Investment Securities (Details) - Schedule of realized gains and losses - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Schedule of realized gains and losses [Abstract]
Proceeds	$ 29,543	$ 85,253	$ 65,231
Gross gains on sales of investment securities	1,596	4,234	3,931
Gross losses on sales of investment securities
Net gains on sales of investment securities	1,596	4,234	3,931
Less: tax provision on net gains	(579)	(1,682)	(1,564)
Net gains on sales of investment securities, after tax	$ 1,017	$ 2,552	$ 2,367

The net realized gain (loss) on investments sold during the period, not including gains (losses) on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, which, for cash flow reporting, is a component of proceeds from investing activities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

Name:	us-gaap_GainLossOnSaleOfInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration