ACQUISITIONS Narrative (Details) $ in Thousands			3 Months Ended
	Feb. 26, 2020	Mar. 15, 2019	Mar. 31, 2020 USD ($) NumberAcquisitions	Mar. 31, 2019 USD ($) NumberAcquisitions
Business Acquisition [Line Items]
Number of Businesses Acquired | NumberAcquisitions			1	1
Purchase Price, Net of Cash Acquired			$ 51,043	$ 49,037
2019 acquisitions [Member]
Business Acquisition [Line Items]
Total purchase price				49,037
Purchase Price, Net of Cash Acquired				49,037
2020 acquisitions
Business Acquisition [Line Items]
Total purchase price			60,211
Commercial Industrial
Business Acquisition [Line Items]
Total purchase price			$ 60,000
Commercial Industrial | Dyna-Flo Valve Services Ltd. (Dyna-Flo) [Member]
Business Acquisition [Line Items]
Effective Date of Acquisition	Feb. 26, 2020
Defense | Tactical Communications Group (TCG) [Member]
Business Acquisition [Line Items]
Effective Date of Acquisition		Mar. 15, 2019
Purchase Price, Net of Cash Acquired				$ 49,000