Investment in Unconsolidated Affiliates (Detail Textuals) - Kingdom Holding 1 BV ("KH1") € in Millions, $ in Millions	1 Months Ended
Feb. 29, 2016 USD ($)	Feb. 29, 2016 EUR (€)	Apr. 30, 2017
Schedule of Equity Method Investments [Line Items]
Percentage of ownership interest	19.00%	19.00%	19.00%
Amount paid to acquired interest in joint venture	$ 35.4	€ 32.5

The cash outflow associated with the investment in or advances to an entity in which the reporting entity shares control of the entity with another party or group.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585

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