SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 8) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Stock-based compensation
Non-cash stock-based compensation	$ 3,543	$ 3,249	$ 2,043
Stock options
Stock-based compensation
Options granted (in shares)	64,000	146,500	172,500
Non-cash stock-based compensation	1,800	1,600	1,100
Vesting period	4 years
Restricted Stock
Stock-based compensation
Non-cash stock-based compensation	$ 1,800	$ 1,400	$ 900
Restricted shares of common stock issued (in shares)	72,083	22,925	64,477
Vesting period	4 years