Noncontrolling Interest (Details) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2017	Apr. 30, 2017
Noncontrolling Interest [Abstract]
Ownership in joint venture by noncontrolling owners	30.00%
Non-cash contribution to joint venture by noncontrolling owner		$ 2.1

Carrying amount of the equity interests owned by noncontrolling shareholders, partners, or other equity holders in joint ventures included in the entity's consolidated financial statements.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=96868048&loc=SL4568740-111683

Name:	us-gaap_MinorityInterestInJointVentures
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant