Income Taxes - Deferred Taxes and Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Valuation Allowance [Line Items]
Deferred Tax Assets, Derivative Instruments	$ 7,614	$ 6,800
Deferred Tax Asset - basis in securities	1,810	5,661
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Provision for Loan Losses	1,929	1,862
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost	623	532
Deferred Tax Assets, Capital Loss Carryforwards	36	36
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation	967	778
Deferred Tax Assets, Other	121	74
Deferred Tax Assets, Gross	13,064	15,707
Deferred Tax Liabilities, Other Comprehensive Income	4,807	12,376
Deferred Tax Liabilities, Derivatives	1,827	1,203
Deferred Tax Liabilities, Other	61	80
Deferred Tax Liabilities, Gross	6,695	13,659
Deferred tax asset, net	6,369	2,048
Tax Credit Carryforward, Amount	200
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	0	1,365	$ 0
Capital Loss Carryforward [Member]
Valuation Allowance [Line Items]
Deferred Tax Assets, Valuation Allowance	(36)	$ (36)
Expired Capital Loss Carryforward [Member]
Valuation Allowance [Line Items]
Tax Credit Carryforward, Amount	$ 0