EARNINGS PER COMMON SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Numerator
Net income	$ 11,821	$ 5,226	$ 20,716	$ 15,554
Net Income (Loss) Available to Common Stockholders, Basic	$ 9,242	$ 5,226	$ 15,310	$ 15,554
Denominator
Basic weighted average common shares (in shares)	37,358,334	37,178,162	37,334,120	37,121,384
Dilutive stock options and restricted stock units (in shares)	470,239	286,952	443,338	154,629
Dilutive weighted average common shares (in shares)	37,828,573	37,465,114	37,777,458	37,276,013
Basic earnings per common share (USD per shares)	$ 0.25	$ 0.14	$ 0.41	$ 0.42
Dilutive earnings per common share (USD per shares)	$ 0.24	$ 0.14	$ 0.41	$ 0.42