NET INCOME PER SHARE (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Computation of basic and diluted net income per share
Net Income (Numerator)	$ 5,157,000	$ 2,773,000	$ 7,196,000	$ 5,855,000
Less: amounts allocated to nonvested shares	(62,000)		(76,000)	(4,000)
Basic net income available to common stockholders	5,095,000	2,773,000	7,120,000	5,851,000
Effect of dilutive securities:
Diluted net income available to common stockholders	5,095,000	2,773,000	7,120,000	5,855,000
Weighted Average Common Shares Outstanding (Denominator)
Weighted Average Common Shares Outstanding Basic	35,599,000	35,069,000	35,539,000	35,081,000
Weighted Average Common Shares Outstanding Diluted	36,488,000	36,510,000	36,468,000	36,507,000
Per Share Amount
Basic net income available to common stockholders (in dollars per share)	$ 0.14	$ 0.08	$ 0.20	$ 0.17
Diluted net income available to common stockholders (in dollars per share)	$ 0.14	$ 0.08	$ 0.20	$ 0.16
Antidilutive securities excluded from computation of diluted net income per share
Weighted-average outstanding stock options that were antidilutive (in Shares)	3,200,000	1,800,000	3,200,000	2,200,000
Stock options
Weighted Average Common Shares Outstanding (Denominator)
Effect on weighted average common shares outstanding from dilutive securities	889,000	1,441,000	929,000	1,364,000
Nonvested shares
Effect of dilutive securities:
Effect on net income from dilutive securities	$ 62,000		$ 76,000	$ 4,000
Weighted Average Common Shares Outstanding (Denominator)
Effect on weighted average common shares outstanding from dilutive securities				62,000