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Financial Information by Geographic Area Data | 12 Months Ended
--- | ---
Mar. 31, 2016
Segments, Geographical Areas [Abstract] |
Industry Segment and Geographic Area Data | Note 21. Financial Information by Geographic Area
|  | United States |  | Canada |  | Consolidated
|  | (All amounts are in thousands U.S. $'s)
Fiscal Year Ended March 31, 2016 |  |  |  |  |  |
Total revenues | $ | 3,130,097 | $ | 145,559 | $ | 3,275,656
Depreciation and amortization, net of (gains) losses on disposal |  | 313,099 |  | 863 |  | 313,962
Interest expense |  | 97,739 |  | 164 |  | 97,903
Pretax earnings |  | 745,194 |  | 23,717 |  | 768,911
Income tax expense |  | 273,473 |  | 6,437 |  | 279,910
Identifiable assets |  | 7,901,365 |  | 249,360 |  | 8,150,725
|  | United States |  | Canada |  | Consolidated
|  | (All amounts are in thousands U.S. $'s)
Fiscal Year Ended March 31, 2015 |  |  |  |  |  |
Total revenues | $ | 2,916,027 | $ | 158,504 | $ | 3,074,531
Depreciation and amortization, net of (gains) losses on disposal |  | 292,345 |  | 5,481 |  | 297,826
Interest expense |  | 96,979 |  | 546 |  | 97,525
Pretax earnings |  | 541,371 |  | 20,047 |  | 561,418
Income tax expense |  | 199,444 |  | 5,233 |  | 204,677
Identifiable assets |  | 6,685,572 |  | 186,603 |  | 6,872,175
|  | United States |  | Canada |  | Consolidated
|  | (All amounts are in thousands U.S. $'s)
Fiscal Year Ended March 31, 2014 |  |  |  |  |  |
Total revenues | $ | 2,681,800 | $ | 153,452 | $ | 2,835,252
Depreciation and amortization, net of (gains) losses on disposal |  | 272,236 |  | 7,358 |  | 279,594
Interest expense |  | 92,128 |  | 564 |  | 92,692
Pretax earnings |  | 516,207 |  | 21,315 |  | 537,522
Income tax expense |  | 189,419 |  | 5,712 |  | 195,131
Identifiable assets |  | 5,854,503 |  | 144,475 |  | 5,998,978

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