XML 87 R73.htm IDEA: XBRL DOCUMENT v3.8.0.1
Quarterly Results of Operations - Schedule of Quarterly Financial Information (Details) (Parenthetical) - USD ($)
$ 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, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2015
Quarterly Financial Information Disclosure [Abstract]                              
Asset impairment $ 6,200 $ 1,400             $ 347     $ 1,400 $ 7,639 $ 3,492 $ 1,705
Income tax expense   $ 1,300                     $ 6,359 2,373 5,111
Effective income tax expense rate 99.60% 32.90% 33.70% 33.30% (109.00%) 43.00% 5.20% 35.90% 11.90% 35.50% 28.90% 36.10%      
Settlement of lawsuits         $ 1,100     $ 540 $ 1,100 $ 8,200 $ 10,300     $ 1,900 $ 11,700