2. STOCK-BASED COMPENSATION (Detail) - (Table 1) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Outstanding at January 1, 2013 (in Shares)	305,670
Outstanding at January 1, 2013	$ 16.71
Outstanding at January 1, 2013	4.0 years
Outstanding at January 1, 2013 (in Dollars)
Outstanding at March 31, 2013 (in Shares)	278,850
Outstanding at March 31, 2013	$ 17.20
Outstanding at March 31, 2013	3.8 years
Outstanding at March 31, 2013 (in Dollars)	8
Vested at March 31, 2013 (in Dollars)	252,520
Vested at March 31, 2013	$ 18.20
Vested at March 31, 2013	3.4 years
Vested at March 31, 2013 (in Dollars)
Non-vested at March 31, 2013 (in Shares)	26,330
Non-vested at March 31, 2013	$ 7.61
Non-vested at March 31, 2013	8.0 years
Non-vested at March 31, 2013 (in Dollars)	8
Granted (in Shares)
Granted
Granted
Granted (in Dollars)
Exercised (in Shares)
Exercised
Cancelled (in Shares)	26,820
Cancelled	$ 11.68
Expected to vest at March 31, 2013 (in shares)	19,750
Expected to vest at March 31, 2013	$ 7.61
Expected to vest at March 31, 2013	8 years
Expected to vest at March 31, 2013 (in Dollars)