Annual report pursuant to Section 13 and 15(d)

ACCOUNTING PRONOUNCEMENTS - Narrative (Details)

v3.8.0.1
ACCOUNTING PRONOUNCEMENTS - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                      
Reduction to income tax expense       $ 1,234         $ 1,234    
Diluted (in dollars per share) $ 0.60 $ 0.91 $ 0.46 $ 0.32 $ 0.74 $ 0.73 $ 0.43 $ 0.14 $ 2.28 $ 2.03 $ 1.91
Accounting Standards Update 2016-09                      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                      
Diluted (in dollars per share)       $ 0.04         $ 0.04