Related Party Transactions (Leases) (Details) - Affiliated Entity - PAIST $ in Thousands	Dec. 31, 2017 USD ($)
Lease
2018	$ 2,992
2019	2,742
2020	2,992
2021	2,992
2022	2,992
2023 and thereafter	0
Total	14,710
Sub-Lease
2018	0
2019	0
2020	0
2021	0
2022	0
2023 and thereafter	0
Total	$ 0

Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 10
-Section 55
-Paragraph 40
-Subparagraph (Note 3)
-URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717