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ACCRUED EXPENSES AND OTHER LIABILITIES (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Accrued Expenses    
Salaries and wages $ 68,831 $ 90,913
Deferred compensation 3,548 2,992
Pension benefits 3,808 3,796
Other postretirement benefits 1,507 1,506
Other employee benefits 11,437 29,358
Insurance obligations 126,520 127,470
Operating taxes 98,717 92,150
Income taxes 1,784 4,197
Interest 28,807 27,277
Customer deposits 63,320 61,225
Deferred revenue 14,758 14,064
Restructuring liabilities 4,387 7,278
Other 41,035 44,963
Total 468,459 507,189
Non-Current Liabilities    
Salaries and wages 0 0
Deferred compensation 48,550 46,541
Pension benefits 455,625 451,940
Other postretirement benefits 19,365 19,459
Other employee benefits 2,325 5,854
Insurance obligations 265,466 234,336
Operating taxes 0 0
Income taxes 24,091 23,174
Interest 0 0
Customer deposits 4,501 4,569
Deferred revenue 0 0
Restructuring liabilities 0 0
Other 32,912 31,692
Total 852,835 817,565
Total    
Salaries and wages 68,831 90,913
Deferred compensation 52,098 49,533
Pension benefits 459,433 455,736
Other postretirement benefits 20,872 20,965
Other employee benefits 13,762 35,212
Insurance obligations 391,986 361,806
Operating taxes 98,717 92,150
Income taxes 25,875 27,371
Interest 28,807 27,277
Customer deposits 67,821 65,794
Deferred revenue 14,758 14,064
Restructuring liabilities 4,387 7,278
Other 73,947 76,655
Total $ 1,321,294 $ 1,324,754