EARNINGS PER SHARE (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
EARNINGS PER SHARE [Abstract]
Net income from continuing operations	$ 9,416	$ 5,720	$ 6,693	$ 6,226	$ 3,281	$ 5,822	$ 4,853	$ 2,932	$ 28,055	$ 16,888	$ 8,966
Weighted-average shares outstanding - basic									47,596	49,619	58,009
Unvested restricted shares									490	352	342
Dilutive stock options									6		4
Weighted-average shares outstanding - diluted									48,092	49,971	58,355
Weighted average number of anti-dilutive shares									100	700	900