Business Segments - Segment Financial Results (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)
Segment Reporting Information [Line Items]
Net interest income	$ 9,966	$ 8,092	$ 18,941	$ 15,915
Provision for loan losses	0	(600)	0	(1,200)
Noninterest income	6,957	6,556	12,377	10,877
Noninterest expense	(10,944)	(9,605)	(21,321)	(18,527)
INCOME BEFORE PROVISION FOR INCOME TAXES	5,979	4,443	9,997	7,065
Provision for income taxes	(1,620)	(1,608)	(3,045)	(2,569)
NET INCOME	4,359	2,835	6,952	4,496
Total average assets at quarter end	$ 902,483	$ 786,825	$ 870,793	$ 783,432
FTEs	324	293	324	293
Home Lending
Segment Reporting Information [Line Items]
Net interest income	$ 415	$ 385	$ 1,045	$ 913
Provision for loan losses	(117)	(101)	(197)	(126)
Noninterest income	5,462	5,469	9,849	8,870
Noninterest expense	(4,382)	(3,719)	(8,399)	(6,732)
INCOME BEFORE PROVISION FOR INCOME TAXES	1,378	2,034	2,298	2,925
Provision for income taxes	(374)	(737)	(700)	(1,064)
NET INCOME	1,004	1,297	1,598	1,861
Total average assets at quarter end	$ 197,431	$ 148,037	$ 184,499	$ 137,334
FTEs	117	98	117	98
Commercial and Consumer Banking
Segment Reporting Information [Line Items]
Net interest income	$ 9,551	$ 7,707	$ 17,896	$ 15,002
Provision for loan losses	117	(499)	197	(1,074)
Noninterest income	1,495	1,087	2,528	2,007
Noninterest expense	(6,562)	(5,886)	(12,922)	(11,795)
INCOME BEFORE PROVISION FOR INCOME TAXES	4,601	2,409	7,699	4,140
Provision for income taxes	(1,246)	(871)	(2,345)	(1,505)
NET INCOME	3,355	1,538	5,354	2,635
Total average assets at quarter end	$ 705,052	$ 638,788	$ 686,294	$ 646,098
FTEs	207	195	207	195