Loans (Troubled debt) (Narrative) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) loan
Financing Receivable, Recorded Investment [Line Items]
Principal deferment collected from government guarantees	$ 142
Capitalized interest and escrow	$ 17
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Number of loan relationships | loan	0