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Financial Information by Geographic Area Data | 12 Months Ended
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Mar. 31, 2017
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, 2017 |  |  |  |  |  |
Total revenues | $ | 3,271,563 | $ | 150,204 | $ | 3,421,767
Depreciation and amortization, net of (gains) losses on disposal |  | 466,378 |  | 5,275 |  | 471,653
Interest expense |  | 112,834 |  | 572 |  | 113,406
Pretax earnings |  | 609,589 |  | 18,769 |  | 628,358
Income tax expense |  | 225,278 |  | 4,656 |  | 229,934
Identifiable assets |  | 9,030,528 |  | 375,312 |  | 9,405,840
|  | United States |  | Canada |  | Consolidated
|  | (All amounts are in thousands U.S. $'s)
Fiscal Year Ended March 31, 2016 |  |  |  |  |  |
Total revenues | $ | 3,129,909 | $ | 145,559 | $ | 3,275,468
Depreciation and amortization, net of (gains) losses on disposal |  | 313,099 |  | 863 |  | 313,962
Interest expense |  | 97,551 |  | 164 |  | 97,715
Pretax earnings |  | 745,194 |  | 23,717 |  | 768,911
Income tax expense |  | 273,473 |  | 6,437 |  | 279,910
Identifiable assets |  | 7,859,928 |  | 249,360 |  | 8,109,288
|  | 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 |  | 6,668,997 |  | 186,603 |  | 6,855,600

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