ACCRUED EXPENSES AND OTHER LIABILITIES (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Accrued Expenses
Salaries and wages	$ 113,119	$ 149,629
Deferred compensation	5,978	4,524
Pension benefits	3,772	3,754
Other postretirement benefits	1,395	1,387
Other employee benefits	12,683	28,370
Insurance obligations	151,643	139,314
Operating taxes	105,400	100,399
Income taxes	2,043	3,491
Interest	45,957	39,522
Deposits, mainly from customers	81,149	80,401
Operating lease liabilities	71,687	73,422
Deferred revenue	166,067	160,902
Restructuring liabilities	3,316	7,595
Other	55,667	55,029
Total	819,876	847,739
Non-Current Liabilities
Salaries and wages	0	0
Deferred compensation	60,372	55,279
Pension benefits	462,699	456,979
Other postretirement benefits	18,504	18,097
Other employee benefits	0	0
Insurance obligations	266,134	247,552
Operating taxes	0	0
Income taxes	20,747	18,477
Interest	0	0
Deposits, mainly from customers	3,319	3,390
Operating lease liabilities	137,647	137,384
Deferred revenue	418,084	421,176
Restructuring liabilities	0	0
Other	43,784	44,291
Total	1,431,290	1,402,625
Total
Salaries and wages	113,119	149,629
Deferred compensation	66,350	59,803
Pension benefits	466,471	460,733
Other postretirement benefits	19,899	19,484
Other employee benefits	12,683	28,370
Insurance obligations	417,777	386,866
Operating taxes	105,400	100,399
Income taxes	22,790	21,968
Interest	45,957	39,522
Deposits, mainly from customers	84,468	83,791
Operating lease liabilities	209,334	210,806
Deferred revenue	584,151	582,078
Restructuring liabilities	3,316	7,595
Other	99,451	99,320
Total	$ 2,251,166	$ 2,250,364