Current Accounting Developments (Narrative) (Details) $ in Thousands		3 Months Ended
		Mar. 31, 2019 USD ($) Branch ATM Office	Jan. 01, 2019 USD ($)
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Operating lease, liability	[1]	$ 10,066
ASU 2016-02 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Number of branch locations | Branch		21
Number of ATM locations | ATM		3
Number of administration offices | Office		1
Operating lease, right of use asset			$ 10,000
Operating lease, liability			$ 10,000
ASU 2016-13 [Member] | Minimum [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for loan and lease losses increase in percentage		100.00%

[1] Lease liability is included in other liabilities.