Recent Accounting Pronouncements - (Narratives) (Details) - ASU 2014-09	3 Months Ended
	Sep. 30, 2017
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Contract acquisition costs capitalization, description	Company capitalizes contract acquisition costs such as commissions paid for maintenance services contracts in excess of one year
Minimum
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Contract acquisition costs capitalization period	1 year