SEGMENT INFORMATION (Reconciliation) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Segment Information [Abstract]
Operating income	$ 40,540	$ 48,926	$ 76,099	$ 88,117
Interest expense	(6,526)	(4,967)	(13,008)	(10,088)
Other income, net	130	25	232	77
Earnings before income taxes	$ 34,144	$ 43,984	$ 63,323	$ 78,106