Investments And Joint Ventures (Available for Sale Securities) (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
Sep. 30, 2018	Jun. 30, 2018
Debt and Equity Securities, FV-NI [Line Items]
Shares held (in shares)	933
Equity investments	$ 690	$ 692
Yeo Hiap Seng Limited [Member]
Debt and Equity Securities, FV-NI [Line Items]
Equity ownership interest percentage, less than	1.00%

Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=99377092&loc=SL75136599-209740

Name:	us-gaap_EquitySecuritiesFvNi
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant