ACQUISITIONS ASSETS ACQUIRED (TABLES) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Oct. 26, 2019	Jan. 01, 2019	Dec. 31, 2018	Apr. 30, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Operating lease assets	$ 150,808		$ 129,894
Total deferred tax assets, net	60,392			$ 45,295
Goodwill	301,694			204,633		$ 209,727
Operating lease liability - short-term	45,218		35,535
Accrued employee compensation and benefits	114,165			$ 83,437
Operating lease liability - long-term	$ 127,395		$ 112,754
FCR
Business Acquisition [Line Items]
Cash		$ 5,225
Accounts receivable.		10,659
Prepaid Expenses		357
Property, plant and equipment.		6,006
Other assets		224
Operating lease assets		5,127
Goodwill		96,993
Total assets acquired		171,731
Accounts payable		388
Operating lease liability - short-term		1,160
Accrued employee compensation and benefits		4,049
Accrued expenses		72
Operating lease liability - long-term		3,967
Total liabilities assumed		9,636
Total purchase price		162,095
FCR | Trade Names [Member]
Business Acquisition [Line Items]
Intangible assets		8,600
FCR | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets		$ 38,540
SCS
Business Acquisition [Line Items]
Cash					$ 4,530
Accounts receivable.					985
Prepaid Expenses					39
Goodwill					1,231
Total assets acquired					10,404
Accounts payable					216
Accrued employee compensation and benefits					27
Accrued expenses					21
Deferred tax liabilities					629
Total liabilities assumed					893
Total purchase price					9,511
SCS | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets					$ 3,619