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		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Basic net income per share:
Net income (loss)	$ 3,440	$ 8,514	$ (610)	$ 15,207
Weighted average common shares outstanding (in shares)	27,873	28,419	27,834	28,382
Basic net income per common share (in dollars per share)	$ 0.12	$ 0.30	$ (0.02)	$ 0.54
Diluted net income per share:
Net income (loss)	$ 3,440	$ 8,514	$ (610)	$ 15,207
Weighted average common shares outstanding (in shares)	27,873	28,419	27,834	28,382
Effect of dilutive securities:
Stock options and restricted stock (in shares)	245	190	0	167
Weighted average common shares for diluted earnings per share (in shares)	28,118	28,609	27,834	28,549
Diluted net income per common share (in dollars per share)	$ 0.12	$ 0.30	$ (0.02)	$ 0.53