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Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Earnings Per Share [Abstract]
Net income available to common stockholders	$ 4,956	$ 5,100	$ 4,299	$ 4,792	$ 3,241	$ 3,894	$ 3,948	$ 4,948	$ 19,147	$ 16,031	$ 16,823
Weighted average shares outstanding - basic									54,637,680	54,339,467	56,216,794
Effect of non-vested restricted stock and stock options outstanding									922,629	776,213	626,094
Weighted average shares outstanding-diluted									55,560,309	55,115,680	56,842,888
Earnings per share-basic	$ 0.09	$ 0.09	$ 0.08	$ 0.09	$ 0.06	$ 0.07	$ 0.07	$ 0.10	$ 0.35	$ 0.30	$ 0.30
Earnings per share-diluted	$ 0.08	$ 0.09	$ 0.08	$ 0.09	$ 0.06	$ 0.07	$ 0.07	$ 0.09	$ 0.34	$ 0.29	$ 0.30

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