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Acquisition Activity (Schedule of Acquisition Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Acquisition costs	$ 0	$ 0	$ 494
Pacific Instruments, Inc.
Business Acquisition [Line Items]
Acquisition costs			431
Stress-Tek, Inc.
Business Acquisition [Line Items]
Acquisition costs			63
Accounting and Legal Fees | Pacific Instruments, Inc.
Business Acquisition [Line Items]
Acquisition costs			369
Accounting and Legal Fees | Stress-Tek, Inc.
Business Acquisition [Line Items]
Acquisition costs			51
Appraisal Fees | Pacific Instruments, Inc.
Business Acquisition [Line Items]
Acquisition costs			41
Appraisal Fees | Stress-Tek, Inc.
Business Acquisition [Line Items]
Acquisition costs			12
Other | Pacific Instruments, Inc.
Business Acquisition [Line Items]
Acquisition costs			21
Other | Stress-Tek, Inc.
Business Acquisition [Line Items]
Acquisition costs			$ 0

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+ References

No definition available.

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- Definition

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 23
-URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e1043-128460

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