EARNINGS PER SHARE (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Earnings Per Share Reconciliation [Abstract]
Basic									46,991	46,743	46,372
Dilutive effect of stock options and deferred stock compensation									921	669	641
Diluted									47,912	47,412	47,013
Earnings from continuing operations					$ 0.82	$ 0.24	$ 0.49	$ 0.42	$ 2.94	$ 1.98	$ 2.56
Earnings from continuing operations					$ 0.81	$ 0.24	$ 0.48	$ 0.42	$ 2.88	$ 1.95	$ 2.52
Earnings from continuing operations	$ 47,307	$ 36,361	$ 33,370	$ 20,943	$ 38,169	$ 11,443	$ 22,835	$ 19,842	$ 137,981	$ 92,289	$ 118,620