Acquisitions and FDIC Indemnification Asset (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Covered					$ 1,983	$ 4,881	$ 5,368	$ 5,602
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion		$ 0	$ 0
Loans and Leases Receivable, Disposals	$ (47)	(138)	(2,945)	$ (372)
Total Covered Assets	1,936	5,230	1,936	5,230
Consumer Loan [Member]
Business Acquisition [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Covered					0	1,430	1,456	1,480
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion		0	0
Loans and Leases Receivable, Disposals	0	(13)	(1,430)	(37)
Total Covered Assets	0	1,443	0	1,443
Commercial Loan [Member]
Business Acquisition [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Covered					$ 1,983	$ 3,451	$ 3,912	$ 4,122
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion		0	0
Loans and Leases Receivable, Disposals	(47)	(125)	(1,515)	(335)
Total Covered Assets	$ 1,936	$ 3,787	$ 1,936	$ 3,787