EARNINGS PER SHARE (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share Reconciliation [Abstract]
Basic									44,389	46,624	48,019
Dilutive effect of stock options and deferred stock compensation									656	992	1,056
Diluted									45,045	47,616	49,075
Earnings from continuing operations	$ 1.60	$ 1.04	$ 0.90	$ 0.74	$ 1.56	$ 0.82	$ 0.85	$ 0.91	$ 4.27	$ 4.12	$ 3.54
Earnings from continuing operations	$ 1.58	$ 1.02	$ 0.88	$ 0.73	$ 1.53	$ 0.80	$ 0.83	$ 0.89	$ 4.20	$ 4.04	$ 3.46
Earnings from continuing operations	$ 70,668	$ 45,932	$ 39,963	$ 32,819	$ 70,762	$ 38,142	$ 40,121	$ 43,223	$ 189,382	$ 192,248	$ 169,949