Derivative Instruments and Hedging Activity (Details 1) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Derivatives designated as cash flow hedges
Interest Rate Cash Flow Hedge Asset at Fair Value	$ 1,592	$ 1,409
Interest Rate Cash Flow Hedge Liability at Fair Value	$ 242	$ 1,994

Fair value as of the balance sheet date of all interest rate derivative liabilities designated as cash flow hedging instruments.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624163-113959

Name:	us-gaap_InterestRateCashFlowHedgeLiabilityAtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant