Quarterly Results (Unaudited) (Textual) (Details) $ in Thousands	3 Months Ended
	Dec. 31, 2015 USD ($) foreign_subsidiary	Dec. 31, 2016 USD ($)
Condensed Financial Statements, Captions [Line Items]
Valuation allowance	$ 45,565	$ 50,114
Foreign tax authority [Member]
Condensed Financial Statements, Captions [Line Items]
Valuation allowance	$ 1,500	$ 1,100
Number of foreign subsidiaries, valuation allowance recorded | foreign_subsidiary	1