Quarterly Results of Operations (Unaudited) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Results of Operations (Unaudited)
Interest income	$ 22,037	$ 21,034	$ 19,231	$ 18,022	$ 17,973	$ 16,374	$ 14,936	$ 14,235	$ 80,324	$ 63,518	$ 52,947
Interest Expense	2,770	2,014	1,533	1,387	1,307	1,366	1,347	1,336	7,704	5,356	7,149
Provision for Loan and Lease Losses	1,421	1,284	1,030	949	596	646	322	296	4,684	1,860	751
Noninterest Income	5,402	4,467	2,471	2,052	2,617	2,321	2,431	1,724	14,392	9,093	12,572
Noninterest Expense	16,468	13,343	11,641	13,541	12,009	11,771	15,856	11,179	54,993	50,815	31,854
Income tax provision	2,889	3,410	2,855	1,565	2,474	1,846	91	1,176	10,719	5,587	9,989
NET INCOME	$ 3,891	$ 5,450	$ 4,643	$ 2,632	$ 4,204	$ 3,066	$ (249)	$ 1,972	$ 16,616	$ 8,993	$ 15,776
Earnings per share:
Basic (in dollars per share)	$ 0.22	$ 0.32	$ 0.28	$ 0.15	$ 0.26	$ 0.19	$ (0.02)	$ 0.14	$ 0.97	$ 0.57	$ 1.49
Diluted (in dollars per share)	$ 0.23	$ 0.31	$ 0.27	$ 0.15	$ 0.25	$ 0.18	$ (0.02)	$ 0.13	$ 0.96	$ 0.54	$ 1.44