INCOME TAXES (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current:
Federal	$ 54,778	$ 54,815	$ 48,505
State	9,259	8,717	7,723
Foreign	3,883	3,648	3,373
Deferred:
Federal	(468)	(2,326)	191
State	730	484	528
Foreign	94	(28)	65
TOTAL PROVISION FOR INCOME TAXES	68,276	65,310	60,385
Reconciliation of primary factors causing income tax expense to be different than the federal statutory rate
Income tax at statutory rate	67,063	61,825	56,384
State income tax expense (net of federal benefit)	6,498	5,835	5,477
Foreign tax benefit	(2,661)	(2,560)	(2,109)
Other	(2,624)	210	633
TOTAL PROVISION FOR INCOME TAXES	68,276	65,310	60,385
Effective income tax rate (as a percent)	35.60%	37.00%	37.50%
Income taxes paid net of refunds	$ 69,354	$ 62,998	$ 51,983