v3.5.0.2
Note 4 - Segment Information and Significant Customers - Operating Revenue by Geographic Area (Details) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2016
Sep. 30, 2015
UNITED STATES    
Operating revenues $ 233,824 $ 232,710
CANADA    
Operating revenues 20,703 21,944
MEXICO    
Operating revenues 10,513 11,467
Operating revenues $ 265,040 $ 266,121