XML 82 R71.htm IDEA: XBRL DOCUMENT v3.8.0.1
Schedule of Net Periodic Pension Costs (Detail) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Defined Benefit Plan Net Periodic Benefit Cost [Abstract]    
Service cost $ 952 $ 897
Interest cost 107 40
Expected return on plan assets (215) (181)
Net amortization 105 (164)
Net periodic pension costs $ 949 $ 592