Derivatives Instrument and Hedging Activities (Details 3) - Cash Flow Hedging - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2015	Sep. 30, 2015
Effect of Derivative Instrument on the Statements of Comprehensive Income (Loss)
Loss related to effective portion of derivative recognized in accumulated other comprehensive loss	$ (3,337)	$ (3,337)
Interest expense.
Effect of Derivative Instrument on the Statements of Comprehensive Income (Loss)
Gain related to effective portion of derivative reclassified from accumulated other comprehensive loss to interest expense	$ 362	$ 362

The effective portion of losses on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 10A

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669646-108580

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration