Fair Value Measurements (Details) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017
Fair Value Disclosures [Abstract]
Fair value adjustment to assets	$ 0.1	$ 0.0
Fair value adjustment to liabilities	$ 0.1	$ 0.0

Amount of addition (reduction) to the amount at which a liability could be incurred (settled) in a current transaction between willing parties.

No definition available.

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