NET INCOME PER SHARE (Basic and Diluted Net Income Per Share) (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Basic net income per share:
Net income (loss)	$ (28,550)	$ 13,211	$ (29,160)	$ 28,418
Weighted average common shares outstanding (in shares)	27,896	28,446	27,855	28,403
Basic net income per common share (in dollars per share)	$ (1.02)	$ 0.46	$ (1.05)	$ 1.00
Diluted net income per share:
Net income (loss)	$ (28,550)	$ 13,211	$ (29,160)	$ 28,418
Weighted average common shares outstanding (in shares)	27,896	28,446	27,855	28,403
Effect of dilutive securities:
Stock options and restricted stock (in shares)	0	331	0	226
Weighted average common shares for diluted earnings per share (in shares)	27,896	28,777	27,855	28,629
Diluted net income per common share (in dollars per share)	$ (1.02)	$ 0.46	$ (1.05)	$ 0.99