SEGMENT INFORMATION (Reconciliation) (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Operating income	$ 288,848,000	$ 403,953,000	$ 373,626,000
Interest expense	(35,545,000)	(31,347,000)	(33,983,000)
Other income, net	9,748,000	23,856,000	16,596,000
Earnings before income taxes	263,051,000	396,462,000	356,239,000
Assets
Total assets	4,021,334,000	3,764,261,000	3,255,385,000
Non Segment Other Assets [Member]
Assets
Total assets	126,288,000	69,976,000	37,360,000
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating income	326,613,000	439,062,000	409,973,000
Assets
Total assets	3,818,305,000	3,459,025,000	3,079,972,000
Operating Segments [Member] | Assets Held For Sale
Assets
Total assets	27,584,000	0	0
Operating Segments [Member] | Corporate And Other [Member]
Segment Reporting Information [Line Items]
Operating income	(37,765,000)	(35,109,000)	(36,347,000)
Assets
Total assets	175,445,000	305,236,000	175,413,000
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Operating income	(37,765,000)	(35,109,000)	(36,347,000)
Non-Segment
Assets
Total assets	$ 49,157,000	$ 235,260,000	$ 138,053,000