Document and Entity Information Document Information - USD ($)	12 Months Ended
	Dec. 31, 2018	Jun. 30, 2018
Document Information [Line Items]
Entity Public Float		$ 356,954,131
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Document Type	10-K
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Amendment Flag	false