Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Amortized intangible assets [Abstract]
Gross carrying value	[1]	$ 3,370		$ 3,370		$ 3,237
Accumulated amortization	[1]	(1,498)		(1,498)		(1,141)
Net carrying value	[1]	1,872		1,872		2,096
Unamortized intangible assets [Abstract]
Goodwill		21,089		21,089		21,089
Actual and Estimated Future Amortization Expense [Abstract]
Amortization expense		118	$ 124	357	$ 378
Estimated Amortization Expense [Abstract]
Remaining 2017		122		122
2018		404		404
2019		370		370
2020		280		280
2021		225		225
MSRs [Member]
Amortized intangible assets [Abstract]
Gross carrying value	[1]	1,604		1,604		1,471
Accumulated amortization	[1]	(921)		(921)		(787)
Net carrying value	[1]	683		683		684
Actual and Estimated Future Amortization Expense [Abstract]
Amortization expense		44	42	134	132
Estimated Amortization Expense [Abstract]
Remaining 2017		49		49
2018		138		138
2019		134		134
2020		103		103
2021		78		78
Core Deposit Intangibles [Member]
Amortized intangible assets [Abstract]
Gross carrying value	[1]	1,641		1,641		1,641
Accumulated amortization	[1]	(520)		(520)		(320)
Net carrying value	[1]	1,121		1,121		1,321
Actual and Estimated Future Amortization Expense [Abstract]
Amortization expense		66	74	200	222
Estimated Amortization Expense [Abstract]
Remaining 2017		65		65
2018		236		236
2019		206		206
2020		177		177
2021		147		147
Covenant not to Compete [Member]
Amortized intangible assets [Abstract]
Gross carrying value	[1]	125		125		125
Accumulated amortization	[1]	(57)		(57)		(34)
Net carrying value	[1]	68		68		$ 91
Actual and Estimated Future Amortization Expense [Abstract]
Amortization expense		8	$ 8	23	$ 24
Estimated Amortization Expense [Abstract]
Remaining 2017		8		8
2018		30		30
2019		30		30
2020		0		0
2021		$ 0		$ 0

[1] Excludes fully amortized intangible assets