Total cost of sales	140,376	117,124	240,802	214,574
Gross profit	32,514	27,736	54,542	48,988
Selling and administrative expenses	23,368	20,578	43,826	39,805
Amortization expense	1,775	1,695	3,560	3,454
Interest expense	1,654	2,181	3,612	4,289
Interest income	(24)	(54)	(95)	(110)
Equity in (income) loss of nonconsolidated investments	0	(145)	3	55
Other (expense) income	128	(18)	(480)	(13)
Total Operating Expenses	26,901	24,237	50,426	47,480
Income before income taxes	5,613	3,499	4,116	1,508
Income tax expense	673	475	1,198	906
Net income	$ 4,940	$ 3,024	$ 2,918	$ 602
Basic earnings per common share (usd per share)	$ 0.48	$ 0.29	$ 0.28	$ 0.06
Diluted earnings per common share (usd per share)	$ 0.47	$ 0.29	$ 0.28	$ 0.06

Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense. This item also represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. Such amount typically reflects adjustments similar to those made in preparing consolidated statements, including adjustments to eliminate intercompany gains and losses, and to amortize, if appropriate, any difference between cost and underlying equity in net assets of the investee at the date of investment.

No definition available.