Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Interest income	$ 14,931	$ 12,503	$ 28,890	$ 24,832
Interest expense	2,579	1,990	4,931	4,012
Net interest income (loss)	12,352	10,513	23,959	20,820
Provision for loan losses	500	575	1,000	1,200
Noninterest income	2,562	3,146	4,614	5,704
Noninterest expense	8,762	7,853	17,123	15,369
Net income (loss) before taxes	5,652	5,231	10,450	9,955
Income tax (provision) benefit	(2,048)	(1,925)	(3,734)	(3,643)
Net income (loss)	3,604	3,306	6,716	6,312
Total assets	1,539,226	1,290,710	1,539,226	1,290,710	$ 1,340,908
Commercial and Retail Banking [Member]
Segment Reporting Information [Line Items]
Interest income	14,851	12,410	28,744	24,677
Interest expense	2,442	1,894	4,665	3,817
Net interest income (loss)	12,409	10,516	24,079	20,860
Provision for loan losses	500	575	1,000	1,200
Noninterest income	959	911	1,954	2,022
Noninterest expense	7,667	6,698	15,114	13,032
Net income (loss) before taxes	5,201	4,154	9,919	8,650
Income tax (provision) benefit	(1,877)	(1,525)	(3,530)	(3,090)
Net income (loss)	3,324	2,629	6,389	5,560
Total assets	1,527,837	1,272,894	1,527,837	1,272,894
Mortgage Banking [Member]
Segment Reporting Information [Line Items]
Interest income	80	93	146	155
Interest expense
Net interest income (loss)	80	93	146	155
Provision for loan losses
Noninterest income	1,603	2,235	2,660	3,682
Noninterest expense	1,035	1,313	1,883	2,214
Net income (loss) before taxes	648	1,015	923	1,623
Income tax (provision) benefit	(240)	(387)	(342)	(611)
Net income (loss)	408	628	581	1,012
Total assets	10,958	15,011	10,958	15,011
Corporate [Member]
Segment Reporting Information [Line Items]
Interest income	6		8	1
Interest expense	143	96	274	196
Net interest income (loss)	(137)	(96)	(266)	(195)
Provision for loan losses
Noninterest income
Noninterest expense	60	(158)	126	123
Net income (loss) before taxes	(197)	62	(392)	(318)
Income tax (provision) benefit	69	(13)	138	58
Net income (loss)	(128)	49	(254)	(260)
Total assets	156,145	115,810	156,145	115,810
Eliminations [Member]
Segment Reporting Information [Line Items]
Interest income	(6)		(8)	(1)
Interest expense	(6)		(8)	(1)
Net interest income (loss)
Provision for loan losses
Noninterest income
Noninterest expense
Net income (loss) before taxes
Income tax (provision) benefit
Net income (loss)
Total assets	$ (155,714)	$ (113,005)	$ (155,714)	$ (113,005)