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Industry Segment and Geographic Area Data | 9 Months Ended
--- | ---
Dec. 31, 2015
Segments, Geographical Areas [Abstract] |
12. Industry Segment and Geographic Area Data | Industry Segment and Geographic Area Data
|  | United States |  | Canada |  | Consolidated
|  | (Unaudited)
|  | (All amounts are in thousands of U.S. $'s)
Quarter ended December 31, 2015 |  |  |  |  |  |
Total revenues | $ | 713,416 | $ | 31,335 | $ | 744,751
Depreciation and amortization, net of (gains) losses on disposals |  | 90,273 |  | 578 |  | 90,851
Interest expense |  | 25,357 |  | 50 |  | 25,407
Pretax earnings |  | 128,799 |  | 3,696 |  | 132,495
Income tax expense |  | 49,776 |  | 950 |  | 50,726
Identifiable assets |  | 7,534,725 |  | 227,809 |  | 7,762,534
Quarter ended December 31, 2014 |  |  |  |  |  |
Total revenues | $ | 671,311 | $ | 35,044 | $ | 706,355
Depreciation and amortization, net of (gains) losses on disposals |  | 85,038 |  | 1,494 |  | 86,532
Interest expense |  | 25,580 |  | 139 |  | 25,719
Pretax earnings |  | 104,830 |  | 2,603 |  | 107,433
Income tax expense |  | 40,203 |  | 690 |  | 40,893
Identifiable assets |  | 6,715,544 |  | 190,988 |  | 6,906,532
|  | United States |  | Canada |  | Consolidated
|  | (Unaudited)
|  | (All amounts are in thousands of U.S. $'s)
Nine Month s ended December 31, 2015 |  |  |  |  |  |
Total revenues | $ | 2,470,785 | $ | 121,674 | $ | 2,592,459
Depreciation and amortization, net of (gains) losses on disposals |  | 215,995 |  | (663) |  | 215,332
Interest expense |  | 71,319 |  | 161 |  | 71,480
Pretax earnings |  | 664,189 |  | 24,409 |  | 688,598
Income tax expense |  | 245,797 |  | 6,368 |  | 252,165
Identifiable assets |  | 7,534,725 |  | 227,809 |  | 7,762,534
Nine Months ended December 31, 2014 |  |  |  |  |  |
Total revenues | $ | 2,297,289 | $ | 134,512 | $ | 2,431,801
Depreciation and amortization, net of (gains) losses on disposals |  | 218,923 |  | 4,200 |  | 223,123
Interest expense |  | 74,347 |  | 397 |  | 74,744
Pretax earnings |  | 529,537 |  | 19,825 |  | 549,362
Income tax expense |  | 196,847 |  | 5,254 |  | 202,101
Identifiable assets |  | 6,715,544 |  | 190,988 |  | 6,906,532

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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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