ACQUISITIONS - Narrative (Details) - USD ($) $ in Thousands					12 Months Ended
	Jun. 03, 2021	Mar. 02, 2020	May 22, 2019	Feb. 28, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Total purchase consideration net of cash acquired					$ 14,750	$ 223,230	$ 59,200
Goodwill recorded in acquisition					$ 10,997	$ 177,264
Combinex
Business Acquisition [Line Items]
Total purchase consideration net of cash acquired	$ 14,700
Goodwill recorded in acquisition	$ 10,800
Prime Distribution
Business Acquisition [Line Items]
Cash consideration for acquisition		$ 222,700
Goodwill recorded in acquisition		$ 176,700
Dema Service
Business Acquisition [Line Items]
Total purchase consideration net of cash acquired			$ 14,200
Goodwill recorded in acquisition			7,800
Goodwill recognized for foreign tax purposes			$ 0
Space Cargo
Business Acquisition [Line Items]
Total purchase consideration net of cash acquired				$ 45,500
Goodwill recorded in acquisition				26,700
Goodwill recognized for foreign tax purposes				$ 0