The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(2)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Subsequent Events (Details) - Chief executive officer - Restricted Stock Units - USD ($) $ in Millions		3 Months Ended
	Apr. 18, 2018	Jun. 30, 2018
Forecast
Subsequent Event [Line Items]
Accelerated compensation cost		$ 1.7
Subsequent Event \| June 29, 2015
Subsequent Event [Line Items]
Vested (in shares)	175,000
Subsequent Event \| September 6, 2017
Subsequent Event [Line Items]
Vested (in shares)	100,000