NET INCOME PER SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
NET INCOME PER SHARE
Net income	$ (3,419)	$ 2,842	$ (5,717)	$ 6,779
Less: amounts allocated to nonvested shares		(28)		(67)
Basic net income available to common stockholders		2,814		6,712
Computation of basic and diluted net income per share
Add back: amounts allocated to nonvested shares		28		67
Less: amounts re-allocated to nonvested shares		(28)		(67)
Diluted net income available to common stockholders		$ 2,814		$ 6,712
Weighted Average Common Shares Outstanding (Denominator)
Weighted Average Common Shares Outstanding Basic	35,365,000	35,933,000	35,115,000	35,765,000
Weighted Average Common Shares Outstanding Diluted	35,365,000	36,859,000	35,115,000	36,702,000
Per Share Amount
Basic net income (loss) available to common stockholders (in dollars per share)	$ (0.10)	$ 0.08	$ (0.16)	$ 0.18
Diluted net income (loss) available to common stockholders (in dollars per share)	$ (0.10)	$ 0.08	$ (0.16)	$ 0.18
Stock options
Weighted Average Common Shares Outstanding (Denominator)
Effect on weighted average common shares outstanding from dilutive securities		926,000		937,000
Antidilutive securities excluded from computation of diluted net income per share
Anti-dilutive securities (in shares)	2,300,000	2,400,000	2,000,000	2,500,000
Stock options or nonvested shares
Antidilutive securities excluded from computation of diluted net income per share
Anti-dilutive securities (in shares)	400,000		500,000