Annual report pursuant to Section 13 and 15(d)

Equity - Summary of Information Pertaining to Stock Options Vested and Exercised (Details)

v3.8.0.1
Equity - Summary of Information Pertaining to Stock Options Vested and Exercised (Details) - Stock options - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2015
Information pertaining to stock options vested and exercised      
Aggregate intrinsic value of all stock options exercised $ 4,025 $ 4,077 $ 5,536
Net cash proceeds from exercise of stock options $ 924 $ 546 $ 868