Securities (Details Textual) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) Securities	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) Securities	Jun. 30, 2018 USD ($)
Schedule Of Available For Sale Securities [Line Items]
Proceeds from the sale	$ 500,000	$ 2,300	$ 10,300	$ 2,600
Gross gains realized	2	2	24	6
Gross Losses realized	$ 2	1	57	3
Debt securities, unrealized losses			$ 888	10,500
Number of securities | Securities	588		588
Number of securities on unrealized loss position | Securities	83		83
ASU 2016-01 | Equity securities
Schedule Of Available For Sale Securities [Line Items]
Unrealized losses recognized in income statement for securities	$ 19
Unrealized gains recognized in income statement for securities		$ 26	$ 25	$ 42