Fair Value Measurements (Details) $ in Thousands	Jun. 30, 2018 USD ($)
Fair Value Measurements [Abstract]
Investments	$ 15,951

Amount of investments in equity securities and other forms of securities that provide ownership interests classified as available-for-sale, expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer.

No definition available.

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