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Industry Segment and Geographic Area Data | 6 Months Ended
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Sep. 30, 2016
Segments, Geographical Areas [Abstract] |
12. Industry Segment and Geographic Area Data | 12. Industry Segment and Geographic Area Data
|  | United States |  | Canada |  | Consolidated
|  | (Unaudited)
|  | (All amounts are in thousands of U.S. $'s)
Quarter ended September 30, 2016 |  |  |  |  |  |
Total revenues | $ | 950,141 | $ | 48,770 | $ | 998,911
Depreciation and amortization, net of (gains) losses on disposals |  | 114,794 |  | 1,099 |  | 115,893
Interest expense |  | 28,213 |  | 2 |  | 28,215
Pretax earnings |  | 270,644 |  | 8,347 |  | 278,991
Income tax expense |  | 100,272 |  | 2,244 |  | 102,516
Identifiable assets |  | 8,710,057 |  | 297,061 |  | 9,007,118
Quarter ended September 30, 2015 |  |  |  |  |  |
Total revenues | $ | 915,906 | $ | 46,997 | $ | 962,903
Depreciation and amortization, net of (gains) losses on disposals |  | 68,983 |  | (262) |  | 68,721
Interest expense |  | 23,973 |  | – |  | 23,973
Pretax earnings |  | 276,263 |  | 10,832 |  | 287,095
Income tax expense |  | 100,926 |  | 2,790 |  | 103,716
Identifiable assets |  | 7,376,921 |  | 223,624 |  | 7,600,545
|  | United States |  | Canada |  | Consolidated
|  | (Unaudited)
|  | (All amounts are in thousands of U.S. $'s)
Six Months ended September 30, 2016 |  |  |  |  |  |
Total revenues | $ | 1,831,088 | $ | 91,232 | $ | 1,922,320
Depreciation and amortization, net of (gains) losses on disposals |  | 216,794 |  | 2,422 |  | 219,216
Interest expense |  | 54,857 |  | 2 |  | 54,859
Pretax earnings |  | 495,557 |  | 16,565 |  | 512,122
Income tax expense |  | 184,017 |  | 4,457 |  | 188,474
Identifiable assets |  | 8,710,057 |  | 297,061 |  | 9,007,118
Six Months ended September 30, 2015 |  |  |  |  |  |
Total revenues | $ | 1,757,369 | $ | 90,339 | $ | 1,847,708
Depreciation and amortization, net of (gains) losses on disposals |  | 125,722 |  | (1,241) |  | 124,481
Interest expense |  | 45,962 |  | 111 |  | 46,073
Pretax earnings |  | 535,390 |  | 20,713 |  | 556,103
Income tax expense |  | 196,021 |  | 5,418 |  | 201,439
Identifiable assets |  | 7,376,921 |  | 223,624 |  | 7,600,545

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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 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e9038-108599 Reference 2: 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 + Details
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