Loans and the Allowance for Loan Losses (Details) - Loans by segment modified as troubled debt restructurings - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Recorded Investment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 20,518	$ 13,818
Additions	17,966	10,378
Payoffs/paydowns	(4,848)	(3,098)
Transfers		(580)
Other
Ending balance	33,636	20,518
ALLL [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance
Additions	147
Payoffs/paydowns
Transfers
Other	(125)
Ending balance	$ 22