Fair Value Measurements (Narrative) (Details) - USD ($) $ in Thousands			3 Months Ended
		Aug. 01, 2015	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Payment of contingent consideration liability			$ 0	$ 1,217
Contingent consideration liability					$ 0
Recorded Investment of Impaired Loans with Related Allowance	[1]		868		523
Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Recorded Investment of Impaired Loans with Related Allowance			0		883
Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Recorded Investment of Impaired Loans with Related Allowance			0		883
Allowance For Loan Loss Allocation on Collateral Dependent Impaired Loans			$ 111		$ 24
Contingent Consideration [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Earn-out period post acquisition		5 years

[1] The recorded investment in impaired loans consists of unpaid principal balance, net of charge-offs, interest payments received applied to principal and unamortized deferred loan origination fees and costs. For accruing impaired loans (troubled debt restructurings for which management has concluded that the collectibility of the loan is not in doubt), the recorded investment also includes accrued interest.