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Industry Segment and Geographic Area Data (Table Text Block) | 6 Months Ended
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Sep. 30, 2017
Geographic Areas, Long-Lived Assets [Abstract] |
Industry Segment and Geographic Area Data |
|  | United States |  | Canada |  | Consolidated
|  | (Unaudited)
|  | (All amounts are in thousands of U.S. $'s)
Quarter Ended September 30, 2017 |  |  |  |  |  |
Total revenues | $ | 988,808 | $ | 53,878 | $ | 1,042,686
Depreciation and amortization, net of (gains) losses on disposals |  | 136,597 |  | 2,325 |  | 138,922
Interest expense |  | 31,268 |  | 755 |  | 32,023
Pretax earnings |  | 192,585 |  | 4,773 |  | 197,358
Income tax expense |  | 71,280 |  | 1,439 |  | 72,719
Identifiable assets |  | 9,621,634 |  | 461,256 |  | 10,082,890
Quarter Ended September 30, 2016 |  |  |  |  |  |
Total revenues | $ | 949,915 | $ | 48,770 | $ | 998,685
Depreciation and amortization, net of (gains) losses on disposals |  | 114,794 |  | 1,099 |  | 115,893
Interest expense |  | 27,987 |  | 2 |  | 27,989
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
|  | United States |  | Canada |  | Consolidated
|  | (Unaudited)
|  | (All amounts are in thousands of U.S. $'s)
Six Months Ended September 30, 2017 |  |  |  |  |  |
Total revenues | $ | 1,901,922 | $ | 98,689 | $ | 2,000,611
Depreciation and amortization, net of (gains) losses on disposals |  | 268,096 |  | 3,829 |  | 271,925
Interest expense |  | 60,911 |  | 1,457 |  | 62,368
Pretax earnings |  | 384,558 |  | 11,486 |  | 396,044
Income tax expense |  | 141,890 |  | 3,308 |  | 145,198
Identifiable assets |  | 9,621,634 |  | 461,256 |  | 10,082,890
Six Months Ended September 30, 2016 |  |  |  |  |  |
Total revenues | $ | 1,830,644 | $ | 91,232 | $ | 1,921,876
Depreciation and amortization, net of (gains) losses on disposals |  | 216,794 |  | 2,422 |  | 219,216
Interest expense |  | 54,413 |  | 2 |  | 54,415
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

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- Definition Tabular disclosure of the names of foreign countries in which material long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets are located, and amount of such long-lived assets located in that country or foreign geographic area. + 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 (b) -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9038-108599 + Details
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