INCOME TAXES (Narratives) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating Loss Carryforwards [Line Items]
Provision for income taxes	$ 124,851	$ 94,943	$ 91,692
State net operating loss carryforwards	54,498	61,658
Decrease in valuation allowance	(4,791)	(4,655)
Income tax receivables	10,201	4,138
Interest and penalties recognized as income tax expense (benefit)	266	138	(1,067)
Balance of accrued interest and penalties included in lliability for unrecognized income tax benefits	1,369	1,103	965
Unrecognized income tax benefits that would affect the effective tax rate if recognized	9,884	$ 7,614	$ 6,282
Undistributed earnings from foreign subsidiaries	154,874
Deferred income tax liability not recognized from undistributed foreign earnings	$ 32,860
Earliest Tax Year [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards expiration date	Dec. 31, 2022
Latest Tax Year [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards expiration date	Dec. 31, 2029
Alabama [Member]
Operating Loss Carryforwards [Line Items]
State net operating loss carryforwards	$ 53,220