INCOME PER COMMON SHARE (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
INCOME PER COMMON SHARE [Abstract]
Net income for basic and diluted per share calculation	$ 28,095	$ 8,470	$ 1,226
Weighted average shares outstanding - basic (in shares)	10,558	9,757	9,351
Effect of potentially dilutive securities (in shares)	79	399	512
Weighted average shares outstanding - diluted (in shares)	10,637	10,156	9,863
Basic net income per share (in dollars per share)	$ 2.66	$ 0.87	$ 0.13
Diluted net income per share (in dollars per share)	$ 2.64	$ 0.83	$ 0.12