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Financial Information by Geographic Area Data | 12 Months Ended
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Mar. 31, 2015
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, 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
|  | United States |  | Canada |  | Consolidated
|  | (All amounts are in thousands U.S. $'s)
Fiscal Year Ended March 31, 2013 |  |  |  |  |  |
Total revenues | $ | 2,409,291 | $ | 149,296 | $ | 2,558,587
Depreciation and amortization, net of (gains) losses on disposal |  | 247,413 |  | 7,959 |  | 255,372
Interest expense |  | 90,137 |  | 559 |  | 90,696
Pretax earnings |  | 389,342 |  | 19,145 |  | 408,487
Income tax expense |  | 138,911 |  | 4,868 |  | 143,779
Identifiable assets |  | 5,160,889 |  | 145,712 |  | 5,306,601

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- Definition Tabular disclosure of the names of foreign countries from which revenue is material and the amount of revenue from external customers attributed to those countries. An entity may also provide subtotals of geographic information about groups of countries. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e9038-108599 + Details
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