v3.4.0.3
Note 4 - Operating Revenue by Geographic Area (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2016
Mar. 31, 2015
UNITED STATES        
Operating revenues $ 228,458 $ 196,287 $ 703,010 $ 532,664
CANADA        
Operating revenues 19,745 23,485 62,883 80,481
MEXICO        
Operating revenues 11,371 11,930 35,201 34,343
Operating revenues $ 259,574 $ 231,702 $ 801,094 $ 647,488