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
	Mar. 31, 2013	Mar. 31, 2012
Basic net income per share:
Net income	$ (4,050)	$ 6,693
Weighted average common shares outstanding (in shares)	27,796	28,345
Basic net income per common share (in dollars per share)	$ (0.15)	$ 0.24
Diluted net income per share:
Net income	$ (4,050)	$ 6,693
Weighted average common shares outstanding (in shares)	27,796	28,345
Effect of dilutive securities:
Stock options and restricted stock (in shares)	0	143
Weighted average common shares for diluted earnings per share (in shares)	27,796	28,488
Diluted net income per common share (in dollars per share)	$ (0.15)	$ 0.23